钎具钢23CrNi3MoA的静态CCT曲线测定与退火工艺  

Static CCT curve measurement and annealing process of drilling steel 23CrNi3MoA

作　　者：张志兴 王海龙 文辉 刘建 田宾华 胡林泉 Zhang Zhixing;Wang Hailong;Wen Hui;Liu Jian;Tian Binhua;Hu Linquan(Nanjing Iron&Steel Co.,Ltd.,Nanjing Jiangsu 210044,China)

机构地区：[1]南京钢铁股份有限公司,江苏南京210044

出　　处：《金属热处理》2025年第3期232-236,共5页Heat Treatment of Metals

摘　　要：利用Gleeble-3800热模拟机对0.05~20℃/s冷却速度下钎具钢23CrNi3MoA连续冷却膨胀曲线进行测试,绘制了钎具钢23CrNi3MoA静态连续冷却转变曲线(CCT曲线),分析了不同冷却速率条件下钎具钢23CrNi3MoA的组织转变规律。结果表明,钎具钢23CrNi3MoA的Ac_(1)相变温度为713℃,Ac 3相变温度为774℃。当加热温度为900℃,冷速为0.05~0.5℃/s时,试验钢为全贝氏体组织;当冷速为0.5℃/s时,试验钢开始出现马氏体组织;当冷速≥1℃/s时,试验钢可得到全马氏体组织。依据钎具钢23CrNi3MoA相变温度,指导生产制定(Ac_(1)±30)℃温度的退火工艺,可获得良好的退火态组织,从而使产品获得良好硬度取值范围。Continuous cooling dilatometric curve of drilling steel 23CrNi3MoA was tested by using a Gleeble-3800 thermal simulator at cooling rate of 0.05-20℃/s,then the static continuous cooling transformation(CCT)curve of the 23CrNi3MoA was plotted.The microstructure transformation law of the drilling steel 23CrNi3MoA under different cooling rate conditions was analyzed.The results show that the Ac_(1) phase transformation temperature of the 23CrNi3MoA is 713℃,and the Ac 3 is 774℃.When the cooling rate is 0.05-0.5℃/s,the microstructure of the tested steel is all bainite.When the cooling rate is 0.5℃/s,martensite appears.Starting from 1℃/s and over,the microstructure is all martensite.According to the phase transformation temperature of the drilling steel 23CrNi3MoA,the annealing process ranged at(Ac_(1)±30)℃can be formulated to guide the production,and a good as-annealed state structure can be obtained,so as to achieve a good hardness value range of the product.

关 键 词：钎具钢23CrNi3MoA 连续冷却转变曲线 退火 硬度 

分 类 号：TG142.1[一般工业技术—材料科学与工程]