CN108570640A - A kind of pin local carburzing method - Google Patents
A kind of pin local carburzing method Download PDFInfo
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- CN108570640A CN108570640A CN201810529746.XA CN201810529746A CN108570640A CN 108570640 A CN108570640 A CN 108570640A CN 201810529746 A CN201810529746 A CN 201810529746A CN 108570640 A CN108570640 A CN 108570640A
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- hardness
- carburizing
- heating temperature
- soaking time
- depth
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000010438 heat treatment Methods 0.000 claims abstract description 30
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229910052802 copper Inorganic materials 0.000 claims abstract description 22
- 239000010949 copper Substances 0.000 claims abstract description 22
- 238000005255 carburizing Methods 0.000 claims abstract description 19
- 238000005496 tempering Methods 0.000 claims abstract description 12
- 230000008595 infiltration Effects 0.000 claims abstract description 9
- 238000001764 infiltration Methods 0.000 claims abstract description 9
- 238000010791 quenching Methods 0.000 claims abstract description 8
- 230000000171 quenching effect Effects 0.000 claims abstract description 5
- 238000000227 grinding Methods 0.000 claims abstract description 4
- 238000002791 soaking Methods 0.000 claims description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 11
- 229910052799 carbon Inorganic materials 0.000 claims description 11
- 150000003839 salts Chemical class 0.000 claims description 9
- 230000035515 penetration Effects 0.000 claims description 7
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 6
- 238000007689 inspection Methods 0.000 claims description 6
- 238000004321 preservation Methods 0.000 claims description 3
- 239000011780 sodium chloride Substances 0.000 claims description 3
- 238000007514 turning Methods 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 abstract description 2
- 238000000576 coating method Methods 0.000 abstract description 2
- 238000009792 diffusion process Methods 0.000 abstract description 2
- 239000007769 metal material Substances 0.000 abstract description 2
- 230000008520 organization Effects 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000002344 surface layer Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
- C21D1/28—Normalising
-
- 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
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
-
- 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
- C23C8/04—Treatment of selected surface areas, e.g. using masks
-
- 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
-
- 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
Abstract
The invention belongs to metal material Field of Heat-treatment, provide a kind of pin local carburzing method, including：Part roughing；Part entirety copper facing is protected；Vehicle cemented zone removes cemented zone copper plate；Carburizing is carried out using two sections of acierations；High tempering, and check hardness after infiltration layer high tempering；Remove copper plate；After normalizing, quenching, tempering heating, infiltration layer microscopic structure is checked；It is tempered after grinding outer circle to final size.Then method that the present invention removes carburized zone coating using the copper facing of part entirety protects non-carburizing face；Cold and hot working procedure arrangement is reasonable, interts between each process segment and arranges heat treatment procedure, while ensureing product processing quality, obtains required diffusion layer organization, can be widely popularized during the carburization process of such product.
Description
Technical field
The invention belongs to metal material Field of Heat-treatment, are related to a kind of small-sized pin local carburzing process.
Background technology
To improve the phosphorus content on part surface layer and forming certain carbon content gradient wherein, low-carbon steel part is placed on richness
It is heated in the medium of carbon atmosphere, keeps the temperature the regular hour, it is carburizing so that active atoms of carbon is penetrated into the technique of piece surface.It oozes
To improve surface and core structure, surface layer be tempered martensite by quenching and be tempered for part after carbon, improves case hardness and resistance to
Mill property enhances fatigue strength；Center portion has enough toughness and plasticity, meets the needs of part time job process.
It is as shown in Figure 1 pin class part of the present invention, the part both ends carburizing, the intermediate not permeable carbon in position belongs to
Local carburzing part needs to take seepage control measure to non-surface of oozing before carburization.Since part carburizing rear surface hardness is very high, no
Conducive to machining, in layout technological process, to be convenient for arranging necessary heat treatment procedure between each process segment, send out
Ensure product processing quality while waving thermal processes act.In the actual production process, if seepage control measure, technological process do not conform to
Reason, will cause waste of time or even part rejection.
Invention content
In view of the problems of the existing technology, the object of the present invention is to provide a kind of pin class parts locally carburization process sides
Method can effectively improve the production efficiency of part needed for acquisition while infiltration layer, reduce the appearance of waste product, reduce production cost.
In order to achieve the above object, the technical solution adopted by the present invention is：
A kind of pin local carburzing method, includes the following steps：
1) part roughing：Face work, turning.
2) copper facing：Part entirety copper facing is protected.
3) part semifinishing：Vehicle cemented zone removes cemented zone copper plate.
4) carburizing：Using two sections of acierations.First segment carburizing heating temperature is 880 DEG C~950 DEG C, and carbon potential is set as
1.2%；Second segment carburizing heating temperature is 880 DEG C~950 DEG C, and carbon potential is set as 0.8%.Determine that carburizing is protected according to depth of penetration
The warm time.Depth of penetration inspection：Deep layer depth, depth of penetration required value 0.45mm~0.75mm are checked using microscopic structure method.
5) high tempering：Heating temperature is 640 DEG C~660 DEG C, and soaking time is 3h~6h, is air-cooled to room temperature.Infiltration layer is hard
Degree checks：Hardness after inspection carburized layer high tempering.
6) copper removal：Remove copper plate.
7) normalizing, quenching, tempering heating：
7.1) normalizing：Heating temperature is 880 DEG C~920 DEG C, and soaking time is 7min~10min, air cooling.
7.2) grade quench：7min~10min is kept the temperature in 780 DEG C~820 DEG C of salt bath furnace, is transferred to 160 DEG C~280
DEG C salt made from earth containing a comparatively high percentage of sodium chloride in heat preservation 3min~8min after it is air-cooled.
7.3) it cleans：Remove remaining salt on part.
7.4) dry：100 DEG C~150 DEG C of heating temperature, soaking time >=30min.
7.5) it is tempered：150 DEG C~170 DEG C, soaking time 2h~4h of heating temperature, air cooling.
7.6) hardness test：Check piece surface hardness and centre hardness, it is desirable that piece surface hardness 58HRC~62HRC；
Centre hardness 32HRC~42HRC.
7.7) infiltration layer microscopic examination：Carburized structure should meet HB5492.
8) it finishes：Outer circle is ground to final size.
9) it is tempered after grinding：140 DEG C ± 10 DEG C of heating temperature, soaking time >=3h.
Beneficial effects of the present invention：Then the present invention removes the method for carburized zone coating using the copper facing of part entirety to non-
It is protected in carburizing face.Cold and hot working procedure arrangement is reasonable, interts between each process segment and arranges heat treatment procedure, ensures production
While product processing quality, required diffusion layer organization is obtained.It can be widely popularized during the carburization process of such product.
Description of the drawings
Fig. 1 pin class part schematic diagrames；
Fig. 2 pin roughing schematic diagrames；
Protect schematic diagram in the non-carburizing face of Fig. 3 pins.
In figure：1 cemented zone；2 copper facing protection zones.
Specific implementation mode
Below in conjunction with specific embodiment, the present invention will be further described.
12CrNi3A pins surface layer carburizing 0.4mm~0.7mm, comprises the following steps that：
1) part roughing：Face work, turning, as shown in Figure 2.
2) copper facing：Part entirety copper facing is protected
3) part semifinishing：Vehicle cemented zone removes the copper plate of cemented zone 1, retains copper facing protection zone 2, such as Fig. 3 institutes
Show.
4) carburizing：Using two sections of acierations.910 DEG C of first segment carburizing heating temperature, carbon potential are set as 1.2%, when heat preservation
Between 1h；Second segment carburizing heating temperature is 910 DEG C, and carbon potential is set as 0.8%, keeps the temperature 2h.Depth of penetration inspection：Using micro- group
Weave checks deep layer depth, carburized (case) depth required value 0.45mm~0.75mm.
5) high tempering：Heating temperature is 650 DEG C, and soaking time 4h is air-cooled to room temperature.Nitrided layer hardness inspection：It checks
Hardness after infiltration layer high tempering, case hardness required value≤62HRA or≤23.5HRC.
6) copper removal：Copper plate is removed.
7) normalizing, quenching, tempering heating：
7.1) normalizing：Heating temperature is 910 DEG C, soaking time 8min, air cooling.
7.2) grade quench：8min is kept the temperature in 800 DEG C of salt bath furnace, is transferred in 230 DEG C of salt made from earth containing a comparatively high percentage of sodium chloride and keeps the temperature 5min, so
It is air-cooled afterwards.
7.3) it cleans：It is cleaned with cleaning machine hot water, remaining salt on part is cleaned up.
7.4) dry：120 DEG C of heating temperature, soaking time 40min.
7.5) it is tempered：160 DEG C, soaking time 3h of heating temperature, air cooling.
7.6) hardness test：Check piece surface hardness 58HRC~62HRC；Centre hardness 32HRC~42HRC.
7.7) infiltration layer microscopic examination：Carburized structure should meet HB5492.
8) it finishes：Outer circle is ground to final size.
9) it is tempered after grinding：140 DEG C ± 10 DEG C of heating temperature, soaking time 3.5h.
Embodiments of the present invention above described embodiment only expresses, but therefore can not be interpreted as special to the present invention
The limitation of the range of profit, it is noted that for those skilled in the art, without departing from the inventive concept of the premise,
Various modifications and improvements can be made, these are all belonged to the scope of protection of the present invention.
Claims (1)
1. a kind of pin local carburzing method, it is characterised in that following steps：
1) part roughing：Face work, turning；
2) copper facing：Part entirety copper facing is protected；
3) part semifinishing：Vehicle cemented zone removes cemented zone copper plate；
4) carburizing：Using two sections of acierations；First segment carburizing heating temperature is 880 DEG C~950 DEG C, and carbon potential is set as 1.2%；The
Two sections of carburizing heating temperatures are 880 DEG C~950 DEG C, and carbon potential is set as 0.8%；Carburizing soaking time is determined according to depth of penetration；
Depth of penetration inspection：Check that deep layer depth, depth of penetration required value are 0.45mm~0.75mm using microscopic structure method；
5) high tempering：Heating temperature is 640 DEG C~660 DEG C, and soaking time is 3h~6h, is air-cooled to room temperature；Nitrided layer hardness is examined
It looks into：Hardness after inspection infiltration layer high tempering；
6) copper removal：Remove copper plate；
7) normalizing, quenching, tempering heating：
7.1) normalizing：Heating temperature is 880 DEG C~920 DEG C, and soaking time is 7min~10min, air cooling；
7.2) grade quench：7min~10min is kept the temperature in 780 DEG C~820 DEG C of salt bath furnace, is transferred to 160 DEG C~280 DEG C
It is air-cooled after heat preservation 3min~8min in salt made from earth containing a comparatively high percentage of sodium chloride；
7.3) it cleans：Remove remaining salt on part；
7.4) dry：100 DEG C~150 DEG C of heating temperature, soaking time >=30min；
7.5) it is tempered：150 DEG C~170 DEG C, soaking time 2h~4h of heating temperature, air cooling；
7.6) hardness test：Check piece surface hardness and centre hardness, it is desirable that piece surface hardness 58HRC~62HRC；Center portion
Hardness 32HRC~42HRC；
7.7) infiltration layer microscopic examination：Carburized structure should meet HB5492；
8) it finishes：Outer circle is ground to final size；
9) it is tempered after grinding：140 DEG C ± 10 DEG C of heating temperature, soaking time >=3h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810529746.XA CN108570640A (en) | 2018-05-29 | 2018-05-29 | A kind of pin local carburzing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810529746.XA CN108570640A (en) | 2018-05-29 | 2018-05-29 | A kind of pin local carburzing method |
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| Publication Number | Publication Date |
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| CN108570640A true CN108570640A (en) | 2018-09-25 |
Family
ID=63572995
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| CN201810529746.XA Pending CN108570640A (en) | 2018-05-29 | 2018-05-29 | A kind of pin local carburzing method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110484857A (en) * | 2019-09-28 | 2019-11-22 | 贵州航天精工制造有限公司 | A kind of process improving eccentric bush performance |
| CN111218639A (en) * | 2019-06-25 | 2020-06-02 | 贵州航天精工制造有限公司 | Technological method for improving mechanical property of certain type nut |
| CN111647843A (en) * | 2020-06-17 | 2020-09-11 | 北华航天工业学院 | Composite heat treatment process for manufacturing hollow brick mold by using plate |
| CN111826604A (en) * | 2020-07-15 | 2020-10-27 | 湖南南方宇航高精传动有限公司 | Method for performing differential deep carburization on different parts of same part |
| CN111945105A (en) * | 2020-08-17 | 2020-11-17 | 沈阳飞机工业（集团）有限公司 | Vacuum heat treatment method for improving stainless steel nitriding layer structure |
| CN115261771A (en) * | 2022-07-26 | 2022-11-01 | 中国航发哈尔滨轴承有限公司 | Ion nitriding seepage-proofing method for steel bearing ring of high-temperature carburized bearing |
| CN115283945A (en) * | 2022-07-19 | 2022-11-04 | 陕西法士特齿轮有限责任公司 | High-hardness synchronizer riveting locking pin and machining method thereof |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111218639A (en) * | 2019-06-25 | 2020-06-02 | 贵州航天精工制造有限公司 | Technological method for improving mechanical property of certain type nut |
| CN110484857A (en) * | 2019-09-28 | 2019-11-22 | 贵州航天精工制造有限公司 | A kind of process improving eccentric bush performance |
| CN111647843A (en) * | 2020-06-17 | 2020-09-11 | 北华航天工业学院 | Composite heat treatment process for manufacturing hollow brick mold by using plate |
| CN111826604A (en) * | 2020-07-15 | 2020-10-27 | 湖南南方宇航高精传动有限公司 | Method for performing differential deep carburization on different parts of same part |
| CN111826604B (en) * | 2020-07-15 | 2022-03-01 | 湖南南方宇航高精传动有限公司 | Method for performing differential deep carburization on different parts of same part |
| CN111945105A (en) * | 2020-08-17 | 2020-11-17 | 沈阳飞机工业（集团）有限公司 | Vacuum heat treatment method for improving stainless steel nitriding layer structure |
| CN115283945A (en) * | 2022-07-19 | 2022-11-04 | 陕西法士特齿轮有限责任公司 | High-hardness synchronizer riveting locking pin and machining method thereof |
| CN115283945B (en) * | 2022-07-19 | 2024-04-09 | 陕西法士特齿轮有限责任公司 | High-hardness synchronizer riveting locking pin and processing method thereof |
| CN115261771A (en) * | 2022-07-26 | 2022-11-01 | 中国航发哈尔滨轴承有限公司 | Ion nitriding seepage-proofing method for steel bearing ring of high-temperature carburized bearing |
| CN115261771B (en) * | 2022-07-26 | 2024-04-16 | 中国航发哈尔滨轴承有限公司 | Ion nitriding seepage-proofing method for high-temperature carburized bearing steel bearing ring |
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