CN108486467A - A kind of automobile gear axis and its forging method - Google Patents

A kind of automobile gear axis and its forging method Download PDF

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Publication number
CN108486467A
CN108486467A CN201810401561.0A CN201810401561A CN108486467A CN 108486467 A CN108486467 A CN 108486467A CN 201810401561 A CN201810401561 A CN 201810401561A CN 108486467 A CN108486467 A CN 108486467A
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product
cooling
cooled
heating
forging
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程堂春
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Zhejiang Hengli Hardware Technology Co Ltd
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Zhejiang Hengli Hardware Technology Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
    • B21J5/08—Upsetting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/06—Making machine elements axles or shafts
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/26—Methods of annealing
    • 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
    • C21D9/30—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for crankshafts; for camshafts
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • 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
    • 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
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F17/00—Multi-step processes for surface treatment of metallic material involving at least one process provided for in class C23 and at least one process covered by subclass C21D or C22F or class C25
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C3/00—Shafts; Axles; Cranks; Eccentrics
    • F16C3/02—Shafts; Axles

Abstract

The invention discloses a kind of automobile gear axis and its forging methods.Its group in terms of following weight percent is grouped as：Carbon 0.16 0.2%, silicon 0.15 0.3%, 0.75 0.90%, of, Lin≤0.015% Liu≤0.025% of manganese, chromium 0.5 1.1%, 0.01 0.03%, Tong≤0.025% of aluminium, nickel 0.12 0.28%, molybdenum 2.98 3.58%, surplus is iron.It by the multiple repeated heating ＆ cooling of original blank, then is surface-treated, is then heated to 1,100 1300 DEG C, heat preservation；Jumping-up is carried out again, is pulled out to the specification of forging requirement, and forging temperature is 850 1300 DEG C, is then drawn into illiciumverum, sub-material, extracts microcephaly, round as a ball finishing, finally heat treatment, Carburization Treatment.The present invention improves hardness, fatigue resistance and the anti-overload ability of gear shaft while ensureing the stability in use of gear shaft.

Description

A kind of automobile gear axis and its forging method
Technical field
The present invention relates to a kind of automobile gear axis, especially a kind of automobile gear axis and its forging method.
Background technology
The forging of gear shaft includes free forging and die forging, and wherein die forging can be divided into hot forging, warm forging and cold forging, automobile Gear shaft needs to transmit larger power and bears compared with big load, it is desirable that material not only to have high bending fatigue strength and Contact fatigue strength should also have high anti-overload ability, while more stringent requirements are proposed to forging technology.Existing gear The forging of axis has that hardness, fatigue resistance, anti-overload ability difficulty reach perfect condition.
Invention content
The object of the present invention is to provide a kind of automobile gear axis and its forging methods.The present invention is ensureing gear shaft Stability in use while, improve hardness, fatigue resistance and the anti-overload ability of gear shaft.
Technical scheme of the present invention：A kind of automobile gear axis, its group in terms of following weight percent are grouped as：Carbon 0.16-0.2%, silicon 0.15-0.3%, the, of manganese 0.75-0.90%, Lin≤0.015% Liu≤0.025%, chromium 0.5-1.1%, aluminium 0.01-0.03%, Tong≤0.025%, nickel 0.12-0.28%, molybdenum 2.98-3.58%, surplus are iron.
The forging method of above-mentioned automobile gear axis, is forged in the steps below：
A, the pre-heat treatment：Original blank is placed in the Medium Frequency Induction Heating Furnace of the non-oxidation of nitrogen atmosphere protection, at least 3 repeated heating ＆ coolings, heating speed are 200-1000 DEG C/s, and for heating temperature to 750-1200 DEG C, each heating time is 3- 4min, cooling velocity are 100-800 DEG C/s, and each cooling time is 4-5min, is cooled to room temperature, obtains A product；
B, it is surface-treated：The surface of A product is polished, then cleans, dried up with wind turbine, obtain B product；
C, B product are placed in Medium Frequency Induction Heating Furnace and are heated to 1100-1300 DEG C, after keeping the temperature 3-4h, homogeneous heating obtains C Product；
D, upper hollow jumping-up drain cap and under between hollow jumping-up drain cap by C product jumping-ups, then pull out to required rule Lattice, deformation symmetrical above and below, melt down, and forging temperature is 850-1300 DEG C, obtains D product；
E, D product are suppressed into method pulling using wide anvil, suppresses downwards according to 10% drafts during pulling, then revolves It is depressed in the same way after turning 90 °, forms square section, then rotated 45 °, be drawn into illiciumverum in the same way, Obtain E product；
F, by E product sub-material, extraction microcephaly, round as a ball finishing, F product are obtained；
G, it is heat-treated, F product is placed in annealing furnace the heating of the speed with 30 DEG C/s, until being heated to 800-1000 DEG C, are protected Warm 8h, is subsequently placed in cooling furnace and is cooled to 400-650 DEG C, obtains G product；
H, G product are put into carburizer, are heated to 950 DEG C, after carrying out Carburization Treatment 0.5-1.5min, be air-cooled to after taking-up It 650 DEG C, places into quenching liquid and carries out cooling 3-6min, take out, be air-cooled to room temperature, be then placed in tempering furnace and be heated to 200- 250 DEG C, 2-4h is kept the temperature, room temperature is air-cooled to and obtains finished gear axis；
I, gear shaft finished product is subjected to subsequent processing, removes removing oxide layer and burr, examine storage.
In automobile gear axis forging method above-mentioned, the step G is to be heat-treated：By F product be placed in annealing furnace with The speed of 30 DEG C/s heats, until being heated to 800-1000 DEG C, keeps the temperature 8h, is subsequently placed in cooling furnace through air-cooled and water cooling phase In conjunction with cooling simultaneously, it is cooled to 400-650 DEG C, is subsequently placed in natural cooling in air, obtains G product.
In automobile gear axis forging method above-mentioned, total forging ratio is more than 5.
Compared with prior art,
The present invention takes the cooling mode of multiple Rapid Circulation heating and is anticipated to material, carefully in forging Change crystal grain, improves the endurance to high speed top load and impact, improve the intensity and plasticity of gear forgings；By specific The collocation of component and specific heat treatment mode so that hardness, bulk strength, the anti-overload ability of gear shaft are improved, and are passed through Grinding process, oxide layer are convenient for subsequent forging, reduce in forging process and the dirty phenomenon of folder occur, surface quality is good, production The mechanical property of product further improves, and has saved product materials.Internal grain degree grade is 7- after the gear shaft is forged 8 grades, meet engineering requirement.
Specific implementation mode
With reference to embodiment, the present invention is further illustrated, but is not intended as the foundation limited the present invention.
Embodiment 1.
A kind of automobile gear axis, its group in terms of following weight percent are grouped as：Carbon 0.16%, silicon 0.18%, manganese 0.80%, phosphorus 0.012%, sulphur 0.021%, chromium 0.6%, aluminium 0.02%, copper 0.021%, nickel 0.14%, molybdenum 3.00%, surplus For iron.
The forging method of above-mentioned automobile gear axis, is forged in the steps below：
A, the pre-heat treatment：Original blank is placed in the Medium Frequency Induction Heating Furnace of the non-oxidation of nitrogen atmosphere protection, at least 3 repeated heating ＆ coolings, heating speed are 600 DEG C/s, and for heating temperature to 800 DEG C, each heating time is 3min, cooling speed Degree is 500 DEG C/s, and each cooling time is 5min, is cooled to room temperature, obtains A product；
B, it is surface-treated：The surface of A product is polished, then cleans, dried up with wind turbine, obtain B product；
C, B product are placed in Medium Frequency Induction Heating Furnace and are heated to 1100 DEG C, after keeping the temperature 4h, homogeneous heating obtains C product；
D, upper hollow jumping-up drain cap and under between hollow jumping-up drain cap by C product jumping-ups, then pull out to required rule Lattice, deformation symmetrical above and below, melt down, and forging temperature is 1200 DEG C, obtains D product；
E, D product are suppressed into method pulling using wide anvil, suppresses downwards according to 10% drafts during pulling, then revolves It is depressed in the same way after turning 90 °, forms square section, then rotated 45 °, be drawn into illiciumverum in the same way, Obtain E product；Total forging ratio is more than 5.
F, by E product sub-material, extraction microcephaly, round as a ball finishing, F product are obtained；
G, F product are placed in annealing furnace the heating of the speed with 30 DEG C/s, until being heated to 800 DEG C, keep the temperature 8h, then set It is combined while cooling down through air-cooled and water cooling in cooling furnace, be cooled to 400-650 DEG C, be subsequently placed in natural cooling in air, Obtain G product.
H, G product are put into carburizer, are heated to 950 DEG C, after carrying out Carburization Treatment 0.6min, 650 are air-cooled to after taking-up DEG C, it places into quenching liquid and carries out cooling 3min, take out, be air-cooled to room temperature, be then placed in tempering furnace and be heated to 200 DEG C, heat preservation 2-4h is air-cooled to room temperature and obtains finished gear axis；
I, gear shaft finished product is subjected to subsequent processing, removes removing oxide layer and burr, examine storage.
After above-mentioned processing, grain size is 7 grades, and the hardness of gear teeth face has reached 87.3HRC, carburized layer depth Degree is 0.78mm.
Embodiment 2.
A kind of automobile gear axis, its group in terms of following weight percent are grouped as：Carbon 0.18%, silicon 0.20%, manganese 0.80%, phosphorus 0.008%, sulphur 0.010%, chromium 0.6%, aluminium 0.020%, copper 0.015%, nickel 0.18%, molybdenum 3.01% are remaining Amount is iron.
The forging method of above-mentioned automobile gear axis, is forged in the steps below：
A, the pre-heat treatment：Original blank is placed in the Medium Frequency Induction Heating Furnace of the non-oxidation of nitrogen atmosphere protection, at least 3 repeated heating ＆ coolings, heating speed are 500 DEG C/s, and for heating temperature to 900 DEG C, each heating time is 3.5min, cooling Speed is 550 DEG C/s, and each cooling time is 4min, is cooled to room temperature, obtains A product；
B, it is surface-treated：The surface of A product is polished, then cleans, dried up with wind turbine, obtain B product；
C, B product are placed in Medium Frequency Induction Heating Furnace and are heated to 1200 DEG C, after keeping the temperature 3.5h, homogeneous heating obtains C product；
D, upper hollow jumping-up drain cap and under between hollow jumping-up drain cap by C product jumping-ups, then pull out to required rule Lattice, deformation symmetrical above and below, melt down, and forging temperature is 850-1300 DEG C, obtains D product；
E, D product are suppressed into method pulling using wide anvil, suppresses downwards according to 10% drafts during pulling, then revolves It is depressed in the same way after turning 90 °, forms square section, then rotated 45 °, be drawn into illiciumverum in the same way, Obtain E product；Total forging ratio is more than 5.
F, by E product sub-material, extraction microcephaly, round as a ball finishing, F product are obtained；
G, F product are placed in annealing furnace the heating of the speed with 30 DEG C/s, until being heated to 900 DEG C, keep the temperature 8h, then set It is combined while cooling down through air-cooled and water cooling in cooling furnace, be cooled to 500 DEG C, be subsequently placed in natural cooling in air, obtain G Product.
H, G product are put into carburizer, are heated to 950 DEG C, after carrying out Carburization Treatment 1min, 650 DEG C are air-cooled to after taking-up, It places into quenching liquid and carries out cooling 4min, take out, be air-cooled to room temperature, be then placed in tempering furnace and be heated to 230 DEG C, keep the temperature 3h, It is air-cooled to room temperature and obtains finished gear axis；
I, gear shaft finished product is subjected to subsequent processing, removes removing oxide layer and burr, examine storage.
After above-mentioned processing, grain size is 8 grades, and the hardness of gear teeth face has reached 91.0HRC, carburized layer depth Degree is 0.86mm.
Embodiment 3.
A kind of automobile gear axis, its group in terms of following weight percent are grouped as：Carbon 0.19%, silicon 0.21%, manganese 0.85%, phosphorus 0.010%, sulphur 0.020%, chromium 0.6%, aluminium 0.03%, copper 0.010%, nickel 0.20%, molybdenum 3.15%, surplus For iron.
The forging method of above-mentioned automobile gear axis, is forged in the steps below：
A, the pre-heat treatment：Original blank is placed in the Medium Frequency Induction Heating Furnace of the non-oxidation of nitrogen atmosphere protection, at least 3 repeated heating ＆ coolings, heating speed are 800 DEG C/s, and for heating temperature to 1200 DEG C, each heating time is 4min, cooling speed Degree is 800 DEG C/s, and each cooling time is 5min, is cooled to room temperature, obtains A product；
B, it is surface-treated：The surface of A product is polished, then cleans, dried up with wind turbine, obtain B product；
C, B product are placed in Medium Frequency Induction Heating Furnace and are heated to 1300 DEG C, after keeping the temperature 4h, homogeneous heating obtains C product；
D, upper hollow jumping-up drain cap and under between hollow jumping-up drain cap by C product jumping-ups, then pull out to required rule Lattice, deformation symmetrical above and below, melt down, and forging temperature is 1300 DEG C, obtains D product；
E, D product are suppressed into method pulling using wide anvil, suppresses downwards according to 10% drafts during pulling, then revolves It is depressed in the same way after turning 90 °, forms square section, then rotated 45 °, be drawn into illiciumverum in the same way, Obtain E product；Total forging ratio is more than 5.
F, by E product sub-material, extraction microcephaly, round as a ball finishing, F product are obtained；
G, F product are placed in annealing furnace the heating of the speed with 30 DEG C/s, until being heated to 1000 DEG C, keep the temperature 8h, then set It is combined while cooling down through air-cooled and water cooling in cooling furnace, be cooled to 650 DEG C, be subsequently placed in natural cooling in air, obtain G Product；
H, G product are put into carburizer, are heated to 950 DEG C, after carrying out Carburization Treatment 1.5min, 650 are air-cooled to after taking-up DEG C, it places into quenching liquid and carries out cooling 5min, take out, be air-cooled to room temperature, be then placed in tempering furnace and be heated to 250 DEG C, heat preservation 4h is air-cooled to room temperature and obtains finished gear axis；
I, gear shaft finished product is subjected to subsequent processing, removes removing oxide layer and burr, examine storage.By above-mentioned processing it Afterwards, grain size is 9 grades, and the hardness of gear teeth face has reached 92.3HRC, carburized (case) depth 0.90mm.

Claims (4)

1. a kind of automobile gear axis, it is characterised in that：Its group in terms of following weight percent is grouped as：Carbon 0.16- 0.2%, silicon 0.15-0.3%, the, of manganese 0.75-0.90%, Lin≤0.015% Liu≤0.025%, chromium 0.5-1.1%, aluminium 0.01- 0.03%, Tong≤0.025%, nickel 0.12-0.28%, molybdenum 2.98-3.58%, surplus are iron.
2. the forging method of automobile gear axis as described in claim 1, it is characterised in that：It forges in the steps below：
A, the pre-heat treatment：Original blank is placed in the Medium Frequency Induction Heating Furnace of the non-oxidation of nitrogen atmosphere protection, is followed at least 3 times Ring heating cooling, heating speed are 200-1000 DEG C/s, and for heating temperature to 750-1200 DEG C, each heating time is 3-4min, Cooling velocity is 100-800 DEG C/s, and each cooling time is 4-5min, is cooled to room temperature, obtains A product；
B, it is surface-treated：The surface of A product is polished, then cleans, dried up with wind turbine, obtain B product；
C, B product are placed in Medium Frequency Induction Heating Furnace and are heated to 1100-1300 DEG C, after keeping the temperature 3-4h, homogeneous heating obtains C product；
D, upper hollow jumping-up drain cap and under between hollow jumping-up drain cap by C product jumping-ups, then pull out to required specification, up and down Symmetric deformation melts down, and forging temperature is 850-1300 DEG C, obtains D product；
E, D product are suppressed into method pulling using wide anvil, suppresses downwards according to 10% drafts during pulling, is then rotated by 90 ° It depresses in the same way afterwards, forms square section, then rotate 45 °, be drawn into illiciumverum in the same way, obtain E product；
F, by E product sub-material, extraction microcephaly, round as a ball finishing, F product are obtained；
G, it is heat-treated, F product is placed in annealing furnace the heating of the speed with 30 DEG C/s, until being heated to 800-1000 DEG C, keep the temperature 8h, It is subsequently placed in cooling furnace and is cooled to 400-650 DEG C, obtain G product；
H, G product are put into carburizer, are heated to 950 DEG C, after carrying out Carburization Treatment 0.5-1.5min, 650 DEG C are air-cooled to after taking-up, It places into quenching liquid and carries out cooling 3-6min, take out, be air-cooled to room temperature, be then placed in tempering furnace and be heated to 200-250 DEG C, protect Warm 2-4h is air-cooled to room temperature and obtains finished gear axis；
I, gear shaft finished product is subjected to subsequent processing, removes removing oxide layer and burr, examine storage.
3. the forging method of automobile gear axis as shown in claim 2, it is characterised in that：The step G is to be heat-treated： F product are placed in annealing furnace the heating of the speed with 30 DEG C/s, until being heated to 800-1000 DEG C, 8h is kept the temperature, is subsequently placed in cooling It is combined while cooling down through air-cooled and water cooling in stove, be cooled to 400-650 DEG C, be subsequently placed in natural cooling in air, obtain G product.
4. the forging method of automobile gear axis as shown in claim 2, it is characterised in that：Total forging ratio is more than 5.
CN201810401561.0A 2018-04-28 2018-04-28 A kind of automobile gear axis and its forging method Withdrawn CN108486467A (en)

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CN108994247A (en) * 2018-09-17 2018-12-14 杭州金越晟重型机械有限公司 A kind of gear shaft forging technology
CN110373607A (en) * 2019-07-25 2019-10-25 广东韶钢松山股份有限公司 A kind of H10Cr4Mo4Ni4V, high-temperature carburizing steel member and preparation method

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108994247A (en) * 2018-09-17 2018-12-14 杭州金越晟重型机械有限公司 A kind of gear shaft forging technology
CN110373607A (en) * 2019-07-25 2019-10-25 广东韶钢松山股份有限公司 A kind of H10Cr4Mo4Ni4V, high-temperature carburizing steel member and preparation method
CN110373607B (en) * 2019-07-25 2021-04-02 广东韶钢松山股份有限公司 High-temperature carburized steel, high-temperature carburized steel component and preparation method thereof

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