摘要
薄腹板异形坯更体现了近终形的特点.采用有限元数值模拟计算了薄腹板异形坯连铸温度场,分析了不同拉速、比水量对连铸过程温度、坯壳厚度和液芯长度的影响.结果表明：异形坯不同位置的温度和坯壳厚度不均匀,当异形坯腹板较薄时,腹板处凝固传热较慢,腹板处和R角处坯壳最薄弱,比翼缘边部薄约4mm;拉速每提高0.1 m/s,异形坯出结晶器时的表面温度会提高约80～100℃,坯壳厚度会减薄0.8～1.2mm,液芯长度增加1.2～1.6m;比水量每提高0.05 L/kg,异形坯出二冷段时的表面温度会降低约8～16℃,液芯长度缩小0.13m.
Thin-web beam blank embodied the near net-shape characteristic. Temperature distribution of thin-web beam blank continuous casting was calculated by finite element numerical simulation. The effect of casting speed and secondary cooling water ratio on temperature, solidified shell thickness and liquid core length was analyzed. The re sults are concluded as follows： when the web width is thinner, the thermal conductivity is lower, the shell thickness of web and fillet center is about 4mm thinner than flange tip＇s; when casting speed made every increase of 0.1 m/s, the surface temperature at the mold exit will increase 80-100 ℃ and the solidified shell thickness will be thinned 0.8- 1.2mm and liquid core length will be reduce by 1.2-1.6m; when water ratio in secondary cooling made every increase of 0.05 L/kg, the surface temperature at secondary cooling exit will reduce by 8-16 ℃ and liquid core length will reduce by 0.13m.
出处
《钢铁》
CAS
CSCD
北大核心
2013年第12期36-40,共5页
Iron and Steel
关键词
薄腹板异形坯
连铸
温度场
thin-web beam blank
continuous casting
temperature distribution
