CN105087886A - Method for producing rotary air conditioner compressor blades - Google Patents
Method for producing rotary air conditioner compressor blades Download PDFInfo
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- CN105087886A CN105087886A CN201510590242.5A CN201510590242A CN105087886A CN 105087886 A CN105087886 A CN 105087886A CN 201510590242 A CN201510590242 A CN 201510590242A CN 105087886 A CN105087886 A CN 105087886A
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Abstract
The invention relates to a method for producing rotary air conditioner compressor blades and belongs to the technical field of compressor materials. The method for producing the rotary air conditioner compressor blades is provided to solve the problem of poor accuracy of prior blades after use. The method comprises the steps of selecting steel materials for rough machining according to the sizes of the rotary air conditioner compressor blades to obtain corresponding blade blank; performing vacuum hardening treatment on the obtained blank, and performing primary annealing after the vacuum hardening treatment; putting the blade blank into a subzero treatment device for subzero treatment after the primary annealing; and performing annealing at least once after the subzero treatment, and then performing finish machining to obtain the finished rotary air conditioner compressor blades. According to the method, the effect on accuracy due to changes of the blade size caused by the fact that excessive retained austenite is converted into martensite can be effectively prevented, and the accuracy effect, service lives and efficiency of the blades can be guaranteed.
Description
Technical field
The present invention relates to a kind of preparation method of rotating air conditioner compressor blade, belong to compressor field of material technology.
Background technology
Rotating air conditioner compressor utilizes the arc surface of blade tip to contact with piston face, cylinder is divided into two closed areas, piston is driven to rotate together during crankshaft rotation, by the change that closed area rotates with piston, carry out continuous print air-breathing-compression-exhaust, complete the working cycle of whole compressor.Improve constantly along with to environmental protection, energy-conservation and consumption reduction requirement, more and more higher requirement is proposed to the Energy Efficiency Ratio of compressor.For reducing blade and piston leakage when rotated, the quality of fit of blade and cylinder, the quality of fit between blade and upper and lower cylinder cap improve further, the precision of blade own also improves thereupon, because rotating air conditioner compressor blade is the part that in such compressor, working accuracy is the highest, its gauge tolerance, width dimensions tolerance, parallelism, verticality, arc generatrix linearity etc. require all to reach " μ " level, generally be 3 μ ~ 5 μ, complete processing is complicated, difficulty of processing is very large, by country row people new high-tech product.And high precision compressor is by improving manufacturing accuracy and the assembly precision of Parts of Compressor, reduces leakage and improving Energy Efficiency Ratio; And assembly precision is by 8 original μ ~ 12 μ, brings up to 4 μ ~ 8 μ.The rotating air conditioner compressor blade product that originally precision is high, the synthesis precision of the thickness of current High Precision Air-conditioning compressor blade, the tolerance of dimension of width, parallelism, planeness is further improved 2 μ, and manufacture difficulty increases further.And in practical set, the large multi-disc of blade adopts grouping apolegamy mode to organize production.But after mounting, the stall of the compressor that occurs now and then, when initial analysis may be blade assernbling, " by mistake grouping ", " by mistake across group " have impact on compressor assembling.Detect supervision although strengthen, but cannot effect a radical cure.On the other hand, mainly still make to occur the phenomenon of stall owing to making the volume of product or precision etc. change after product life-time service due to the thaumatropy of inside.As Chinese patent application (publication number: CN102410225A) discloses a kind of preparation method of compressor blade, the method carries out Tempering and Quenching after the base material chosen is carried out roughing, the condition of Tempering and Quenching is for carry out oil quenching at 920 DEG C ~ 940 DEG C, again at 580 DEG C ~ 650 DEG C high temperings, then air cooling process is carried out, again after precision work, carry out Nitrizing Treatment, obtain the blade of high rigidity.Although it is by improving intensity and the hardness performance of compressor blade after Nitrizing Treatment, decrease the impact that causes because of factors such as frictions to improve quality and the work-ing life of blade, but owing to also there is a certain amount of residual austenite Body components after Quench and temper process, along with the passing of duration of service on the contrary can to martensitic transformation, and make in phase transformation, to have occurred that volume change have impact on the fine dimension change of blade, precision of blades is reduced, thus causes the problems such as compressor " stall " phenomenon.
Summary of the invention
The present invention is directed to above problems of the prior art, provide a kind of preparation method of rotating air conditioner compressor blade, the problem of solution how to improve rotating air conditioner compressor precision of blades effect.
The object of the invention is to be achieved by the following technical programs, a kind of preparation method of rotating air conditioner compressor blade, the method comprises the following steps:
A, size according to rotating air conditioner compressor blade, choose steel and carry out roughing, obtain corresponding blade blank;
B, the blank obtained is carried out vacuum hardening process, after vacuum hardening process terminates, carry out first time temper; After temper terminates for the first time, blade blank is put into cryogenic treatment apparatus and carries out sub-zero treatment;
After C, sub-zero treatment terminate, then carry out temper at least one times, then, carry out precision work, obtain finished product rotating air conditioner compressor blade.
The preparation method of rotating air conditioner compressor blade of the present invention, in order to solve because steel blade also exists a certain amount of residual austenite Body components after only passing through Quench and temper process, along with the passing of duration of service on the contrary can to martensitic transformation, and make in phase transformation, to have occurred that volume change have impact on the fine dimension change of blade, thus cause compressor " stall " phenomenon, the present inventor is through studying discovery for a long period of time, due to after vacuum hardening, thermal stresses is very large, therefore, the effect of destressing first must be reached through temper, thus realize the strength property ensureing compressor blade, then, again through content that sub-zero treatment object is to reduce residual austenite in compressor blade, improve martensitic content ratio, thus can effectively solve because As time goes on making blade interior undergo phase transition phenomenon and occur blade volume change, the defect that precision reduces, ensure that the high precision effect of compressor blade of the present invention, after sub-zero treatment, the content of the low body difficult to understand of the remnants in compressor blade at least can be reduced within 2%, then, more effectively can prevent the internal stress that produces in sub-zero treatment process through temper at least one times, reach the effect of more effective removal internal stress, ensure the performance of product.
In the preparation method of above-mentioned rotating air conditioner compressor blade, as preferably, the temperature of sub-zero treatment described in step B is-160 DEG C ~-100 DEG C.Object is to improve martensitic content ratio in rotating air conditioner compressor blade further, reduces the content ratio of residual austenite, the content ratio of residual austenite in rotating air conditioner compressor blade can be made to be reduced within 1%.As further preferred, sub-zero treatment described in step B is specially: first make greenhouse cooling to-60 DEG C ~-40 DEG C by the mode of indirect heat transfer, then, more direct liquid nitrogen is passed in cryogenic treatment apparatus make greenhouse cooling carry out sub-zero treatment 2 ~ 4 hours to-160 DEG C ~-100 DEG C.Object is in order to avoid the too fast internal stress of blade that causes of lowering the temperature increases, and effectively can prevent internal stress in sub-zero treatment process from producing excessive, reduce follow-up temper operation, both simplified technological operation, effectively can realize again the effect of saving energy and reduce the cost.
In the preparation method of above-mentioned rotating air conditioner compressor blade, steel described in steps A adopts high speed steel material, and as preferably, steel described in steps A is selected from W6Cr5Mo4V2 rapid steel or W18Cr4V rapid steel.Adopt these high speed steel materials not only to have good wear resistance, and itself also there is good red hardness energy, be conducive to the capability and performance ensureing product.
In the preparation method of above-mentioned rotating air conditioner compressor blade, as preferably, the temperature of the process of vacuum hardening described in step B is 1000 DEG C ~ 1300 DEG C.By quench hot processing intent in order to make internal organizational structure in rapid steel to martensitic transformation, improve martensitic content ratio.
In the preparation method of above-mentioned rotating air conditioner compressor blade, as preferably, first time described in step B the temperature of temper be 500 DEG C ~ 600 DEG C.Being to remove the internal stress produced in vacuum hardening process by high tempering processing intent, improving the strength property of product.
In the preparation method of above-mentioned rotating air conditioner compressor blade, as preferably, described in step C, the number of times of temper is three times at least one times, and the temperature of each temper is 500 DEG C ~ 600 DEG C, 1.0 ~ 2.0 hours time of temper.Combined with sub-zero treatment by repeatedly temper, can ensure to reduce in blade can realize again effectively removing the internal stress in blade while residual austenite content, ensure that strength property.
In sum, the present invention compared with prior art, has the following advantages:
The preparation method of rotating air conditioner compressor blade of the present invention, combined with sub-zero treatment by repeatedly temper, the content ratio of residual austenite in blade is made to be reduced within 2%, thus make in use effectively avoid because the existence of too much residual austenite is converted into martensite and blade volume size changed and affects the problem of precision, the precision effect of rotating air conditioner compressor blade of the present invention can be ensured, improve work-ing life and the efficiency of compressor.
Embodiment
Embodiment 1
According to the dimensional requirement of rotating air conditioner compressor blade, select suitable section bar, W18Cr4V rapid steel section bar is adopted in the present embodiment, W18Cr4V high speed steel material that is cold rolling or hot rolling can be adopted, the W18Cr4V rapid steel Surface of profile chosen is deoiled, decontamination process, and then clear clean with water punching, after drying, then carry out roughing, be processed into corresponding rotating air conditioner compressor blade blank, again the blade blank obtained is put into vacuum quencher carry out and temperature controlled carry out vacuum hardening process 30 minutes at 1000 DEG C, after vacuum hardening process terminates, after adopting the mode of air cooling to cool, then, rotating air conditioner compressor blade blank to be transferred in tempering stove first time temper, first time, the temperature of temper was 500 DEG C, and the time of temper is 2.5 hours, after temper terminates, carry out cooling process be cooled to room temperature with 5 DEG C/min ~ 10 DEG C/min speed, rotating air conditioner compressor blade blank is put into cryogenic treatment apparatus, first by the heat transfer pipe in cryogenic treatment apparatus, and using liquid nitrogen as cooling fluid, the mode of carrying out indirectly lowering the temperature makes the greenhouse cooling extremely-60 DEG C in cryogenic treatment apparatus, cooling rate is 5 DEG C/min ~ 8 DEG C/min, then, direct being passed in cryogenic treatment apparatus by liquid nitrogen makes the temperature in cryogenic treatment apparatus continue to be cooled to-100 DEG C again, and maintain the temperature at-100 DEG C and carry out sub-zero treatment 2 hours, after sub-zero treatment terminates, be warming up to room temperature, take out and again put into tempering stove through the rotating air conditioner compressor blade blank of sub-zero treatment and carry out three temper, the temperature of each temper is 550 DEG C, and the time of temper is 1.0 hours, after three times temper terminates, carry out precision work process, obtain finished product rotating air conditioner compressor blade.
Embodiment 2
According to the dimensional requirement of rotating air conditioner compressor blade, select suitable section bar, W6Cr5Mo4V2 rapid steel section bar is adopted in the present embodiment, W6Cr5Mo4V2 high speed steel material that is cold rolling or hot rolling can be adopted, the W6Cr5Mo4V2 rapid steel Surface of profile chosen is deoiled, decontamination process, and then clear clean with water punching, after drying, then carry out roughing, be processed into corresponding rotating air conditioner compressor blade blank, again the blade blank obtained is put into vacuum quencher carry out and temperature controlled carry out vacuum hardening process 25 minutes at 1300 DEG C, after vacuum hardening process terminates, after adopting the mode of air cooling to cool, then, rotating air conditioner compressor blade blank to be transferred in tempering stove first time temper, the temperature of temper is 600 DEG C for the first time, and the time of temper is 2.0 hours, after temper terminates, carry out cooling process be cooled to room temperature with 5 DEG C/min ~ 10 DEG C/min speed, rotating air conditioner compressor blade blank is put into cryogenic treatment apparatus, first by the heat transfer pipe in cryogenic treatment apparatus, and using liquid nitrogen as cooling fluid, the mode of carrying out indirectly lowering the temperature makes the greenhouse cooling extremely-40 DEG C in cryogenic treatment apparatus, cooling rate is 5 DEG C/min ~ 8 DEG C/min, then, direct being passed in cryogenic treatment apparatus by liquid nitrogen makes the temperature in cryogenic treatment apparatus continue to be cooled to-160 DEG C again, and maintain the temperature at-160 DEG C and carry out sub-zero treatment 3.0 hours, after sub-zero treatment terminates, be warming up to room temperature, take out and again put into tempering stove through the rotating air conditioner compressor blade blank of sub-zero treatment and carry out three temper, the temperature of each temper is 600 DEG C, and the time of temper is 2.0 hours, after three times temper terminates, carry out precision work process, obtain finished product rotating air conditioner compressor blade.
Embodiment 3
According to the dimensional requirement of rotating air conditioner compressor blade, select suitable section bar, W6Cr5Mo4V2 rapid steel section bar is adopted in the present embodiment, W6Cr5Mo4V2 high speed steel material that is cold rolling or hot rolling can be adopted, the W6Cr5Mo4V2 rapid steel Surface of profile chosen is deoiled, decontamination process, and then clear clean with water punching, after drying, then carry out roughing, be processed into corresponding rotating air conditioner compressor blade blank, again the blade blank obtained is put into vacuum quencher carry out and temperature controlled carry out vacuum hardening process 20 minutes at 1100 DEG C, after vacuum hardening process terminates, after adopting the mode of air cooling to cool, then, rotating air conditioner compressor blade blank to be transferred in tempering stove first time temper, first time, the temperature of temper was 550 DEG C, and the time of temper is 1.5 hours, after temper terminates, carry out cooling process be cooled to room temperature with 5 DEG C/min ~ 10 DEG C/min speed, rotating air conditioner compressor blade blank is put into cryogenic treatment apparatus, first by the heat transfer pipe in cryogenic treatment apparatus, and using liquid nitrogen as cooling fluid, the mode of carrying out indirectly lowering the temperature makes the greenhouse cooling extremely-50 DEG C in cryogenic treatment apparatus, cooling rate is 5 DEG C/min ~ 8 DEG C/min, then, direct being passed in cryogenic treatment apparatus by liquid nitrogen makes the temperature in cryogenic treatment apparatus continue to be cooled to-120 DEG C again, and maintain the temperature at-120 DEG C and carry out sub-zero treatment 2.5 hours, after sub-zero treatment terminates, be warming up to room temperature, take out and again put into tempering stove through the rotating air conditioner compressor blade blank of sub-zero treatment and carry out double tempering process, the temperature of each temper is 500 DEG C, and the time of temper is 3.0 hours, after double tempering process terminates, carry out precision work process, obtain finished product rotating air conditioner compressor blade.
Embodiment 4
According to the dimensional requirement of rotating air conditioner compressor blade, select suitable section bar, W18Cr4V rapid steel section bar is adopted in the present embodiment, W18Cr4V high speed steel material that is cold rolling or hot rolling can be adopted, the W18Cr4V rapid steel Surface of profile chosen is deoiled, decontamination process, and then clear clean with water punching, after drying, then carry out roughing, be processed into corresponding rotating air conditioner compressor blade blank, again the blade blank obtained is put into vacuum quencher carry out and temperature controlled carry out vacuum hardening process 30 minutes at 1200 DEG C, after vacuum hardening process terminates, after adopting the mode of air cooling to cool, then, rotating air conditioner compressor blade blank to be transferred in tempering stove first time temper, first time, the temperature of temper was 580 DEG C, and the time of temper is 2.0 hours, after temper terminates, carry out cooling process be cooled to room temperature with 5 DEG C/min ~ 10 DEG C/min speed, rotating air conditioner compressor blade blank is put into cryogenic treatment apparatus, first by the heat transfer pipe in cryogenic treatment apparatus, and using liquid nitrogen as cooling fluid, the mode of carrying out indirectly lowering the temperature makes the greenhouse cooling extremely-55 DEG C in cryogenic treatment apparatus, cooling rate is 5 DEG C/min ~ 8 DEG C/min, then, direct being passed in cryogenic treatment apparatus by liquid nitrogen makes the temperature in cryogenic treatment apparatus continue to be cooled to-130 DEG C again, and maintain the temperature at-130 DEG C and carry out sub-zero treatment 2.0 hours, after sub-zero treatment terminates, be warming up to room temperature, take out and again put into tempering stove through the rotating air conditioner compressor blade blank of sub-zero treatment and carry out double tempering process, the temperature of each temper is 530 DEG C, and the time of each temper is 2.0 hours, after double tempering process terminates, carry out precision work process, obtain finished product rotating air conditioner compressor blade.
Embodiment 5
According to the dimensional requirement of rotating air conditioner compressor blade, select suitable section bar, W18Cr4V rapid steel section bar is adopted in the present embodiment, W18Cr4V high speed steel material that is cold rolling or hot rolling can be adopted, the W18Cr4V rapid steel Surface of profile chosen is deoiled, decontamination process, and then clear clean with water punching, after drying, then carry out roughing, be processed into corresponding rotating air conditioner compressor blade blank, again the blade blank obtained is put into vacuum quencher carry out and temperature controlled carry out vacuum hardening process 40 minutes at 1050 DEG C, after vacuum hardening process terminates, after adopting the mode of air cooling to cool, then, rotating air conditioner compressor blade blank to be transferred in tempering stove first time temper, first time, the temperature of temper was 510 DEG C, and the time of temper is 3.0 hours, after temper terminates, carry out cooling process be cooled to room temperature with 5 DEG C/min ~ 10 DEG C/min speed, rotating air conditioner compressor blade blank is put into cryogenic treatment apparatus, first by the heat transfer pipe in cryogenic treatment apparatus, the inlet pipe of described heat transfer pipe cooling fluid to the pipe diameter of the outlet pipe of cooling fluid in the design increased gradually, liquid nitrogen vaporization is made by the change of heat transfer pipe caliber, release the form of vaporization heat, thus effectively can avoid the too fast increase causing blade internal stress of lowering the temperature, and using liquid nitrogen as cooling fluid, the mode of carrying out indirectly lowering the temperature makes the greenhouse cooling extremely-45 DEG C in cryogenic treatment apparatus, cooling rate is 5 DEG C/min ~ 8 DEG C/min, then, direct being passed in cryogenic treatment apparatus by liquid nitrogen makes the temperature in cryogenic treatment apparatus continue to be cooled to-110 DEG C again, and maintain the temperature at-110 DEG C and carry out sub-zero treatment 3.0 hours, after sub-zero treatment terminates, be warming up to room temperature, take out and again put into tempering stove through the rotating air conditioner compressor blade blank of sub-zero treatment and carry out three temper, the temperature of each temper is 540 DEG C, and the time of each temper is 2.0 hours, after three times temper terminates, carry out precision work process, obtain finished product rotating air conditioner compressor blade.
Embodiment 6
According to the dimensional requirement of rotating air conditioner compressor blade, select suitable section bar, W18Cr4V rapid steel section bar is adopted in the present embodiment, W18Cr4V high speed steel material that is cold rolling or hot rolling can be adopted, the W18Cr4V rapid steel Surface of profile chosen is deoiled, decontamination process, and then clear clean with water punching, after drying, then carry out roughing, be processed into corresponding rotating air conditioner compressor blade blank, again the blade blank obtained is put into vacuum quencher carry out and temperature controlled carry out vacuum hardening process 1.0 minutes at 1250 DEG C, after vacuum hardening process terminates, after adopting the mode of air cooling to cool, then, rotating air conditioner compressor blade blank to be transferred in tempering stove first time temper, first time, the temperature of temper was 560 DEG C, and the time of temper is 2.0 hours, after temper terminates, carry out cooling process be cooled to room temperature with 5 DEG C/min ~ 10 DEG C/min speed, rotating air conditioner compressor blade blank is put into cryogenic treatment apparatus, first by the heat transfer pipe in cryogenic treatment apparatus, the inlet pipe of described heat transfer pipe cooling fluid to the pipe diameter of the outlet pipe of cooling fluid in the design increased gradually, liquid nitrogen vaporization is made by the change of heat transfer pipe caliber, release the form of vaporization heat, thus effectively can avoid the too fast increase causing blade internal stress of lowering the temperature, and using liquid nitrogen as cooling fluid, the mode of carrying out indirectly lowering the temperature makes the greenhouse cooling extremely-50 DEG C in cryogenic treatment apparatus, cooling rate is 5 DEG C/min ~ 8 DEG C/min, then, direct being passed in cryogenic treatment apparatus by liquid nitrogen makes the temperature in cryogenic treatment apparatus continue to be cooled to-120 DEG C again, and maintain the temperature at-120 DEG C and carry out sub-zero treatment 2.0 hours, after sub-zero treatment terminates, be warming up to room temperature, take out and again put into tempering stove through the rotating air conditioner compressor blade blank of sub-zero treatment and carry out three temper, the temperature of each temper is 550 DEG C, and the time of each temper is 2.0 hours, after three times temper terminates, carry out precision work process, obtain finished product rotating air conditioner compressor blade.
The rotating air conditioner compressor blade that random selecting above-described embodiment 1-6 obtains carries out corresponding performance test respectively, through macrocyclic test, all dimensional change <0.001mm can be ensured, the performance need of compressor can be met, and without the blade of sub-zero treatment, in long period test, dimensional change is more than 0.003mm ~ more than 0.005mm.Test result display after life-time service, precision of the present invention still can keep, after using for a long time, substantially there will not be volume change phenomenon, uses on the compressor, not easily occurs stall phenomenon.
Specific embodiment described in the present invention is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present invention or surmount the scope that appended claims defines.
Although made a detailed description the present invention and quoted some specific embodiments as proof, to those skilled in the art, only otherwise it is obvious for leaving that the spirit and scope of the present invention can make various changes or revise.
Claims (7)
1. a preparation method for rotating air conditioner compressor blade, is characterized in that, the method comprises the following steps:
A, size requirement according to rotating air conditioner compressor blade, choose steel and carry out roughing, obtain corresponding rotating air conditioner compressor blade blank;
B, the blank obtained is carried out vacuum hardening process, after vacuum hardening process terminates, carry out first time temper; After temper terminates for the first time, blade blank is put into cryogenic treatment apparatus and carries out sub-zero treatment;
After C, sub-zero treatment terminate, then carry out temper at least one times, then, carry out precision work, obtain finished product rotating air conditioner compressor blade.
2. the preparation method of rotating air conditioner compressor blade according to claim 1, it is characterized in that, the temperature of sub-zero treatment described in step B is-160 DEG C ~-100 DEG C.
3. the preparation method of rotating air conditioner compressor blade according to claim 2, it is characterized in that, sub-zero treatment described in step B is specially:
First make greenhouse cooling to-60 DEG C ~-40 DEG C by the mode of cooling indirectly, then, more direct being passed in cryogenic treatment apparatus by liquid nitrogen makes greenhouse cooling carry out sub-zero treatment 2 ~ 4 hours to-160 DEG C ~-100 DEG C.
4. the preparation method of rotating air conditioner compressor blade according to claim 1-3 any one, it is characterized in that, steel described in steps A is selected from W6Cr5Mo4V2 rapid steel or W18Cr4V rapid steel.
5. the preparation method of rotating air conditioner compressor blade according to claim 1-3 any one, it is characterized in that, the temperature of the process of vacuum hardening described in step B is 1000 DEG C ~ 1300 DEG C.
6. the preparation method of rotating air conditioner compressor blade according to claim 1-3 any one, is characterized in that, first time described in step B the temperature of temper be 500 DEG C ~ 600 DEG C.
7. the preparation method of rotating air conditioner compressor blade according to claim 1-3 any one, described in step C, the number of times of temper is three times at least one times, and the temperature of each temper is 500 DEG C ~ 600 DEG C, 1.0 ~ 2.0 hours time of temper.
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| CN105382503A (en) * | 2015-12-17 | 2016-03-09 | 沈阳鼓风机集团齿轮压缩机有限公司 | Machining method and device of compressor inlet guide blade |
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| CN107447085A (en) * | 2017-08-19 | 2017-12-08 | 成都市联余精密机械有限公司 | A kind of curve special forming parts position Light deformation controls Technology for Heating Processing |
| CN109972077A (en) * | 2017-12-22 | 2019-07-05 | 通用电气阿维奥有限责任公司 | Nitriding process for carburizing Ferrium steel |
| CN109972077B (en) * | 2017-12-22 | 2021-10-29 | 通用电气阿维奥有限责任公司 | Nitriding process for carburizing Ferrium steel |
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| CN109971926A (en) * | 2019-03-05 | 2019-07-05 | 沈阳透平机械股份有限公司 | A kind of heat treatment method of compressor ultralow temperature high strength steel |
| CN111441011A (en) * | 2020-04-13 | 2020-07-24 | 河北太行机械工业有限公司 | Nitriding treatment process for high-speed steel tool |
| CN111850244A (en) * | 2020-07-31 | 2020-10-30 | 滁州市汊河之星高新技术研发有限公司 | Preparation method of heat pump electric automobile air conditioner compressor blade |
| CN111774573A (en) * | 2020-08-06 | 2020-10-16 | 滁州市汊河之星高新技术研发有限公司 | Manufacturing method of suction valve plate of vortex type automobile air conditioner compressor |
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