CN108315535A - Heat treatment process after a kind of 12Cr2Mo1V hydrogenation reactors forging - Google Patents
Heat treatment process after a kind of 12Cr2Mo1V hydrogenation reactors forging Download PDFInfo
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- CN108315535A CN108315535A CN201810027613.2A CN201810027613A CN108315535A CN 108315535 A CN108315535 A CN 108315535A CN 201810027613 A CN201810027613 A CN 201810027613A CN 108315535 A CN108315535 A CN 108315535A
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- temperature
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- 12cr2mo1v
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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
- C21D1/26—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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/005—Ferrite
-
- 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
- C21D2211/009—Pearlite
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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)
- Forging (AREA)
Abstract
Heat treatment process after a kind of 12Cr2Mo1V hydrogenation reactors forging of present invention offer comprising following steps：High temperature normalizing：Using heat stepwise, first segment heating temperature is 650 720 DEG C, keeps the temperature 0.5 2h/100mm, second segment heating temperature is 250 350 DEG C, keeps the temperature 1 2h/100mm, and third section heating temperature is 1,010 1030 DEG C, 1.5 4h/100mm are kept the temperature, are then cooled to 250 350 DEG C；Isothermal annealing：650 720 DEG C are warming up to, 0.5 1h/100mm is kept the temperature, is warming up to 940 960 DEG C, keeps the temperature 1.5 4h/100mm, is cooled to 650 720 DEG C, 2 4h/100mm is kept the temperature, is cooled to 250 DEG C or less.The present invention effectively eliminates Structure Inheritance, and the coarse-grain mixed crystal situation of forging is obviously improved, and improves the comprehensive performance of forging, while reducing normalizing number after forging, saves production cost.
Description
Technical field
The present invention relates to heavy forging technology fields, more particularly to a kind of 12Cr2Mo1V hydrogenation reactors forging
Heat treatment process afterwards.
Background technology
In petrochemical industry, with being hydrocracked and the improvement of the techniques such as hydrodesulfurization, the increase of light-end products demand, again
The needs of crack refinement, the air conservation of matter feedstock oil etc., have pushed in hydro-refining unit and hydrocracking unit
The development of core equipment and prosperity, and cylinder forgings are the important components in pressure vessel, it is in certain pressure, temperature
With the forging to work long hours under ambient condition, therefore to material in addition to having required higher ambient temperature mechanical properties, according to container
Different use environments and significance level, also require have good high temperature performance, creep strength, fracture toughness, corrosion resistance
Can be inclined to lower temper embrittlement etc..With the increase of capacity and pressure, require to have higher intensity, low to hydrogenation reactor
Warm impact property, welding performance etc..
12Cr2Mo1V materials are exactly that V element is added on the basis of former 12Cr2Mo1 materials, improve the room temperature and height of material
Warm intensity enables forging to work under the pressure and higher temperature of bigger, reaches the V of certain content while can improve resistant to hydrogen
The creep strength of brittleness and material extends the service life of forging.But compared with conventional 12Cr2Mo1 materials, due to adding
Element V, microstructure hereditary phenomenon is obvious, and forging mixed crystal, the problems such as tissue is coarse after heat treatment after forging than more prominent, causes
Poor impact toughness after quenched, to using brings hidden danger.Heat treatment after forging technique is generally using 920-980 DEG C of temperature just at present
Fire can not eliminate pinning effect of the carbide such as VC to crystal boundary since normalizing temperature is relatively low, and coarse-grain, mixed crystal phenomenon are difficult to eliminate,
Coarse bainite structure generates Structure Inheritance, influences product final performance, must carry out multiple normalizing and carry out crystal grain thinning degree, cause
Energy waste delays the production cycle.
Invention content
In view of the foregoing deficiencies of prior art, the purpose of the present invention is to provide a kind of 12Cr2Mo1V hydrogenation reactions
Heat treatment process after device forging, the heat treatment process effectively eliminate Structure Inheritance, have refined grain size, improve forging
Comprehensive performance.
In order to achieve the above objects and other related objects, the present invention provides a kind of 12Cr2Mo1V hydrogenation reactors forging
Heat treatment process afterwards comprising following steps：
1) high temperature normalizing：Using heat stepwise, first segment heating temperature is 650-720 DEG C, keeps the temperature 0.5-2h/
100mm, second segment heating temperature are 250-350 DEG C, keep the temperature 1-2h/100mm, and third section heating temperature is 1010-1030 DEG C, is protected
Warm 1.5-4h/100mm, is then cooled to 250-350 DEG C；
2) isothermal annealing：It is warming up to 650-720 DEG C, 0.5-2h/100mm is kept the temperature, then heats to 940-960 DEG C,
1.5-4h/100mm is kept the temperature, is then cooled to 650-720 DEG C for the first time, 2-4h/100mm is kept the temperature, is then cooled to 250 for the second time
DEG C hereinafter, coming out of the stove.
Preferably, in step 1), first segment heating temperature is 700-720 DEG C.
It is highly preferred that in step 1), first segment heating temperature is 700-710 DEG C, 710-720 DEG C, 705-715 DEG C,
700-705 DEG C or 715-720 DEG C.
Preferably, in step 1), second segment heating temperature is 280-320 DEG C.
It is highly preferred that in step 1), second segment heating temperature is 280-300 DEG C, 300-320 DEG C, 290-300 DEG C,
290-310 DEG C or 310-300 DEG C.
Preferably, in step 1), third section heating temperature is 1015-1025 DEG C.
Preferably, in step 1), the mode that furnace cooling cools down is taken by first segment heating temperature to second segment heating temperature.
Preferably, in step 1), 250-350 DEG C is cooled to by the way of air-cooled cooling by third section heating temperature.
Preferably, in step 2), an isothermal annealing includes the following steps：It is warming up to 700-720 DEG C, keeps the temperature 1-
1.5h/100mm then heats to 940-950 DEG C, keeps the temperature 2.5-3h/100mm, is then cooled to 680-720 DEG C for the first time, protects
Then warm 2-4h/100mm is cooled to 200 DEG C hereinafter, coming out of the stove for the second time.
Preferably, in step 2), the first time cooling and second of cooling are all made of and take furnace cooling cooling
Mode.
The VC being pinned on crystal boundary is dissolved in matrix by the present invention using a high temperature normalizing, by diffusion-homogenization,
Disperse educt in cooling procedure obtains more uniform grain size, is ready for annealing below；The effect of isothermal annealing is
It is balanced state tissue F+P (wherein, F is ferritic phase, and P is pearlitic structrure) after isothermal annealing, and improves grain size,
Prepare so as to carry out sufficient tissue for follow-up property heat treatment.
As described above, heat treatment process after a kind of 12Cr2Mo1V hydrogenation reactors forging of the present invention, has with following
Beneficial effect：
The present invention uses the heat treatment process of a high temperature normalizing and an isothermal annealing, effectively eliminates Structure Inheritance,
Grain size is refined, structure refinement is uniform and stable, and crystal grain more refines, hence it is evident that the defect for alleviating forging improves forging
Comprehensive performance, meets the requirement of hydrogenation reactor forging, while reducing the normalizing number after forging, avoids energy
Source wastes, and has saved production cost.
Description of the drawings
Fig. 1 is shown as the metallograph of the forging obtained after embodiment 1 is heat-treated.
Fig. 2 is shown as the metallograph of the forging obtained after embodiment 2 is heat-treated.
Fig. 3 is shown as the metallograph of the forging obtained after comparative example 1 is heat-treated.
Specific implementation mode
Illustrate that embodiments of the present invention, those skilled in the art can be by this specification below by way of specific specific example
Disclosed content understands other advantages and effect of the present invention easily.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also be based on different viewpoints with application, without departing from
Various modifications or alterations are carried out under the spirit of the present invention.It should be noted that in the absence of conflict, following embodiment and implementation
Feature in example can be combined with each other.
It should be noted that the diagram provided in following embodiment only illustrates the basic structure of the present invention in a schematic way
Think, component count, shape and size when only display is with related component in the present invention rather than according to actual implementation in schema then
Draw, when actual implementation kenel, quantity and the ratio of each component can be a kind of random change, and its assembly layout kenel
It is likely more complexity.
Embodiment 1
Heat treatment process includes the following steps after a kind of 12Cr2Mo1V hydrogenation reactors forging：
1) high temperature normalizing：For forging after press forging molding, 720 DEG C of heat preservation 1h/100mm of shove charge are furnace-cooled to 300
DEG C, keep the temperature 1.5h/100mm, after be warming up to 720 DEG C, keep the temperature 1h/100mm, then 1030 DEG C of heat preservation 2h/100mm are warming up to power
After be air-cooled to 300 DEG C, shove charge.
2) isothermal annealing：After shove charge, 720 DEG C are warming up to, keeps the temperature 1h/100mm, then 950 DEG C are warming up to power
2.5h/100mm is kept the temperature, 720 DEG C of heat preservation 2h/100mm are furnace-cooled to after heat preservation, are then furnace-cooled to 250 DEG C hereinafter, coming out of the stove.
Fig. 1 is shown as the metallograph of the forging obtained after embodiment 1 is heat-treated.By the above heat treatment after forging technique
Grain size reaches 7 grades after hydrogenation reaction container forging carries out property heat treatment.
Embodiment 2
Heat treatment process includes the following steps after a kind of 12Cr2Mo1V hydrogenation reactors forging：
1) high temperature normalizing：For forging after press forging molding, 700 DEG C of heat preservation 1.5h/100mm of shove charge are furnace-cooled to 280
DEG C, keep the temperature 1.5h/100mm, after be warming up to 700 DEG C, keep the temperature 1.5h/100mm, then 1010 DEG C of heat preservation 3h/ are warming up to power
280 DEG C are air-cooled to after 100mm, shove charge.
2) isothermal annealing：After shove charge, 700 DEG C are warming up to, keeps the temperature 1.5h/100mm, then 940 are warming up to power
DEG C heat preservation 3h/100mm, be furnace-cooled to after heat preservation 700 DEG C heat preservation 4h/100mm, be then furnace-cooled to 230 DEG C hereinafter, coming out of the stove.
Fig. 2 is shown as the metallograph of the forging obtained after embodiment 2 is heat-treated.By the above heat treatment after forging technique
Hydrogenation reaction container forging, grain size reaches 7 grades after carrying out property heat treatment.
Comparative example 1
Heat treatment process includes the following steps after traditional 12Cr2Mo1V hydrogenation reactor forgings：
1) first time normalizing：For forging after press forging molding, 380 DEG C of heat preservation 1.5h/100mm of shove charge are warming up to 710
DEG C, 0.5h/100mm is kept the temperature, then 330 DEG C are air-cooled to after being warming up to 960 DEG C of heat preservation 3h/100mm with power, shove charge.
2) second of normalizing：After forging shove charge, 0.5h/100mm is kept the temperature at 330 DEG C, is warming up to 710 DEG C, keeps the temperature 0.5h/
100mm, then 940 DEG C of heat preservation 3h/100mm are warming up to power, it is hung out after heat preservation and is air-cooled to 330 DEG C, shove charge.
3) high tempering：By second of air-cooled rear forging shove charge, 330 DEG C are warming up to, 1h/100mm is kept the temperature, then heats to
710 DEG C, 3h/100mm is kept the temperature ,≤250 DEG C are furnace-cooled to after heat preservation and is come out of the stove.
Fig. 3 is shown as the metallograph of the forging obtained after comparative example 1 is heat-treated.By the above heat treatment after forging technique
Hydrogenation reaction container forging carries out 6 grades of grain size after property heat treatment, and coarse-grain, mixed crystal phenomenon occurs in 3 grades of part.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology can all carry out modifications and changes to above-described embodiment without violating the spirit and scope of the present invention.Cause
This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by those of ordinary skill in the art such as
At all equivalent modifications or change, should by the present invention claim be covered.
Claims (8)
1. heat treatment process after a kind of 12Cr2Mo1V hydrogenation reactors forging, which is characterized in that it includes the following steps：
1) high temperature normalizing：Using heat stepwise, first segment heating temperature is 650-720 DEG C, keeps the temperature 0.5-2h/100mm, the
Two sections of heating temperatures are 250-350 DEG C, keep the temperature 1-2h/100mm, and third section heating temperature is 1010-1030 DEG C, keeps the temperature 1.5-
Then 4h/100mm is cooled to 250-350 DEG C；
2) isothermal annealing：It is warming up to 650-720 DEG C, keeps the temperature 0.5-2h/100mm, then heats to 940-960 DEG C, heat preservation
1.5-4h/100mm, is then cooled to 650-720 DEG C for the first time, keeps the temperature 2-4h/100mm, be then cooled to for the second time 250 DEG C with
Under, it comes out of the stove.
2. heat treatment process after 12Cr2Mo1V hydrogenation reactors forging according to claim 1, it is characterised in that：
In step 1), first segment heating temperature is 700-720 DEG C.
3. heat treatment process after 12Cr2Mo1V hydrogenation reactors forging according to claim 1, it is characterised in that：
In step 1), second segment heating temperature is 280-320 DEG C.
4. heat treatment process after 12Cr2Mo1V hydrogenation reactors forging according to claim 1, it is characterised in that：
In step 1), third section heating temperature is 1015-1025 DEG C.
5. heat treatment process after 12Cr2Mo1V hydrogenation reactors forging according to claim 1, it is characterised in that：
In step 1), the mode that furnace cooling cools down is taken by first segment heating temperature to second segment heating temperature.
6. heat treatment process after 12Cr2Mo1V hydrogenation reactors forging according to claim 1, it is characterised in that：
In step 1), 250-350 DEG C is cooled to by the way of air-cooled cooling by third section heating temperature.
7. heat treatment process after 12Cr2Mo1V hydrogenation reactors forging according to claim 1, it is characterised in that：
In step 2), an isothermal annealing includes the following steps：It is warming up to 700-720 DEG C, 1-1.5h/100mm is kept the temperature, then rises
Temperature keeps the temperature 2.5-3h/100mm to 940-950 DEG C, is then cooled to 680-720 DEG C for the first time, keeps the temperature 2-4h/100mm, then
It is cooled to 200 DEG C for the second time hereinafter, coming out of the stove.
8. heat treatment process after 12Cr2Mo1V hydrogenation reactors forging according to claim 1, it is characterised in that：
In step 2), the first time cooling and second of cooling are all made of the mode for taking furnace cooling to cool down.
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| CN201810027613.2A CN108315535B (en) | 2018-01-11 | 2018-01-11 | After-forging heat treatment process for 12Cr2Mo1V hydrogenation reactor forge piece |
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| CN201810027613.2A CN108315535B (en) | 2018-01-11 | 2018-01-11 | After-forging heat treatment process for 12Cr2Mo1V hydrogenation reactor forge piece |
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Cited By (2)
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| CN110283974A (en) * | 2019-07-22 | 2019-09-27 | 洛阳中创重型机械有限公司 | A kind of heat treatment process of pressure vessel 12Cr2Mo1V steel forgings |
| CN111440929A (en) * | 2020-04-10 | 2020-07-24 | 合肥通用机械研究院有限公司 | Design and manufacturing method of high-pressure hydrogen-contacting self-tightening combined sealing element |
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| CN111440929A (en) * | 2020-04-10 | 2020-07-24 | 合肥通用机械研究院有限公司 | Design and manufacturing method of high-pressure hydrogen-contacting self-tightening combined sealing element |
| CN111440929B (en) * | 2020-04-10 | 2021-11-12 | 合肥通用机械研究院有限公司 | Design and manufacturing method of high-pressure hydrogen-contacting self-tightening combined sealing element |
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Denomination of invention: A post forging heat treatment process for 12Cr2Mo1V hydrogenation reactor forgings Effective date of registration: 20230323 Granted publication date: 20200324 Pledgee: Yucheng Branch of Agricultural Bank of China Ltd. Pledgor: TONGYU HEAVY INDUSTRY Co.,Ltd. Registration number: Y2023980035948 |
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