CN109971936A - Reduce 2.25Cr-1Mo-0.3V side edge of steel plate hardness method - Google Patents
Reduce 2.25Cr-1Mo-0.3V side edge of steel plate hardness method Download PDFInfo
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- CN109971936A CN109971936A CN201910279385.2A CN201910279385A CN109971936A CN 109971936 A CN109971936 A CN 109971936A CN 201910279385 A CN201910279385 A CN 201910279385A CN 109971936 A CN109971936 A CN 109971936A
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- steel plate
- tempering
- hardness
- heat treatment
- side edge
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Classifications
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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
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/002—Heat treatment of ferrous alloys containing Cr
-
- 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0081—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
Abstract
The invention discloses a kind of reduction 2.25Cr-1Mo-0.3V side edge of steel plate hardness methods, and the method includes steel plate rollings and steel plate heat treatment procedure.The present invention do not cut after steel plate rolling, stacking it is bilateral directly enter furnace and be heat-treated, the waste heat after effective use steel plate tempering is cut, and the production efficiency of steel plate is greatly improved while not influencing plate property, shortens the delivery cycle；By control tempering temperature, tempering heating time, furnace temperature uniformity is paid close attention at any time, to control the dissolution of carbide and pick-up behavior in steel, fundamentally improves the hardness mean value and uniformity of steel plate.2.25Cr-1Mo-0.3V steel plate of the present invention with a thickness of 100-110mm, the side hardness of steel plate is reduced to 206-214HV, and state strength reduction of delivering goods improves the integrally formed performance of steel plate to 730-745MPa；It is not cracked in coiling process through user using feedback.
Description
Technical field
The invention belongs to metallurgical technology fields, and in particular to a kind of reduction 2.25Cr-1Mo-0.3V side edge of steel plate hardness side
Method.
Background technique
In recent years, domestic some steel mills have produced 2.25Cr-1Mo-0.3V steel referring to ASME or GB713 standard in succession
Plate, the chrome molybdenum steel plate have intensity higher, preferably anti-due to the addition of vanadium by its refined crystalline strengthening and precipitation enhancement
Hydrogen attack, anti-hydrogen embrittlement and resistant to hydrogen cause the advantages that removing, are chiefly used in manufacturing hydrogenator plate welding type, alleviate China to a certain extent
To the pressure of high added value chrome molybdenum steel plate demand, the product manufacturing period is effectively shortened while successfully substituting import.
However, due to making steel both at home and abroad, steel rolling and heat treatment technics be not quite similar, such steel of domestic production chemistry at
Point, Some Mechanical Properties and metallographic structure etc. it is close with inlet plate, but its tendency of hardenability and solderability still have
Larger difference, in addition the steel increases compared to 2.25Cr-1Mo intensity, the characteristics such as hardness and crack sensitivity raising, domestic production
Such hardness of steel, hardness are higher, and especially fiery trimming hardness is higher, and coil breaks easily occurs when manufactory rolls, gives steel mill and equipment
Manufactory brings no small loss.
Therefore, by process innovation, 2.25Cr-1Mo-0.3V steel plate new production process is developed, 2.25Cr- is effectively reduced
The side hardness and strength of 1Mo-0.3V steel plate, economic benefit and social benefit are significant.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of reduction 2.25Cr-1Mo-0.3V side edge of steel plate hardness methods.
In order to solve the above technical problems, the technical solution used in the present invention is: a kind of reduction 2.25Cr-1Mo-0.3V steel
Plate side hardness method, the method includes steel plate rollings and steel plate heat treatment procedure；The steel plate heat treatment procedure, using just
Fire+tempering heat treatment process, tempering temperature control, in 3.3-3.6min/mm, are returned in 730-735 DEG C, tempering insulation time control
Steel plate waste heat is made full use of to cut steel plate two sides along its length at 200-230 DEG C after fire.
Steel plate rolling process of the present invention does not cut after steel plate rolling, stacking 24-28h bilateral directly to enter furnace and carry out hot place
Reason.
Steel plate heat treatment procedure of the present invention cuts steel plate two sides along its length, side excision after tempering
Amount is the 6-9% of steel plate width.
Steel plate of the present invention with a thickness of 100-110mm.
The method of the invention makes the side hardness of 2.25Cr-1Mo-0.3V steel plate be reduced to 206-214HV, and delivery state is strong
Degree is reduced to 730-745MPa.
The beneficial effects of adopting the technical scheme are that 1, production method of the present invention is in steel plate rolling, stacking
Do not cut afterwards it is bilateral directly enter furnace and be heat-treated, and the waste heat efficiently used after steel plate tempering is cut, and steel plate hot is avoided
Processing cools, the unnecessary heating cost consumption such as preheating before cutting, while significantly mentioning while not influencing plate property
The high production efficiency of steel plate, shortens the delivery cycle.2, the present invention is tempered while guaranteeing plate property qualification by control
Temperature, tempering heating time, pay close attention to furnace temperature uniformity at any time, to control the dissolution of carbide in steel and row is precipitated
Fundamentally to improve the hardness mean value and uniformity of steel plate, improving the integrally formed performance of steel plate.3,2.25Cr- of the present invention
1Mo-0.3V steel plate with a thickness of 100-110mm, the side hardness of steel plate is reduced to 206-214HV, and delivery state strength reduction is extremely
730-745MPa；Steel plate is through user using feeding back, and not cracked in coiling process, processability is good.
Specific embodiment
The present invention will be further described in detail below with reference to specific embodiments.
Embodiment 1
The present embodiment 2.25Cr-1Mo-0.3V steel plate with a thickness of 100mm, reduce 2.25Cr-1Mo-0.3V side edge of steel plate hardness
Method includes steel plate rolling and steel plate heat treatment procedure, and specific process step is as described below:
(1) steel plate rolling process: by converter just refining, ladle furnace refining, VD is vacuumized, 300mm section crystallizer continuous casting obtains
Continuous casting billet, slab is rolled through 4100mm two-stand mills, stacking is not cut after for 24 hours and bilateral directly enter furnace and be heat-treated；
(2) normalizing+tempering heat treatment process, 730 DEG C of tempering temperature, tempering insulation time steel plate heat treatment procedure: are used
3.6min/mm makes full use of steel plate waste heat to cut steel plate two sides along its length at 200 DEG C after tempering, side is cut
Except 6% that amount is steel plate width.
Side hardness, the delivery state intensity index of 2.25Cr-1Mo-0.3V steel plate obtained by the present embodiment are shown in Table 1.
Embodiment 2
The present embodiment 2.25Cr-1Mo-0.3V steel plate with a thickness of 105mm, reduce 2.25Cr-1Mo-0.3V side edge of steel plate hardness
Method includes steel plate rolling and steel plate heat treatment procedure, and specific process step is as described below:
(1) steel plate rolling process: by converter just refining, ladle furnace refining, VD is vacuumized, 300mm section crystallizer continuous casting obtains
Continuous casting billet, slab rolls through 4100mm two-stand mills, does not cut after stacking 26h bilateral directly to enter furnace and be heat-treated；
(2) normalizing+tempering heat treatment process, 731 DEG C of tempering temperature, tempering insulation time steel plate heat treatment procedure: are used
3.4min/mm makes full use of steel plate waste heat to cut steel plate two sides along its length at 210 DEG C after tempering, side is cut
Except 6.5% that amount is steel plate width.
Side hardness, the delivery state intensity index of 2.25Cr-1Mo-0.3V steel plate obtained by the present embodiment are shown in Table 1.
Embodiment 3
The present embodiment 2.25Cr-1Mo-0.3V steel plate with a thickness of 108mm, reduce 2.25Cr-1Mo-0.3V side edge of steel plate hardness
Method includes steel plate rolling and steel plate heat treatment procedure, and specific process step is as described below:
(1) steel plate rolling process: by converter just refining, ladle furnace refining, VD is vacuumized, 300mm section crystallizer continuous casting obtains
Continuous casting billet, slab rolls through 4100mm two-stand mills, does not cut after stacking 28h bilateral directly to enter furnace and be heat-treated；
(2) normalizing+tempering heat treatment process, 733 DEG C of tempering temperature, tempering insulation time steel plate heat treatment procedure: are used
3.5min/mm makes full use of steel plate waste heat to cut steel plate two sides along its length at 220 DEG C after tempering, side is cut
Except 6.8% that amount is steel plate width.
Side hardness, the delivery state intensity index of 2.25Cr-1Mo-0.3V steel plate obtained by the present embodiment are shown in Table 1.
Embodiment 4
The present embodiment 2.25Cr-1Mo-0.3V steel plate with a thickness of 109mm, reduce 2.25Cr-1Mo-0.3V side edge of steel plate hardness
Method includes steel plate rolling and steel plate heat treatment procedure, and specific process step is as described below:
(1) steel plate rolling process: by converter just refining, ladle furnace refining, VD is vacuumized, 300mm section crystallizer continuous casting obtains
Continuous casting billet, slab rolls through 4100mm two-stand mills, does not cut after stacking 25h bilateral directly to enter furnace and be heat-treated；
(2) normalizing+tempering heat treatment process, 734 DEG C of tempering temperature, tempering insulation time steel plate heat treatment procedure: are used
3.4min/mm makes full use of steel plate waste heat to cut steel plate two sides along its length at 225 DEG C after tempering, side is cut
Except 7.4% that amount is steel plate width.
Side hardness, the delivery state intensity index of 2.25Cr-1Mo-0.3V steel plate obtained by the present embodiment are shown in Table 1.
Embodiment 5
The present embodiment 2.25Cr-1Mo-0.3V steel plate with a thickness of 110mm, reduce 2.25Cr-1Mo-0.3V side edge of steel plate hardness
Method includes steel plate rolling and steel plate heat treatment procedure, and specific process step is as described below:
(1) steel plate rolling process: by converter just refining, ladle furnace refining, VD is vacuumized, 300mm section crystallizer continuous casting obtains
Continuous casting billet, slab rolls through 4100mm two-stand mills, does not cut after stacking 27h bilateral directly to enter furnace and be heat-treated；
(2) normalizing+tempering heat treatment process, 735 DEG C of tempering temperature, tempering insulation time steel plate heat treatment procedure: are used
3.3min/mm makes full use of steel plate waste heat to cut steel plate two sides along its length at 230 DEG C after tempering, side is cut
Except 7.7% that amount is steel plate width.
Side hardness, the delivery state intensity index of 2.25Cr-1Mo-0.3V steel plate obtained by the present embodiment are shown in Table 1.
Embodiment 6
The present embodiment 2.25Cr-1Mo-0.3V steel plate with a thickness of 102mm, reduce 2.25Cr-1Mo-0.3V side edge of steel plate hardness
Method includes steel plate rolling and steel plate heat treatment procedure, and specific process step is as described below:
(1) steel plate rolling process: by converter just refining, ladle furnace refining, VD is vacuumized, 300mm section crystallizer continuous casting obtains
Continuous casting billet, slab rolls through 4100mm two-stand mills, does not cut after stacking 26h bilateral directly to enter furnace and be heat-treated；
(2) normalizing+tempering heat treatment process, 732 DEG C of tempering temperature, tempering insulation time steel plate heat treatment procedure: are used
3.5min/mm makes full use of steel plate waste heat to cut steel plate two sides along its length at 215 DEG C after tempering, side is cut
Except 8.0% that amount is steel plate width.
Side hardness, the delivery state intensity index of 2.25Cr-1Mo-0.3V steel plate obtained by the present embodiment are shown in Table 1.
Embodiment 7
The present embodiment 2.25Cr-1Mo-0.3V steel plate with a thickness of 104mm, reduce 2.25Cr-1Mo-0.3V side edge of steel plate hardness
Method includes steel plate rolling and steel plate heat treatment procedure, and specific process step is as described below:
(1) steel plate rolling process: by converter just refining, ladle furnace refining, VD is vacuumized, 300mm section crystallizer continuous casting obtains
Continuous casting billet, slab rolls through 4100mm two-stand mills, does not cut after stacking 27.5h bilateral directly to enter furnace and be heat-treated；
(2) normalizing+tempering heat treatment process, 734 DEG C of tempering temperature, tempering insulation time steel plate heat treatment procedure: are used
3.4min/mm makes full use of steel plate waste heat to cut steel plate two sides along its length at 205 DEG C after tempering, side is cut
Except 8.5% that amount is steel plate width.
Side hardness, the delivery state intensity index of 2.25Cr-1Mo-0.3V steel plate obtained by the present embodiment are shown in Table 1.
Embodiment 8
The present embodiment 2.25Cr-1Mo-0.3V steel plate with a thickness of 106mm, reduce 2.25Cr-1Mo-0.3V side edge of steel plate hardness
Method includes steel plate rolling and steel plate heat treatment procedure, and specific process step is as described below:
(1) steel plate rolling process: by converter just refining, ladle furnace refining, VD is vacuumized, 300mm section crystallizer continuous casting obtains
Continuous casting billet, slab rolls through 4100mm two-stand mills, does not cut after stacking 28h bilateral directly to enter furnace and be heat-treated；
(2) normalizing+tempering heat treatment process, 730 DEG C of tempering temperature, tempering insulation time steel plate heat treatment procedure: are used
3.5min/mm makes full use of steel plate waste heat to cut steel plate two sides along its length at 218 DEG C after tempering, side is cut
Except 9.0% that amount is steel plate width.
Side hardness, the delivery state intensity index of 2.25Cr-1Mo-0.3V steel plate obtained by the present embodiment are shown in Table 1.
Side hardness, the delivery state intensity index of 1 embodiment 1-8 2.25Cr-1Mo-0.3V steel plate of table
As it can be seen from table 1 using the 2.25Cr-1Mo-0.3V side edge of steel plate hardness mean value of the method for the present invention production in 206-
214HV, the 247HV required lower than user；Tensile strength mean value is in 730-745MPa, lower than the 760MPa of standard requirements；
2.25Cr-1Mo-0.3V steel plate is through user using feeding back, and not cracked in coiling process, processability is good.
The above embodiments are only used to illustrate and not limit the technical solutions of the present invention, although referring to above-described embodiment to this hair
It is bright to be described in detail, those skilled in the art should understand that: still the present invention can be modified or be waited
With replacement, without departing from the spirit or scope of the invention, or any substitutions, should all cover in power of the invention
In sharp claimed range.
Claims (5)
1. a kind of reduction 2.25Cr-1Mo-0.3V side edge of steel plate hardness method, which is characterized in that the method includes steel plate rollings
With steel plate heat treatment procedure；The steel plate heat treatment procedure, using normalizing+tempering heat treatment process, tempering temperature control exists
730-735 DEG C, tempering insulation time control make full use of steel plate waste heat in 200-230 after 3.3-3.6min/mm, tempering
Steel plate two sides along its length are cut at DEG C.
2. a kind of reduction 2.25Cr-1Mo-0.3V side edge of steel plate hardness method according to claim 1, which is characterized in that
The steel plate rolling process does not cut after steel plate rolling, stacking 24-28h bilateral directly to enter furnace and be heat-treated.
3. a kind of reduction 2.25Cr-1Mo-0.3V side edge of steel plate hardness method according to claim 1, which is characterized in that
The steel plate heat treatment procedure, cuts steel plate two sides along its length after tempering, side resection is steel plate width
6-9%。
4. a kind of reduction 2.25Cr-1Mo-0.3V side edge of steel plate hardness method according to claim 1 to 3,
Be characterized in that, the steel plate with a thickness of 100-110mm.
5. a kind of reduction 2.25Cr-1Mo-0.3V side edge of steel plate hardness method according to claim 1 to 3,
It is characterized in that, the method makes the side hardness of 2.25Cr-1Mo-0.3V steel plate be reduced to 206-214HV, delivery state intensity drop
Down to 730-745MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910279385.2A CN109971936A (en) | 2019-04-09 | 2019-04-09 | Reduce 2.25Cr-1Mo-0.3V side edge of steel plate hardness method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910279385.2A CN109971936A (en) | 2019-04-09 | 2019-04-09 | Reduce 2.25Cr-1Mo-0.3V side edge of steel plate hardness method |
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| CN109971936A true CN109971936A (en) | 2019-07-05 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2051186C1 (en) * | 1992-04-03 | 1995-12-27 | Государственное предприятие "Тульский оружейный завод" | Method of working tool of high speed steel |
| CN102248116A (en) * | 2011-03-30 | 2011-11-23 | 浙江迪特高强度螺栓有限公司 | Manufacturing process for bolt with high strength of more than phi 30 |
| CN103882344A (en) * | 2014-03-11 | 2014-06-25 | 舞阳钢铁有限责任公司 | Vanadium, chromium and molybdenum added steel plate and production method thereof |
| CN108456827A (en) * | 2018-01-30 | 2018-08-28 | 舞阳钢铁有限责任公司 | A kind of modified adds vanadium chrome molybdenum steel plate and its production method |
-
2019
- 2019-04-09 CN CN201910279385.2A patent/CN109971936A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2051186C1 (en) * | 1992-04-03 | 1995-12-27 | Государственное предприятие "Тульский оружейный завод" | Method of working tool of high speed steel |
| CN102248116A (en) * | 2011-03-30 | 2011-11-23 | 浙江迪特高强度螺栓有限公司 | Manufacturing process for bolt with high strength of more than phi 30 |
| CN103882344A (en) * | 2014-03-11 | 2014-06-25 | 舞阳钢铁有限责任公司 | Vanadium, chromium and molybdenum added steel plate and production method thereof |
| CN108456827A (en) * | 2018-01-30 | 2018-08-28 | 舞阳钢铁有限责任公司 | A kind of modified adds vanadium chrome molybdenum steel plate and its production method |
Non-Patent Citations (1)
| Title |
|---|
| 刘青山: "BHW35钢锅炉封头热压工艺", 《工业锅炉》 * |
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Application publication date: 20190705 |