Cr3C3/镍基合金等离子堆焊层的组织及耐磨性能
Microstructure and Wear Resistance of Cr3C2/ Ni Composite Coating Deposited by Plasma Transferred Arc Surfacing
摘 要
采用光学显微镜、扫描电镜、X射线衍射仪以及磨损试验机等,研究了加入不同量的Cr3C2对等离子堆焊镍基合金堆焊层组织和耐磨性能的影响.结果表明:纯镍基合金堆焊层组织主要是由γ(Ni,Fe)、CrB和M7(C,B)3等物相构成,且存在着明显的成分偏析;加入Cr3C2以后,合金层中出现了Cr3C2相,且使堆焊层枝晶破碎,组织变细,成分偏析减弱直至消失;Cr3C2颗粒的加入,提高了堆焊层的磨粒磨损性能,且随其加入量的增加,耐磨性逐渐提高;当加入量达到30%时,耐磨性最好,随后耐磨性开始降低.
Cr3C2
镍基合金
组织
耐磨性
plasma transferred arc (PTA)
Cr3C2
Ni-basel alloy
microstructure
wear resistance
Abstract
The nickel-based alloys with different Cr3C2 contents had been deposited by means of a plasma transferred arc (PTA) welding machine.The effects of Cr3C2 on the microstructure and wear resistance of the nickel-based alloy coatings were investigated using various techniques,including optical microscopy,SEM,XRD and dry sand abrasion test (DSAT).The Cr3C2-free nickel-based alloy coating is composed of γ(Ni,Fe),CrB and M7(C,B)3.The composition segregation exist in this coating.The addition of Cr3C2 particles led to the existing of Cr3C2 phase.The dendrites in the Cr3C2-free coating are broken,which led to the refinement of the Cr3C2-modified coatings.The addition of Cr3C2 particles led to the decreasing of the composition segregation till final disappearance.The wear resistance is improved because of the addition of Cr3C2 particles.The wear resistance increase with the increasing of Cr3C2 contents from 0% to 30%.However,further increasing its content led to the decreasing of the wear resistance.
中图分类号 TG455 TG456.2
所属栏目
基金项目 安徽省高校青年教师科研资助项目(2006jqt082)
收稿日期 2006/2/25
修改稿日期 2006/5/10
网络出版日期
作者单位点击查看
备注侯清宇(1973-),男,黑龙江巴彦人,讲师,硕士.
引用该论文: HOU Qing-yu,HE Yi-zhu,GAO Jia-sheng. Microstructure and Wear Resistance of Cr3C2/ Ni Composite Coating Deposited by Plasma Transferred Arc Surfacing[J]. Materials for mechancial engineering, 2007, 31(2): 53～56
侯清宇,何宜柱,高甲生. Cr3C3/镍基合金等离子堆焊层的组织及耐磨性能[J]. 机械工程材料, 2007, 31(2): 53～56
被引情况:
【1】李闪,胡建军,陈国清,周文龙,张俊善, "镍基合金等离子堆焊层的显微组织及摩擦磨损性能",机械工程材料 37, 72-77(2013)
【2】斯松华,于婉萍,张磊,李飞, "微米和纳米Cr3C2对Co40合金等离子堆焊层组织与性能的影响",机械工程材料 39, 94-97(2015)
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【3】何宜柱,斯松华,袁晓敏.等离子喷焊组织及性能试验研究[J].机械工程材料,2002,26(12):18-20.
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【10】张大伟,雷廷权,李福军,等.激光单道与多道熔覆Ni+Cr3C2复合涂层的组织及硬度[J].材料热处理学报,2001,22(3):23-27.
【11】侯清宇,高甲生.Co-Cr-W系等离子弧堆焊合金层显微结构的研究[J].稀有金属材料与工程,2004,33(11):1199-1202.
【12】段慧玲,高俊峰,张书勤.Cr3C2对激光熔覆Ni合金层组织和性能的影响[J].石油机械,1999,27(5):46-48.
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