CN106757060A - Gear steel heat treatment process - Google Patents
Gear steel heat treatment process Download PDFInfo
- Publication number
- CN106757060A CN106757060A CN201510830296.4A CN201510830296A CN106757060A CN 106757060 A CN106757060 A CN 106757060A CN 201510830296 A CN201510830296 A CN 201510830296A CN 106757060 A CN106757060 A CN 106757060A
- Authority
- CN
- China
- Prior art keywords
- heat treatment
- treatment process
- steel heat
- gear steel
- gear
- 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.)
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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
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
- Gears, Cams (AREA)
Abstract
The invention discloses a kind of gear steel heat treatment process, comprise the following steps：A, row surface hardening；B, carburizing and quenching；C, surface carburization thermo-chemical treatment；D, carry out it is quenched；E, normalized treatment.A kind of gear steel heat treatment process of the present invention, can be such that tissue surface structure property is improved significantly, will not produce tooth disintegration phenomenon.
Description
Technical field
The present invention relates to a kind of gear steel heat treatment process.
Background technology
In the prior art, in pinion steel heat treatment process, gear can increase hardened layer by carbo-nitriding
Intensity, but due to misoperation, surface layer excessive concentration may be caused, be the carbide for separating out with horn shape or
Netted form is separated out, and tissue surface structure property can be caused seriously to reduce, and easily produces tooth to collapse, and easily
Stress concentration.
The content of the invention
It is an object of the invention to provide a kind of gear steel heat treatment process.
The technical scheme that is used to achieve the above object of the present invention is：A kind of gear steel heat treatment process, bag
Include following steps：A, carry out surface hardening；B, carburizing and quenching；C, surface carburization thermo-chemical treatment；D、
Carry out quenched；E, normalized treatment.
In the step A, after surface hardening, tooth face hardness is generally 40~55HRC.
In the step B, tooth face hardness is up to 56~62HRC after carburizing and quenching.
A kind of gear steel heat treatment process of the present invention, can be such that tissue surface structure property is improved significantly, no
Tooth disintegration phenomenon can be produced.
Specific embodiment
Gear steel heat treatment process, comprises the following steps：A, carry out surface hardening, after surface hardening, the flank of tooth
Hardness is generally 40~55HRC, and feature is antifatigue spot corrosion, antiscuffing capacity high, and wearability is good；Due to
Tooth center portion end is hardened, and gear still has enough toughness, can bear little shock loading；B, carburizing and quenching,
Tooth face hardness is up to 56~62HRC after carburizing and quenching, and tooth center portion still keeps toughness higher, and the gear teeth are held
Curved intensity and contact strength of tooth surface are high, wearability preferably, the important gear drive of the load that is usually used in being hit,
Gear is after carburizing and quenching, and gear tooth deformation is larger, should carry out roll flute；C, surface carburization thermo-chemical treatment, ooze
Need not be carried out after nitrogen other heat treatment, tooth face hardness up to 700~900HV, after Nitrizing Treatment
Gear hardness is high, and technological temperature is low, and deformation is small, therefore suitable for internal gear and is difficult to the gear being ground, and commonly uses
The nitrided steel of the alloying elements such as Yu Hange, copper, lead, such as 38CrMoAlA；D, carry out quenched, quenched place
Tooth face hardness is generally 220~280HBS after reason, and because hardness is not high, gear teeth finishing can be after heat treatment
Carry out；E, normalized treatment, normalizing can eliminate internal stress, and crystal grain thinning improves mechanical property and cutting ability.
Gear steel heat treatment process of the invention, can be such that tissue surface structure property is improved significantly, will not produce
Tooth disintegration phenomenon.
Claims (3)
1. a kind of gear steel heat treatment process, it is characterised in that：Comprise the following steps：
A, carry out surface hardening；B, carburizing and quenching；C, surface carburization thermo-chemical treatment；D, carry out it is quenched；
E, normalized treatment.
2. a kind of gear steel heat treatment process according to claim 1, it is characterised in that：The step A
In, after surface hardening, tooth face hardness is generally 40~55HRC.
3. a kind of gear steel heat treatment process according to claim 1, it is characterised in that：The step B
In, tooth face hardness is up to 56~62HRC after carburizing and quenching.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510830296.4A CN106757060A (en) | 2015-11-25 | 2015-11-25 | Gear steel heat treatment process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510830296.4A CN106757060A (en) | 2015-11-25 | 2015-11-25 | Gear steel heat treatment process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106757060A true CN106757060A (en) | 2017-05-31 |
Family
ID=58963748
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510830296.4A Pending CN106757060A (en) | 2015-11-25 | 2015-11-25 | Gear steel heat treatment process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106757060A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107794532A (en) * | 2017-11-10 | 2018-03-13 | 徐州华瑞机械锻造有限公司 | A kind of heat treatment method of gear |
-
2015
- 2015-11-25 CN CN201510830296.4A patent/CN106757060A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107794532A (en) * | 2017-11-10 | 2018-03-13 | 徐州华瑞机械锻造有限公司 | A kind of heat treatment method of gear |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170531 |