摘要
采用销-盘法研究了直径?3 mm Ti_(35)Zr_(30)Be_(24)Cu_(7.5)Co_(3.5)块体非晶合金及其经623 K和653 K退火1 h后的耐磨性,利用SEM分析了磨损形貌。结果表明,经磨损后,试样磨损面显微硬度略有提高,有加工硬化现象出现;623 K温度下退火1 h后,相组成与铸态同为非晶相,试样磨损以局部剪切的塑性流变为主,磨损机制为疲劳磨损;随着温度提高到653 K退火1 h后,合金由部分非晶相及纳米相组成,显微硬度突升到1 042 HV,磨损以碎片剥落及犁沟为主,磨损机制为磨粒磨损。
The abrasive wear behaviors of Ti35Zr30Be24Cu7.5Co3.5 bulk amorphous alloy with a diameter of 3.0 mm and the amorphous alloys annealed in 623 K and 653 K were investigated using pin-on-disc test. The worn surface morphologies were studied by SEM. The results show that the micro hardness of worn surface increase after worn because of work-hardening. The phase composition which is the same as that of the as-cast is made of amorphous phase after annealing at 623 K for 1 h. The worn surface morphologies mainly are plastic flow of localized shear and the abrasion mechanism of annealed amorphous alloy is fatigue wear. The micro hardness is suddenly increased from 687 HV to 1 042 HV with increasing annealing temperature to 653 K for 1 h. And the phases of alloy are consisted of amorphous phase and nano-crystalline phase. The worn surface morphologies mainly are debris peeling and furrows and the abrasion mechanism of annealed alloy at 653 K is abrasive wear.
出处
《铸造技术》
北大核心
2017年第11期2640-2642,共3页
Foundry Technology
基金
吉林化工学院资助项目(2015005)
关键词
块体非晶合金
退火
磨损机制
bulk amorphous alloy
annealing
abrasion mechanism
