东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2014, Vol. 35 ›› Issue (12): 1778-1782.DOI: 10.12068/j.issn.1005-3026.2014.12.024

• 机械工程 • 上一篇    下一篇

工艺参数对楔横轧4Cr9Si2表面螺旋痕的影响

黄江华， 刘晋平， 王宝雨， 胡正寰   

  1. (北京科技大学 机械工程学院， 北京100083)
  • 收稿日期:2013-09-15 修回日期:2013-09-15 出版日期:2014-12-15 发布日期:2014-09-12
  • 通讯作者: 黄江华
  • 作者简介:黄江华(1981-)，男，湖南永兴人，北京科技大学博士研究生； 王宝雨(1966-)，男，山东成武人，北京科技大学研究员； 胡正寰(1934-)，男，湖北孝感人，北京科技大学教授，博士生导师，中国工程院院士.
  • 基金资助:
    广东登云汽配零件轧制成形院士工作站(2011A090700026)； “现代交通金属材料与加工技术北京实验室”资助项目.

Effect of the Process Parameters on Surface Spiral in Cross Wedge Rolling of 4Cr9Si2

HUANG Jiang-hua， LIU Jin-ping， WANG Bao-yu， HU Zheng-huan   

  1. School of Mechanical Engineering， University of Science and Technology Beijing， Beijing 100083， China.
  • Received:2013-09-15 Revised:2013-09-15 Online:2014-12-15 Published:2014-09-12
  • Contact: LIU Jin-ping
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摘要： 借助DEFORM软件对4Cr9Si2楔横轧成形过程进行了数值模拟，分析了工艺参数对楔横轧4Cr9Si2轧件表面螺旋痕影响规律.结果表明:轧件表面螺旋痕是轧件在成形过程中产生应力状态改变而产生的缺陷.随着成形角增大，表面螺旋痕深度将增加；随着楔尖圆角增大，表面螺旋痕将迅速降低；展宽角对表面螺旋痕影响较小；断面收缩率减小，塑性变形量小，表面螺旋痕将减轻.通过实验验证了有限元模拟的正确性.最后对某型气门进行了模拟和实验，当Ψ=70.84%时，在α=32°，β=7.5°，R=12mm下得到了表面无螺旋痕气门.

关键词: 楔横轧, 4Cr9Si2, 数值模拟, 工艺参数, 表面螺旋痕

Abstract: Cross wedge rolling process of 4Cr9Si2 was simulated by DEFORM software， and the influence of process parameters on surface spiral on cross wedge rolling of 4Cr9Si2 was analyzed. The results showed that the surface spiral was resulted from the variation of stress state which was generated in the process of rolling. As the forming angle increased， the depth of surface spiral increased. The surface spiral decreased after increasing of wedge tip fillet. Effect of stretching angle on the surface spiral was not obvious. When the area reduction decreased， plastic deformation was smaller and the surface spiral reduced. These simulated results were verified by experiments. The process parameters for a certain type of valve were determined to be α=32°，β=7.5°， R=12mm， when area reduction is 70.84%， and valves without surface spiral were experimentally achieved.

Key words: cross wedge rolling, 4Cr9Si2, numerical simulation, process parameters, surface spiral

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