Sliding wear resistance and worn surface microstructure of nanostructured bainitic steel
- 作者：J. Yang ; T.S. Wang ; tswang@ysu.edu.cn ; B. Zhang ; F.C. Zhang
- 关键词：Sliding wear ; Steel ; Wear test ; Austempering ; Surface nanocrystallization
- 刊名：Wear
- 出版年：2012
- 期刊代码：183_00431648
- 类别：et
- 出版时间：5 April, 2012
- 卷：282-283
- 期：Complete
- 页码：81-84
- 文件大小：768 K
摘要
This research studied the effect of austempering temperature on the sliding wear resistance of high-Si-Al steel, with a nanostructured bainitic microstructure obtained by austempering, and compared it with a tempered martensitic microstructure obtained by tempering. Results show that the sliding wear resistance of the nanostructured bainitic microstructure increases as the austempering temperature is decreased from 260 to 220 掳C. The wear resistance of these austempered samples is 21-51%, greater than that of tempered ones, although austempered samples have a lower hardness than tempered ones. In addition, the worn surface microstructure of samples tempered and austempered at 240 掳C was also examined, indicating that the single-phase 伪 nanograins were formed in the worn surface of both samples. The mean size of nanograins, in the worn surface of samples austempered at 240 掳C, is less than that of the tempered ones.