Method for producing bevel gear with ratchet on end face through powder metallurgy warm forming
A technology of powder metallurgy and helical gears, which is applied in the direction of metal material coating process, coating, furnace type, etc., can solve the problems of material performance not meeting the requirements, poor gear consistency, low material utilization rate, etc., and achieve product Good consistency, suitable for mass production, high material strength
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[0016] Example 2. Take 93.0kg of iron powder, 1.5kg of copper powder, 0.5kg of molybdenum powder, 3.8kg of nickel powder, 0.6kg of natural graphite powder with a purity of 99.80%, and 0.6kg of special lubricant for -325 mesh temperature mold obtained by chemical method, put into After mixing and stirring for 60 minutes in a double-cone high-efficiency mixer, it was put into a mold cavity heated to 75 ° C, and the unit pressing pressure was 7.0 T / cm 2 Rotary pressing to a density of 7.2-7.3 g / cm 3 , make a compact; put the compact in the RST-110 mesh belt sintering furnace, and sinter at 1120° for 40 minutes in the protective atmosphere of hydrogen and nitrogen mixed gas. In the mixed gas of hydrogen and nitrogen, hydrogen accounts for 5% of the volume of the mixed gas, and nitrogen accounts for 95% of the volume of the mixed gas. Carbonitriding at 850°C for 60 minutes in a controlled atmosphere heat treatment furnace, quenching at 850°C, oil cooling at a cooling rate of 110°...
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