Method for producing large-specification Ti55531 alloy pancake
A ti55531, large-scale production technology, applied in the field of titanium alloy forging, can solve the problems of difficulty in obtaining uniform, high fracture toughness, large deformation resistance, etc., achieve good mechanical properties matching, reduce anisotropic difference, and ensure the effect of material strength
Active Publication Date: 2018-01-19
湖南湘投金天钛业科技股份有限公司
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The invention discloses a method for producing a large-specification Ti55531 alloy pancake. The method comprises the steps of cogging forging, intermediate forging, finished product forging and heat treatment. According to the method for producing the large-specification Ti55531 alloy pancake, a '' high + low + high + low '' forging process route is adopted, forging permeability of a blank is ensured by applying large-tonnage pressure provided by an 80 MN press, deformation of a single-phase area is large, and the deformation of the two-phase area is small; a single-phase area upsetting and drawing deformation is adopted as the main, meanwhile, forging deformation modes such as reversing upsetting and drawing and flat-square upsetting and drawing are introduced, anisotropy difference of materials is greatly reduced, the proper heat treatment is carried out, so that microstructure of the alloy is of a incomplete spheroidization state, the microstructure of the alloy is distinguished from a fully equiaxed structure, a microstructure which can coexist with beta-turn + equiaxed alpha + short rod-shaped alpha is obtained, so that fracture toughness is improved while the strength of thematerial is guaranteed, and good mechanical property matching is achieved.
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