CN1323799C - Low alloy high-toughness electric welding rod containing copper - Google Patents
Low alloy high-toughness electric welding rod containing copper Download PDFInfo
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- CN1323799C CN1323799C CNB200510017336XA CN200510017336A CN1323799C CN 1323799 C CN1323799 C CN 1323799C CN B200510017336X A CNB200510017336X A CN B200510017336XA CN 200510017336 A CN200510017336 A CN 200510017336A CN 1323799 C CN1323799 C CN 1323799C
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Abstract
The present invention discloses a low-alloy high-toughness electric welding rod containing copper, which relates to the field of welding materials. The coating of the welding rod is fundamentally prepared from 42 to 55% of marble, 3 to 10 % of quartz, 16 to 25% of fluorite, 2 to 4% of metal manganese, 0.5 to 3% of ferric silicon, 8 to 12% of ferrotitanium, 0.5 to 1.0% of plasticizing agent (cellulase) and 3 to 9% of TiO2; 0.5 to 2.0% of rare earth fluoride is also added in the coating. The welding core of the welding rod is fundamentally prepared from 0.02 to 0.06% of C, at most 0.30% of Si, 1.00 to 1.60% of Mn, at most 0.015% of S and P, 2.50 to 3.00% of Ni, 0.10 to 0.30% of Mo, at most 80 ppm of N and at most 50 ppm of O. 0.30 to 0.70% of Cu and 0.03 to 0.15% of Ti are also simultaneously added in the welding core in a combination way. The present invention can enhance the low temperature toughness of a low-alloy steel electric welding rod, and enhance the adaptability of welding the low-alloy steel electric welding rod and the low alloy high-toughness electric welding rod containing copper.
Description
Technical field:
The present invention relates to field of welding material, a kind of low alloy high-toughness electric welding rod of cupric.
Prior art:
According to the retrieval, in the existing at home low-alloy steel welding rod patent, do not find the low-alloy steel welding rod of cupric as yet.
For the ordinary low-alloy steel welding rod of cupric not,, carry out well-designed to compositions of surfacing metal and core wire composition for improving the low-temperature flexibility of welding rod.
(1) design of compositions of surfacing metal
The optimal design of electrode coating generally is to adopt two kinds of methods, the one, and the basicity of increase slag, the 2nd, improve deoxidation effect.And the raising of slag basicity has a limit, works as B
IIW＞2.5 o'clock, usability of electrode can will reduce in (moulding of deslag performance, weld metal etc.); And on the basis of traditional deoxidation mode, (, thereby also increased development cost as O＜300ppm), can increase the development difficulty of electrode coating again if further reduce oxygen content in the weld metal.
(2) core wire composition Design
For improving the low-temperature flexibility of welding rod, the ordinary low-alloy steel welding rod with the design of core wire is: on the one hand be to reduce field trash in the core wire and gas content (S＜0.008%, P＜0.010%, N＜60ppm, O＜40ppm=are to take alloying and/or microalloying measure on the other hand.Further reduce field trash and gas content and can increase the core wire production cost; And take the core wire of alloying and/or microalloying measure, owing to do not contain copper component (because copper generally can reduce the low-temperature flexibility of weld metal etc.) in its composition, therefore when the Hi-Stren steel of welding cupric, can increase the mismatch of welding point.
Summary of the invention:
In order to solve the problem of above-mentioned existence, the invention provides a kind of low alloy high-toughness electric welding rod of cupric, the matching the when Hi-Stren steel of enhancing and cupric welds in the low-temperature flexibility of the low-alloy steel electrode that improves cupric.
The present invention adopts following technical scheme to realize:
A kind of low alloy high-toughness electric welding rod of cupric, this covering of an electrode basic composition is: marble 42-55%, quartzy 3-10%, fluorite 16-25%, manganese metal 2-4%, ferrosilicon 0.5-3%, ferrotianium 8-12%, plasticizer (cellulose) 0.5～1.0%, TiO
2Be 3-9%, also add 0.5～2.0% rare earth fluoride on this basis in the coating; This welding rod basic composition is with core wire: C:0.02-0.06%, Si≤0.30%, Mn:1.00-1.60%, S and P≤0.015%, Ni:2.50-3.00%, Mo:0.10-0.30%, N≤80ppm, O≤50ppm also unites the Cu of adding 0.30～0.70% and 0.03～0.15% Ti on this basis simultaneously in the core wire.
Owing to adopted technique scheme, the present invention to obtain following good effect:
Result of the test shows: after adopting this technical scheme, welding rod weld metal standard in the time of-40 ℃ is impacted Akv and is reached more than the 130J, the dynamic tear energy of NDT≤-90 of 16mm specification welding seam metal drop weight test ℃ ,-30 ℃ of following weld metals reaches more than the 700J; Before not adopting this technical scheme under the same conditions, welding rod weld metal standard in the time of-40 ℃ is impacted Akv only 80J, and the NDT of 16mm specification welding seam metal drop weight test only reaches 350J for the dynamic tear energy of-65 ℃ ,-30 ℃ following weld metals.
The present invention not only can improve the low-temperature flexibility of low-alloy steel welding rod, and the matching (rate of change of deposited metal obdurability and banjo fixing butt jointing obdurability is less than 10%) when having strengthened with the welding of the Hi-Stren steel of cupric; Because of the deoxidation mode of the basicity level of this electrode coating and weld metal all adopts the specification requirement of the design route of common low-alloy steel welding rod and field trash in the design of core wire composition and gas content general, so the present invention has also reduced the development difficulty and the production cost of low-alloy steel electrode.Because this technical scheme can adopt common low-alloy steel electrode manufacturing process when producing welding rod, therefore do not increase production cost.
Specific embodiments:
The present invention is at common CaO-SiO
2-CaF
2-TiO
2On the basis of type basic coating slag system and common Mn-Ni-Mo type alloy system low-alloy core wire, by take in electrode coating, to add an amount of rare earth fluoride, in the low-alloy core wire, unite simultaneously aggregate measures such as adding proper C u and Ti improve low-alloy steel electrode low-temperature flexibility and with the welding matching of cupric low-alloy high-strength steel.Welding rod of the present invention, its coating basic composition is: marble 42-55%, quartzy 3-10%, fluorite 16-25%, manganese metal 2-4%, ferrosilicon 0.5-3%, ferrotianium 8-12%, plasticizer (cellulose) 0.5～1.0%, TiO
2Be 3-9%, also add 0.5～2.0% rare earth fluoride on this basis in the coating; Welding rod basic composition is: C:0.02-0.06% meanwhile with core wire, Si≤0.30%, Mn:1.00-1.60%, S and P≤0.015%, Ni:2.50-3.00%, Mo:0.10-0.30%, N≤80ppm, O≤50ppm, also uniting simultaneously in the core wire on this basis to add has 0.30～0.70% Cu and 0.03～0.15% Ti.
Can adopt common low-alloy steel electrode manufacturing process when adopting this technical scheme to produce welding rod, that is: the medicinal powder that mixes be made the binding agent extrusion on the low-alloy core wire with sodium silicate.
For common CaO-SiO
2-CaF
2-TiO
2Basis in type basic coating slag system and the common Mn-Ni-Mo type alloy system core wire, because of a large amount of explanations are arranged in various documents and books, no longer discuss at this, below only be summarized as follows with regard to main effect and the limitation reason thereof of Cu in the rare earth fluoride in the electrode coating, the core wire composition and Ti:
The main component of rare earth fluoride is fluoride and rare earth compound, it not only can reduce the diffusible hydrogen content in the weld metal, and can significantly improve the toughness of weld metal, its mechanism that improves toughness mainly is by the size that changes field trash in the weld metal, shape and distributes and realize.Rare earth fluoride content is very little less than its effect in 0.5% o'clock in the coating, greater than the extrusion performance and the processing performance that can worsen welding rod at 2.0% o'clock.
Proper C u can improve the content and the thinning microstructure of the acicular ferrite in the weld metal in the core wire; Ti in the core wire can promote the formation of acicular ferrite when improving the weld metal deoxidation effect.Studies show that, in the core wire Cu content less than 0.30%, Ti content is not obvious less than its effect in 0.03% o'clock, Cu content greater than 0.70%, Ti content is greater than beginning to worsen weld metal toughness at 0.15% o'clock.
Below provide the several embodiment and the actual tests result of technical solution of the present invention adding ingredient in electrode coating and core wire:
Embodiments of the invention and actual tests result
| Embodiment and pilot project | The content of rare earth fluoride (%) in the coating | The content of Cu (%) in the core wire | The content of Ti (%) in the core wire | Standard Akv during weld metal-40 ℃, J | 16mm specification welding seam metal drop weight test NDT, ℃ | The dynamic tear energy of-30 ℃ of following weld metals, J |
| Embodiment 1 | 0.7 | 0.35 | 0.035 | 136 | -90 | 750 |
| Embodiment 2 | 1.2 | 0.42 | 0.052 | 142 | -100 | 720 |
| Embodiment 3 | 1.8 | 0.62 | 0.12 | 145 | -95 | 740 |
| Embodiment 4 | 0.5 | 0.31 | 0.032 | 135 | -95 | 760 |
| Embodiment 5 | 2.0 | 0.68 | 0.148 | 147 | -95 | 745 |
As can be seen from the table, in the low-alloy steel electrode coating, add an amount of rare earth fluoride, in core wire, unite and add proper C u and Ti, can make that low alloy high-toughness electric welding rod weld metal standard in the time of-40 ℃ of the cupric of being developed impacts that Akv reaches more than the 130J, the dynamic tear energy of NDT≤-90 of 16mm specification welding seam metal drop weight test ℃ ,-30 ℃ of following weld metals reaches more than the 700J.
Claims (1)
1, a kind of low alloy high-toughness electric welding rod of cupric is characterized in that: this covering of an electrode basic composition is: marble 42-55%, quartzy 3-10%, fluorite 16-25%, manganese metal 2-4%, ferrosilicon 0.5-3%, ferrotianium 8-12%, plasticizer 0.5～1.0%, TiO
2Be 3-9%, also add 0.5～2.0% rare earth fluoride on this basis in the coating; This welding rod basic composition is with core wire: C:0.02-0.06%, Si≤0.30%, Mn:1.00-1.60%, S and P≤0.015%, Ni:2.50-3.00%, Mo:0.10-0.30%, N≤80ppm, O≤50ppm, also uniting simultaneously in the core wire on this basis to add has 0.30～0.70% Cu and 0.03～0.15% Ti.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510017336XA CN1323799C (en) | 2005-01-21 | 2005-01-21 | Low alloy high-toughness electric welding rod containing copper |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510017336XA CN1323799C (en) | 2005-01-21 | 2005-01-21 | Low alloy high-toughness electric welding rod containing copper |
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| Publication Number | Publication Date |
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| CN1644300A CN1644300A (en) | 2005-07-27 |
| CN1323799C true CN1323799C (en) | 2007-07-04 |
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| CNB200510017336XA Expired - Fee Related CN1323799C (en) | 2005-01-21 | 2005-01-21 | Low alloy high-toughness electric welding rod containing copper |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101829860A (en) * | 2010-04-20 | 2010-09-15 | 哈尔滨工业大学 | Welding wire for unpreheated welding of red copper thick and large part and preparation method thereof |
| CN102059470B (en) * | 2010-12-17 | 2013-03-06 | 中国船舶重工集团公司第七二五研究所 | High-manganese and high-strength full-austenite welding rod with low thermal crack sensitivity |
| CN102649203B (en) * | 2012-05-24 | 2015-03-04 | 宝山钢铁股份有限公司 | Gas shielded welding wire and coil rod, with low cost, for nuclear power containment shell |
| CN102689104B (en) * | 2012-05-24 | 2015-03-04 | 宝山钢铁股份有限公司 | Gas shielded welding wire and wire rod for nuclear containment |
| CN103447717B (en) * | 2013-07-30 | 2016-03-09 | 中国船舶重工集团公司第七二五研究所 | A kind of low-temperature steel welding low-alloy steel electrode |
| CN113305469B (en) * | 2021-05-13 | 2022-11-08 | 中国船舶重工集团公司第七二五研究所 | Smelting flux for submerged-arc welding of austenitic welding wire and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85107951B (en) * | 1985-10-30 | 1988-01-06 | 冶金工业部钢铁研究总院 | High-efficient low-dust iron powder welding rod |
| CN1030381C (en) * | 1992-05-21 | 1995-11-29 | 鞍山钢铁公司 | Special cast iron electric welding rod |
| CN1117903A (en) * | 1994-08-30 | 1996-03-06 | 天津大学 | Low alloy steel high-toughness self-shielded flux-cored welding stick |
| JPH0949055A (en) * | 1995-08-08 | 1997-02-18 | Sumitomo Metal Ind Ltd | Weld metal having high strength and high toughness and its formation |
-
2005
- 2005-01-21 CN CNB200510017336XA patent/CN1323799C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85107951B (en) * | 1985-10-30 | 1988-01-06 | 冶金工业部钢铁研究总院 | High-efficient low-dust iron powder welding rod |
| CN1030381C (en) * | 1992-05-21 | 1995-11-29 | 鞍山钢铁公司 | Special cast iron electric welding rod |
| CN1117903A (en) * | 1994-08-30 | 1996-03-06 | 天津大学 | Low alloy steel high-toughness self-shielded flux-cored welding stick |
| JPH0949055A (en) * | 1995-08-08 | 1997-02-18 | Sumitomo Metal Ind Ltd | Weld metal having high strength and high toughness and its formation |
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