本文是一个案例研究，围绕软化的基本原理和设计适用于硬车削钢小齿轮内径加工的微精加工工具的演变过程。该过程包括碳化硅和PCD作为用于改善表面结构的磨料。SEM照片和剖面数据支持研磨工具试验。

This paper is a case study surrounding fundamentals of softening and the evolutionary process of designing a micro finishing tool suitable for production finishing hard turned steel pinion I.D.'s. The process covers silicon carbide and PCD as abrasive used to improve surface structure. Abrasive tool tests are supported with SEM photographs and profile data.