5. Above you can see some example pictures of the colour shades that can be achieved with this techniques.Have fun doing it! Your container should be relatively larger than your object. I had to sand and restain the stock, and sanded the barrel from 120 down to 400 grit the pitting was so bad. Always back your paper when youre polishing over edges and up against features. 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. Participated in the Explore Science Contest. Salts. on Introduction. Also thanks DG! If your barrel has heavier pitting, now were into filing to remove pitting, and thats something I cant teach people in mere text. Its nice when something can be re-used a time or two, especially when used in diversified ways. Its essential to keep stirring the tank to prevent the forming of hot and cold areas. Be careful since considerable heat might be generated in the process. For hazzalandy: carbon content has nothing to do with the color process, it is only the temperature you heat to, and to a lesser extent, the time spent hot. Cooking off the more volatile hydrocarbons leaving the heavier ones produces a different effect yet again. I dont have that much blueing to do in my shop, so I dont use hot salts. I use a pickling paste. Check out the video:https://hackaday.io/project/21947-makers-vise/log/60914-coloring-steel-with-magnetism. Ill detail why. That would be a hot salt blueing mix. For more information on using a blowtorch and protecting the steel, scroll down! I like 1.5 wide shop cloth myself). I have always wondered about storage in gun soft cases or the foamed Hard cases, and humid or dry, heat and cold. Also: Do not allow the solution to run, drip or sag. (meaning oxygen atoms are able to attach themselves to the outer layer of the steel)We did this with an electromagnet! You need to adjust the boiling point of the salts for your altitude. Dont leave cold blue solutions around anywhere pets or kids could get at them. FigureLLC. Bluing, being a chemical conversion coating, is not as robust against wear and corrosion resistance as plated coatings, and is typically no thicker than 2.5 micrometres (0.0001 inches). ", informative and did not use technical language and concepts that would have left me floundering and none the wiser. Steps to Hot Blue Steel with a Torch The reason why blued guns rust is that something was allowed to attack the surface blueing and get through it to new steel or the blueing job wasnt deep enough to complete passivate the surface from red rust. This is often achieved without chemicals by simply heating the steel until a blue oxide film appears. Spray down the whole barreled action with copious amounts of WD-40, inside and out. It had been thoroughly degreased before my first attempt, but in trying to repair a poor result, I apparently contaminated it a bit. Old school smiths use something called washing soda to strip oil off guns. Just remove the blue/rust, degrease, dry, then blue/card/boil-out/oil/drain. Shooting Mystery is reader-supported. 6 years ago. Thermometers and stirring tools are also needed, as well as something to heat up the tanks. The de-greasing you do directly affects the uniformity of the browning or blueing. 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. it takes a long time to heat up a long (ie barreled action length) tank that is, oh, three barrels wide. "url": "https://shootingmystery.com/wp-content/uploads/2021/01/How-to-Blue-Stainless-Steel-in-5-Easy-Steps.jpg" Are you sure you want to heat the steel to 700F in that early step? Itll take perhaps 20 minutes to really dry down. I believe the change of color is due to a growing thickness of an oxide layer. occasionally I'll buff it afterwards. Knowledge is the power and fear is the opposite of power it cripples the mind and the body and almost always guarantee's a poor decision will be made. Colour case hardening occurs when soft steels were packed in a reasonably airtight crucible in a mixture of charred leather, bone charcoal and wood charcoal. 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 If you dont drain the barrel or action recesses properly before putting a barrel or action into a hot salt tank, then you will find out in a hell of a hurry as the water flashes to steam under the surface and again, splatters hot, highly caustic lye/nitrite salts all over you and your shop. Bluing is a process usually used by gun owners and firearms manufacturers to improve the aesthetic value of their weapons. The parts can often be put together with little or no forces need and friction lock together and the one parts shrinks and the other part expands. While still hot and while wearing rubber gloves rub the bluing compound Into the steel with the steel wool. WebStep 1: Preparing Your Materials You will need: -2x containers (one of them preferably being metal for the oil) -oil -unleaded petrol/Acetone/Terpentine/Rubbing alcohol or any good Bluing is a passivation process in which steel is partially protected against rust using a black oxide coating. The downsides are: the safety issue, which I laid out above, and which youve made clear. I have to finish my M76 and Galil first and buy the materials. 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. List Price: $18.64 $18.64. If you drop a piece of paper in there, or hydrocarbon compounds (like oil or grease on your part). 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. When youre using hot blueing salts, youd better be on top of your game, or you can seriously injure yourself. Heat the gun parts. Fe3O4 requires chemicals and/or heat to push the iron to full oxidation. "name": "Shooting Mystery", You want to be in the range of 600 to 650F. If you need to use a blow torch, focus the flame tip on the area you want hardened. Bluing only works on steel, cast iron, or stainless steel parts for protecting against corrosion because it changes iron into Fe3O4; it does not work on non-ferrous material. It is one smoooooth profile, from one end to the other. Brownells has a product that will strip blueing and rust (Fe3O4 and Fe3O2, respectively) and not corrode the underlying steel.Remove the barrel & action from the stock. Similarly, stainless steel parts may be immersed in a mixture of nitrates and chromates, similarly heated. Do NOT wipe/touch your metal with anything after degreasing as the whole purpose of cleaning was then for nothing. 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. Take them out after a couple of minutes and then wipe them clean to remove excess oil. just fyi, the old school method of case hardening steel is to get the piece so hot that a magnet will no longet stick to it and quickly quench it in used motor oil. Think big scars. You work on nice guns! The difference is immersion in boiling water for bluing. Its for mild steel, which must be greased, oiled or otherwise coated with something to stop it from rusting almost immediately. on Introduction, Hello my name is Joe and Im doing a project where Im trying to achieve the same outcome. You can make a Caustic Soda KNO3 water bath: 65% Lye (aka sodium hydroxide) Once it's cooled down, take the object out of the oil and place it on a piece of paper/cloth and let it set for about 20 minutes. You need to constantly be adding in a bit of water to bring the boiling point back down into the range you need. If you tempered the steel with a blow torch, set the metal on an anvil or another large steel surface to conduct the heat. the cost of the burners or heaters to heat up all these tanks really only practical if you have natural gas available "https://www.pinterest.com/theshootingmystery/", Once the solution reaches its boiling point, turn down the burner to about one-third of the boiling temperature and let it stay there. However, the chemicals from the bluing process can accomplish uneven staining on aluminium and polymer parts. If you look at the temps that Tenifur(SP) and Melonite(sp) and early Pakerizing processes used this is nothing. 84 or Du-Lite 3-0. Glad that there are folks like you around. Accidental exposure to the chemicals could result in serious injuries. Because so many people are trying to do this sort of thing on the cheap, thats when I start thundering in my warnings about safety. If cold bluing is the only practical option, the area should be kept oiled to extend the life of the coating as much as possible. RF: Expect a write-up from me on Rust blueing and parkerizing in the next couple of weeks. That surface rust on the barrel could be polished off easily. Dang it all. An ideal temperature is 180 degrees Fahrenheit but it also depends on the manual. This process leaves a deep blue-black finish. At the end of this heating process the crucible is removed from the oven and positioned over a bath of water with air forced through a perforated coil in the bottom of the bath. Heres instructions from Mark Lee Supplies on using their Express Blue #1. (You say the rod was heated, but it couldn't have been, as it was on the inside. Get it Feb 25 - 27. It is always essential to remove all oils from metals you want to blue, even if the cold blueing solution claims you dont need to do so. To shrink, I assumed you heated the steel plate only, to expand the hole in it. Black oxide provides minimal protection against corrosion, unless also treated with a water-displacing oil to reduce wetting and galvanic action. Polish to at least 400 grit. On this Wikipedia the language links are at the top of the page across from the article title. ", https://mgs.edu/making-chisels-skips-newsletter/, http://www.technologystudent.com/equip1/heat1.htm. Let them cool down as you take a closer look at the bluing effect. Heating up a tank on the kitchen stove. Ventilation is important. One can generally use the same solution to brown as to blue. Then you sight down the barrel and you see dips and waves in the barrel profile. "https://www.youtube.com/channel/UC6dwEQfHK1tk_ZeaA4PniOA/", Thats one way to get dyspeptic to write articles!

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