CN101586195A - Method for manufacturing hollow consumable electrode for high nitrogen steel production - Google Patents
Method for manufacturing hollow consumable electrode for high nitrogen steel production Download PDFInfo
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- CN101586195A CN101586195A CNA200910148756XA CN200910148756A CN101586195A CN 101586195 A CN101586195 A CN 101586195A CN A200910148756X A CNA200910148756X A CN A200910148756XA CN 200910148756 A CN200910148756 A CN 200910148756A CN 101586195 A CN101586195 A CN 101586195A
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Abstract
The invention relates to a consumable electrode for remelting, in particular to a method for manufacturing hollow consumable electrode for high nitrogen steel production, comprising: casting alloyed molten steel or directly rolling alloyed steel billet into a semicircular steel billet, which is provided with a small semicircular groove at the centre of the plane side thereof; placing an ordinary steel tube, one end of which is aligned with the semicircular steel billet, and the other end of which stretches out of the semicircular steel billet and is fixedly welded with the semicircular steel billet, in the groove of the steel billet; placing a second semicircular steel billet on the semicircular steel billet, which have the same dimension, wherein the semicircular groove of the second semicircular steel billet is corresponding to the protruded steel tube; and welding the two aligned steel billets together to form the hollow consumable electrode by combination. The combined hollow consumable electrode has simple manufacturing process and batch production, is important to high nitrogen steel production by remelting electric arc residues with hollow consumable electrodes and promotes the exploiting and production development of high nitrogen steel production by remelting electric arc residues at home.
Description
Technical field
The present invention relates to a kind of remelting consumable electrode, relate in particular to a kind of electric arc residues remelting and produce the making method of high nitrogen steel with hollow consumable electrode.
Background technology
The anxiety of stainless steel raw material resources and the hysteresis of new varieties are restricting the Sustainable development of Chinese stainless steel industry.China is the country of the few nickel of a scarce chromium, and the stainless steel raw material resources are very in short supply, becomes the bottleneck of a large amount of development tradition austenitic stainless steels.Enterprise must step up to develop and produce the stainless steel new variety of few nickel, no nickel.High nitrogen steel has high strength, good toughness, anti-uniform corrosion, anti-local corrosion (as spot corrosion, crevice corrosion etc.) performance, and excellent performance beyond any doubt.The adding of nitrogen is the difficult point place in the smelting process.Nitrogen is unique gas alloying element, also is the most cheap alloying element, for nickel, is a new technology of primary study exploitation during nitrogenous steel is produced with nitrogen.The metallurgical equipment owing to do not pressurize, the research and development of domestic high nitrogen steel has been subjected to very big restriction.
Esr process is one of main method of producing at present high nitrogen steel, the domestic relevant report that application is also arranged.On this basis, the electric arc residues remelting technology of development abroad is domestic does not see related application report.It is better particularly to inhale the nitrogen effect by the defeated nitrogen method of hollow consumable electrode, and it can carry out under normal pressure also and can carry out adding to depress, and the relevant device of various countries and Technology are maintained secrecy seldom report, needs own the exploitation.Its remelting also is an important step of technological process with hollow consumable electrode, does not see the report of its making method.
Existing remelting consumable electrode is an entity structure, and its production method generally is directly to use the molten steel casting of alloying or the billet rolling of alloying to form.Domestic by retrieval do not have the report of making hollow consumable electrode as yet, and come the production hollow consumable electrode to be difficult to realize with existing remelting with the production method of consumable electrode.
Summary of the invention
The objective of the invention is not have the defective of hollow consumable electrode, the making method that a kind of processing method is simple, the high nitrogen steel of the production of strong operability is used hollow consumable electrode is provided at domestic prior art.
Realize the foregoing invention purpose by the following technical solutions: comprise semicircle steel billet, this programme adopts knockdown method to make hollow consumable electrode, the steps include:
A. the planar side centre of described semicircle steel billet has the small semicircle connected in star;
B. place the common steel tube that feeds nitrogen when being used for remelting in the groove of semicircle steel billet, an end of this common steel tube flushes with semicircle steel billet, and the other end stretches out semicircle steel billet, and fixedlys connected with semicircle steel billet;
C. on semicircle steel billet, place second block of semicircle steel billet identical again with its specification, the small semicircle connected in star of second block of semicircle steel billet is corresponding with the common steel tube of protrusion, the steel billet relative fixed of two same sizes links together, and is combined into the finished product hollow consumable electrode.
Adopt technique scheme, the significant advantage of the present invention is: the combined hollow consumable electrode manufacture craft is simple, can produce in batches, it is to use hollow consumable electrode to carry out the important ring that high nitrogen steel is produced in the electric arc residues remelting, thereby can promote the exploitation and the production development of the high nitrogen steel of domestic electric arc residues remelting.
Description of drawings
Fig. 1 is that the present invention makes up the semicircle steel billet that hollow consumable electrode is used.
Fig. 2 is the semicircle steel billet that is placed with steel pipe.
Fig. 3 is an one-piece construction synoptic diagram of the present invention.
Fig. 4 is the application synoptic diagram of the present invention in the electric arc residues reflow process.
Among the figure, semicircle steel billet 1, essay semi-circular recesses 2, common steel tube 3,4, the second blocks of semicircle steel billets 5 of steel pipe seam, steel billet weld seam 6, power supply 7, nitrogen inlet 8, holding electrode 9, hollow consumable electrode 10, water mold 11, cooling water outlet 12, middle slag 13, metal pool 14, steel ingot 15, entrance of cooling water 16.
Embodiment
The invention will be further described below in conjunction with accompanying drawing
Present embodiment is a kind of making method of producing high nitrogen steel with hollow consumable electrode, the steps include:
See Fig. 1, become semicircle steel billet 1 (alloy content should consider that back step remelting steel tube place need replenish the alloy amount), have small semicircle connected in star 2 in the planar side central position of semicircle steel billet 1 with the molten steel casting of alloying or the billet rolling of alloying.
See Fig. 2, in the small semicircle connected in star 2 of semicircle steel billet 1, place common steel tube 3 (diameter of steel tube is by the decision of nitrogen requirement), one end of common steel tube 3 flushes with semicircle steel billet 1, the other end stretches out outside the semicircle steel billet 1, the contact site spot-welded on of the small semicircle connected in star 2 of common steel tube 3 and semicircle steel billet 1, and leave two alternate steel pipe seams 4.
See Fig. 3, on semicircle steel billet 1, place one and the identical second block of semicircle steel billet 5 of its specification again, the small semicircle connected in star of the planar side central position of second block of semicircle steel billet 5 and the corresponding insertion of common steel tube of protruding outside semicircle steel billet 1, two identical semicircle steel billet 1,5 alignment relative of specification electric welding again weld together, so just be combined into a finished product hollow consumable electrode 7, two alternate steel billet weld seams 6 are left in the both sides of finished product hollow consumable electrode 7.The size of hollow consumable electrode 7 is by processing unit and need the size of founding part to determine.This combined hollow consumable electrode 7 manufacture crafts are simple, can produce in batches, and it is to use hollow consumable electrode 7 to carry out the important step that high nitrogen steel is produced in the electric arc residues remelting, thereby can promote the exploitation and the production development of the high nitrogen steel of domestic electric arc residues remelting.
See Fig. 4, esr process is one of main method of producing at present high nitrogen steel, and has developed electric arc residues remelting technology as shown in Figure 4 on this basis.This technology is produced high nitrogen steel with hollow consumable electrode 7, its technological process is to carry out in that the remelting that is full of using nitrogen gas to seal off is indoor, after connecting power supply 10, the nitrogen of certain flow and pressure is input to charged hollow consumable electrode 7 by nitrogen inlet 8 through holding electrode 9, and deliver to the arc region of hollow consumable electrode 7 lower end central authorities, arc energy is in hollow consumable electrode 7 and 14 stable burnings of metal pool, part nitrogen is in arc region ionization, form the nitrogen plasma arc, improved the thermodynamics and kinetics condition that nitrogen incorporates molten steel greatly.The molten steel of high-temperature electric arc fusing hollow consumable electrode 7 drips abundant absorbed nitrogen like this, and drops onto in the metal pool 14 that is connected with in the water coolant crystallizer 11, and the molten steel of metal pool 14 continues absorbed nitrogen under the effect of remelting slag 13.Water coolant is entered by the entrance of cooling water 16 that is positioned at water mold 11 bottoms, at water mold 11 internal recycle, is discharged by the cooling water outlet 12 that is positioned at water mold 11 tops.Because the cooling effect of water mold 11 walls, the molten steel of nitrogen alloying solidifies rapidly, reduces the effusion of nitrogen to greatest extent.Hollow consumable electrode 7 is melted gradually like this, and metal pool 14 upwards solidifies gradually in the water mold 11, becomes high nitrogen steel ingot 15 with regard to founding.Use electric arc residues remelting technology to produce high nitrogen steel, both can under normal pressure, carry out, also can carry out adding to depress.
More than disclosed be specific embodiments of the invention only, but the present invention is not limited thereto, any those skilled in the art can think variation, all should drop within protection scope of the present invention.
Claims (2)
1, a kind of making method of producing high nitrogen steel with hollow consumable electrode comprises semicircle steel billet, it is characterized in that, adopts combination method to make hollow consumable electrode, the steps include:
A. the planar side centre of described semicircle steel billet has the small semicircle connected in star;
B. place the common steel tube that feeds nitrogen when being used for remelting in the groove of semicircle steel billet, an end of this common steel tube flushes with semicircle steel billet, and the other end stretches out semicircle steel billet, and fixedlys connected with semicircle steel billet;
C. on semicircle steel billet, place second block of semicircle steel billet identical again with its specification, the small semicircle connected in star of second block of semicircle steel billet is corresponding with the common steel tube of protrusion, the steel billet relative fixed of two same sizes links together, and is combined into the finished product hollow consumable electrode.
2, the high nitrogen steel of production according to claim 1 is characterized in that with the making method of hollow consumable electrode, and described semicircle steel billet is the semicircle steel billet that the steel billet with the molten steel casting of alloying or alloying directly is rolled into.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200910148756XA CN101586195A (en) | 2009-07-03 | 2009-07-03 | Method for manufacturing hollow consumable electrode for high nitrogen steel production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200910148756XA CN101586195A (en) | 2009-07-03 | 2009-07-03 | Method for manufacturing hollow consumable electrode for high nitrogen steel production |
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| CN101586195A true CN101586195A (en) | 2009-11-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA200910148756XA Pending CN101586195A (en) | 2009-07-03 | 2009-07-03 | Method for manufacturing hollow consumable electrode for high nitrogen steel production |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103551549A (en) * | 2013-11-14 | 2014-02-05 | 江松伟 | Manufacturing method and manufacturing equipment for seamless tube |
| CN103691908A (en) * | 2013-12-13 | 2014-04-02 | 武汉钢铁(集团)公司 | Fast mutual fusion welding method of consumable electrode and fake electrode of electroslag refining furnace |
| CN107164610A (en) * | 2017-06-07 | 2017-09-15 | 攀钢集团攀枝花钢铁研究院有限公司 | Molten steel increasing method for nitrogen |
-
2009
- 2009-07-03 CN CNA200910148756XA patent/CN101586195A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103551549A (en) * | 2013-11-14 | 2014-02-05 | 江松伟 | Manufacturing method and manufacturing equipment for seamless tube |
| CN103691908A (en) * | 2013-12-13 | 2014-04-02 | 武汉钢铁(集团)公司 | Fast mutual fusion welding method of consumable electrode and fake electrode of electroslag refining furnace |
| CN103691908B (en) * | 2013-12-13 | 2016-01-20 | 武汉钢铁(集团)公司 | The mutual fast melting and welding method of a kind of electroslag refining furnace consutrode and dummy electrode |
| CN107164610A (en) * | 2017-06-07 | 2017-09-15 | 攀钢集团攀枝花钢铁研究院有限公司 | Molten steel increasing method for nitrogen |
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Open date: 20091125 |