钢丝铅淬火前压缩率对成品力学性能的影响

在生产抗拉强度不小于1 800 MPa的φ4.40 mm制绳钢丝时,产品的力学性能合格率低。采用加大钢丝铅淬火前总压缩率的方法,用82Aφ11.0 mm盘条代替φ8.0 mm盘条,拉拔φ7.65 mm钢丝,钢丝铅淬火前拉拔总压缩率从8.56%增加到51.63%,热处理后的φ7.65 mm半成品钢丝抗拉强度由1 278 MPa提高到1 376 MPa,延伸率从6%提高到10%;成品抗拉强度从1 675 MPa提高到1 862 MPa,扭转次数从14次提高到22次,弯曲次数从8次提高到13次,成品合格率达到88%。

Effect of draught before steel wire patenting on mechanical properties of finished product

The mechanical properties pass rate of the products are low as to produce tensile strength no less than 1 800 MPa and diameter 4.40 mm steel wire for rope. The pass rate reach 88% by adopting adding total draught before patenting, 82A steel diameter 11.0 mm wire rod was drawn into diameter 7.65 mm, the total draught of steel wire before patenting increased from 8.56% to 51.63%, the tensile strength of diameter 7.65 mm semi-finished steel wire increased from 1 278 MPa to 1 376 MPa , the elongation increased from 6% to 10% after heat treatment; the tensile strength of finished steel wire increased from 1 675 MPa to 1 862 MPa, torsion numbers increased from 14 times to 22 times, bend numbers increased from 8 times to 13 times.