摘要
采用显微组织观察、室温冲击试验、硬度测试、高温拉伸试验等研究了固溶处理对13Cr9Mo1Co1Ni VNbNB马氏体耐热钢组织及性能的影响。结果表明:随着固溶温度的升高、保温时间的增加,试验钢晶粒逐渐长大。1020℃固溶试验钢晶粒长大速率较慢,1100℃固溶试验钢晶粒长大速率较快,固溶温度达到1140℃时,试验钢晶粒开始异常长大。固溶温度对试验钢晶粒尺寸的影响高于固溶时间的。经过1100℃不同保温时间固溶处理的试验钢,进行680℃×4 h回火,随着固溶时间的增加,试验钢室温冲击吸收能量下降显著,硬度小幅度下降,高温抗拉强度和伸长率变化不大。经1100℃×0.5 h固溶+680℃×4 h回火的试验钢,综合力学性能最佳。
Effects of solution treatment on the microstructure and mechanical properties of 13 Cr9 Mo1 Co1 NiVNbNB martensitic heat-resistant steel were studied by means of microstructure observation,impact test at room temperature,hardness test and high temperature tensile test.The results show that with the increase of solution temperature and holding time,the grain of test steel grows gradually.The grain growth rate of the test steel at 1020℃is slow.The grain growth rate solution test steel at 1100℃is faster.When the solution temperature reaches 1140℃,the grains begin to grow abnormally.The effect of solution temperature on grain size is higher than that of solution time.The test steel soluting at 1100℃for different holding time,and then tempering at 680℃×4 h,with the increase of solution time,the room temperature impact absorption energy of the test steel decreases significantly,the hardness decreases slightly,and the high temperature tensile strength and elongation change little.The comprehensive mechanical properties of the test steel after solution treatment at 1100℃×0.5 h and tempering at 680℃×4 h are best.
作者
赵亚忠
ZHAO Yazhong(School of Mechanical and Automobile Engineering,Nanyang Institute of Technology,Nanyang 473004,China)
出处
《热加工工艺》
北大核心
2021年第22期128-131,共4页
Hot Working Technology
基金
河南省科技攻关项目(172102210425)。
关键词
马氏体耐热钢
固溶处理
回火
组织
力学性能
martensitic heat-resistant steel
solution treatment
temper
microstructure
mechanical properties
