95CrMo钢穿管异常分析与改进  

ANALYSIS AND IMPROVEMENT OF ABNORMAL TUBE FORMING OF 95CRMO STEEL

作　　者：李双居 王兵[2] 杭亮 孙玉春 赵瑞华 Li Shuangju Wang Bing Hang Liang Sun Yuchun Zhao Ruihua(HBIS Group Shisteel Company, Shijiazhuang, Hebei, 050031 Automotive Engineering Department, Hebei Vocational and Technical College, Shijiazhuang , Hebei 050091)

机构地区：[1]河钢集团石钢公司,河北石家庄050031 [2]河北工业职业技术学院汽车工程系,河北石家庄050091

出　　处：《河北冶金》2017年第9期27-29,33,共4页Hebei Metallurgy

摘　　要：通过对管坯缺陷位置成分、高倍分析,结合对应炉次圆钢的高倍、组织分析,最终确定由于圆钢存在较严重的碳化物偏析,在加热、穿管过程中产生过烧,导致轧件产生分层、粘连芯棒、爆管事故。将穿管加热温度由1 090℃降低至1 030℃后,消除了爆管事故,保证了正常生产。The cause of abnormal piercing was determined through the composition and high magnification morphology analysis of the defect position of tube billet,and the microstructure analysis of the round steel with the corresponding batch number. The reason is as follow： there is serious carbide segregation in the round steel microstructure which will cause the over burning during heating and piercing,It and that leads to delamination of rolled piece,adhesion of mandril and tube burst. The tube burst can be avoided through reducing the heating temperature from 1 090 ℃ to 1 030 ℃ during tube forming process. The production returns to normal.

关 键 词：95CrMo钢 粘连 偏析 过烧 分析 改进 

分 类 号：TG142.1[一般工业技术—材料科学与工程]