GDL-1钢不同热处理状态下的显微组织与力学性能  

Microstructure and Mechanical Properties of Steel under Conditions of Different Heat Treatment

作　　者：凌敏[1] 

机构地区：[1]铜仁职业技术学院工程技术系,贵州铜仁554300

出　　处：《贵州工业职业技术学院学报》2012年第3期8-10,19,共4页GUIZHOU SCIENCE AND TECHNOLOGY PROFESSIONAL COLLEGE

基　　金：贵州省创新基金（024015）

摘　　要：对一种新型高强韧微变形钢（GDL-1）在七种热处理状态下的显微组织与力学性能进行了分析。结果表明，该钢在900℃保温1h空冷回火后的显微组织以窄束状贝氏体＋粒状贝氏体为主加少量马氏体，而油淬回火后的组织为回火马氏体；910℃加热奥氏体化1h的晶粒度普遍在8—9级。在低温回火温度范围内，随着回火温度的升高，冲击韧性逐渐增大，屈服强度逐渐降低，硬度变化不大。It analyzes the microstructure and mechanical properties of high - toughness and micro - deformation steel （ GDL - 1 ） in seven heat - treated conditions. The result shows that the microstructure of the steel is narrow bundle bainite ＋ granular bainite with small amount of martensite after tempering at 900 ℃ for 1 h air - cooling, but the structure is tempered martensite after oil tempering; The grain size is generally at 8 to 9 level at 910 ℃ austenitizing lh. In the low - temperature tempering temperature range, with the tempering temperature＇s advancement , the impact toughness is gradually increased, the yield strength decreased, little change in hardness.

关 键 词：GDL-1 显微组织 力学性能 晶粒度 

分 类 号：TG151.1[金属学及工艺—热处理]