淬火冷速对过共析轨钢中珠光体组织的影响  

Effect of quenching cooling rate on pearlite microstructure of hypereutectoid rail steel

作　　者：王东梅 赵磊城 陈林[1] 包喜荣[1] 郭瑞华[1] Wang Dongmei;Zhao Leicheng;Chen Lin;Bao Xirong;Guo Ruihua(School of Materials and Metallurgical,Inner Mongolia University of Science&Technology,Baotou Inner Mongolia 014010,China;Key Laboratory of New Metal Materials of Inner Mongolia Autonomous Region,Baotou Inner Mongolia 014010,China;The Third Branch of Inner Mongolia First Machinery Group Co.,Ltd.,Baotou Inner Mongolia 014030,China)

机构地区：[1]内蒙古科技大学材料与冶金学院,内蒙古包头014010 [2]内蒙古自治区新金属材料重点实验室,内蒙古包头014010 [3]内蒙古第一机械集团股份有限公司第三分公司,内蒙古包头014030

出　　处：《金属热处理》2021年第3期12-17,共6页Heat Treatment of Metals

基　　金：内蒙古自治区自然科学基金(2020BS05035);内蒙古科技大学创新基金(2019QDL-B04);内蒙古自治区科技重大专项(ZDZX2018024);内蒙古自治区科技创新引导项目(第三代高强度重载耐磨热处理钢轨关键技术研究及应用)。

摘　　要：采用OM、SEM以及硬度测试等方法研究了淬火工艺中冷却速率对过共析轨钢珠光体组织特征的影响规律。结果表明,随着冷却速率的提高,珠光体片层间距和渗碳体厚度均逐渐减小,分别由302 nm和43.6 nm减小到205 nm和29.2 nm。珠光体片层间距的细化对硬度提高起到了一定作用,使其由286 HV提高到了348 HV。Effect of cooling rates on pearlite microstructure characteristics of the hypereutectoid rail steel in the quenching process was investigated by means of OM,SEM and hardness testes.The results show that with the increase of cooling rates,the pearlite interlamellar spacing and cementite thickness decrease from 302 nm and 43.6 nm to 205 nm and 29.2 nm,respectively.Moreover,the refined pearlite interlamellar spacing acts on the enhancement of hardness from 286 HV to 348 HV.

关 键 词：过共析轨钢 冷却速率 珠光体片层间距 细化 

分 类 号：TG142.21[一般工业技术—材料科学与工程]