CrMoV钢汽轮机高中压转子锻件典型缺陷分析  

Analysis of Typical Defects on CrMoV High and Medium Pressure Rotor Forging for Steam Turbine

作　　者：孟军龙 刘海澜 Meng Juniong Liu Hailan

机构地区：[1]中国第一重型机械股份公司铸锻钢事业部,黑龙江161042

出　　处：《大型铸锻件》2017年第4期31-34,共4页Heavy Casting and Forging

摘　　要：针对我公司生产的一支CrMoV合金钢汽轮机高中压整体转子锻件调质后超声检测发现的超标缺陷,采取钻床套棒、缺陷区打断口后,借助光学显微镜宏观断口体视观察及扫描电镜能谱分析等检测手段,并结合锻件冶炼浇注实际工况综合分析,最终确定缺陷性质为Al、Mg的氧化物,夹杂物来源主要是钢水侵蚀的精炼包、中间包工作层耐火砖。The defects of CrMoV alloy steel high and medium pressure rotor forging for steam turbine were found ＇alter the quenching and tempering process by uhrasonic test. By taking samples with the drilling machine and making the fracture in the defect area, the appearance of fraeture has been observed by means of optical microscope and the SEM energy spectrum analysis has been performed. By comprehensively analyzing the actual working condition of smel- ling and pouring of forging, the defects has been determined to be the oxide with A1 and Mg. The inclusions are caused by the etched firebrick on the working layer of refining ladle and tundish.

关 键 词：CR MO V钢 高中压转子 缺陷 

分 类 号：TG316.1[金属学及工艺—金属压力加工]