High Strength Bolt Forging Method
A technology of high-strength bolts and bolts, applied in the direction of manufacturing tools, furnace types, heat treatment furnaces, etc., can solve the problems of easy rust and corrosion, fracture or cracks, and the formation of accident sources, and achieve high bolt precision, good plasticity, and improved resistance The effect of tensile strength
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[0018] The present invention will be further described in conjunction with the following examples:
[0019] The high-strength bolt forging method, the processing steps include:
[0020] a. The rod blank is obtained through the casting process, and the weight percentage of each chemical composition of the control rod blank should meet the following requirements: C 0.25~0.35, Mn 0.15~0.25, Si 0.15~0.35, W 0.01-0.04, 0.015≤ P≤0.025, 0.015≤S≤0.035, Ni 0.15~0.20, Ba 0.025~0.045, Sn 0.02~0.03, Mg≤0.02, the balance is iron;
[0021] b. Carry out forging and forming processing on the rod material after casting and forming, the forging temperature is controlled at 630-680°C, and a thin layer of graphite powder is covered on the inner wall of the cavity of the forging mold, and the particle size of the graphite powder is controlled at 200-300 mesh, The number of forging times is not more than 25 times, and the outer thread of the bolt is turned by using a precision lathe after forging;...
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