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 High-strength Micro-deformation Steel GDL-1

作　　者：凌敏[1] 梁益龙[2] 李劲松[1] 

机构地区：[1]铜仁职业技术学院工程技术系,贵州铜仁554300 [2]贵州省材料结构与强度重点实验室,贵州贵阳550003

出　　处：《金属材料与冶金工程》2012年第3期-,共4页Metal Materials and Metallurgy Engineering

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1 h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1 h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。Microstructure and mechanical properties of high-strength micro-deformation steel GDL-1 under seven heat treatment status were analyzed.The study revealed that the microstructure of GDL-1 under 900 ℃ heat preservation 1 hour air-cooled tempered is narrow bundle bainite + granular bainite plus a little martensite,while under oil quenching tempering it is tempered martensite,the grain size under 910 ℃ heating is generally 8-9 grade.Within the scope of low temperature tempering,with lifting of the tempering temperature,the impact toughness increases gradually,the yield strength decreases gradually,while the hardness remains relatively stable.

关 键 词：GDL-1 显微组织 力学性能 晶粒度 

分 类 号：TG142.41[一般工业技术—材料科学与工程]