Nb对高碳铬钼铸钢组织及性能的影响  

Influence of Niobium on Microstructure and Properties of High Carbon Chromium Molybdenum Cast Steel

作　　者：侯智伦 赵龙 翟敢超 胡宏发 陈湘茹 翟启杰 Hou Zhilun;Zhao Long;Zhai Ganchao;Hu Hongfa;Chen Xiangru;Zhai Qijie(Center for Advanced Solidification Technology,School of Materials Science and Engineering,Shanghai University;Department of Mechanical Automotive Materials,University of Windsor)

机构地区：[1]上海大学材料科学与工程学院先进凝固技术中心 [2]加拿大温莎大学机械汽车材料系

出　　处：《特种铸造及有色合金》2023年第8期1105-1110,共6页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(52071195)。

摘　　要：探究了Nb对高碳铬钼铸钢奥氏体晶粒尺寸、珠光体片层间距及硬度的影响。在最佳Nb含量的基础上,对比研究了Nb对高碳铬钼铸钢冲击磨料磨损性能的影响。结果表明,当Nb含量(质量分数)为0.05%时,高碳铬钼铸钢奥氏体晶粒尺寸、珠光体片层间距最小,而硬度最高。在冲击磨料磨损试验中,不同的磨损参数下,0.05%Nb含量试样的磨损量比不含Nb的减少了9%~41%。在高碳铬钼铸钢中,Nb的细晶强化、析出强化作用成为了高碳铬钼铸钢组织及性能优化的关键。The effects of niobium on austenite grain size,pearlite lamellum spacing and hardness of high-carbon CrMo cast steel were investigated.Based on the optimal niobium content,the effects of niobium on impact abrasive wear properties of high-carbon CrMo cast steel were analyzed comparatively.The results show that when the niobium content is 0.05%,the austenite grain size and pearlite lamellum spacing of high-carbon CrMo cast steel are minimum,and the hardness reaches the maxinum value.In the impact abrasive wear test,the wear amount of the sample containing 0.05% Nb is reduced by 9%~41% compared with that without niobium under different wear parameters.In high carbon CrMo cast steel,the fine grain strengthening and precipitation strengthening of niobium play the key role to optimize the microstructure and properties of high carbon CrMo cast steel.

关 键 词：NB 高碳铬钼铸钢 冲击磨料磨损 微合金 

分 类 号：TG113.25[金属学及工艺—物理冶金] TG146.416[金属学及工艺—金属学]