标 准 编 号：GB/T 9450-2005 简体中文标题：钢件渗碳淬火硬化层深度的测定和校核 繁体中文标题：钢件渗碳淬火硬化层深度的测定和校核 English Name：Steels-Determination and verification of the depth of carburized and hardened cases