GB/T 9450-2005
AbolishedSteels-Determination and verification of the depth of carburized and hardened cases
钢件渗碳淬火硬化层深度的测定和校核
📋 Scope / 适用范围 ai_extracted
本标准规定了钢制零件渗碳及碳氮共渗淬火硬化层深度的含义及其测定方法。 本标准适用于渗碳和碳氮共渗淬火硬化层；并经最终热处理后，距表面3倍于淬火硬化层深度处硬 度值小于450HV的零件。 不能满足上述条件的钢件，应根据专门协议确定硬化层深度。 对于距表面3倍于淬硬层处硬度值高于450HV的钢件，本标准仍然有效，前提条件是选择硬度值 大于550HV（以25HV为一级）的某一特定值作为界限硬度。
📚 References & Relations / 引用与关联
normative_reference
GB/T 18449.
normative_reference
GB/T 4340.
🔗 Related Standards / 同类标准
GB/T 12603-1990
Classification and designation on metal heat treatment
GB/T 13324-1991
Terminology of heat treatment installation
GB/T 7232-1999
Terminology of metal heat treatment
GB/T 8121-2002
The terminology of technological materials for heattreatment
GB/T 21736-2008
Technical specifications of energy-saving combustion devices for heat treating
GB/T 16924-2008
Quenching and tempering of steel parts
GB/T 16923-2008
Normalizing and annealing of steel parts
GB/T 18177-2008
Gas nitriding of steel parts
Content extracted by AI. Not officially verified.