国网大规格角钢腿部靠近圆弧处开裂分析  

Analysis and Control over Crack near Curve on Leg of Big Size Angle Steel Used in State Grid

作　　者：刘鸿芳[1] 孙建新 LIU Hong- fang SUN Jian-xin(Electric Power Research Institute of State Grid Tianjin Electric Power Company, Tianjin 300384, China Tianjin Tiangang Joint Special Steel Co., Ltd., Tianjin 300150, China)

机构地区：[1]国网天津市电力公司电力科学研究院,天津300384 [2]天津天钢联合特钢有限公司,天津300150

出　　处：《天津冶金》2017年第2期34-37,共4页Tianjin Metallurgy

摘　　要：针对国网大规格角钢腿部靠近圆弧处出现的开裂问题,通过采用宏观检测、微观检测、组织检测和电镜EDS等方法分析出产生原因为钢水洁净度较低,铸坯表面夹杂物富集,轧制工艺不合理。通过采用复吹或高碳出钢等技术,优化脱氧工艺,精确控制轧制工艺参数等措施,使该问题得到了有效控制。The crack near curve on the leg of big size angle steel used in state grid was analyzed by macroscopic inspection, microscopic inspection, structure inspection and electronic microscope and its causes were found to be low steel cleanliness, inclusion concentration on billet surface and unreasonable rolling process. The problem was well curbed by adopting combined blowing or high carbon tapping technology, optimizing deoxidation process and precisely controlling rolling process parameters.

关 键 词：国家电网 大规格角钢 裂纹 钢水洁净度 

分 类 号：TF76[冶金工程—钢铁冶金] TG335.41[金属学及工艺—金属压力加工]