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Wear Characteristics on Tools in U-shaped Stretch-Bending of Dual-Phase Steel Sheet DP780 |
YUE Dong,SUN Li,YU Zhongqi |
(Shanghai Key Laboratory of Digital Manufacture for ThinWalled Structures, Shanghai Jiaotong University, Shanghai 200240, China) |
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Abstract Finding the most suitable tool material is the main way to reduce the wear on the surface of parts and enhance the life of tools in the advanced high strength steel stamping. This paper investigated the wear resistance and characteristics of different tool materials—V4E(TD), DC53(TD) and DC53(vacuum heat treatment) in U-stretching-bending experiment using DP780.The result shows that the V4E(TD) and DC53(TD) have a good performance on wear resistance, while the DC53 by vacuum heat treatment does not perform well. For the first two inserts, wear mainly occurs in the area of 0°-15°on the die radius. While on the DC53 (vacuum heat treatment), serious wear occurs on both the die radius and flange.
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Received: 11 October 2013
Published: 28 May 2014
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