铸态中碳高硼合金钢的三体磨料磨损特性  

Three Body Abrasive Wear Characteristics of Cast Medium Carbon High Boron Alloy Steels

作　　者：李日良[1] 岑启宏[1] 蒋业华[1] 李祖来[1] 

机构地区：[1]昆明理工大学材料科学与工程学院,昆明650093

出　　处：《机械工程材料》2013年第6期63-67,共5页Materials For Mechanical Engineering

基　　金：国家自然科学基金资助项目(51171073);云南省校科技合作专项(2010AD012);教育部博士学科点专项基金资助项目(20115314120002)

摘　　要：采用光学显微镜、扫描电镜、自制的三体磨料磨损试验机研究了铸态中碳高硼合金钢的组织、性能与三体磨料磨损特性。结果表明:随硼含量的增大,试验钢中硬质相的体积分数增大,试验钢硬度提高、冲击性能降低、硬质相数量和尺寸的增大都对抵抗磨料切削和犁削变形有利;基体主要因微观切削和塑变而造成磨损,硬质相表现出断裂磨损机制;低载荷时变形的基体堆积较多而磨损量小,高载荷时硼碳化合物断裂加快而使磨损量增大。The microstrueture, performance and three body ahrasive wear characteristics of the cast medium carbon high boron steels were studed by optical microscopy, scanning electron microscopy （SEM） and self-made three body abrasive wear tester. The results show that when the boron content increased, volume fraction of hard- phas,hardness and wear resistance of the test steel increased, but impact toughness reduced. The increase of bard- phase quantity and size was good to resist aDrasive cutting and furrow deforrnation. The wear of matrix was mainly attributed to micro cutting and plastic defomation, and the hard-phase showed fracture wear mechanism. Small wear rate was given in low load as a lot of deformed matrix cumulaled, but fracture of the boron carhon compounds accelerated in high load leading to the rapid increase of wear rale.

关 键 词：三体磨料磨损 高硼合金 硼碳化合物 磨损机制 

分 类 号：TG142.1[一般工业技术—材料科学与工程]