Drop a piece of hot charcoal in it and it will burn in the absence of any atmosphere as the nitrate provides the oxygen for the reaction. If you look at the temps that Tenifur(SP) and Melonite(sp) and early Pakerizing processes used this is nothing. You heat the outside member only when you do a shrink fit.). 99. It will instantly vaporize into steam and splash all over you. Bluing is often a hobbyist endeavor, and there are many methods of bluing, and continuing debates about the relative efficacy of each method. Bluing is a passivation process in which steel is partially protected against rust using a black oxide coating. I agree used oil works better and adding some copper and graphite seems to deepen the color and add more purple or plum to it. Add in the 250F+ temperatures of the salts when they hit your skin, and youre both burned thermally and chemically in seconds. Dont just leave them on a surface that could corrode or burn), get a new patch into the hemostats, soak, wring out, and keep going. Theres a reason I didnt pursue a career in chemistry. highfour, case hardening is a bit different from what you describe.. Usually, the steel needs some time in a medium that will allow carbon to penetrate the surface, and we are talking 15 minutes to several hours. Nowadays, even mild steel does have a certain amount of carbon in the alloy, which can explain your observations, if you google "super quench," you should find a waterbased quench that is rumoured to do the same, but in my humble opinion, water can do just that as well. Ok you gotta help me out herewhen I was studying mechanical engineering a good few years back a project I done involved using a compression fit of 1/4" thick plate steel into 1" thick steel rod, both mild steel. Referring to the post that started all of this; Dyspeptic Gunsmith says: So basically, youll want the rifle in the vise with the muzzle pointed to your left. Just dont. I heat treated a piece of carbon steel to make it less likely to wear (using its edge as a cutting surface in a wood turning application). Heres instructions from Mark Lee Supplies on using their Express Blue #1. Just let any residual matter evaporate/dry. WD-40, as mentioned earlier, is a water-displacing oil compound not a penetrating lube, and for preventing rust, WD-40 actually works pretty well, but it doesnt last like cosmoline or waxy oils used for long-term rust prevention. This process was repeated until the desired depth of color was achieved or the metal simply did not color further. This is not necessary as long as you can hold your item appropriately and not cover where it is to be heated. Theyll usually go in from the right, and be drifted out from the left (ie, drifting them from left to the right as the muzzle is pointed away from you). I really appreciate you taking the time to share it DG. Why do you bother with all this crap?. This signifies that the steel is tempered. The parts are then oiled and allowed to stand overnight. journeyman. I like 1.5 wide shop cloth myself). My apologies for the background noise in the first half of the video We had compressors running where I had to shoot this This video shows how to blue steel parts using an oven or torch and quenching in oil This method is not the professional method using bluing salts but can be done in your home with a torch or if you have access to a high temperature oven This method will provide your parts some protection from corrosion and show how to achieve different colors in the steel by varying temperatures I am not a professional so please spare me the that s not hot bluing and other criticisms If you don t like it turn it off Hope this comes in handy for someone, How to take apart disassemble and put together assemble a 1911 pistol 1st method, Stevens 20 Gauge Break Action Shotgun Project - Part 4 Cold Bluing with Brownells Oxpho-Blue Creme, Van's Instant Gun Bluing - Removing Gun Rust, Cold bluing Steel blackening How to use Tifoo Black Devil - burnishing steel, Gun Bluing - Colt Official Police 38 Special, Vintage Screwdriver Cold Bluing Br nierung Restore No 2, Slow rust bluing O1 knife blades part two, Easy and Fast bluing touch up Presto Gun Blue Pen, DuraBlue Spray-on Bluing Aerosol Application Process Polished Version, Axe Restoration Part Two Bluing With Birchwood Casey Superblue, Birchwood Casey Aluminum Black Super Blue and Metal Work on a Tanfoglio TA22S, Gun Bluing using cold blue and heat Weihrauch HW35 E Restoration, Perma Blue Gun Blue Paste Birchwood Casey. Hopefully these concepts suggest caution and diligence for what you are doing. High temperatures and dangerous chemicals mean that a moment of carelessness can make you pay a heavy price. Make sure the piece is chemically clean, sandblasting followed by power wire brushing is good then stop heating when you hit purple because the heat will travel. [ Sometimes at this point, I come just a fraction away from the heat to go through colours a bit slower. "Bluing" is the process of oxidizing steel to create a durable, corrosion-resistant layer. A Garden Gun Cultivates a Newfound Fascination, AZ Judge Dan Slayton Refuses to Reduce $2m Bail in Flagstaff Campus Self Defense Case, State Judge Issues Order Blocking Enforcement of Illinois Firearms Ban Act Statewide, Protecting and Serving: Springfield, IL Police Seized Homeowners Gun After Investigating Her Report of a Prowler UPDATED, Chicagos Failed Mayor Lori Lightfoot Loses in Reelection EffortBadly, http://www.lowes.com/pd_188198-316-HG-66420_0__?productId=4764059, http://cdn.spectrumbrands.com/~/media/Spectracide/Files/MSDS/SpectracideStumpRemoverGranulesSDSApr15.ashx. There are many methods you can use to blue the steel. Sorry for the misunderstanding. on Introduction, Hello my name is Joe and Im doing a project where Im trying to achieve the same outcome. Where/how did you think I got to the point I could make nice guns? They should send you a stipend for your time. Wipe them down with WD-40 on a regular basis. The mixed fumes of the acids produce a uniform rust on the surface of the parts (inside and out) in about 12 hours. You'll probably be fine following these instructions - you'll probably be OK driving home a little drunk, too. It is a difficult product to apply evenly, offers minimal protection and is generally best used for small fast repair jobs and touch-ups.[2][3]. Further, I probably would have used a coarser wet-dry to prep the raw steel (this was a kit Kentucky long rifle) rather than the 1500 grit I used. After that, slowly and steadily stir the solution in, Step 2: Process the components of the gun, Wait for 10 15 minutes and then take out the components. The parts must be observed constantly for colour change. Wear disposable nitrile gloves, work in adequate ventilation, bag and dispose of all rags/towels used in the process in their own bags, and quickly. Have proper ventilation and use proper modern safety gear! My dad keeps his in a big safe with large desiccant packs that he threw in there. You want to be in the range of 600 to 650F. Its nice when something can be re-used a time or two, especially when used in diversified ways. Wait for 10 15 minutes and then take out the components. Share it with us! Oil binds with the metal and prevent it from getting air/chemicals to corrode. You are nitre blueing here. The use of stainless steel alloy varies a lot from one manufacturer to the other and thats why the bluing effect wont always be consistent. Ive gotten hot blue salts on me splashed into my hair. I have to finish my M76 and Galil first and buy the materials. Did you make this project? I wasnt planning on doing it for a few months. - Ballachy", "Bluing of Steel by Heat Treatment: Why and How it Happens? Todos los derechos reservados. You can improve your results by doing two things: 1. It is one smoooooth profile, from one end to the other. Black iron wire You will need black iron wire to tie around any object you Blow torches only heat a small concentrated area. 2. Heat the gun parts. Its a good process, but it isnt a 1:1 replacement for blueing. If you have very light, fine pitting, you can polish this out. "Rust bluing" and "fume bluing" provide the best rust and corrosion resistance as the process continually converts any metal that is capable of rusting into magnetite (Fe3O4). I found through my bluing adventure that different oils do act slighty different but ultimately everything I've used has done the job. Include your email address to get a message when this question is answered. Safety is the number one priority so protect your body as much as possible. He started the site to explore the ethics, morality, business, politics, culture, technology, practice, strategy, dangers and fun of guns. | Alpha Detroit", "NRA Family | Gun Manufacturing: Browning vs. Bluing", http://mypeculiarnature.blogspot.com/2014/08/quick-rust-bluing-back-in-black.html, "Radio Kits and Designs for Old and New Styles", "Coating, Oxide, Black, for Ferrous Metals (MIL-DTL-13924D)", "Phosphate and black oxide coating of ferrous metals (MIL-HDBK-205A)", https://en.wikipedia.org/w/index.php?title=Bluing_(steel)&oldid=1142351288, Short description is different from Wikidata, Articles that may contain original research from October 2020, All articles that may contain original research, Articles needing additional references from October 2020, All articles needing additional references, Articles lacking in-text citations from September 2014, Articles with multiple maintenance issues, Articles with dead external links from July 2017, Articles with permanently dead external links, Creative Commons Attribution-ShareAlike License 3.0, This page was last edited on 1 March 2023, at 22:58. Now securely hold your piece with whatever you have chosen. Im not responsible for marital discord as a result of gun projects attempted on the kitchen stove. 1. polish it very well 2. clean very well 3. quick dip in dilute FeCl (4:1) is what I use 4. rinse in cold running water and pat Cold bluing is not particularly resistant to holster wear, nor does it provide a large degree of rust resistance. Hes claiming that method is more durable than Blue alone. Steps to Hot Blue Steel with a Torch You work on nice guns! Note that it has to be a different tank from the one you used for Step 2. This process is also the only process safely used to re-blue vintage shotguns. . Repeat 3 times. 6 years ago. Remember the oil is probably gonna release some smoke/fumes once the piece is quenched so as said before: please do this step in a well ventilated area. Add the two together and you have what is akin to rocket fuel in your face a way of oxidizing almost any organic material with insufficient water for cooling into a furious flame. . } Keep heating the steel until you notice a blue color form on the metal. Thermometers and stirring tools are also needed, as well as something to heat up the tanks. Many double-barreled shotguns are soft soldered (lead) or silver brazed together and many of the parts are attached by that method also. The cotton gloves insulate your fingers from the heated barrel, and they prevent oils from your skin from getting on the raw steel. That said, heres the truth: The best blueing you can have on a gun is simple, safe to do, but takes a long time. Youre just using stump remover to do it. I had to sand and restain the stock, and sanded the barrel from 120 down to 400 grit the pitting was so bad. Before you start, it might do you well to mark the sight base on each side of the dovetail with a Sharpie marker, so you can see when the sight begins to move. First, let us go through a couple of bluing concepts that you have to know in order to achieve the desired result. You might need two applications to clean up more deeply rusted spots. 2. Hot bluing should never be attempted on aluminium, as it reacts it usually dissolves in the caustic salt bath. This is one of the reasons rust and fume bluing are generally more rust-resistant than other methods. No one can even tell you what the heat treat is on a 1895 Mauser for instance yet we do not wet ourselves before we shoot one! Pour in some acetone, and while wearing rubber gloves (dishwashing gloves are OK), put in a pad of 0000 steel wool, swish it around and pull it out. Either that or the steel wool. You have entered an incorrect email address! It turns out I have. "width": "1500", But the article was very informative. Dont touch the metal with your bare hands since it could cause severe burns. Last Updated: May 13, 2022 {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/8\/81\/Harden-Steel-Step-1-Version-3.jpg\/v4-460px-Harden-Steel-Step-1-Version-3.jpg","bigUrl":"\/images\/thumb\/8\/81\/Harden-Steel-Step-1-Version-3.jpg\/aid1214287-v4-728px-Harden-Steel-Step-1-Version-3.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"

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\n<\/p><\/div>"}. The usual mistake on buffing wheels is using too coarse a compound, and then the wheel becomes quite aggressive in removing material. How to Blue Bluing Steel Using Oven Or Torch and Oil Method. It provides the stainless steel surface with a layer of protection, giving rust and corrosion resistance while reducing potential glare as well. Use your torch to bring up (Its Crystalline Potassium Nitrate 100%) $6.18 Higher carbon contents will take longer to heat. Depending on what solution you use, the tank temperature must be maintained somewhere between 240 and 310 degrees Fahrenheit. It is hazardous. 500F-600F is often all that is needed and the parts can be done over and over again you just have to clean between each attempt. Put all the components into the tank and wait for 5 15 minutes. All tip submissions are carefully reviewed before being published. Quenched steel is harder, but it becomes more brittle. } The cross section and size of parts affect the outcome of the finish and time it takes to achieve. I don't understand why you are submerging it in oil? This method must not be used on critically heat-treated parts such as receivers, slides or springs. This article was very, "I've been working with steel since I was a child, and reviewing these proper methods and skills makes my projects, "It surely educated me on several points. The differential cooling causes patterns of colors to appear as well as hardening the part. on Introduction, looks nice but you are using what is known as heat treatment which will darken steel, not using bluing salts as in gun bluing of rifle barrels all in all very nice instructable, Reply The plate turned blue just like you ible and I was told this was an effect of compression fitting.the rod didn't change colour even though it had the heat applied to it so was it actually the compression fit that changed the plates colour. To harden steel, start by heating the metal directly with a blow torch until it turns a cherry red color. http://cdn.spectrumbrands.com/~/media/Spectracide/Files/MSDS/SpectracideStumpRemoverGranulesSDSApr15.ashx. The potassium nitrate will liquefy at around this temperature and blue your items at a relatively quick speed. You then oil or wax over the finish when youre done. Here is a simple way to get a blued finish on steel. With HSS you're looking for 2500-3000rpm, M35 or M42 cobalt bits 3000-3600rpm, and carbide 10k-12krpm. The hotter the steel, the further the oxygen can diffuse through the oxide coating, so the coating builds thicker before it protects the steel from further oxidation. When the liquid stops bubbling, remove the metal from the container and wipe off any excess liquid. ALL RIGHTS RESERVED. Aluminium (Al) and polymer parts cannot be blued, and no corrosion protection is provided. My apologies for the background noise in the first half of the video We had compressors running where I Apply heat to your object and heat up gently and equally. Ill be buying the stainless tubs and chemicals to do it and go for as close to black as I can get. Heating will make the metal better in absorbing the bluing liquid. What did you use for polishing your pieces and Im guessing you polished then added the chemicals after?Thanks, Joe, Question In the automotive world this is a common practice. If you havent done it before, wait until I mention some items about it. It had been thoroughly degreased before my first attempt, but in trying to repair a poor result, I apparently contaminated it a bit. Ferrari installs valve seats in their aluminum cylinder heads via robot. Examples of this finish are common on older pocket watches whose hands exhibit what is called 'peacock blue', a rich iridescent blue. What I forgot to mention in all of this is a detail that seems mundane, but it critically important: Wear cotton gloves. The steel will pull some of the carbon out of the oil while quenching and harden the outer portion of the metal. "image": { Be patient in the first few minutes as the metal needs to reach the temperatures where it changes colour! When the first patch gets really funky, then drop that in your plastic garbage container (remember, these patches have been soaked in acid solutions! Im asking because theres a guy on YouTube recommending Brown Express first, then several layers of Blue over that. Life is good. "mainEntityOfPage": "https://shootingmystery.com/blue-stainless-steel-beginners/", You should keep guns in a safe, if you can. Wear thick gloves and a face mask before you quench your steel so the water or oil doesnt splash onto your hands. Many older browning and bluing formulas are based on corrosive solutions (necessary to cause metal to rust), and often contain cyanide or mercury salts solutions that are especially toxic to humans. This crucible was heated to 730C (1,350F) for up to 6hours (the longer the heat was applied the thicker the case hardening). You should put the brass drift (which you can make out of a piece of brass rod about 1/4 in diameter) on the sight base, and then start tapping the end of the drift with a small hammer. We use cookies to make wikiHow great. It cannot rust any further. I saw you reference a coleman stove and propane tank for heating solution. gas coverage is another big one. Safety is the number one priority so protect your body as much as possible. The loose oxide was then carded (scrubbed) off, using a carding brush - a wire brush with soft, thin (usually about 0.002in (0.051mm) thick) wires - or wheel. Glad that there are folks like you around. Ive used this method in a pinch to make a tap from a cheap mild steel bolt to chase out galled female threads. Cooking off the more volatile hydrocarbons leaving the heavier ones produces a different effect yet again. Very true. Once you get the colour you want, go outside to your oil container and fully quench your object into the oil! Reply Mea culpa. Ill go into parkerization later this week. "https://theshootingmystery.tumblr.com/", Then you pull it out and scrape off the oil along the blade edge. it takes a long time to heat up a long (ie barreled action length) tank that is, oh, three barrels wide. Now, using the information above, you should have little problem bluing your firearms on your own. $3.59. These work by depositing a coating of copper selenide on the surface. Blue Metal Shell 13 in 1 Welding Torch Nozzle Tip Cleaner For Welder Soldering. Tenifer get's up to (1077F) last I checked and was the 5th step in Glock heat treating after that they Pakerize it. The blue appearance of the oxide film is also used as an indication of temperature when tempering carbon steel after hardening, indicating a state of temper suitable for springs. 3. Now you can start.Apply heat to your object and heat up gently and equally. As I'm bluing round pieces I slowly and evenly rotate the piece over Stainless steel can only tolerate hot bluing and a limited amount of chemicals. "https://www.reddit.com/user/theshootingmystery" Its for mild steel, which must be greased, oiled or otherwise coated with something to stop it from rusting almost immediately. Keep a fire extinguisher near your workstation in case of a fire. Blacksmith products to this day may occasionally be found made from blued steel by traditional craftsmen in cultures and segments of society who use that technology either by necessity or choice.[5]. The inside barrel was saved by the fact it was so full of lead fouling. "@type": "ImageObject", "@type": "ImageObject", Safety notes: Dont use an aluminum pan. Fe3O4 requires chemicals and/or heat to push the iron to full oxidation. Central Texas. For the color change to be uniform you have to remove the grease, oil, paint etc or it looks blotchy. Bluing is most commonly used by gun manufacturers, gunsmiths, and gun owners to improve the cosmetic appearance of and provide a measure of corrosion resistance to their firearms. February 20, 2016 at 16:12. It is slightly caustic, so be careful you dont leave it on the gun for long. Theres nothing I see as super-dangerous about blueing other than trying to do hot salt blueing without all the correct safety equipment and precautions. I used Express Blue #1 on lots of guns, where I want something less labor intensive than slow rust blueing (which I wont describe here): most steel wool isnt oil-free. It would be a good idea to get some gloves on. It is also used by machinists, to protect and beautify tools made for their own use. I can see my wife walking in and shaking her headabout as vigorously as when I asked if I could use the dishwasher to clean some tools. The ideal setup is a pair of long sleeve gloves along with splash goggles and a face mask. Then, you can put the components back into the bluing tank and increase the temperature until you see the blued steel. Polish to at least 400 grit. Now you slide the cold rod in, and the plate cools, gripping the rod. The color is oxide, but I believe you can scrape it off. Any more advice is welcome SteelJunkee Joined May 6, 2018 Messages 891 Frequent TTAG commenter Dyspeptic Gunsmith saw the gun above in our postA Garden Gun Cultivates a Newfound Fascinationand answered reader questions about blueing/reblueing a gun thusly: If the rust is very fine and there is still substantial blueing left on the gun, you might want to strip the blueing. This answer was tested with a utility knife blade and it drilled through with ease. Seriously, this is interesting and thank you for posting it, but I hope to never be in a position where I need to use either of these techniques! For the chemical, the bluing solution should be either Oxynate No. Excellent info. The color is not oxides, when steel is heated at relatively low heats (300-600 degrees Fahrenheit) it changes colors from light yellow to a deep blue, after 600 it turns back to a steel color. That means 50-60 revolutions to make a foot. Also: Do not allow the solution to run, drip or sag. That way, you can still use your oven for the rest of the evening. 'Browning' is controlled red rust Fe2O3, and is also known as 'pluming' or 'plum brown'. occasionally I'll buff it afterwards. Once the solution reaches its boiling point, turn down the burner to about one-third of the boiling temperature and let it stay there. You can then use a soft brush to gently remove all the residue of the cleaning solution on the components. this produces better, less turbulant gas flow, which will reduce heat traces. How do I harden a steel hammer so that is lasts longer and is more durable? Thanks for the lesson, DG. Use it to try out great new products and services nationwide without paying full pricewine, food delivery, clothing and more. This works well for me. In colloquial use, thin coatings of black oxide are often termed 'gun bluing', while heavier coatings are termed 'black oxide'.

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