My company has begun attempting to perform prior austenitic grain size evaluations. I am attempting to use the Mcquaid-Ehn process but am having difficulty getting the PAGs to show upon etching. I'm typically working with very low P+S 4140 or 4340 that has been quench and tempered to produce a...
Basically, we have some fully machined bolting inserts (7+'' O.D.)that are made from 4340 and were normalized, quenched and tempered, prior to machining. We sent these inserts out to get phosphated.
When the inserts were returned, there were light gray bands along the body, of varying diameter...
I need to make a decision for a material to be used as a stand to hold studs and bolts while they are being roll threaded. The material would need to be at <28 HRC and reasonably wear resistant. The bolts and studs will be continually rolling over the surface which is where the need for wear...
I am looking to improve the wear life of some forging dies used at my manufacturing plant. The dies are made of H13 tool steel. I have very little experience with case hardening via chemical absorption and I just wanted to know if anyone had any tips on what I should take into consideration when...
