【摘要】 利用100 t转炉冶炼,LF炉精炼,小方坯连铸及第六代摩根高速线材轧机,转炉终点控制出钢温度为1 630～1 650℃;终点w(C)≥0.06%,w(P)≤0.020%;轧制时控制钢坯加热温度为950～1 040℃,开轧温度为930～980℃,吐丝温度为850～890℃,安钢成功研发出20Mn2A圆环链用热轧盘条。结果表明:产品屈服强度、抗拉强度、延伸率、面缩率平均值均大于协议要求,φ12 mm盘条中心处和1/2半径处组织均为F+P,1/2半径处晶粒度为9.0～9.5级。盘条表面光滑,成品尺寸精度稳定控制在±0.15 mm,完全满足国标及用户技术协议的要求。更多还原

【Abstract】 20Mn2A hot-rolled wire rod for ring chain was researched and developed by Angang successfully by adopting 100 t converter smelting,LF furnace refining,small billet continuous casting and the sixth-generation Morgan high-speed wire rod mill,tapping temperature at converter end-point was controlled from 1 630 ℃ to 1 650 ℃,end w(C) no less than 0.06%,w(P) no more than 0.020%,steel billet heating temperature while rolling was controlled from 950 ℃ to 1 040 ℃,rolling temperature from 930 ℃ to 980 ℃,wire rod laying temperature from 850 ℃ to 890 ℃.Results show that average value of product yield strength,tensile strength,elongation percentage,area reduction is higher than agreement requirement.The microstructure of diameter 12 mm central and 1 /2 radius area are both ferrite and pearlite,1 /2 radius grain size grade is from 9.0 to 9.5.Wire rod surface is smooth,finished product size accuracy is controlled within ± 0.15 mm stably,which satisfy the requirements of national standard and customer technical agreement.更多还原