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 ›› 2009, Vol. 30 ›› Issue (1): 10-12.

• 试验研究 • 上一篇    下一篇

脉冲电流处理方式对45钢凝固组织的影响

张西锋1, 袁守谦1, 魏颖娟1, 邱斌1, 杨拉道2,谢东钢2   

  1. 1西安建筑科技大学冶金工程学院,西安710055;
    2西安重型机械研究所,西安710032
  • 收稿日期:2008-07-10 出版日期:2009-02-01 发布日期:2022-11-29
  • 作者简介:张西锋(1981-),男,硕士研究生,细化晶粒方法的研究

Influence of Pulse Current Treatment Method on Solidified Structure of a 45 Steel

Zhang Xifeng1 , Yuan Shouqian1 , Wei Yingjuan1 , Qiu Bin1 , Yang Ladao2 , Xie Donggang2   

  1. 1 School of Metallurgical Engineering, Xi'an University of Architecture & Technology, Xi'an 710055 ;
    2 Xi'an Heavy Machinery Research Institute, Xi'an 710032
  • Received:2008-07-10 Published:2009-02-01 Online:2022-11-29

摘要: 45钢(0.43%C)在10kg中频感应炉出钢前(凝固前)经2600V、0.862Hz、电容器电容量200μF脉冲电流处理60s和钢水在铸模凝固过程用相同参数的脉冲电流处理3.5min后发现,两种脉冲电流处理方法均能改善钢的凝固组织:增加等轴晶和减少柱状晶数量,并减少魏氏组织,使珠光体片层间距减小;同时改善了钢的成分偏析,碳、硫、磷的偏析指数分别由未经脉冲电流处理的1.257、1.502和1.384降低至脉冲电流处理的1.125~1.194、1.067~1.300、1.227~1.092。

关键词: 脉冲电流处理, 45钢, 凝固组织

Abstract: With pulse current ( 2 600 V, 0. 862 Hz, capacitance of capacitor 200 μF) treated liquid 45 steel (0. 43% C) for 60 s before tapping from 10 kg medium frequency furnace ( before solidification) or with same pulse current treated liquid for 3. 5 min during solidified process in casting mold, it was found that both pulse current treated methods all were able to improve solidified structure of steel, i. e. increased equiaxial crystal, decreased columnar crystal. reduced Widmannstattern structure and decreased interlamellar spacing of pearlite, besides to improve chemical composition segregation ,the segregation index of carbon, sulphur and phosphorus respectively decreased to 1. 125 ~ 1. 194, 1. 067 ~ 1. 300 and 1. 227 ~ 1. 092 with pulse current treatment from 1. 257, 1. 502 and 1. 384 without pulse current treatment.