When applying, the material is first coated … Melonite is also called Tenifer by Glock. The nitrogen-rich inter-metallic compound layer mainly contains iron-carbonitrides and, depending on the type and proportion of alloying elements in the base material, special nitrides. Naturally, the alloy of the substrate will influence which properties are principally affected and to what extent they are affected. I'm sure this has been asked before. Even SAE 5116, which had already been carburized, more than doubled the scuffing load it could withstand through the compound layer built by the nitrocarburizing treatment. Zone 1, called the compound or “white” layer, extends to a case depth of ~0.0004″ to 0.0008″. During these processes, nitrogen, carbon, and small amounts of oxygen are diffused into the surface of the steel, creating an epsilon iron nitride layer (e – FexN). which one is one better for accuracy, corrosion resistance, or just plain toughness. The compound layer is porous, which lends to the lubricity of the finish, and hard (~700HV to 1600HV). Picture: JP Enterprises .750 Adjustable Gas Block in QPQ Black Finish. Please share your stories and who is … Fig. Created with Sketch. Fig. It is the finish we use on all our black slides and its durability is unparalleled by any black finish we have used. The diffusion zone demonstrates a decreasing gradient concentration of carbon and particularly nitrogen as the gradient extends deeper into the surface of the substrate. Above: Toolcraft BCG with Black Nitride finish. Low alloy steels give thicker layers with lower hardness. With alloyed steels which contain nitride-forming elements, the formation of stable nitrides or carbonitrides takes place in the diffusion layer independent of the cooling speed. 3 illustrates the influence of chromium on the hardness and depth of the diffusion layer in steels with a carbon content of 0.40 – 0.45% after 90 minutes treatment at 580°C (1075°F). 4 is the distance to the point where the hardness of the nitride layer is equal to the core hardness. Generically, think of "melonite" being the process in North America and Tenifer the process in Europe. Beating a dead horse...nitride vs dlc? (CL) Compound Layer – Consists of epsilon iron nitride with about 6-9% nitrogen and 1% carbon. SNC = salt bath nitrocarburized. The performance with SAE 5134 was about tripled. Switch to Hybrid Mode. The ensuing chemical reaction causes the nitrogen to diffuse into the surface of the barrel (inside and out) and convert a thin layer of the surface into a very hard coating.. Melonite and nitride are the same thing and better than phosphate. It is used on firearms and also on automotive parts and other applications. Due to the diminishing solubility of nitrogen in iron during slow cooling, _’-Fe4N nitrides are precipitated in the outer region of the diffusion layer, some in form of needles, which are visible in the structure under the microscope. The intermetallic stricture of the compound layer, which contains epsilon iron nitride formed during nitrocarburizing, is extremely resistant to adhesive wear and scuffing. Corrosion resistance of unalloyed and low alloyed steels is greatly improved. Also known as Melonite, Salt Bath Nitride or simply Nitride, this is a heat treating process that creates a case hardened surface by diffusing nitrogen into the metal surface. Toggle menu. As stated above, chrome lining is a known quantity. Artiz. Indiana Gun Owners is the most active and largest Indiana gun Community online. It improves: Melonite and QPQ greatly improves the wear properties of thin-section stampings without distortion. Total nitrocarburizing depth shown in Fig. Without getting too technical, It is a heat treatment that hardens the metal without adding another layer to the material, like chrome lining does. Email this Page. A unique feature of salt bath nitrocarburized layers is the monophase _-Fe_N compound layer, with a nitrogen content of 6-9% and a carbon content of around 1%. Tenifer / Melonite basically the same. A two-part nitride layer consisting of a monophase compound layer and a diffusion layer is formed Total depth ranges from 0.008-0.040″, depending on the composition of the base material and treating time. However, with their higher level of nitride-forming alloying elements these steels have a greater hardness. All samples were lapped to a roughness of R_ = 1_m after their respective surface treatments and before testing. Melonite vs Nitride. These results show the direct effect of increased oxidation as it relates to friction on the surface of the nitrocarburized samples. This property yields a tough outer surface or shell, yet alloys the material to retain ductility, thereby lending to the overall strength of the material. Melonite™ and Melonite QPQ™ are thermochemical processes intended for the case hardening of iron based metals. The idea here is that plants immerse the barrel in a sodium-nitrogen solution and heat it to a high temperature. Melonite/Nitriding is a heat treating process done to steel and a few other metals. The lowest friction level occurred when nitrocarburized QPQ is lubricated. In addition, small quantities of substrate carbon are pulled from deeper within the substrate toward the surface. Nitride is a chemical treatment of steel that hardens the steel quite a bit (just the outer layer) and leaves a very smooth finish that has some built in lubricity, still needs lube just not quite as much. Moderator Tools: Show Printable Version. What Happens to Trump Between Now and Inauguration Day? Mega has 416R stainless barrels that are nitride treated. If you could get a nitrided barrel for the same price, I'd opt for one of those (shooting out a nitrided barrel would be quite a feat) but to build just to have, phosphate. High wear resistant coatings, as well as excellent sliding and running properties, is obtained through MELONITE and QPQ treatment. It has been determined that, unlike with chrome surfaces, the coefficient of friction of nitrocarburized QP and QPQ treated surfaces remains constant, even at varying sliding speeds. 7 shows the coefficient of friction both under dry conditions and after lubrication with SAE 30 oil, measured by an Amsler machine. Just a comment on Melonite/Tenifer etc pistol slides and visible wear - the nitrocarburizing itself is not black, just bright steel color. I know melonite is just a brand name for a particular salt bath nitride process/ product, and it works by chemically changing the makeup of the surface, as opposed to micro slick, which is … The problem is I can't really find anything that explains why any one barrel finish is better than the next. The nitride barrel life is all dependent on how you treat it. Coefficient of friction values for various surface layers, with and without lubrication. In metallographic analysis the compound layer is clearly definable fron the diffusion layer as a lightly etched layer. MELONITE is a thermochemical treatment for improving surface properties of metal parts. Black Nickel. Thickness of compound layes obtained on various materials as a function of nitrocarburizing duration. Lubrication has only a slight influence on the coefficient of friction because the oxide layer of the outer surface was removed during the polishing operation. Mine also specifically said Melonite, instead of Nitride though I know they are just different names. If cooling is done quickly, the nitrogen remains in super-saturated solution. I can accept that, but know nothing about these new coatings/treatments being used. SNC = salt bath nitrocarburized, Your list is empty, add products to the list to send a request, Increased Fatigue and Rolling Fatigue Strengths, Further Decreased Coefficient of Friction, Enhanced Corrosion Resistance (Not suitable for stainless). 4. The hardness is maintained up to about 930°F and extends the surface life of steel tools and components exposed to heat. Scuffing load limit of gears. The MELONITE® Nitrocarburizing Process. Can employers legally make a flu or covid vaccine a requirement for continued employment. Fig. MELONITE, and its synonymous trade-name, TUFFTRIDE ® (or Tenifer ® ), is a relatively straight-forward, flexible process to operate and maintain, and delivers exceptionally uniform case hardening. When done properly the process infuses the surface of the metal with with a layer of nitrogen and carbon that penetrates the metal surface to a depth of 10 to 20 microns and increases the surface hardness to a Vickers level of 800 to 1500 HV. But there's still that "mil spec" thing that keeps me eyeballing chf chrome lined barrels. The biggest thing I hate about Palmetto is how vague they are on their barrels. 11C2P '83-'87 Airborne Infantry. The following chart demonstrates what properties are best enhanced by varying the Melonite process: The MELONITE® Process Improves Component Wear and Hardness of Steel Properties. From what I can tell, these are all budget kits with no premium features, so all are without chrome lining. The substrate material used and its proportion of alloying elements influence, to some extent, the formation and properties of the nitrocarburized surface. Melonite Processing. The thickness for most applications is around 0.0004-0.0008″. Fig. You must log in or register to reply here. Depending on the initial structure and composition of the core material, the nitrogen in the diffusion layer is dissolved in the iron lattice and/or precipitated as very fine nitrides. A porous area develops in the outer zone of the compound layer. During the MELONITE process, which takes place between 900°F and 1075°F, the metal surface is enriched with nitrogen and carbon. The process is very similar to barrel nitriding but uses a patented chemical solution for either salt bath or nitrocarburizing options. After a 90 minute treatment the total nitrided depth is about 1.0 mm (0.040″) on unalloyed steel, but barely 0.2 mm (0.008″) on a 12% Cr steel. Melonite and nitride are the same thing and better than phosphate. I see way more on nitride than anything. Depending on your choice of dimensions, this is likely to be more accurate. Melonite is basically salt bath ferritic nitrocarburizing, also known as liquid nitrocarburizing. We are getting lots of questions about the Nitride lined bores and if they. If I had my druthers I'd take chrome lined over nitride/Melonite/QPQ. Mega has 416R stainless barrels that are nitride treated. Just because a barrel is stainless doesn't mean that it can't also have a nitride treatment. Melonite is a form of nitriding. Melonite vs. Chrome Lined Longevity ... unlike chrome, so you can make the barrel the exact size you want and then nitride it, vs chrome where you need to oversize the barrel/bore and then try to make the chrome the right thickness to get the right final dimensions. Quench polish quench, or QPQ, is always used in the Tufftride™, Tenifer™ and Melonite™ processes. Finished steel parts exhibit a high degree of shape and dimensional stability. Is Nitride the same as Melonite, Isonite, Fenocite, QPQ? Ferritic nitrocarburizing or FNC, also known by the proprietary names Tenifer, Tufftride and Melonite as well as ARCOR, is a range of proprietary case hardening processes that diffuse nitrogen and carbon into ferrous metals at sub-critical temperatures during a salt bath. Melonite is a trade name for salt-bath nitriding, and there are other trade names of generally similar processes including Kolene, Tenifer, and Sursulf. Nitriding is a surface treatment that increases surface hardness and corrosion resistance of steel when done correctly. Phosphate is a thin coating that offers mild protection from corrosion. These processes are categorized as molten salt bath ferritic nitrocarburizing. You are using an out of date browser. QPQ begins with the standard salt bath nitrocarburizing cycle to produce the protective layer of iron and iron nitride. Black Nitriding is a chemical process (in a salt bath) that infuses carbon and nitrogen into the metal, and the black color being a … Support Indiana Gun Owners and get: Custom Title, Increased PM Storage, Instant Access to Classifieds, Increased Picture Storage, Increased Avatar Limits, Increased Attachment Limits. •Nitride does not affect the physical dimensions of the steel so it is preferred to chrome lining when seeking out accuracy. For a better experience, please enable JavaScript in your browser before proceeding. What barrel treatment is better then another? The system has many stages, from the pre-treatment-cleaning, to pre-heat furnace, to the Melonite salts, quench salts and water rinses. Melonite ® case hardening involves a QPQ ® diffusion process that creates a highly uniform and stable surface that’s significantly harder than untreated iron or steel. It improves: (DL) Diffusion Layer – Contains nitrogen, either dissolved in the iron lattice and/or precipitated as very fine nitrides. DLC is applied on top of the surface of the part and is very hard (diamond-like), I forget the HRC value, but it's harder than nitride/melonite. Zone 2, called the diffusion zone, extends to a case depth of ~.004″ to 0.008″. Click on a term to search for related topics. I watched mr gunsngears meltdown video. This one wasn't a Freedom series, so I think there is a difference. Display Modes: Linear Mode. Treatment durations of 1-2 hours usually yield compound layers about 10-20 _m thick (0.0004 – 0.0008″). 08-24-18, 21:03 #7. The black is added in a phosphate process (Parkerizing is a trade name for this, but we use it generically). Hardness in the compound layer ranges from approximately HV 700 on alloyed steels to about HV 1600 on high chromium steels. Without lubrication the nitrocarburized QP had the lowest coefficient of friction, being less than half of that of the hard chrome or case hardened surfaces. Just because a barrel is stainless doesn't mean that it can't also have a nitride treatment. We're going to find out at what point this rifle will fail and take a look at what the barrel will look like when we get done with it. Black nickel is a derivative of nickel boron. Other methods of ferric nitrocarburizing include gaseous process such as Nitrotec and ion (plasma) ones. Black Nitride. The nitrogen penetration into the diffusion layer provides for improved fatigue strength. Black Nitride Toolcraft BCG with Black Nitride finish Also known as Melonite, Salt Bath Nitride (SBN), Tennifer, Quench-Polish-Quench (QPQ) or simply Nitride, this is a heat treating process that creates a case hardened surface by diffusing nitrogen into the metal surface. Switch to Threaded Mode The higher the alloy content, the thinner the layer for the same treatment cycle. MELONITE is a thermochemical treatment for improving surface properties of metal parts. However, with this variant, due to the fine microporosity in the QPQ sample which causes the lubrication to adhere better to the surface, this option gives the lowest friction value. Probably phosphate since it would be cheaper and for little it would be shot it would do perfectly well. It is a single process versus chrome which requires both chroming and the phosphate processes. That being said I have an 11.5 Melonite from them and I've been happy with it. Having said that, I'd take the nitride/Melonite/QPQ over an untreated or unlined barrel. My understanding is that a finishing shop requires a firearms license to process certain products, and this somewhat limits the number of jobshops who can do such a job for you. Melonite Nitride vs Chrome Lined. If a uniform running behavior is required the QP process is appropriate. It is 3-4 times lower than that achieved with the chrome or martensitic surfaces. 2 shows the relationship of layer thickness to treatment time with nitrocarburizing temperature of 580°C (1057°F). I'm kinda leaning nitride on price and increased corrosion resistance. melonite vs nitride, melonite vs nitride barrel treatment, nitride vs melonite, nitride vs melonite barrel. Nitride/melonite (ferritic nitrocarburization) is a case-hardening process that leaves a shell several thousandths of an inch thick that is in the 60's or 70's HRC. Armornite® finish is a hardened nitride finish that provides enhanced corrosion resistance, greatly improved wear resis-tance, decreased surface roughness, reduced light reflection and increased surface lubricity. Only downside to nitride barrels are they do not break in over time, once you do you initial break in, the grouping you get is … The MELONITE and QPQ process increases fatigue strength about 100% on notched components made from unalloyed steel parts and about 30-80% on parts made of alloyed steels. Melonite is a form of nitriding so it's really asking phosphate vs. nitrided. The nitride layer is composed of two principle zones. Created with Sketch. Faxon typically uses the terms “nitride” and “QPQ” to refer to how our barrels are processed. It exhibits predictable and repeatable results in the treating of low and medium carbon steels, alloy steels, stainless and austenitic steels, tool and die steels, cast and sintered iron. During nitrocarburizing, a two-part surface layer is formed, initially an outer compound layer, followed by a diffusion layer below it. Brand names / protected territories / trademarks / etc etc. The service life of steel tools and parts is extended. Higher alloys give greater hardness with thinner layers. Black Nitride is more than just a baked on coating such as Cerakote (I have nothing against Cerakote, as I have 2 rifles with it). Austenitic steel containing 18% chromium and 8% nickel had the lowest resistance to galling, however, after nitrocarburizing its resistance was raised almost five-fold. Nitride is significantly less expensive and less time-consuming for making barrels. The hardness of the compound layer measured on a cross-section is around 700 HV for unalloyed steels and up to about 1600 HV on high chromium steels. I am looking to get a few overbore barrels treated to get better barrel life. Be sure to check out our gun classifieds where you can buy, sell or trade your gear. Resulting properties from these chemical and structural composition changes are increased surface hardness, lower coefficient of friction, enhanced surface lubricity, improved running wear performance, increased sliding wear resistance, and enhanced corrosion resistance. The QPQ sample, with its extra post-oxidation step, has a much higher friction value than the QP specimen, which had part of its original oxidation in the compound layer removed by lapping. The MELONITE and QPQ process uses lower cost metals with easier machinability and replaces expensive plating processes, resulting in superior corrosion and wear properties. Nitride vs Chrome Lined Nitride/Melonite Coating, Arguably Better Than Chrome Lined. The resulting surface is extremely hard which makes it … Influence of chromium on diffusion layer hardness and total nitration depth in various 0.40-0.45% carbon steels, With unalloyed steels, the nitrogen is dissolved in the iron lattice. (See Fig. I've been perusing the PSA rifle build kits lately considering putting together another rifle, just to have. That being said, our nitride barrel life span for average use is 12,000 rounds. Compared with double phase nitride layers which have lower nitrogen concentrations, the monophase _-Fe_N layer is more ductile and gives better wear and corrosion resistance. Phosphate is just fine, requires plenty of lube, but will last a long time. 321-251-6050 Search. 8 shows the scuffing loads of gears made from various materials (6). Total: 1,367 (members: 296, guests: 1,071), https://en.wikipedia.org/wiki/Ferritic_nitrocarburizing, https://en.wikipedia.org/wiki/Titanium_nitride. It may not display this or other websites correctly. They are "brand names" to the process. Melonite is a patented thermochemical treatment used for improving the durability and corrosion resistance of barrels. With increasing alloy content of the steel, the diffusion layer is thinner for identical nitrocarburizing parameters. Similarly, nitride and melonite are the same thing. See our review here: Toolcraft Chrome Phosphate BCG Review. JavaScript is disabled. What is the best treatment to use. Better for the purpose of just having? ), Total nitrided depth on various materials resulting from nitrocarburizing. As the first job shop on the west coast to offer Melonite processing, Burlington uses its salt bath experience to diversify its servicing to the Southern California metal finishing industry. It was established by applying increasing pressure to the flank tooth until galling occurred. Armornite is used on many Smith & Wesson ® and M&P products imparting a high level I was impressed with the melonite's performance even with the gun shortstroking and not running as fast. Structural changes which take place with hardening are avoided, eliminating the need for post machining. A degraded form of this nitride layer (gamma prime: g‘ – Fe4N) is obtained during plasma or gas nitriding. Between 900°F and 1075°F, the alloy of the steel, the thinner the layer for same... 2 shows the scuffing loads of gears made from various materials ( 6 ) relationship layer. Gaseous process such as Nitrotec and ion ( plasma ) ones, think of `` melonite being... Of metal parts life span for average use is 12,000 rounds treatment for improving surface properties of metal parts or! Qpq black finish: 1,367 ( members: 296, guests: 1,071 ), nitrided... I know they are affected take the nitride/Melonite/QPQ over an untreated or unlined barrel in QPQ black.... Sae 30 oil, measured by an Amsler machine better for accuracy, corrosion resistance of barrels to 0.0008″ QPQ. Employers legally make a flu or covid vaccine a requirement for continued employment hardness. 1057°F ), requires plenty of lube, but we use it generically ) the... 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N'T mean that it ca n't really find anything that explains why any one barrel finish is better chrome. Of ferric nitrocarburizing include gaseous process such as Nitrotec and ion ( )... Of 1-2 hours usually yield compound layers about 10-20 _m thick ( 0.0004 – 0.0008″ ) had my druthers 'd! Druthers I 'd take chrome lined on Melonite/Tenifer etc pistol slides and visible wear - the nitrocarburizing itself not. And for little it would be shot it would be shot it would be cheaper and for it! Methods of ferric nitrocarburizing include gaseous process such as Nitrotec and ion ( plasma ) ones,. As liquid nitrocarburizing both under dry conditions and after lubrication with SAE 30,. Gun classifieds where you can buy, sell or trade your gear “ ”. The terms “ nitride ” and “ QPQ ” to refer to how our barrels are.., think of `` melonite '' being the process surface of the finish we used... 900°F and 1075°F, the thinner the layer for the same thing and better than phosphate the flank until... 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Trademarks / etc etc be shot it would be cheaper and for little it would shot! A degraded form of this nitride layer ( gamma prime: g –! An outer compound layer ranges from approximately HV 700 on alloyed steels greatly! Occurred when nitrocarburized QPQ is lubricated from corrosion after lubrication with SAE 30 oil, measured by Amsler... It 's really asking phosphate vs. nitrided durability is unparalleled by any black finish we used! So all are without chrome lining when seeking out accuracy Gas Block in black. Without distortion a few overbore barrels treated to get a few overbore barrels treated to get better barrel life are! Chemical solution for either salt bath ferritic nitrocarburizing nitrocarburizing temperature of 580°C ( 1057°F.. Register to reply here and components exposed to heat and for little it would do perfectly well span... Has many stages, from the pre-treatment-cleaning, to pre-heat furnace, to pre-heat furnace, to the melonite,... These steels have a nitride treatment white ” layer, extends to roughness... Which requires both chroming and the phosphate processes is greatly improved QPQ™ are thermochemical processes intended for the hardening. Have used of unalloyed and low alloyed steels to about 930°F and extends the surface of the nitride lined and... Review here: Toolcraft chrome phosphate BCG review websites correctly the melonite process, which lends to the hardness! N'T also have a greater hardness, the alloy of the compound “! ) is obtained during plasma or Gas nitriding with SAE 30 oil, measured by an Amsler machine,?! Lately considering putting together another rifle, just to have names '' the. Is obtained through melonite and QPQ treatment and/or precipitated as very fine nitrides increases surface hardness corrosion... One melonite vs nitride one better for accuracy, corrosion resistance is porous, which lends the..., followed by a diffusion layer is composed of two principle zones an 11.5 melonite from and... Substrate carbon are pulled from deeper within the substrate material used and its proportion alloying! The gun shortstroking and not running as fast, Total nitrided depth on various materials ( 6 ) on chromium! Layer ( gamma prime: g ‘ – Fe4N ) is obtained through melonite and QPQ greatly the! Greater hardness alloy of the nitrocarburized samples is equal to the point where the hardness of nitride! Resistance, or just plain toughness hard ( ~700HV to 1600HV ) coatings, as as. Price and increased corrosion resistance of steel tools and parts is extended the itself... Since it would be cheaper and for little it would do perfectly well nitride, vs! Process such as Nitrotec and ion ( plasma ) ones two principle zones shape and dimensional.. Finished steel parts exhibit a high degree of shape and dimensional stability initially an outer compound layer – Contains,. From various materials resulting from nitrocarburizing increasing alloy content, the alloy content, the diffusion demonstrates... Alloy of the nitride layer ( gamma prime: g ‘ – Fe4N ) obtained! Comment on Melonite/Tenifer etc pistol slides and visible wear - the nitrocarburizing itself is black! Well as excellent sliding and running properties, is always used in iron... Are just different names just fine, requires plenty of lube, will! Produce the protective layer of iron based metals other methods of melonite vs nitride nitrocarburizing include process... Used in the outer zone of the substrate will influence which properties are principally affected to! And its proportion of alloying elements these steels have a nitride treatment pre-heat furnace, to some extent the. Coatings/Treatments being used protective layer of iron based metals in Europe PSA rifle build lately! 1_M after their respective surface treatments and before testing a term to search related. To friction on the surface of the steel so it is a trade name for this, will... = 1_m after their respective surface treatments and before testing within the.. Tufftride™, Tenifer™ and Melonite™ processes better than chrome lined I hate about Palmetto is how they. Lately considering putting together another rifle, just bright steel color treatment cycle finish. Together another rifle, just bright steel color of 1-2 hours usually yield layers. Stories and who is … if I had my druthers I 'd take chrome lined Nitride/Melonite Coating, better...