Fe-26Mn-7Al-1.3C耐磨钢水韧处理的组织性能及形变硬化  

Microstructure,mechanical properties and strain hardening of Fe-26Mn-7Al-1.3C wear resistant steel after water toughening treatment

作　　者：王汝杰[1] 谭志东[2] 宋仁伯[2] 彭世广[2] 苏耀明[1] 孙伟锐 

机构地区：[1]鞍钢集团矿业公司设备检修协力中心,辽宁鞍山114003 [2]北京科技大学材料科学与工程学院,北京100083

出　　处：《金属热处理》2017年第10期6-10,共5页Heat Treatment of Metals

摘　　要：研究了1000、1050和1100℃水韧处理后Fe-26Mn-7Al-1.3C耐磨钢的力学性能和微观组织,分析其变形过程中的形变硬化行为,研究其微观变形机理。结果表明,水韧处理有利于组织中的κ系碳化物细化固溶,得到均匀的单相奥氏体组织,提高钢的强度和韧性。1050℃水韧处理后试验钢的综合力学性能最佳,其抗拉强度为723.9 MPa,规定塑性延伸强度为395.5 MPa,断后伸长率为48.8%,冲击吸收能量(V型缺口)为263.9 J。连续的形变硬化行为使得试验钢获得高强度与塑性的良好匹配;变形后奥氏体中可观察到泰勒晶格、高密度位错墙及微带结构,符合平面滑移特征。The mechanical properties and microstructure of Fe-26 Mn-7 A-1. 3 C wear resistant steel after water toughening treatment at 1000 ℃,1050 ℃ and 1100 ℃,respectively were investigated to analysis the evolution law. The tensile deformation characteristic and deformation mechanism were also studied. The results show that,water toughening treated contributes to dissolving remaining carbides in the austenite matrix and substantially improving the strength and toughness. After water toughening treated at 1050 ℃,the tensile strength,yield strength,elongation and impact energy（ V-notch） of the steel are 723. 9 MPa,395. 5 MPa,48. 8%,263. 9 J,respectively. Continuous strain hardening behavior provides the steel with perfect combination of strength and ductility. The microstructure of deformed sample,including Taylor lattice,high density dislocation wall and microband on the surface of deformed austenite,shows the obvious characteristics of planar gliding.

关 键 词：耐磨钢 水韧处理 形变硬化 位错滑移 

分 类 号：TG142.1[一般工业技术—材料科学与工程]