摘要
通过高应力三体磨料磨损试验,对比研究Al_2O_3陶瓷增强高锰钢基复合材料和高锰钢的耐磨性能,采用SEM观察磨损试样的微观磨损形貌,并通过测试磨损试样亚表层显微硬度研究材料磨损硬化程度。研究结果表明,本试验条件下Al_2O_3颗粒增强高锰钢基复合材料中陶瓷颗粒与高锰钢基体没有成分过渡,界面处无明显裂缝,说明试样中虽然没有形成冶金结合,但是机械咬合紧密。高应力三体磨料磨损试验中,在3 kg和5 kg两种不同载荷下,Al_2O_3颗粒增强高锰钢基复合材料耐磨性优于高锰钢的耐磨性,而且随着磨损时间的延长,复合材料的相对耐磨性不断提高。在3 kg载荷120 min磨损条件下复合材料的相对耐磨性是高锰钢的1.39倍,在5 kg载荷120 min磨损条件下复合材料的相对耐磨性是高锰钢的1.27倍,可见较低载荷下Al_2O_3颗粒增强高锰钢基复合材料相对耐磨性较高。亚表层显微硬度测试表明,高锰钢和Al_2O_3颗粒增强高锰钢基复合材料在相同磨损时间下,5 kg载荷下的磨损硬化效果高于3 kg载荷下的磨损硬化效果。同时,纯高锰钢的磨损硬化硬度值最高可达到HV 580,而复合材料在较高载荷下由于陶瓷颗粒的保护,其高锰钢基体磨损硬化效果没有纯高锰钢明显。
By the means of 3 body high stress abrasive wear tests, and worn surface microscopic morphology observation via SEM, the wear resistance of high manganese steel and Al2O3 ceramic reinforce high manganese steel was contrasted. The wear hardening of two kinds of materials was researched by testing the sub-surface micro-hardness. The research results show that there are not composition transition and obvious cracks in the bonding interface between the Al2O3 ceramic particles and high manganese steel base in the composite material, which shows that there are not metallurgical bonding, and the mechanical joint is tight. Under the 3 kg or 5 kg load, the wear resistance of Al2O3 ceramic reinforce high manganese steel is superior to that of high manganese steel, and with the wear time prolonging, the wear resistance of composite material improves continually. When 3 kg load was applied on specimens, and specimens were worn 120 min, the relative wear resistance of composite material is 1.39 times as much as that of high manganese steel. With 5 kg load and 120 min wear time applied on specimens, the relative wear resistance of composite material is 1.27 times as much as that of high manganese steel. Thus under lower load, the relative wear resistance of the composite material is better. The research results show that under the same wear time, the wear hardening effect of the high manganese steel and Al2O3 ceramic reinforce high manganese steel under 5 kg load is better than that under 3 kg load. After wear hardening, the maximum hardness of high manganese steel can reach HV 580. When higher load was applied, the wear hardening effect of high manganese steel is obviously better than that of the high manganese steel base in composite material, as a result of the protection from ceramic particles in composite material.
出处
《铸造》
CAS
CSCD
北大核心
2017年第5期476-480,共5页
Foundry
基金
广东省科技计划项目(2013B090500106
2013B090200033
2014YT02C036
2014B090901034)
关键词
复合材料
高锰钢
Al2O3陶瓷增强
耐磨性
composite material
high manganese steel
Al2O3 ceramic reinforcement
wear resistance
