Wind Systems

Towers, turbines, gearboxes; processes for shaping and finishing component parts.

Laser Solutions

Cost-effective laser solutions for many manufacturing problems.

Essentials of Manufacturing

Information, coverage of important developments and expert commentary in manufacturing.

Machine Design

How-to, in-depth technical articles for machine design engineers

more free magazines
List Recent Topics | Start a New Topic

Message No. 22861, Started by Bob_3 on 02/20/19

I’m looking for some help with case hardened sheetmetal parts. We have some failed sheet metal parts – 1mm thick C-1018 steel – that have cracked in the corners, and I suspect a change in the process from a matte black Nitrotec (nitrocarburize) to some other hardening process may be the cause. The new process has a glossy almost painted like finish.

When I try to measure the surface hardness, I get readings all over the map from 15-55 Ra to 60-75 R15N. I’m familiar with the nitrocarburizing and case hardening, but other processes that impart this glossy finish is where I need some help, and have a couple questions.

Which processes impart that glossy finish, and what are the hardness characteristics (Rockwell, depth, etc.) of that finish? How best to measure the hardness – Rockwell 15N, Ra, or other? Does the finish affect the hardness reading at all?

Thanks Much...

Newbie to this forum. : )

Reply | Start a New Topic | List Recent Topics

Follow-up Messages (1)
No. 24488, Posted by Grace1412 on 01/27/20, 03:33 PST.