Cast titanium slab for use in hot rolling and unlikely to exhibit surface defects, and method for producing same
A manufacturing method and technology for casting billets, applied in the direction of manufacturing tools, metal rolling, welding/welding/cutting items, etc., to achieve the effects of improving energy efficiency, reducing manufacturing costs, and improving yield
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[0067] Hereinafter, the present invention will be described in detail based on examples. Nos. 1 to 24 in Table 1 are examples for plate materials, and Nos. 25 to 31 are examples for wire rods.
[0068] [Table 1]
[0069]
[0070] In the reference examples, examples, and comparative examples shown in No. 1 to No. 21 of Table 1, titanium slabs were produced by electron beam remelting, and casting was performed using square molds. On the other hand, in Examples shown in Nos. 22 to 24 of Table 1, titanium slabs were produced by the plasma arc melting method, and casting was performed using a square mold. After casting, if there is cutting and trimming of the casting skin, the surface layer of the titanium slab is trimmed by cutting, and if there is no cutting trimming, the surface layer is not repaired by cutting, but the surface layer is melted. Thereafter, hot rolling was performed from an ingot having a thickness of 250 mm x a width of 1000 mm x a length of 4500 mm using a...
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