Flange bolt forging method
A technology of flange bolts and bolts, which is applied in the direction of bolts, threaded fasteners, connecting components, etc., can solve the problems of easy rust and corrosion, breakage or cracks, and the formation of accident sources, and achieve high bolt precision, good plasticity, and improved The effect of tensile strength
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[0017] The present invention will be further described in conjunction with the following examples:
[0018] The flange bolt forging method, the processing steps include:
[0019] 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: C0.25~0.35, Mn0.15~0.25, Si0.15~0.35, W0.01- 0.04, 0.015≤P≤0.025, 0.015≤S≤0.035, Ni0.15~0.20, Ba0.025~0.045, Sn0.02~0.03, Mg≤0.02, the balance is iron;
[0020] b. Carry out forging and forming processing on the rod material after casting. The forging temperature is controlled at 600-650°C. A thin layer of plant ash is covered on the inner wall of the cavity of the forging mold. The particle size of the plant ash is controlled at 200-300 mesh. The number of times is not more than 25 times, and the outer thread of the bolt is turned by using a precision lathe after forging;
[0021] c. Heat treatment, the first time is to hea...
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