Zinc-induced crack-resistant steel sheet and manufacturing method thereof
A manufacturing method and steel plate technology, applied in the direction of manufacturing tools, coatings, furnace types, etc., can solve the problems of zinc-induced crack resistance and non-involvement of steel plates, etc.
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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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