A visit to our customer, and a few alterations to their machine parameters (to get things back to best practices) and the parts are back in-tolerance again, and die life back up to 30% of their peak. Still no word on the test samples, but I'm getting the feeling the problem has been process...
metengr,
Thank you for the reply. Early on in our troubleshooting, I did double-check our vendor certifications for die material, and our internal certs. We make hundreds of dies every day, and check every bar of material used in our tooling production for chemistry, grain structure, and...
Is it possible for mechanical properties of a single heat lot of 440 stainless to change over time? My company makes thread rolls, that cold-work a thread form onto the OD of a cylindrical blank. One of our customers has been experiencing a steady decline in roll life in the last 6 months, on a...
