【摘要】 探讨了Ｔ８Ａ钢薄层硬化工艺及硬化层深度对多冲接触疲劳抗力的影响。结果表明，硬化层深度对多冲接触疲劳抗力有明显影响。经薄层硬化的Ｔ８Ａ钢，可以获得较好的多冲接触疲劳抗力，故有可能作为凿岩机活塞用材。更多还原

【Abstract】 This paper probed the shallow hardening treatment for steel T8A and the influence of hardening depth on the contact-fatigue resistance to the repeated -impact -load-test.The results showed that the hardening depth influenced obviously on the repeated-impact-load-test. Through the shallow hardening treatment,the steel T8A can have better contact-fatigue resistance to the repeatedimpactload-test and can be used for making the piston of rock drill.更多还原