apability of holding the defined limits at designated control locations. 产品设计的目的是使每级碳氮共渗得到中间值的渗层深度和在受控部位得到指定的性能Р4.3?SURFACE HARDNESS MEASUREMENT表面硬度测量Р4.3.1?General surface hardness requirements for carbonitrided parts are listed with the case depth class. Any special requirements will be defined on the part drawing.通常表面硬度碳氮共渗零件能得到列表中的硬化层深等级其他特殊的要求需要在工程图纸上进行定义Р4.3.2?Hardness measurements should be made on one or more surfaces considered significant to part operation or as defined on the Engineering drawing.应该选择一个或多个有效的重要加工面进行硬度测量或在工程图上进行定义Р4.3.3?Hardness measurement indents on finished surfaces used as bearing races are eptable for production parts. Evaluation must be made on nonproduction sample parts or surfaces before finishing. 有些零件如轴承座圈在精加工表面上测量硬度留下的凹痕一般是不允许的,所以硬度测量需要在精加工前在非生产零件的样件上进行
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