高温退火工艺对SAVE12耐热钢组织的影响  

Influence of High Temperature Annealing Process on Microstructure of SAVE12 Heat Resistant Steel

作　　者：楼灿洪[1] 董峰辉[2] 

机构地区：[1]长安大学公路学院,陕西西安710064 [2]同济大学土木工程学院,上海200092

出　　处：《热加工工艺》2017年第8期220-222,共3页Hot Working Technology

摘　　要：以SAVE12耐热钢为研究对象,对其组织中含量较高的高温δ铁素体的成因进行了分析。并通过冲击试验测量了常温与低温夏比V型缺口冲击功,研究了高温δ铁素体对SAVE12耐热钢性能的影响,以及不同退火温度与时间下钢组织中δ铁素体体积含量的变化情况。结果表明:正火处理的SAVE12耐热钢的基体组织为回火板条马氏体与含量为13.1vol%竹节状高温δ铁素体。经1050、1070、1100℃不同高温退火处理的高温δ铁素体均发生溶解,温度越高溶解越快,在1100℃时效10 h退火后,高温δ铁素体溶解很快,体积含量从13.1%降到1.2%。Taking SAVE12 heat-resistant steel as the research object, the formation cause of high temperature δ ferrite with higher content in the microstructure was analyzed. And Charpy V notch impact energy at room temperature and low temperature was measured by impact test. Effect of high temperature δ ferrite on properties of SAVE12 heat resistant steel, and the change of volume content of δ ferrite in steel microstructure under different annealing temperatures and time were studied. The results show that： matrix microstructure of SAVE 12 heat-resistant steel is temper lath martensite and bamboo-like high temperature δ ferrite with the content of 13.1vo1%. The high temperature g ferrite after annealing treatment at 1050, 1070, 1100 ℃ is dissolved. The higher the temperature is, the faster the dissolution is. After aging at 1100 ℃ for 10h and then annealing, high temperature δferrite dissolves quickly, and volume content decreases from 13.1% to 1.2%.

关 键 词：耐热钢 高温δ铁素体 高温退火 

分 类 号：TG156.2[金属学及工艺—热处理]