Sintering process of Cu-Ni alloy pipe with porous surface
A copper-nickel alloy and porous surface technology, applied in the field of porous surface tube preparation, can solve the problems of long holding time, high price, high equipment requirements, etc., and achieve the effect of improving bonding strength, improving uniformity and low cost
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Embodiment 1
[0013] A mixture of 200g polystyrene and solvent and 300g copper-nickel alloy powder is coated on the outer surface of the base tube copper-nickel alloy tube (BFe10-1-1) with a coating thickness of 0.25mm, and then the tube is rotated horizontally at a speed of 50rad / min, volatilize the volatile substances in the binder, dry it, and then pass reducing gas such as hydrogen in the sintering furnace, sinter at 700°C for 10min, and then drop the temperature to 40°C to obtain a copper-nickel alloy porous surface Tube; the thickness of the porous layer is 0.2 mm, the porosity is 70%, and the pore diameter is 70 μm.
[0014] In said copper-nickel alloy powder, the weight content of copper is 90%, the weight content of nickel is 10%, and the particle size is 300 mesh.
[0015] The boiling heat transfer coefficient measured with acetone is 14 times that of a smooth tube with the same diameter. Using electric heating water as the experimental medium, the boiling heat transfer coefficien...
Embodiment 2
[0018] A mixture of 200g polystyrene and solvent and 200g copper-nickel alloy powder is coated on the outer surface of the base tube copper-nickel alloy tube (BFe10-1-1) with a coating thickness of 0.5mm, and then the tube is rotated horizontally at a speed of 50rad / min, volatilize the volatile substances in the binder, dry it, and then pass reducing gas such as hydrogen in the sintering furnace, sinter at 850°C for 5min, and then drop the temperature to 40°C to obtain a copper-nickel alloy porous surface tube ; The thickness of the porous layer is 0.3 mm, the porosity is 60%, and the pore diameter is 80 μm.
[0019] In said copper-nickel alloy powder, the weight content of copper is 90%, the weight content of nickel is 10%, and the particle size is 200 mesh.
[0020] The boiling heat transfer coefficient measured with acetone is 10 times that of a smooth tube with the same diameter. Using electric heating water as the experimental medium, the boiling heat transfer coefficient...
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