Treatment process for improving comprehensive properties by alloying surface of sucker rod
A technology of surface alloying and comprehensive performance, applied in metal material coating process, heat treatment furnace, heat treatment equipment, etc., can solve the problems of sucker rod corrosion and fracture, pile up of scrap rods, shortened service life, etc., and achieve economic benefits Considerable, outstanding innovation, improved thermal hardness and high temperature oxidation resistance
Inactive Publication Date: 2011-10-05
DAQING HI TECH ZONE NORTH OIL VENTURE TECH
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Problems solved by technology
In addition, the polished rod is also corroded by the packing during work, and the packing hardness, roughness, hard scale particles, etc. accelerate the wear rate
[0003] Extremely harsh service conditions caused corrosion and fracture of sucker rods, shortened service life, and piled up scrapped rods, resulting in huge waste
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[0017] Below in conjunction with accompanying drawing, the present invention will be further described:
[0018] A high-comprehensive-performance modification treatment process for the surface alloying of sucker rods, the specific steps of which are as follows:
[0019] 1. The surface of the sucker rod workpiece is treated by sandblasting, derusting and pickling, so that the surface is oil-free and rust-free;
[0020] 2. Calculated according to the weight percentage, take 95% chromium powder, 1% ammonium chloride and 4% ferric chloride, make a paste with hydrolyzed ethyl silicate, and coat it on the surface of the workpiece with a coating thickness of 0.25mm; after drying , under argon protection, high-frequency current induction heating to 1200 ° C, heat preservation for 2 minutes;
[0021] 3. Pre-cool the sucker rod to 820°C for quenching and water cooling;
[0022] 4. Heat to 180°C, temper for 2.5 hours, and air cool to room temperature.
[0023] The structure of the suc...
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The invention relates to a treatment process for improving comprehensive properties by alloying the surface of a sucker rod, which comprises the following steps: pretreatment of sucker rod: taking 95 wt% of chromium powder, 1 wt% of ammonium chloride and 4 wt% of iron chloride, hydrolyzing with ethyl silicate to obtain a paste, and applying the paste onto the surface of a workpiece, wherein the coating thickness is 0.25mm; drying, carrying out high-frequency current induction heating to 1200 DEG C in an argon atmosphere, and keeping the temperature for 2 minutes; precooling the sucker rod to 810-830 DEG C, and carrying out oil quenching or water quenching; and finally, heating to 160-200 DEG C, tempering for 2-3 hours, and cooling in air to room temperature. The treatment process convertsthe surface of the sucker rod into stainless steel, and greatly enhances the corrosion resistance, wear resistance, fatigue strength, red hardness and high-temperature oxidation resistance of the sucker rod, thereby finally achieving the goals of resisting corrosion and prolonging service life.
Description
technical field [0001] The invention relates to a surface treatment process, in particular to a surface treatment process for sucker rods. Background technique [0002] Daqing Oilfield has entered the late stage of high water cut development. In order to improve the recovery rate of old oilfields, polymer injection and ternary fluid injection technologies have been widely used in these oilfields. The application of these technologies has greatly deteriorated the corrosion environment, and the sucker rod The cause of corrosion has become the result of the combined effect of many factors. Its corrosion is mainly electrochemical corrosion, mainly manifested as oxygen concentration corrosion, bacterial corrosion, Cl - Penetrating corrosion product film self-catalyzed accelerated corrosion, microbial corrosion and mechanical corrosion, etc. In addition, the polished rod is also corroded by the packing during work, and the hardness, roughness, and hard scale particles of the pac...
Claims
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Login to View More IPC IPC(8): C23F17/00C23C10/32C21D9/00C21D1/18
Inventor 李福军郭士强窦志坚冯云亭佐丽
Owner DAQING HI TECH ZONE NORTH OIL VENTURE TECH