Zinc-induced-crack-resistant steel plate and manufacturing method thereof
A technology for steel plates and cracks, applied in the field of anti-zinc cracking steel plates and their manufacture, can solve the problems of no zinc-induced cracking of steel plates and no
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[0068] The present invention will be further described below in conjunction with the embodiments and accompanying drawings.
[0069] Refer to Table 1 for the composition of the steel in the embodiment of the present invention, and refer to Table 2 and Table 3 for the manufacturing process of the steel in the embodiment. Table 4 shows the properties of the steel in the embodiment of the present invention.
[0070] Such as figure 1 As shown, the microstructure of the finished steel plate of the present invention is ferrite + finely dispersed and uniformly distributed bainite crystal clusters, the average grain size is controlled below 10 μm, and the microstructure of the welded heat-affected zone is fine and uniform ferrite body + a small amount of pearlite.
[0071] The present invention adopts the combination design of alloy elements and strict control of residual B elements in the steel, and is matched with a suitable TMCP process. While ensuring the excellent mechanical pro...
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