ISO 2639-2002 钢.渗碳层和硬化层深度的测定和检验

标准号：ISO 2639-2002
中文标准名称：钢.渗碳层和硬化层深度的测定和检验
英文标准名称：Steels - Determination and verification of the depth of carburized and hardened cases
标准类型：H22
发布日期：1999/12/31 12:00:00
实施日期：1999/12/31 12:00:00
中国标准分类号：H22
国际标准分类号：77.040.10
适用范围：This International Standard defines the case-hardened depth, and specifies methods for the determination of this depth, in steel. It is applicable to a) carburized cases and carbonitrided cases; b) parts that, when heat treated to final hardness, have a hardness of less than 450 HV 1 at a distance of three times the case-hardened depth, from the surface. The case-hardened depth is defined by special agreement where these conditions are not met. For steels that, in the part under test, and at a distance of three times the case-hardened depth from the surface, present a hardness greater than 450 HV 1, the criterion can still be used, provided that a limiting hardness value greater than 550 HV 1 - in steps of 25 units - be selected for the case-hardened depth.