锻压技术

50钢精冲剪切面磨料磨损性能的实验研究

英文标题：Experimental research on wear resistance of fine blanking shearing surface for 50 steel

作者：张缓缓董吉洪李威

关键词：精冲剪切面磨损性能尺寸效应

分类号：

出版年,卷(期):页码：2015,40(7):107-112

摘要：

精冲件质量的好坏直接影响着其实际应用，而剪切面的耐磨性则是衡量精冲件质量的主要内容之一。通过改变不同的实验条件完成了非精冲件和精冲件磨料磨损实验，分析了各参数对其磨损量的影响规律，并利用电子扫描显微镜观察了试样的磨损表面形貌，揭示了磨损机理。分析表明：载荷和磨粒尺寸对零件的磨损量有重要影响，且相同条件下，精冲件的耐磨损性能要优于非精冲件；非精冲件出现了尺寸效应，而精冲件没有出现；在临界磨粒尺寸前后，非精冲件的磨损机理由犁皱为主转变为微切削为主，而精冲件的磨损机理一直以犁皱为主。

The quality of fine blanked parts affects its practical application directly, and wear resistance of the shearing surface is one of main important factors determining its quality. The abrasive wear tests of fine blanked parts and wire cutting parts were implemented under different experimental conditions, and influences of various parameters on wear loss were analyzed. Furthermore, the worn surface morphology was observed by a scanning electron microscope, and the wear mechanism was investigated. The results show that influences of load and abrasive size on wear loss are obvious, and the abrasive wear resistance of fine blanked parts is better than that of wire cutting parts under the same condition. Therefore, wire cutting parts has size effect, and fine blanked parts appears to be opposite. When the particle size is about the critical value, the wear mechanism of wire cutting parts changes from plough wrinkle into micro cutting, and that of fine blanked parts remains plough wrinkle.

基金项目：

张缓缓（1988-），男，硕士，研究实习员

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