CN107794349A - A kind of high temperature process for quenching of iron - Google Patents
A kind of high temperature process for quenching of iron Download PDFInfo
- Publication number
- CN107794349A CN107794349A CN201711416672.0A CN201711416672A CN107794349A CN 107794349 A CN107794349 A CN 107794349A CN 201711416672 A CN201711416672 A CN 201711416672A CN 107794349 A CN107794349 A CN 107794349A
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- China
- Prior art keywords
- iron
- carbon alloy
- cooled
- quenching
- high temperature
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- 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
- C21D6/00—Heat treatment of ferrous alloys
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/008—Martensite
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
A kind of high temperature process for quenching of iron, comprises the following steps：1）：Iron-carbon alloy is heated, is heated to austenitizing temperature section, is incubated 24 hours；2）：First time cooling is carried out, by the iron-carbon alloy after insulation, untill its surface temperature is cooled into less than 800 DEG C and temperature more than Ms points with cold water；3）：Carry out second to cool down, iron-carbon alloy was cooled to 500 600 DEG C in 30 minutes with air-cooled during cooling；4）：First time cooling step is repeated, the surface temperature of iron-carbon alloy is cooled to 300 400 DEG C, then stands 15 20 minutes；5）：By the iron-carbon alloy after standing, rinsed with current, washing time is 2 hours 1 hour, is then carried out again air-cooled 30 minutes.Beneficial effects of the present invention：Enable in particular to improve the surface toughness of iron-carbon alloy, there is preferable martensitic structure, do not ftracture.
Description
Technical field
Quenched the present invention relates to steel and refine technical field, the high temperature process for quenching of specifically a kind of iron.
Background technology
At present, the more conventional quenching mode in China has water quenching and oil quenching, but for the preferable iron-carbon alloy of quenching degree
For should not whole process take water quenching because water has stronger cooling capacity, direct quenching, in the cold of martensite transformation temperature area
Speed is too big, and in structural stress and the double action of thermal stress, internal stress increased dramatically, and makes part that gross distortion occur or even ftracture
；Also oil quenching should not be used, because oil quenching cooling velocity is small, through hardening diameter is small, and large-scale workpiece is not easy through hardening.
At present, there has been no a kind of simply and easily quenching cooling technique can make iron-carbon alloy obtain good martensite group.
Usually said quenching is that steel is heated to more than critical-temperature, held for some time, then with cold more than critical
But speed is cooled down, so as to obtain the unbalance microstructure based on martensite（Also it is with good grounds to need to obtain bainite or holding
Single phase austenite）A kind of heat-treatment technology method.Quenching is the work post technique side being most widely used in steel heat treatment process
Method.
The content of the invention
It is an object of the present invention to propose a kind of high temperature process for quenching of iron so that iron-carbon alloy obtains good geneva
Body group.
In order to solve the deficiency in above-mentioned technology, technical scheme provided by the invention is：
A kind of high temperature process for quenching of iron, comprises the following steps：
1）：Iron-carbon alloy is heated, is heated to austenitizing temperature section, is incubated 2-4 hours；
2）：First time cooling is carried out, by the iron-carbon alloy after insulation, its surface temperature is cooled to less than 800 DEG C with cold water
And untill the temperature more than Ms points；
3）：Carry out second to cool down, iron-carbon alloy in 30 minutes was cooled to 500-600 DEG C with air-cooled during cooling；
4）：First time cooling step is repeated, the surface temperature of iron-carbon alloy is cooled to 300-400 DEG C, then stands 15-20 points
Clock；
5）：By the iron-carbon alloy after standing, rinsed with current, washing time is -2 hours 1 hour, then carries out air-cooled 30 again
Minute.
Further, the step 2）The temperature of middle cold water is 1-2 °.
Further, the step 3）The colod-application large blower of apoplexy is blowed.
Further, the step 4）During standing, can first it be dried with large blower 1-2 minutes.
Further, the step 5）The continuous flow of current is 35L/min-38L/min.
Beneficial effects of the present invention：By the process for quenching of the iron-carbon alloy of the present invention, enable in particular to improve iron-carbon alloy
Surface toughness, there is preferable martensitic structure, workpiece does not ftracture.
Embodiment
In order that present disclosure is easier to be clearly understood, below by the technical scheme in the embodiment of the present invention
It is clearly and completely described.
A kind of embodiment 1, the high temperature process for quenching of iron, comprises the following steps：
1）：Iron-carbon alloy is heated, is heated to austenitizing temperature section, is incubated 2 hours；
2）：First time cooling is carried out, by the iron-carbon alloy after insulation, its surface temperature is cooled to less than 800 DEG C with cold water
And untill the temperature more than Ms points；
3）：Carry out second to cool down, iron-carbon alloy was cooled to 500 DEG C in 30 minutes with air-cooled during cooling；
4）：First time cooling step is repeated, the surface temperature of iron-carbon alloy is cooled to 300 DEG C, then stands 15 minutes；
5）：By the iron-carbon alloy after standing, rinsed with current, washing time is 1 hour, is then carried out again air-cooled 30 minutes.
A kind of optimal technical scheme of the present embodiment, the step 2）The temperature of middle cold water is 1 °.
A kind of optimal technical scheme of the present embodiment, the step 3）The colod-application large blower of apoplexy is blowed.
A kind of optimal technical scheme of the present embodiment, the step 4）During standing, can first it be blown with large blower
Wind 0.5 minute.
A kind of optimal technical scheme of the present embodiment, the step 5）The continuous flow of current is 35L/min.
A kind of embodiment 2, the high temperature process for quenching of iron, comprises the following steps：
1）：Iron-carbon alloy is heated, is heated to austenitizing temperature section, is incubated 3 hours；
2）：First time cooling is carried out, by the iron-carbon alloy after insulation, its surface temperature is cooled to less than 800 DEG C with cold water
And untill the temperature more than Ms points；
3）：Carry out second to cool down, iron-carbon alloy was cooled to 550 DEG C in 30 minutes with air-cooled during cooling；
4）：First time cooling step is repeated, the surface temperature of iron-carbon alloy is cooled to 350 DEG C, then stands 17 minutes；
5）：By the iron-carbon alloy after standing, rinsed with current, washing time is 1.5 hours, then carries out air-cooled 30 points again
Clock.
A kind of optimal technical scheme of the present embodiment, the step 2）The temperature of middle cold water is 1.5 °.
A kind of optimal technical scheme of the present embodiment, the step 3）The colod-application large blower of apoplexy is blowed.
A kind of optimal technical scheme of the present embodiment, the step 4）During standing, can first it be blown with large blower
Wind 1.5 minutes.
A kind of optimal technical scheme of the present embodiment, the step 5）The continuous flow of current is 36.5L/min.
A kind of embodiment 3, the high temperature process for quenching of iron, comprises the following steps：
1）：Iron-carbon alloy is heated, is heated to austenitizing temperature section, is incubated 4 hours；
2）：First time cooling is carried out, by the iron-carbon alloy after insulation, its surface temperature is cooled to less than 800 DEG C with cold water
And untill the temperature more than Ms points；
3）：Carry out second to cool down, iron-carbon alloy was cooled to 600 DEG C in 30 minutes with air-cooled during cooling；
4）：First time cooling step is repeated, the surface temperature of iron-carbon alloy is cooled to 400 DEG C, then stands 20 minutes；
5）：By the iron-carbon alloy after standing, rinsed with current, washing time is 2 hours, is then carried out again air-cooled 30 minutes.
A kind of optimal technical scheme of the present embodiment, the step 2）The temperature of middle cold water is 2 °.
A kind of optimal technical scheme of the present embodiment, the step 3）The colod-application large blower of apoplexy is blowed.
A kind of optimal technical scheme of the present embodiment, the step 4）During standing, can first it be blown with large blower
Wind 2 minutes.
A kind of optimal technical scheme of the present embodiment, the step 5）The continuous flow of current is 38L/min.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of changes, modification can be carried out to these embodiments in the case where not departing from the principle and structure of the present invention, replace by understanding
And modification, the scope of the present invention are limited by appended claims and its equivalency range.
Claims (5)
1. the high temperature process for quenching of a kind of iron, it is characterised in that comprise the following steps：
1）：Iron-carbon alloy is heated, is heated to austenitizing temperature section, is incubated 2-4 hours；
2）：First time cooling is carried out, by the iron-carbon alloy after insulation, its surface temperature is cooled to less than 800 DEG C with cold water
And untill the temperature more than Ms points；
3）：Carry out second to cool down, iron-carbon alloy in 30 minutes was cooled to 500-600 DEG C with air-cooled during cooling；
4）：First time cooling step is repeated, the surface temperature of iron-carbon alloy is cooled to 300-400 DEG C, then stands 15-20 points
Clock；
5）：By the iron-carbon alloy after standing, rinsed with current, washing time is -2 hours 1 hour, then carries out air-cooled 30 again
Minute.
A kind of 2. high temperature process for quenching of iron according to power claim 1, it is characterised in that the step 2）Middle cold water
Temperature is 1-2 °.
A kind of 3. high temperature process for quenching of iron according to power claim 1, it is characterised in that the step 3）Apoplexy is colod-application
Large blower is blowed.
A kind of 4. high temperature process for quenching of iron according to power claim 1, it is characterised in that the step 4）Standing process
In, can first it be dried with large blower 1-2 minutes.
A kind of 5. high temperature process for quenching of iron according to power claim 1, it is characterised in that the step 5）The company of current
Afterflow rate is 35L/min-38L/min.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711416672.0A CN107794349A (en) | 2017-12-25 | 2017-12-25 | A kind of high temperature process for quenching of iron |
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| CN201711416672.0A CN107794349A (en) | 2017-12-25 | 2017-12-25 | A kind of high temperature process for quenching of iron |
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| Publication Number | Publication Date |
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| CN107794349A true CN107794349A (en) | 2018-03-13 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103602798A (en) * | 2013-12-02 | 2014-02-26 | 湖州市银鑫轧辊有限公司 | Method for heat treatment on high-hardness semi-steel roller |
| CN103614521A (en) * | 2013-11-25 | 2014-03-05 | 中船动力有限公司 | Medium carbon steel material large diesel engine output shaft tempering process |
| CN103736976A (en) * | 2013-11-15 | 2014-04-23 | 东南大学 | Alloy soil loosening teeth on soil loosening machine and manufacturing method thereof |
-
2017
- 2017-12-25 CN CN201711416672.0A patent/CN107794349A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103736976A (en) * | 2013-11-15 | 2014-04-23 | 东南大学 | Alloy soil loosening teeth on soil loosening machine and manufacturing method thereof |
| CN103614521A (en) * | 2013-11-25 | 2014-03-05 | 中船动力有限公司 | Medium carbon steel material large diesel engine output shaft tempering process |
| CN103602798A (en) * | 2013-12-02 | 2014-02-26 | 湖州市银鑫轧辊有限公司 | Method for heat treatment on high-hardness semi-steel roller |
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Application publication date: 20180313 |
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