Forming method of large TC4 alloy die forging
A die forging and large-scale technology, which is applied in the field of TC4 alloy large-scale die forging forming, can solve the problems of destroying the forging flow line, difficult material filling, and reducing the mechanical properties of the forging, so as to achieve the effect of improving the forming quality.
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[0020] The main chemical element content (percentage by weight) of the alloy is: Al content 5.5%-6.8%, V content 3.5%-4.5%, Fe content ≤ 0.30%, C content ≤ 0.10%, N content ≤ 0.05% , H content ≤ 0.015%, O content ≤ 0.20%, other elements individually ≤ 0.10% and the sum ≤ 0.40%, the balance being Ti.
[0021] The steps of this method are as follows:
[0022] Step 1: Prepare rectangular ring blank
[0023] Take a TC4 alloy bar of a certain specification, put it into an electric furnace, heat it to 30°C below the phase transition point, and keep it warm;
[0024] The bar is taken out, and after upsetting and punching, it is rolled into a rectangular ring billet.
[0025] Step 2: Prepare shaped ring blank
[0026] Return the rectangular ring billet to the furnace and heat it to 30°C below the phase transition point; preheat the tire film to 250°C; put the rectangular ring billet into the tire mold and forge it into a special-shaped ring billet 1, such as figure 1 shown.
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