20CrNi2Mo钢干摩擦磨损行为及次表层马氏体形变  

Friction induced wear and martensite deformation behavior of 20CrNi2Mo steel

作　　者：尹存宏[1,2] 梁益龙[3,4,5] 

机构地区：[1]贵州大学机械工程学院,贵州贵阳550025 [2]贵州交通职业技术学院,贵州贵阳550003 [3]贵州大学材料与冶金学院,贵州贵阳550025 [4]贵州省材料结构与强度重点实验室,贵州贵阳550025 [5]贵州大学高性能金属结构材料与制造技术国家地方联合工程实验室,贵州贵阳550025

出　　处：《钢铁》2017年第8期81-86,共6页Iron and Steel

基　　金：国家自然科学基金资助项目(51671060);黔科合重大专项资助项目(20146012);黔科合资助项目(JZ20142003)

摘　　要：利用MMU-10试验机,在0.13 m/s的速度下,分组对20CrNi2Mo盘环对摩试样进行100、120、150 N接触载荷下的干滑动摩擦磨损试验。采用SEM、EDS、EBSD表征摩擦磨损后环试样表面和截面的形貌及元素。结果表明,接触载荷为150 N时摩擦因数最低、磨损量最大。摩擦热导致磨损表面出现严重的氧化和脱落材料焊结现象,磨损机制由氧化磨损、磨粒磨损和黏着磨损构成。磨损导致了次表层组织变化,出现严重塑性形变层和马氏体形变层。截面EBSD分析结果反映了表层至次表层的应变,EBSD菊池花样质量从表面朝深度方向逐渐提升,采用EBSD图像分割处理及Band Contrast平均值求解可准确找出磨损导致的形变层终止区域。The ring-disk dry sliding friction and wear testing were performed under various normal loads （ 100, 120 and 150 N） at 0.13 m/s by using the MMU-10 machine. The surface and subsurface microstructures were characterized by scanning electron microscopy （SEM） and electron back-scattered diffraction （EBSD）. It is highlighted that the mini- mum friction coefficient and maximum wear rate are under load of 150 N. Friction hot leads to serious oxidation and weld on the worn surface. The wear mechanism is a combination of abrasive wear, adhesive wear and oxidation wear. The subsurface is divided into two layers： severe plastic deformation layer （SPDL） and martensite deformation layer （MDL）. The strain from surface to subsurface is reflected from the EBSD results. The pionts of the kikuchi pattern by EBSD increase from the sample surface to the inner. The terminal regions of the deformation layers are determined accu- rately by EBSD and BC-depth curve.

关 键 词：20CrNi2Mo 磨损 塑性变形 EBSD 

分 类 号：TG142.1[一般工业技术—材料科学与工程]