CN110541139B - Carburizing and quenching method and carburizing and quenching equipment for internal spline of half axle gear - Google Patents
Carburizing and quenching method and carburizing and quenching equipment for internal spline of half axle gear Download PDFInfo
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- CN110541139B CN110541139B CN201910992648.4A CN201910992648A CN110541139B CN 110541139 B CN110541139 B CN 110541139B CN 201910992648 A CN201910992648 A CN 201910992648A CN 110541139 B CN110541139 B CN 110541139B
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
- C21D1/613—Gases; Liquefied or solidified normally gaseous material
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/62—Quenching devices
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/32—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for gear wheels, worm wheels, or the like
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
- C23C8/20—Carburising
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/80—After-treatment
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Abstract
The invention discloses a carburizing and quenching method and a carburizing and quenching device for an internal spline of a half axle gear, wherein the method comprises the steps of sleeving a compensation sleeve on the half axle gear, putting the half axle gear into a quenching furnace with low internal pressure, heating the internal spline to 900 ℃, and introducing propane into the position of the internal spline for 240 min; then, reducing the temperature of the inner spline to 840 ℃, and continuously introducing propane for 45 min; stopping heating and introducing propane, introducing high-pressure high-purity nitrogen instead, continuing for 20min, and finally taking out the half-shaft gear from the quenching furnace and cooling to room temperature; the equipment comprises a quenching furnace, wherein a hollow placing column is arranged in the quenching furnace, and the bottom of the quenching furnace is connected with an exhaust pipe; a first branch pipe and a second branch pipe are connected in the tangential direction of the side surface of the placing column through an air inlet pipe; the top end of the quenching furnace is connected with a telescopic cylinder, and the bottom end of the telescopic cylinder is fixed with a resistance heating coil through a motor. The invention not only can improve the carburizing effect at the position of the internal spline, but also has the advantage of small deformation of the internal spline.
Description
Technical Field
The invention relates to a carburizing and quenching method and quenching equipment for an internal spline of a gear, in particular to a carburizing and quenching method and quenching equipment for an internal spline of a half axle gear.
Background
At present, the gear quenching commonly seen in the market is to put the gear into a quenching furnace with high internal temperature, and introduce methane, propane and other gases into the quenching furnace to carburize the surface of the gear, and then directly immerse the carburized gear into quenching oil to cool and quench, so that the surface of the gear has better wear resistance and hardness, and the inside of the gear still keeps toughness; but the half axle gear with the internal spline is quenched by adopting the device, and methane and other gases are directly filled into the quenching furnace, so that the gases are not easy to reach the position of the internal spline, and the carburizing effect at the position of the internal spline is poor; the temperature of one end part of the heating position in the quenching furnace is high, the internal temperature distribution is uneven, so that the integral heating effect of the internal spline is uneven, and the internal spline can deform greatly after quenching; meanwhile, the thicknesses of the two end parts of the side gear are not uniform, the deformation degrees of the two end parts of the internal spline are different during quenching, and the internal spline is easy to be greatly distorted. Therefore, the existing half shaft gear carburizing and quenching method and equipment have the problems of poor carburizing effect at the position of the internal spline and large deformation of the internal spline.
Disclosure of Invention
The invention aims to provide a carburizing and quenching method and carburizing and quenching equipment for an internal spline of a half shaft gear. The invention not only can improve the carburizing effect at the position of the internal spline, but also has the advantage of small deformation of the internal spline.
The technical scheme of the invention is as follows: a carburizing and quenching method for an internal spline of a half axle gear comprises the following steps:
a. sleeving a compensation sleeve on a half shaft part on the half shaft gear to obtain a product A; at the moment, the thicknesses of the two ends of the half axle gear are the same;
b. vertically placing the product A into the top end of a hollow placing column in a quenching furnace, and exhausting the quenching furnace until the pressure in the quenching furnace is 150-2000 pa;
c. arranging a resistance-type heating coil at the position of an internal spline in the middle of the half axle gear, and then electrifying the resistance-type heating coil to heat the internal spline on the half axle gear to 880-950 ℃;
d. then the flow rate is led in from bottom to top through a hollow placing column and is 0.08-0.15 m3Propane per hour for 220-280 min to obtain product D;
e. then, the temperature of the internal spline of the half axle gear in the product D is reduced to 820-840 ℃, and the flow is continuously introduced into the product D at the flow rate of 0.08-0.15 m3Propane for 40-50 min to obtain product E;
f. removing the resistance heating coil, stopping introducing propane, introducing nitrogen with the pressure of 1-1.5 Mpa to the position of the spline in the half axle gear in the E product from bottom to top through a hollow placing column, and continuing for 15-20 min to obtain a product F;
g. and taking the F product out of the quenching furnace, cooling to room temperature, and then taking down the compensation sleeve on the half axle gear to obtain a finished product.
In the carburizing and quenching method for the internal spline of the side gear, the propane is spirally input from bottom to top along the placing column.
In the carburizing and quenching method for the internal spline of the side gear, the nitrogen is spirally input from bottom to top along the placing column.
The carburizing and quenching equipment for the carburizing and quenching method of the internal spline of the half shaft gear comprises a quenching furnace, wherein a pressure gauge and a temperature gauge are arranged on the quenching furnace; a hollow placing column is arranged in the quenching furnace, and the bottom of the quenching furnace is connected with an exhaust pipe; an air inlet pipe is connected in the tangential direction of the side surface of the placing column, and a first branch pipe and a second branch pipe are connected to the air inlet pipe; a horizontal annular placing rack is arranged at the top of the placing column, and a furnace door is arranged on the side surface of the quenching furnace corresponding to the placing rack; the top end of the quenching furnace is connected with a vertically arranged telescopic cylinder, the bottom end of the telescopic cylinder is fixedly provided with a motor, and the bottom end of the motor is fixedly provided with a resistance-type heating coil.
In the carburizing and quenching equipment, the exhaust pipe is connected with an exhaust pump, and is provided with a check valve.
In the carburizing and quenching equipment, the first branch pipe and the second branch pipe are both connected with switch valves.
In the carburizing and quenching equipment, the furnace door is provided with a sealing strip.
Compared with the prior art, the carburization quenching method for the internal spline of the half shaft gear is improved, the half shaft part on the half shaft gear is sleeved with the compensation sleeve, so that the thicknesses of two ends of the twelve-point half shaft gear are the same, the deformation degrees of the two ends of the half shaft gear are consistent as much as possible during later quenching, and the two ends of the internal spline are prevented from being twisted; pumping the quenching furnace to a low-pressure vacuum state for carburizing, wherein propane serving as carburizing gas uniformly passes through the position of the internal spline from bottom to top along the placing column, and the internal spline is uniformly heated by a resistance-type heating coil (the height is more than or equal to the length of the internal spline), so that the carburizing uniformity is higher; carburizing, wherein the carburizing effect at the position of the internal spline is good through a strong carburizing and diffusion period at 880-950 ℃ and a heat preservation period at 820-840 ℃; and finally, introducing high-pressure high-purity nitrogen from bottom to top along the placing column, so that the nitrogen continuously and quickly quenches the inner spline through the position of the inner spline, and the inner spline is more uniformly deformed after quenching and cooling. In addition, the propane and the nitrogen in the invention are input from bottom to top in a building-type selective manner, and further the propane and the nitrogen can uniformly pass through the positions of the internal spline, so that the carburizing and quenching of the internal spline are uniform, and the deformation is small; the invention improves the prior carburizing and quenching equipment, a hollow placing column is arranged in a quenching furnace, an annular placing rack is arranged at the top end of the placing column (a half-shaft gear can be stably placed in the placing rack after being sleeved with a compensation sleeve, a half-shaft gear is placed in the placing rack through a furnace door on the quenching furnace, then the furnace door is closed, then the quenching furnace is pumped by a pumping pipe, so that the interior of the quenching furnace is in a low-pressure state, a telescopic cylinder at the top end of the quenching furnace extends downwards so that a resistance-type heating coil at the bottom end of a motor is positioned in an inner spline of the half-shaft gear, the resistance-type heating coil heats the inner spline by heat radiation after being electrified and heated, and simultaneously the motor is started to drive the resistance-type heating coil to rotate, thereby preventing the problem that the inner spline is heated unevenly, the first branch pipe leads propane and other carburizing gases to the tangential direction of the placing column through the air inlet pipe, so that the carburizing gases rise spirally, and the carburizing gases rise uniformly to the position of the internal spline after rising to the height of one end (the air exhaust pipe continuously exhausts air to keep the low-pressure state in the quenching furnace), thereby ensuring the quantity and the uniformity of the carburizing gases at the position of the internal spline and improving the carburizing effect of the internal spline; after carburization is finished, the first branch pipe is closed, the resistance heating coil is powered off, the telescopic rod is contracted, then quenching gas such as high-pressure high-purity nitrogen is introduced into the second branch pipe along the tangential direction of the quenching furnace through the air inlet pipe, the quenching gas uniformly cools and quenches the inner spline of the semi-axis gear (the air extraction of the air extraction pipe is stopped, so that the pressure in the quenching furnace is gradually increased), and the quenching deformation degree of the inner spline is reduced; and the deformation degree of the internal spline of the gear is further reduced by adopting low-pressure carburization and high-pressure gas quenching, and the yield of the half axle gear is ensured. In addition, the air exhaust pipe on the carburizing and quenching equipment is connected with an air exhaust pump, which is helpful for exhausting the quenching furnace to form a low-pressure state, and the air exhaust pipe is provided with a check valve which can prevent gas from re-entering the quenching furnace from the air exhaust pipe; the first branch pipe and the second branch pipe are both connected with switch valves, and the carburization and quenching of the internal spline of the gear are adjusted by controlling the opening and closing of the two switch valves; the sealing strip is arranged on the furnace door to ensure the sealing of the position of the furnace door, thereby ensuring the low-pressure carburization state in the quenching furnace. Therefore, the invention not only can improve the carburizing effect at the position of the internal spline, but also has the advantage of smaller deformation of the internal spline.
Drawings
Fig. 1 is a schematic structural view of the present invention.
The labels in the figures are: 1-a quenching furnace, 2-a placing column, 3-an air exhaust pipe, 4-an air inlet pipe, 5-a first branch pipe, 6-a placing frame, 7-a furnace door, 8-a telescopic cylinder, 9-a motor, 10-a resistance heating coil, 11-an air exhaust pump, 12-a check valve, 13-a switch valve, 14-a sealing strip, 15-a second branch pipe, 16-a pressure gauge and 17-a thermometer.
Detailed Description
The invention is further illustrated by the following figures and examples, which are not to be construed as limiting the invention.
Example 1. A carburizing and quenching method for an internal spline of a half axle gear comprises the following steps:
a. sleeving a compensation sleeve on a half shaft part on the half shaft gear to obtain a product A; at the moment, the thicknesses of the two ends of the half axle gear are the same;
b. vertically placing the product A into the top end of a hollow placing column in a quenching furnace, and exhausting the quenching furnace until the pressure in the quenching furnace is 150-2000 pa;
c. arranging a resistance-type heating coil at the position of an internal spline in the middle of the half axle gear, and then electrifying the resistance-type heating coil to heat the internal spline on the half axle gear to 880-950 ℃;
d. then the flow rate is led in from bottom to top through a hollow placing column and is 0.08-0.15 m3Propane per hour for 220-280 min to obtain product D;
e. then, the temperature of the internal spline of the half axle gear in the product D is reduced to 820-840 ℃, and the flow is continuously introduced into the product D at the flow rate of 0.08-0.15 m3Propane for 40-50 min to obtain product E;
f. removing the resistance heating coil, stopping introducing propane, introducing nitrogen with the pressure of 1-1.5 Mpa to the position of the spline in the half axle gear in the E product from bottom to top through a hollow placing column, and continuing for 15-20 min to obtain a product F;
g. and taking the F product out of the quenching furnace, cooling to room temperature, and then taking down the compensation sleeve on the half axle gear to obtain a finished product.
The propane is spirally input from bottom to top along the placing column; the nitrogen is spirally input from bottom to top along the placing column.
A carburizing and quenching device for an internal spline of a shaft gear is shown in figure 1 and comprises a quenching furnace 1, wherein a pressure gauge 16 and a thermometer 17 are arranged on the quenching furnace 1; a hollow placing column 2 is arranged in the quenching furnace 1, and the bottom of the quenching furnace 1 is connected with an exhaust pipe 3; an air inlet pipe 4 is connected in the tangential direction of the side surface of the placing column 2, and a first branch pipe 5 and a second branch pipe 15 are connected on the air inlet pipe 4; a horizontal annular placing rack 6 is arranged at the top of the placing column 2, and a furnace door 7 is arranged on the side surface of the quenching furnace 1 corresponding to the placing rack 6; the top end of the quenching furnace 1 is connected with a vertically arranged telescopic cylinder 8, the bottom end of the telescopic cylinder 8 is fixed with a motor 9, and the bottom end of the motor 9 is fixed with a resistance type heating coil 10.
The air exhaust pipe 3 is connected with an air exhaust pump 11, and the air exhaust pipe 3 is provided with a check valve 12; the first branch pipe 5 and the second branch pipe 15 are both connected with a switch valve 13; the oven door 7 is provided with a sealing strip 14.
Example 2. A carburizing and quenching method for an internal spline of a half axle gear comprises the following steps:
a. sleeving a compensation sleeve on a half shaft part on the half shaft gear to obtain a product A; at the moment, the thicknesses of the two ends of the half axle gear are the same;
b. vertically placing the product A into the top end of a hollow placing column in a quenching furnace, and exhausting the quenching furnace until the pressure in the quenching furnace is 1000 pa;
c. arranging a resistance-type heating coil at the position of an internal spline in the middle of the half-axle gear, and then electrifying the resistance-type heating coil to heat the internal spline on the half-axle gear to 900 ℃;
d. then the flow rate is 0.1m from bottom to top through a hollow placing column3Propane per hour for 240min to obtain product D;
e. then the temperature of the internal spline of the half axle gear in the D product is reduced to 840 ℃, and the flow is continuously introduced to the D product at 0.1m3Propane for 45min per hour to obtain product E;
f. removing the resistance heating coil, stopping introducing propane, introducing nitrogen gas with pressure of 1.2Mpa into the spline position in the half shaft gear of the E product from bottom to top through the hollow placing column, and continuing for 20min to obtain an F product;
g. and taking the F product out of the quenching furnace, cooling to room temperature, and then taking down the compensation sleeve on the half axle gear to obtain a finished product.
The propane is spirally input from bottom to top along the placing column; the nitrogen is spirally input from bottom to top along the placing column.
A carburizing and quenching device for an internal spline of a shaft gear is shown in figure 1 and comprises a quenching furnace 1, wherein a pressure gauge 16 and a thermometer 17 are arranged on the quenching furnace 1; a hollow placing column 2 is arranged in the quenching furnace 1, and the bottom of the quenching furnace 1 is connected with an exhaust pipe 3; an air inlet pipe 4 is connected in the tangential direction of the side surface of the placing column 2, and a first branch pipe 5 and a second branch pipe 15 are connected on the air inlet pipe 4; a horizontal annular placing rack 6 is arranged at the top of the placing column 2, and a furnace door 7 is arranged on the side surface of the quenching furnace 1 corresponding to the placing rack 6; the top end of the quenching furnace 1 is connected with a vertically arranged telescopic cylinder 8, the bottom end of the telescopic cylinder 8 is fixed with a motor 9, and the bottom end of the motor 9 is fixed with a resistance type heating coil 10.
The air exhaust pipe 3 is connected with an air exhaust pump 11, and the air exhaust pipe 3 is provided with a check valve 12; the first branch pipe 5 and the second branch pipe 15 are both connected with a switch valve 13; the oven door 7 is provided with a sealing strip 14.
The working principle of the above embodiment is as follows: opening a furnace door 7 with one side hinged on the side surface of the quenching furnace 1, placing the semi-axis gear on a placing frame 6 at the top end of a placing column 2, closing the furnace door 7 (closing the furnace door 7 and then buckling a buckle at the other side), and sealing the furnace door 7 and the quenching furnace 1 by a sealing strip 14 on the furnace door 7; then starting the air pump 11 to pump the interior of the quenching furnace 1 to a low-pressure state through the air pump pipe 3 communicated with the bottom of the quenching furnace 1 (a thermometer 17 and a pressure gauge 16 are arranged on the quenching furnace to conveniently know the temperature and the pressure in the quenching furnace), and the check valve 12 on the air pump pipe 3 prevents the gas from flowing back from the air pump pipe 3 after the air pump 11 stops pumping; then, the telescopic cylinder 8 at the top end of the quenching furnace 1 extends downwards, so that the motor 9 descends and the resistance-type heating coil 10 extends into the half-shaft gear, the motor 9 is started to drive the resistance-type heating coil 10 to rotate, and the electrified resistance-type heating coil 10 generates heat and uniformly heats the internal spline of the half-shaft gear to a certain temperature after being electrified; then, opening a switch valve 13 on the first branch pipe 5, leading carburizing gas into the placing column 2 from the tangential direction of the placing column 2 through an air inlet pipe 4, and uniformly passing through the position of the internal spline after the carburizing gas spirally rises, so that the position of the internal spline can be uniformly carburized; after carburization is finished, the resistance-type heating coil 10 is stopped to be electrified and reset, then the switch valve 13 on the first branch pipe 5 is closed, the switch valve 13 on the second branch pipe 15 is opened, high-pressure quenching gas enters the placing column 2 along the tangential direction of the quenching furnace 1, the spiral lifting is carried out on the inner spline of the semi-axis gear, and the problem that the inner spline is damaged due to too large deformation caused by stress concentration of partial positions during quenching of the inner spline is solved.
Claims (7)
1. A carburizing and quenching method for an internal spline of a half shaft gear is characterized by comprising the following steps:
a. sleeving a compensation sleeve on a half shaft part on the half shaft gear to obtain a product A; at the moment, the thicknesses of the two ends of the half axle gear are the same;
b. vertically placing the product A into the top end of a hollow placing column in a quenching furnace, and exhausting the quenching furnace until the pressure in the quenching furnace is 150-2000 pa;
c. arranging a resistance-type heating coil at the position of an internal spline in the middle of the half axle gear, and then electrifying the resistance-type heating coil to heat the internal spline on the half axle gear to 880-950 ℃;
d. then the flow rate is led in from bottom to top through a hollow placing column and is 0.08-0.15 m3Propane per hour for 220-280 min to obtain product D;
e. then, the temperature of the internal spline of the half axle gear in the product D is reduced to 820-840 ℃, and the flow is continuously introduced into the product D at the flow rate of 0.08-0.15 m3Propane for 40-50 min to obtain product E;
f. removing the resistance heating coil, stopping introducing propane, introducing nitrogen with the pressure of 1-1.5 Mpa to the position of the spline in the half axle gear in the E product from bottom to top through a hollow placing column, and continuing for 15-20 min to obtain a product F;
g. and taking the F product out of the quenching furnace, cooling to room temperature, and then taking down the compensation sleeve on the half axle gear to obtain a finished product.
2. The carburizing and quenching method for the internal spline of the side gear according to claim 1, characterized in that: the propane is spirally input from bottom to top along the placing column.
3. The carburizing and quenching method for the internal spline of the side gear according to claim 1, characterized in that: the nitrogen is spirally input from bottom to top along the placing column.
4. A carburizing and quenching apparatus for a carburizing and quenching method for an internal spline of a side gear according to any one of claims 1 to 3, characterized in that: comprises a quenching furnace (1), wherein a pressure gauge (16) and a thermometer (17) are arranged on the quenching furnace (1); a hollow placing column (2) is arranged in the quenching furnace (1), and the bottom of the quenching furnace (1) is connected with an air exhaust pipe (3); an air inlet pipe (4) is connected in the tangential direction of the side surface of the placing column (2), and a first branch pipe (5) and a second branch pipe (15) are connected on the air inlet pipe (4); a horizontal annular placing rack (6) is arranged at the top of the placing column (2), and a furnace door (7) is arranged on the side surface of the quenching furnace (1) corresponding to the placing rack (6); the top end of the quenching furnace (1) is connected with a vertically arranged telescopic cylinder (8), the bottom end of the telescopic cylinder (8) is fixed with a motor (9), and the bottom end of the motor (9) is fixed with a resistance heating coil (10).
5. The carburizing and quenching apparatus according to claim 4, characterized in that: the air extraction pipe (3) is connected with an air extraction pump (11), and the air extraction pipe (3) is provided with a check valve (12).
6. The carburizing and quenching apparatus according to claim 4, characterized in that: the first branch pipe (5) and the second branch pipe (15) are both connected with a switch valve (13).
7. The carburizing and quenching apparatus according to claim 4, characterized in that: and a sealing strip (14) is arranged on the furnace door (7).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910992648.4A CN110541139B (en) | 2019-10-18 | 2019-10-18 | Carburizing and quenching method and carburizing and quenching equipment for internal spline of half axle gear |
| PCT/CN2019/116256 WO2021072840A1 (en) | 2019-10-18 | 2019-11-07 | Method for carburising and quenching internal spline of half shaft gear and carburising and quenching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910992648.4A CN110541139B (en) | 2019-10-18 | 2019-10-18 | Carburizing and quenching method and carburizing and quenching equipment for internal spline of half axle gear |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110541139A CN110541139A (en) | 2019-12-06 |
| CN110541139B true CN110541139B (en) | 2020-11-10 |
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| CN112481474B (en) * | 2020-11-27 | 2022-11-25 | 重庆市星极齿轮有限责任公司 | Gear carburizing and quenching heat treatment process |
| CN113751540A (en) * | 2021-07-22 | 2021-12-07 | 盐城市禾鼎机械股份有限公司 | Straightening device for non-equilibrium stressed gear after carbon-doped quenching deformation |
| CN115323312A (en) * | 2022-10-10 | 2022-11-11 | 弘集(南通)精密机械有限公司 | Carburizing and quenching method and carburizing and quenching equipment for internal spline of half axle gear |
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| JPS59129777A (en) * | 1983-01-13 | 1984-07-26 | Diesel Kiki Co Ltd | Formation of thick metallic pipe having small diameter |
| JP4516411B2 (en) * | 2004-11-16 | 2010-08-04 | 本田技研工業株式会社 | Manufacturing method for internal teeth member |
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- 2019-10-18 CN CN201910992648.4A patent/CN110541139B/en active Active
- 2019-11-07 WO PCT/CN2019/116256 patent/WO2021072840A1/en active Application Filing
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| WO2006085549A1 (en) * | 2005-02-08 | 2006-08-17 | Parker Netsushori Kogyo K.K. | High-concentration carburized/low-strain quenched member and process for producing the same |
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| WO2021072840A1 (en) | 2021-04-22 |
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