回火工艺对Q690D高强度工程机械用钢性能的影响  

Effects of Tempering Process on Properties of Q690D High Strength Steel for Construction Machinery

作　　者：郑治秀 王强 尹绍江 臧淼 杨小龙 Zheng Zhixiu;Wang Qiang;Yin Shaojiang;Zang Miao;Yang Xiaolong(Tangshan Medium Steel Plate Co.,Ltd.)

机构地区：[1]唐山中厚板材有限公司

出　　处：《宽厚板》2020年第4期37-41,共5页Wide and Heavy Plate

摘　　要：针对唐山中厚板材有限公司轧制的25 mm、30 mm厚度Q690D低合金高强钢回火工艺进行系统研究,同时基于实验室热处理工艺下的性能及金相组织,深入分析回火温度、回火时间对力学性能的影响规律。结果表明:随着回火温度的增加和回火时间的延长,抗拉强度降低,延伸率及低温冲击功升高,回火工艺的选择取决于热轧态抗拉强度分布。研究结果为合理制定热轧态不同强度区间实验室及工业热处理工艺提供指导。For Q690D grade low alloy high strength steel of 25 mm and 30 mm thickness produced by Tangshan Medium Steel Plate Co.,Ltd.,the tempering process is systematically studied,the law of tempering temperature and time influencing mechanical properties is analysed in depth on the basis of mechanical properties and metallographic structure under the conditions of heat treatment in lab.The results show that with increasing tempering temperature and prolonging tempering time,the tensile strength decreases,elongation ratio and low temperature impact energy value increase,the tempering process selection depends on the as-rolled tensile strength distribution.The research results can be used as guidance of establishing proper laboratory and industrial heat treatment scheme in different as-rolled strength region.

关 键 词：Q690D 高强度 回火工艺 显微组织 

分 类 号：TG142.1[一般工业技术—材料科学与工程] TG156.5[金属学及工艺—金属材料]