MXPA06001306A - Flux cored electrode with fluorine - Google Patents
Flux cored electrode with fluorineInfo
- Publication number
- MXPA06001306A MXPA06001306A MXPA/A/2006/001306A MXPA06001306A MXPA06001306A MX PA06001306 A MXPA06001306 A MX PA06001306A MX PA06001306 A MXPA06001306 A MX PA06001306A MX PA06001306 A MXPA06001306 A MX PA06001306A
- Authority
- MX
- Mexico
- Prior art keywords
- weight
- fluorine
- silica
- compound
- powder
- Prior art date
Links
- 239000011737 fluorine Substances 0.000 title claims abstract description 56
- 229910052731 fluorine Inorganic materials 0.000 title claims abstract description 56
- YCKRFDGAMUMZLT-UHFFFAOYSA-N fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 title claims abstract description 56
- 230000004907 flux Effects 0.000 title description 14
- 239000000203 mixture Substances 0.000 claims abstract description 106
- 229910052751 metal Inorganic materials 0.000 claims abstract description 65
- 239000002184 metal Substances 0.000 claims abstract description 65
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 55
- 239000002893 slag Substances 0.000 claims abstract description 49
- 150000001875 compounds Chemical class 0.000 claims abstract description 48
- 239000011324 bead Substances 0.000 claims abstract description 31
- 239000000945 filler Substances 0.000 claims description 68
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 60
- 239000000843 powder Substances 0.000 claims description 53
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 52
- 238000003466 welding Methods 0.000 claims description 49
- 239000007789 gas Substances 0.000 claims description 43
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titan oxide Chemical group O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 37
- 229910052742 iron Inorganic materials 0.000 claims description 35
- 239000000377 silicon dioxide Substances 0.000 claims description 34
- 229910001018 Cast iron Inorganic materials 0.000 claims description 24
- 239000011777 magnesium Substances 0.000 claims description 20
- 229910005347 FeSi Inorganic materials 0.000 claims description 19
- 229910005438 FeTi Inorganic materials 0.000 claims description 19
- -1 silica compound Chemical class 0.000 claims description 18
- 229910015136 FeMn Inorganic materials 0.000 claims description 17
- REHXRBDMVPYGJX-UHFFFAOYSA-H Sodium hexafluoroaluminate Chemical compound [Na+].[Na+].[Na+].F[Al-3](F)(F)(F)(F)F REHXRBDMVPYGJX-UHFFFAOYSA-H 0.000 claims description 17
- 229910001610 cryolite Inorganic materials 0.000 claims description 17
- 239000011591 potassium Substances 0.000 claims description 16
- 229910052700 potassium Inorganic materials 0.000 claims description 16
- 229910020440 K2SiF6 Inorganic materials 0.000 claims description 15
- 229910004883 Na2SiF6 Inorganic materials 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 15
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 15
- KEAYESYHFKHZAL-UHFFFAOYSA-N sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 claims description 15
- 239000011734 sodium Substances 0.000 claims description 15
- 229910052708 sodium Inorganic materials 0.000 claims description 15
- 229910052749 magnesium Inorganic materials 0.000 claims description 14
- 230000001681 protective Effects 0.000 claims description 13
- XKRFYHLGVUSROY-UHFFFAOYSA-N argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 12
- 238000005275 alloying Methods 0.000 claims description 10
- 229910001092 metal group alloy Inorganic materials 0.000 claims description 10
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Inorganic materials [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 claims description 10
- 229910044991 metal oxide Inorganic materials 0.000 claims description 9
- 235000013024 sodium fluoride Nutrition 0.000 claims description 9
- PNEYBMLMFCGWSK-UHFFFAOYSA-N AI2O3 Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 8
- 150000004706 metal oxides Chemical class 0.000 claims description 8
- OGIDPMRJRNCKJF-UHFFFAOYSA-N TiO Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 7
- 229910001929 titanium oxide Inorganic materials 0.000 claims description 7
- WUKWITHWXAAZEY-UHFFFAOYSA-L Calcium fluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 6
- 229910052786 argon Inorganic materials 0.000 claims description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 6
- 239000001569 carbon dioxide Substances 0.000 claims description 6
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 6
- OYLGJCQECKOTOL-UHFFFAOYSA-L Barium fluoride Chemical compound [F-].[F-].[Ba+2] OYLGJCQECKOTOL-UHFFFAOYSA-L 0.000 claims description 5
- FVRNDBHWWSPNOM-UHFFFAOYSA-L Strontium fluoride Chemical compound [F-].[F-].[Sr+2] FVRNDBHWWSPNOM-UHFFFAOYSA-L 0.000 claims description 5
- 229910001632 barium fluoride Inorganic materials 0.000 claims description 5
- 229910001634 calcium fluoride Inorganic materials 0.000 claims description 5
- 238000002844 melting Methods 0.000 claims description 5
- 229910001637 strontium fluoride Inorganic materials 0.000 claims description 5
- FYYHWMGAXLPEAU-UHFFFAOYSA-N magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 4
- 230000002829 reduced Effects 0.000 claims description 4
- KLZUFWVZNOTSEM-UHFFFAOYSA-K AlF3 Chemical compound F[Al](F)F KLZUFWVZNOTSEM-UHFFFAOYSA-K 0.000 claims description 3
- 238000010891 electric arc Methods 0.000 claims description 2
- SRVINXWCFNHIQZ-UHFFFAOYSA-K Manganese(III) fluoride Chemical compound [F-].[F-].[F-].[Mn+3] SRVINXWCFNHIQZ-UHFFFAOYSA-K 0.000 claims 4
- 206010037660 Pyrexia Diseases 0.000 claims 1
- 239000011162 core material Substances 0.000 description 29
- UFHFLCQGNIYNRP-UHFFFAOYSA-N hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 18
- 239000001257 hydrogen Substances 0.000 description 17
- 229910052739 hydrogen Inorganic materials 0.000 description 17
- 239000010936 titanium Substances 0.000 description 9
- 239000011572 manganese Substances 0.000 description 8
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 8
- 239000007787 solid Substances 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 7
- 238000005755 formation reaction Methods 0.000 description 7
- 230000000670 limiting Effects 0.000 description 7
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 7
- 229910052710 silicon Inorganic materials 0.000 description 7
- 239000010703 silicon Substances 0.000 description 7
- RTAQQCXQSZGOHL-UHFFFAOYSA-N titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 7
- 229910052719 titanium Inorganic materials 0.000 description 7
- 229910052796 boron Inorganic materials 0.000 description 6
- PWHULOQIROXLJO-UHFFFAOYSA-N manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 6
- 229910052748 manganese Inorganic materials 0.000 description 6
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 5
- 239000011698 potassium fluoride Substances 0.000 description 5
- 239000011775 sodium fluoride Substances 0.000 description 5
- 239000003381 stabilizer Substances 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminum Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 239000012298 atmosphere Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 239000011651 chromium Substances 0.000 description 4
- 239000004615 ingredient Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 229910052804 chromium Inorganic materials 0.000 description 3
- 238000000151 deposition Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 239000003607 modifier Substances 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- QCWXUUIWCKQGHC-UHFFFAOYSA-N zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 3
- 229910052726 zirconium Inorganic materials 0.000 description 3
- 229910000851 Alloy steel Inorganic materials 0.000 description 2
- 229960005069 Calcium Drugs 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 2
- NROKBHXJSPEDAR-UHFFFAOYSA-M Potassium fluoride Chemical compound [F-].[K+] NROKBHXJSPEDAR-UHFFFAOYSA-M 0.000 description 2
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 2
- 229910052787 antimony Inorganic materials 0.000 description 2
- 239000010953 base metal Substances 0.000 description 2
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 2
- 229910052797 bismuth Inorganic materials 0.000 description 2
- 239000007767 bonding agent Substances 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium monoxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000010941 cobalt Substances 0.000 description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 2
- 229910052803 cobalt Inorganic materials 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 150000002222 fluorine compounds Chemical class 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 229910052738 indium Inorganic materials 0.000 description 2
- 239000011133 lead Substances 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006011 modification reaction Methods 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 2
- 239000011733 molybdenum Substances 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 2
- 229910052758 niobium Inorganic materials 0.000 description 2
- 239000010955 niobium Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N oxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000007712 rapid solidification Methods 0.000 description 2
- 238000007778 shielded metal arc welding Methods 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 229910052718 tin Inorganic materials 0.000 description 2
- 239000011135 tin Substances 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N tin hydride Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 239000010937 tungsten Substances 0.000 description 2
- 229910052720 vanadium Inorganic materials 0.000 description 2
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium(0) Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N Boron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 description 1
- 229960003563 Calcium Carbonate Drugs 0.000 description 1
- ZKATWMILCYLAPD-UHFFFAOYSA-N Niobium pentoxide Chemical compound O=[Nb](=O)O[Nb](=O)=O ZKATWMILCYLAPD-UHFFFAOYSA-N 0.000 description 1
- 210000004940 Nucleus Anatomy 0.000 description 1
- 210000002381 Plasma Anatomy 0.000 description 1
- NOTVAPJNGZMVSD-UHFFFAOYSA-N Potassium oxide Chemical compound [K]O[K] NOTVAPJNGZMVSD-UHFFFAOYSA-N 0.000 description 1
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N Tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910002065 alloy metal Inorganic materials 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- BAHXPLXDFQOVHO-UHFFFAOYSA-I bismuth pentafluoride Chemical compound F[Bi](F)(F)(F)F BAHXPLXDFQOVHO-UHFFFAOYSA-I 0.000 description 1
- 229910052810 boron oxide Inorganic materials 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 239000002800 charge carrier Substances 0.000 description 1
- 229910000423 chromium oxide Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000003247 decreasing Effects 0.000 description 1
- 230000002939 deleterious Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- CTNMMTCXUUFYAP-UHFFFAOYSA-L difluoromanganese Chemical compound F[Mn]F CTNMMTCXUUFYAP-UHFFFAOYSA-L 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- 239000010436 fluorite Substances 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium(0) Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 229910000460 iron oxide Inorganic materials 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910000484 niobium oxide Inorganic materials 0.000 description 1
- 230000036961 partial Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 235000003270 potassium fluoride Nutrition 0.000 description 1
- 229910001950 potassium oxide Inorganic materials 0.000 description 1
- 239000011814 protection agent Substances 0.000 description 1
- 239000003223 protective agent Substances 0.000 description 1
- 229910001948 sodium oxide Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 1
- GRUMUEUJTSXQOI-UHFFFAOYSA-N vanadium dioxide Chemical compound O=[V]=O GRUMUEUJTSXQOI-UHFFFAOYSA-N 0.000 description 1
- 229910001935 vanadium oxide Inorganic materials 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000005493 welding type Methods 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
Abstract
A cored electrode to form a weld bead with little or no gas tracking. The cored electrode includes a metal sheath and afill composition. The filling composition includes a slag forming agent and at least one fluorine containing compound.
Description
ELECTRODE WITH NUCLEUS OF FLUORITE FUNDENT
DESCRIPTION
BACKGROUND AND FIELD OF THE INVENTION
The invention relates generally to the welding field and more particularly relates to electrodes that have better weld bead forming properties, and even more particularly to core electrodes that form weld beads that have smaller trace amounts of gas. In the field of arc welding, the main types of welding processes are metal arc welding with gas (GMAW) or metallic arc welding with metal core (GMAW-C), arc welding with flux core protected by gas (FCAW-G), arc welding with self-protected flux core (FCAW-S), coated electrode arc welding (SMAW), submerged arc welding (SAW). From these processes, arc welding of gas-protected metal with solid or metallic core electrodes is increasing its use because such processes provide greater productivity and versatility. Such an increase in productivity and versatility comes from the continuous nature of the welding electrodes in gas metal arc welding (GMAW &GMAW-C) which offers significant productivity gains over the coated electrode arc welding ( SMAW). Moreover, these electrodes produce good looking welds with very little slag, thus saving time and expense associated with the cleaning of welds and slag wastes, a problem that is often encountered in other welding processes. In gas arc welding with solid or core electrodes, a shielding gas is used to provide protection for welding against atmospheric contamination during welding. The solid electrodes are appropriately alloyed with ingredients that, together with the protective gas, provide porosity-free welds with the desired physical and mechanical characteristics. In electrodes with a core, these ingredients are in the interior, in the core (filling) of a metallic outer shell, and provide a function similar to that of solid electrodes. The solid and core electrodes are designed to provide, under adequate gas protection, a sound weld, substantially free of porosities with elastic limit, tensile strength, ductility and impact resistance sufficient to satisfactorily perform the final applications. These electrodes are also designed to minimize the amount of slag generated during welding. Core electrodes are increasingly used as an alternative to solid wires due to increased productivity during the fabrication of structural components. Core electrodes are composite electrodes that consist of a core material (filler) surrounded by a metallic outer shell. The core consists mainly of metallic powder and flux ingredients to help the stability of the arc, the adhesion of the weld and the appearance, etc., so that the desired physical and mechanical characteristics are obtained in the welding. The core electrodes are made by mixing the core material ingredients and depositing them inside a formed strip, and then closing and stretching the strip to the final diameter. Core electrodes provide increasing deposition rates and produce a more consistent and wider weld penetration profile compared to solid electrodes. Moreover, they provide improved arc action, generate less smoke and sizzle or spatter and provide weld deposits with better adhesion compared to solid electrodes. In the field of welding, much effort has been put into the development of flux compositions of the type having predetermined flux components to work in predetermined ways. A large number of compositions have been developed for use as fluxes in arc welding. The fluxes are used in arc welding to control the stability of the arc, modify the composition of the filler metal and to provide protection against atmospheric pollution. The stability of the arch is commonly controlled by modifying the composition of the flux. It is therefore desirable to have substances that function well as plasma charge carriers in the flux mixture. The fluxes also modify the composition of the filler metal, causing the impurities in the metal to melt more easily and provide substances with which these impurities can be combined, preferably the metal to form the slag. Other materials may be added to lower the melting point of the slag, to improve the flowability of the slag and to serve as binders for the flux particles. Core electrodes are commonly used in electric arc welding of base metals steel. These electrodes usually provide high strength welds in a single step and in several steps at high welding speeds. These electrodes are formulated to provide a healthy, substantially non-porous weld bead with sufficient tensile strength, ductility and impact strength to satisfy the desired end use of various applications. One such welding electrode is disclosed in U.S. Patent No. 11 / 028,344 filed January 3, 2005 entitled "Cored Electrode to Reduce Diffusable Hydrogen" (Electrode with core for reducing hydrogen susceptible to diffusion), which is incorporated as support material. One of the many challenges during the formation of a filler metal is to form a high quality weld bead. A phenomenon during the formation of a weld bead is the gas trail (gas tracking). The gas trail is a phenomenon observed during the gas-protected FCAW where craters resembling worms are observed on the surface of the weld bead. This phenomenon is observed mainly in rapid solidification systems (based on rutile) where the slag solidifies much more quickly than the puddle of molten metal. Due to the rapid solidification of the slag, the gas evolving from the molten solder is partially trapped and craters are formed on the surface of the weld bead. Considering the state of the art, of the filling compositions used in conjunction with core welding electrodes, there is a need for a welding electrode with which a high quality weld bead is formed with reduced amounts of surface craters formed by trace Of gas .
SUMMARY OF THE INVENTION
The present invention is directed to welding electrodes, and more particularly, to a welding electrode that includes a filling composition that forms a high quality weld bead with reduced amounts of surface craters formed by gas trace. The welding electrode of the present invention can also be formulated to reduce the amount of hydrogen capable of diffusing in the weld bead; however, this is not required. The filling composition of the present invention particularly relates to core electrodes having a metal shell surrounding the filling composition in the core of the shell; however, the filler composition can be applied to other types of electrodes (e.g., coating on bar electrodes, etc.), or used as part of a flux composition in a submerged arc welding process. The filling composition of the present invention is formulated particularly for use with electrodes used to weld mild steel and low alloy steel; however, the filler composition can be used with electrodes for the formation of weld beads in other types of metals. The metal electrode is typically formed mainly of iron (e.g., carbon steel, low carbon steel, stainless steel, low alloy steel, etc.); however, the base metal can be formed mainly from other materials. The filler composition typically constitutes at least 1% by weight of the total weight of the electrode and not more than about 80% by weight of the total weight of the electrode, and typically about 8-60% by weight of the total weight of the electrode, and more typically 10-50% by weight of the total weight of the electrode, still more typically about 11-40% by weight of the total weight of the electrode, and still more approximately 12-30% by weight of the total weight of the electrode; however, other percentages by weight may be used. The filler composition includes one or more slag-forming agents and one or more fluorine-containing compounds. These components of the filler composition are used to form a unique slag system around the molten filler metal to reduce the gas trace of the filler metal. These components can also be used to facilitate the formation of the weld bead, to reduce the amount of hydrogen in the weld bead, and / or to protect the weld bead from the atmosphere, at least partially. The majority of the weight percentage of the one or more slag-forming agents includes titanium oxide (eg, rutile, etc.) and / or titanium oxide-containing compound (eg, potassium silicotitanate, sodium silicotitanate, etc.) .). The filler composition may additionally include slag-forming agents. The weight percent of the one or more slag-forming agents in the filler composition is generally less than about 80% by weight, typically about 20-75% by weight, and more typically about 35-60% by weight; however, other quantities may be used. Generally, the weight percent of the slag-forming agents is greater than the weight percent of the fluorine-containing compound. Generally, the weight percent ratio of the slag-forming agent to the fluorine-containing compound is about 1.1-20: 1, typically about 2-15: 1 and more typically about 5-12: 1; however, other proportions may be used. One or more compounds containing fluorine are used to modify the characteristics of the slag to reduce the tendency of trace gas in the weld bead formed. The fluorine-containing compound can be used to reduce the melting point of the slag. The lower melting point of the slag allows the slag to remain melted for a longer time to thereby gain time for the gases to evolve from the molten solder and dissolve in the slag. The inclusion of fluorine in the slag can also promote the formation of HF. One of the gases that develops from welding is hydrogen. The fluorine in the slag can react with the hydrogen gas that evolves or develops and form the HF. The formation of HF decreases the partial pressure of the hydrogen in the welding system in such a way that it reduces the incidence of gas traces. Fluoride in the slag can also reduce the amount of hydrogen in the weld bead formed. This reduction of hydrogen is believed to be achieved in one or more ways. It is believed that during the welding process, part of the fluorine compound decomposes and releases fluorine gas into the atmosphere. The gas released from fluorine has a protective effect that protects the melted weld bead from the surrounding moisture and / or from other sources of hydrogen. In addition, part of the fluorine can react with the hydrogen and form the HF which is insoluble in the molten filler metal. It is also believed that part of the low melting compound containing fluorine facilitates the coverage and / or coating of the weld bead to form a barrier against the surrounding hydrogen. As such, the amount of hydrogen that can diffuse in the weld bead is decreased. It is further believed that during the welding process, some of the fluorine compound decomposes and enters the slag covering the molten filler metal. It is believed that the fluorine in the slag modifies the slag network to allow for greater transfer of hydrogen from the molten filler metal. This transfer of hydrogen from the molten metal decreases the amount of hydrogen in the weld bead and also reduces the incidence of gas traces. Non-limiting examples of fluorine-containing compounds that can be included in the filler composition are aluminum fluoride, barium fluoride, bismuth fluoride, calcium fluoride, manganese fluoride, potassium fluoride, sodium fluoride, strontium fluoride , Teflon, NaSiF6, K2SiF6, Na3AlF6 and / or K3A1F6; however, it can be appreciated that other compounds or compounds containing fluorine can be used. The total fluorine content of the filling composition is at least about 0.5% by weight. Typically, the total fluorine content of the filling composition is at least about 15% by weight, more typically about 1-10%; however, it can be appreciated that other amounts of fluorine may be used. In a non-limiting embodiment of the invention, the one or more fluorine-containing compounds contributes (n) at least about 0.1% by weight of fluorine to the filler composition, and typically less than about 10% by weight; however, other amounts may be included in the filler In another and / or alternate aspect of the present invention, the composition of the metal shell of the welding electrode is selected to coincide at least approximately with the desired composition of the filler metal. The metal shell typically includes a majority of iron when welding a ferrous workpiece (e.g., carbon steel, stainless steel, etc.); however, the composition of the shell may include various types of metals to achieve a particular composition of the weld bead. In one embodiment of the invention, the metal shell mainly includes iron and may include one or more other elements, for example, but not limited to, aluminum, antimony, bismuth, boron, carbon, cobalt, copper, lead, manganese, molybdenum, nickel, niobium, silicon, sulfur, tin, titanium, tungsten, vanadium, zinc and / or zirconium. In yet another and / or alternate embodiment of the invention, the iron content of the metal shell is at least about 80% by weight.
In yet another and / or alternate aspect of the present invention, the filler composition may include one or more filler protective agents and / or modifying agents. The filler components can include metal alloying agents (eg, aluminum, boron, calcium, carbon, chromium, iron, manganese, nickel, silicon, titanium, zirconium, etc.) which are used at least partially to provide protection to the filler metal during and / or after a welding process, to facilitate a particular welding process, and / or to modify the composition of the weld bead. In one embodiment of the invention, the filler composition includes at least one of the filler metal protection agents. In another and / or alternative embodiment of the invention, the filler composition includes one or more alloying agents to facilitate the formation of a filler metal with the desired composition. In yet another and / or alternate embodiment of the invention, the filler composition includes one or more slag modifiers. Slag modifiers are typically used to increase and / or decrease the viscosity of the slag, to improve the ease of slag removal from the filler metal, reduce smoke production, reduce sizzle, etc.
In yet another and / or alternate aspect of the present invention, a shielding gas may be used in conjunction with the welding electrode to provide protection to the weld bead of elements and / or compounds in the atmosphere. The protective gas generally includes one or more gases. These one or more gases are generally inert or substantially inert with respect to the composition of the weld bead. In one embodiment, at least partially argon, carbon dioxide or mixtures thereof are used as a protective gas. In one aspect of this embodiment, the protective gas includes approximately 2-40% by volume of carbon dioxide and the balance is argon. In another and / or alternate aspect of this mode, the protective gas includes approximately 5-25% by volume of carbon dioxide and the argon balance. As can be appreciated, other and / or additional inert or substantially inert gases can be used. In yet another and / or alternate aspect of the present invention, the electrode of the present invention includes a filler composition that includes one or more slag-forming agents that do not include titanium oxide. These slag-forming agents may include one or more metal oxides (for example, aluminum oxide, boron oxide, calcium oxide, chromium oxide, iron oxide, magnesium oxide, niobium oxide, potassium oxide, silicon, sodium oxide, tin oxide, vanadium oxide, zirconium oxide, etc.) and / or one or more metal carbonates (eg, calcium carbonate, etc.). The slag system of the filler composition is used to provide, at least partially, protection to the filler metal or intermediate layer during and / or after a depositing process and / or to facilitate a particular depositing process. In yet another non-limiting embodiment of the invention, the slag system may include at least one slag bonding agent, arc stabilizing agent, slag removal agent and / or a surface deposit agent. The slag-bonding agent, when used, helps to ensure that the slag completely covers the deposited metal to protect the deposited metal from the atmosphere until at least partially deposited metal layers have been solidified and / or to facilitate the appearance of the deposited metal. The stabilizing agent, when used, facilitates the production of a still arc that minimizes sizzle. The surface deposit agent, when used, contributes to the gloss and overall surface appearance of the deposited metal. The slag removal agent, when used, it contributes to the easy removal of the slag on and / or around the deposited metal. The slag system may also include agents that increase and / or decrease the slag viscosity, and / or reduce the production of smoke. In another and / or alternate aspect of the present invention, the electrode of the present invention includes a filler composition which may include one or more deoxidizers used to reduce the deleterious effects of oxygen on the filler metal. Non-limiting examples of one or more deoxidizers that may be included in the filler composition include aluminum, magnesium, manganese, silicon and / or titanium. Generally, the deoxidizer, when included in the composition of the filler, constitutes less than about 40% by weight of the filler composition and typically about 1-30% by weight; however, another percent by weight can be used. In yet another and / or alternative aspect of the present invention, the electrode of the present invention includes a filler composition which may include one or more metal alloying agents selected to coincide at least approximately with the composition of the desired filler metal and / or to obtain the desired characteristics of the weld bead formed. Non-limiting examples of such alloy metals include aluminum, antimony, bismuth, boron, calcium, carbon, chromium, cobalt, copper, iron, lead, manganese, molybdenum, nickel, niobium, silicon, sulfur, tin, titanium, tungsten, vanadium. , zinc and / or zirconium; however, other or additional metal alloying agents can be used. In one embodiment, the metal alloying agent includes at least two metals selected from boron, iron, manganese, silicon and titanium. Generally, the metal alloying agent, when included in the filler composition, constitutes less than about 80% by weight of the filler composition, and typically about 10-60% by weight; however, other percentages by weight may be used. It is a primary object of the invention to provide a welding electrode that reduces the gas trace in a weld bead formed. Another and / or alternative object of the present invention is to provide a welding electrode that reduces the amount of hydrogen capable of diffusing in the weld bead. Still another and / or alternate object of the present invention is to provide a welding electrode that includes a combination of one or more compounds of titanium and compounds containing fluorine to reduce the trace of gas and / or the amount of hydrogen susceptible to diffuse in the cord formed.
Still another and / or alternate object of the present invention is to provide a welding electrode that is a core electrode. Still another and / or alternative object of the present invention is to provide a welding electrode that is a gas-protected core electrode. These and other objects and advantages will become apparent from the description of the invention.
DETAILED DESCRIPTION OF THE INVENTION
The core electrode of the present invention overcomes the e problems associated with the gas trace. The filler composition of the flux cored electrode includes titanium oxide because the main slag forming agent and one or more fluorine-containing compounds that are used modify at least partially the characteristics of the slag formed during welding. reduce or eliminate the existence of a trace of gas in the filler metal. Many types of compounds containing fluorine can be used in the filling composition. A general formulation of the filler composition (weight percent) according to the present invention is stated as follows:
Slag-forming agent without fluorine 15 - 80%
Fluorine-containing compound 0.5 - 20%
Metallic deoxidizer 0 - 40%
Metal alloy agent 0-70 -'d
Another more specific general formulation of the filler composition (weight percentage): Slag-forming agent that does not contain fluorine 25-75% Fluorine-containing compound 1-15%
Metallic deoxidizer 0 - 35%
Metal alloy agent 0 - 50%
In the e-mentioned general formulas, the fluorine content generated by one or more fluorine-containing compounds is at least t 0.05% by weight of the filler composition, typically at least t 0.1% by weight, more typically at minus 0.2% by weight. In the e general formulas, the weight percent of the filler composition is typically t 8-60% by weight of the core electrode, more typically t 10-28% by weight of the core electrode; however, other percentages by weight may be used. The metal shell that can be used to form the weld bead may include t 0-0.2 wt.% B, 0-0.2 wt.% C, t 0-12 wt.% Cr, t 0-5% in weight. weight of Mn, t 0-2% by weight of Mo, less than t 0.01% by weight of N, t 0-5% by weight of Ni, less than t 0.014% by weight of P, t 0-4% by weight Si weight, less than t 0.02% by weight of S, t 0-0.4% by weight of Ti, t 0-0.4% by weight of V and t 75-99.9% by weight of Fe. During a welding process by arc, a protective gas with the core electrode is typically used; however, this is not required. When a protective gas is used, the protective gas is typically a mixture of carbon dioxide and / or argon; however, other or additional gases may be used, for example, but not limited to helium. A specific non-limiting example of a filler composition (percent by weight) is as follows: Slag-forming agent containing 25-70% metal oxide Compound containing fluorine 0.5- 15%
Metallic deoxidizer 0.5-40%
Metal alloy agent (including 0.5-40% iron powder)
Another specific non-limiting example of a filler composition (weight percent) is as follows:
Ti02 30-65%
Other slag forming agents 0 - 15%
Compound containing fluorine 1 - 12%
Iron powder 0 - 12%
Cast iron powder 0 - 8% Metal alloy agent (except 0 - 18% iron powder) Metal deoxidizer 0 - 20%
Yet another specific non-limiting example of a filler composition (percentage by weight) is as follows:
Rutile 10 35%
Other compounds of Ti02 15-45% Al203 0 10%
Silica and / or silica compound 0 - 10%
Fluorine-containing compound 1.5 - 8%
FeB 0 - 1%
FeMn 0 - 15%
FeSi 0 - 15%
FeTi 0 - 15% Mg 0-6%
Cast Iron Powder 0 - 5% Fe 0-15% Powder Another specific non-limiting example of a filler composition (weight percentage) is as follows:
Rutile 12 - 30%
Potassium and / or sodium silicotitanate 24 - 35%
Al203 2 - 8%
Silica and / or silica compound 1 - 8% K2SÍF6 / Na2SÍF6, Na3AlF6, K3A1F6, NaF, KF and / or MnF 1.5 - 6%
FeB 0.05 - 1%
FeMn 1 - 10%
FeSi 1 - 10%
FeTi 1 - 10%
Mg 1 - 5%
Cast iron powder 0 - 4%
Fe powder 2 - 10%
Yet another specific non-limiting example of a filler composition (percentage by weight) is as follows: Rutile 14-30%
Silicotitanato sodium and / or potassium 25-32%
A1203 4 - 8%
Silica and / or silica compound 2 - 8%
K2SiF6, Na2SiF6, Na3AlF6 and / or K3AlF6 1.5 - 6%
FeB 0.05 - 0.6% FeMn 5 - 10%
FeSi 5 - 10
FeTi 2 - 8
Mg 1 - 4%
Cast iron powder 0 - 4%
Fe powder 4-10% In the five specific examples mentioned above, the weight percent of the filler composition is approximately 13-30% by weight of the core electrode and the metal shell includes approximately 0-0.2% by weight. weight of B, approximately 0.2% by weight of C, approximately 0-12% by weight of Cr, approximately 0-5% by weight of Mn, approximately 0-2% by weight of Mo, less than approximately 0.01% by weight of N, about 0-5% by weight of Ni, less than about 0.014% by weight of P, about .0-4% by weight of Si, less than about 0.02% of S, about 0-0.4% by weight Ti weight, approximately 0-0.4% by weight of V and approximately 75-99.9% by weight of Fe. During a process of arc welding, a protective gas with the core electrode is used. The protective gas is typically a mixture of carbon dioxide and argon. The boron content is approximately 15-30% by weight of FeB. The manganese content is about 30-50% by weight of FeMn. The silicon content is approximately 30-50% by weight of the FeSi. The titanium content is about 30-50% by weight of the FeTi. The carbon content is about 2-6% by weight of the cast iron powder. The average particle size of the filler components is approximately 40-200 mesh and typically approximately 40-100 mesh. In the examples mentioned above, rutile, sodium silicotitanate, potassium silicotitanate, Al203, silica and the silica compound are slag forming agents. Sodium silicotitanate and potassium silicotitanate are also a slag modification agent and an arc stabilizing agent. As noted, other or additional slag-forming agents, slag modifiers and / or arc stabilizers can be used in the composition of the filler. K2SiF6, Na2SiF6, K3A1F6, Na3AlF6, KF, MnF and NaF are the compounds that generate fluorine. The one or more fluorine generating compounds in the filler composition is (are) present in an amount of at least about 0.2 wt% of fluorine to the filler composition. KF, NaF, MnF, K2SiF6 and N2A1F6 are also slag modifying agents. KF, NaF, K2SiF6, N2SiF6, K3AlF6 and N3AlF6 are also arc stabilizing agents. As can be appreciated, one or more additional fluorine-generating compounds can be used in the filling composition. FeMn, FeSi, FeTi and magnesium are alloying agents and / or deoxidizing agents. These components are added to the filler composition to achieve the metal alloy composition of the desired filler metal and to reduce oxygen in and around the filler metal during the welding process. As can be appreciated, other or additional alloying agents and / or deoxidants can be used in the filling composition. Magnesium is added mainly as a deoxidizer. FeB is mainly a micro-alloy agent. As can be appreciated, another or additional microalloying agents can be used in the filling composition. Cast iron powder and Fe powder are also added to achieve the desired composition of the metal alloy of the filler metal. These and other modifications of the modalities discussed, as well as other modalities of the invention, will be obvious and suggested to the people with average knowledge in the matter, for which it should be clearly understood that the preceding descriptive matter is merely illustrative and should not be interpreted as a limitation thereof.
Claims (37)
1. A core electrode for forming a weld bead with reduced gas trace in a gas-protected electric arc welding process comprising a metal shell and a filler composition, the filler composition includes about 15-80% by weight of metal oxide slag forming agent, about 0.5-20% by weight of at least one fluorine-containing compound, and about 1-70% by weight of deoxidizing agent and / or metal-alloying agent, the percentage by weight of the metal oxide slag forming agent greater than the weight percentage of the fluorine-containing compound, the fluorine-containing compound provides at least 0.2% by weight of fluorine based on the weight percentage of the filling composition.
2. The core electrode according to claim 1, characterized in that a majority of the metal oxide is titanium oxide.
3. The core electrode according to claim 1, characterized in that the fluorine-containing compound includes A1F3, BaF2, CaF2, Na3AlF6 / K3AlF6, Na2SiF6, K2SiF6, MnF3, SrF2 or mixtures thereof.
4. The core electrode according to claim 2, characterized in that the fluorine-containing compound includes A1F3, BaF2, CaF2, Na3AlF6, K3A1F6, Na2SiF6, K2SiF6, MnF3, SrF2 or mixtures thereof.
5. The core electrode according to claim 1, characterized in that the metal shell includes at least about 80% by weight of iron.
6. The core electrode according to claim 4, characterized in that the metal shell includes at least 80% by weight of iron.
The core electrode according to claim 1, characterized in that the filling composition constitutes approximately 8-60% by weight of a total weight of the core electrode.
The core electrode according to claim 6, characterized in that the filling composition constitutes approximately 8-60% by weight of a total weight of the metal electrode.
9. The core electrode according to claim 1, characterized in that the filling composition includes: Ti02 30 - 65% Other slag forming agents 0 - 15% Compound containing fluorine 1 - 12% Iron powder 0 - 12% Cast iron powder 0 - 8% Metal alloy agent (except 0 - 18% iron powder) Metal deoxidizer 0 - 20%
10. Core electrode according to claim 8, characterized in that the filling composition includes: Ti02 30-65% Other slag forming agents 0 - 15% Compound containing fluorine 1 - 12% Iron powder 0 - 12% Cast iron powder 0 - 8% Metal alloy agent (except powder 0 - 18% iron) Metal deoxidizer 0 - 20%
11. Core electrode according to claim 9, characterized in that the filling composition includes: Rutile 10-35% Another compound of Ti02 15 - 45% Al203 0 - 10% Silica and / or silica compound 0 - 10% Fluorine-containing compound 1.5 - 8% FeB 0 - 1% FeMn 0 - 15% FeSi 0 - 15 FeTi 0 - 15 Mg 0-6% Cast iron powder 0 - 5% Fe 0-15% powder
12. The core electrode according to claim 10, characterized in that the filling composition includes: Rutile 10-35% Another compound of Ti02 15 - 45% A1203 0 - 10% Silica and / or silica compound 0 - 10% Fluorine-containing compound 1.5 - 8% FeB 0 - 1% FeMn 0 - 15% FeSi 0 - 15 FeTi 0 - 15 Mg 0 - 6% Cast iron powder 0 - 5% Fe 0-15% powder
13. The core electrode according to claim 10, characterized in that the filling composition includes: Rutile 12-30% Potassium and / or sodium silicotitanate 24-35% A1203 2- 8% Silica and / or silica compound 1- 8% K2SÍF6, Na2SiF6, Na3AlF6, K3A1F6, NaF, KF and / or MnF 1.5 - 6% FeB 0.05 - 1% FeMn 1 - 10% FeSi 1 - 10% FeTi 1- 10% Mg 1 - 5% Cast iron powder 0 - 4% Fe powder 2 - 10%
14. The core electrode according to claim 11, characterized in that the filling composition includes: Rutile 12-30% Potassium and / or sodium silicotitanate 24-35% A1203 2 - 8% Silica and / or silica compound 1 - 8% K2SiF6, Na2SiF6, Na3AlF6, K3A1F6, NaF, KF and / or MnF 1.5 - 6% FeB 0.05 - 1% FeMn 1 - 10% FeSi 1 - 10 FeTi 1 - 10 Mg 1 - 5% Cast iron powder 0 - 4% Fe powder 2 - 10%
15. The core electrode according to claim 13, characterized in that the filling composition includes: Rutile 14-30% Potassium and / or sodium silico-potassium 25 - 32% A1203 4 -8% Silica and / or silica compound 2 - 8% K2SÍF6, Na2SiF6, Na3AlF6 and / or K3A1F6 1.5 - 6% FeB 0.05 - 0.6% Fem. 5 - 10% FeSi 5 - 10% FeTi 2 - 8% Mg 1 - 4% Cast iron powder 0 - 4% Fe powder 4-10% 16.
The core electrode according to claim 14, characterized in that the filling composition includes: Rutile 14-30% Potassium and / or sodium silicotitanate 25 - 32% A1203 4 - 8% Silica and / or silica compound 2 - 8% K2SiF6, Na2SiF6, Na3AlF6 and / or K3AlF6 1.5 - 6% FeB 0.05 - 0.6% Fem. 5 - 10% FeSi 5 - 10% FeTi 2 - 8% Mg 1 - 4% Cast iron powder 0 - 4% Fe powder 4-10% 17.
The core electrode according to claim 16, characterized in that the filling composition includes: Rutile 16-28% potassium and / or sodium silicotitanate 26-32% A1203 4 - 8% Silica 2 - 6% K2SÍF6 / Na2SiF6, Na3AlF6 and / or K3A1F6 1.5 - 5% FeB 0.2 - 0.6% FeMn 5 - 10% FeSi 5 - 8% FeTi 2 - 6% Mg 1 - 3% Cast iron powder 1 - 4% Fe powder 4 - 8% 18.
A method for forming a weld bead with a reduced trace of gas comprising: a) providing a core electrode including a metal shell and a filler composition, the filler composition includes about 15-80% metal oxide slag agent, approximately 0.5-20% by weight of at least one fluorine-containing compound, and about 1-70% by weight of metal deoxidizing agent and / or a metal alloying agent, the weight percent of the metal oxide slag forming agent greater than the weight percentage of the compound containing fluorine, the fluorine-containing compound provides at least 0.2% by weight of fluorine based on the weight percentage of the filler composition; and, b) at least partially melting the core electrode by means of an electric current to cause the molten portion of the core electrode to be deposited on a workpiece.
The method according to claim 18, characterized in that it includes the step of directing a protective gas to the work piece to at least partially protect the molten portion of the core electrode that is deposited on a work piece.
The method according to claim 19, characterized in that the protective gas includes argon, carbon dioxide or mixtures thereof.
21. The method according to claim 17, characterized in that a majority of the metal oxide is titanium oxide.
22. The method according to claim 20, characterized in that a majority of the metal oxide is titanium oxide.
23. The method according to claim 17, characterized in that the fluorine-containing compound includes AlF3, BaF2, CaF2, Na3AlF6, K3A1F6, Na2SiF6, K2SiF6, MnF3, SrF2 or mixtures thereof.
24. The method according to claim 22, characterized in that the fluorine-containing compound includes AlF3, BaF2, CaF2, Na3AlF6, K3AlF6, Na2SiF6f K2SiF6, MnF3, SrF2 or mixtures thereof.
25. The method according to claim 17, characterized in that the metallic envelope includes at least about 80% by weight of iron.
26. The method according to claim 24, characterized in that the metal shell includes at least about 80% by weight of iron.
27. The method according to claim 17, characterized in that the filling composition constitutes approximately 8-60% by weight of a total weight of the core electrode.
The method according to claim 26, characterized in that the filler composition constitutes approximately 8-60% by weight of a total weight of the metal electrode.
29. The method of compliance with claim 17, characterized in that the filling composition includes: Ti02 30-65% Other slag forming agents 0 - 15% Compound containing fluorine 1 - 12% Iron powder 0 - 12% Cast iron powder 0 - 8% Metal alloy agent (except 0 - 18% iron powder) Metal deoxidizer 0 - 20%
30. The method according to claim 28, characterized in that the filling composition includes: Ti02 30-65% Other slag forming agents 0 - 15% Compound containing fluorine 1 - 12% Iron powder 0 - 12% Cast iron powder 0 - 8% Metal alloy agent (except 0 - 18% iron powder) Metallic deoxidizer 0 - 20%
31. The method according to claim 29, characterized in that the filling composition includes: Rutile 10-35% Another compound of Ti02 15 - 45% Al203 0 - 10% Silica and / or silica compound 0 - 10% Fluorine-containing compound 1.5 - 8% FeB 0 - 1% FeMn 0 - 15% FeSi 0 - 15% FeTi 0 - 15% Magnesium 0 - 6% Cast iron powder 0 - 5% Powder of Faith 0 - 15%
32. The method according to claim 30, characterized in that the filling composition includes: Rutile 10-35% Another compound of Ti02 15 - 45% Al203 0 - 10% Silica and / or silica compound 0 - 10% Fluorine-containing compound 1.5 - 8% FeB 0 - 1% FeMn 0 - 15% FeSi O - 15% FeTi 0 - 15% Mg 0 - 6% Cast iron powder 0 - 5% Powder of Faith 0 - 15%
33. The method according to claim 31, characterized in that the filling composition includes: Rutile 12-30% Potassium and / or sodium silicotitanate 24 - 35% A1203 2 - 8% Silica and / or silica compound 1 - 8% K2SÍF6, Na2SiF6, Na3AlF6, K3A1F6, NaF, KF and / or MnF 1.5 - 6% FeB 0.05 - 1% FeMn 1 - 10% FeSi 1 - 10% FeTi 1 - 10% Mg 1 - 5% Cast iron powder 0 - 4% Fe powder 2-10%
34. The method according to claim 32, characterized in that the filling composition includes: Rutile 12-30% Potassium and / or sodium silicotitanate 24 - 35% Al203 2 - 8% Silica and / or silica compound 1 - 8% K2SiF6, Na2SiF6, Na3AlF6, K3AlFe, NaF, KF and / or MnF 1.5-6% FeB 0.05- 1% FeMn 1 - 10% FeSi 1 - 10 FeTi 1 - 10 Mg 1 - 5% Cast iron powder 0 - 4% Fe powder 2-10%
35. The method according to claim 33, characterized in that the filling composition includes: Rutile 14-30% Potassium and / or sodium silicotitanate 25 - 32% At 2 O 3 4 - 8% Silica and / or silica compound 2 - 8% K2SiF6, Na2SiF6, Na3AlF6 and / or K3AlF6 1.5 - 6% FeB 0.05- 0.6% FeMn 5 10% FeSi 5 10% FeTi 2 8% Mg 4% Cast iron powder 0 4% Faith Powder 4 10%
36. The method according to claim 34, characterized in that the filling composition includes: Rutile 14-30% Potassium and / or sodium silicotitanate 25 - 32% A1203 4 - 8% Silica and / or silica compound 2 - 8% K2SiF6, Na2SiF6, Na3AlF6 and / or K3A1F6 1.5 - 6% FeB 0.05 - 0.6% FeMn 5-10% FeSi 5-10 FeTi 2 - 8 Mg 1 - 4% Cast iron powder 0 - 4% Fe 4 powder - 10%
37. The method according to claim 36, characterized in that the filling composition includes: Rutile 16-28% Potassium and / or sodium silicotitanate 26 - 32% A1203 4 - 8% Silica 2 - 6% K2SiF6 / Na2SiF6 / Na3 A1F6 and / or K3AlF6 1.5 - 5% FeB 0.2 - 0.6% FeMn 5 - 10% FeSi 5 - 8% FeTi 2 - 6% Mg 1 - 3% Cast iron powder 1 - 4% Fever Powder 4 - 8%
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US11099293 | 2005-04-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| MXPA06001306A true MXPA06001306A (en) | 2006-12-13 |
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