4140钢热轧调质材生产工艺

Processing Technology of 4140 Steel Hot Rolling Quenched and Tempered Metal

以轧代锻生产φ254mm~φ310mm的大规格4140钢热轧材。通过对调质过程中淬火和回火工艺的控制消除了纵向裂纹的产生,并严格执行均匀45°倒角工艺,有效控制了环形裂纹的产生。所生产钢材的各项指标均达到了用户的要求。

φ254 mm～φ310 mm large size 4140 steel hot rolling metal is produced by rolling instead of forging.By controlling the tempering and quenching process,the longitudinal cracks have been avoided,and meanwhile with strict even 45°chamfering process,the circumferential cracks have been controlled efficiently.The various index of produced steel meet the client＇s requierment.