CN106011683B - A kind of turbine blade steel of molybdenum cerium composite alloy and preparation method thereof - Google Patents
A kind of turbine blade steel of molybdenum cerium composite alloy and preparation method thereof Download PDFInfo
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- CN106011683B CN106011683B CN201610544152.7A CN201610544152A CN106011683B CN 106011683 B CN106011683 B CN 106011683B CN 201610544152 A CN201610544152 A CN 201610544152A CN 106011683 B CN106011683 B CN 106011683B
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- 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
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
- C22C33/06—Making ferrous alloys by melting using master alloys
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- 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
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
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- 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
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- 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
Abstract
The present invention relates to martensite turbine blade steel, refers in particular to a kind of turbine blade steel of molybdenum cerium composite alloy and preparation method thereof, belongs to field of iron and steel.The present invention adds molybdenum and cerium simultaneously in 1Cr13 steel, the addition of cerium improves activity of the molybdenum in steel, enhances the effect of molybdenum, and cerium can also improve the mechanical behavior under high temperature and corrosion resistance of steel in itself, cerium can also improve the high temperature oxidation resistance of steel simultaneously, serve the effect of composite alloying.Compared with only adding the steel grade of Mo elements, the Ce elements amount of addition is little, and cost increase is few, but enhances the effect of molybdenum and improve high temperature oxidation resistance.Compared with the individually steel grade of addition rare earth element, its mechanical behavior under high temperature, corrosion resistance and mechanical behavior under high temperature are more outstanding.
Description
Technical field
The present invention relates to martensite turbine blade steel, refer in particular to a kind of molybdenum cerium composite alloy turbine blade steel and its
Preparation method, belong to field of iron and steel.
Background technology
1Cr13 steel is representative martensite turbine blade steel, and less than 450 DEG C steam turbine blades of satisfaction make
With requiring, with the raising of steam parameter, 1Cr13 structure of steel stability is poor, it is impossible to adapts to higher service temperature, therefore science and technology
Personnel with the addition of the alloying elements such as Mo, Nb, V, N, W to improve the performance of material at high temperature on the basis of 1Cr13.This
A little alloying elements can play a part of solution strengthening in steel, improve the elevated temperature strength of steel, while can improve the corrosion resistance of material
Can, but the alloying element of the above is acted on without significant raising the high temperature oxidation resistance of stainless steel.
According to conventional achievement in research, rare earth element can be played in steel field trash in deep purifying molten steel, modified steel,
The effect of the solidified structure and microalloying of steel is controlled, " vitamin " of steel is known as, still, before 2010, due to rare earth
It is expensive, it is difficult to widely apply into metallurgical industry.Cerium be in LREE content compared with the metal of horn of plenty, valency
Lattice are relatively cheap, and in recent years, after China is added to WTO, the outlet of rare earth no longer uses quota system, price drops to history
Low spot, but simultaneously, Rare Earth Mine is non-renewable resources is cheap, outlet can only damage the rare-earth industry and correlation of this country in large quantities
Industry, how efficiently to turn into urgent problem to be solved using rare earth element at home.There are some researches show：Added in stainless steel dilute
Earth elements, the mechanical behavior under high temperature and corrosion resisting property of steel can be equally improved, and the high temperature oxidation resistance of steel can be improved simultaneously.
But according to achievement in research, because rare earth atoms radius is too big, the solubility in steel is limited, so rare earth is used alone
Element, steel corrosion resisting property and mechanical behavior under high temperature are improved limited.
From the aspect of the present invention is two based on more than, molybdenum and cerium, the addition of cerium are added at the same time, improves work of the molybdenum in steel
Degree, so as to enhance the effect of molybdenum, cerium can also improve the mechanical behavior under high temperature and corrosion resisting property of steel, can additionally carry in itself
Gao Gang high temperature oxidation resistance, the compound action of two kinds of elements, to the mechanical behavior under high temperature of steel, corrosion resisting property and high temperature resistance oxygen
Change performance and all serve larger raising effect.
The content of the invention
Present invention aims at provide a kind of turbine blade steel of molybdenum cerium composite alloy.1Cr13 steel is most common
The turbine blade steel used under medium and low temperature, other turbine blade steel be largely based on 1Cr13 steel add Mo,
What the alloying elements such as Nb, V, N, W grew up, these elements can improve the corrosion resistance of steel but can not improve the high temperature resistance oxygen of steel
Change performance.Rare-earth element cerium and molybdenum are added in 1Cr13 steel by the present invention simultaneously, serve the effect of composite alloying, simultaneously
Improve steel mechanical behavior under high temperature, corrosion resistance and high temperature oxidation resistance.
Above-mentioned turbine blade steel, its chemical composition calculates according to mass percent is：C 0.10%~0.17%, Mn
0.35%~0.55%, Si 0.30%~0.60%, Ni 0.30%~0.60%, Cr 11.50%~13.00%, Ce
0.02%~0.07%, Mo 0.35%~0.55%, P≤0.030%, S≤0.025%, surplus Fe.
The preparation method of above-mentioned turbine blade steel, it is characterised in that：
The ingot iron weighed up, metallic nickel, metal molybdenum, barren rock electrode ink, crome metal are loaded to the crucible of vaccum sensitive stove
It is interior, vacuumize, be powered and smelt, ferrosilicon, manganese metal are added after melting down 20min, then add aluminium deoxidation, improve furnace temperature to temperature of tapping
Degree, tapped after adding rare earth metal cerium, ingot steel casting is completed in vacuum chamber, pours rear vacuum breaker.
Further, in order to prevent under vacuum splash caused by C-O reactions acutely, shove charge at the beginning to 5min after melting down,
Vacuum is maintained at 200Pa.
Further, in order to ensure deoxidation demand, after the melting down 5min of furnace charge, vacuum is improved to below 30Pa, and is protected
Vacuum 15min is held, then applying argon gas make furnace pressure increase to 0.04MPa, add ferrosilicon, manganese metal, aluminium is added after 2min
Deoxidation.
Further, furnace temperature is improved to tapping temperature to 1570 DEG C, is added rare earth metal cerium, is tapped after 1min, in vacuum
Indoor completion ingot steel casting, pours vacuum breaker after 5min, and can opening hangs out ingot mould, and steel ingot is taken out in the demoulding.
Smelting equipment vaccum sensitive stove used, crucible material MgO, ingot steel casting can be carried out in vacuum chamber, possessed true
Under dummy status three times adduction gold function.In order to ensure not influenceed by the remaining cold steel of crucible, washed before smelting using ingot iron
Stove is twice.
The steel grade of invention, while molybdenum and cerium are added into composite alloying together, its advantage is obvious.Molybdenum element
The mechanical behavior under high temperature and corrosion resisting property of steel can be improved, but is unable to the high temperature oxidation resistance of steel；Cerium can improve the height of steel
Warm mechanical property, corrosion resisting property and high temperature oxidation resistance, but because its solubility in steel is relatively low, to mechanical behavior under high temperature
Acted on corrosion resisting property raising limited.After adding above two element simultaneously, cerium is active element, can improve molybdenum in steel
Activity, strengthens the beneficial effect of molybdenum, and cerium is also improved the effect of mechanical behavior under high temperature and corrosion resisting property, can additionally carried in itself
Gao Gang high temperature oxidation resistance.
In the past, scientific worker had also done more research to rare earth steel, but due to the smelting research to rare earth steel not
Deep enough, the recovery rate of rare earth element and the uniformity in steel cannot be guaranteed, and the example succeeded in developing is less.Existed in the past
Initial smelting period adds rare earth, and rare earth reacts with refractory material, and recovery rate is extremely low, it is difficult to obtains the steel of target content rare earth；In steel
Rare earth, lack of homogeneity of the rare earth in steel ingot are added in ingot mould.Preparation method of the present invention is smelting later stage addition rare earth,
Poured into a mould immediately after rare earth is melting down, both ensure that rare earth metal recovery rate in turn ensure that its uniformity in steel ingot.
Brief description of the drawings
Fig. 1 is that oxidation weight gain experimental result of the steel of the present invention with 1Cr12Mo steel at 700 DEG C contrasts, and is seen by Fig. 1, sent out
Bright steel reduces nearly 50% than the oxidation rate of 1Cr12Mo steel.
Embodiment
Embodiment 1
Using 25kg vacuum induction furnace smeltings, crucible induction furnace is formed by powdery MgO sintering, and steel can be carried out in vacuum chamber
Ingot is poured into a mould, and induction furnace possesses adds alloy material device three times under vacuum state.The raw material of smelting has ingot iron, manganese metal, metal
Molybdenum, metallic nickel, metallic cerium, aluminium, ferrosilicon and barren rock electrode ink (composition adjustment for being used as C) etc..In order to prevent early stage from smelting not
Interference is brought to this experiment composition of steel with the cold steel that steel grade is remained in crucible, smelts preceding ingot iron " prepurging " twice.Smelting
Before refining, alloy, accurate dosing are accurately weighed according to steel ingot 21kg, it is ensured that smelt composition in control range.
The ingot iron weighed up, metallic nickel, metal molybdenum, barren rock electrode ink, crome metal are loaded in crucible, vacuumized, is led to
Electric smelting, in order to prevent splash caused by C-O reactions acutely under vacuum, shove charge at the beginning to melting down rear 5min, vacuum degree control
In 200Pa；After the melting down 5min of furnace charge, vacuum is improved to below 30Pa, keeps 15min to be refined in the vacuum；So
Applying argon gas add ferrosilicon, manganese metal, aluminium deoxidation are added after 2min to 0.04MPa afterwards；Furnace temperature is improved to 1570 DEG C of tapping temperature,
Rare earth metal cerium is added, is tapped after 1min, ingot steel casting is completed in vacuum chamber, 21kg steel ingot is cast into, pours 5min
Vacuum breaker afterwards, can opening hang out ingot mould, and steel ingot is taken out in the demoulding.
According to later-period test result, Blade Steel of the invention, cerium and molybdenum add simultaneously, and cerium improves work of the molybdenum in steel
Degree, serves the effect of composite alloying, is relatively not added with the 1Cr13 steel of molybdenum and cerium and individually adds the 1Cr12Mo steel of molybdenum, it is high
Warm mechanical property, corrosion resisting property and oxidation-resistance property are improved.
Claims (7)
- A kind of 1. turbine blade steel of molybdenum cerium composite alloy, it is characterised in that：Molybdenum and cerium are added simultaneously in 1Cr13 steel, The addition of cerium improves activity of the molybdenum in steel, enhances the effect of molybdenum, and cerium can also improve the mechanical behavior under high temperature of steel in itself And corrosion resistance, cerium can also improve the high temperature oxidation resistance of steel simultaneously, serve the effect of composite alloying；According to quality hundred Fraction calculates, Ce 0.02%~0.07%, Mo 0.35%~0.55%；The turbine blade steel is made with the following method It is standby：The ingot iron weighed up, metallic nickel, metal molybdenum, barren rock electrode ink, crome metal are loaded in the crucible of vaccum sensitive stove, taken out Vacuum, it is powered and smelts, ferrosilicon, manganese metal are added after melting down 20min, then add aluminium deoxidation, improves furnace temperature to tapping temperature, add Tapped after adding rare earth metal cerium, ingot steel casting is completed in vacuum chamber, pour rear vacuum breaker.
- A kind of 2. turbine blade steel of molybdenum cerium composite alloy as claimed in claim 1, it is characterised in that：Its chemical composition Calculated according to mass percent and be：C 0.10%~0.17%, Mn 0.35%~0.55%, Si 0.30%~0.60%, Ni 0.30%~0.60%, Cr 11.50%~13.00%, Ce 0.02%~0.07%, Mo 0.35%~0.55%, P≤ 0.030%, S≤0.025%, surplus Fe.
- A kind of 3. preparation method of the turbine blade steel of molybdenum cerium composite alloy as claimed in claim 1, it is characterised in that： The ingot iron weighed up, metallic nickel, metal molybdenum, barren rock electrode ink, crome metal are loaded in the crucible of vaccum sensitive stove, taken out true Sky, it is powered and smelts, ferrosilicon, manganese metal are added after melting down 20min, then add aluminium deoxidation, improves furnace temperature to tapping temperature, addition Tapped after rare earth metal cerium, ingot steel casting is completed in vacuum chamber, pour rear vacuum breaker.
- A kind of 4. preparation method of the turbine blade steel of molybdenum cerium composite alloy as claimed in claim 3, it is characterised in that： In order to prevent splash caused by C-O reactions acutely under vacuum, shove charge at the beginning to melting down rear 5min, vacuum is maintained at 200Pa.
- A kind of 5. preparation method of the turbine blade steel of molybdenum cerium composite alloy as claimed in claim 3, it is characterised in that： In order to ensure deoxidation demand, after the melting down 5min of furnace charge, vacuum is improved to below 30Pa, and keeps vacuum 15min, so Applying argon gas make furnace pressure increase to 0.04MPa afterwards, add ferrosilicon, manganese metal, aluminium deoxidation is added after 2min.
- A kind of 6. preparation method of the turbine blade steel of molybdenum cerium composite alloy as claimed in claim 3, it is characterised in that： Furnace temperature is improved to tapping temperature to 1570 DEG C, rare earth metal cerium is added, is tapped after 1min, ingot steel casting is completed in vacuum chamber, Vacuum breaker after 5min is poured, can opening hangs out ingot mould, and steel ingot is taken out in the demoulding.
- A kind of 7. preparation method of the turbine blade steel of molybdenum cerium composite alloy as claimed in claim 3, it is characterised in that： Smelting equipment vaccum sensitive stove used, crucible material MgO, ingot steel casting can be carried out in vacuum chamber, is possessed under vacuum state The function of adduction gold three times, in order to ensure not influenceed by the remaining cold steel of crucible, before smelting using ingot iron prepurging twice.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610544152.7A CN106011683B (en) | 2016-07-11 | 2016-07-11 | A kind of turbine blade steel of molybdenum cerium composite alloy and preparation method thereof |
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| CN201610544152.7A CN106011683B (en) | 2016-07-11 | 2016-07-11 | A kind of turbine blade steel of molybdenum cerium composite alloy and preparation method thereof |
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| CN106011683A CN106011683A (en) | 2016-10-12 |
| CN106011683B true CN106011683B (en) | 2017-12-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108165877A (en) * | 2017-12-14 | 2018-06-15 | 江苏大学 | A kind of centrifugal ductile cast tube pipe mould steel containing cerium and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU618445A1 (en) * | 1976-12-25 | 1978-08-05 | Центральный Научно-Исследовательский Институт Технологии Машиностроения | Steel |
| CN1040626A (en) * | 1988-08-22 | 1990-03-21 | 冶金工业部钢铁研究总院 | Maraging steel and manufacture method thereof |
| CN101886230A (en) * | 2010-05-18 | 2010-11-17 | 泰州市永昌冶金设备有限公司 | High temperature steel |
| CN102392184A (en) * | 2011-12-15 | 2012-03-28 | 钢铁研究总院 | High temperature resistant oxyferrite heat resistant steel bar and preparation process thereof |
| CN104018029A (en) * | 2014-05-21 | 2014-09-03 | 西安热工研究院有限公司 | Rare earth-containing high iron and nickel iron-based double-phase alloy |
-
2016
- 2016-07-11 CN CN201610544152.7A patent/CN106011683B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU618445A1 (en) * | 1976-12-25 | 1978-08-05 | Центральный Научно-Исследовательский Институт Технологии Машиностроения | Steel |
| CN1040626A (en) * | 1988-08-22 | 1990-03-21 | 冶金工业部钢铁研究总院 | Maraging steel and manufacture method thereof |
| CN101886230A (en) * | 2010-05-18 | 2010-11-17 | 泰州市永昌冶金设备有限公司 | High temperature steel |
| CN102392184A (en) * | 2011-12-15 | 2012-03-28 | 钢铁研究总院 | High temperature resistant oxyferrite heat resistant steel bar and preparation process thereof |
| CN104018029A (en) * | 2014-05-21 | 2014-09-03 | 西安热工研究院有限公司 | Rare earth-containing high iron and nickel iron-based double-phase alloy |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108165877A (en) * | 2017-12-14 | 2018-06-15 | 江苏大学 | A kind of centrifugal ductile cast tube pipe mould steel containing cerium and preparation method thereof |
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Effective date of registration: 20180815 Address after: 212312 Jiangsu Zhenjiang Danyang city Dan Beizhen back lane Gao Shi Qiao Village Patentee after: Danyang Shuguang Special Steel Co., Ltd. Address before: 211215 No. 368 zhe Ning Road, Lishui Economic Development Zone, Nanjing, Jiangsu Patentee before: Jiangsu University |
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Address after: 212312 Dan Bei Zhen Hou Xiang Gao Shi Qiao Cun, Danyang City, Zhenjiang City, Jiangsu Province Patentee after: Danyang Shuguang New Material Technology Co.,Ltd. Address before: 212312 Jiangsu Zhenjiang Danyang city Dan Beizhen back lane Gao Shi Qiao Village Patentee before: DANYANG COINCH SPECIAL STEEL Co.,Ltd. |
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