东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2010, Vol. 31 ›› Issue (3): 381-384.DOI: -

• 论著 • 上一篇    下一篇

BT303CuS易切削不锈钢轧件劈头的研究

马宝国;徐松乾;赵肃武;刘相华;   

  1. 东北大学轧制技术及连轧自动化国家重点实验室;宝山钢铁股份有限公司特钢事业部;
  • 收稿日期:2013-06-20 修回日期:2013-06-20 发布日期:2013-06-20
  • 通讯作者: -
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(50634030)

Head splits of BT303CuS free-cutting stainless steel workpieces during rolling

Ma, Bao-Guo (1); Xu, Song-Qian (2); Zhao, Su-Wu (2); Liu, Xiang-Hua (1)   

  1. (1) The State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110004, China; (2) Special Steel Department, Baoshan Iron and Steel Co., Ltd., Shanghai 200940, China
  • Received:2013-06-20 Revised:2013-06-20 Published:2013-06-20
  • Contact: Ma, B.-G.
  • About author:-
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摘要： 对BT303CuS易切削不锈钢热轧过程中产生的轧件头部开裂原因进行了分析,发现轧件劈头与钢中硫化物的形态有关,利用热模拟实验研究了加热温度对轧件硫化物形态变化影响,在此基础上确定出最佳加热温度范围是1200～1280℃.同时采取了控制轧件头部冷却水、使用新型导卫及增设工序飞剪等一系列工艺措施,显著减少了轧制缺陷,中间废品率由5.67%下降到1.38%,使宝钢股份特钢事业部长型材生产线形成批量生产该钢的能力.

关键词: 棒线材, 易切削不锈钢, 硫化物, 头部开裂, 加热温度

Abstract: The causes of head splits of a workpiece in hot rolling process of free-cutting stainless steel were analyzed. It was found that there is a relationship between the head splits and morphology of sulphides in the steel. A thermomechanical simulation test was therefore carried out to investigate the effect of reheating temperature on the sulphide morphology, and the optimum range of reheating temperature was determined as 1200~1280°C. Then, some measures were taken to get rid of the heat splits, such as controlling the cooling water at the workpiece head, using the new-type guide/guard system and adding a flying shear to cut the workpiece head. Thus, the intermediate rejection rate was decreased from 5.67% to 1.38%. Now the different rolled products of BT303CuS steel has come into batch production in Baoshan Iron & Steel Co., Ltd..

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