Improvement of stretch flangeability of ultra high strength steel sheet by smoothing of sheared edge
Improvement of stretch flangeability of ultra high strength steel sheet by smoothing of sheared edge
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DOI：
10.1016/j.jmatprotec.2009.11.014
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发表时间：
2010-03-01
影响因子：
6.3
通讯作者：
Suzui, Yoshio
中科院分区：
文献类型：
--
作者：
Mori, Ken-ichiro;Abe, Yohei;Suzui, Yoshio
通过改善剪边质量，提高了小延性超高强钢板的拉伸翻边性。剪边油质量对高强度钢板拉伸翻边性的影响，采用锥形冲床对剪孔进行了扩孔试验。剪切边缘的质量随冲头之间的间隙和质量影响限制膨胀率的测量表明表面剪切边缘的限制膨胀率超高强度钢板剪切依赖石油的宏观不均匀和硬度剪切边缘而不是微观宏观不均匀的韧性剪切边缘被平滑消除边缘与锥形穿孔发现剪切边缘的平滑可以有效地提高超高强度钢板的拉伸翻边性(C) 2009 Elsevier B.V.
Stretch flangeability of an ultra high strength steel sheet having small ductility was increased by improving quality Of a sheared edge The effect of the quality of the sheared edge oil the stretch flangeability of the high strength steel sheets was examined from expansion of a sheared hole with a conical punch. The quality of the sheared edge varied with the clearance between the punch and the quality Influenced the limiting expansion ratio It was shown from measurement Of Surface of the sheared edge that the limiting expansion ratio of the sheared ultra high strength steel sheet is dependent oil the Macroscopic unevenness and hardness of the sheared edge and not on the microscopic toughness The macroscopic unevenness of the sheared edge was eliminated by smoothing the edge with a conical punch It was found that the smoothing of the sheared edge is effective in improving the stretch flangeability of the ultra high strength steel sheet (C) 2009 Elsevier B.V. All rights reserved