合金元素Ni/Al对45Si2MnCr2Mo超高强韧钢冲击磨料磨损行为的影响  

Effect of Alloying Elements Ni/Al on Impact Abrasive Wear Behavior of 45Si2MnCr2Mo Ultra-high Strength Steel

作　　者：杨明[1,2] 陈晓华 王自东[1,3] 王艳林[1] 左玲立 YANG Ming;CHEN Xiaohua;WANG Zidong;WANG Yanlin;ZUO Lingli(School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China;Beijing National Innovation of Lightweight Ltd.,Beijing 100083,China;State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]北京科技大学材料科学与工程学院,北京100083 [2]北京机科国创轻量化科学研究院有限公司,北京100083 [3]北京科技大学新金属材料国家重点实验室,北京100083

出　　处：《材料导报》2023年第13期177-184,共8页Materials Reports

基　　金：国家自然科学基金(52071012);中央引导地方科技发展资金基础研究(YDZX2021005)。

摘　　要：针对不同Ni/Al含量的强塑韧性良好的45Si2MnCr2Mo超高强韧钢,利用MLD-10冲击磨料磨损实验机对其进行了三体磨料磨损实验,系统研究了不同Ni/Al含量对超高强韧钢的磨损失重、硬化层深度以及磨损后表层及亚表层微观形貌的影响,并探讨了磨损机理。结果表明:Ni含量为3%时超高强韧钢的耐磨性最好,磨损百分比最低,为0.391%。当加入0.5%的Al后超高强韧钢的耐磨性降低了1.48,磨损百分比增加到0.42%。添加Ni元素能提高超高强韧钢的磨损性能,但当Al和Ni同时添加时反而不利于改善磨损性能。质量失重是由磨料的嵌入及剥落共同体现的。实验钢经冲击磨料磨损实验后表面和次表面区域通过加工硬化得到强化,Ni含量为3%时超高强韧钢拥有最佳的综合磨损后表面硬度、硬化百分比和有效硬化层深度,磨损过程更均匀。超高强韧钢的磨损形式主要为犁沟、剥落、裂纹、嵌入磨粒、犁沟浪花和挤压堆积。In this work,three-body abrasive wear experiments were carried out on 45Si2MnCr2Mo ultra-high strength steels with different Ni/Al contents by using the MLD-10 impact abrasive wear tester.The effects of different Ni/Al contents on the wear weight loss,the depth of hardened layer,and the microstructure of worn surface and subsurface of ultra-highstrength steel were systematically studied,and the wear mechanism was discussed.The results show that when the content of Ni was 3%,the wear resistance of ultra-high strength steel was the best,and the wear percentage was the lowest,which was only 0.391%.However,when 0.5%Al was added,the wear resistance decreased by 1.48,and the wear percentage increased to 0.42%.Therefore,the addition of Ni element can improve the wear performance,but it is not conducive to improve the wear performance when Al and Ni are added at the same time.The wear weight loss is reflected by the embedded quantity and size of abrasives,depression and spalling.After impact abrasive wear test,the surface and subsurface areas of ultra-high strength steel are strengt-hened by work hardening.When the content of Ni is 3%,the ultra-high strength steel has the best comprehensive surface hardness,hardening percentage and effective hardened layer depth,and the wear process is more uniform.The wear forms of ultra-highstrength steel are mainly furrows,spalling,cracks,embedded abrasive particles,furrow spray and extrusion accumulation.

关 键 词：超高强韧钢 冲击磨料磨损 磨损行为 冲击硬化 

分 类 号：TB304[一般工业技术—材料科学与工程]