CN108220546A - The heat treatment process of 16Mn pressure container forgeable piece cryogenic properties - Google Patents
The heat treatment process of 16Mn pressure container forgeable piece cryogenic properties Download PDFInfo
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- CN108220546A CN108220546A CN201711303843.9A CN201711303843A CN108220546A CN 108220546 A CN108220546 A CN 108220546A CN 201711303843 A CN201711303843 A CN 201711303843A CN 108220546 A CN108220546 A CN 108220546A
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- temperature
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- pressure container
- heat treatment
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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
- C21D1/26—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
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- 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
- C21D6/005—Heat treatment of ferrous alloys containing Mn
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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 Treatments In General, Especially Conveying And Cooling (AREA)
Abstract
The present invention provides the heat treatment process of 16Mn pressure container forgeable piece cryogenic properties, belongs to industrial processes technology field, the heat treatment process of 16Mn pressure container forgeable piece cryogenic properties, which is characterized in that include the following steps：Workpiece to be added is subjected to normalized treatment, between ensureing that temperature is 882 DEG C ~ 890 DEG C during normalizing, then carries out 2h heat preservations；Workpiece to be added after heat preservation is made annealing treatment, between ensureing that temperature is 592 DEG C ~ 633 DEG C during annealing, and temperature is reduced to 336 DEG C with the speed of 30 DEG C/h；Roughing processing is carried out to the workpiece to be added after annealing；Between to treated, workpiece to be added makes annealing treatment, and while annealing ensures that temperature is 556 DEG C ~ 596 DEG C；Between ensureing that temperature is 763 DEG C ~ 786 DEG C to treating that workpiece quenches after annealing, during quenching, and 3h is kept the temperature, then oil hardening processing is carried out to workpiece；Workpiece is subjected to temper after quenching treatment, between when tempering ensures that temperature is 687 DEG C ~ 705 DEG C, and carries out heat preservation 3.6h, and be cooled to room temperature.
Description
Technical field
The invention belongs to the heat treatments of industrial processes technology field more particularly to 16Mn pressure container forgeable piece cryogenic properties
Processing technology.
Background technology
16Mn belongs to the low-alloy structural steel of Q345 rank intensity, has good comprehensive mechanical property, good low temperature
Performance, also good plasticity and weldability.Mainly for the manufacture of bridge, vehicle, boiler, oil tank, crane, power station, mine
Machinery, building structure and pressure vessels for the chemical industry etc. bear metal structure, the machine components of live load.Hot rolling or normalized condition use, and can use
In the various structures of less than -40 DEG C cold districts.Therefore, normal steels of the 16Mn steel as pressure container forgeable piece, particularly make
For the normal steels of low-temperature pressure container forging, there is clear advantage.Its material price is cheap, and intensity and hardness easily reach
Design requirement.With the continuous improvement of requirement and design requirement, there is higher want to the impact flexibility of 16Mn steel forgings
It asks.Conventional modifier treatment disclosure satisfy that the design requirement of the intensity of forging and hardness under room temperature, but lower pair of impact of lower temperature
Toughness will appear unqualified phenomenon.For this purpose, we carry out the forging tissue and grain size that are obtained under different hardening and tempering process
Research achievees the purpose that process optimization improves product quality.
Current 16Mn pressure container forgeable piece intensity is low, plasticity is poor and the problem of poor toughness is very serious.
Invention content
In order to solve the above technical problem, the present invention provides the processing of the heat treatment of 16Mn pressure container forgeable piece cryogenic properties
Technique can effectively play raising intensity, and the problem of improve plasticity and toughness.
The heat treatment process of 16Mn pressure container forgeable piece cryogenic properties, includes the following steps：
1）Workpiece to be added is subjected to normalized treatment, between ensureing that temperature is 882 DEG C ~ 890 DEG C during normalizing, then carries out 2h heat preservations；
2）Workpiece to be added after heat preservation is made annealing treatment, between ensureing that temperature is 592 DEG C ~ 633 DEG C during annealing, and temperature
336 DEG C are reduced to the speed of 30 DEG C/h；
3）Roughing processing is carried out to the workpiece to be added after annealing；
4）Between to treated, workpiece to be added makes annealing treatment, and while annealing ensures that temperature is 556 DEG C ~ 596 DEG C；
5）Between ensureing that temperature is 763 DEG C ~ 786 DEG C to treating that workpiece quenches after annealing, during quenching, and 3h is kept the temperature, then
Oil hardening processing is carried out to workpiece；
6）Workpiece is subjected to temper after quenching treatment, between when tempering ensures that temperature is 687 DEG C ~ 705 DEG C, and is kept the temperature
3.6h, and be cooled to room temperature.
Further, step 2）Cooling treatment is carried out after middle annealing, and is cooled to furnace cooling.Answering for workpiece can be eliminated
Power.
Further, step 4）In annealing at least carry out 30min.
Further, step 4）Furnace cooling processing is carried out after middle annealing.
Further, step 5）Speed during middle progress oil hardening is 56 DEG C/s.
Further, step 6）In be cooled to it is air-cooled.
Further, step 6）In room temperature between 24 DEG C ~ 28 DEG C.
Compared with prior art, the present invention has the advantages that：
First, the processing step in this programme is normalizing → annealing → roughing → annealing → quenching → tempering, by to be processed
Part carries out the processing of normalizing annealing, first makes the hardness of workpiece to be added reduce, then carry out roughing, makes processing more convenient, processes
Anneal again afterwards, the processing for quenching and being tempered enables to the intensity of workpiece to improve, and improve workpiece plasticity and
Toughness.
Specific embodiment
With reference to embodiment, the present invention will be further described and explanation, but the invention is not limited in any way.
Embodiment 1
The heat treatment process of 16Mn pressure container forgeable piece cryogenic properties, includes the following steps：
1）Workpiece to be added is subjected to normalized treatment, between ensureing that temperature is 882 DEG C during normalizing, then carries out 2h heat preservations；
2）Workpiece to be added after heat preservation is made annealing treatment, between ensureing that temperature is 592 DEG C during annealing, and temperature is with 30
DEG C/speed of h is reduced to 336 DEG C；
3）Roughing processing is carried out to the workpiece to be added after annealing；
4）Between to treated, workpiece to be added makes annealing treatment, and while annealing ensures that temperature is 556 DEG C；
5）Between ensureing that temperature is 763 DEG C to treating that workpiece quenches after annealing, during quenching, and 3h is kept the temperature, then to workpiece
Carry out oil hardening processing；
6）Workpiece is subjected to temper after quenching treatment, between when tempering ensures that temperature is 687 DEG C, and carries out heat preservation 3.6h,
And it is cooled to room temperature.
Also, step 2）Cooling treatment is carried out after middle annealing, and is cooled to furnace cooling, step 4）In annealing at least carry out
30min, step 4）Furnace cooling processing, step 5 are carried out after middle annealing）Middle speed when carrying out oil hardening is 56 DEG C/s, step 6）In
Be cooled to air-cooled, step 6）In room temperature between 24 DEG C.
Embodiment 2
The heat treatment process of 16Mn pressure container forgeable piece cryogenic properties, includes the following steps：
1）Workpiece to be added is subjected to normalized treatment, between ensureing that temperature is 890 DEG C during normalizing, then carries out 2h heat preservations；
2）Workpiece to be added after heat preservation is made annealing treatment, between ensureing that temperature is 633 DEG C during annealing, and temperature is with 30
DEG C/speed of h is reduced to 336 DEG C；
3）Roughing processing is carried out to the workpiece to be added after annealing；
4）Between to treated, workpiece to be added makes annealing treatment, and while annealing ensures that temperature is 596 DEG C；
5）Between ensureing that temperature is 786 DEG C to treating that workpiece quenches after annealing, during quenching, and 3h is kept the temperature, then to workpiece
Carry out oil hardening processing；
6）Workpiece is subjected to temper after quenching treatment, between when tempering ensures that temperature is 705 DEG C, and carries out heat preservation 3.6h,
And it is cooled to room temperature.
Also, step 2）Cooling treatment is carried out after middle annealing, and is cooled to furnace cooling, step 4）In annealing at least carry out
30min, step 4）Furnace cooling processing, step 5 are carried out after middle annealing）Middle speed when carrying out oil hardening is 56 DEG C/s, step 6）In
Be cooled to air-cooled, step 6）In room temperature between 28 DEG C.
Embodiment 3
The heat treatment process of 16Mn pressure container forgeable piece cryogenic properties, includes the following steps：
1）Workpiece to be added is subjected to normalized treatment, between ensureing that temperature is 888 DEG C during normalizing, then carries out 2h heat preservations；
2）Workpiece to be added after heat preservation is made annealing treatment, between ensureing that temperature is 621 DEG C during annealing, and temperature is with 30
DEG C/speed of h is reduced to 336 DEG C；
3）Roughing processing is carried out to the workpiece to be added after annealing；
4）Between to treated, workpiece to be added makes annealing treatment, and while annealing ensures that temperature is 573 DEG C；
5）Between ensureing that temperature is 772 DEG C to treating that workpiece quenches after annealing, during quenching, and 3h is kept the temperature, then to workpiece
Carry out oil hardening processing；
6）Workpiece is subjected to temper after quenching treatment, between when tempering ensures that temperature is 699 DEG C, and carries out heat preservation 3.6h,
And it is cooled to room temperature.
Also, step 2）Cooling treatment is carried out after middle annealing, and is cooled to furnace cooling, step 4）In annealing at least carry out
30min, step 4）Furnace cooling processing, step 5 are carried out after middle annealing）Middle speed when carrying out oil hardening is 56 DEG C/s, step 6）In
Be cooled to air-cooled, step 6）In room temperature between 27 DEG C.
The basic principles, main features and advantages of the invention have been shown and described above.The technical staff of the industry should
Understand, the invention is not limited in any way above-described embodiment, all to be obtained by the way of equivalent substitution or equivalent transformation
Technical solution is all fallen in protection scope of the present invention.
Claims (7)
- The heat treatment process of 1.16Mn pressure container forgeable piece cryogenic properties, which is characterized in that include the following steps：1）Workpiece to be added is subjected to normalized treatment, between ensureing that temperature is 882 DEG C ~ 890 DEG C during normalizing, then carries out 2h heat preservations；2）Workpiece to be added after heat preservation is made annealing treatment, between ensureing that temperature is 592 DEG C ~ 633 DEG C during annealing, and temperature 336 DEG C are reduced to the speed of 30 DEG C/h；3）Roughing processing is carried out to the workpiece to be added after annealing；4）Between to treated, workpiece to be added makes annealing treatment, and while annealing ensures that temperature is 556 DEG C ~ 596 DEG C；5）Between ensureing that temperature is 763 DEG C ~ 786 DEG C to treating that workpiece quenches after annealing, during quenching, and 3h is kept the temperature, then Oil hardening processing is carried out to workpiece；6）Workpiece is subjected to temper after quenching treatment, between when tempering ensures that temperature is 687 DEG C ~ 705 DEG C, and is kept the temperature 3.6h, and be cooled to room temperature.
- 2. the heat treatment process of 16Mn pressure container forgeable pieces cryogenic property according to claim 1, feature exist In step 2）Cooling treatment is carried out after middle annealing, and is cooled to furnace cooling.
- 3. the heat treatment process of 16Mn pressure container forgeable pieces cryogenic property according to claim 1 or 2, feature It is, step 4）In annealing at least carry out 30min.
- 4. the heat treatment process of 16Mn pressure container forgeable pieces cryogenic property according to claim 3, feature exist In step 4）Furnace cooling processing is carried out after middle annealing.
- 5. the heat treatment process of 16Mn pressure container forgeable pieces cryogenic property according to claim 4, feature exist In step 5）Speed during middle progress oil hardening is 56 DEG C/s.
- 6. the heat treatment process of 16Mn pressure container forgeable pieces cryogenic property according to claim 5, feature exist In step 6）In be cooled to it is air-cooled.
- 7. the heat treatment of the 16Mn pressure container forgeable piece cryogenic properties according to any one in claim 1,2,4,5,6 Processing technology, which is characterized in that step 6）In room temperature between 24 DEG C ~ 28 DEG C.
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Citations (5)
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|---|---|---|---|---|
| CN101871083A (en) * | 2010-06-14 | 2010-10-27 | 南阳汉冶特钢有限公司 | Ultra-thick low-alloy high-strength Q345-series steel plate and production method thereof |
| CN102392195A (en) * | 2011-12-15 | 2012-03-28 | 钢铁研究总院 | High-strength high-toughness nuclear power pressure vessel forging steel and its manufacturing method |
| CN103305672A (en) * | 2013-06-27 | 2013-09-18 | 洛阳中创重型机械有限公司 | Heat treatment process for ultra-large type tube plate forge piece of pressure container |
| CN103981347A (en) * | 2014-04-11 | 2014-08-13 | 中原特钢股份有限公司 | Processing method for grain refinement of CrNiMoV high pressure steel forging |
| CN105039653A (en) * | 2014-12-12 | 2015-11-11 | 天津重型装备工程研究有限公司 | High-strength-and-toughness thermal treatment process method of high-wall-thickness forged piece used in nuclear power pressure container |
-
2017
- 2017-12-11 CN CN201711303843.9A patent/CN108220546A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101871083A (en) * | 2010-06-14 | 2010-10-27 | 南阳汉冶特钢有限公司 | Ultra-thick low-alloy high-strength Q345-series steel plate and production method thereof |
| CN102392195A (en) * | 2011-12-15 | 2012-03-28 | 钢铁研究总院 | High-strength high-toughness nuclear power pressure vessel forging steel and its manufacturing method |
| CN103305672A (en) * | 2013-06-27 | 2013-09-18 | 洛阳中创重型机械有限公司 | Heat treatment process for ultra-large type tube plate forge piece of pressure container |
| CN103981347A (en) * | 2014-04-11 | 2014-08-13 | 中原特钢股份有限公司 | Processing method for grain refinement of CrNiMoV high pressure steel forging |
| CN105039653A (en) * | 2014-12-12 | 2015-11-11 | 天津重型装备工程研究有限公司 | High-strength-and-toughness thermal treatment process method of high-wall-thickness forged piece used in nuclear power pressure container |
Non-Patent Citations (2)
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| 杨满编著: "《热处理实用技术问答》", 30 June 2009, 北京：机械工业出版社 * |
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