超高强度胎圈钢丝生产工艺探讨

Discussion on Production Technology of Bead Wire with Super-high Tenacity

采用不同牌号国产盘条,设计4个方案工艺路线,试验生产Φ0.93 mm超高强度胎圈钢丝。结果表明:采用C82DA盘条的方案一制备的钢丝抗拉强度明显偏低;相对方案一,采用增大预处理干拉钢丝直径的方案二制备的钢丝抗拉强度达到目标值,但扭转断口出现分层现象;分别采用C82DACr和C92D2盘条的方案三和方案四制备的钢丝抗拉强度均达到目标值,且钢丝扭转断口均不分层。通过增大钢材中的C元素含量或添加Cr元素,可以降低钢丝拉拔应变量,减少拉拔过程中渗碳体的溶解,从而改善超高强度胎圈钢丝的扭转性能。

Using domestic steel wire rod with different grades,4 process schemes were designed to produce Φ0.93 mm bead wire with super-high tenacity.The results showed that the tensile strength of the steel wire prepared by scheme 1 with C82DA wire rod was obviously low.Compared with scheme 1,the tensile strength of the steel wire prepared by scheme 2 which the pretreated dry drawn steel wire with a larger diameter was used reached the target value,but the torsional fracture appeared to be delaminated.The tensile strength of the steel wire prepared by scheme 3 and scheme 4 which used the C82DACr and C92D2 wire rod,respectively,also reached the target value,and the torsional fracture of the steel wire was not stratified.By increasing the content of C element or adding Cr element in steel,the drawing strain of steel wire could be reduced,the dissolution of cementite during the drawing process could be decreased,and the torsional properties of the bead wire with super-high tenacity were improved.