CN104128773A - Gear production process beneficial to improving production efficiency - Google Patents
Gear production process beneficial to improving production efficiency Download PDFInfo
- Publication number
- CN104128773A CN104128773A CN201410355063.9A CN201410355063A CN104128773A CN 104128773 A CN104128773 A CN 104128773A CN 201410355063 A CN201410355063 A CN 201410355063A CN 104128773 A CN104128773 A CN 104128773A
- Authority
- CN
- China
- Prior art keywords
- gear
- temperature
- stage
- conducive
- gear production
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/14—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass gear parts, e.g. gear wheels
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a gear production process beneficial to improving production efficiency. The gear production process includes the steps of bar material cutting, machine work, heat treatment, finishing cut and ground finish which are conducted in sequence. Bar materials are made of 20 CrMnTiH. The heat treatment includes the procedures that blanks obtained through machine work are heated to the temperature of 600-920 DEG C for carburizing treatment, and the temperature of 600-920 DEG C is maintained for being not less than 3 hours during carburizing treatment; segmented heating is adopted as a heating mode and includes a first stage of preheating with a persistent period of 20-30 minutes at the temperature of 600-870 DEG C, a second stage of carburizing with a persistent period of 1.5-2 hours at the temperature of 870-920 DEG C, a third stage of diffusing with a persistent period of 1-1.2 hours at the temperature of 870-900 DEG C and a fourth stage of retarded cooling, the blanks are quenched after retarded cooling is carried out until the temperature of 500-600 DEG C is reached, the quenched blanks are heated to the temperature of 170-200 DEG C, heat preservation is conducted for being not less than 3 hours, and then tempering is carried out. The process is simple in procedure and short in time, and gears with surface hardening layers which are not prone to falling off, shock resistance capacity, abrasive resistance and appropriate intensity can be easily obtained.
Description
Technical field
The present invention relates to the drive disk assembly manufacturing process for transmission of torque, particularly relate to a kind of Gear Production technique that is conducive to enhance productivity.
Background technology
Gear is the critical component in plant equipment, and the quality of gear quality is directly connected to the service life of whole equipment.And the quality of gear quality depends on gear material and Technology for Heating Processing thereof to a great extent.Therefore, the domestic and international producer relevant to gear manufacture all very payes attention to the research and development of gear material and heat treatment technics thereof.
The material of prior art middle gear is selected the generally stressed and working environment in transmission system according to gear, and Technology for Heating Processing is that the corrosion resistance that ensures gear surface thin hardened layer, gear surface and centre hardness, gear meets the means of technological requirement.The higher grade of product martensite metallographic that the heat treatment that is 20CrMnTiH gear for material in prior art obtains, in use very easily there is under external force work hardening in the gear obtaining like this, cause gear within a short period of time superficial layer disengaging to occur, have a strong impact on gear-driven stability and service life.
Summary of the invention
The higher grade of product martensite metallographic obtaining for the heat treatment that is 20CrMnTiH gear for material in above-mentioned prior art, in use very easily there is under external force work hardening in the gear obtaining like this, causing gear that superficial layer occurs within a short period of time departs from, have a strong impact on the problem in gear-driven stability and service life, the invention provides a kind of Gear Production technique that is conducive to enhance productivity.
For the problems referred to above, a kind of Gear Production technique that is conducive to enhance productivity provided by the invention reaches goal of the invention by following technical essential: a kind of Gear Production technique that is conducive to enhance productivity, comprise bar blank in sequence, machining, heat treatment, essence cutting and grinding, the material of described bar is 20CrMnTiH, described heat treatment comprises that the blank that machining is obtained is heated to 600-920 DEG C and carries out Carburization Treatment, and in Carburization Treatment, above temperature hold-time is no less than 3h, the described heat stepwise that is heated to be, the 600-870 DEG C of preheating that the duration that is respectively the first stage is 20-30min, the 870-920 of the 1.5-2h of second stage DEG C carburizing, the 870-900 of phase III 1-1.2h DEG C diffusion, the slow cooling of fourth stage, blank slow cooling is quenched during to 500-600 DEG C, blank after quenching is heated to 170-200 DEG C and insulation to be no less than 3h and to carry out tempering.
Further technical scheme is:
Between described machining and heat treatment, also comprise oil removing cleaning step.
Described oil removing cleaning step is that to adopt temperature be the oil-removing cleaning agent of 50-65 DEG C is no less than 30min immersion treatment to blank.
Between described heat treatment and essence cutting, also comprise the bead that is no less than 15min.
Described slow cooling is that stove is cold.
Described quenching is oil cooling, and oil temperature remains within the scope of 80-120 DEG C.
Between described oil cooling and tempering step, also comprise cleaning step.
The present invention has following beneficial effect:
Ring gauge manufacturing approach craft provided by the invention is simple, the 70-80% that heat treatment and carburizing time summation are prior art, the metallographic structure crystal grain of final gear product has obtained refinement simultaneously, gear product martensitic structure metallographic grade is 3, adopt gear martensitic structure metallographic grade that this material obtains 2-3 the grade that declined compared to prior art, simultaneously, by above Technology for Heating Processing, the gear surface hardness obtaining remains on 59-60HRC, it is upper that centre hardness grade remains on 35-36HRC, and case-hardening layer thickness is 1.3-1.4mm.Above product gear parameter make gear in use cementation zone be difficult for disengagings, gear impact resistance, wearability and intensity suitable, be equal 5-7 times of adopting gear that existing Technology for Heating Processing obtains the service life of gear.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail, but structure of the present invention is not limited only to following examples.
Embodiment 1:
A kind of Gear Production technique that is conducive to enhance productivity, comprise bar blank in sequence, machining, heat treatment, essence cutting and grinding, the material of described bar is 20CrMnTiH, described heat treatment comprises that the blank that machining is obtained is heated to 600-920 DEG C and carries out Carburization Treatment, and in Carburization Treatment, above temperature hold-time is no less than 3h, the described heat stepwise that is heated to be, the 600-870 DEG C of preheating that the duration that is respectively the first stage is 20-30min, the 870-920 of the 1.5-2h of second stage DEG C carburizing, the 870-900 of phase III 1-1.2h DEG C diffusion, the slow cooling of fourth stage, blank slow cooling is quenched during to 500-600 DEG C, blank after quenching is heated to 170-200 DEG C and insulation to be no less than 3h and to carry out tempering.
Ring gauge manufacturing approach craft provided by the invention is simple, the 70-80% that heat treatment and carburizing time summation are prior art, the metallographic structure crystal grain of final gear product has obtained refinement simultaneously, gear product martensitic structure metallographic grade is 3, adopt gear martensitic structure metallographic grade that this material obtains 2-3 the grade that declined compared to prior art, simultaneously, by above Technology for Heating Processing, the gear surface hardness obtaining remains on 59-60HRC, it is upper that centre hardness grade remains on 35-36HRC, and case-hardening layer thickness is 1.3-1.4mm.Above product gear parameter make gear in use cementation zone be difficult for disengagings, gear impact resistance, wearability and intensity suitable, be equal 5-7 times of adopting gear that existing Technology for Heating Processing obtains the service life of gear.
Embodiment 2:
The present embodiment is further qualified on the basis of embodiment 1, for the oil pollution that in process route between elimination machining, plant equipment or environment cause blank, avoid greasy dirt to affect thermal effectiveness, between described machining and heat treatment, also comprise oil removing cleaning step.
For obtaining good oil removing cleaning performance and cleaning efficiency, described oil removing cleaning step is that to adopt temperature be the oil-removing cleaning agent of 50-65 DEG C is no less than 30min immersion treatment to blank.
For further strengthening the surface quality of product, between described heat treatment and essence cutting, also comprise the bead that is no less than 15min.
For preventing that in cooling procedure, oxidizing gas etc. impacts the surface of blank, described slow cooling is that stove is cold.Further, described quenching is oil cooling, and oil temperature remains within the scope of 80-120 DEG C.
For avoiding tempering effect to be subject to the impact of other factors, between described oil cooling and tempering step, also comprise cleaning step.
Above content is the further description of the present invention being done in conjunction with concrete preferred embodiment, can not assert that the specific embodiment of the present invention is confined to these explanations.For general technical staff of the technical field of the invention, not departing from other embodiments that draw under technical scheme of the present invention, all should be included in protection scope of the present invention.
Claims (7)
1. a Gear Production technique that is conducive to enhance productivity, comprise bar blank in sequence, machining, heat treatment, essence cutting and grinding, it is characterized in that, the material of described bar is 20CrMnTiH, described heat treatment comprises that the blank that machining is obtained is heated to 600-920 DEG C and carries out Carburization Treatment, and in Carburization Treatment, above temperature hold-time is no less than 3h, the described heat stepwise that is heated to be, the 600-870 DEG C of preheating that the duration that is respectively the first stage is 20-30min, the 870-920 of the 1.5-2h of second stage DEG C carburizing, the 870-900 of phase III 1-1.2h DEG C diffusion, the slow cooling of fourth stage, blank slow cooling is quenched during to 500-600 DEG C, blank after quenching is heated to 170-200 DEG C and insulation to be no less than 3h and to carry out tempering.
2. a kind of Gear Production technique that is conducive to enhance productivity according to claim 1, is characterized in that, also comprises oil removing cleaning step between described machining and heat treatment.
3. a kind of Gear Production technique that is conducive to enhance productivity according to claim 2, is characterized in that, described oil removing cleaning step is that to adopt temperature be the oil-removing cleaning agent of 50-65 DEG C is no less than 30min immersion treatment to blank.
4. a kind of Gear Production technique that is conducive to enhance productivity according to claim 1, is characterized in that, between described heat treatment and essence cutting, also comprises the bead that is no less than 15min.
5. a kind of Gear Production technique that is conducive to enhance productivity according to claim 1, is characterized in that, described slow cooling is that stove is cold.
6. a kind of Gear Production technique that is conducive to enhance productivity according to claim 1, is characterized in that, described quenching is oil cooling, and oil temperature remains within the scope of 80-120 DEG C.
7. a kind of Gear Production technique that is conducive to enhance productivity according to claim 6, is characterized in that, also comprises cleaning step between described oil cooling and tempering step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410355063.9A CN104128773A (en) | 2014-07-24 | 2014-07-24 | Gear production process beneficial to improving production efficiency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410355063.9A CN104128773A (en) | 2014-07-24 | 2014-07-24 | Gear production process beneficial to improving production efficiency |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104128773A true CN104128773A (en) | 2014-11-05 |
Family
ID=51801767
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410355063.9A Pending CN104128773A (en) | 2014-07-24 | 2014-07-24 | Gear production process beneficial to improving production efficiency |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104128773A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009052119A (en) * | 2007-08-29 | 2009-03-12 | Ntn Corp | Heat-treatment method for steel, method for producing machine part, and machine part |
| CN102703909A (en) * | 2012-05-24 | 2012-10-03 | 浙江吉利汽车研究院有限公司杭州分公司 | Combined carburizing and quenching process for improving gear performance |
| CN102776470A (en) * | 2012-07-09 | 2012-11-14 | 陈曦 | Surface chemico-thermal treatment method for mechanical parts and equipment used thereby |
| CN102784974A (en) * | 2012-09-07 | 2012-11-21 | 重庆大江工业有限责任公司 | Method for milling hardened gear surface of spiral bevel gear |
| CN103643200A (en) * | 2013-11-26 | 2014-03-19 | 常熟市东风齿轮厂 | Composite carburization quenching technology for gear |
| CN103726006A (en) * | 2013-12-04 | 2014-04-16 | 大连洁能重工机械有限公司 | Method for controlling heat treatment microdeformation of wind power equipment gear main shaft |
| CN103909390A (en) * | 2014-03-12 | 2014-07-09 | 苏州锻压厂有限责任公司 | Method for fabricating wind-driven generator gear |
-
2014
- 2014-07-24 CN CN201410355063.9A patent/CN104128773A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009052119A (en) * | 2007-08-29 | 2009-03-12 | Ntn Corp | Heat-treatment method for steel, method for producing machine part, and machine part |
| CN102703909A (en) * | 2012-05-24 | 2012-10-03 | 浙江吉利汽车研究院有限公司杭州分公司 | Combined carburizing and quenching process for improving gear performance |
| CN102776470A (en) * | 2012-07-09 | 2012-11-14 | 陈曦 | Surface chemico-thermal treatment method for mechanical parts and equipment used thereby |
| CN102784974A (en) * | 2012-09-07 | 2012-11-21 | 重庆大江工业有限责任公司 | Method for milling hardened gear surface of spiral bevel gear |
| CN103643200A (en) * | 2013-11-26 | 2014-03-19 | 常熟市东风齿轮厂 | Composite carburization quenching technology for gear |
| CN103726006A (en) * | 2013-12-04 | 2014-04-16 | 大连洁能重工机械有限公司 | Method for controlling heat treatment microdeformation of wind power equipment gear main shaft |
| CN103909390A (en) * | 2014-03-12 | 2014-07-09 | 苏州锻压厂有限责任公司 | Method for fabricating wind-driven generator gear |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104357796B (en) | The carburizing quenching process of automobile gear | |
| CN102618817A (en) | Process for machining parts of automobile gear box by using 20CrMnTi steel | |
| CN105643219A (en) | Machining technology for gear shaft | |
| CN105643218A (en) | Machining method of gear parts of gearbox | |
| CN105586599A (en) | Thermal treatment method for carburizing and quenching of gearbox gears | |
| CN105385832A (en) | Surface quenching and tempering combined heat processing technology for aluminum alloy rolling mill work roll | |
| CN104353976B (en) | Pivoting support processing and Technology for Heating Processing | |
| CN104128766A (en) | Gear production process adopting blank casting | |
| CN106544475A (en) | A kind of thinning method of metal material surface crystal grain | |
| CN104562050B (en) | A kind of preparation method of heavy-duty gear | |
| CN103215427A (en) | Heat treatment process of gauge block made of bearing steel | |
| CN106755773B (en) | Softening method for carburized region of CSS-42L gear steel after carburization | |
| CN104128773A (en) | Gear production process beneficial to improving production efficiency | |
| CN104328250A (en) | Heat treatment process of bearing steel | |
| CN104233319A (en) | Method for increasing carburizing and quenching hardness of chrome-nickel steel material | |
| CN104227361A (en) | Gear production technology benefiting production efficiency and surface quality | |
| CN104120378A (en) | Gear production process facilitating gear surface quality | |
| CN104120219A (en) | Gear production process | |
| CN104227363A (en) | Turning tool production steps favorable for martensite formation during heat treatment | |
| CN104195456B (en) | The special steel of a kind of high abrasion bearing and processing technique thereof | |
| CN104117830A (en) | Gear production technology facilitating gear surface quality and segregation degree | |
| CN104117831A (en) | Gear production process favorable for improving machining efficiency and preventing component segregation | |
| CN102653851A (en) | Metal chain surface treatment method | |
| CN104128769A (en) | Gear production technology facilitating uniform composition distribution | |
| CN104894573A (en) | Method for carburizing and quenching of cylindrical gear |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20141105 |
|
| RJ01 | Rejection of invention patent application after publication |