吉林大学学报(工学版) ›› 2017, Vol. 47 ›› Issue (6): 1829-1833.doi: 10.13229/j.cnki.jdxbgxb201706021

• 论文 • 上一篇    下一篇

基于性能梯度分布的硼钢热冲压工艺对形状精度的影响

张志强1, 刘从豪1, 何东野2, 李湘吉2, 李纪萱1   

  1. 1.吉林大学 材料科学与工程学院,长春 130022;
    2.吉林大学 辊锻工艺研究所,长春 130022
  • 收稿日期:2017-03-20 出版日期:2017-11-20 发布日期:2017-11-20
  • 通讯作者: 何东野(1960-),男,副教授,博士.研究方向:金属精密成形技术.E-mail:dyhe_jlu@sina.com
  • 作者简介:张志强(1977-),男,副教授,博士.研究方向:高强度钢板冲压成形.E-mail:zhangzq@jlu.edu.cn
  • 基金资助:
    国家自然科学基金项目(51205162, 51275203); 吉林大学研究生创新基金项目(2017184)

Effect of hot stamping process of boron steel on shape precision based on performance gradient distribution

ZHANG Zhi-qiang1, LIU Cong-hao1, HE Dong-ye2, LI Xiang-ji2, LI Ji-xuan1   

  1. 1.College of Materials Science and Engineering, Jilin University, Changchun 130022, China;
    2.Roll Forging Institute, Jilin University, Changchun 130022, China
  • Received:2017-03-20 Online:2017-11-20 Published:2017-11-20

摘要: 为探究性能梯度分布的热冲压零件的回弹机理,采用模具分区加热技术,对USIBOR 1500P硼钢板进行U形件热冲压试验,并采用NDI三坐标测量仪PRO CMM3500分析了不同保压压力和模具温度下冲压件热区、冷区及过渡区的回弹规律,零件组织采用扫描电子显微镜进行观察。试验发现:随着保压压力的增大,热区、冷区和过渡区的回弹角均减小;随着模具温度的升高,冷区回弹角基本不变,热区和过渡区回弹角均减小,且过渡区的回弹程度在同样条件下比冷区和热区小。组织分析结果表明:马氏体组织越多回弹越大,贝氏体组织越多回弹越小。

关键词: 材料合成与加工工艺, 硼钢, 热冲压, 回弹, 显微组织

Abstract: In order to study the springback mechanism of quenched boron steel with tailored properties, hot stamping experiments of U shape part were conducted using partial die method. A three-coordinate measuring machine NDI PROCMM3500 was used to measure the shape precision of the quenched parts at different holding pressures and die temperatures. The microstructure of the quenched parts were observed using SEM. Results show that the springback angles of the hot region, cold region and transition region decrease as the holding temperatures increases. As the die temperature increases the springback angle of the cold region remains unchanged, but the springback angles of the hot region and transition region decrease. Microstructure analysis suggested that more martensite will cause bigger springback angle, while more bainite will cause smaller springback angle.

Key words: material synsthesis and processing technology, boron steel, hot stamping, springback, microstructure

中图分类号: 

  • TG306
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