ISSN:1003-8620

CN:42-1243/TF

主管:中信泰富特钢集团股份有限公司

主办:大冶特殊钢有限公司

特殊钢 ›› 2016, Vol. 37 ›› Issue (6): 35-37.

• 工艺技术 • 上一篇    下一篇

DY105高碳钢丝冷拔断裂分析和工艺改进实践

李朋1,陈修君1,郭立波2   

  1. 1 东北特钢集团大连特殊钢有限责任公司1技术中心;
    2 中心实验室,大连116105
  • 收稿日期:2016-06-20 出版日期:2016-12-01 发布日期:2022-07-27
  • 作者简介:李朋(1980-),男,硕士,工程师,特种钢材生产工艺研究。

Analysis on Cold Drawn Fracture of DY105 High Carbon Steel Wire and Practice of Process Improvement

Li Peng1, Chen Xiujun1, Guo Libo2   

  1. 1 Technology Center;
    2 Central Laboratory, Dalian Special Steel Co Ltd, Dongbei Special Steel Group, Dalian 116105
  • Received:2016-06-20 Published:2016-12-01 Online:2022-07-27

摘要: DY105钢丝(/%:0.90C,0.22Si,0.24Mn,0.012P,0.003S,0.002Ti,加入RE 0.10)的冶金工艺流程为40 t EAF-LF-VD-3 t铸锭-开坯180 mm×180 mm-轧制Φ6.5 mm盘条-500℃铅浴淬火-冷拔。DY105钢在冷拔过程出现断裂现象,经分析得出,断裂钢丝中出现部分针状马氏体组织和较多B类、TiN夹杂,是冷拔丝断裂的主要原因。通过将Al线脱氧改进成Al线+Al豆+C粉脱氧,软吹时间从15 min增至20 min,改进稀土加入方式,增加Φ6.5 mm钢丝铅浴时间等工艺措施,避免了该钢冷拔过程的断丝现象。

关键词: DY105高碳钢丝, 冷拔, 断裂, 钢水脱氧, 铅浴淬火

Abstract: The metallurgical process flowsheet for DY105 steel wire (/%: 0.90C, 0. 22Si, 0. 24Mn, 0.012P, 0. 003S, 0. 002Ti, adding RE 0. 10) is 40 t EAF- LF- VD- 3t ingot- breakdown 180 mm x 180 mm billet-rolled to Φ6. 5 mm coil- 500℃ lead bath quenched- Cold Drawn. The phenomenon of fracture of DY 105 steel occurs in cold drawing process, and it is obtained by analysis that partial needle-shaped martensite structure and appreciable B-type and TiN inclusions in fractured wire are main reasons to produce cold drawn fracture of wire. With the process measures including modifying Al wire deoxidation to Al wire + Al shot + C powder deoxidation, increasing soft blowing time from 15 min to 20 min, improving rare earth elements adding method and increasing Φ6.5 mm steel wire lead bath time, the phenomenon of wire fracture of the steel in cold drawn process is avoided.