时效处理对WC/Cu-Ni-Mn堆焊层耐磨损性能影响  

Influence of age-hardening treatment on anti-wear performance of WC/Cu-Ni-Mn hardfacing coatings

作　　者：夏卫生[1] 孟学伟 杨荣国 杨帅 桂赤斌 XIA Weisheng;MENG Xuewei;YANG Rongguo;YANG Shuai;GUI Chibin(State Key Laboratory of Materials Processing and Die&Mould Technology,Huazhong University of Science and Technology,Wuhan 430074,China;R&D Center,Shanxi North Machine-Building Co.,Ltd.,Taiyuan 030009,China)

机构地区：[1]华中科技大学材料成形与模具技术国家重点实验室,武汉430074 [2]山西北方机械制造有限责任公司研发中心,太原030009

出　　处：《焊接学报》2019年第1期59-64,163,共7页Transactions of The China Welding Institution

基　　金：武汉市应用基础研究计划项目(2017010201010125)

摘　　要：通过对比未时效与时效后WC/Cu-Ni-Mn堆焊层的微观组织、界面及耐磨损性能,研究时效处理对其耐磨损性能的影响规律,并揭示其耐磨损机理.结果表明,未时效和时效后的WC/Cu-Ni-Mn涂层相对耐磨损性能分别是时效后Cu-Ni-Mn基体的170.72和210.77倍,时效后涂层耐磨性能提升了23.5%;时效处理后Cu-Ni-Mn金属基中析出了NiMn第二相,基体硬度提升了2.3倍,从而为WC颗粒增强相提供了更稳定支撑;而未时效的Cu-NiMn合金中Ni,Mn原子固溶到Cu晶格,形成了一种α-Cu固溶体;未时效和时效后WC/Cu-Ni-Mn的主要磨损机理均为磨粒磨损和黏着磨损.The microstructure,interface and anti-wear performance of WC/Cu-Ni-Mn hardfacing coatings with and without age-hardening were compared and analyzed.The influence of the aging treatment on the anti-wear performance and wear mechanisms of WC/Cu-Ni-Mn coatings were investigated.The results showed that relative wear-resistances of WC/Cu-Ni-Mn hardfacing coatings with and without agehardening treatment were 170.72 and 210.77 times as much as the aged Cu-Ni-Mn matrix,which increased by 23.5%.After aging,the NiMn phase precipitated in the Cu-Ni-Mn alloy and its hardness increased by 2.3 times.As for the Cu-Ni-Mn metal matrix without the age-hardening,the elements of Ni and Mn dissolved in copper and then formed theα-Cu solid solutions.The main wear mechanisms of coating with and without age-hardening were adhesion and abrasion.

关 键 词：铜镍锰金属基 碳化钨增强耐磨堆焊层 时效处理 耐磨损性能 磨损机理 

分 类 号：TG455[金属学及工艺—焊接]