Iron-base powder metallurgy material for high pressure valve and preparation method thereof
An iron-based powder metallurgy and high-pressure valve technology, applied in the field of powder metallurgy, can solve the problems of mottling, poor cold and heat fatigue resistance, poor uniformity of structure, etc., to increase wettability and cohesiveness, and increase fatigue strength and toughness, increase the effect of strength and toughness
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[0016] An iron-based powder metallurgy material for high-pressure valves, made of the following weight (kg) of raw materials: nano-carbonyl iron powder 4.5, fatty acid diamide 1.1, Co15, Ni4.5, Sn2.5, Nb2O5 1.3, Bi2O3 2.5, WC10 , Al2O3 6, TaC5, LaB6 3.5, silane coupling agent kh-550 0.5, 1% sodium carbonate solution, appropriate amount of water, sodium hypophosphite 4.3, polyethylene glycol 0.5, 2Mol / L copper sulfate solution 53, wetting Additive 2.5, iron powder 58;
[0017] The wetting aid is made of the following parts by weight (kg) of raw materials: K2ZrF6 1.5, V2O52.5, nano silver 1.1, TiN 0.4-0.6, MoO3 3.5, nano mica powder 0.8, water 9, polyethylene glycol 0.1; The preparation method is: add polyethylene glycol to water, stir evenly, add nano silver, stir for 25 minutes, ultrasonic dispersion for 3 minutes, then add other remaining ingredients, stir for 14 minutes at 7500 rpm, ultrasonic dispersion for 5 minutes , Stir it in an oil bath at 125°C until it is absolutely dr...
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