CN108127120A - A kind of powder part heat treatment process - Google Patents
A kind of powder part heat treatment process Download PDFInfo
- Publication number
- CN108127120A CN108127120A CN201711426864.XA CN201711426864A CN108127120A CN 108127120 A CN108127120 A CN 108127120A CN 201711426864 A CN201711426864 A CN 201711426864A CN 108127120 A CN108127120 A CN 108127120A
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- CN
- China
- Prior art keywords
- powder part
- heat treatment
- treatment process
- cooling
- air
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
- B22F2003/248—Thermal after-treatment
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Powder Metallurgy (AREA)
Abstract
A kind of powder part heat treatment process, it is characterised in that：Include the following steps：（1）, preheating, to powder part carry out the pre-heat treatment；（2）, air cooling, in air to powder part natural cooling 0.1 to 1 second；（3）, heating, to powder part be heated to 800 900 DEG C, and kept for 12 seconds；（4）, air cooling, in air to powder part natural cooling 0.5 to 3 second；（5）, cooling, powder part is placed in quenching liquid and is cooled down 4 to 6 seconds.The invention has the advantages that：The powder part heat treatment process of the present invention is based on the improvement on existing equipment and Process ba- sis, has many advantages, such as that simple, easy to operate, qualification rate is high.
Description
Technical field
The present invention relates to technical field of metal heat treatment, and in particular to a kind of powder part heat treatment process.
Background technology
Powder part be it is a kind of by metal powder by high temperature, high pressure compression moulding, then carry out high-frequency quenching etc. science and engineering
Skill carries out the heat treatment of hardness, toughness.Powder part has many advantages, such as high intensity, high rigidity, high-wearing feature, gradually exists at present
Such as the fields such as auto industry replace the metal parts of traditional handicraft, become the development trend of following metal parts.But for
For high frequency heat treatment, processing powder part success rate is at a fairly low.The main reason is that since powder part is passed through with tiny steel grit
Compression moulding although its density is small unlike general casting, is not fully integrated together, this causes in high frequency yet between steel grit
In quenching process, expanded by heating causes steel grit to detach to form crackle.By research, find powder part in high frequency technique, be
Sensed coil was heated to 850-900 DEG C by field generating current within 1.5 seconds under normal temperature state.Quenched cold
But, it generates internal stress and cracks, it is by tiny firm grain that main cause, which is still powder part, through high temperature and pressure extrusion molding, passes through continuous oven
High temperature sintering makes tissue density up to 7 grades or more；Though so but between organizing still having gap, it is also easy to produce and splits in instantaneous high-temperature and cooling
Trace, so being controlled in process quite important.At present, when carrying out high-frequency quenching to powder part using traditional handicraft, occur
The probability of crackle is up to 70% or so, how to reduce its cracked probability, and it is urgently to be resolved hurrily at present to improve product qualification rate
Problem.
Invention content
The technical problems to be solved by the invention are to provide a kind of high powder part heat treatment process of passing rate of processing.
In order to solve the above technical problems, technical solution provided by the invention is：A kind of powder part heat treatment process, feature
It is：Include the following steps：
（1）, preheating, to powder part carry out the pre-heat treatment；
（2）, air cooling, in air to powder part natural cooling 0.1 to 1 second；
（3）, heating, powder part is carried out to be heated to 800-900 DEG C, and kept for 1-2 seconds；
（4）, air cooling, in air to powder part natural cooling 0.5 to 3 second；
（5）, cooling, powder part is placed in quenching liquid and is cooled down 4 to 6 seconds.
Preferably, the step（1）In, 300-500 DEG C is preheating to the powder part.
Preferably, the step（1）In, it is 0.6 second to the powder part preheating time.
Preferably, the step（4）In, to the powder part natural cooling 1 second.
Preferably, the step（5）In, the powder part is cooled down 5 seconds in quenching liquid.
The invention has the advantages that：The powder part heat treatment process of the present invention is based on existing equipment and Process ba- sis
On improvement, have many advantages, such as that simple, easy to operate, qualification rate is high.
Specific embodiment
Embodiment one
A kind of powder part heat treatment process, it is characterised in that：Include the following steps：
（1）, preheating, output power reduce with 50% first carries out preheating action improve instant heating situation, to powder in High-frequency machine
Part carries out the pre-heat treatment, it is made to be heated to 300~500 DEG C；By comparing repeatedly, under the conditions of other same, at 300~500 DEG C
In section, powder part crackle occurrence probability is minimum when being preheating to 350 DEG C；2）Air cooling, High-frequency machine stop heating so that
Powder part natural cooling 1 to 5 second in air so that the temperature difference of powder part internal and external parts reduces；Powder part internal and external parts exists
The temperature difference is the basic reason for causing powder part cracked in heat treatment process；By experimental comparison, natural cooling 0.5 second is i.e.
Preferable effect is can reach, cooling time, too short-range missile caused the temperature difference to reduce unobvious, and cooling time is long, leads to preheating temperature not
It is enough, waste of energy；It is air-cooled its temperature to be allowed to expand to interior tissue make inside and outside fall range contracting；
（2）, air cooling, in air to powder part natural cooling 0.1 to 1 second；
（3）, heating, powder part is carried out to be heated to 800-900 DEG C, and kept for 1-2 seconds；
（4）, air cooling, in air to powder part natural cooling 0.5 to 3 second；
（5）, cooling, powder part is placed in quenching liquid and is cooled down 4 to 6 seconds.
The step（1）In, 300-500 DEG C is preheating to the powder part.
The step（1）In, it is 0.6 second to the powder part preheating time.
The step（4）In, to the powder part natural cooling 1 second.
The step（5）In, the powder part is cooled down 5 seconds in quenching liquid.
Changed by process above, make the reduction of slight crack ratio, and gold is as tissue is also because process reform makes tissue become thinner
It causes and uniform, and still can obtain high rigidity and high intensity
In order to become apparent from, completely illustrate present disclosure, specific embodiment is provided below to illustrate present inventive concept.When
So, the design that embodiment is intended to illustrate invention is provided, is not the whole of designing scheme of the present invention, should less regard
Limitation for design content of the present invention.Under the enlightenment of the embodiment provided, made any scheme belongs to this hair
Bright protection domain.
Claims (5)
1. a kind of powder part heat treatment process, it is characterised in that：Include the following steps：
（1）, preheating, to powder part carry out the pre-heat treatment；
（2）, air cooling, in air to powder part natural cooling 0.1 to 1 second；
（3）, heating, powder part is carried out to be heated to 800-900 DEG C, and kept for 1-2 seconds；
（4）, air cooling, in air to powder part natural cooling 0.5 to 3 second；
（5）, cooling, powder part is placed in quenching liquid and is cooled down 4 to 6 seconds.
2. a kind of powder part heat treatment process according to claim 1, it is characterised in that：The step（1）In, to described
Powder part is preheating to 300-500 DEG C.
3. a kind of powder part heat treatment process according to claim 1, it is characterised in that：The step（1）In, to described
Powder part preheating time is 0.6 second.
4. a kind of powder part heat treatment process according to claim 1, it is characterised in that：The step（4）In, to described
Powder part natural cooling 1 second.
5. a kind of powder part heat treatment process according to claim 1, it is characterised in that：The step（5）In, to described
Powder part cools down 5 seconds in quenching liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711426864.XA CN108127120A (en) | 2017-12-26 | 2017-12-26 | A kind of powder part heat treatment process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711426864.XA CN108127120A (en) | 2017-12-26 | 2017-12-26 | A kind of powder part heat treatment process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108127120A true CN108127120A (en) | 2018-06-08 |
Family
ID=62392920
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711426864.XA Pending CN108127120A (en) | 2017-12-26 | 2017-12-26 | A kind of powder part heat treatment process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108127120A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113073180A (en) * | 2021-03-24 | 2021-07-06 | 鑫光热处理工业(昆山)有限公司 | Heat treatment processing technology for powder part |
-
2017
- 2017-12-26 CN CN201711426864.XA patent/CN108127120A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113073180A (en) * | 2021-03-24 | 2021-07-06 | 鑫光热处理工业(昆山)有限公司 | Heat treatment processing technology for powder part |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180608 |