600MW机组锻件SA182F91钢显微组织及硬度试验研究和处理  

Study on Microstructure & Hardness Test of SA182F91 Steel Forgings for 600 MW Unit & its Treatment

作　　者：王小迎[1] 严苏星[1] 张兵[1] 白小云[1] 

机构地区：[1]陕西电力科学研究院,陕西西安710054

出　　处：《陕西电力》2009年第7期62-65,共4页Shanxi Electric Power

摘　　要：随着电力工业的迅速发展,新钢种得到了广泛应用,钢材的综合性能能否满足实际应用的要求,对发电设备的安全稳定运行有着至关重要的影响。对陕西某发电厂600 MW机组锻件SA182F91钢进行安装前产品制造质量监检时发现H91002堵阀进汽端过渡段显微组织为不良组织,因此对其显微组织及硬度进行了分析研究。分析认为,SA182F91钢在热处理状态下的正常组织为细回火板条马氏体,硬度值应在180～250 HB之间,当制造工艺欠妥或热处理工艺不当时,该钢的组织结构会出现严重损害性能的块状铁素体、硬度偏低等现象。采用优化的制造工艺和适当的正火+回火的回炉热处理工艺,能够有效改善该钢的组织结构和使用性能。Whether steal performance can satisfy the requirements of real application is important for the safe and stable operation of power generation equipment. The mierostructure of transition section at steam inlet side of H91002 blockage valve is found to be improper when quality monitoring is conducted prior to the erection of SA182F91 steel forgings for 600 MW Unit in certain power plant. Therefore, analysis and study are c, onducted to the microstmcture and hardness. The normal structure of SA182F91 steel under heat treatment condition is fine tempering lath martensite with the hardness from 180 to 250 HB. When manufacturing technology is improper, the structure shall shows itself the phenomenon of massive ferrite and low hardness. The application of opthnal manufacturing technology, proper normalizing ＆ tempering heat treatment can effectively improve the steel structure and performance.

关 键 词：发电厂 SA182F91钢 显微组织 硬度 热处理工艺 

分 类 号：TG115[金属学及工艺—物理冶金]