冷却速度对高铬铸铁凝固组织及耐磨性的影响  

Effects of Cooling Rate on Solidification Structure and Wear Resistance of High Chromium Cast Iron

作　　者：黄鹏[1,2,3] 纪秀林[2] 吴怀超 单益平[2] 王鲲鹏[1,3] HUANG Peng;Jl Xiu-lin;WU Huai-chao;SHAN Yi-ping;WANG Kun-peng(Guizhou University, Guiyang 550025, Guizhou, China;Hohai University, Changzhou 213022, Jiangsu, China;State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China)

机构地区：[1]贵州大学,贵州贵阳550025 [2]河海大学,江苏常州213022 [3]清华大学摩擦学国家重点实验室,北京100084

出　　处：《铸造》2019年第8期854-859,共6页Foundry

基　　金：贵州省高层次创新型人才培养计划项目(黔科合平台人才(2016)5659);贵州省留学人员科技活动项目择优资助重点项目(黔人项目资助合同(2018)0001号);贵州省科技计划项目(黔科合平台人才[2017]5788号)

摘　　要：研究了高铬铸铁在凝固过程中冷却速度对微观组织及耐磨性的影响。结果显示,高铬铸铁在凝固过程中,快的冷却速度使碳化物硬质相的硬度降低,韧性提高;冲蚀磨损的作用下,不易脱落和脆性断裂,因而对基体有较好的保护作用,使得单位面积上体积损失率变小。高铬铸铁在凝固过程中的冷却速度越快,其抗冲蚀磨损的能力就越强。The effects of cooling rate on the microstructure and wear resistance of high chromium cast iron during solidification were studied. The results show that, the faster cooling rate makes the hardness of hard phase carbides in high chromium cast iron decrease, the toughness increase, therefore, brittle fracture is not easy to occur under the action of erosion wear, as they have a better the protection action on matrix, so the volume loss rate per unit area is reduced. That is, the faster the cooling rate, the higher the anti-erosion wear ability of chromium cast iron.

关 键 词：高铬铸铁 金相组织 凝固速度 冲蚀磨损 

分 类 号：TG135.6[一般工业技术—材料科学与工程]