russa2
18th February 2009, 04:53 PM
I have a customer requirement to have an effective case depth of .508mm MIN. How do I measure this?
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View Full Version : Effective case depth of .508mm MIN. How do I measure this? Stijloor 18th February 2009, 04:54 PM I have a customer requirement to have an effective case depth of .508mm MIN. How do I measure this? What process are you referring to? Case hardening? Stijloor. russa2 18th February 2009, 05:05 PM What process are you referring to? Case hardening? Stijloor. Here is how it is spelled out on the print. Carburizing per SHAES174 Class CZ2 Surface hardness: HR15N 89/93 Effective case depth .508mm MIN. Stijloor 18th February 2009, 05:50 PM Here is how it is spelled out on the print. Carburizing per SHAES174 Class CZ2 Surface hardness: HR15N 89/93 Effective case depth .508mm MIN. I am not a metallurgist, but this document (http://www.sae.org/technical/standards/J423_199802) describes various methods. Any Covers have experience with this? Stijloor. Kevin H 18th February 2009, 06:14 PM HR 15N is the Rockwell superficial hardness test with a brale indenter and a 15kg load. You can measure carburizing case depth by mounting a metallographic sample from a coupon included with the load being carburized (or from a part) and polishing & etching the mount to visually examine the depth of carbon penetration under a metallographic microscope at 100 x magnification. You can also measure by mounting a section from a part or a test coupon and running microhardness tests such as vickers or knoop from the edge in towards the center of the sample to determine when hardness drops off and estimate case depth that way. |
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