CN102896303A - Nickel base alloy cast ingot and preparation method thereof - Google Patents
Nickel base alloy cast ingot and preparation method thereof Download PDFInfo
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- CN102896303A CN102896303A CN2011102141693A CN201110214169A CN102896303A CN 102896303 A CN102896303 A CN 102896303A CN 2011102141693 A CN2011102141693 A CN 2011102141693A CN 201110214169 A CN201110214169 A CN 201110214169A CN 102896303 A CN102896303 A CN 102896303A
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Abstract
The invention discloses a preparation method of a nickel base alloy cast ingot. The preparation method comprises the following steps of: pouring nickel base alloy molten steel into a casting mould; and heating the molten steel in the casting mould by an electric arc device, and after that, cooling to obtain the cast ingot, wherein a pair of electrodes in the electric arc device are nonconsumable electrodes, and a bottom plate of the casting mould is a cooling water tank. The method greatly shortens the production period, saves the auxiliary material and saves a great deal of energy. The invention also discloses the nickel base alloy cast ingot prepared by the method, and the nickel base alloy cast ingot is good in crystalline state and high in alloy purity.
Description
Technical field
The present invention relates to the alloy cast ingot field, relate in particular to a kind of nickel-base alloy ingot casting and preparation method thereof.
Background technology
In the prior art, the method for production nickel-base alloy ingot casting has vacuum induction melting to add the electroslag remelting and vacuum induction melting adds vacuum consumable.The two all needs smelting and pouring to become consutrode to carry out secondary remelting under cold conditions after surface treatment and welding, and secondary remelting is wasted a large amount of man-hours, consume a large amount of auxiliary material and electric energy.The former is subjected to air pollution so that alloy purity reduces greatly when carrying out secondary remelting, be subjected to the impact of slag charge to cause the chemical composition of alloy cast ingot unstable, and it is even to be subjected to electrode boundary face pilot to cause inside ingot tissue odds.Though the latter carries out the homogeneous chemical composition that secondary remelting can guarantee alloy cast ingot, field trash can not get abundant eliminating in the alloy, and the ingot casting crystalline state is poor, the surface texture defective is dark, and the ingot casting lumber recovery is low.
How can be under the condition of energy savings, reduction cost, shortening production cycle, simplification production process, producing high-quality nickel-base alloy ingot casting is metallurgical engineering technical staff urgent problem.
Summary of the invention
The technical issues that need to address of the present invention are to prepare in the ingot casting technology secondary remelting and waste a large amount of man-hours, consume a large amount of auxiliary material and electric energy in order to overcome existing nickel-base alloy, the chemical composition of alloy cast ingot is unstable, interior tissue is inhomogeneous or the ingot casting crystalline state is poor, the surface texture defective is dark, the defective that the ingot casting lumber recovery is low, nickel-base alloy ingot casting that a kind of crystalline state is good, alloy purity is high and preparation method thereof is provided, omitted the step of secondary remelting, can greatly shorten the production cycle, save auxiliary material, save mass energy.
The present invention solves the problems of the technologies described above by the following technical programs.
The invention provides a kind of preparation method of nickel-base alloy ingot casting, it comprises the steps:
The nickel-base alloy molten steel is cast in the mold, adopts arcing device to heat molten steel in this mold, heat complete after, cool off to get ingot casting, get final product; Wherein, the electrode in the described arcing device is a pair of non-consumable electrode; Described non-consumable electrode is positioned at the top of this mold; Described mold base plate is a cooling water tank.
Nickel-base alloy described in the present invention is the nickel-base alloy of common indication in this area, specifically refers to the highest alloy of nickel content in each component of alloy; Preferably, described nickel-base alloy is that the trade mark is the nickel-base alloy of Inconel625, Inconel690, Inconel718, GH3030, GH3128, Inconel600,254SMO, Incoloy825 or Hastelloy C276.
Wherein, the pouring temperature of described nickel-base alloy molten steel is the conventional temperature of this area; Preferably, the pouring temperature of described nickel-base alloy molten steel is 1500 ℃～1700 ℃.
Wherein, be provided with the recirculated cooling water that temperature is environment temperature in the described cooling water tank.Environment temperature described in the present invention is ambient temperature range conventional in this area, is generally 5～50 ℃.
Wherein, described mold is the conventional mold of this area; Preferably, described mold is higher than 800 ℃ heat resisting steel by heat resisting temperature and makes; More preferably, described mold is that any heat resisting steel among 00Cr25Ni20,2Cr23Ni13,2Cr25Ni20,1Cr16Ni35,0Cr18Ni9 and the 0Cr23Ni13 is made by the trade mark.
Wherein, described mold shape can be the various conventional shapes of this area mold, can be as required cylinder or cuboid.
Wherein, described arcing device generally comprises a current generating apparatus and pair of electrodes.
Preferably, described non-consumable electrode is positioned at the upper surface of described mold, and is centrosymmetric with respect to the center of this upper surface.
Preferably, the heating power of described arcing device is 150KW～500KW; More preferably, the heating power of described arcing device is 150KW～300KW.
Preferably, be 30～90 minutes the heat time heating time of described arcing device.
Wherein, described mold volumes is the conventional volume of this area mold; Preferably, the volume of described mold is 0.092 cubic metre～0.51 cubic metre.
At one preferably in the embodiment of the present invention, described preparation method's concrete operation step is:
The nickel-base alloy molten steel that the vacuum induction furnace refining is good is poured in tundish, from the mouth of a river, described tundish bottom described nickel-base alloy molten steel is cast in the described mold, adopt described arcing device to heat molten steel in this mold, heat complete after, cool off to get described ingot casting.
Preferably, the temperature in the described tundish is 1500 ℃～1700 ℃.
The present invention also provides a kind of nickel-base alloy ingot casting that is made by said method.
Wherein, described nickel-base alloy ingot casting is preferably the nickel-base alloy ingot casting that the trade mark is Inconel625, Inconel690, Inconel718, GH3030, GH3128, Inconel600,254SMO, Incoloy825 or Hastelloy C276.
Among the present invention, but above-mentioned optimum condition any combination on the basis that meets this area general knowledge namely gets each preferred embodiment of the present invention.
Raw material of the present invention and reagent is commercially available getting all.
Compared with prior art, positive progressive effect of the present invention is:
1) avoids secondary remelting, greatly shortened the production cycle, saved auxiliary material, saved mass energy;
Alloy when 2) having avoided secondary remelting is subjected to the scaling loss of air pollution and alloying element, thereby alloy degree of purity and ingot casting lumber recovery are significantly improved;
3) utilize molten steel in the electric arc heated mold between the non-consumable electrode two ends, utilize simultaneously the cooling water tank of mold bottom to realize molten steel directional solidification from bottom to top, so that the ingot casting feeding is abundant, thereby obtain the good nickel-base alloy ingot casting of crystalline state.
Description of drawings
Fig. 1 is preparation method's schematic diagram of nickel-base alloy ingot casting.
Fig. 2 is the photo on embodiment 1～7 prepared nickel-base alloy ingot casting surface.
Fig. 3 is the directly photo of the ingot casting end face of cast of tradition.
Fig. 4 is the photo on the surface of vacuum consumable remelting ingot casting.
The specific embodiment
Mode below by embodiment further specifies the present invention, but does not therefore limit the present invention among the described scope of embodiments.Wherein, the preparation method of nickel-base alloy ingot casting is as shown in Figure 1 among each embodiment.
Among the following embodiment, the current generating apparatus in the arcing device is that the model that the special power equipment of Lay Co., Ltd produces is the strong current generator of LEC-30000A.
The good Inconel718 molten steel 2 of 1 ton of vaccum sensitive stove, 1 interior refining is poured in the tundish 3, and its temperature is controlled at 1580 ℃.Connect mold base plate circulating cooling water tank 6, molten steel 2 is made into the mold 5 interior cast that specification is Φ 360*1600mm by the mouth of a river, bottom of tundish 3 to 00Cr25Ni20, be poured rear unlatching arcing device and power is remained on 300KW, by the molten steel 2 in the electric arc heated mold between non-consumable electrode 4 two ends at mold top, molten steel 2 from bottom to top directional solidification forms ingot casting, and makes the ingot casting feeding abundant.The electric arc heated time is 55 minutes.Close arcing device, the demoulding after the ingot casting cooling makes the nickel-base alloy Inconel718 ingot casting without the surface texture defective, sees Fig. 1.
Embodiment 2 produces GH3128 nickel-base alloy ingot casting
The good GH3128 molten steel 2 of 1.5 tons of vaccum sensitive stoves, 1 interior refining is poured in the tundish 3, and the control temperature is at 1600 ℃.Connect mold base plate circulating cooling water tank 6, molten steel 2 is the mold 5 interior cast of Φ 320*1300mm to the specification that is made with 00Cr25Ni20 by the mouth of a river, bottom of tundish 3, be poured rear unlatching arcing device and power is remained on 200KW, by the molten steel 2 in the electric arc heated mold between non-consumable electrode 4 two ends at mold top, molten steel 2 from bottom to top directional solidification forms ingot casting, and makes the ingot casting feeding abundant.The electric arc heated time is 40 minutes.Close arcing device, the demoulding after the ingot casting cooling makes the GH3128 high temperature alloy ingot casting without the surface texture defective, same Fig. 1.
NC30Fe (Inconel690) molten steel 2 that the 1 interior refining of 1 ton of vaccum sensitive stove is good is poured in the tundish 3, and its temperature is controlled at 1700 ℃.Connect the circulating cooling water tank 6 of mold base plate, molten steel 2 is the mold 5 interior cast of Φ 360*1600mm to the specification that is made with 00Cr25Ni20 by the mouth of a river, bottom of tundish 3, be poured rear unlatching arcing device and power is remained on 280KW, by the molten steel in the electric arc heated mold between non-consumable electrode 4 two ends at mold top, molten steel 2 from bottom to top directional solidification forms ingot casting, and makes the ingot casting feeding abundant.The electric arc heated time is 70 minutes.Close arcing device, the demoulding after the ingot casting cooling makes nickel-base alloy NC30Fe (Inconel690) ingot casting without the surface texture defective, same Fig. 1.
Embodiment 4 produces nickel-base alloy Inconel625 ingot casting
The good Inconel625 molten steel 2 of 1 ton of vaccum sensitive stove, 1 interior refining is poured in the tundish 3, and its temperature is controlled at 1600 ℃.Connect mold base plate circulating cooling water tank 6, molten steel 2 is the mold 5 interior cast of Φ 360*1600mm to the specification that is made with 00Cr25Ni20 by the mouth of a river, bottom of tundish 3, be poured rear unlatching arcing device and power is remained on 220KW, by the molten steel 2 in the electric arc heated mold between non-consumable electrode 4 two ends at mold top, molten steel 2 from bottom to top directional solidification forms ingot casting, and makes the ingot casting feeding abundant.The electric arc heated time is 60 minutes.Close arcing device, the demoulding after the ingot casting cooling makes the nickel-base alloy Inconel625 ingot casting without the surface texture defective, same Fig. 1.
Embodiment 5 produces nickel-base alloy Inconel600 ingot casting
The good Inconel600 molten steel 2 of 1 ton of vaccum sensitive stove, 1 interior refining is poured in the tundish 3, and its temperature is controlled at 1620 ℃.Connect mold base plate circulating cooling water tank 6, molten steel 2 is made into the mold 5 interior cast that specification is Φ 360*1600mm by the mouth of a river, bottom of tundish 3 to 00Cr25Ni20, be poured rear unlatching arcing device and power is remained on 260KW, by the molten steel 2 in the electric arc heated mold between non-consumable electrode 4 two ends at mold top, molten steel 2 from bottom to top directional solidification forms ingot casting, and makes the ingot casting feeding abundant.The electric arc heated time is 55 minutes.Close arcing device, the demoulding after the ingot casting cooling makes the nickel-base alloy Inconel600 ingot casting without the surface texture defective, same Fig. 1.
Embodiment 6 produces GH3030 nickel-base alloy ingot casting
The good GH3030 molten steel 2 of 1.5 tons of vaccum sensitive stoves, 1 interior refining is poured in the tundish 3, and the control temperature is at 1650 ℃.Connect mold base plate circulating cooling water tank 6, molten steel 2 is the mold 5 interior cast of Φ 600*1800mm to the specification that is made with 00Cr25Ni20 by the mouth of a river, bottom of tundish 3, be poured rear unlatching arcing device and power is remained on 300KW, by the molten steel 2 in the electric arc heated mold between non-consumable electrode 4 two ends at mold top, molten steel 2 forms ingot casting from lower from upper directional solidification, and makes the ingot casting feeding abundant.The electric arc heated time is 90 minutes.Close arcing device, the demoulding after the ingot casting cooling makes the GH3030 high temperature alloy ingot casting without the surface texture defective, same Fig. 1.
Embodiment 7 produces Hastelloy C276 nickel-base alloy ingot casting
The Hastelloy C276 molten steel 2 that the 1 interior refining of 1.5 tons of vaccum sensitive stoves is good is poured in the tundish 3, and the control temperature is at 1500 ℃.Connect mold base plate circulating cooling water tank 6, molten steel 2 is the mold 5 interior cast of Φ 300*1300mm to the specification that is made with 00Cr25Ni20 by the mouth of a river, bottom of tundish 3, be poured rear unlatching arcing device and power is remained on 150KW, by the molten steel 2 in the electric arc heated mold between non-consumable electrode 4 two ends at mold top, molten steel 2 from bottom to top directional solidification forms ingot casting, and makes the ingot casting feeding abundant.The electric arc heated time is 30 minutes.Close arcing device, the demoulding after the ingot casting cooling makes the Hastelloy C276 high temperature alloy ingot casting without the surface texture defective, same Fig. 1.
The ingot casting that traditional casting and vacuum consumable remelting process in the ingot casting of embodiment 1～7 gained and the prior art are made compares, and sees Fig. 2～4.As seen from Figure 2, the ingot casting surface inorganization defective that the present invention is prepared, there is obvious thick shrinkage cavity (Fig. 3) on the ingot casting surface that traditional casting makes, and there is very dark tissue defects (Fig. 4) on the ingot casting surface that the vacuum consumable remelting process makes.Prove thus, nickel-base alloy ingot casting preparation method of the present invention can prepare in the ingot casting technology secondary remelting and waste a large amount of man-hours, consume in the situation of the defectives such as a large amount of auxiliary material and electric energy overcoming existing nickel-base alloy, prepare crystalline state good, without the nickel-base alloy ingot casting of surface texture defective.
Claims (10)
1. the preparation method of a nickel-base alloy ingot casting, it comprises the steps:
The nickel-base alloy molten steel is cast in the mold, adopts arcing device to heat molten steel in this mold, heat complete after, cool off to get ingot casting, get final product; Wherein, the pair of electrodes in the described arcing device is non-consumable electrode; Described non-consumable electrode is positioned at the top of this mold; Described mold base plate is a cooling water tank.
2. preparation method as claimed in claim 1 is characterized in that, described nickel-base alloy is the highest alloy of nickel content in the chemical composition; Being preferably the trade mark is the nickel-base alloy of Inconel625, Inconel690, Inconel718, GH3030, GH3128, Inconel600,254SMO, Incoloy825 or Hastelloy C276.
3. preparation method as claimed in claim 1 is characterized in that, the pouring temperature of described nickel-base alloy molten steel is 1500 ℃～1700 ℃.
4. preparation method as claimed in claim 1 is characterized in that, described mold is higher than 800 ℃ heat resisting steel by heat resisting temperature and makes; Be that the heat resisting steel of 00Cr25Ni20,2Cr23Ni13,2Cr25Ni20,1Cr16Ni35,0Cr18Ni9 or 0Cr23Ni13 is made by the trade mark preferably.
5. such as the described preparation method of claim 1～4, it is characterized in that described non-consumable electrode is positioned at the upper surface of described mold, and be centrosymmetric with respect to the center of this upper surface.
6. preparation method as claimed in claim 5 is characterized in that, the heating power of described arcing device is 150KW～500KW; Preferably be 150KW～300KW; Be 30～90 minutes the heat time heating time of described arcing device.
7. preparation method as claimed in claim 1 is characterized in that, the volume of described mold is 0.092 cubic metre～0.51 cubic metre.
8. such as each described preparation method of claim 1～7, it is characterized in that, the nickel-base alloy molten steel that the vacuum induction furnace refining is good is poured in tundish, from the mouth of a river, described tundish bottom described nickel-base alloy molten steel is cast in the described mold, adopt described arcing device to heat the interior molten steel of this mold, heat complete after, cool off to get described ingot casting; Wherein, the temperature in the described tundish preferably is 1500 ℃～1700 ℃.
9. nickel-base alloy ingot casting, it is made by each described preparation method of claim 1～8.
10. nickel-base alloy ingot casting as claimed in claim 9, it is characterized in that described nickel-base alloy ingot casting is that the trade mark is the nickel-base alloy ingot casting of Inconel625, Inconel690, Inconel718, GH3030, GH3128, Inconel600,254SMO, Incoloy825 or Hastelloy C276.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111575536A (en) * | 2020-05-28 | 2020-08-25 | 江苏隆达超合金航材有限公司 | Nickel-based high-temperature alloy with high W, Mo content and preparation method thereof |
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| EP1793007A1 (en) * | 2005-12-05 | 2007-06-06 | The Japan Steel Works, Ltd. | Method for producing unidirectionally solidified hydrogen storage alloy |
| CN101426599A (en) * | 2006-04-25 | 2009-05-06 | 株式会社英比寿 | Casting method and apparatus |
| CN101705392A (en) * | 2009-11-17 | 2010-05-12 | 大连大学 | Toughening ferromagnetic shape memory alloy and preparation method thereof |
| CN101804564A (en) * | 2009-02-16 | 2010-08-18 | 方崇实 | High-efficiency short-flow production line of composite material of high-alloy steel and high-alloy steel |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH077908A (en) * | 1993-01-27 | 1995-01-10 | Bitsugu:Kk | Structure of stepping motor in which crown gear is mounted on magnetic core |
| EP1793007A1 (en) * | 2005-12-05 | 2007-06-06 | The Japan Steel Works, Ltd. | Method for producing unidirectionally solidified hydrogen storage alloy |
| CN101426599A (en) * | 2006-04-25 | 2009-05-06 | 株式会社英比寿 | Casting method and apparatus |
| CN101804564A (en) * | 2009-02-16 | 2010-08-18 | 方崇实 | High-efficiency short-flow production line of composite material of high-alloy steel and high-alloy steel |
| CN101705392A (en) * | 2009-11-17 | 2010-05-12 | 大连大学 | Toughening ferromagnetic shape memory alloy and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111575536A (en) * | 2020-05-28 | 2020-08-25 | 江苏隆达超合金航材有限公司 | Nickel-based high-temperature alloy with high W, Mo content and preparation method thereof |
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