CN108531851A - A kind of heat treatment process of shallow-tank separator sprocket wheel - Google Patents
A kind of heat treatment process of shallow-tank separator sprocket wheel Download PDFInfo
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- CN108531851A CN108531851A CN201810391483.0A CN201810391483A CN108531851A CN 108531851 A CN108531851 A CN 108531851A CN 201810391483 A CN201810391483 A CN 201810391483A CN 108531851 A CN108531851 A CN 108531851A
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- sprocket wheel
- temperature
- heat treatment
- carburizer
- shallow
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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
- C23C8/22—Carburising of ferrous surfaces
-
- 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
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- 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
- C21D9/34—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tyres; for rims
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
- Heat Treatment Of Articles (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Abstract
The invention belongs to technical field of heat treatment, are related to a kind of heat treatment process of shallow-tank separator sprocket wheel.The material of the sprocket wheel is 42CrMo steel alloys, and heat treatment process is specially：1. heat stepwise carburizer；2. carburizing；3. quenching；4. tempering.Using the present invention, the shallow-tank separator sprocket wheel produced, the hardness of carburized surface is up to 58~63HRC, and for the hardness on other surfaces up to 35~45HRC, production cost is relatively low, suitable for promoting.
Description
Technical field
The invention belongs to technical field of heat treatment, are related to a kind of heat treatment process of shallow-tank separator sprocket wheel.
Background technology
The sprocket wheel of existing import shallow-tank separator, material are a kind of low-carbon alloy steel, Chang Weichi frequently with 20CrMnTi
Wheel steel；When the material is used for the sprocket wheel of shallow-tank separator, often since production cost is excessively high, product surface hardness is too low, makes
The normal operation of equipment and the economic benefit of manufacturing enterprise are affected the defects of too short with the service life.
Invention content
The purpose of the present invention is to provide a kind of heat treatment process of shallow-tank separator sprocket wheel, select suitable material and pass through
Specific heat treatment process is crossed, the sprocket wheel of low cost, high rigidity is obtained, effectively improves economic benefit.
The present invention solve above-mentioned technical problem technical solution be：
The material of a kind of heat treatment process of shallow-tank separator sprocket wheel, the sprocket wheel is 42CrMo steel alloys；
The heat treatment process of the sprocket wheel is：
(1) heat stepwise carburizer, detailed process are：
S1. carburizer is warming up to 300 DEG C and keeps the temperature 1h, in temperature-rise period, when furnace body temperature reaches 200 DEG C, beaten
Blow in machine and blower cooling water；
S2. 500 DEG C are warming up to and keeps the temperature 1h；
S3. 700 DEG C are warming up to and keeps the temperature 1h；
S4. 930 DEG C are warming up to；
(2) carburizing：
S1. workpiece is packed into charging basket, and makes to keep gap between adjacent workpieces, to ensure that air circulation and carburizing are uniform；
Charging basket equipped with workpiece, is packed into burner hearth rapidly, and cover bell by the bell for S2. opening carburizer；
S3. it is persistently heated after workpiece is packed into the burner hearth of carburizer, when furnace body temperature reaches 850 DEG C, starts the
Primary to instill kerosene, rate of addition is 45 drops/min~55 drops/min, and methanol does not instill at this time, and lights discharged exhaust gas；
Continue heating when temperature is raised to 930 DEG C, start second and instill kerosene, at this time the rate of addition of kerosene be 100 drops/min~
110 drops/min, and methanol is instilled simultaneously, and the rate of addition of methanol is 25 drops/min~35 drops/min；The retort of the carburizer
The instillation speed of a diameter of 550mm~650mm, kerosene go out according to retort diameter calculation；
S4. during instilling kerosene, flare color is orange colour, and the length of 80mm~120mm, in carburizer
Pressure be 200Pa~500Pa, i.e., water column drop be 20mm~50mm；
S5. after furnace body temperature reaches 930 DEG C, 8h is kept the temperature, turns off heating power supply to stop heating, in this process
In, wind turbine and blower cooling water remain in operation；Workpiece is taken out when the time of carburizing process is close to 7.5h, and checks carburized layer depth
Whether degree reaches technology requirement；
(3) it quenches：
S1. when the temperature in carburizer is cooled to 860 DEG C, wind turbine and blower cooling water are closed；It is anti-to put on protection clothing
It only scalds, after wind turbine stops operating, opens bell, lift by crane workpiece；
S2. workpiece is put into oil sump rapidly, and Fire Hazard Area, after workpiece is completely into oil sump, workpiece is made constantly to swim
It is dynamic, ensure uniform quenching；Meanwhile the Oil-temperature control in oil sump, between 25 DEG C~35 DEG C, winter should be first to the quenching in oil sump
Oil is preheated；After quenching, examine whether the hardness of quenching workpiece reaches technology requirement；
(4) it is tempered：
After taking out quenching workpiece and going out quenching oil control, it is packed into tempering furnace, 190 DEG C is warming up to and comes out of the stove after keeping the temperature 2h, from
It is so cooled to room temperature, and checks whether the hardness of tempering workpiece reaches technology requirement.
Utilize having the beneficial effect that for shallow-tank separator sprocket wheel heat treatment process of the present invention：Use material for 42CrMo steel alloys
Forge piece, and the shallow-tank separator sprocket wheel produced through heat treatment process such as over carburizing, quenching, tempering, carburized surface
Hardness is up to 58~63HRC, other surfaces, such as can at through hardening core hardness up to 35~45HRC；Meanwhile this heat treatment work
The production cost of skill is relatively low, introduces to the market extensively, and obtains good user feedback.
Specific implementation mode
The material of a kind of heat treatment process of shallow-tank separator sprocket wheel, the sprocket wheel is 42CrMo steel alloys；
The heat treatment process of the sprocket wheel is：
(1) heat stepwise carburizer, detailed process are：
S1. carburizer is warming up to 300 DEG C and keeps the temperature 1h, in temperature-rise period, when furnace body temperature reaches 200 DEG C, beaten
Blow in machine and blower cooling water；
S2. 500 DEG C are warming up to and keeps the temperature 1h；
S3. 700 DEG C are warming up to and keeps the temperature 1h；
S4. 930 DEG C are warming up to；
In addition, using carburizer if first time, then kerosene, rate of addition must be instilled when being warming up to 850 DEG C or so
It for 45 drops/min~55 drops/min, must not be instilled less than 850 DEG C, methanol does not instill at this time；If carburizer is used continuously, only need
Open wind turbine and blower cooling water；
(2) carburizing：
S1. workpiece is packed into charging basket, and makes to keep gap between adjacent workpieces；
Charging basket equipped with workpiece, is packed into burner hearth rapidly, and cover bell by the bell for S2. opening carburizer；
S3. it is persistently heated after workpiece is packed into the burner hearth of carburizer, when furnace body temperature reaches 850 DEG C, starts the
Primary to instill kerosene, rate of addition is 50 drops/min, and lights discharged exhaust gas；Continue heating when temperature is raised to 930 DEG C,
Start second and instill kerosene, the rate of addition of kerosene is 105 drops/min at this time, and instills methanol simultaneously, and the dropwise addition of methanol
Speed is 30 drops/min；The a diameter of 600mm of retort of the carburizer checks the drop of kerosene and methanol often during dropwise addition
Enter dosage, and observes inlet hole and whether gas vent is unobstructed；
S4. during instilling kerosene, flare color is orange colour, and the length of 80mm~120mm, in carburizer
Pressure be 200Pa~500Pa, i.e., water column drop be 20mm~50mm；
S5. after furnace body temperature reaches 930 DEG C, 8h is kept the temperature, turns off heating power supply to stop heating, in this process
In, wind turbine and blower cooling water remain in operation；Workpiece is taken out when the time of carburizing process is close to 7.5h, and checks carburized layer depth
Whether degree reaches technology requirement；
(3) it quenches：
S1. when the temperature in carburizer is cooled to 860 DEG C, wind turbine and blower cooling water are closed；It is anti-to put on protection clothing
It only scalds, after wind turbine stops operating, opens bell, lift by crane workpiece；
S2. workpiece is put into oil sump rapidly, and Fire Hazard Area, after workpiece is completely into oil sump, workpiece is made constantly to swim
It is dynamic, ensure uniform quenching；Meanwhile the Oil-temperature control in oil sump, between 30 DEG C, winter should first carry out the quenching oil in oil sump
Preheating；After quenching, examine whether the hardness of quenching workpiece reaches technology requirement；
(4) it is tempered：
After taking out quenching workpiece and going out quenching oil control, it is packed into tempering furnace, 190 DEG C is warming up to and comes out of the stove after keeping the temperature 2h, from
It is so cooled to room temperature, and checks whether the hardness of tempering workpiece reaches technology requirement.
By the shallow-tank separator sprocket wheel prepared by above-mentioned processing step, the hardness of carburized surface is 58~63HRC,
Its surface can the hardness of core be such as 35~45HRC at through hardening.
Claims (7)
1. a kind of heat treatment process of shallow-tank separator sprocket wheel, which is characterized in that the material of the sprocket wheel is 42CrMo steel alloys；
The heat treatment process of the sprocket wheel is：
(1) heat stepwise carburizer：By way of heat stepwise, the temperature of carburizer is made to reach 930 DEG C；
(2) carburizing：
S1. workpiece is packed into charging basket, gap is kept between adjacent workpieces；
S2. charging basket is packed into the burner hearth of carburizer；
S3. continuous heating carburizer starts to instill kerosene for the first time, and light and discharged when furnace body temperature reaches 850 DEG C
Exhaust gas continues heating when temperature is raised to 930 DEG C, starts second and instills kerosene, and instills methanol simultaneously；
S4. during instilling kerosene, the pressure in carburizer is 200Pa~500Pa；
S5. after furnace body temperature reaches 930 DEG C, 8h is kept the temperature, then stop heating；
(3) it quenches：
It when the temperature in carburizer is cooled to 860 DEG C, puts the workpiece in oil sump, and the workpiece that constantly moves about；
(4) it is tempered：
It is packed into tempering furnace after quenching oil control in workpiece is gone out, be warming up to 190 DEG C and is come out of the stove after keeping the temperature 2h, room is naturally cooled to
Temperature.
2. a kind of heat treatment process of shallow-tank separator sprocket wheel as described in claim 1, which is characterized in that the step (1)
The detailed process of heat stepwise carburizer is：
S1. carburizer is warming up to 300 DEG C and keeps the temperature 1h；
S2. 500 DEG C are warming up to and keeps the temperature 1h；
S3. 700 DEG C are warming up to and keeps the temperature 1h；
S4. 930 DEG C are warming up to.
3. a kind of heat treatment process of shallow-tank separator sprocket wheel as described in claim 1, which is characterized in that the step (2)
In the S3 of carburizing process, when instilling kerosene for the first time, the rate of addition of kerosene is 45 drops/min~55 drops/min.
4. a kind of heat treatment process of shallow-tank separator sprocket wheel as described in claim 1, which is characterized in that the step (2)
In the S3 of carburizing process, when instilling kerosene for the second time, the rate of addition of kerosene is 100 drops/min~110 drops/min.
5. a kind of heat treatment process of shallow-tank separator sprocket wheel as described in claim 1, which is characterized in that the step (2)
In the S3 of carburizing process, the rate of addition of methanol is 25 drops/min~35 drops/min.
6. a kind of heat treatment process of shallow-tank separator sprocket wheel as described in claim 1, which is characterized in that the step (3)
In quenching process, the Oil-temperature control in oil sump is between 25 DEG C~35 DEG C.
7. a kind of heat treatment process of shallow-tank separator sprocket wheel as described in claim 1, which is characterized in that the carburizer
A diameter of 550mm~the 650mm of retort.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810391483.0A CN108531851B (en) | 2018-04-27 | 2018-04-27 | Heat treatment process for sprocket of shallow slot separator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810391483.0A CN108531851B (en) | 2018-04-27 | 2018-04-27 | Heat treatment process for sprocket of shallow slot separator |
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| Publication Number | Publication Date |
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| CN108531851A true CN108531851A (en) | 2018-09-14 |
| CN108531851B CN108531851B (en) | 2020-05-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810391483.0A Active CN108531851B (en) | 2018-04-27 | 2018-04-27 | Heat treatment process for sprocket of shallow slot separator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109112469A (en) * | 2018-09-19 | 2019-01-01 | 温岭市大山热处理厂（普通合伙） | A kind of connector heat treatment process of 42CrMo material |
| CN113943916A (en) * | 2021-10-20 | 2022-01-18 | 石家庄双剑工具有限公司 | File manufacturing process |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1693529A (en) * | 2005-04-29 | 2005-11-09 | 张文忠 | Thin layer carburation technology for crane chain of lifting equipment |
| CN105154633A (en) * | 2015-10-26 | 2015-12-16 | 江苏保捷锻压有限公司 | Rapid carburizing heat treatment technology of driving gear for automobile differential mechanism |
| CN105543770A (en) * | 2015-12-22 | 2016-05-04 | 湖北鄂瑞孚截齿钻具科技有限公司 | Surface treatment technique for cutting pick |
| CN105695925A (en) * | 2014-11-28 | 2016-06-22 | 重庆基石机械有限公司 | Carburizing process for gear shaft |
| CN106141595A (en) * | 2016-08-11 | 2016-11-23 | 镇江市宝偃工程机械有限公司 | The soldering of pick and heat treatment integrated technique |
-
2018
- 2018-04-27 CN CN201810391483.0A patent/CN108531851B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1693529A (en) * | 2005-04-29 | 2005-11-09 | 张文忠 | Thin layer carburation technology for crane chain of lifting equipment |
| CN105695925A (en) * | 2014-11-28 | 2016-06-22 | 重庆基石机械有限公司 | Carburizing process for gear shaft |
| CN105154633A (en) * | 2015-10-26 | 2015-12-16 | 江苏保捷锻压有限公司 | Rapid carburizing heat treatment technology of driving gear for automobile differential mechanism |
| CN105543770A (en) * | 2015-12-22 | 2016-05-04 | 湖北鄂瑞孚截齿钻具科技有限公司 | Surface treatment technique for cutting pick |
| CN106141595A (en) * | 2016-08-11 | 2016-11-23 | 镇江市宝偃工程机械有限公司 | The soldering of pick and heat treatment integrated technique |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109112469A (en) * | 2018-09-19 | 2019-01-01 | 温岭市大山热处理厂（普通合伙） | A kind of connector heat treatment process of 42CrMo material |
| CN113943916A (en) * | 2021-10-20 | 2022-01-18 | 石家庄双剑工具有限公司 | File manufacturing process |
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| CN108531851B (en) | 2020-05-22 |
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