高碳硬线65钢静态CCT曲线测定及组织分析  

Static CCT Curve Measurement and Microstructure Analysis of High Carbon Hard Wire 65 Steel

作　　者：帅勇 张亚君 刘觐[2] 冯小明 SHUAI Yong;ZHANG Yajun;LIU Jin;FENG Xiaoming(Xinyu Iron and Steel Co.,Ltd.,Xinyu 338001,Jiangxi,China;Jiangxi Key Laboratory of Advanced Copper-based Materials,Institute of Applied Physics,Jiangxi Academy of Sciences,Nanchang 330096,Jiangxi,China)

机构地区：[1]新余钢铁股份有限公司,江西新余338001 [2]铜基新材料江西省重点实验室,江西省科学院应用物理研究所,江西南昌330096

出　　处：《热处理技术与装备》2024年第4期1-5,共5页Heat Treatment Technology and Equipment

摘　　要：为探究高碳硬线弹簧钢轧后盘条组织和性能的变化规律,指导盘条轧后多级控温冷却工艺的制定,以65钢为研究对象开展静态CCT曲线测定及组织分析。试验结果显示,冷却速度对65钢奥氏体-珠光体相变后珠光体片层影响明显,盘条轧后风冷线采取前段5~10℃/s冷却速度、中后端1~5℃/s冷却速度、出风机温度570℃以上的分级冷却工艺,可以获得片层间距80~150 nm的索氏体+少量铁素体组织,实现了硬线钢的组织优化与性能协同提升。To explore the changes in microstructure and properties of high carbon hard wire spring steel rolled wire rod,and to guide the development of multi-stage temperature control cooling technology for rolled wire rod,static CCT curve measurement and microstructure analysis is conducted on 65 steel as the research object.The experimental results show that different cooling rates significantly impact the pearlite layer after austenite pearlite phase transformation in 65 steel.The air cooling line of rolled wire rod adopts a graded cooling process with a cooling rate of 5 to 10℃/s in the front section,the middle and rear ends of 1 to 5℃/s,and an outlet fan temperature above 570℃,which can obtain a microstructure with the layer spacing of 80 to 150 nm and a small amount of ferrite,achieve the optimization of the microstructure and synergistic of performance of hard wire steel.

关 键 词：65钢 硬线钢 CCT曲线 组织 

分 类 号：TG162.71[金属学及工艺—热处理]