1、引言存在于一些传统材料之间(尤其是钢与铸铁之间)的竞争以及出于对材料合理使用的考虑,导致设计者们利用合适的总体处理来明显地延长一些零件的使用寿命。对于珠光体铸铁各种表面处理,包括机械的(滚压,喷丸,……)、热处理的(感应加热淬火)和化学热处理的(渗氮),都能明显地改善零件的疲劳寿命,降低应力。在珠光体球铁最佳化过程中,可以看到 1. INTRODUCTION The competition that exists between some traditional materials, especially between steel and cast iron, and due to the rational use of materials led designers to significantly extend the useful life of some parts by using appropriate overall handling. For pearlite cast iron all kinds of surface treatment, including mechanical (rolling, shot peening, ...), heat treatment (induction heating quenching) and chemical heat treatment (nitriding), can significantly improve the fatigue life of parts, reduce stress. In pearlite ductile iron optimization process, you can see