CrMoV合金堆焊层组织结构及抗冲蚀磨损性能研究

赵建华, 赵占西,陈晓亮,陆 晓,周 翔,纪秀林

振动与冲击 ›› 2015, Vol. 34 ›› Issue (10) : 111-114.

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振动与冲击 ›› 2015, Vol. 34 ›› Issue (10) : 111-114.
论文

CrMoV合金堆焊层组织结构及抗冲蚀磨损性能研究

  • 赵建华, 赵占西,陈晓亮,陆  晓,周  翔,纪秀林
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Microstructure and erosion wear properties of CrMoV alloying coating

  • ZHAO Jian-hua,ZHAO Zhan-xi,CHEN Xiao-liang,LU Xiao,ZHOU Xiang,JI Xiu-lin
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摘要

采用手工电弧焊工艺在20钢基体表面制备CrMoV合金堆焊层进行相组成、显微组织、耐冲蚀磨损性能及冲蚀磨损机理研究。结果表明,堆焊层数增加母材稀释率减小,堆焊层显微组织主要为马氏体、残余奥氏体及合金碳化物。第二、三堆焊层显微硬度最高,堆焊层平均显微硬度达780 HV,为基体硬度的4倍多。在所有冲蚀角度范围内,CrMoV合金堆焊层耐泥沙冲蚀磨损性能优于20钢;冲蚀角度小于30°时冲蚀磨损机制以微切削为主,大于30°时以疲劳损伤及局部塑性变形为主;砂粒粒径增加,堆焊层及20钢的冲蚀磨损率均有所增加,但不与粒径的增加值成正比。

Abstract

CrMoV surfacing coatings were deposited on the 20 steel substrates using shielded metal arc welding.The microstructure, erosion resistance and erosion mechanism of CrMoV coatings were studied. With the increasing of surfacing layer, dilution rate of parent material decreasing, the microstructure of surfacing layer consisted of martensite, residual austenite and alloy carbides. The highest hardness of the surfacing alloy exists on the second, third layer. The average micro-hardness of the surfacing layers is 780HV, which is more than 4 times of the matrix one. The erosion wear tests show that the CrMoV coating obviously has better erosion resistance than the substrate. The erosion wear mechanism of CrMoV coating is mainly micro-cutting at small impact angle and mainly fatigue damage, local plastic deformation at large impact angle. The erosion rate of surface coating increased with the increasing particle size, but was not directly proportional to the particle size.

关键词

CrMoV堆焊层 / 冲蚀磨损 / 显微组织 / 冲蚀角度

Key words

CrMoV surfacing layer / erosion wear / microstructure / impact angle

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赵建华, 赵占西,陈晓亮,陆 晓,周 翔,纪秀林. CrMoV合金堆焊层组织结构及抗冲蚀磨损性能研究[J]. 振动与冲击, 2015, 34(10): 111-114
ZHAO Jian-hua,ZHAO Zhan-xi,CHEN Xiao-liang,LU Xiao,ZHOU Xiang,JI Xiu-lin. Microstructure and erosion wear properties of CrMoV alloying coating[J]. Journal of Vibration and Shock, 2015, 34(10): 111-114

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