摘要
针对国内生产350 km/h高洁净度钢轨存在非金属夹杂物控制的核心问题,开展了相关研究。通过采用适宜的钢包底部吹氩模式和钢包渣组成,显著提高了钢中非金属夹杂物的去除率,T[O]去除率提高近40%;对硫化物夹杂的变性处理有效地控制了钢轨钢中夹杂组成和形态。这些技术在350 km/h高洁净度钢轨钢生产中的应用,不仅使钢轨的T[O]降到10．17×10^(-6),而且A类和B、C、D类非金属夹杂物评级分别≤2．0级和1．0级,实现了350 km/h高洁净度钢轨钢的批量生产。
In order to control the non - metallic inclusions in producing of rail steel with high cleanliness for 350 km/h, the research in control technique of non- metallic inclusions was carried out systematically. The removal ratio of non - metallic inclusions increased remarkably by adopting proper blowing argon mode at ladle bottom and optimum composition of ladle slag, and the T[O] reduced about 40%. The shape and composition of the inclusion was controlled effectively by modifying sulphide. After applied the control techniques in the production of rail steel with high cleanliness for 350km/h, the T[O] in steel rail reduced to 10.17 × 10^-6,A type inclusion ≤ 2.0 grade, B, C and D type inclusion ≤ 1.0 grade, which could meet the requirement of technical indexes for high speed steel rail, and made Panzhihua Iron and Steel Company become the first enterprise at domestic could produce rail steel with high cleanliness for 350 km/h in mass scale.
出处
《钢铁钒钛》
CAS
2007年第1期48-52,共5页
Iron Steel Vanadium Titanium
关键词
高速钢轨
洁净度
非金属夹杂物
high speed steel rail
cleanliness
non- metallic inclusion
