CN109355617A - A kind of 30Cr2Ni2WVA nitriding method - Google Patents
A kind of 30Cr2Ni2WVA nitriding method Download PDFInfo
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- CN109355617A CN109355617A CN201811428105.1A CN201811428105A CN109355617A CN 109355617 A CN109355617 A CN 109355617A CN 201811428105 A CN201811428105 A CN 201811428105A CN 109355617 A CN109355617 A CN 109355617A
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- Prior art keywords
- nitriding
- treatment
- temperature
- cooling
- requirement
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Classifications
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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
- C23C8/24—Nitriding
- C23C8/26—Nitriding 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
- C21D1/25—Hardening, combined with annealing between 300 degrees Celsius and 600 degrees Celsius, i.e. heat refining ("Vergüten")
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
The invention discloses a kind of 30Cr2Ni2WVA nitriding methods, according to the material property of 30Cr2Ni2WVA and nitriding quality requirement, meet the core rigidities requirement of part by part modifier treatment before nitriding, Finishing Parts Machining meets size requirement before nitriding, nitrided surface carries out phosphorating treatment, is then heated up in well formula nitriding furnace, keeps the temperature (nitriding), is cooling.It finally tests to nitriding quality, reaches part nitrided case depth, nitriding surface hardness is met the requirements.
Description
Technical field
The invention belongs to technical field of heat treatment, are related to the nitriding method of 30Cr2Ni2WVA material.
Background technique
30Cr2Ni2WVA belongs to aviation steel forgings material, is a kind of high-quality structural steel.In " the aeronautic structure grade of steel of HB/Z 79
Stainless steel nitriding specification " in do not provide the nitriding of 30Cr2Ni2WVA material with reference to technological parameter.There is this on certain type machine
Material parts need to carry out surface carburization processing, and require nitrided case depth 0.5mm~0.7mm, nitriding surface hardness HR15N >=87,
Core rigidities HRC=35.5~41.5.
Summary of the invention
The present invention is intended to provide a kind of 30Cr2Ni2WVA nitriding method, meets nitrided case depth 0.5mm~0.7mm, nitriding
Surface hardness HR15N >=87, the nitriding quality requirement of core rigidities HRC=35.5~41.5.
According to the material property of 30Cr2Ni2WVA and nitriding quality requirement, reasonable arrangement of the present invention handles route, passes through
Part modifier treatment meets the core rigidities requirement of part before nitriding, and Finishing Parts Machining meets size requirement before nitriding, nitriding table
Face carries out phosphorating treatment, is then heated up in well formula nitriding furnace, keeps the temperature (nitriding), is cooling.Finally nitriding quality is carried out
It examines, reaches part nitrided case depth, nitriding surface hardness is met the requirements.
The present invention is achieved by following technical solution:
A kind of 30Cr2Ni2WVA nitriding method, modifier treatment and Nitrizing Treatment including part material；
Hardening heat in the modifier treatment is 900 ± 10 DEG C, and tempering temperature is 610 ± 20 DEG C；
The Nitrizing Treatment includes heating, heat preservation and cooling；
The heating is heated up under ammonia flow, and temperature is finally promoted to 540 ± 10 DEG C by 3~5h of heating-up time；
The heat preservation is to keep the temperature 40~50h under conditions of guaranteeing ammonia dissociation rate control 35%~50%；
The cooling is air-cooled after being cooled to≤150 DEG C under ammonia flow.
Part woollen is machined to predetermined size after the modifier treatment.
The part woollen is machined to predetermined size, nitrided surface phosphorating treatment, the non-tin plating protection in nitriding face.
The present invention provides a kind of 30Cr2Ni2WVA nitriding methods, without the existing parameter that can refer in navigation mark, propose
The nitriding method that can be used for 30Cr2Ni2WVA material nitriding, meets the needs of certain type machine production task, and provides
The reference method of 30Cr2Ni2WVA material nitriding, and this method is safe and reliable, reproducible, energy conservation and environmental protection, pollution-free, efficiency
It is high.
Detailed description of the invention
Fig. 1 is 30Cr2Ni2WVA material nitridation process route map.
Specific embodiment
Technical solution of the present invention is described further below in conjunction with attached drawing, but required protection scope does not limit to
In described；
By taking the part of 30Cr2Ni2WVA material processing as an example, in order to obtain (0.5~0.7) mm depth, surface hardness
HR15N >=87, and core rigidities HRC=35.5~41.5, as shown in Figure 1, this method includes successively carrying out using following methods
Woollen blanking, modifier treatment, machining, phosphorating treatment, nitriding and inspection, detailed process be as follows:
1, woollen modifier treatment: quenching: (900 ± 10) DEG C, tempering: (610 ± 20) DEG C, hardening media presses HB/Z when quenched
136 require to be oily, and tempering time is calculated by 136 prescriptive procedure of HB/Z when quenched, and tempering time is true according to part effective thickness
It is fixed.
2, guarantee part size by machine overstriking processing, finishing.
3, part nitrided surface phosphorating treatment, the non-tin plating protection in nitriding face.
4, part shove charge.
5, nitriding:
(1) heat up: (3~5) h is warming up to (540 ± 10) DEG C under ammonia flow.
(2) it keeps the temperature: adjusting ammonia flow (ammonia flow requires ammonia dissociation rate during guaranteeing to meet the requirements), guarantee ammonia point
The control of solution rate keeps the temperature 40h~50h 35%~50%.
(3) cooling: outlet is air-cooled after being cooled to≤150 DEG C under ammonia flow, and ammonia purity is to meet the requirement of GB 536, pure
Degree >=99.99%.
6, nitrided case depth, nitriding surface hardness, core rigidities, nitriding covering weave is carried out to part to examine.
Claims (3)
1. a kind of 30Cr2Ni2WVA nitriding method, it is characterised in that: modifier treatment and Nitrizing Treatment including part material；
Hardening heat in the modifier treatment is 900 ± 10 DEG C, and tempering temperature is 610 ± 20 DEG C；
The Nitrizing Treatment includes heating, heat preservation and cooling；
The heating is heated up under ammonia flow, and temperature is finally promoted to 540 ± 10 DEG C by 3~5h of heating-up time；
The heat preservation is to keep the temperature 40~50h under conditions of guaranteeing ammonia dissociation rate control 35%~50%；
The cooling is air-cooled after being cooled to≤150 DEG C under ammonia flow.
2. a kind of 30Cr2Ni2WVA nitriding method according to claim 1, it is characterised in that: will after the modifier treatment
Part woollen is machined to predetermined size.
3. a kind of 30Cr2Ni2WVA nitriding method according to claim 2, it is characterised in that: the part woollen machine adds
After work to predetermined size, nitrided surface phosphorating treatment, the non-tin plating protection in nitriding face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811428105.1A CN109355617A (en) | 2018-11-27 | 2018-11-27 | A kind of 30Cr2Ni2WVA nitriding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811428105.1A CN109355617A (en) | 2018-11-27 | 2018-11-27 | A kind of 30Cr2Ni2WVA nitriding method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109355617A true CN109355617A (en) | 2019-02-19 |
Family
ID=65342961
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811428105.1A Pending CN109355617A (en) | 2018-11-27 | 2018-11-27 | A kind of 30Cr2Ni2WVA nitriding method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109355617A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112442650A (en) * | 2020-11-11 | 2021-03-05 | 中国航发中传机械有限公司 | Method for accurately controlling surface hardness, roughness and white layer depth of nitrided gear of engine |
Citations (5)
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|---|---|---|---|---|
| CN1858287A (en) * | 2006-02-17 | 2006-11-08 | 沪东重机股份有限公司 | Moving part pin of diesel engine and its producing method |
| CN102534392A (en) * | 2012-02-16 | 2012-07-04 | 无锡市万邦机械制造厂 | Processing, formation and manufacturing method of piston rod using 38CrMoAlA steel as materials |
| JP2013007065A (en) * | 2011-06-22 | 2013-01-10 | Toyota Motor Corp | Nitriding-quenching method |
| CN106342097B (en) * | 2011-01-04 | 2014-02-12 | 哈尔滨东安发动机（集团）有限公司 | 32Cr3MoVE material deep layer nitriding method |
| CN107779810A (en) * | 2017-12-24 | 2018-03-09 | 中国航发贵州红林航空动力控制科技有限公司 | A kind of 4Cr14Ni14W2The technique of Mo heat resisting steel rapid ion nitridings |
-
2018
- 2018-11-27 CN CN201811428105.1A patent/CN109355617A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1858287A (en) * | 2006-02-17 | 2006-11-08 | 沪东重机股份有限公司 | Moving part pin of diesel engine and its producing method |
| CN106342097B (en) * | 2011-01-04 | 2014-02-12 | 哈尔滨东安发动机（集团）有限公司 | 32Cr3MoVE material deep layer nitriding method |
| JP2013007065A (en) * | 2011-06-22 | 2013-01-10 | Toyota Motor Corp | Nitriding-quenching method |
| CN102534392A (en) * | 2012-02-16 | 2012-07-04 | 无锡市万邦机械制造厂 | Processing, formation and manufacturing method of piston rod using 38CrMoAlA steel as materials |
| CN107779810A (en) * | 2017-12-24 | 2018-03-09 | 中国航发贵州红林航空动力控制科技有限公司 | A kind of 4Cr14Ni14W2The technique of Mo heat resisting steel rapid ion nitridings |
Non-Patent Citations (1)
| Title |
|---|
| 国营彤辉机械厂: "《检验手册 内部资料》", 31 March 1976 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112442650A (en) * | 2020-11-11 | 2021-03-05 | 中国航发中传机械有限公司 | Method for accurately controlling surface hardness, roughness and white layer depth of nitrided gear of engine |
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