CN110938794A

CN110938794A - Output gear carburizing process and device for wind power generation

Info

Publication number: CN110938794A
Application number: CN201911348043.8A
Authority: CN
Inventors: 孔令佑; 王宽
Original assignee: Nanjing Yuneng Machinery Co Ltd
Current assignee: Nanjing Yuneng Machinery Co Ltd
Priority date: 2019-12-24
Filing date: 2019-12-24
Publication date: 2020-03-31
Anticipated expiration: 2039-12-24
Also published as: CN110938794B

Abstract

The invention discloses a carburizing process and equipment for an output gear for wind power generation, which comprises six process steps of cleaning and coating an anti-seepage agent on a part, charging into a furnace for carburizing, discharging from the furnace to a slow cooling pit, high-temperature tempering, quenching processing and secondary tempering, wherein the part is carburized in a carburizing furnace in the carburizing process. The invention enhances the hardness of the carburized layer and the hardness of the part by tempering twice in the carburization process of the part, and has the effect of improving the product quality of the output gear.

Description

Output gear carburizing process and device for wind power generation

Technical Field

The invention relates to the technical field of metal workpiece carburizing processing, in particular to a carburizing process and a carburizing device for an output gear for wind power generation.

Background

As is well known, in the field of wind power generation, an output gear needs to be engaged for transmission so as to provide power for a wind power generation device, which has a high requirement on the hardness of the output gear. The general process route of the output gear comprises a series of process flows of forging, normalizing, rough machining, carburizing, high-temperature tempering, carbon layer turning, stress-relief tempering, quenching, low-temperature tempering, finish machining and the like. For the output gear, the precision requirement is extremely high, and in the processing technology, the heat treatment process has the greatest difficulty in controlling the service performance and the deformation size of the product.

The main processes of the current heat treatment are as follows: the low-carbon alloy steel is subjected to surface carburization, high-temperature tempering and carbon layer turning, stress-relief tempering and quenching. The product is discharged from the furnace at the carburizing stage at the temperature lower than 500 ℃, the strong carburizing potential is 1.2 +/-0.05%, and the diffusion carburizing potential is 0.8 +/-0.05%. And quenching at 820-.

The process has the following defects: the temperature during quenching and heat preservation is too low, so that the core hardness of the product is difficult to improve, the service life of the product is reduced, and the residual austenite on the surface of the product is improved, the surface hardness of the product is reduced, and the deformation of the product is increased.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a carburizing process and carburizing equipment for an output gear for wind power generation, which have the effect of improving the carburizing effect of parts, thereby being beneficial to improving the hardness and the product quality of the output gear product.

The technical purpose of the invention is realized by the following technical scheme: a carburizing process for an output gear for wind power generation comprises the following process steps:

s1: cleaning and brushing a permeability-reducing agent: hoisting the part by using a hoisting ring or a sucking disc, putting the part into a cleaning tank, cleaning oil stains on the surface of the part, wiping water, and then coating the part which does not need to be carburized with an anti-seepage agent;

s2: charging into a furnace for carburizing: putting the part and the sample into a carburizing furnace simultaneously by a travelling crane, controlling the furnace pressure to be constant at 0.4-0.7Kpa, raising the temperature in the carburizing furnace, adding nitrogen, methanol and propane into the furnace in the process of raising the temperature, wherein the ratio of the nitrogen to the methanol is 1.1: 1, carburizing for 77 hours, wherein the carburizing temperature is 930 ℃, the highest carbon potential in the furnace is 1.08 percent C, and then, forcibly cooling the temperature in the furnace to 840 ℃ so that the part is cooled in the furnace for 2 hours;

s3: discharging to a slow cooling pit: taking out the part and the sample from the furnace, placing the part and the sample into a slow cooling pit, slowly cooling for 4.5-5.5h, wherein the temperature in the slow cooling pit is not higher than 100 ℃, and simultaneously filling nitrogen gas serving as protective gas into the slow cooling pit;

s4: high-temperature tempering: placing the part and the sample in a carburizing furnace, controlling the temperature at 650 +/-8 ℃ and the time at 6-6.5h, then cooling the temperature in the furnace to be not higher than 450 ℃, taking the part and the sample out of the furnace, carrying out performance detection on the sample, and carrying out the next process step on the sample and the part after the detection is qualified;

s5: quenching: placing the parts into a quenching furnace for oil cooling, controlling the oil temperature at 40-60 ℃, controlling the oil cooling time at 50-60min, taking out the samples for detection after quenching is finished, and performing the next process step on the samples and the parts after the samples are qualified;

s6: secondary tempering: and (3) taking the parts and the samples, putting the parts and the samples into a heating furnace, heating for 20-21h, controlling the temperature in the heating furnace at 180 ℃, taking the parts and the samples out, air cooling, finally performing final inspection on the samples, and judging that the output gear is qualified after the detection is qualified.

Through the technical scheme, during work, oil stains on the surface of the part are cleaned firstly, the part which does not need to be carburized is coated with the anti-seepage agent, then the part and the sample are charged into a furnace for carburization, after 77 hours of carburization processing, the part is subjected to forced cooling, then the part is placed into the slow cooling pit for slow cooling, and then the part is subjected to high-temperature tempering, so that the residual austenite amount in the carburized layer on the surface of the part is favorably reduced, more stable carbide and martensite structures are obtained in the subsequent quenching process, the residual austenite amount is reduced, and the surface hardness of the carburized layer is improved. After high-temperature tempering, quenching the part, finally performing secondary tempering on the part, and heating the part, so that the possibility that the part cracks due to increased internal stress after oil cooling is reduced, and the product quality is improved; meanwhile, the sample and the part are processed together, and the performance of the sample is detected after one process step is completed, so that on one hand, the processing quality of the part can be conveniently obtained by an operator through a detection result of the sample, on the other hand, the loss caused by the detection on the part is reduced, and the cost is saved.

The invention is further configured to: before coating the anti-seepage agent on the part, wrapping the part needing carburization by using a disposable plastic adhesive tape, and after coating the anti-seepage agent, removing the disposable plastic adhesive tape from the surface of the part.

Through the technical scheme, the part needing to be carburized is shielded by the disposable plastic adhesive tape, so that the possibility that the part needing to be carburized is difficult to be fully carburized due to the fact that an operator carelessly brushes the anti-seepage agent on the part needing to be carburized when brushing the anti-seepage agent is reduced, and the carburization effect is favorably improved.

The invention is further configured to: before the quenching processing of the part, the surface of the part is cleaned and detected, and the anti-seepage agent is brushed on the part where the anti-seepage agent falls off.

Through the technical scheme, the impermeable agent is brushed on the part where the impermeable agent on the surface of the part is separated, the possibility that the part where the impermeable agent is separated is carburized to generate a carburized layer is reduced, and the part which does not need to be carburized is protected, so that the quality of the product is improved.

The second technical purpose of the invention is realized by the following technical scheme: an equipment used in output gear carburizing process for wind power generation comprises a carburizing furnace body which is pre-buried and arranged underground and a furnace cover used for sealing the carburizing furnace body, wherein a driving mechanism used for driving the furnace cover to move is arranged above the furnace cover, the driving mechanism comprises a support frame which is arranged on the ground in a sliding manner and a scroll bar arranged between the support frame and the furnace cover, one end of the scroll bar is fixedly connected with the furnace cover, a first motor used for driving a turbine of the scroll bar to move and a first motor used for driving the turbine to rotate are arranged on the support frame, a guide rail is arranged on the ground along the width direction, a roller and a second motor used for driving the roller to rotate are arranged at the bottom end of the support frame in a rolling manner, the roller is matched with the guide rail, an air inlet pipe used for filling nitrogen, methanol and propane into the carburizing furnace body is arranged on the furnace cover, and an air outlet, the joint has the blast pipe on the gas vent, the outside of blast pipe is equipped with the ware of making firearm that is used for carrying out the heating to carbon monoxide, and during the emission carbon monoxide, the ware of making firearm is igniteed and is made carbon monoxide change carbon dioxide into, subaerial the outside of bell is equipped with and is used for carrying out the processing mechanism who collects carbon dioxide.

Through the technical scheme, when the furnace cover is required to be opened to take and place the parts, the first motor drives the turbine to rotate, the turbine drives the worm to drive the furnace cover to be away from the carburizing furnace body, then the second motor drives the roller to rotate, so that the roller drives the support frame to move along the length direction of the guide rail, and the support frame is moved away from the open end of the carburizing furnace body together with the furnace cover, so that the parts are put into the furnace or taken out through a travelling crane. In the course of working, this internal carbon monoxide that produces of carburizing furnace, carbon monoxide is through the blast pipe discharge after the flame heating that the lighter spouts is transformed into carbon dioxide after, carbon dioxide discharge after handle through processing agency, reduced the pollution to the air.

The invention is further configured to: processing mechanism includes first connecting pipe and the collection cover that links to each other with first connecting pipe, the one end of collecting the cover is kept away from towards first connecting pipe is linked together with the blast pipe, just the end of spouting of firearm stretches into in the first connecting pipe, be connected with the oxygen supply pipe on the first connecting pipe, it places subaerial to collect the cover, it offers the through-hole that is used for carminative to collect the one side that the cover kept away from first connecting pipe, set firmly the active carbon adsorption layer on the inner wall of collecting the cover.

Through the technical scheme, the activated carbon is prepared by pyrolyzing and activating carbon-containing raw materials such as wood, coal, petroleum coke and the like, has a developed pore structure, a large specific surface area and abundant surface chemical groups, and has good adsorption performance. When carbon dioxide is discharged into the collecting cover through the first connecting pipe, the activated carbon adsorption layer adsorbs part of the carbon dioxide, so that the emission of the carbon dioxide into the air is reduced, the possibility of aggravating the greenhouse effect due to too high emission of the carbon dioxide in the air is reduced, and the requirement of green environmental protection is met.

The invention is further configured to: the collecting cover is internally provided with a plurality of pieces of filter cloth for filtering carbon dioxide, and the plurality of pieces of filter cloth are arranged side by side at intervals in the collecting cover.

Through the technical scheme, the arrangement of the filter cloth is beneficial to filtering the carbon dioxide penetrating through the filter cloth, and the possibility of air pollution caused by the emission of dust mixed in the carbon dioxide to the air is reduced; on the other hand, the plurality of filter cloths play a role in blocking carbon dioxide, and the circulation speed of the carbon dioxide in the collecting cover is slowed down, so that the stay time of the carbon dioxide in the collecting cover is prolonged, and the improvement of the adsorption effect of the activated carbon adsorption layer on the carbon dioxide is facilitated.

The invention is further configured to: and a circulating water pipe is spirally wound on the outer side of the first connecting pipe, and the two ends of the circulating water pipe are respectively arranged as a water inlet end and a water outlet end.

Through above-mentioned technical scheme, circulating pipe's setting has played the effect of cooling to the carbon dioxide gas that leads to in the first connecting tube, is favorable to reducing the carbon dioxide high temperature and causes the possibility of destruction to the active carbon adsorption layer, is favorable to prolonging the life of active carbon adsorption layer.

The invention is further configured to: subaerial collect the cover and keep away from the one end of first connecting pipe and be equipped with the open jar that holds that has the clarified lime wash, collect the cover and hold and be linked together through the second connecting pipe between the jar, the second connecting pipe is located the below that holds jar interior liquid level with the intercommunication department that holds the jar, the one end joint that the cover was collected to the second connecting pipe orientation is in the through-hole, the inherent position joint that is close to the cover of collecting of second connecting pipe has the sponge piece, and subaerial the bracing piece that is used for jacking the second connecting pipe that sets firmly.

Through above-mentioned technical scheme, carbon dioxide gas through collecting the cover exhaust leads to in the clear lime water and takes place chemical reaction and generate calcium carbonate and deposit, sets up like this, has reduced the possibility that carbon dioxide discharged causes greenhouse effect in the air.

The invention is further configured to: open end on the carburizing furnace body has set firmly the installation ring piece along the periphery, the annular has been seted up towards one side of bell to the installation ring piece, one side rigid coupling of bell towards the carburizing furnace body has the joint piece with annular matched with, the joint piece corresponds the joint in the annular, the annular internal fixation has the rubber layer, the joint piece is inconsistent with the rubber layer.

Through above-mentioned technical scheme, when the bell closes on the opening end of carburizing furnace body, the joint piece corresponds the joint and is inconsistent in the annular and with the rubber layer, has strengthened the sealed effect of bell to the carburizing furnace body, and simultaneously, the rubber layer is located the annular, has reduced the possibility that the rubber layer drops from the opening end of carburizing furnace body under the influence of stove internal high temperature, is favorable to prolonging the life on rubber layer.

In conclusion, the invention has the following beneficial effects:

1. the parts are successively tempered twice in the carburizing process, so that the possibility of cracking of the parts due to stress increase after the parts are cooled is reduced, and the hardness of the parts is enhanced;

2. carbon dioxide generated after carbon monoxide generated in the carburization process is heated is absorbed, and the carbon dioxide is consumed through the reaction of the clarified lime water and the carbon dioxide, so that the possibility of greenhouse effect caused by the emission of the carbon dioxide to the air is reduced.

Drawings

FIG. 1 is a schematic structural diagram for showing the connection relationship between the furnace cover and the carburizing furnace body in the embodiment.

Fig. 2 is an enlarged view of a portion a in fig. 1.

Fig. 3 is a schematic structural diagram for embodying the driving mechanism in the embodiment.

Fig. 4 is a schematic structural diagram for embodying the processing mechanism in the embodiment.

Fig. 5 is an enlarged view of a portion B in fig. 4.

Fig. 6 is a schematic structural diagram for embodying the collecting hood and the activated carbon adsorption layer and the filter cloth disposed in the collecting hood in the embodiment.

Reference numerals: 1. a carburizing furnace body; 11. installing a ring block; 111. a ring groove; 1111. a rubber layer; 2. a furnace cover; 21. an air inlet pipe; 22. an exhaust port; 23. an exhaust pipe; 24. a lighter; 25. a clamping block; 3. a drive mechanism; 31. a support frame; 311. a roller; 32. a scroll bar; 33. a turbine; 34. a first motor; 35. a guide rail; 36. a second motor; 4. a processing mechanism; 41. a first connecting pipe; 411. an oxygen supply tube; 412. a circulating water pipe; 42. a collection hood; 421. a through hole; 422. an activated carbon adsorption layer; 423. a filter cloth; 43. a second connecting pipe; 431. a sponge block; 432. a support bar; 44. a containment tank.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example 1: the invention discloses a carburizing process for an output gear for wind power generation, which comprises the following process steps:

s1: cleaning and brushing a permeability-reducing agent: hoisting a part by using a hoisting ring or a sucking disc, putting the part into a cleaning tank, cleaning oil stains on the surface of the part, brushing the part which does not need to be carburized with an anti-seepage agent after wiping water, wrapping the part which needs to be carburized on the part by using a disposable plastic adhesive tape before brushing the part with the anti-seepage agent, brushing the anti-seepage agent by using a heat shield FC-108 anti-carburizing coating after finishing brushing, drying for 1.5h at 100 ℃, and then taking off the disposable plastic adhesive tape from the surface of the part, so that the part which needs to be carburized is brushed when the anti-seepage agent is brushed can be reduced;

s2: charging into a furnace for carburizing: putting the part and the sample into a carburizing furnace simultaneously by a travelling crane, controlling the furnace pressure to be constant at 0.4-0.7Kpa, raising the temperature in the carburizing furnace, adding nitrogen (protective gas), methanol (carrier) and propane (active carbon atoms are provided by pyrolysis) into the furnace in the process of raising the temperature, wherein the ratio of the nitrogen to the methanol is 1.1: 1, carburizing at 930 ℃ for 77h, and sequentially dividing the carburizing time into 20h of strong carburizing (carbon potential of 1.08 percent C), 15h of diffusion (carbon potential of 0.75 percent C), 18h of strong carburizing (carbon potential of 1.08 percent C), 10h of diffusion (carbon potential of 0.85 percent C), 14h of diffusion (carbon potential of 0.75 percent C) and the highest carbon potential in the furnace of 1.08 percent C, and then forcibly cooling the temperature in the furnace to 840 ℃ so that the part is cooled in the furnace for 2 h;

the above-mentioned equipment that is arranged in output gear carburization technology for wind power generation, refer to fig. 1 and fig. 2, including carburizing furnace body 1 and bell 2, carburizing furnace body 1 is pre-buried underground, open end on carburizing furnace body 1 has installation ring piece 11 along the welding of periphery, annular 111 has been seted up towards one side of bell 2 to installation ring piece 11, it has one deck rubber layer 1111 to bond on the cell wall of annular 111, bell 2 has joint piece 25 towards one side welding of carburizing furnace body 1, when bell 2 will seal up at the open end of carburizing furnace body 1, joint piece 25 corresponds the joint in annular 111 and inconsistent with rubber layer 1111.

Referring to fig. 3, a driving mechanism 3 for driving the furnace cover 2 to move is arranged above the furnace cover 2, the driving mechanism 3 includes a support frame 31, the support frame 31 and the furnace cover 2 are connected through a scroll bar 32, one end of the scroll bar 32 is welded on one side of the furnace cover 2 departing from the carburizing furnace body 1, a turbine 33 matched with the scroll bar 32 is fixedly arranged on the support frame 31, in this embodiment, four scroll bars 32 are arranged on the furnace cover 2, the turbine 33 bars of the turbine 33 on every two scroll bars 32 are coaxial, a first motor 34 for driving the turbine 33 bars to rotate is arranged on the support frame 31, the first motor 34 drives the turbine 33 bars to rotate, and thus the scroll bar 32 drives the furnace cover 2 to go up and down.

Referring to fig. 3, a guide rail 35 is arranged on the ground along the width direction, a roller 311 is rotatably arranged at one end of the support frame 31 facing the guide rail 35, the roller 311 is in sliding fit with the guide rail 35, a second motor 36 is fixedly arranged on the side wall of the support frame 31, and a rotating shaft of the second motor 36 is coaxially connected with the roller 311. When a part is required to be placed in the carburizing furnace body 1 or the part is taken out of the carburizing furnace body 1, the scroll bar 32 is driven by the turbine 33 to drive the furnace cover 2 to ascend, and then the second motor 36 drives the roller 311 to move along the length direction of the guide rail 35, so that the support frame 31 drives the furnace cover 2 to move away from the position right above the carburizing furnace body 1.

Referring to fig. 4 and 5, the furnace cover 2 is communicated with an air inlet pipe 21 for filling nitrogen, methanol and propane into the carburizing furnace body 1, the air inlet pipe 21 is provided with a control valve, the furnace cover 2 is provided with an air outlet 22, the air outlet 22 is connected with an air outlet pipe 23 in a clamping manner, carbon monoxide generated in the carburizing process can be discharged through the air outlet pipe 23, the outer side of the air outlet pipe 23 is provided with an igniter 24 for heating the carbon monoxide, and the outer side of the furnace cover 2 is provided with a processing mechanism 4 for collecting carbon dioxide on the ground. The processing mechanism 4 comprises a first connecting pipe 41 and a collecting cover 42, wherein the first connecting pipe 41 and the air outlet pipe are made of alloy steel, the collecting cover 42 is placed on the ground, two ends of the first connecting pipe 41 are respectively communicated with the collecting cover 42 and the air outlet pipe 23, the flame spraying end of the igniter 24 extends into the first connecting pipe 41, and the first connecting pipe 41 is communicated with an oxygen supply pipe 411. When carbon monoxide is discharged through the exhaust pipe 23, the igniter 24 is ignited to convert carbon monoxide into carbon dioxide, and the oxygen supply pipe 411 is charged with oxygen toward the first connection pipe 41, thereby reducing the possibility of extinguishing the fire.

Referring to fig. 4 and 5, a circulating water pipe 412 is spirally wound outside the first connecting pipe 41, and both ends of the circulating water pipe 412 are respectively provided as a water inlet end and a water outlet end, and in actual operation, the water inlet end is connected to a tap water pipe, and the water outlet end is connected to a boiler. During operation, tap water is introduced into the circulating water pipe 412, the effect of cooling the carbon dioxide gas in the first connecting pipe 41 is achieved, and heated water flows into the boiler through the water outlet end, so that the waste heat of the water is recycled.

Referring to fig. 4 and 6, a single activated carbon adsorption layer 422 is adhered to the inner wall of the collection cover 42, and a plurality of filter cloths 423 are provided in the collection cover 42, in this embodiment, three filter cloths 423 are provided, three filter cloths 423 are spaced apart and arranged in parallel in the collection cover 42, and the outer circumference of the filter cloths 423 is adhered to the inner circumference of the collection cover 42. The inside many fine and close pore structure of active carbon has good adsorption efficiency, and carbon dioxide passes through first connecting pipe 41 and enters into collection cover 42, filters through three filter cloths 423 in proper order for the dust impurity that mix with in the carbon dioxide etc. are filtered off, has also played the effect of stopping to carbon dioxide simultaneously, has slowed down the velocity of flow of carbon dioxide in collection cover 42, has prolonged the time that carbon dioxide is detained in collection cover 42, thereby the active carbon adsorbed layer 422 of being convenient for absorbs carbon dioxide.

Referring to fig. 4, a through hole 421 is opened at one side of the collecting cover 42 far away from the first connecting pipe 41, a second connecting pipe 43 is clamped in the through hole 421, an open containing tank 44 containing clarified lime water is placed on the ground, the containing tank 44 is located at a position of the collecting cover 42 far away from the first connecting pipe 41, one end of the second connecting pipe 43 far away from the collecting cover 42 is communicated with the containing cover, the communicating position of the second connecting pipe 43 and the containing tank 44 is located below the liquid level in the containing tank 44, a support rod 432 is welded below the second connecting pipe 43 on the ground, the second connecting pipe 43 is supported and placed at the top end of the support rod 432, and the second connecting pipe 43 forms a height drop to reduce the possibility that the clarified lime water in the containing tank 44 flows back into the second connecting pipe 43.

Referring to fig. 4 and 6, a part of the carbon dioxide which is not adsorbed by the activated carbon adsorption layer 422 enters the second connection pipe 43 from the inside of the collection cover 42 and enters the holding tank 44 to chemically react with the clarified lime water to generate calcium carbonate and water, so that the possibility of direct discharge of the carbon dioxide into the air, which is a greenhouse gas, is reduced, and the possibility of occurrence of a greenhouse effect is reduced. The sponge block 431 is clamped at a position close to the collecting cover 42 in the second connecting pipe 43, the sponge block 431 plays a role in blocking and adsorbing water, the possibility of activated carbon inactivation caused by the fact that water vapor enters the collecting cover 42 is reduced, and the service life of the activated carbon is prolonged.

S3: discharging to a slow cooling pit: taking out the part and the sample from the furnace, putting the part and the sample into a slow cooling pit, slowly cooling for 4.5 hours, wherein the temperature in the slow cooling pit is 100 ℃, and simultaneously filling nitrogen as protective gas into the slow cooling pit; s4: high-temperature tempering: placing the part and the sample in a carburizing furnace, controlling the temperature at 658 ℃ and the time at 6h, then cooling the temperature in the furnace to 450 ℃, taking the part and the sample out of the furnace, carrying out performance detection on the sample, and carrying out the next process step on the sample and the part after the detection is qualified; before the next process step is carried out, an operator cleans and detects the surface of the part, and the anti-seepage agent is brushed on the part where the anti-seepage agent falls off, so that the possibility that a carburized layer is generated on the part where the anti-seepage agent falls off and the anti-seepage agent falls off on the surface of the part is reduced, the precision of carburizing the surface of the part is improved, and the product precision of the output gear is improved.

S5: quenching: placing the parts into a quenching furnace for oil cooling, controlling the oil temperature at 40 ℃, controlling the oil cooling time at 60min, taking out the samples for detection after quenching is finished, and performing the next process step on the samples and the parts after the samples are qualified;

s6: secondary tempering: and (3) taking the parts and the samples, putting the parts and the samples into a heating furnace, heating for 20 hours, controlling the temperature in the heating furnace to be 180 ℃, taking the parts and the samples out, carrying out air cooling, finally carrying out final inspection on the samples, and representing that the output gear is qualified after the detection is qualified.

The implementation principle of the embodiment is as follows: during processing, the parts are sequentially subjected to six process steps of cleaning and coating an anti-seepage agent, charging into a furnace for carburizing, discharging from the furnace for turning into a slow cooling pit, high-temperature tempering, quenching processing and secondary tempering, so that the parts are successively tempered twice in the process of cooling, the stress of the parts and a carburized layer in the process of cooling is weakened, the hardness of the carburized layer and the parts is improved, the possibility of part cracking is reduced, and the product quality of the output gear is improved.

Example 2: compared with the embodiment 1, the carburizing process for the output gear for wind power generation disclosed by the invention comprises the following process steps of:

s1: cleaning and brushing a permeability-reducing agent: hoisting the part by using a hoisting ring or a sucking disc, putting the part into a cleaning tank, cleaning oil stains on the surface of the part, brushing the part which does not need to be carburized with an anti-seepage agent after wiping water, wrapping the part which needs to be carburized on the part by using a disposable plastic adhesive tape before brushing the part with the anti-seepage agent, brushing the anti-seepage agent by using a heat shield FC-108 anti-carburizing coating after finishing brushing, drying the part for 1.25h at 175 ℃, and then removing the disposable plastic adhesive tape from the surface of the part, so that the part which needs to be carburized is brushed when the anti-seepage agent is brushed is favorably reduced;

s2: charging into a furnace for carburizing: putting the part and the sample into a carburizing furnace simultaneously by a travelling crane, controlling the furnace pressure to be constant at 0.4-0.7Kpa, raising the temperature in the carburizing furnace, adding nitrogen, methanol and propane into the furnace in the process of raising the temperature, wherein the ratio of the nitrogen to the methanol is 1.1: 1, carburizing at 930 ℃ for 77h, and sequentially dividing the carburizing time into 20h of strong carburizing (carbon potential of 1.08 percent C), 15h of diffusion (carbon potential of 0.75 percent C), 18h of strong carburizing (carbon potential of 1.08 percent C), 10h of diffusion (carbon potential of 0.85 percent C), 14h of diffusion (carbon potential of 0.75 percent C) and the highest carbon potential in the furnace of 1.08 percent C, and then forcibly cooling the temperature in the furnace to 840 ℃ so that the part is cooled in the furnace for 2 h;

s3: discharging to a slow cooling pit: taking out the part and the sample from the furnace, placing the part and the sample into a slow cooling pit, slowly cooling for 5 hours, wherein the temperature in the slow cooling pit is 100 ℃, and simultaneously filling nitrogen as protective gas into the slow cooling pit;

s4: high-temperature tempering: placing the part and the sample in a carburizing furnace, controlling the temperature at 650 ℃ and the time at 6.25h, then cooling the temperature in the furnace to 450 ℃, taking the part and the sample out of the furnace, carrying out performance detection on the sample, and carrying out the next process step on the sample and the part after the detection is qualified;

before the next process step is carried out, an operator cleans and detects the surface of the part, and the anti-seepage agent is brushed on the part where the anti-seepage agent falls off, so that the possibility that a carburized layer is generated on the part where the anti-seepage agent falls off and the anti-seepage agent falls off on the surface of the part is reduced, the precision of carburizing the surface of the part is improved, and the product precision of the output gear is improved.

S5: quenching: placing the parts into a quenching furnace for oil cooling, controlling the oil temperature at 50 ℃ and the oil cooling time at 55min, taking out the samples for detection after quenching is finished, and performing the next process step on the samples and the parts after the samples are qualified;

s6: secondary tempering: and (3) taking the parts and the samples, putting the parts and the samples into a heating furnace, heating for 20.5 hours, controlling the temperature in the heating furnace at 180 ℃, taking the parts and the samples out, air cooling, finally performing final inspection on the samples, and judging that the output gear is qualified after the detection is qualified.

Example 3: the invention discloses a carburizing process for an output gear for wind power generation, which comprises the following process steps:

s1: cleaning and brushing a permeability-reducing agent: hoisting the part by using a hoisting ring or a sucking disc, putting the part into a cleaning tank, cleaning oil stains on the surface of the part, brushing the part which does not need to be carburized with an anti-seepage agent after wiping water, wrapping the part which needs to be carburized on the part by using a disposable plastic adhesive tape before brushing the part with the anti-seepage agent, brushing the anti-seepage agent by using a heat shield FC-108 anti-carburizing coating after finishing brushing, drying for 1h at 250 ℃, and then taking off the disposable plastic adhesive tape from the surface of the part, so that the part which needs to be carburized is brushed when the anti-seepage agent is brushed can be reduced;

s3: discharging to a slow cooling pit: taking out the part and the sample from the furnace, putting the part and the sample into a slow cooling pit, slowly cooling for 5.5 hours, wherein the temperature in the slow cooling pit is 100 ℃, and simultaneously filling nitrogen as protective gas into the slow cooling pit;

s4: high-temperature tempering: placing the part and the sample in a carburizing furnace, controlling the temperature at 642 ℃ and the time at 6.5h, then cooling the temperature in the furnace to 450 ℃, taking the part and the sample out of the furnace, carrying out performance detection on the sample, and carrying out the next process step on the sample and the part after the detection is qualified;

S5: quenching: placing the parts into a quenching furnace for oil cooling, controlling the oil temperature at 60 ℃ and the oil cooling time at 5min, taking out the samples for detection after quenching is finished, and performing the next process step on the samples and the parts after the samples are qualified;

s6: secondary tempering: and (3) taking the parts and the samples, putting the parts and the samples into a heating furnace, heating for 21h, controlling the temperature in the heating furnace to be 180 ℃, taking the parts and the samples out, air cooling, finally performing final inspection on the samples, and judging that the output gear is qualified after the detection is qualified.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Claims

1. A carburizing process for an output gear for wind power generation is characterized by comprising the following process steps:

2. The process for carburizing the output gear for wind power generation according to claim 1, characterized in that: before coating the anti-seepage agent on the part, wrapping the part needing carburization by using a disposable plastic adhesive tape, and after coating the anti-seepage agent, removing the disposable plastic adhesive tape from the surface of the part.

3. The process for carburizing the output gear for wind power generation according to claim 1, characterized in that: before the quenching processing of the part, the surface of the part is cleaned and detected, and the anti-seepage agent is brushed on the part where the anti-seepage agent falls off.

4. The apparatus of any one of claims 1 to 3 for use in a carburizing process of an output gear for wind power generation, characterized in that: including pre-buried setting in underground carburizing furnace body (1) and be used for sealing up bell (2) of carburizing furnace body (1), bell (2) top is equipped with actuating mechanism (3) that is used for driving bell (2) to remove, actuating mechanism (3) are including sliding setting subaerial support frame (31) and setting up scroll bar (32) between support frame (31) and bell (2), the one end and bell (2) fixed connection of scroll bar (32), be equipped with on support frame (31) and be used for driving turbine (33) that scroll bar (32) removed and drive turbine (33) rotatory first motor (34), subaerial edge width direction is equipped with guide rail (35), the bottom roll of support frame (31) is provided with gyro wheel (311) and drive gyro wheel (311) rotatory second motor (36), gyro wheel (311) and guide rail (35) looks adaptation, be equipped with intake pipe (21) that are used for filling into nitrogen gas, methyl alcohol and propane in orientation carburizing furnace body (1) on bell (2), offer on bell (2) and be used for supplying carbon monoxide exhaust gas vent (22), the joint has blast pipe (23) on gas vent (22), the outside of blast pipe (23) is equipped with lighter (24) that are used for carrying out the heating to carbon monoxide, and during the emission carbon monoxide, lighter (24) are igniteed and are made carbon monoxide change into carbon dioxide, subaerial the outside of bell (2) is equipped with and is used for carrying out processing mechanism (4) collected to carbon dioxide.

5. The apparatus according to claim 4 for use in a carburizing process of an output gear for wind power generation, characterized in that: processing apparatus (4) include first connecting pipe (41) and cover (42) with collection that first connecting pipe (41) link to each other, first connecting pipe (41) are linked together with blast pipe (23) towards keeping away from the one end of collecting cover (42), just the flame projecting end of lighter (24) stretches into in first connecting pipe (41), be connected with oxygen supply pipe (411) on first connecting pipe (41), it places subaerial to collect cover (42), it offers one side of keeping away from first connecting pipe (41) and is used for carminative through-hole (421) to collect cover (42), activated carbon adsorption layer (422) have set firmly on the inner wall of collecting cover (42).

6. The apparatus for use in the carburizing process of the output gear for wind power generation according to claim 5, characterized in that: the carbon dioxide collecting device is characterized in that a plurality of pieces of filter cloth (423) used for filtering carbon dioxide are arranged in the collecting cover (42), and the filter cloth (423) are arranged in the collecting cover (42) side by side at intervals.

7. The apparatus for use in the carburizing process of the output gear for wind power generation according to claim 5, characterized in that: and a circulating water pipe (412) is spirally wound on the outer side of the first connecting pipe (41), and the two ends of the circulating water pipe (412) are respectively arranged as a water inlet end and a water outlet end.

8. The apparatus for use in the carburizing process of the output gear for wind power generation according to claim 6, characterized in that: the one end that collects cover (42) and keep away from first connecting pipe (41) on the ground is equipped with the open holding tank (44) that the splendid attire lime wash was equipped with, collect cover (42) and holding between the tank (44) and be linked together through second connecting pipe (43), the intercommunication department of second connecting pipe (43) and holding tank (44) is located the below of holding tank (44) interior liquid level, second connecting pipe (43) towards the one end joint of collecting cover (42) in through-hole (421), the position joint that is close to collecting cover (42) in second connecting pipe (43) has sponge piece (431), and sets firmly on the ground and is used for the bracing piece (432) that the jacking of second connecting pipe (43) got up.

9. The apparatus according to claim 4 for use in a carburizing process of an output gear for wind power generation, characterized in that: open end on carburizing furnace body (1) has set firmly installation ring piece (11) along the periphery, annular (111) have been seted up towards one side of bell (2) to installation ring piece (11), bell (2) have with annular (111) matched with joint piece (25) towards one side rigid coupling of carburizing furnace body (1), joint piece (25) correspond the joint in annular (111), annular (111) internal setting has rubber layer (1111), joint piece (25) and rubber layer (1111) are inconsistent.