HP295热装裂纹的产生原因及控制措施研究  

Study on Causes and Prevention Measures of HP295 Hot Charging Crack

作　　者：严立新 梁亮 李国仓 徐光[3] 邓想涛[2] 王昭东[2] YAN Lixin;LIANG Liang;LI Guocang;XU Guang;DENG Xiangtao;WANG Zhaodong(Lianyuan Iron&Steel Group Co.,Ltd.,Loudi 417009,China;The State Key Laboratory of Rolling and Automation,Northeastern University,Shenyang 110819,China;College of Materials and Metallurgy of WUST,Wuhan 430081,China)

机构地区：[1]涟源钢铁集团有限公司,湖南娄底417009 [2]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 [3]武汉科技大学材料与冶金学院,湖北武汉430081

出　　处：《金属材料与冶金工程》2023年第2期54-60,共7页Metal Materials and Metallurgy Engineering

摘　　要：采用热模拟实验、光学显微镜、高温激光共聚焦显微镜和透射电镜等技术研究了HP295焊接气瓶钢的热装温度和变形对其组织和析出的影响。结果表明:当奥氏体化温度为1180℃时,热装温度避开两相区温度(650~800℃),可以避免裂纹的产生;而加热温度升高到1250℃时,不同热装温度对最终组织没有明显影响,这也可以消除热装温度和析出的影响。The paper studies influence of hot charging temperature and deformation of HP295 steel for welded gas cylinders on its microstructure and segregation,based on thermal simulation experiment,optical microscope,laser scanning confocal microscope and transmission electron microscope.The result shows that when austenitizing temperature is 1180℃,hot charging temperature shall be away from intercritical temperature(650~800℃),so as to avoid crack.Or when reheating temperature is raised to 1250℃,there is no significant effect on final microstructure with different hot charging temperature and the effect of hot charging temperature and segregation is also eliminated.

关 键 词：焊瓶钢 热装裂纹 奥氏体化温度 析出物 HP295钢 

分 类 号：TG142.7[一般工业技术—材料科学与工程]