Q960E超高强钢板控温淬火试验研究与应用  

Experimental Study and Application of Temperature-Controlled Quenching for Q960E Ultra High Strength Steel Plates

作　　者：杨森宇 付天亮[1] 朱美君 王昭东[1] YANG Sen-yu;FU Tian-liang;ZHU Mei-jun;WANG Zhao-dong(State Key Laboratory of Rolling and Automation,Northeastern University,Shenyang 110819,China;Nanjing Iron&Steel Co.,Ltd.,Nanjing 210035,China)

机构地区：[1]东北大学轧制技术及连轧自动化国家重点实验室,辽宁沈阳110819 [2]南京钢铁股份有限公司,江苏南京210035

出　　处：《东北大学学报（自然科学版）》2022年第11期1570-1574,共5页Journal of Northeastern University(Natural Science)

基　　金：辽宁省人才计划项目(XLYC2007039)。

摘　　要：利用宽厚板厂辊式淬火装备,对比分析了控温淬火和常规淬火工艺对不同厚度Q960E工程机械用超高强钢板组织性能的影响,获得了两种淬火工艺下钢板淬火后组织和力学性能.结果显示:20,30和40 mm厚Q960E钢板控温淬火至终冷表面温度40℃,可节约淬火装备用水量40%以上,淬后钢板表面质量优异,钢板平直度≤3 mm/m.与常规辊式淬火组织明显不同,控温淬火后,钢板发生余热自回火,其近表面、1/4厚度和1/2厚度位置处均为自回火马氏体组织.Q960E钢板控温淬火后综合力学性能优异,平均维氏硬度≥420,略高于常规辊式淬火,钢板屈服强度>980 MPa,抗拉强度>1 000 MPa,伸长率>14%,钢板塑性良好,-40℃冲击功>44 J.The influence of temperature-controlled quenching and conventional quenching on the microstructure and mechanical properties of Q960 E ultra-high-strength steel plates, with a thickness of 20, 30 and 40 mm, was analyzed using the roller-type jet quenching facility. The microstructure and properties of steel plates under two quenching process conditions were obtained. The results revealed that, when the quenching termination temperature is 40 ℃, more than 40% of the water consumption can be saved. The surface quality of quenched plates is significantly improved and the flatness is ≤3 mm/m. The microstructure of the experimental steel plates processed by temperature-controlled quenching consists of auto-tempered martensite, which is different from the conventional roller-type quenching. The steel plates exhibit excellent comprehensive mechanical properties after temperature-controlled quenching with an average Vickers hardness of ≥420, yield strength of >980 MPa, tensile strength of >1 000 MPa, elongation of >14%. The impact energy is more than 44 J at-40 ℃.

关 键 词：超高强钢板 控温淬火 终冷温度 常规辊式淬火 组织性能 

分 类 号：TG156.31[金属学及工艺—热处理]