NO141636B - CONSUMABLE WELDING ELECTRODE. - Google Patents
CONSUMABLE WELDING ELECTRODE. Download PDFInfo
- Publication number
- NO141636B NO141636B NO754217A NO754217A NO141636B NO 141636 B NO141636 B NO 141636B NO 754217 A NO754217 A NO 754217A NO 754217 A NO754217 A NO 754217A NO 141636 B NO141636 B NO 141636B
- Authority
- NO
- Norway
- Prior art keywords
- welding
- steel
- boron
- welding electrode
- wire
- Prior art date
Links
- 238000003466 welding Methods 0.000 title claims description 22
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 12
- 229910052796 boron Inorganic materials 0.000 description 12
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 7
- 239000010936 titanium Substances 0.000 description 7
- 229910052719 titanium Inorganic materials 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 230000004907 flux Effects 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 4
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 4
- 238000000137 annealing Methods 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 229910052748 manganese Inorganic materials 0.000 description 4
- 239000011572 manganese Substances 0.000 description 4
- 239000011733 molybdenum Substances 0.000 description 4
- 229910052750 molybdenum Inorganic materials 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- QFGIVKNKFPCKAW-UHFFFAOYSA-N [Mn].[C] Chemical compound [Mn].[C] QFGIVKNKFPCKAW-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- 229910001634 calcium fluoride Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3053—Fe as the principal constituent
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Arc Welding In General (AREA)
- Nonmetallic Welding Materials (AREA)
- Resistance Welding (AREA)
Description
Søkerens norske patent nr. 139.311 angår en forbruk- The applicant's Norwegian patent no. 139,311 concerns a consumer
bar sveise-elektrode av stål som har lavt karbon- og silisium- bare welding electrode made of steel that has low carbon and silicon
innhold og inneholder titan, bor og molybden som obligatoriske bestanddeler. Dette stål har følgende prosentvise sammensetning: content and contains titanium, boron and molybdenum as mandatory components. This steel has the following percentage composition:
Det er en viktig forutsetning for stålets anvendelse It is an important prerequisite for the steel's use
til sveising at det oppviser god (kjerv)slagseighet. Tilfredsstil- for welding that it exhibits good (notch) impact resistance. satisfy-
lende slagseighet ble oppnådd med tilsetning av bor, titan og molybden i de mengder som er angitt i patent nr. 139.311. Det ble imidlertid nå oppdaget at i visse sammenheng, f.eks. ved sveising under lav varmetilførsel eller ved sveising av tynne plater kan molybdeninnholdet i sveisestålet være meget lavt. I dette til- high impact strength was achieved with the addition of boron, titanium and molybdenum in the amounts specified in patent no. 139,311. However, it was now discovered that in certain contexts, e.g. when welding under low heat input or when welding thin plates, the molybdenum content in the welding steel can be very low. In this to-
felle oppnås tilfredsstillende slagseighet på grunn av bor- og titaninnholdet uten at molybden bidrar vesentlig hertil. Dette var overraskende på bakgrunn av tidligere erfaring, og oppfinnelsen med-fører en betydelig kostnadsreduksjon ved fremstillingen av sveise-elektroder. trap, satisfactory impact strength is achieved due to the boron and titanium content without molybdenum contributing significantly to this. This was surprising on the basis of previous experience, and the invention leads to a significant cost reduction in the production of welding electrodes.
Oppfinnelsen angår en forbrukbar sveise-elektrode i The invention relates to a consumable welding electrode i
form av en tråd eller stang, fortrinnsvis forsynt med et tynt be- form of a wire or rod, preferably provided with a thin
legg av kobber, hvor stålet har den følgende sammensetning: layer of copper, where the steel has the following composition:
Manganmengden velges under hensyntagen til den ønskede styrke for det endelige sveisemetall. The amount of manganese is chosen taking into account the desired strength of the final weld metal.
Et innhold av aluminium anvendes fordi dette metall virker som desoksydasjonsmiddel under fremstillingen av stålet. Aluminium anvendes normalt i en mengde på minst 0,02% for dette formål. Aluminiuminnhold under 0,025%, spesielt 0,02% og der-under, er imidlertid blitt funnet å gi bedre sveiseegenskaper. A content of aluminum is used because this metal acts as a deoxidizing agent during the production of the steel. Aluminum is normally used in an amount of at least 0.02% for this purpose. However, aluminum contents below 0.025%, especially 0.02% and below, have been found to provide better welding properties.
Titaninnholdet er meget viktig, da det gir ytterligere desoksydering av sveisesmelten, fremmer dannelse av mindre kule-lignende inneslutninger og beskytter det tilstedeværende bor mot oksygen og nitrogen. The titanium content is very important, as it provides further deoxidation of the welding melt, promotes the formation of smaller ball-like inclusions and protects the boron present against oxygen and nitrogen.
Noe bor må foreligge ubundet. Man foretrekker at det ubundne eller frie bor foreligger i en mengde på minst 0,0002%. Minimumsmengden av bor som i alt er påkrevet i stålet i et gitt tilfelle, vil derfor avhenge av den mengde som bindes av oksygen og nitrogen, men man regner med at et minimum på 0,002% bor van-ligvis vil resultere i tilstrekkelige mengder fritt bor i stålet. Tilsvarende er det ønskelig at mengden av oksygen og nitrogen Some boron must be present unbound. It is preferred that the unbound or free boron is present in an amount of at least 0.0002%. The minimum amount of boron required in the steel in a given case will therefore depend on the amount bound by oxygen and nitrogen, but it is expected that a minimum of 0.002% boron will usually result in sufficient amounts of free boron in the steel. Similarly, it is desirable that the amount of oxygen and nitrogen
i stålet er liten. in the steel is small.
Den type stålfremstillingsprosess som velges, anses ikke å være viktig. Fortrinnsvis fremstilles stålet uten aluminium, titan og bor, hvoretter disse elementer tilsettes i den nevnte rekkefølge. Stålet tettes, eller desokeiyderes, hoved-sakelig med aluminium, titanet kan fjerne en stor del av even-tuelt gjenværende oksygen, og til slutt blir så bor tilsatt. The type of steelmaking process chosen is not considered to be important. Preferably, the steel is produced without aluminium, titanium and boron, after which these elements are added in the order mentioned. The steel is sealed, or decoiled, mainly with aluminium, the titanium can remove a large part of any remaining oxygen, and finally boron is added.
Et kobberbelegg på sveise-elektroden forbedrer den elektriske kontakt mellom tråden og strømkilden og beskytter dessuten tråden mot korrosjon. A copper coating on the welding electrode improves the electrical contact between the wire and the power source and also protects the wire from corrosion.
Trådens diameter er fortrinnsvis mellom 1 mm og 8 mm. The diameter of the thread is preferably between 1 mm and 8 mm.
Mengden av kobberbelegg på tråden er hensiktsmessig opp til 0,15 vekt-% av tråden, og den øvre grense er i praksis den mengde som resulterer i at mengden av kobber som overføres til sveise-metallet, blir skadelig for sveisemetallets egenskaper. The amount of copper coating on the wire is suitably up to 0.15% by weight of the wire, and the upper limit is in practice the amount which results in the amount of copper transferred to the weld metal becoming detrimental to the properties of the weld metal.
Sveise-elektroden ifølge oppfinnelsen kommer spesielt The welding electrode according to the invention comes in particular
til anvendelse ved pulverbuesveising eller elektroslaggsveising. for use in powder arc welding or electroslag welding.
Hvis den fluks som anvendes ved sveisingen er en sur fluks, vil titanet og boret ha en tendens til å oksydere, og silisium og mangan vil være tilbøyelig til å overføres fra fluksen til sveisesmelten. Man foretrekker derfor en basisk fluks for å redusere sådan oksydasjon og overføring av siliBium og mangan. If the flux used in the welding is an acidic flux, the titanium and boron will tend to oxidize, and silicon and manganese will tend to be transferred from the flux to the weld melt. A basic flux is therefore preferred to reduce such oxidation and transfer of silicon and manganese.
I de følgende eksempler illustrerer eksempel 1 og 2 oppfinnelsen, mens eksempel 3 angår anvendelse av en sveisetråd basert på karbon og mangan og er tatt med for sammenlignings-formål. In the following examples, examples 1 and 2 illustrate the invention, while example 3 concerns the use of a welding wire based on carbon and manganese and is included for comparison purposes.
I alle eksemplene ble et par plater BS 4360 50D sveiset sammen ved pulverbuesveising med en i handelen tilgjengelig basisk fluks inneholdende de følgende bestanddeler: 13,7% SiO^ i 0,1% MnO; 1,29% Fe203; 19,6 A1203; 12,58 CaO; 29,0 MgO; 0,5 Ti02; In all the examples, a pair of plates BS 4360 50D were welded together by powder arc welding with a commercially available basic flux containing the following ingredients: 13.7% SiO 2 in 0.1% MnO; 1.29% Fe2O3; 19.6 A1203; 12.58 CaO; 29.0 MgO; 0.5 TiO 2 ;
0,76 K20; 0,42 Na20; 18,0 CaF2; 0,32 Li02; 1,58 Zr^. Plate-tykkelsen var 38,1 mm. 0.76 K 2 O; 0.42 Na 2 O; 18.0 CaF2; 0.32 LiO 2 ; 1.58 Zr^. The plate thickness was 38.1 mm.
Analysene av prøveplåtene, sveisetrådene og det er-holdte sveisemetall er angitt i tabell 1. The analyzes of the test plates, the welding wires and the retained weld metal are shown in table 1.
I alle sveiseforsøkene ble det anvendt en likestrøms-bue, og den konsumerbare elektrodes polaritet var positiv, skjønt det også kan sveises med en negativ elektrode. In all the welding trials, a direct current arc was used, and the polarity of the consumable electrode was positive, although it is also possible to weld with a negative electrode.
EKSEMPEL L EXAMPLE L
En sveis ble laget under tilførsel av en varmemengde på 2,8 KJ/mm. Sveisen ble utprøvet med hensyn til kjervslagseighet (Charpy V-metoden) og strekkfasthetsegenskaper før og etter ut-glødning. A weld was made under the application of a heat quantity of 2.8 KJ/mm. The weld was tested with respect to notch impact strength (Charpy V method) and tensile strength properties before and after annealing.
EKSEMPEL 2 EXAMPLE 2
En sveis ble laget under tilførsel av en stor varmemengde på 6,42 KJ/mm. En tosidig, fullstendig kommersiell sveise-metode ble anvendt, og prøver uttatt fra begge sider av sveise-forbindelsen ble testet mekanisk uten forutgående glødebehandling. A weld was made under the application of a large amount of heat of 6.42 KJ/mm. A two-sided, fully commercial welding method was used, and samples taken from both sides of the weld joint were mechanically tested without prior annealing.
EKSEMPEL 3 EXAMPLE 3
En sveis ble laget til sammenligning på samme måte som A weld was made for comparison in the same way as
i eksempel 1, under tilførsel av den samme varme på 2,8 KJ/mm og under anvendelse av konvensjonell sveisetråd. Slagfasthetsegen-skaper og strekkfasthetsegenskaper ble målt før og etter utglød-ning. in example 1, applying the same heat of 2.8 KJ/mm and using conventional welding wire. Impact strength properties and tensile strength properties were measured before and after annealing.
Slagfasthetsegenskapene for sveisene, målt i Joule, er vist i tabell 3. The impact resistance properties of the welds, measured in Joules, are shown in table 3.
Diagrammene på tegningen viser en sammenligning mellom sveisenes, slagfasthet f'/r og etter glødning. fig. 1 viser en sammenligning mellom sveisene i følge eksempel 1 og 3 i uglødet tilstand. Fi.g. 2 v i scor en sammenligning mellom de samme to svei-ser i glødet tilstand. Fig. 3 viser en sammenligning mellom sveisene i følge eksempel 1 og 2 i uglødet tilstand og illustrerer virkningen av den større tilførte varme i eksempel 2. Det vil sees av figurene at slag fasthetsegenskapene ved lavere tempera-turer under anvendelse av tråden i følge oppfinnelsen er langt bedre enn det som ble oppnådd med vanlig karbon-mangan-tråd. The diagrams in the drawing show a comparison between the impact strength of the welds before and after annealing. fig. 1 shows a comparison between the welds according to examples 1 and 3 in the unannealed state. Fig.g. 2 v i scores a comparison between the same two welds in the annealed state. Fig. 3 shows a comparison between the welds according to examples 1 and 2 in the unannealed state and illustrates the effect of the greater added heat in example 2. It will be seen from the figures that the impact strength properties at lower temperatures when using the wire according to the invention are far better than what was achieved with ordinary carbon-manganese wire.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB53806/74A GB1532217A (en) | 1974-12-12 | 1974-12-12 | Welding and a steel suitable for use therein |
Publications (3)
Publication Number | Publication Date |
---|---|
NO754217L NO754217L (en) | 1976-06-15 |
NO141636B true NO141636B (en) | 1980-01-07 |
NO141636C NO141636C (en) | 1980-04-16 |
Family
ID=10469043
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO754217A NO141636C (en) | 1974-12-12 | 1975-12-11 | CONSUMABLE WELDING ELECTRODE. |
Country Status (10)
Country | Link |
---|---|
JP (1) | JPS51108645A (en) |
BE (1) | BE836560R (en) |
DE (1) | DE2556139A1 (en) |
FR (1) | FR2294240A2 (en) |
GB (1) | GB1532217A (en) |
IE (1) | IE42201B1 (en) |
IT (1) | IT1055714B (en) |
NL (1) | NL182782C (en) |
NO (1) | NO141636C (en) |
SE (1) | SE423336B (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5339594U (en) * | 1976-09-10 | 1978-04-06 | ||
US4170468A (en) * | 1977-12-22 | 1979-10-09 | United States Steel Corporation | Deoxidation of steel |
JPS6016878B2 (en) * | 1980-09-24 | 1985-04-27 | 新日本製鐵株式会社 | Submerged arc welding method for ultra-low carbon steel |
JPS632588A (en) * | 1986-06-23 | 1988-01-07 | Kawasaki Steel Corp | Welded steel pipe waving excellent site weldability |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5130020B1 (en) * | 1971-03-29 | 1976-08-28 |
-
1974
- 1974-12-12 GB GB53806/74A patent/GB1532217A/en not_active Expired
-
1975
- 1975-12-08 IE IE2662/75A patent/IE42201B1/en unknown
- 1975-12-10 NL NLAANVRAGE7514410,A patent/NL182782C/en not_active IP Right Cessation
- 1975-12-11 BE BE162683A patent/BE836560R/en not_active IP Right Cessation
- 1975-12-11 NO NO754217A patent/NO141636C/en unknown
- 1975-12-11 IT IT70046/75A patent/IT1055714B/en active
- 1975-12-11 SE SE7513976A patent/SE423336B/en unknown
- 1975-12-12 JP JP50148349A patent/JPS51108645A/ja active Pending
- 1975-12-12 DE DE19752556139 patent/DE2556139A1/en active Granted
- 1975-12-12 FR FR7538165A patent/FR2294240A2/en active Granted
Also Published As
Publication number | Publication date |
---|---|
NL182782B (en) | 1987-12-16 |
DE2556139A1 (en) | 1976-06-16 |
IE42201L (en) | 1976-06-12 |
IE42201B1 (en) | 1980-06-18 |
GB1532217A (en) | 1978-11-15 |
FR2294240A2 (en) | 1976-07-09 |
SE423336B (en) | 1982-05-03 |
DE2556139C2 (en) | 1988-08-11 |
FR2294240B2 (en) | 1981-02-27 |
SE7513976L (en) | 1976-06-14 |
JPS51108645A (en) | 1976-09-27 |
NL7514410A (en) | 1976-06-15 |
BE836560R (en) | 1976-04-01 |
NL182782C (en) | 1988-05-16 |
NO141636C (en) | 1980-04-16 |
NO754217L (en) | 1976-06-15 |
IT1055714B (en) | 1982-01-11 |
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