CN108342587A - A kind of stainless Blade Steel electroslag remelting slag - Google Patents
A kind of stainless Blade Steel electroslag remelting slag Download PDFInfo
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- CN108342587A CN108342587A CN201810315528.6A CN201810315528A CN108342587A CN 108342587 A CN108342587 A CN 108342587A CN 201810315528 A CN201810315528 A CN 201810315528A CN 108342587 A CN108342587 A CN 108342587A
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- slag
- electroslag remelting
- blade steel
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- remelting
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/16—Remelting metals
- C22B9/18—Electroslag remelting
Abstract
The present invention discloses a kind of stainless Blade Steel electroslag remelting slag, solves the problems, such as that Ingot Surface Quality is poor and inner clamps sundries rank is high.Above-mentioned purpose is achieved through the following technical solutions：Electro slag remelting slag of the present invention is quaternary slag system, and the raw material of quaternary slag system is made of Fluorspar Powder, alumina powder, lime and magnesia, and raw material is matched by composition by weight percent, and ingredient is after proportioning：CaF2：65%~75%；Al2O3：15%~25%；CaO：5%~10%；MgO：3%~7%.The present invention has the following effects that：Electro slag remelting slag reasonable composition is stablized using process slag system, and the electroslag ingot surface of production is smooth, and inner clamps sundries rank reaches the sum of 9 field trashes of A+B+C+D+DS and is not more than 2.5 grades.
Description
Technical field
The invention belongs to special smelting technical fields, are related to a kind of stainless Blade Steel electroslag remelting slag.
Background technology
Since the alloy content of stainless Blade Steel is higher, containing elements such as chromium, nickel, tungsten, molybdenum, vanadium, it is mingled with after electroslag remelting
Object rank is higher.As steam turbine use environment is more and more just carved, the inclusion behavior of stainless Blade Steel is increasingly stringenter, is had
Stainless Blade Steel inclusion behavior it has been specified that the sum of 9 field trashes of A+B+C+D+DS be not more than 2.5 grades.
It is binary slag system and ternary slag system that stainless Blade Steel, which needs electroslag remelting, common slag system,.Binary slag system i.e. common " three
Seven " slag systems：70% CaF2With 30% Al2O3；" Radix Notoginseng " slag ingredient not on eutectic point, during cooling deposit by slag
In liquation problem, lead to Al in the slag crust first cooled down2O3Too high levels, later stage slag ingredient changes, steady to influence technique
It is fixed, influence surface and the internal soundness of ESR ingot.Ternary slag system is CaF2-CaO-Al2O3Series, the slag system moderate viscosity, has
Stronger desulfurization effect, but the ability for removing steel inclusion is general.
In short, whether binary slag system or ternary slag system, there are electroslag ingot surface matter for the stainless Blade Steel of electroslag remelting
Measure poor, the problem of steel inclusion rank does not reach requirement.
Invention content
The present invention discloses a kind of stainless Blade Steel electroslag remelting slag, can overcome the deficiencies in the prior art, solve steel
Ingot surface is second-rate and the high problem of inner clamps sundries rank, smelting produce surface quality and the good steel ingot of internal soundness.
Above-mentioned purpose is achieved through the following technical solutions：
Electro slag remelting slag of the present invention is quaternary slag system, and the raw material of quaternary slag system is by Fluorspar Powder, alumina powder, lime and oxidation
Magnesium forms, and raw material is matched by composition by weight percent, and ingredient is after proportioning：
CaF2：65%~75%,
Al2O3：15%~25%,
CaO：5%~10%,
MgO：3%~7%；
Calcirm-fluoride is mainly the viscosity for reducing slag system, improves the surface tension of slag liquid, removes steel inclusion.In pomace
Calcium Fluoride Content is less than 65%, removes steel inclusion scarce capacity；If Calcium Fluoride Content is higher than 75% in pomace, slag liquid viscosity
It is low, so that the surface of steel ingot is generated skin lamination defect, therefore calcirm-fluoride component selection 65%~75%.
Alundum (Al2O3) is mainly the resistance for improving slag system, increases the viscosity of slag system.If alundum (Al2O3) is higher than 25%,
The slag crust of formation is thicker, and surface of steel ingot can form slag runner, or even will produce slag inclusion；If alundum (Al2O3) is less than 15%, slag
The resistance of system is too small, and power consumption increases, therefore the component selection 15%~25% of alundum (Al2O3).
Calcium oxide is little to the viscosity influence of slag system, can increase the basicity of slag, improves desulfuration efficiency.If calcium oxide is higher than
10%, it since the water absorption rate of calcium oxide is stronger, easily brings hydrogen and oxygen into, causes steel ingot hydrogenation oxygenation, influence inclusion behavior；If
Calcium oxide is less than 5%, can not ensure the desulfurization effect of electroslag remelting, therefore the component selection 5%~10% of calcium oxide.
Magnesia forms the film of one and half solidifications in slag, plays the role of preventing gas from entering molten steel.If magnesia
Higher than 7%, increase the viscosity of slag system, surface of steel ingot can form chase；If magnesia is less than 3%, prevent gas from entering molten steel
Ability decline, influence inclusion behavior, therefore the component selection 3%~7% of magnesia.
Calcirm-fluoride in the used Fluorspar Powder of the present invention is not less than 98%, and the alundum (Al2O3) in aluminium oxide is not less than
98%, the calcium oxide in lime is not less than 95%, and the magnesia in raw materials of magnesium oxide is not less than 98%.
The present invention has the following effects that：Electro slag remelting slag reasonable composition is stablized using process slag system, the ESR ingot of production
Surface is smooth, and inner clamps sundries rank reaches the sum of 9 field trashes of A+B+C+D+DS and is not more than 2.5 grades.
Description of the drawings
Fig. 1 is ESR ingot surface picture.
Specific embodiment
The present invention is illustrated with reference to the drawings and specific embodiments.
Each constituent element weight percent of slag system such as table 1 in embodiment 1, embodiment 2 and embodiment 3.
Table 1
| Embodiment | CaF2 | Al2O3 | CaO | MgO |
| 1 | 65% | 23% | 8% | 4% |
| 2 | 73% | 15% | 7% | 5% |
| 3 | 70% | 18% | 6% | 6% |
It is as follows：
The first step produces electroslag remelting consutrode using " electric furnace+refining " smelting mode, and electrode specification isElectrode chemical analysis and weight percent meet the requirement of table 2.
Table 2
Second step, slag charge total weight are 130kg, and quaternary slag system is placed in electric furnace, and temperature is controlled at 650 DEG C, is dried
Roasting 6h.
Third walks, and baked slag charge is added in crystallizer, and striking slag making obtains liquid slag bath, and the slugging time is
50min~60min ensures that slag system melts, changes clearly.
4th step moves to preheated consutrode in liquid slag bath, starts electroslag remelting.
5th step, by ESR ingot Slow cooling, avoid it is cooling it is too fast crack, ESR ingot specification is
Compliance test result：
It after remelting, tests to ESR ingot surface quality, electroslag ingot surface is smooth, no slag runner, pit, slag inclusion etc.
Defect is shown in Fig. 1.
After ESR ingot forging is become a useful person, graded to the serious visual field non-metallic inclusion of steel according to ASTM E45 standards,
It the results are shown in Table 2：
Table 2
As can be seen from Table 2, the sum of 9 field trashes of A+B+C+D+DS of steel are 2.0 grades~2.5 grades after electroslag remelting, reach
The sum of 9 field trashes of A+B+C+D+DS are not more than 2.5 grades of requirement.
Claims (2)
1. a kind of stainless Blade Steel electroslag remelting slag, it is characterised in that：The slag system uses quaternary slag, weight percent
For：CaF2：65%~75%；Al2O3：15%~25%；CaO：5%~10%；MgO：3%~7%.
2. a kind of stainless Blade Steel electroslag remelting slag according to claim 1, it is characterised in that：The raw material of the quaternary slag
For Fluorspar Powder, alumina powder, lime and magnesia, the calcirm-fluoride in Fluorspar Powder is not less than 98%, three oxidations two in aluminium oxide
Aluminium is not less than 98%, and the calcium oxide in lime is not less than 95%, and the magnesia in raw materials of magnesium oxide is not less than 98%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810315528.6A CN108342587A (en) | 2018-04-10 | 2018-04-10 | A kind of stainless Blade Steel electroslag remelting slag |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810315528.6A CN108342587A (en) | 2018-04-10 | 2018-04-10 | A kind of stainless Blade Steel electroslag remelting slag |
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| CN108342587A true CN108342587A (en) | 2018-07-31 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109112319A (en) * | 2018-09-18 | 2019-01-01 | 重庆材料研究院有限公司 | Slag charge for nuclear grade stainless steel electroslag remelting and the method using slag charge progress electroslag remelting |
| CN109609810A (en) * | 2018-11-26 | 2019-04-12 | 抚顺特殊钢股份有限公司 | 825 corrosion resistant alloy super-large diameter bar manufacturing methods |
| CN112458304A (en) * | 2020-11-02 | 2021-03-09 | 抚顺特殊钢股份有限公司 | Electroslag remelting slag system for smelting ultra-low-carbon low-aluminum high-titanium maraging steel |
| CN112831668A (en) * | 2020-12-03 | 2021-05-25 | 成都先进金属材料产业技术研究院有限公司 | G20CrNi2Electroslag remelting slag system of Mo alloy and application thereof |
| CN114635071A (en) * | 2020-12-16 | 2022-06-17 | 宝武特种冶金有限公司 | Smelting method of martensite heat-resistant steel |
| JP7471520B2 (en) | 2021-12-16 | 2024-04-19 | 大冶特殊鋼有限公司 | Manufacturing method for low carbon nitrogen containing austenitic stainless steel rod |
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| CN100999806A (en) * | 2006-12-31 | 2007-07-18 | 许季祥 | High performance corrosion-proof rare earth super strength dual-phase stainless steel and its smelting tech. |
| CN101705362A (en) * | 2009-11-26 | 2010-05-12 | 攀钢集团江油长城特殊钢有限公司 | Electroslag remelting quaternary slag system for preparing high-purity stainless steel |
| CN102304624A (en) * | 2010-06-04 | 2012-01-04 | 辽宁天和科技股份有限公司 | Remelting slag for electroslag remelting plate blank and manufacturing method thereof |
| CN102407321A (en) * | 2010-09-21 | 2012-04-11 | 鞍钢股份有限公司 | Electro slag remelting slag and manufacturing method thereof |
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| CN102912151A (en) * | 2012-11-23 | 2013-02-06 | 重庆材料研究院 | Ultra pure electroslag remelting method for high-performance corrosion resistant alloy |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100999806A (en) * | 2006-12-31 | 2007-07-18 | 许季祥 | High performance corrosion-proof rare earth super strength dual-phase stainless steel and its smelting tech. |
| CN101705362A (en) * | 2009-11-26 | 2010-05-12 | 攀钢集团江油长城特殊钢有限公司 | Electroslag remelting quaternary slag system for preparing high-purity stainless steel |
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| CN102912151A (en) * | 2012-11-23 | 2013-02-06 | 重庆材料研究院 | Ultra pure electroslag remelting method for high-performance corrosion resistant alloy |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109112319A (en) * | 2018-09-18 | 2019-01-01 | 重庆材料研究院有限公司 | Slag charge for nuclear grade stainless steel electroslag remelting and the method using slag charge progress electroslag remelting |
| CN109609810A (en) * | 2018-11-26 | 2019-04-12 | 抚顺特殊钢股份有限公司 | 825 corrosion resistant alloy super-large diameter bar manufacturing methods |
| CN112458304A (en) * | 2020-11-02 | 2021-03-09 | 抚顺特殊钢股份有限公司 | Electroslag remelting slag system for smelting ultra-low-carbon low-aluminum high-titanium maraging steel |
| CN112831668A (en) * | 2020-12-03 | 2021-05-25 | 成都先进金属材料产业技术研究院有限公司 | G20CrNi2Electroslag remelting slag system of Mo alloy and application thereof |
| CN114635071A (en) * | 2020-12-16 | 2022-06-17 | 宝武特种冶金有限公司 | Smelting method of martensite heat-resistant steel |
| JP7471520B2 (en) | 2021-12-16 | 2024-04-19 | 大冶特殊鋼有限公司 | Manufacturing method for low carbon nitrogen containing austenitic stainless steel rod |
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