上海交通大学学报

上海交通大学学报（自然版） ›› 2011, Vol. 45 ›› Issue (11): 1653-1656.

• 金属学与金属工艺 • 上一篇    下一篇

1 000 MPa级双相钢薄板极限成形性能

史刚1，王武荣2，羊军1，胡伟2，但文蛟3   

  1. （1.上海汽车集团股份有限公司技术中心， 上海 201804；2.上海大学 材料科学与工程学院，上海200072；3.上海交通大学 船舶海洋与建筑工程学院， 上海 200240）
  • 收稿日期:2010-12-29 出版日期:2011-11-30 发布日期:2011-11-30
  • 基金资助:

    国家自然科学基金资助项目（51005144），上海汽车工业科技发展基金资助项目(0910)

Study on Limit Formability of 1 000 MPa Dual Phase Steel

  1. (1.Technical Center, SAIC Motor, Shanghai 2018041, China; 2. School of Materials Science and Engineering, Shanghai University, Shanghai 200072, China; 3. School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiaotong University, Shanghai 200240, China）
  • Received:2010-12-29 Online:2011-11-30 Published:2011-11-30

摘要： 基于圆筒拉深试验，获得了1 000 MPa级先进高强度钢拉深时破裂的临界点和极限拉延比(LDR).研究了Hill、Barlat和BBC 3种不同屈服准则的数值仿真效果.结果表明：1 000 MPa级双相钢LDR值为2.07，且Barlat屈服准则模拟结果与实际试验相符.对断口进行扫锚电镜（SEM）观测，发现1 000 MPa级双相钢有别于传统板材，其拉深断裂模式为沿板材厚向45°的韧性切向断裂，无明显颈缩现象.

关键词: 双相钢, 成形性能, 剪切型断裂, 拉深

Abstract: Through the cup drawing test, the onset crack and limiting drawing ratio (LDR) of 1 000 MPa dual phase (DP) steel were identified. Three yielding models: Hill, Barlat and BBC were compared in the numerical simulation. The results show that LDR of 1 000 MPa DP steel is 2.07. And Barlat yield criterion is suitable for actual test. Unlike traditional sheet materials whose crack has obvious necking, the crack mode of 1 000 MPa DP is a tensile shear fracture and cracks are on alternating 45° planes, through thickness.

Key words: dual phase steel, formability, tensile shear fracture, deep drawing

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