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.
出处
《陕西电力》
2009年第7期62-65,共4页
Shanxi Electric Power
作者简介
王小迎（1970-），女，河北宁晋人，硕士研究生，高级工程师，从事电站承压设备焊接技术研究、高温部件寿命评估及构件失效分析工作。
