Bidirectional protecting oil pump plunger and hot spray processing technique for alloy coating of same
An alloy coating and processing technology is applied in the field of bidirectional protection of oil well pump plungers and the thermal spraying processing technology of the plunger alloy coating, which can solve the problems of reducing the normal service life of the pump barrel and other problems, and achieve the saving of alloy powder and tight bonding. , the effect of facilitating the process
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[0015] The alloy coating spraying process on the plunger surface of the AOF two-way protection oil well pump is carried out according to the following procedures:
[0016] 1. Surface pretreatment. The surface of the plunger is roughened with a 100# abrasive belt, and the surface is activated to ensure that the surface is clean and free of oil.
[0017] 2. Preheat. Remove the moisture on the surface of the plunger and increase the temperature of the surface of the plunger, increase the bonding rate of the powder, and avoid the rebound loss caused by excessive powder hitting the cold workpiece. The preheating temperature is generally around 300°C, that is, the color of the plunger surface is almost blue or just blue.
[0018] 3. Pre-spray powder. The plunger surface temperature will eventually rise to 1000°C during the spraying process. When the surface temperature gradually rises above 400°C, the surface metal will be oxidized at a high temperature. In order to prevent thi...
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