GB2121712A - Filled welding electrode - Google Patents
Filled welding electrode Download PDFInfo
- Publication number
- GB2121712A GB2121712A GB08315165A GB8315165A GB2121712A GB 2121712 A GB2121712 A GB 2121712A GB 08315165 A GB08315165 A GB 08315165A GB 8315165 A GB8315165 A GB 8315165A GB 2121712 A GB2121712 A GB 2121712A
- Authority
- GB
- United Kingdom
- Prior art keywords
- weight
- envelope
- powder
- maximum
- metallic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000003466 welding Methods 0.000 title claims abstract description 13
- 239000000843 powder Substances 0.000 claims abstract description 38
- 239000002184 metal Substances 0.000 claims abstract description 22
- 229910052751 metal Inorganic materials 0.000 claims abstract description 22
- 239000000470 constituent Substances 0.000 claims abstract description 20
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 9
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 8
- 238000000151 deposition Methods 0.000 claims abstract description 3
- 229910052748 manganese Inorganic materials 0.000 claims description 4
- 229910052750 molybdenum Inorganic materials 0.000 claims description 3
- 239000003381 stabilizer Substances 0.000 claims description 3
- 238000005275 alloying Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 235000010216 calcium carbonate Nutrition 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
- 229910052681 coesite Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
Classifications
-
- 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
- B23K35/308—Fe as the principal constituent with Cr as next major constituent
- B23K35/3086—Fe as the principal constituent with Cr as next major constituent containing Ni or Mn
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Nonmetallic Welding Materials (AREA)
Abstract
The present invention relates to an arc welding electrode for the purpose of depositing an austenitic weld metal containing at least 7% Ni and at least 15% Cr, said electrode having a tubular, metal envelope and a powder filling, which contains metal powder. The envelope and the powder filling contain the same metallic constitutents together with C and Si, and the ratio of the percentage proportions by weight of each metallic constituent in the envelope in relation to the weight of the envelope to the corresponding percentage proportions by weight of the metallic constituents in the metallic powder in relation to the weight of the metal powder including the C and Si is between 0,75 and 1,33, and preferably between 0,9 and 1,1. The electrode produces weld metal of highly uniform quality.
Description
SPECIFICATION
Filled welding electrode
The present invention relates to a filled welding electrode having a tubular, metallic envelope and a powder filling, which contains nonalloyed and/or alloyed metal powder, for the purpose of depositing an austenitic weld metal containing at least 7% Ni and at least 15% Cr.
The filled electrode combines some of the advantages of the solid wire electrode and some of the advantages of the coated electrode. The filled electrode is, like the wire electrode, highly suitable for automatic welding. By the appropriate choice of the powder filling it is easy to regulate the amount of alloying materials supplied to the weld metal, which is also a distinguishing feature of the coated electrode.
The filled electrode is particularly suitable for welding operations of the kind in which a high rate of welding and good penetration are called for and achieves, in terms of the weight of metal deposited per unit time and the weight of metal deposited per unit of current and time, better values than the two other types of electrode. Other advantages of the filled electrode over the solid wire electrode which may be mentioned are the lower spatter losses of the filled electrode and its less tendency to form pores in the deposited weld metal.
In order to produce an austenitic weld metal which contains at least 7% Ni and at least 15% Cr, it is usual to use filled electrodes with an envelope of soft steel and with a powder filling which contains the alloying materials appropriate to the composition of the weld metal. An even distribution of these alloying materials along the entire length of the electrode is highly desirable for the uniform quality of the weld metal.
In a previously disclosed process for the manufacture of filled electrodes, a strip is first bent into a channel, which is then filled with powder. This requires the powder to be spread very evenly along the strip. Special control devices are used during filling to monitor that a constant quantity of powder per unit of length is fed into the channel. The powderfilled channel is then bent into a sealed tube.
The diameter of the sealed tube is then reduced by drawing until a diameter suitable for welding purposes has been produced, usually between about 1,2 and 3,2 mm. The distribution of the powder inside the tube can no longer be controlled during these drawing operations. The presence of a certain degree of unevenness in the distribution of the welding powder inside the tube is unavoidable in all electrodes whose diameter has been reduced by drawing.
The object of the present invention is to provide a filled electrode of the kind mentioned by way of introduction, by means of which a weld metal of very uniform quality can be achieved. In accordance with the invention a filled electrode is characterized by the envelope and the powder filling containing the same metallic constituents and by the ratio of the percentage proportions by weight of each metallic constituent in the envelope in relation to the weight of the envelope to the corresponding proportions by weight of the metallic constituents in the metal powder in relation to the weight of the metal powder including the weight C and Si being between 0,75 and 1,33, and preferably between 0,9 and 1,1. When determining the amounts of the metallic constituents no account is taken of the commonly occurring impurities.It is advisable to weld with this electrode under a protective atmosphere.
The ratio must lie within the limits 0,75 and 1,33 in order to achieve a good homogeneous weld deposit. If the ratios lie between the limits 0,9 and 1,1 the quality of the weld deposit meets all present known requirements.
The percentage proportion of each metallic constituent in the enelope must not, therefore, differ significantly from the corresponding percentage proportion in the powder. If the envelope contains, for instance, a% of Ni in relation to the weight of the envelope, then the powder must contain a minimum of 0,75 a% of Ni or a maximum of 1,33 a% of Ni, and preferably a minimum of 0,9 a% of Ni or a maximum of 1,1 a% of Ni, in relation to the weight of powder determined from the metal powder plus C and Si.
In accordance with a preferred embodiment of the invention, the filled electrode has an envelope which contains in addition to a maximum of 0,1 5% C and a maximum of 2,0% Si as metallic constituents in non-alloyed or alloyed form 17-26% Cr, 9-14% Ni, a maximum of 6% Mn, with the remainder being Fe, these percentages relating to the weight of the envelope, and a powder filling which, in that part consisting of metallic consituents together with C and Si, contains in addition to a maximum of 0,1 5% C and a maximum of 2,0% Si as metallic constituents in non-alloyed and/or alloyed form 17-26% Cr, 9-14% Ni, a maximum of 5% Mo, and a maximum of 6% Mn, with the remainder being Fe powder, these latter percentages relating to the weight of that part of the powder filling which is composed of said metallic constituents, C and Si.
In accordance with the invention it is further advantageous that the powder filling contains slag-forming constituents and/or arc stabilizers which in total amount to at least 20% of the total weight of the powder filling. For example, Awl203 and SiO2 may be used as slagforming constituents, and CaF2 and CaCO3 may be used as arc stabilizers.
It is also advantageous that the ratio of the weight of the envelope to the total weight of powder lies between 0,9 and 2,0, and preferably between 1,2 and 1,7. If the ratio is less than 0,9 the envelope will be too thin, and if it is more than 2,0 the envelope will be too thick. At ratios outside these limits, considerable problems will arise in conjunction with the manufacture of the electrodes, especially when they are to be drawn to the required diameter.
Claims (4)
1. Filled welding electrode having a tubular metallic envelope and a powder filling, which contains non-alloyed and/or alloyed metal powder, for the purpose of depositing an austenitic weld metal containing at least 7% Ni and at least 15% Cr, wherein the envelope and the powder filling contain the same metallic constituents and the ratio of the percentage proportions by weight of each metallic constituent in the envelope in relation to the weight of the envelope to the corresponding percentage proportions by weight of the metallic constituents in the metal powder in relation to the weight of the metal powder including the weight of C and Si is between 0,75 and 1,33, and preferably between 0,9 and 1.1.
2. Filled welding electrode in accordance with Claim 1, wherein the envelope contains in addition to a maximum of 0,1 5% C and a maximum of 2,0% Si as metallic constituents in non-alloyed and/or alloyed form 17-26% Cr, 9-14% Ni, a maximum of 5% Mo, and a maximum of 6% Mn, with the remainder being Fe, these percentages being in relation to the weight of the envelope, and the powder filling which, in that part consisting of metallic constituents together with C and Si, contains in addition to a maximum of 0,1 5% C and a maximum of 2,0% Si as metallic constituents in non-alloyed and/or alloyed form 17-26% Cr, 9-14% Ni, a maximum of 5% Mo, and a maximum of 6% Mn, with the remainder being Fe powder, these latter percentages being in relation to the weight of that part of the powder filling which is composed of said metallic constituents, C and Si.
3. Filled welding electrode in accordance with Claim 1 or 2, wherein the powder filling contains slagforming constituents and/or arc stabilizers which in total amount to not more that 20% of the total weight of the powder filling.
4. Filled welding electrode in accordance with any of the Claims 1 to 3, wherein the ratio of the weight of the envelope to the total weight of powder is between 0,9 and 2,0, and preferably between 1,2 and 1.7.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE8203586A SE431301B (en) | 1982-06-10 | 1982-06-10 | ELECTRIC FOR LIGHT BACK WELDING WITH RUB-SHAPED, METALLIC WRAPPING AND A POWDER FILLING |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8315165D0 GB8315165D0 (en) | 1983-07-06 |
| GB2121712A true GB2121712A (en) | 1984-01-04 |
| GB2121712B GB2121712B (en) | 1986-06-25 |
Family
ID=20347030
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08315165A Expired GB2121712B (en) | 1982-06-10 | 1983-06-02 | Filled welding electrode |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE3320513A1 (en) |
| GB (1) | GB2121712B (en) |
| SE (1) | SE431301B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0208496A1 (en) * | 1985-07-02 | 1987-01-14 | Inco Alloys International, Inc. | Weld wire from extruded nickel containing powder |
Families Citing this family (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU628325B2 (en) * | 1988-02-05 | 1992-09-17 | Commonwealth Scientific And Industrial Research Organisation | Improved cored electrode wires |
| WO2012129505A1 (en) * | 2011-03-23 | 2012-09-27 | Scoperta, Inc. | Fine grained ni-based alloys for resistance to stress corrosion cracking and methods for their design |
| CN104039483B (en) | 2011-12-30 | 2017-03-01 | 思高博塔公司 | Coating composition |
| WO2014059177A1 (en) | 2012-10-11 | 2014-04-17 | Scoperta, Inc. | Non-magnetic metal alloy compositions and applications |
| EP3055802B1 (en) | 2013-10-10 | 2023-12-06 | Oerlikon Metco (US) Inc. | Methods of selecting material compositions and designing materials having a target property |
| CA2931842A1 (en) | 2013-11-26 | 2015-06-04 | Scoperta, Inc. | Corrosion resistant hardfacing alloy |
| US10173290B2 (en) | 2014-06-09 | 2019-01-08 | Scoperta, Inc. | Crack resistant hardfacing alloys |
| MY190226A (en) | 2014-07-24 | 2022-04-06 | Oerlikon Metco Us Inc | Hardfacing alloys resistant to hot tearing and cracking |
| CA2956382A1 (en) | 2014-07-24 | 2016-01-28 | Scoperta, Inc. | Impact resistant hardfacing and alloys and methods for making the same |
| JP7002169B2 (en) | 2014-12-16 | 2022-01-20 | エリコン メテコ（ユーエス）インコーポレイテッド | Multiple hard phase-containing iron alloys with toughness and wear resistance |
| CN108350528B (en) | 2015-09-04 | 2020-07-10 | 思高博塔公司 | Chromium-free and low-chromium wear-resistant alloys |
| AU2016321163B2 (en) | 2015-09-08 | 2022-03-10 | Scoperta, Inc. | Non-magnetic, strong carbide forming alloys for powder manufacture |
| JP2018537291A (en) | 2015-11-10 | 2018-12-20 | スコペルタ・インコーポレイテッドＳｃｏｐｅｒｔａ， Ｉｎｃ． | Antioxidation twin wire arc spray material |
| CA3017642A1 (en) | 2016-03-22 | 2017-09-28 | Scoperta, Inc. | Fully readable thermal spray coating |
| US20210164081A1 (en) | 2018-03-29 | 2021-06-03 | Oerlikon Metco (Us) Inc. | Reduced carbides ferrous alloys |
| JP7641218B2 (en) | 2018-10-26 | 2025-03-06 | エリコン メテコ（ユーエス）インコーポレイテッド | Corrosion and wear resistant nickel-based alloy |
| CN113631750A (en) | 2019-03-28 | 2021-11-09 | 欧瑞康美科（美国）公司 | Thermally sprayed iron-based alloys for coating engine cylinder bores |
| EP3962693A1 (en) | 2019-05-03 | 2022-03-09 | Oerlikon Metco (US) Inc. | Powder feedstock for wear resistant bulk welding configured to optimize manufacturability |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1056804A (en) * | 1964-05-22 | 1967-02-25 | Philips Electronic Associated | Improvements in or relating to flux-cored welding electrodes for electric arc welding |
| GB1069476A (en) * | 1965-03-23 | 1967-05-17 | Murex Welding Processes Ltd | Improvements in arc welding electrodes |
| GB1160156A (en) * | 1967-04-18 | 1969-07-30 | Murex Welding Processes Ltd | Arc Welding Electrodes |
| GB1447667A (en) * | 1972-11-13 | 1976-08-25 | Tsukishima Kikai Co | Flux-cored wire for electrogas arc welding |
| GB1470750A (en) * | 1975-03-25 | 1977-04-21 | Ver Edelstahlwerke Ag | Welding material for electric arc welding |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| LU52783A1 (en) * | 1966-01-13 | 1967-03-10 |
-
1982
- 1982-06-10 SE SE8203586A patent/SE431301B/en not_active IP Right Cessation
-
1983
- 1983-06-02 GB GB08315165A patent/GB2121712B/en not_active Expired
- 1983-06-07 DE DE19833320513 patent/DE3320513A1/en active Granted
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1056804A (en) * | 1964-05-22 | 1967-02-25 | Philips Electronic Associated | Improvements in or relating to flux-cored welding electrodes for electric arc welding |
| GB1069476A (en) * | 1965-03-23 | 1967-05-17 | Murex Welding Processes Ltd | Improvements in arc welding electrodes |
| GB1160156A (en) * | 1967-04-18 | 1969-07-30 | Murex Welding Processes Ltd | Arc Welding Electrodes |
| GB1447667A (en) * | 1972-11-13 | 1976-08-25 | Tsukishima Kikai Co | Flux-cored wire for electrogas arc welding |
| GB1470750A (en) * | 1975-03-25 | 1977-04-21 | Ver Edelstahlwerke Ag | Welding material for electric arc welding |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0208496A1 (en) * | 1985-07-02 | 1987-01-14 | Inco Alloys International, Inc. | Weld wire from extruded nickel containing powder |
Also Published As
| Publication number | Publication date |
|---|---|
| SE431301B (en) | 1984-01-30 |
| DE3320513C2 (en) | 1987-12-17 |
| GB8315165D0 (en) | 1983-07-06 |
| SE8203586L (en) | 1983-12-11 |
| DE3320513A1 (en) | 1983-12-15 |
| GB2121712B (en) | 1986-06-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |