Chromium 3.27
Carbon 0.41
Molybdenmum 0.96
Manganese 0.54
Ni .22, Si .21, V .19, Cu .25, Al .02
Remainder is iron
What is this grade? I have looked through all my referrence books, no luck with the chromium content.
Thanks in advance
I agree with everything that is said above. Here are my comments, I hope they help.
Are the parts as straight before heat treat as they have been in the past?
If these are induction hardened on centers vertically, make sure the top one is free floating. I have seen when these fail or are...
Alphatizing, developed in the US prior to 1964, is a type of Chromizing. Google (and other) searches come up with a lot of foreign language hits which are no help to me. Does anybody alphatize or hard chromize in the states? This is NOT hard chrome plating, but rather a diffusion process...
It's worth a try. The more nitrogen in the case, the less response to temper, if there's a lot, then they will still be brittle after 1100°F. But you won't know unless yo try.
Shot peening prior to carburizing changes the texture of the surface, since the material is soft. On aerospace 9310, the carburizing depth can be specified with little tolerance, say +-.0025". The texture takes up some of that tolerance.
If you are asking about reprocess, then the "dimpling"...
There are subtle microstructural differences when comparing salt bath vs vacuum heat treated for HSS(M2). My experience is from the late 80's, and both vac heating/quenching, and the nature of common HSS has changed since then. For instance, p/m HSS is fairly common, leading to more...
What type of Fire Extinguishers do Heat Treaters typically have on hand? I have seen ABC dry chem, halon, and CO2 at various places I have worked. I note that ABC dry chem puts the fire out, but that the fire relights, like a joke birthday candle, the stream of extinguishing dust is stopped...
To your original question--the air quenching may not be sufficient to get a hardening effect, unless you use clean compressed air, which might work, thin section have been hardened this way. Be careful.
Oil quenching--I have had good experience oil quenching 1045, even though 1045 is...
The cost of commercial heat treating is based on what the market will bear. Despite this, you can come to an understanding of your costs. Some jobs make hay, others are just barely worth doing.
For a given profit center, like the nitriding line or the carburizing line, etc, add up all the...
Njmetallist: I have had some 1022B (kinda like 1018) pins boronized, then I hardened and tempered them. No metallurgical results yet. I haven't tried the 7140. Thank you for your response.
I want what everyone wants: Increased strength, increased wear strength, high toughness, and low cost.
I liked the structure I described earlier, I believe it will produce very good wear strength with no sacrifice to toughness, fatigue, or UTS.
I was unable to open the website, what is the...
