氮合金化堆焊合金往复式摩擦磨损行为的研究  

Friction and Wear Behavior of Nitrogen-Alloying Hardfacing Alloy

作　　者：李嘉祺[1] 杨可[1] 王秋雨 冒志伟 徐亮 张可召 包晔峰[1] 蒋永锋[1] LI Jiaqi;YANG Ke;WANG Qiuyu;MAO Zhiwei;XU Liang;ZHANG Kezhao;BAO Yefeng;JIANG Yongfeng(College of Mechanical and Electrical Engineering,Hohai University,Jiangsu Changzhou 213022,China)

机构地区：[1]河海大学机电工程学院,江苏常州213022

出　　处：《摩擦学学报》2020年第5期586-592,共7页Tribology

基　　金：国家自然科学基金项目(51101050);中央高校基本科研业务费专项资金(2018B59714);常州市重点研发计划项目(CE20205046)资助。

摘　　要：在马氏体不锈钢中引入氮,通过铌、钛固氮制备氮合金化堆焊合金.利用往复式摩擦磨损试验机测试加氮和未加氮两种堆焊合金在不同载荷(5、10和15 N)下的摩擦磨损性能,研究了其摩擦磨损行为.结果表明:在摩擦磨损过程中,堆焊合金表面承受周期性载荷,摩擦表面出现明显的切削痕和塑性变形,其磨损机制以磨粒磨损和表面疲劳磨损为主.氮合金化堆焊合金中,碳氮化物沿马氏体基体、晶界弥散析出,起到了明显的细晶强化和弥散强化作用,增强了基体的塑性变形抗力以及抵御磨粒磨损的能力,使磨损表面切削痕数量更少、深度更浅,抗疲劳剥落现象得到明显改善.The nitrogen-alloying hardfacing alloy was prepared by substituting carbon atoms with nitrogen atoms and adding elements niobium and titanium. Its friction and wear properties under different loads(5, 10 and 15 N) were investigated. The results indicated the main wear mechanisms involved plastic deformation and material removal by micro-cutting and delamination. In addition, the depth and cross-sectional area of the wear scar on the worn surface were positively related to the load while the wear rate was negatively correlated with the load. The carbonitride particles with small size were not liable to detach and peel off from the matrix due to the strongly bond strength with the matrix,leading to low material remove because they are hard enough to bear the load. Moreover, large amount of fine-dispersed carbonitride particles effectively increased the hardness and strength of the matrix, refined the martensite matrix, and hence contributing to a better wear resistance. As a result, the wear of the matrix was reduced because of the restrained effect of the carbonitride particles to large-scale layered flaking by abrasives.

关 键 词：碳氮化物 堆焊合金 摩擦磨损行为 细晶强化 弥散强化 

分 类 号：TG442.3[金属学及工艺—焊接]