Melonite/Nitriding is a heat treating process done to steel and a few other metals. 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.. But there's still that "mil spec" thing that keeps me eyeballing chf chrome lined barrels. If cooling is done quickly, the nitrogen remains in super-saturated solution. Melonite Processing. Black Nitriding is a chemical process (in a salt bath) that infuses carbon and nitrogen into the metal, and the black color being a … 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. It may not display this or other websites correctly. Phosphate is just fine, requires plenty of lube, but will last a long time. If I had my druthers I'd take chrome lined over nitride/Melonite/QPQ. Total: 1,367 (members: 296, guests: 1,071), https://en.wikipedia.org/wiki/Ferritic_nitrocarburizing, https://en.wikipedia.org/wiki/Titanium_nitride. (See Fig. ), Total nitrided depth on various materials resulting from nitrocarburizing. 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 trade name for salt-bath nitriding, and there are other trade names of generally similar processes including Kolene, Tenifer, and Sursulf. 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. Probably phosphate since it would be cheaper and for little it would be shot it would do perfectly well. During the MELONITE process, which takes place between 900°F and 1075°F, the metal surface is enriched with nitrogen and carbon. Similarly, nitride and melonite are the same thing. The nitrogen penetration into the diffusion layer provides for improved fatigue strength. Is Nitride the same as Melonite, Isonite, Fenocite, QPQ? I've been perusing the PSA rifle build kits lately considering putting together another rifle, just to have. 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. The MELONITE® Nitrocarburizing Process. 4 is the distance to the point where the hardness of the nitride layer is equal to the core hardness. For a better experience, please enable JavaScript in your browser before proceeding. The nitride layer is composed of two principle zones. The system has many stages, from the pre-treatment-cleaning, to pre-heat furnace, to the Melonite salts, quench salts and water rinses. Tenifer / Melonite basically the same. (CL) Compound Layer – Consists of epsilon iron nitride with about 6-9% nitrogen and 1% carbon. melonite vs nitride, melonite vs nitride barrel treatment, nitride vs melonite, nitride vs melonite barrel. If a uniform running behavior is required the QP process is appropriate. 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. It is 3-4 times lower than that achieved with the chrome or martensitic surfaces. During nitrocarburizing, a two-part surface layer is formed, initially an outer compound layer, followed by a diffusion layer below it. Nitride vs Chrome Lined Nitride/Melonite Coating, Arguably Better Than Chrome Lined. Just because a barrel is stainless doesn't mean that it can't also have a nitride treatment. Melonite Nitride vs Chrome Lined. Black nickel is a derivative of nickel boron. 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. I watched mr gunsngears meltdown video. Zone 1, called the compound or “white” layer, extends to a case depth of ~0.0004″ to 0.0008″. The intermetallic stricture of the compound layer, which contains epsilon iron nitride formed during nitrocarburizing, is extremely resistant to adhesive wear and scuffing. With increasing alloy content of the steel, the diffusion layer is thinner for identical nitrocarburizing parameters. Fig. The black is added in a phosphate process (Parkerizing is a trade name for this, but we use it generically). Support Indiana Gun Owners and get: Custom Title, Increased PM Storage, Instant Access to Classifieds, Increased Picture Storage, Increased Avatar Limits, Increased Attachment Limits. The compound layer is porous, which lends to the lubricity of the finish, and hard (~700HV to 1600HV). Total nitrocarburizing depth shown in Fig. 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. You must log in or register to reply here. Display Modes: Linear Mode. 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. 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). Above: Toolcraft BCG with Black Nitride finish. Can employers legally make a flu or covid vaccine a requirement for continued employment. Created with Sketch. 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. 08-24-18, 21:03 #7. The resulting surface is extremely hard which makes it … Moderator Tools: Show Printable Version. The substrate material used and its proportion of alloying elements influence, to some extent, the formation and properties of the nitrocarburized surface. Low alloy steels give thicker layers with lower hardness. A porous area develops in the outer zone of the compound layer. Armornite is used on many Smith & Wesson ® and M&P products imparting a high level The lowest friction level occurred when nitrocarburized QPQ is lubricated. Faxon typically uses the terms “nitride” and “QPQ” to refer to how our barrels are processed. SNC = salt bath nitrocarburized. The hardness is maintained up to about 930°F and extends the surface life of steel tools and components exposed to heat. Switch to Hybrid Mode. 4. I see way more on nitride than anything. 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. 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. 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. 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. This one wasn't a Freedom series, so I think there is a difference. 8 shows the scuffing loads of gears made from various materials (6). I am looking to get a few overbore barrels treated to get better barrel life. The performance with SAE 5134 was about tripled. 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. Indiana Gun Owners is the most active and largest Indiana gun Community online. 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. 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. 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. The idea here is that plants immerse the barrel in a sodium-nitrogen solution and heat it to a high temperature. Better for the purpose of just having? Email this Page. Fig. Hardness in the compound layer ranges from approximately HV 700 on alloyed steels to about HV 1600 on high chromium steels. 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. 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. These processes are categorized as molten salt bath ferritic nitrocarburizing. Melonite vs Nitride. It improves: (DL) Diffusion Layer – Contains nitrogen, either dissolved in the iron lattice and/or precipitated as very fine nitrides. The diffusion zone demonstrates a decreasing gradient concentration of carbon and particularly nitrogen as the gradient extends deeper into the surface of the substrate. What is the best treatment to use. 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 … Mine also specifically said Melonite, instead of Nitride though I know they are just different names. Artiz. 7 shows the coefficient of friction both under dry conditions and after lubrication with SAE 30 oil, measured by an Amsler machine. The thickness for most applications is around 0.0004-0.0008″. 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. We are getting lots of questions about the Nitride lined bores and if they. 2 shows the relationship of layer thickness to treatment time with nitrocarburizing temperature of 580°C (1057°F). Zone 2, called the diffusion zone, extends to a case depth of ~.004″ to 0.008″. 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. which one is one better for accuracy, corrosion resistance, or just plain toughness. 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 also called Tenifer by Glock. Click on a term to search for related topics. Melonite is basically salt bath ferritic nitrocarburizing, also known as liquid nitrocarburizing. Quench polish quench, or QPQ, is always used in the Tufftride™, Tenifer™ and Melonite™ processes. MELONITE is a thermochemical treatment for improving surface properties of metal parts. Mega has 416R stainless barrels that are nitride treated. Switch to Threaded Mode That being said, our nitride barrel life span for average use is 12,000 rounds. Melonite is a form of nitriding. Corrosion resistance of unalloyed and low alloyed steels is greatly improved. Melonite is a patented thermochemical treatment used for improving the durability and corrosion resistance of barrels. Higher alloys give greater hardness with thinner layers. A degraded form of this nitride layer (gamma prime: g‘ – Fe4N) is obtained during plasma or gas nitriding. I can accept that, but know nothing about these new coatings/treatments being used. 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. Created with Sketch. Austenitic steel containing 18% chromium and 8% nickel had the lowest resistance to galling, however, after nitrocarburizing its resistance was raised almost five-fold. 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). Be sure to check out our gun classifieds where you can buy, sell or trade your gear. Please share your stories and who is … 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. 321-251-6050 Search. It improves: Melonite and QPQ greatly improves the wear properties of thin-section stampings without distortion. 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. Toggle menu. 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. That being said I have an 11.5 Melonite from them and I've been happy with it. Generically, think of "melonite" being the process in North America and Tenifer the process in Europe. Nitride is significantly less expensive and less time-consuming for making barrels. It is a single process versus chrome which requires both chroming and the phosphate processes. I'm sure this has been asked before. 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. It is used on firearms and also on automotive parts and other applications. 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. Just a comment on Melonite/Tenifer etc pistol slides and visible wear - the nitrocarburizing itself is not black, just bright steel color. 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. 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 … Scuffing load limit of gears. 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). From what I can tell, these are all budget kits with no premium features, so all are without chrome lining. It is the finish we use on all our black slides and its durability is unparalleled by any black finish we have used. In addition, small quantities of substrate carbon are pulled from deeper within the substrate toward the surface. Melonite and nitride are the same thing and better than phosphate. 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). 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%. The process is very similar to barrel nitriding but uses a patented chemical solution for either salt bath or nitrocarburizing options. What barrel treatment is better then another? JavaScript is disabled. Treatment durations of 1-2 hours usually yield compound layers about 10-20 _m thick (0.0004 – 0.0008″). 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. See our review here: Toolcraft Chrome Phosphate BCG Review. 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. Without getting too technical, It is a heat treatment that hardens the metal without adding another layer to the material, like chrome lining does. Structural changes which take place with hardening are avoided, eliminating the need for post machining. QPQ begins with the standard salt bath nitrocarburizing cycle to produce the protective layer of iron and iron nitride. Beating a dead horse...nitride vs dlc? The service life of steel tools and parts is extended. These results show the direct effect of increased oxidation as it relates to friction on the surface of the nitrocarburized samples. The problem is I can't really find anything that explains why any one barrel finish is better than the next. Having said that, I'd take the nitride/Melonite/QPQ over an untreated or unlined barrel. They are "brand names" to the process. 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. Melonite™ and Melonite QPQ™ are thermochemical processes intended for the case hardening of iron based metals. I'm kinda leaning nitride on price and increased corrosion resistance. Other methods of ferric nitrocarburizing include gaseous process such as Nitrotec and ion (plasma) ones. 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. Black Nitride. Naturally, the alloy of the substrate will influence which properties are principally affected and to what extent they are affected. •Nitride does not affect the physical dimensions of the steel so it is preferred to chrome lining when seeking out accuracy. Coefficient of friction values for various surface layers, with and without lubrication. 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. Depending on your choice of dimensions, this is likely to be more accurate. 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 is a form of nitriding so it's really asking phosphate vs. nitrided. However, with their higher level of nitride-forming alloying elements these steels have a greater hardness. The nitride barrel life is all dependent on how you treat it. When applying, the material is first coated … Brand names / protected territories / trademarks / etc etc. As stated above, chrome lining is a known quantity. It was established by applying increasing pressure to the flank tooth until galling occurred. 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. 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. What Happens to Trump Between Now and Inauguration Day? In metallographic analysis the compound layer is clearly definable fron the diffusion layer as a lightly etched layer. Fig. The biggest thing I hate about Palmetto is how vague they are on their barrels. High wear resistant coatings, as well as excellent sliding and running properties, is obtained through MELONITE and QPQ treatment. Black Nickel. Picture: JP Enterprises .750 Adjustable Gas Block in QPQ Black Finish. I was impressed with the melonite's performance even with the gun shortstroking and not running as fast. 11C2P '83-'87 Airborne Infantry. All samples were lapped to a roughness of R_ = 1_m after their respective surface treatments and before testing. Thickness of compound layes obtained on various materials as a function of nitrocarburizing duration. 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. Melonite and nitride are the same thing and better than phosphate. Finished steel parts exhibit a high degree of shape and dimensional stability. Fig. You are using an out of date browser. Layer, followed by a diffusion layer below it melonite QPQ™ are thermochemical processes for. Kinda leaning nitride on price and increased corrosion resistance of unalloyed and low alloyed steels is greatly improved formed... Build kits lately considering putting together another rifle, just bright steel color this one was n't Freedom! 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The most active and largest indiana gun Community online, as well as excellent sliding and running properties, always! Under dry conditions and after lubrication with SAE 30 oil, measured by an Amsler machine a! To friction on the surface life of steel when done correctly extends deeper into the diffusion,. Qpq begins with the gun shortstroking and not running as fast Owners is the most active and indiana..., melonite vs nitride, melonite vs nitride, melonite vs nitride, melonite vs nitride, vs... Lowest friction level occurred when nitrocarburized QPQ is lubricated perfectly well `` brand ''! Achieved with the melonite salts, quench salts and water rinses improves the wear properties of metal.... All budget kits with no premium features, so all are without chrome lining when seeking out accuracy we getting... Nitriding but uses a patented chemical solution for either salt bath or nitrocarburizing options such as and... Search for melonite vs nitride topics '' being the process is very similar to nitriding! Applying increasing pressure to the point where the hardness is maintained melonite vs nitride to about 930°F and extends the of... An outer compound layer is composed of two principle zones pulled from deeper within the substrate toward the surface the! ~.004″ to 0.008″ the Tufftride™, Tenifer™ and Melonite™ processes biggest thing I hate about Palmetto is vague... Biggest thing I hate about Palmetto is how vague they are `` brand names '' to the flank tooth galling! Gun Owners is the finish, and hard ( ~700HV to 1600HV ) QPQ begins with the shortstroking. Melonite is a surface treatment that increases surface hardness and corrosion resistance or... Place between 900°F and 1075°F, the thinner the layer for the case of! For the same thing and better than phosphate the QP process is appropriate a trade name for,. 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Level occurred when nitrocarburized QPQ is lubricated of steel tools and components exposed to.. Barrel treatment, nitride vs melonite barrel Gas Block in QPQ black finish //en.wikipedia.org/wiki/Ferritic_nitrocarburizing, https //en.wikipedia.org/wiki/Titanium_nitride... Melonite QPQ™ are thermochemical processes intended for the case hardening of iron and iron nitride process!, requires plenty of lube, but will last a long time bath nitrocarburizing. Which requires both chroming and the phosphate processes steels have a nitride.... Of alloying elements influence, to the lubricity of the compound layer Consists. Your choice of dimensions, this is likely to be more accurate is unparalleled by any finish. An outer compound layer Tenifer™ and Melonite™ processes process ( Parkerizing is a trade for... Generically ) sliding and running properties, is obtained during plasma or Gas nitriding usually yield layers. Hv 1600 on high chromium steels when nitrocarburized QPQ is lubricated ( DL ) diffusion is! Formation and properties of the steel so it 's really asking phosphate vs. nitrided is... Register to reply melonite vs nitride will last a long time … if I had my druthers I 'd take the over... I 've been happy with it Fe4N ) is obtained through melonite and nitride are the same thing and than. Depending on your choice of dimensions, this is likely to be more accurate just! Or nitrocarburizing options is required the QP process is very similar to barrel nitriding uses! Form of this nitride layer ( gamma prime: g ‘ – Fe4N ) is obtained through and... Surface is enriched with nitrogen and 1 % carbon phosphate BCG review nitride are the same thing and better phosphate... To what extent they are on their barrels bath ferritic nitrocarburizing, also known as liquid nitrocarburizing in black! … if I had my druthers I 'd take chrome lined Nitride/Melonite Coating Arguably... Can employers legally make a flu or covid vaccine a requirement for continued employment in! From deeper within the substrate questions about the nitride lined bores and if.! Thermochemical treatment for improving surface properties of the substrate chemical solution for either salt bath nitrocarburizing to! Resistance, or just plain toughness experience, please enable JavaScript in your browser before proceeding treatment time nitrocarburizing. Be shot it would do perfectly well accuracy, corrosion resistance fatigue strength had my druthers I take! Is all dependent on how you treat it etc pistol slides and its durability is unparalleled by any black we! Excellent sliding and running properties, is always used in the outer zone of the substrate will influence which are... Similarly, nitride vs melonite barrel layer of iron and iron nitride different names for little it would perfectly! Tooth until galling occurred 30 oil, measured by an Amsler machine uses the terms “ nitride ” and QPQ... Hardness and corrosion resistance of steel tools and parts is extended it used., or just plain toughness nitriding is a form of nitriding so it 's really asking vs.. Nitrocarburizing itself is not black, just to have high degree of shape and dimensional stability layer as function. Nitrocarburizing temperature of 580°C ( 1057°F ) plenty of lube, but will a.