GB/T 9450-2005 Translated English of Chinese Standard. (GBT 9450-2005, GB/T9450-2005, GBT9450-2005): Steels - Determination and verification of the depth of carburized and hardened cases

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https://www.chinesestandard.net, Oct 28, 2014 - Technology & Engineering - 10 pages
This standard specifies the meaning and determination of steel-parts carburizing and carbonitriding hardened-case depth. This standard is applicable to carburizing and carbonitriding hardened layer; and the parts that, when they are final-heat-treated, have a hardness of less than 450 HV at a distance of three times the case-hardened depth, from the surface. For steel-parts that can not meet the above conditions, it shall be determined in accordance with a special agreement. For steel-parts of which, at a distance of three times the hardened-case depth from the surface, the hardness is greater than 450 HV, this standard is still valid, provided that a limiting hardness value that is greater than 550 HV (in steps of 25HV) is selected for the case-hardened depth.
 

Contents

Foreword
3
Scope
5
General
6
Verification of hardenedcase depth
8
Test report
10

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