High-temperature annealing heat treatment process for screw pump rotor bushing

Abstract

The invention discloses a high-temperature annealing heat treatment process for a screw pump rotor bushing. The high-temperature annealing heat treatment process comprises the following operation steps that high-temperature heating operation is carried out on a screw pump rotor bushing assembly to be machined, firstly, calcination heating treatment is carried out, then the screw pump rotor bushing assembly is introduced into an annealing furnace for stress annealing treatment, constant-temperature heating is carried out at a lower temperature, after the screw pump rotor bushing is heated for a period of time, heat preservation and cooling treatment are carried out, and the screw pump rotor bushing is recovered to eliminate the residual stress. According to the high-temperature annealing heat treatment process for the screw pump rotor bushing, the mode of high-temperature calcination and low-temperature heat preservation heating annealing heat treatment is adopted, the integration performance is more excellent, residual stress is better eliminated, the tendency of deformation and cracking is better reduced, the use strength of the screw pump rotor bushing is improved, the internal temperature is conveniently monitored and controlled, the heating effect is stabler and more excellent, the heat treatment effect is excellent, and better use prospects are brought.

Description

technical field [0001] The invention relates to the field of processing a screw pump rotor bush, in particular to a high-temperature annealing heat treatment process for a screw pump rotor bush. Background technique [0002] The high-temperature annealing heat treatment process of the screw pump rotor bushing is a method for processing the screw pump rotor bushing. When the screw pump rotor bushing is processed, it needs to be calcined. After the calcination, it needs to be stress annealed. Eliminate stress, reduce the tendency of deformation and cracking. With the continuous development of science and technology, people have higher and higher requirements for the manufacturing process of the high-temperature annealing heat treatment process of the screw pump rotor bushing. [0003] In the prior art, the patent with the authorized notification number CN201210104300.5 discloses a high-temperature annealing method for manufacturing silicon carbide devices, using an acidic solu...

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Problems solved by technology

[0003] In the prior art, the patent with the authorized notification number CN201210104300.5 discloses a high-temperature annealing method for manufacturing silicon carbide devices, using an acidic solution to clean the ion-implanted SiC wafer; coating a layer of organic compound on the SiC wafer As a protective layer; put the SiC wafer into a high-temperature annealing furnace and fill it with argon as a protective gas; heat the SiC wafer to the first temperature for carbonization of the protective layer; heat the SiC wafer to the second temperature for high-temperature annealing; cooling stage , the advantage is that the carbonized photoresist is used as the protective layer during high temperature annealing, the preparation of the protective layer does not need to use additional equipment, it can be completed in a high temperature furnace, the process is simple, and the cost is low; the protective gas uses argon, and the equipment No exhaust gas treatment system is required; the improved annealing conditions can greatly shorten the process time; it can completely protect the SiC surface from being affected during the high temperature annealing process, and ultimately improve the reliability and yield of the device. The existing screw pump rotor bushing The high-temperature annealing heat treatment process has certain disadvantages in use. First of all, it is more troublesome to operate, the integration performance of heat treatment is poor, the stress cannot be easily eliminated, and deformation is prone to occur, which is not conducive to people's use. In addition, the temperature cannot be controlled very conveniently, and the constant temperature and thermal insulation properties are poor, which has brought certain adverse effects to people's use process. Therefore, we propose a high-temperature annealing heat treatment process for the screw pump rotor bushing