随着先进高强钢板在汽车及航天航空领域的广泛应用,回弹导致的成形精度问题日益突出.为了获取先进高强钢的弯曲回弹特性,通过采用U形件回弹模型,针对600 MPa级别的3种典型高强钢(DP钢、TRIP钢、HSLA钢)进行了回弹试验研究.实验结果表明:在相同变形条件下,TRIP钢弯曲回弹最大,DP钢次之,HSLA的弯曲回弹最小;不同工艺条件、不同材料性能参数对弯曲回弹呈单调的影响规律,而润滑条件对弯曲回弹的影响趋势并未出现一致性规律.
To investigate the problem of springback of advanced high strength steel ( AHSS) , which has been used widely in automobile and aviation industry, a great deal of physical tests were carried out based on the U-shape springback model to research the springback properties of three kinds of typical steel with the tensile strength of 600 MPa (DP, TRIP and HSLA). Experimental results show that the springback of TRIP steel is the maximum, while that of DP steel is the minimum under the same bending condition. Different process settings and material parameters have monotonic influence on bending spingback respectively. But the influence of different lubricating status on bending spingback does not exhibit the consistency.
参考文献
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