CN110283963A - A kind of production technology of 1Cr11MoV Blade Steel - Google Patents
A kind of production technology of 1Cr11MoV Blade Steel Download PDFInfo
- Publication number
- CN110283963A CN110283963A CN201910701892.0A CN201910701892A CN110283963A CN 110283963 A CN110283963 A CN 110283963A CN 201910701892 A CN201910701892 A CN 201910701892A CN 110283963 A CN110283963 A CN 110283963A
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- production technology
- 1cr11mov
- blade steel
- temperature
- temperature control
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Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0006—Adding metallic additives
-
- 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
- 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
- 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
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
-
- 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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- 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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- 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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
Abstract
The invention discloses a kind of production technologies of 1Cr11MoV Blade Steel, comprising the following steps: (1) smelts: using non-vacuum induction furnace+external refining, rare earth alloy is added with stream before tapping casting；(2) ingot casting forging/cogging: 1150-1230 DEG C of heating temperature, at 1000-1100 DEG C, final forging temperature is controlled at 850-950 DEG C for starting forging temperature control；(3) it rolls: hot rolling being carried out according to the specification that user requires after ingot formation, 1100-1200 DEG C of blank heating temperature when hot rolling, start rolling temperature is controlled at 950-1080 DEG C, and finishing temperature control is at 800-900 DEG C；(4) it anneals: it is air-cooled after steel hot rolling, 600-800 DEG C of annealing temperature, soaking time >=for 24 hours, it comes out of the stove air-cooled.The present invention substantially reduces the time of existing Blade Steel production technology, improves production efficiency, and the quality of production of Blade Steel can be guaranteed very well.
Description
Technical field
The invention belongs to alloy material preparation technical fields, and in particular to a kind of production technology of 1Cr11MoV Blade Steel.
Background technique
Blade is the key part of steam turbine, it born under the exacting terms of pole high temperature, high pressure, huge centrifugal force,
The collective effect of steam power, steam-excited vibration power, corrosion and vibration and wet-steam region water droplet erosion.With China's power station steam turbine
High capacity, the security reliability and high efficiency of blade more seem more important.
In order to guarantee the safe and reliable and high efficiency of blade steel quality, many steel mills are using outside non-vacuum induction furnace+furnace
Refining+electroslag remelting or other remelting mode+forging process flows come guarantee molten steel degree of purity and ingot structure it is fine and close
Even, using the above method there are entire production process is more, the period is long, at high cost；Esr process energy consumption is high, pollution is heavy, no
Meet the overall planning of " energy-saving and emission-reduction ".Therefore Blade Steel production technology at this stage is urgently improved, and short route, efficient
Production trend will certainly be by national more and more attention.
Summary of the invention
The purpose of the present invention is that providing one kind had not only guaranteed that the quality safety of blade steel was reliable, but also can simplify technique stream
The improved method of journey.The method of the present invention eliminates the remeltings such as the electroslag remelting generallyd use at present or protective atmosphere electroslag remelting
Mode, but directly adopt non-vacuum induction furnace+external refining+forging mode and produced, substantially reduce existing blade
The time of steel production technology improves production efficiency, and the quality of production of Blade Steel can be guaranteed very well.
To achieve the goals above, The technical solution adopted by the invention is as follows:
A kind of production technology of 1Cr11MoV Blade Steel, using non-vacuum induction furnace when the production technology is included in smelting
+ external refining, is added rare earth alloy before tapping, carries out subsequent forging and heat treatment process.
Since the present invention does not use electroslag remelting process, so with short production cycle, lower production costs, by electroslag remelting one
Ton ingot casting electricity consumption 800-900 degree calculates, and ton steel production cost can save about 1740 yuan of expense.Further, since the present invention produces week
Phase is short, can significantly make an earlier shipment the phase.
The production technology of the above-mentioned 1Cr11MoV Blade Steel referred to, specifically includes the following steps:
(1) it smelts: using non-vacuum induction furnace+external refining, rare earth alloy, casting temperature is added with stream before tapping casting
Degree control is at 1500-1600 DEG C；
(2) ingot casting forging/cogging: 1150-1230 DEG C of heating temperature, starting forging temperature control is at 1000-1100 DEG C, finish-forging temperature
Degree control is at 850-950 DEG C；
(3) it rolls: hot rolling being carried out according to the specification that user requires after ingot formation, blank heating temperature 1100- when hot rolling
1200 DEG C, start rolling temperature is controlled at 950-1080 DEG C, and finishing temperature control is at 800-900 DEG C；
(4) it anneals: it is air-cooled after steel hot rolling, 600-800 DEG C of annealing temperature, soaking time >=for 24 hours, it comes out of the stove air-cooled.
The present invention prepares Blade Steel using above-mentioned production technology, in addition to not using electroslag remelting refinery practice to significant
Shorten outside the production cycle, cleaning principle of the present invention also according to rare earth in molten steel, by the way that rare earth alloy is added into steel, in steel
Under the premise of water deoxygenation is good, rare earth forms dystectic dilute with the low melting points harmful element such as phosphorus, arsenic, tin, antimony, bismuth, lead in steel
Native field trash inhibits these harmful elements in crystal boundary segregation.
The present invention adds appropriate rare earth alloy in steelmaking process, and main function has following several respects: 1, with steel in phosphorus,
The low melting points harmful element such as arsenic, tin, antimony, bismuth, lead forms dystectic Globular RE Sulfide Inclusions, inhibits these harmful elements in crystalline substance
Boundary's segregation strengthens crystal boundary, improves room temperature impact toughness.2, dystectic Globular RE Sulfide Inclusions disperse point that rare earth alloy is formed
Cloth improves the strength of materials in matrix；The high-melting-point field trash of Dispersed precipitate is as the nuclei of crystallization simultaneously, and " pinning " is in matrix
Play the role of refining crystal grain in tissue.
Meanwhile the present invention also passes through to match suitable ingot casting ingot shape and rationally design forging technology makes the coarse branch of ingot casting
Brilliant and columnar grain becomes that crystal grain is thinner, tissue of uniform size, makes original segregation in ingot casting, loose, stomata, slag inclusion equipressure
Reality and soldering, tissue become even closer, and it is horizontal to reach similar electroslag remelting steel ingot.By rationally designing forging technology, adopt
Becoming the large dendritic crystal of ingot casting and columnar grain with aximal deformation value, crystal grain is thinner, tissue of uniform size, make original segregation,
The compactings such as loose, stomata, slag inclusion and soldering, tissue become even closer, improve material property.By finished product sampling and testing, originally
Invented technology resulting materials performance is suitable with original process material property, and non-metallic inclusion control is suitable with original process.Gained leaf
Piece Steel material, mechanics properties testing are as follows: Rp0.2617MPa, Rm778MPa, A 21.5%, Z 64%, ballistic work (Aku2)
94J。
Further, the percentage that the additive amount of the rare earth alloy accounts for quality of molten steel is 0.1~0.5%.
Further, the rare earth alloy includes composition of alloy and Sc and Y in lanthanide series.
Further, the control of step (1) cast temperature is 1560 DEG C.
Further, starting forging temperature control is 1080 DEG C in step (2), final forging temperature control is 860 DEG C.
Further, start rolling temperature control is 1020 DEG C in step (3), finishing temperature control is 850 DEG C.
Further, annealing temperature control is 780 DEG C in step (4), soaking time 26h.
It is a further object to provide the 1Cr11MoV Blade Steel alloy materials being prepared by above-mentioned production technology
Material, the composition and mass percent of the blade Steel material are as follows: C 0.11~0.18%, Si≤0.50%, Mn≤0.60%, P
≤ 0.035%, S≤0.030%, Cr 10.0~11.5%, Ni≤0.60%, Mo 0.50~0.70%, V 0.25~
0.40%, Fe surplus.
Compared with prior art, beneficial effects of the present invention are as follows: the non-vacuum induction furnace smelting process that the present invention selects
It is incorporated in the preceding addition rare earth alloy of tapping and reasonably selects ingot casting ingot shape, addition rare earth alloy, which effectively changes, before tapping is mingled with
The form of object reduces harmful element and refines crystal grain again while the segregation of crystal boundary, dispersion-strengtherning tissue, reasonably selects ingot casting ingot
Type selects suitable ingot shape to match and organizes after rationally designing forging technology and ensuring to forge equal in the case where considering press ability
It is even, it is tiny.
Detailed description of the invention
Fig. 1 is the grain size comparison diagram of gained blade steel alloy material in the embodiment of the present invention, wherein 1 represents the present invention 1,
2, which represent the present invention 2,3, represents comparison Isosorbide-5-Nitrae representative comparison 2；
Fig. 2 is the field trash comparison diagram of gained blade steel alloy material in the embodiment of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments to the present invention
It is specifically described, it is necessary to, it is noted that following embodiment is used only for that the present invention is explained and illustrated, be not used to
Limit the present invention.Some nonessential modifications and adaptations that those skilled in the art are made according to foregoing invention content, still belong to
In protection scope of the present invention.
Embodiment 1
A kind of 1Cr11MoV Blade Steel, element composition and mass percent such as table 1 be formulated shown in (surplus be Fe do not arrange
Out).
Table 1
In above-mentioned table 1 present invention 1 and 2 Blade Steel production technology according to the following steps:
(1) smelt: use non-vacuum induction furnace+external refining, tapping casting before with stream be added rare earth alloy (La and Y,
Mass ratio 1:1, additive amount 0.1%), cast temperature is controlled at 1500 DEG C；
(2) ingot casting forging/cogging: 1180 DEG C of heating temperature, at 1050 DEG C, final forging temperature control exists for starting forging temperature control
850℃；
(3) it rolls: hot rolling being carried out according to the specification that user requires after ingot formation, blank heating temperature 1160 when hot rolling
DEG C, start rolling temperature is controlled at 1060 DEG C, and finishing temperature control is at 850 DEG C；
(4) anneal: air-cooled after steel hot rolling, 780 DEG C of annealing temperature, soaking time 28h comes out of the stove air-cooled.
And it compares 1 and uses non-vacuum induction furnace+external refining+electroslag remelting process, electroslag weight with the production technology for comparing 2
Melt system is using the method in CN104525919A.
The heat treatment process of above-mentioned blade steel alloy material is as shown in table 2, the mechanics properties testing of corresponding gained Blade Steel
The results are shown in Table 2:
Table 2
To the grain size of above-mentioned Blade Steel, test results are shown in figure 1.To the field trash test result base of gained Blade Steel
This is consistent, specifically can be with Fig. 2.
Embodiment 2
According to the scheme of embodiment 1, difference specifically: cast temperature control is at 1600 DEG C in step (1)；Step
(2) rare earth alloy (La and Sc, mass ratio 2:1, additive amount 0.5%) in, 1230 DEG C of heating temperature, starting forging temperature control exists
1100 DEG C, final forging temperature is controlled at 950 DEG C；In step (3) 1200 DEG C of blank heating temperature when hot rolling, start rolling temperature control exists
1080 DEG C, finishing temperature control is at 900 DEG C；800 DEG C of annealing temperature in step (4), soaking time for 24 hours, are come out of the stove air-cooled.
Embodiment 3
According to the method for embodiment 1, difference specifically: cast temperature control is at 1560 DEG C in step (1)；Step
(2) rare earth alloy (Sc and Y, mass ratio 1:1, additive amount 0.2%) in, 1180 DEG C of heating temperature, starting forging temperature control exists
1080 DEG C, final forging temperature is controlled at 860 DEG C；In step (3) 1120 DEG C of blank heating temperature when hot rolling, start rolling temperature control exists
1020 DEG C, finishing temperature control is at 850 DEG C；780 DEG C of annealing temperature, soaking time 26h come out of the stove air-cooled in step (4).
The mechanical property of 3 gained blade steel alloy material of embodiment is Rp0.2682MPa, Rm831MPa, A 23.5%, Z
64%, ballistic work (Aku2) 120J.
Claims (9)
1. a kind of production technology of 1Cr11MoV Blade Steel, which is characterized in that using non-when the production technology is included in smelting
Vaccum sensitive stove+external refining, is added rare earth alloy before tapping, carries out subsequent forging and heat treatment process.
2. the production technology of 1Cr11MoV Blade Steel according to claim 1, which is characterized in that the production technology includes
Following steps:
(1) it smelts: using non-vacuum induction furnace+external refining, rare earth alloy, cast temperature control is added with stream before tapping casting
System is at 1500-1600 DEG C；
(2) ingot casting forging/cogging: 1150-1230 DEG C of heating temperature, starting forging temperature control is at 1000-1100 DEG C, final forging temperature control
System is at 850-950 DEG C；
(3) it rolls: hot rolling being carried out according to the specification that user requires after ingot formation, blank heating temperature 1100-1200 when hot rolling
DEG C, start rolling temperature is controlled at 950-1080 DEG C, and finishing temperature control is at 800-900 DEG C；
(4) it anneals: it is air-cooled after steel hot rolling, 600-800 DEG C of annealing temperature, soaking time >=for 24 hours, it comes out of the stove air-cooled.
3. the production technology of 1Cr11MoV Blade Steel according to claim 2, which is characterized in that the rare earth alloy adds
The percentage that dosage accounts for quality of molten steel is 0.1~0.5%.
4. the production technology of 1Cr11MoV Blade Steel according to claim 1, which is characterized in that the rare earth alloy includes
Composition of alloy and Sc and Y in lanthanide series.
5. the production technology of 1Cr11MoV Blade Steel according to claim 1, which is characterized in that step (1) cast temperature
Control is 1560 DEG C.
6. the production technology of 1Cr11MoV Blade Steel according to claim 1, which is characterized in that open forging temperature in step (2)
Degree control is 1080 DEG C, and final forging temperature control is 860 DEG C.
7. the production technology of 1Cr11MoV Blade Steel according to claim 1, which is characterized in that open rolling temperature in step (3)
Degree control is 1020 DEG C, and finishing temperature control is 850 DEG C.
8. the production technology of 1Cr11MoV Blade Steel according to claim 1, which is characterized in that annealing temperature in step (4)
Degree control is 780 DEG C, soaking time 26h.
9. a kind of 1Cr11MoV Blade Steel that the production technology as described in claim any one of 1-8 is prepared, which is characterized in that
The composition and mass percent of the Blade Steel are as follows: C0.11~0.18%, Si≤0.50%, Mn≤0.60%, P≤
0.035%, S≤0.030%, Cr10.0~11.5%, Ni≤0.60%, Mo0.50~0.70%, V0.25~0.40%, Fe
Surplus.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110863115A (en) * | 2019-11-29 | 2020-03-06 | 四川六合特种金属材料股份有限公司 | Method for improving high-temperature endurance performance of blade steel X19CrMoNbVN11-1 |
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