通常渗碳钢都是根据心部和渗碳层的淬透性来选取,关于它的断裂抗力多限于采用摆锤式或悬臂梁式冲击试验,但它们均非判断断裂抗力的可靠方法。有的试图应用提高含镍量和提高残余奥氏体含量以改善这方面的特性,如本文所述,这两种途径均不能达到改善断裂抗力的目的。早期的论文曾介绍过某些代用的和标准的渗碳钢的冲击抗力、淬透性和热处理特性。此后,又发展了经过改进的试验方法以表征化学成份和工艺参数的变化对心部和渗碳层断裂抗力的影响。在最近的一些论文中已有部分报导,本文就一些初步研究结果按断裂 Usually, carburized steels are selected based on the hardenability of the heart and the carburized layer. The fracture resistance of the carburized steels is mostly limited to pendulum or cantilever impact tests, but none of them are reliable methods for judging the fracture resistance. Some attempts to improve nickel content and improve the retained austenite content to improve this aspect of the properties, as described herein, both ways can not achieve the purpose of improving the fracture resistance. Earlier papers have described the impact resistance, hardenability and heat treatment properties of some alternative and standard carburized steels. Since then, improved test methods have also been developed to characterize the effects of changes in chemical composition and process parameters on the fracture resistance of the heart and carburized layers. In some recent papers have been reported in part, this article on some preliminary findings by fracture