CS239017B1 - Rolling mill stands' rolls electrical facing method - Google Patents
Rolling mill stands' rolls electrical facing method Download PDFInfo
- Publication number
- CS239017B1 CS239017B1 CS835853A CS585383A CS239017B1 CS 239017 B1 CS239017 B1 CS 239017B1 CS 835853 A CS835853 A CS 835853A CS 585383 A CS585383 A CS 585383A CS 239017 B1 CS239017 B1 CS 239017B1
- Authority
- CS
- Czechoslovakia
- Prior art keywords
- rolls
- electrical
- electrodes
- rolling mill
- mill stands
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 10
- 238000005096 rolling process Methods 0.000 title 1
- 238000003466 welding Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- -1 1.0 wt% Chemical compound 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C26/00—Coating not provided for in groups C23C2/00 - C23C24/00
- C23C26/02—Coating not provided for in groups C23C2/00 - C23C24/00 applying molten material to the substrate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Arc Welding In General (AREA)
Description
Vynález sa týká speáobu elektrotroskového navárania valcov válcovacích stolíc.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the method of electroslag welding of roll mill rolls.
Doteraz sú z praxe známe viaceré sposoby elektrotroskového navárania valcov válcovacích stolíc. Pri naváraní sa doteraz ako přídavný materiál používali najma dróty, pásové elektrody alebo přídavný materiál bol v tvare rúrky. Pre ' vylepšenie vlastností návaru sa používali droty s rozkyvom alebo rotáciou.To date, several methods of electroslag welding of roll mill rolls have been known in practice. Up to now, wires have been used in the welding process, in particular wires, band electrodes or pipe material. Swing or rotation wires were used to improve the properties of the deposit.
Nevýhodou týchto sposobov bolo, že pri naváraní s rozkyvom sa dostával nerovnoměrný prievar. Drot je citlivý na prúdov© pretaženie a často sa stává, že nie je do návarového kúpela rovnoměrná dodávka tepla.The disadvantage of these methods was that uneven penetration was obtained when welding with a swivel. The wire is sensitive to overcurrent and it often happens that there is no uniform heat supply to the weld bath.
Ďalej sú podstatné rozdiely v taveni dro^tových a pásových elektrod. Kým drotové elektrody sú ponárané hlboko do troškového kúpela, ohrieva sa menší objem trosky ako u pásových elektrod, ktoré sa tavia bezprostředné pri vstupe do Tým aj vzniká charakteristický súdkovitý” resp. budúceho stuhnutého návarového kovu. na maximálně sústredenie tepla do strednej ktrodu.Ï al ej of W a d t n e sta differences in melting dihydro ^ na- ásovýc h and p electrodes. While the wire electrodes are immersed deep into the splash bath, a smaller slag volume is heated than with the electrode strips, which melt immediately at the entrance to it, thus creating a characteristic barrel-shaped ”resp. future solidified weld metal. for maximum heat concentration in the middle trod.
troškového kúpela. tvar kovového kúpela, Z toho možno uaudzovať časti pod pásovú elevýsledkua little bath. the shape of the metal bath. From this the parts can be squeezed under the belt elevation
Rozdiely teda sú v sposobe tavenia elektrod a to znamená vo formě kovového kúpela a a tým aj voThe differences are in the way of melting the electrodes and that is in the form of a metal bath and
Л prievaiti.Л prievaiti.
naváraní s drotmi rotujúcej časti a PodávacieWelding with Wires Rotating Part and Feeder
Pri prudu do dové preťaženie množstve podávaných drotov s rotáciou je nevýhoda v přívode - , . '-ivelká citlivost tenkých drotov na přumechanizmy sú dost poruchové, čo pri nie je zanedbatelné.In the case of sudden overloading of the number of rotating feeds, the disadvantage is in the feed. The very sensitivity of thin wires to pre-mechanisms is quite disturbing, which is not negligible.
Společnou nevýhodou doteraz uvedených sposobov je, že v přechode návaru do základného materiálu móžu vznikat praskliny, ktoré sposobujú znehodnotenie celého návara.A common disadvantage of the above-mentioned methods is that cracks may occur in the transition of the overlay to the base material, causing the entire overlay to deteriorate.
Vyššie uvedené nevýhody sú do značnej miery odstránené sposobom podlá vynálezu, ktorého podstata spočívá v tom, že elektrotroskový návar valca sa vykoná pásovými elektrodami, usporiadanými v kruhu vedla seba, pričom okrem pohybu pásových elektrodThe above-mentioned disadvantages are largely eliminated by the method according to the invention, which is based on the fact that the electrosrosing of the roll is carried out by means of electrodes arranged in a circle next to each other, in addition to the movement of the electrodes.
239 017 jmerom do naváracieho kúpela tieto vykonávajú pohyb vratný rotačný, najmenej vo velkosti šířky rozostupu dvoch susedných pásových elektrod.239 017, except for the weld bath, they perform a reciprocating rotational movement, at least in the spacing width of two adjacent ribbon electrodes.
SpSsobom podlá vynálezu sa dosiahne, že u valcov sa odstráni nerovnoměrný prievar do základného materiálu, ktorý vznikol při technológiách s nerovnoměrným rozdělováním tepla prechodom prúdu z elektrody do návarového kúpela a navářeného telesa. Sposobom podlá vynálezu sa dosiahne odstráenie nerovnoměrného prievaru a súdkovitá forma v miestach pod elektrodami, to znamená, že tým sa odstraňuje přídavné napátie, ktoré sposobujú z titulu nerovnoměrného prievaru praskliny zo superpozici^ napatí a z kontaktnej únavy materiálu.According to the invention, it is achieved that the rollers eliminate the uneven penetration into the base material produced by the uneven heat distribution technologies by passing the current from the electrode to the weld bath and the welded body. The method according to the invention achieves the removal of the uneven seam and the barrel-shaped form at the points beneath the electrodes, i.e., the additional stresses which cause cracks from the superposition of stresses and contact fatigue of the material due to the uneven seam are eliminated.
Spósobom podlá vynálezu bol navařený válec o priemere 450 mm, pričom boli použité pásové elektrody, medzi ktorými boli zachované rozostupy. Pásové elektrody boli zachytané v zariadení na ich posuv, ktoré zabezpečuje ich pohyb smerom do naváracieho kúpela a zároveň pomocou reverzného elektromotore pohyb vratný rotačný a to tak, že tento vykonávaný je najmenej o rozstup^dvoch súsedných elektrod. Navarací prúd bol použitý intenzity 1700 A, napátie 41 V, rýchlosť vratného pohybu bola 40 m/hod.According to the method of the invention, a 450 mm diameter cylinder was welded using band electrodes between which spacing was maintained. The band electrodes have been captured in a displacement device which ensures their movement towards the weld bath and, at the same time, by means of a reverse electric motor, a reciprocating rotary motion such that it is performed at least by a spacing of two adjacent electrodes. The intensity of 1700 A, the voltage of 41 V, the reciprocating speed was 40 m / h.
Takto navařený válec mal hrůbku navarenej vrstvy 60 mm s dosiahnutou tvrdosťou 450 HV pri použití přídavných elektrod o chemickom zložení 0,76 % hmot, uhlíka, 1,0 % hmot, mangánu, 0,8 % hmot, kremíka, 0,96 % hmot, chrómu, maximálně 0,027 ¾ hmot, síry a max. 0,027 % hmot, fosforu, pričom zvyšok je železo.The welded roll had a layer thickness of 60 mm with a hardness of 450 HV achieved by using additional electrodes having a chemical composition of 0.76 wt%, carbon, 1.0 wt%, manganese, 0.8 wt%, silicon, 0.96 wt% , chromium, not more than 0,027 ¾ of mass, sulfur and max. 0.027 wt% phosphorus, the remainder being iron.
Medzi výhody vynálezu patří skutočnosť, že takýmto sposobom možno válce válcovacích stolíc vyrobit a to tak, že na kovové jádro sa vyhotoví návar alebo obnovit u tých valcov, ktoré majú opotřebovaný povrch.Advantages of the invention include the fact that in such a manner the roll stand rolls can be manufactured by welding or restoring the metal core to those rolls having a worn surface.
Claims (1)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS835853A CS239017B1 (en) | 1983-08-09 | 1983-08-09 | Rolling mill stands' rolls electrical facing method |
| BE0/213457A BE900310A (en) | 1983-08-09 | 1984-08-07 | METHOD FOR SURFACING ELECTROLYTIC DAIRY OF ROLLING MILLS. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS835853A CS239017B1 (en) | 1983-08-09 | 1983-08-09 | Rolling mill stands' rolls electrical facing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CS585383A1 CS585383A1 (en) | 1985-05-15 |
| CS239017B1 true CS239017B1 (en) | 1985-12-16 |
Family
ID=5404231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CS835853A CS239017B1 (en) | 1983-08-09 | 1983-08-09 | Rolling mill stands' rolls electrical facing method |
Country Status (2)
| Country | Link |
|---|---|
| BE (1) | BE900310A (en) |
| CS (1) | CS239017B1 (en) |
-
1983
- 1983-08-09 CS CS835853A patent/CS239017B1/en unknown
-
1984
- 1984-08-07 BE BE0/213457A patent/BE900310A/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| CS585383A1 (en) | 1985-05-15 |
| BE900310A (en) | 1984-12-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5362937A (en) | Overlaying of plates | |
| US6127644A (en) | Electroslag surfacing using wire electrodes | |
| US2654015A (en) | Method and apparatus for arc welding using a plurality of electrodes | |
| CS239017B1 (en) | Rolling mill stands' rolls electrical facing method | |
| JPH0630817B2 (en) | Multi-electrode submerged arc welding method | |
| US4413169A (en) | Electro-slag welding process for irregular sections | |
| CA1140640A (en) | Clad welding on an inclined surface | |
| SU419334A1 (en) | METHOD OF MULTI-ELECTRODE SURFACE | |
| SU1660885A1 (en) | Method for arc hard facing | |
| JPS60121076A (en) | Tig welding device | |
| RU2106949C1 (en) | Railway wheel recovering method and apparatus | |
| US935358A (en) | Method of treating steel plates. | |
| JPS5584278A (en) | Shallow penetration submerged arc welding method | |
| EP0548100A1 (en) | Welding electrodes and method | |
| US3431385A (en) | Method of welding | |
| RU31748U1 (en) | Machine for flash butt welding of continuous strip ends | |
| SU1763120A1 (en) | Electric arc surfacing method | |
| US3526749A (en) | Work-in-circuit consumable metal welding | |
| RU2739934C1 (en) | Method of arc-welding in wide-layer surfacing under wear-resistant coating flux onto cylindrical pipe | |
| SU1107414A1 (en) | Method of cathode-ray building-up | |
| Sastre et al. | Hardfacing of Continuous Casting Steel Mill Rolls | |
| SU450670A1 (en) | The method of electroslag welding by melting the mouthpiece | |
| JP4630134B2 (en) | Electrical heating method for steel strip | |
| SU1052356A1 (en) | Method of electroslag welding | |
| SU398369A1 (en) | METHOD OF SURFACE |