Connecting coating for casting babbitt metal on bearing bush and preparation process of connecting coating
A technology of Babbitt alloy and preparation process, which is applied in the direction of metal material coating process, coating, shaft, etc., can solve the problems of affecting the bonding quality, environmental equipment hazards, outdated and simple methods, etc., to achieve efficient and clean preparation process and improve bonding Powerful, easy-to-use effects
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Embodiment 1
[0030]Bottom tile material: aluminum nickel bronze (CuAl10Fe5Ni5).
[0031](1) Degreasing and decontamination
[0032]Degrease and clean the surface of the bottom tile to be repaired. Use absolute ethanol to clean the area to be repaired and the surrounding coating surface. Wipe 3 times to remove surface oil, dust and other contaminants.
[0033](2) Sandblasting
[0034]Use masking tape to protect the parts that may be sprayed outside the sandblasting range.
[0035]The self-circulating sandblasting machine is used to perform sandblasting on the surface to be repaired. The sandblasting uses 20 mesh white corundum abrasive grains and dry compressed air, the pressure is 0.30MPa, the sandblasting distance is 100mm, and the surface roughness after sandblasting>Ra6.0μm.
[0036](4) Spraying
[0037]① Use flame to preheat the workpiece, the preheating temperature is ≥50℃.
[0038]②Spraying process parameters:
[0039]Use pure copper wire as raw material.
[0040]Supersonic arc spraying: air pressure 0.5MPa, voltage 36...
Embodiment 2
[0044]Base tile material: aluminum alloy (AlSn6Cu).
[0045](1) Degreasing and decontamination
[0046]Degrease and clean the surface of the bottom tile to be repaired. Use absolute ethanol to clean the area to be repaired and the surrounding coating surface. Wipe 3 times to remove surface oil, dust and other contaminants.
[0047](2) Sandblasting
[0048]Use masking tape to protect the parts that may be sprayed outside the sandblasting range.
[0049]A self-circulating sandblasting machine is used to perform sandblasting on the surface to be repaired. For sandblasting, 20 mesh white corundum abrasive grains and dry compressed air are used.
[0050](4) Spraying
[0051]① Use flame to preheat the workpiece, the preheating temperature is ≥50℃.
[0052]②Spraying process parameters:
[0053]Use pure copper wire as raw material.
[0054]Supersonic arc spraying: air pressure 0.5MPa, voltage 38V, current 220A, spraying distance: 110mm, spraying speed: 800mm / s.
[0055]③Coating thickness: 200μm.
[0056]After casting the babb...
Embodiment 3
[0058]Base tile material: steel (45#).
[0059](1) Degreasing and decontamination
[0060]Degrease and clean the surface of the bottom tile to be repaired. Use absolute ethanol to clean the surface to be repaired and the surrounding coating surface, wipe twice to remove surface oil, dust and other contaminants.
[0061](2) Sandblasting
[0062]Use masking tape to protect the parts that may be sprayed outside the sandblasting range.
[0063]The self-circulating sandblasting machine is used to perform sandblasting on the surface to be repaired. The sandblasting uses 16 mesh brown corundum abrasive grains and dry compressed air, the pressure is 0.40MPa, the sandblasting distance is 150mm, and the surface roughness after sandblasting>Ra6.0μm.
[0064](4) Spraying
[0065]① Use flame to preheat the workpiece, the preheating temperature is ≥50℃.
[0066]②Spraying process parameters:
[0067]Use pure copper powder as raw material.
[0068]Supersonic flame spraying: kerosene flow rate: 20L / h, oxygen flow rate: 750L / min,...
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