热处理工艺对TG700C热挤压管组织性能的影响  

Effect of Heat Treatment on Microstructure and Properties of TG700C Hot Extruded Tubes

作　　者：王荃 李鹏 方旭东[2] 李阳[2] 

机构地区：[1]山西太钢不锈钢钢管有限公司,山西太原030008 [2]先进不锈钢材料国家重点实验室(太原钢铁(集团)有限公司),山西太原030003

出　　处：《热加工工艺》2015年第8期197-199,202,共4页Hot Working Technology

摘　　要：采用热处理、金相显微观察、SEM分析、力学检测等试验方法,研究了热处理工艺对TG700C热挤压管组织性能的影响。结果表明:随加热温度的升高,TG700C合金挤压管中的小颗粒的二次碳化物逐渐回溶,大颗粒的一次碳化物几乎无法溶解;合金的奥氏体晶粒尺寸随热处理温度的升高而均匀长大,其晶粒长大的表观激活能为623.6 k J/mol;随热处理温度的升高,合金的屈服强度和抗拉强度逐渐降低,伸长率逐渐升高。Effects of heat treatment on microstmcture and properties of TG700C hot extrusion tube were studied through heat treatment, metallographic for observation, SEM analysis and mechanical test. The results show that： with the heating temperature increasing, the second carbide small particles of TG700C alloy extruded tube gradually dissolve, but the first carbide large particles hardly dissolve; austenite grain size of the alloy uniformly grows with the heating temperature increasing. The grain growth activation energy is 623.6 kJ/mol. With temperature increasing, the tensile strength and yield strength of the alloy decrease gradually, but the elongation increases gradually.

关 键 词：TG700C 热处理 碳化物 晶粒尺寸 

分 类 号：TG166.7[金属学及工艺—热处理]