Automatic stamping lower die structure for filter screw plate
A filter and screw plate technology, which is applied in the field of filter screw plate automatic stamping lower die structure, can solve the problems of troublesome material extraction, time-consuming and laborious, and low work efficiency, and achieve convenient material extraction, low manual labor intensity, The effect of improving work efficiency
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[0020] 2. The lower mold body 1 is made of the following mold steel materials:
[0021] a. Steps of pouring mold steel billet
[0022] The weight percentage of each chemical component in the mold steel billet is: carbon 0.26-0.36%, manganese 1.05-1.50%, silicon 0.35-0.60%, phosphorus 0.014-0.034%, sulfur 0.012-0.036%, chromium 0.450-0.65%, molybdenum 0.003-0.006%, nickel 0.001-0.025%, vanadium 0.005-0.015%, copper 0.008-0.025%, nitrogen 0.002-0.005%, the matrix is iron; the temperature of the cast mold steel is lowered to 250 ℃, and the following treatment is repeated three times: Reheat to 650-760°C, hold for 5-6 hours, cool to 280-320°C, hold for 3-5 hours, then heat to 650-690°C, hold for 3-4 hours, cool to 500 at 40°C / hour ℃, and then cooled to 120℃ at 21℃ / hour;
[0023] b. Heat treatment step
[0024] For the mold steel obtained in step a, reheat to 980°C and keep it warm for 1-2 hours, oil-cool it to no higher than 100°C, reheat it to the temperature range of 680°C-...
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