Preparation method of automobile door frame integrally thermoformed by light-weight dissimilar steel
A dissimilar steel and hot forming technology, which is applied in the field of auto parts, can solve the problems of poor formability, surface wrinkles, and easy cracking of high-strength steel, and achieve the effects of high forming accuracy, no springback, and low cost
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[0018] The present invention will be further described below in conjunction with the embodiments and accompanying drawings.
[0019] Such as figure 1 As shown, the whole door frame is divided into five parts, which are respectively a right vertical frame 1, a lower horizontal frame 2, a left vertical frame 3, a left oblique frame 4 and an upper horizontal frame 5. Different high-strength steel plates are used. Figure 1 The middle right vertical frame 1 and left vertical frame 3 are made of hot-formed steel plate 22MnB5, the lower horizontal frame 2 is made of DP590 steel plate, the left oblique frame 4 is made of QP980 steel plate, and the upper horizontal frame 5 is made of IF steel.
[0020] The right vertical frame 1 and the left vertical frame 3 of the present invention are partly made of hot-formed steel plate 22MnB5 with a thickness of 1.5mm produced by Baosteel, whose composition is 0.22C-0.92Mn-0.17Si (wt.%), and whose strength is at the level of 1500MPa , the elong...
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