CN101974692B - Batch welding electric slag re-melting method for jacking core rods - Google Patents
Batch welding electric slag re-melting method for jacking core rods Download PDFInfo
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- CN101974692B CN101974692B CN2010102650203A CN201010265020A CN101974692B CN 101974692 B CN101974692 B CN 101974692B CN 2010102650203 A CN2010102650203 A CN 2010102650203A CN 201010265020 A CN201010265020 A CN 201010265020A CN 101974692 B CN101974692 B CN 101974692B
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Abstract
The invention relates to a batch welding electric slag re-melting method for jacking core rods, and belongs to the field of electric slag furnace melting processes. The method comprises the following steps of: welding a connecting plate between the jacking core rods and a pseudo electrode, determining the welding position on the connecting plate according to the number and specification of the jacking core rods, trimming the ends of the jacking core rods, keeping the longitudinal welding bead length between the jacking core rods at 130 to 150 millimeters, and keeping the center of each electrode blank vertical to the end face of the pseudo electrode after batch welding; and according to the filling ratio, slag quantity, inter-electrode distance control and power setting parameters in the electric slag re-melting process, selecting a refining slag system for adding in a weight ratio of CaF2: Al3O2: SiO2 of 66: 28: 6 before re-melting, and adding Al-Mn-Si powder composite deoxidizer at intervals of 10 minutes during re-melting. The method realizes a process of batch welding re-melting of multi-electrode blanks in one furnace and effectively controls the easily oxidized elements from being burnt; the electric slag ingot tissue is compact, and the steel is pure so that the jacking core rods are directly converted into products by electric slag re-melting, and reutilization of materials is realized.
Description
Technical field
The present invention relates to a kind of jacking plug group and criticize the assembly welding electro-slag re-melting method, belong to the esr field.
Background technology
The enterprise of present processing and manufacturing thick walled steel tube, its complete processing adopts esr, forging to add the production of jacking forming process.Because jacking plug pure interior degree is low, dense structure's property difference can't directly be used for product, can only use as the furnace charge that returns of steel-making.
Summary of the invention
The object of the present invention is to provide a kind ofly can only directly be used for product as returning the jacking plug that furnace charge uses, realized the utilization again of material, the jacking plug group of cost efficiency is criticized the assembly welding electro-slag re-melting method.
Technical solution: the present invention at first chooses the close jacking plug of chemical ingredients and organizes batch welding as the electrode base; Be provided with web plate between dummy electrode and the plug; At first confirm the web plate center before the assembly welding, the jacking plug is by assembly welding around the mind-set in the web plate, during welding with all plug terminations trim, horizontal positioned; Vertical welding bead length is 130～150mm between plug, and every electrode base center behind the assembly welding keeps vertical with the dummy electrode end face.
Mandrel surface of the present invention evenly scribbles liquid soluble glass, evenly scribbles the Al powder on the liquid soluble glass.
It is following that jacking plug group is criticized assembly welding electro-slag re-melting method step:
1) the consumable electrode base is prepared before the esr: at first choose the close jacking plug of chemical ingredients and organize batch welding as the electrode base; Be provided with web plate between dummy electrode and the plug; At first confirm the web plate center before the assembly welding, the jacking plug is by assembly welding around the mind-set in the web plate, during welding with all plug terminations trim, horizontal positioned; Vertical welding bead length is 130～150mm between plug, and every electrode base center behind the assembly welding keeps vertical with the dummy electrode end face;
2) set starting current 12000-14000A, initial current 23000～25000A, limiting current 26000～28500A, voltage 42～55V, molten speed 11～15kg/min; The feeding phase is set: initial current 19550A～21250A, and electric current lowering speed 170A/min descended 20 minutes, and electric current is adjusted to 10980A～12140A, and electric current descends with 150A/min speed, and reducing to electric current is 0; Voltage setting value 40～45V.Before the remelting, select refining slag system by weight CaF2: AL3O2: SiO2=66: add at 28: 6, the remelting phase is every to add Al-Mn-Si powder composite deoxidant at a distance from 10min.
The present invention has broken through traditional list and has propped up the process method that the electrode base carries out esr, has realized that a stove adopts many electrode base assembly welding groups to criticize the technology of remelting, makes the jacking plug be converted into product through behind the esr, has realized the utilization again of material.The present invention adopts ternary slag system and composite deoxidant and mandrel surface spraying liquid soluble glass and Al powder, and control is prone to the oxidation melting loss of elements effectively; ESR ingot dense structure, steel are pure, each item excellent performance.
Description of drawings
Fig. 1 criticizes assembly welding xsect solder joint synoptic diagram for 6 jacking plugs of the present invention group;
Fig. 2 criticizes assembly welding xsect solder joint synoptic diagram for 18 jacking plugs of the present invention group;
Fig. 3 is the vertical welding bead synoptic diagram of the A-A section of Fig. 2.
Embodiment
Embodiment: choosing the 20t electroslag furnace is example, and according to remelting steel ingot weight, the jacking plug 1 of choosing 6～18 close diameter phi 200～300mm of chemical ingredients is organized as the electrode base and batch is welded into consumable electrode.Between dummy electrode 2 and jacking plug 1, be welded with web plate 3, web plate 3 is selected the thick Q235 steel plate of 50mm for use.At first confirm web plate 3 horizontal direction central positions before the assembly welding; Criticize the diameter of jacking plug 1 then according to group; Confirm that jacking plug 1 can weld jacking plug 1 quantity and position in web plate 3 central positions, according to said method finds out around the welding position of the above jacking plug of the second layer of central position successively.During welding with all jacking plug terminations trim, horizontal positioned and leveling up, select the stainless steel electrode downhand welding for use, 1 vertical welding bead of jacking plug long 4 is 130～150mm, every electrode base center behind the assembly welding is vertical with the maintenance of dummy electrode 2 end faces.
The means of defence of melting loss of elements in the esr process.Earlier with modulus 2.3～2.5, proportion 1.48～1.52g/mm
3Liquid soluble glass evenly brushing utilize dust instrument and compressed air spraying aluminium powder again on jacking plug 1 surface, owing to the cohesive action of water glass, aluminium powder will cover mandrel surface uniformly.The protective layer that forms after the seasoning can effectively suppress to be prone to the scaling loss of elements such as oxidation Si, Mn.
Electroslag remelting process packing ratio, the quantity of slag, interpole gap control and parameters of electric power are set.The area packing ratio of group batch assembly welding consumable electrode and mold is controlled at 0.25～0.32, increases by 10～20kg/t according to the mold and the ESR ingot weight quantity of slag, and interpole gap is controlled at 180～200mm.Begin to set smelting period according to consumable electrode free area circumcircle diameter: starting current 14000A, initial current 24500A, limiting current 28500A, voltage 42～55V, molten speed 11～15kg/min.Set feeding: initial current 20800A, electric current lowering speed 170A/min descended 20 minutes, and electric current is adjusted to 11800A, and electric current descends with 150A/min speed, and reducing to electric current is 0.
Ternary slag system and the composite deoxidant method that is used in esr.Deoxidation protection refining slag system proportioning is by weight being CaF
2: AL
3O
2: SiO
2=66: 28: 6.The remelting phase is every at a distance from 10min adding Al powder 160g, Mn-Si powder 80g, and remelting is every later at a distance from 10min adding Al powder 160g, Ca-Si powder 80g to 4t.
Automatically control monitoring computer, carry out electric slag refusion and smelting according to table 1～table 2 electroslag remelting process parameter input stokehold.
Table 1 current setting value
Table 2 voltage setting value
Claims (2)
1. jacking plug group is criticized the assembly welding electro-slag re-melting method, it is characterized in that, at first chooses the close jacking plug of chemical ingredients and organizes batch welding as the electrode base; Be provided with web plate between dummy electrode and the plug; At first confirm the web plate center before the assembly welding, the jacking plug is by assembly welding around the mind-set in the web plate, during welding with all plug terminations trim, horizontal positioned; Vertical welding bead length is 130～150mm between plug, and every electrode base center behind the assembly welding keeps vertical with the dummy electrode end face; Set starting current 12000～14000A, initial current 23000～25000A, limiting current 26000～28500A, voltage 42～55V, molten speed 11～15kg/min; The feeding phase is set: initial current 19550A～21250A, and electric current lowering speed 170A/min descended 20 minutes, and electric current is adjusted to 10980A～12140A, and electric current descends with 150A/min speed, and reducing to electric current is 0; Voltage setting value 40～45V; Before the remelting, select refining slag system by weight CaF
2: Al
3O
2: SiO
2=66: add at 28: 6, the remelting phase is every at a distance from 10min adding Al-Mn-Si powder composite deoxidant.
2. jacking plug group according to claim 1 is criticized the assembly welding electro-slag re-melting method, it is characterized in that mandrel surface evenly scribbles liquid soluble glass, is scribbling the mandrel surface spray Al powder that liquid soluble glass is coated with.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102650203A CN101974692B (en) | 2010-08-23 | 2010-08-23 | Batch welding electric slag re-melting method for jacking core rods |
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| CN2010102650203A CN101974692B (en) | 2010-08-23 | 2010-08-23 | Batch welding electric slag re-melting method for jacking core rods |
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| CN101974692A CN101974692A (en) | 2011-02-16 |
| CN101974692B true CN101974692B (en) | 2012-01-04 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102277501B (en) * | 2011-08-24 | 2013-04-03 | 重庆钢铁(集团)有限责任公司 | Electroslag remelting process for titanium alloy steel |
| CN102978413B (en) * | 2012-12-14 | 2013-11-20 | 烟台台海玛努尔核电设备股份有限公司 | Hundred-ton large-scale three-phase electroslag furnace feeding technique |
| CN103769759B (en) * | 2014-01-08 | 2015-11-25 | 山西太钢不锈钢股份有限公司 | The electroslag furnace method of band cap mouth welding electrode |
| CN104372177B (en) * | 2014-11-17 | 2016-09-28 | 东北大学 | A kind of large-scale alloy pig electroslag remelting tubular type consutrode and preparation method thereof |
| CN108359807A (en) * | 2018-04-03 | 2018-08-03 | 天津赛瑞机器设备有限公司 | The process that the waste and old plugs of H13 recycle |
| CN113174494B (en) * | 2021-04-26 | 2022-10-18 | 钢铁研究总院淮安有限公司 | Manufacturing method of electrode blank for iron-chromium-aluminum alloy electroslag casting |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2570301Y (en) * | 2002-09-26 | 2003-09-03 | 宝钢集团上海五钢有限公司 | Gas-phase closed type protecting equipment of electroslag remelting furnace |
| CN2705467Y (en) * | 2003-12-13 | 2005-06-22 | 内蒙古北方重工业集团有限公司 | Bottom water tank for electric slag resmelting |
| CN2784423Y (en) * | 2005-01-18 | 2006-05-31 | 内蒙古北方重工业集团有限公司 | Crystallizer for electroslag refusion |
| CN101029345A (en) * | 2006-02-28 | 2007-09-05 | 宝山钢铁股份有限公司 | Production of low-phosphor electroslag melt steel |
-
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- 2010-08-23 CN CN2010102650203A patent/CN101974692B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2570301Y (en) * | 2002-09-26 | 2003-09-03 | 宝钢集团上海五钢有限公司 | Gas-phase closed type protecting equipment of electroslag remelting furnace |
| CN2705467Y (en) * | 2003-12-13 | 2005-06-22 | 内蒙古北方重工业集团有限公司 | Bottom water tank for electric slag resmelting |
| CN2784423Y (en) * | 2005-01-18 | 2006-05-31 | 内蒙古北方重工业集团有限公司 | Crystallizer for electroslag refusion |
| CN101029345A (en) * | 2006-02-28 | 2007-09-05 | 宝山钢铁股份有限公司 | Production of low-phosphor electroslag melt steel |
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| CN101974692A (en) | 2011-02-16 |
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