逆相变退火处理Fe-Mn-C中锰钢的组织与性能  

Microstructure and properties of Fe-Mn-C medium-Mn steel processed by ART-annealing

作　　者：孙荣民[1] 李国阳 王辉[1] 王存宇[1] 王玉辉[2,3] 曹文全 SUN Rong-min;LI Guo-yang;WANG Hui;WANG Cun-yu;WANG Yu-hui;CAO Wen-quan(Institute of Special Steels,Central Iron and Steel Research Institute,Beijing 100081,China;State Key Laboratory of Metastable Materials Science and Technology,Yanshan University,Qinhuangdao 066004,Hebei,China;National Engineering Research Center for Equipment and Technology of Cold Rolled Strip,Yanshan University,Qinhuangdao 066004,Hebei,China)

机构地区：[1]钢铁研究总院特殊钢研究所,北京100081 [2]燕山大学亚稳材料制备与科学国家重点实验室,河北秦皇岛066004 [3]燕山大学国家冷轧板带装备及工艺工程技术研究中心,河北秦皇岛066004

出　　处：《钢铁》2021年第6期82-88,共7页Iron and Steel

基　　金：国家自然科学基金资助项目(51871062,51871194,51371057)。

摘　　要：为了研究奥氏体逆相变(austenite reverse transformation,ART)退火处理对Fe-Mn-C中锰钢的组织与性能的影响,以ART退火处理1、10和360 min后Fe-5Mn-0.2C中锰钢为基础,利用XRD、SEM等手段对其显微组织进行表征,通过WE-300型拉伸试验机和ML-10型销盘式磨料磨损试验机对其拉伸性能和耐磨性进行测试。结果表明,ART退火过程中,残余奥氏体在原奥氏体板条之间形核并长大,原始马氏体组织逐渐转变为铁素体-奥氏体板条交替分布的复合组织。随着ART退火时间的延长,残余奥氏体体积分数增加(由18.4%提高到33.6%),Fe-5Mn-0.2C钢的综合力学性能和耐磨性随着残余奥氏体体积分数的增加而显著提高,强塑积由25613提高到44496 MPa·%,其耐磨性与目前广泛应用的ZGMn13耐磨钢、Hardox450耐磨钢和中碳马氏体耐磨钢相当。In order to study the microstructure and properties of Fe-Mn-C medium-Mn steel processed by ART-annealing,based on Fe-5Mn-0.2C medium-manganese steel after ART-annealing for 1,10 and 360 min,its structure was characterized by XRD and SEM,and its tensile properties and wear resistance were tested by WE-300 tensile testing machine and ML-10 pin-disc abrasive wear testing machine,respectively.The results show that the retained austenite nucleates and grows between the original martensite laths during the ART annealing process,and the original martensite structure gradually transforms into a composite structure composted of the alternately distributed ferrite and austenite lath.With increasing the ART annealing time(1,10 and 360 min),the volume percent of retained austenite continues to increase(from 18.4%to 33.6%).The comprehensive mechanical properties and wear resistance of the Fe-5Mn-0.2C steel significantly improved with the increase of retained austenite volume percent,the product of tensile strength and total elongation increased from 25613 to 44496 MPa·%,and its wear resistance reached the similar ability of ZGMn13 steel and Hardox450 wear-resistant steel.

关 键 词：中锰钢 耐磨性 力学性能 奥氏体逆相变退火 残余奥氏体 

分 类 号：TG142.1[一般工业技术—材料科学与工程] TG156.2[金属学及工艺—金属材料]