The explosion-proof valve body casting method

The present invention discloses an explosion-proof valve body casting method, comprising the steps of: a, pouring valve, the control valve chemical composition as percentages by weight: 2.32% ≤C≤4.15%, 0.40% ≤Si≤1.40%, 0.30% ≤Mn≤1.30%, 0.010% ≤P≤0.030%, 0.010% ≤S≤0.030%. 1.50% ≤Cr≤2.50%, trace ≤B≤0.0018%, the balance being iron and unavoidable impurities; cast molding body temperature was lowered to 350 ℃, reheated to 670-760 ℃, incubated for 3-5 hours , furnace cooled to 300 ℃, for 4 hours, then heated to 650-760 deg.] C, incubated for 17 hours at 50 ℃ / h was cooled to 400 ℃, then at 20 ℃ / h, was cooled to 140 deg.] C; M materials of the present invention and manufacturing process with high production continuity and high utilization ratio, suitable for mass production and reduce costs.