超高强度钢帘线的生产试制

Production trial of super-strength steel cord

增加超高强度钢帘线用原材料中C的含量并适当添加Cr,可提高钢丝拉拔后的抗拉强度和韧性,为防止断丝还需控制原料的中心偏析和不可变形的非金属夹杂物。给出超高强度钢帘线生产工艺流程、热处理淬火转变温度选择原则及处理后钢丝的力学性能。超高强度帘线钢丝拉拔宜适当减少拉拔道次并增加部分压缩率,钢丝拉拔总压缩率为95.5%~97.5%,部分压缩率为14%~16%比较合适。超高强度帘线钢丝比高强度帘线钢丝抗拉强度提高约9%,但扭转值降低15%左右,合成帘线后,帘线线密度下降约13%,破断拉力上升为1%。超高强度帘线钢丝可通过调节热处理及拉拔工艺来减少扭转分层现象。

Adding carbon in super-strength steel cord raw material and appropriate chromium to increase the tensile strength and toughness after drawing.Raw material′s center segregation and non-deformable non-metallic inclusion should be controlled to avoid wire breaking.The super-strength steel cord process flow,selection principle of heat treatment,transition temperature,and mechanical property of processed steel are demonstrated.The drawing passes of steel wire for super-strength steel cord should be reduced but part draught should be increased.Total draught 95.5%~97.5% and part draught 14%~16% are available.Comparing with high-strength cord steel wire,the tensile strength of super-strength increased 9% and twist level decreased 15%;after compounding to cord,cord linear density decreased by 13% and breaking force increased by 1%.To adjust heat treatment and drawing process is the way of reducing twisting and delamination.