CN106591591B - Electroslag remelting solid slag striking agent and its starting the arc method - Google Patents
Electroslag remelting solid slag striking agent and its starting the arc method Download PDFInfo
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- CN106591591B CN106591591B CN201710025154.XA CN201710025154A CN106591591B CN 106591591 B CN106591591 B CN 106591591B CN 201710025154 A CN201710025154 A CN 201710025154A CN 106591591 B CN106591591 B CN 106591591B
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- starting
- slag
- electroslag remelting
- solid slag
- striking agent
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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 invention discloses a kind of electroslag remelting solid slag striking agent and its starting the arc method, by following mass percentages into being grouped into：Fritting slag particle 3~5%, aluminum shot 0.3~0.5%, surplus are iron filings.The striking agent of this solid slag uses iron filings as primary raw material, and machining waste material iron filings can be used and carry out waste reclamation, at low cost, non-secondary pollution realizes discarded recycling；And it economizes on resources, greatlys save cost, eliminate the possibility of environmental pollution.This method has the features such as easy to operate, process is stablized, and success rate is high.
Description
Technical field
The invention belongs to electroslag remelting technique field, especially a kind of electroslag remelting solid slag striking agent and its starting the arc method.
Background technology
Electroslag remelting is one refined again in water mold the steel or alloy being smelt with general smelting process
Kind metallurgical method.Electroslag striking method has two kinds of the solid slag starting the arc and the melt cinder starting the arc, and solid slag starting the arc agent generally uses CaF2+TiO2Matter
Pre- frit, by CaF2Powder and TiO2Powder is broken into fritter through high melt postcooling, and cost of manufacture is up to 10 yuan/kg, while
Melting and it is broken when environment easy to pollute.
TiO2Matter striking agent itself is frangible, it is impossible to, can only be in stationary furnace hair style electroslag in shove charge by consutrode feeler inspection
Stove uses.TiO2Also it is unstable oxide, steel ingot is easily caused to increase Ti, therefore the striking agent can only smelt the higher steel of titaniferous
Kind.Patent application 201610020094.8 discloses a kind of electroslag remelting striking agent and striking method, but the striking agent needs specially
Door makes, it is desirable that and it is higher, and complex process.
In addition, in the existing electroslag remelting starting the arc, substantially using manual mode, arcing voltage commonly reaches 40~55V, electricity
For flow control by 0~5000A, easy arc extinguishing and impact bottom water tank copper coin, current fluctuation are big.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of electroslag remelting solid slag striking agent of low cost；The present invention also carries
A kind of electroslag remelting solid slag starting the arc method simple for process is supplied.
In order to solve the above technical problems, the present invention by following mass percentages into being grouped into：Fritting slag particle 3~5%,
Aluminum shot 0.3~0.5%, surplus are iron filings.
Substance≤1g of iron filings of the present invention, granularity≤1mm of fritting slag particle, substance≤1g of aluminum shot.
Preferably, the fritting slag particle amount is 5%, and aluminum shot amount is 0.5%.
The method of the present invention, using above-mentioned solid slag striking agent, the method technique is：20~30V of arcing voltage, electric current 2000
~3500A.
After 5~10s of the starting the arc described in the method for the present invention, slag charge is added in electroslag furnace.
It is using advantageous effect caused by above-mentioned technical proposal：The present invention uses iron filings to can be used for primary raw material
It machines waste material iron filings and carries out waste reclamation, at low cost, non-secondary pollution realizes discarded recycling；And save money
Source greatlys save cost, eliminates the possibility of environmental pollution.
The method of the present invention has the features such as easy to operate, process is stablized, and success rate is high.
Specific embodiment
With reference to specific embodiment, the present invention is described in further detail.
The solid slag striking agent of this electroslag remelting is mixed by iron filings, fritting slag particle and aluminum shot.Single iron filings grain is iron filings again
Substance≤1g, mach waste material iron filings can be used after de-oiling drying is broken.The chemical composition of fritting slag particle and smelting
It is consistent with slag during refining, granularity≤1mm；The starting the arc is difficult when the content of fritting slag particle is 5wt%~10wt%, and less than 3wt% when easily rushes
Bottom water tank is hit, therefore the content of fritting slag particle is 3wt%~5wt%, preferably 5wt%.The removing groove that is added to of aluminum shot adds
The iron scale that man-hour iron filings surface layer generates, aluminum shot content easily makes steel ingot increase aluminium when being more than 0.5wt%, during less than 0.3wt%
Bubble is easily generated in ingot casting bottom, therefore the content of aluminum shot is 0.3wt%~0.5wt%, preferably 0.5wt%；The substance of aluminum shot≤
1g。
This electroslag remelting solid slag starting the arc method uses following techniques：（1）To consutrode retaining wall on slope, to be soldered to vacation
On electrode；Generating waste iron filing during finished edge can be as the ingredient of this solid slag striking agent.
（2）Dummy plate is put on the water tank copper coin of bottom, above-mentioned solid slag striking agent is placed above, paves.
（3）Crystallizer is installed, from Mao electrodes, a forearc will be dropped to from Mao electrodes apart from striking agent 15mm~40mm, if
Determine starting the arc technological parameter, 20~30V of voltage, 2000~3500A of electric current.
（4）Automatic arc striking starts automatic slag adding machine after hearing arc sound or seeing 5~10s of arc light, adds in electroslag furnace
Enter slag charge.
（5）Enter the stages such as normal slugging, melting after adding slag, until melting terminates.Whole process is controlled by computer,
Without Human disturbance.
Embodiment 1：The solid slag striking agent of this electroslag remelting and its starting the arc method use following concrete technologies.
Equipment uses 500kg electroslag furnace under protective Ar gas stoves, crystallizer specification φ 300*1300mm, consutrode specification φ 210*
1800mm, material are high temperature alloy Inconel718.
Striking agent matches：94.5wt% iron filings, Single seed weight≤0.8g；5wt% pre-melted slags, granularity≤0.6mm；0.5wt% aluminium
Grain, Single seed weight≤0.6g；Striking agent weight is 1kg, height 20mm.
Playing forearc will drop to from Mao electrodes apart from striking agent 20mm~30mm；Starting the arc technological parameter：Voltage 20V, electric current
3000A；After starting the arc 8s, slag charge is added in electroslag furnace.
Table 1 is the Inconel718 base material compositions of the present embodiment and smelting finished product ingredient.
Table 1：Inconel718 component requirements and smelting finished product ingredient（wt%）
| Element | C | Mn | Si | Ni | Cr | Mo | Ti | Al | Nb |
| Base material composition | 0.07 | 0.05 | 0.05 | 50 | 17 | 2.80 | 1.00 | 0.35 | 5.30 |
| ESR ingot bottom ingredient | 0.07 | 0.05 | 0.05 | 50 | 17 | 2.80 | 0.99 | 0.35 | 5.30 |
In table 1, ingredient surplus is Fe and inevitable impurity.
Embodiment 2：The solid slag striking agent of this electroslag remelting and its starting the arc method use following concrete technologies.
Equipment uses 1t electroslag furnace under protective Ar gas stoves, crystallizer specification φ 400*1300mm, consutrode specification φ 280*
1800mm, material H13.
Striking agent matches：96.6wt% iron filings, Single seed weight≤1g；3wt% pre-melted slags, granularity≤1mm；0.4wt% aluminum shots,
Substance≤1g；Striking agent weight is 1.5kg, height 25mm.
Playing forearc will drop to from Mao electrodes apart from striking agent 30mm~40mm；Starting the arc technological parameter：Voltage 30V, electric current
3500A；After starting the arc 10s, slag charge is added in electroslag furnace.
Table 2 is the H13 base material compositions of the present embodiment and smelting finished product ingredient.
Table 2：H13 component requirements and smelting finished product ingredient（wt%）
| Element | C | Si | Mn | P | S | Cr | Mo | V | Al（s） |
| Base material composition | 0.38 | 1.25 | 0.58 | 0.016 | 0.009 | 4.79 | 1.34 | 1.1 | 0.07 |
| ESR ingot bottom ingredient | 0.38 | 1.25 | 0.58 | 0.021 | 0.001 | 4.79 | 1.33 | 1.09 | 0.07 |
In table 2, ingredient surplus is Fe and inevitable impurity.
Embodiment 3：The solid slag striking agent of this electroslag remelting and its starting the arc method use following concrete technologies.
Equipment uses 50kg electroslag furnace under protective Ar gas stoves, crystallizer specification φ 130*800mm, consutrode specification φ 80*
1200mm, steel grade 26NiCrMoV14-5.
Striking agent matches：95.7wt% iron filings, Single seed weight≤0.6g；4wt% pre-melted slags, granularity≤0.9mm；0.3wt% aluminium
Grain, Single seed weight≤0.5g；Striking agent weight is 100g, height 15mm.
Playing forearc will drop to from Mao electrodes apart from striking agent 15mm~20mm；Starting the arc technological parameter：Voltage 25V, electric current
2000A；After starting the arc 5s, slag charge is added in electroslag furnace.
Table 3 is the 26NiCrMoV14-5 base materials and product composition of the present embodiment.
Table 3：26NiCrMoV14-5 base materials and product composition（wt%）
| Element | C | Si | Mn | Cr | Mo | Ni | V | Al |
| Base material composition | 0.269 | 0.01 | 0.03 | 1.76 | 0.44 | 3.4 | 0.11 | 0.008 |
| At the top of ESR ingot | 0.26 | 0.006 | 0.02 | 1.73 | 0.44 | 3.4 | 0.09 | 0.007 |
In table 3, ingredient surplus is Fe and inevitable impurity.
Claims (4)
1. a kind of electroslag remelting solid slag striking agent, which is characterized in that it is by following mass percentages into being grouped into：Pre-melted slag
Grain 3~5%, aluminum shot 0.3~0.5%, surplus is iron filings；Substance≤1g of the iron filings, granularity≤1mm of fritting slag particle, aluminum shot
Substance≤1g.
2. electroslag remelting solid slag striking agent according to claim 1, it is characterised in that：The fritting slag particle amount is 5%, aluminium
Grain amount is 0.5%.
3. a kind of electroslag remelting solid slag starting the arc method, special using the electroslag remelting solid slag striking agent described in claim 1 or 2
Sign is that the method technique is：20~30V of arcing voltage, 2000~3500A of electric current.
4. electroslag remelting solid slag starting the arc method according to claim 3, it is characterised in that：After 5~10s of the starting the arc, toward electroslag
Slag charge is added in stove.
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| CN109487091B (en) * | 2019-01-11 | 2020-09-22 | 辽宁科技大学 | Electroslag remelting arc striking agent and preparation method thereof |
| CN111621647A (en) * | 2020-05-25 | 2020-09-04 | 河南中原特钢装备制造有限公司 | Smelting process for controlling aluminum increase at tail end of electroslag ingot in electroslag remelting process |
| CN113832352A (en) * | 2021-08-16 | 2021-12-24 | 河南中原特钢装备制造有限公司 | Electroslag process for controlling ingot tail defects of electroslag ingot |
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| CN103008621B (en) * | 2012-12-26 | 2015-04-01 | 中国科学院金属研究所 | Process for industrially producing ultrapure Inconel 690 (I-690) alloy electroslag remelting ingot of 3 tons |
| CN104152710B (en) * | 2014-08-28 | 2016-04-13 | 攀钢集团成都钢钒有限公司 | The smelting process of esr refining slag and application thereof |
| CN105603203B (en) * | 2016-01-22 | 2017-12-01 | 东北大学 | A kind of method of raising Mn18Cr18N steel hot-working characters |
| CN105925916B (en) * | 2016-06-24 | 2017-11-03 | 东北大学 | A kind of method of calcium aluminium nitrogen pick-up deoxidation during electroslag remelting high nitrogen steel of pressurizeing |
| CN106011371B (en) * | 2016-06-24 | 2018-06-22 | 东北大学 | A kind of method of pressurize sensing and pressurization electroslag remelting duplex smelting high-nitrogen steel |
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