Preparation method of high-strength and high-conductivity powder metallurgy copper-iron alloy
A technology of copper-iron alloy and powder metallurgy, which is applied in the field of powder metallurgy, can solve the problems of high oxygen content of powder metallurgy copper-iron alloy, segregation of copper-iron alloy composition, and difficult precipitation of iron phase, etc., and achieve high sintering density, uniform distribution of two phases, crystal grainy effect
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Embodiment 1
[0023] a. Weigh 1607.1g of water-atomized copper-iron alloy powder with an average particle size of 2 μm and 123.6 g of copper-phosphorus alloy powder (with a P content of 14wt.%) with an average particle size of 10 μm, and put them into a V-shaped mixer for mixing , the mixing time is 4h, and the uniformly mixed powder is prepared, wherein the mass fraction of Fe is 50%, and the mass fraction of P is 1%.
[0024] b. Put the mixed powder into a silica gel bag, the size of the inner cavity of the bag is 150×100×25mm, package it and put it in a cold isostatic press, the cold isostatic pressure is 100MPa, and the holding time is 90s to obtain 140 ×88×20mm plate green body.
[0025] c. Put the plate green body obtained by cold isostatic pressing into the vacuum sintering furnace, and place a crucible with 1kg of pure titanium powder in the furnace at the same time, vacuumize and carry out vacuum sintering, the vacuum degree is 10 -3 Pa, the sintering temperature is 800°C, and the...
Embodiment 2
[0028] a. Weigh 4897.6g of water-gas co-atomized copper-iron alloy powder with an average particle size of 8 μm and 29.6 g of red phosphorus powder with an average particle size of 50 μm, and put them into a V-shaped mixer for mixing. The mixing time is 4 hours. A uniformly mixed powder was prepared, wherein the mass fraction of Fe was 35%, and the mass fraction of P was 0.6%.
[0029] b. Put the mixed powder into a rubber sheath, the inner cavity size of the sheath is 200×150×30mm, package it and put it in a cold isostatic press, the cold isostatic pressing pressure is 200MPa, and the holding time is 10s to obtain 190× 142×26mm sheet blank.
[0030] c. Put the plate green body obtained by cold isostatic pressing into the vacuum sintering furnace, and place a crucible with 1kg of pure titanium powder in the furnace at the same time, vacuumize and carry out vacuum sintering, the vacuum degree is 10 -2 Pa, the sintering temperature is 920°C, and the holding time is 2h to obtain...
Embodiment 3
[0033] a. Weigh 13769.4g of gas-atomized copper-iron alloy powder with an average particle size of 100μm and 99.1g of copper-phosphorus alloy powder with an average particle size of 20μm (P content is 14wt.%), and put them into a V-shaped mixer for mixing , the mixing time is 4h, and the uniformly mixed powder is prepared, wherein the mass fraction of Fe is 15%, and the mass fraction of P is 0.1%.
[0034] b. Put the mixed powder into the silica gel bag, and the size of the inner cavity of the bag is Packaged and placed in a cold isostatic pressing machine, the cold isostatic pressing pressure is 400MPa, and the holding time is 300s, and the obtained bar blanks.
[0035] c. Put the bar billet obtained by cold isostatic pressing into a vacuum sintering furnace, and place a crucible with 1kg of pure titanium powder in the furnace at the same time, vacuumize for vacuum sintering, and the vacuum degree is 10 -1 Pa, the sintering temperature is 1000°C, and the holding time is...
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