CN101920412A - High-temperature resistant low alloy steel electrode coating and electrode thereof - Google Patents
High-temperature resistant low alloy steel electrode coating and electrode thereof Download PDFInfo
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- CN101920412A CN101920412A CN 201010274671 CN201010274671A CN101920412A CN 101920412 A CN101920412 A CN 101920412A CN 201010274671 CN201010274671 CN 201010274671 CN 201010274671 A CN201010274671 A CN 201010274671A CN 101920412 A CN101920412 A CN 101920412A
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- alloy steel
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Abstract
The invention provides a high-temperature resistant low alloy steel electrode coating and an electrode thereof, belonging to the welding technical field. The coating comprises the following components by weight percentage: 30-40% of CaO, 16-25% of CaF2, 5-10% of TiO2, 12-18% of SiO2, 2-5% of MnFe, 4-6% of K2O, 5-6% of Na2O and 4-8% of Cr; and the electrode comprises the following components by weight percentage: C: 0.06-0.15, Si: not more than 0.60, S: not more than 0.015, P: not more than 0.025, Mn: not more than 1.00, Ni: not more than 0.40, Cr: 0.80-1.50, Mo: 0.60-1.30, V: 0.20-0.35 and the balance Fe. The invention can further improve the welding technological properties, and has lower price as balance metal components are adopted.
Description
Technical field
What the present invention relates to is a kind of scolder of technical field of welding materials, specifically is a kind of high-temperature resistant low alloy steel chemical coating of welding electrode and welding rod thereof.
Background technology
Along with the fast development of metal manufacturing and secondary industry, to the also raising day by day of product technology requirement of the used welding rod of welding procedure.At present, to a large amount of uses of the high-temperature resistant low alloy steel spares such as steam turbine, valve and hot-rolling mill bearing shaft under 680 combustion machine 2# stationary blade carriers, high temperature or the alternating temperature-changing, the use amount of its corresponding low-alloy steel welding rod is also significantly increased on the market.Simultaneously, in this type of low-alloy steel part welding process, not only welding condition, process and welder will satisfy corresponding standard and requirement, and welding material also must satisfy the requirement of postwelding deposited metal composition, hardness requirement, mechanical property requirements, cracking resistance requirement etc.
In addition,, also can constantly increase the demand of this type of low-alloy steel part along with the growth requirement of low-alloy steel part in the world, and to the welding material demand that matches with it also in continuous increase.Find through literature search prior art, in existing low-alloy steel part welding rod patent, the welding material that generally uses at present on the market is BOEHLER FOX DCMV welding rod, METRODE-13CMV welding rod, R327 welding rod and R337 welding rod, and BOEHLER FOX DCMV welding rod and METRODE-13CMV welding rod mainly are suitable for the welding of G17CrMoV5-10 type low-alloy cast steel, and that above-mentioned two kinds of welding rods adopt all is CaO-CaF
2-SiO
2Type basic coating slag system, and be aided with the higher a large amount of metal powders of price and make welding rod, cause its market price costliness, and R327 welding rod and R337 welding rod be in welding during this type of low-alloy steel part, the chemical composition of the deposited metal of wlding, the impact property of joint and cracking resistance all can not meet the demands.
Find that through retrieval CN200710020978.4 and CN200610028032.8 patent are used for the soldering low alloy steel simultaneously to prior art.And in these two documents, different compositions of surfacing metal and serviceability etc. have been introduced respectively.
But the welding rod cost under the prior art is higher or weld metal does not satisfy the condition of work of high temperature.This class rare earth metal of cerium oxide is arranged in the compositions of surfacing metal of CN200710020978.4 patent, the mutually deserved production cost that just improves welding rod, though and the CN200610028032.8 patent has the characteristic of high-intensity high-tenacity, but the significantly reduction of material yield intensity, hot strength appears when working under hot conditions easily, and occur crackle easily and fall, cause defectives such as reduction in service life.
Summary of the invention
The present invention is directed to the prior art above shortcomings, a kind of high-temperature resistant low alloy steel chemical coating of welding electrode and welding rod thereof are provided, alkalescence and acid compound based on balance, composition is simpler, reasonable, welding technological properties has also obtained improving further, the scope of application is wider, and price is also more cheap.
The present invention is achieved by the following technical solutions
The present invention relates to a kind of high-temperature resistant low alloy steel chemical coating of welding electrode, its component and percetage by weight are: CaO:30-40%, CaF
2: 16-25%, TiO
2: 5-10%, SiO
2: 12-18%, MnFe:2-5%, K
2O:4-6%, Na
2O:5-6% and Cr:4-8%.
The present invention relates to a kind of preparation method of high-temperature resistant low alloy steel welding rod, behind the H08A core wire that described high-temperature resistant low alloy steel chemical coating of welding electrode parcel is commercially available, after compacting on the oil pressure type electrode extrusion press, drying is made described welding rod, and wherein: the mass percent of coating and core wire is 36.5% and 63.5%.
The present invention relates to the high-temperature resistant low alloy steel welding rod that method for preparing obtains, its component and percetage by weight are: C:0.06%-0.15%, Si: S≤0.60%: P≤0.015%: Mn≤0.025%: Ni≤1.00% :≤0.40%, Cr:0.80-1.50%, Mo:0.60-1.30, V:0.20-0.35, all the other are Fe.
The present invention has quite outstanding advantage:
(1) more simple, rational formula rate, make welding bead smooth, have good removing slag property, can complete penetration, fusion is good, open defects such as no slag inclusion, pore, macroscopic cracking have more good welding technological properties.
(2) this welding rod not only is exclusively used in the welding of high-temperature resistant low alloy steel spare, can be used for the welding of equivalent material member equally, has very high practical value.
(3) the present invention can directly apply to the welding production of all kinds high-temperature resistant low alloy steel spare, help enterprise to reduce production costs, improve product quality and production efficiency.
The specific embodiment
Below embodiments of the invention are elaborated,, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment for embodiment is being to implement under the prerequisite with the technical solution of the present invention.
Selecting diameter in following examples is the high-quality H08A core wire of Φ 4mm.Its concrete chemical composition sees Table 1;
The concrete chemical composition contrast of the core wire of table 1 embodiment of the invention welding rod (weight %)
Embodiment covering of an electrode composition proportion sees Table 2;
Table 2 is an embodiment covering of an electrode composition proportion (weight %)
The preparation of welding rod of the present invention is to be pressed into welding rod on common oil pressure type electrode extrusion press.For test piece for welding usefulness, welding is a low alloy steel plate with test plate (panel) to welding rod behind the hyperthermia drying of 150 ℃ of low temperature dryings and 350 ℃, and the monolithic test plate (panel) is of a size of 45 * 200 * 700 (mm), and its chemical composition sees Table 3;
Table 3 adopts the chemical composition (weight %) of low-alloy steel steel plate for embodiment
| C | Si | Mn | P | S | Cr | Mo | V | Ni | Cu | Fe |
| 0.18 | 0.39 | 0.070 | 0.016 | 0.009 | 1.35 | 0.94 | 0.24 | 0.017 | 0.024 | Surplus |
Groove size, sample position and test method etc. are all implemented by the regulation of standard GB/T5118.The chemical composition of the deposited metal of welding rod is all listed table 4 in;
Table 4 is the deposited metal composition (weight %) of embodiment welding rod except that Fe
The mechanical property of welding rod deposited metal is listed table 5 in;
Table 5 is the mechanical property of embodiment welding rod deposited metal
| Sequence number | 0.2% yield strength (N/mm 2) | Hot strength (N/mm 2) | Percentage elongation (%) | Ballistic work (J) |
| 1 | 550 | 690 | 23 | 54 |
| 2 | 555 | 685 | 25 | 50 |
| 3 | 560 | 700 | 22 | 63 |
The cracking resistance of welding rod deposited metal is listed table 6 in.
Table 6 is the cracking resistance of embodiment welding rod deposited metal
Claims (3)
1. a high-temperature resistant low alloy steel chemical coating of welding electrode is characterized in that, its component and percetage by weight are: CaO:30-40%, CaF
2: 16-25%, TiO
2: 5-10%, SiO
2: 12-18%, MnFe:2-5%, K
2O:4-6%, Na
2O:5-6% and Cr:4-8%.
2. preparation method according to the high-temperature resistant low alloy steel welding rod of the described coating of claim 1, it is characterized in that, behind the H08A core wire that described high-temperature resistant low alloy steel chemical coating of welding electrode parcel is commercially available, after compacting on the oil pressure type electrode extrusion press, drying is made described welding rod, and wherein: the mass percent of coating and core wire is 36.5% and 63.5%.
3. high-temperature resistant low alloy steel welding rod for preparing according to the described method of claim 2, it is characterized in that its component and percetage by weight are: C:0.06%-0.15%, Si: S≤0.60%: P≤0.015%: Mn≤0.025%: Ni≤1.00% :≤0.40%, Cr:0.80-1.50%, Mo:0.60-1.30, V:0.20-0.35, all the other are Fe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010274671 CN101920412A (en) | 2010-09-07 | 2010-09-07 | High-temperature resistant low alloy steel electrode coating and electrode thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010274671 CN101920412A (en) | 2010-09-07 | 2010-09-07 | High-temperature resistant low alloy steel electrode coating and electrode thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101920412A true CN101920412A (en) | 2010-12-22 |
Family
ID=43335763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010274671 Pending CN101920412A (en) | 2010-09-07 | 2010-09-07 | High-temperature resistant low alloy steel electrode coating and electrode thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109093278A (en) * | 2018-09-13 | 2018-12-28 | 上海大西洋焊接材料有限责任公司 | A kind of non-alloyed steel electrode and preparation method thereof for carbon steel or low alloy steel |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59125294A (en) * | 1983-01-05 | 1984-07-19 | Kawasaki Steel Corp | Submerged arc welding method of heat resisting low alloy steel |
| US6114656A (en) * | 1997-06-20 | 2000-09-05 | Exxonmobil Upstream Research Company | Welding methods for producing ultra-high strength weldments with weld metals having excellent cryogenic temperature fracture toughness |
| CN1433869A (en) * | 2003-02-21 | 2003-08-06 | 安泰科技股份有限公司 | Low-alloy high-strength high-toughness electric welding rod |
| CN1706586A (en) * | 2004-06-07 | 2005-12-14 | 沈阳工业大学 | Ultralow carbon welding rod for welding heat resisting steel and stainless steel |
| CN101342650A (en) * | 2008-08-21 | 2009-01-14 | 中国船舶重工集团公司第七二五研究所 | Normalization anneal treatment resistant heat-resistant steel wire solder and use method thereof |
| CN101450430A (en) * | 2007-12-06 | 2009-06-10 | 上海焊接器材有限公司 | Coated electrode for welding nuclear material |
-
2010
- 2010-09-07 CN CN 201010274671 patent/CN101920412A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59125294A (en) * | 1983-01-05 | 1984-07-19 | Kawasaki Steel Corp | Submerged arc welding method of heat resisting low alloy steel |
| US6114656A (en) * | 1997-06-20 | 2000-09-05 | Exxonmobil Upstream Research Company | Welding methods for producing ultra-high strength weldments with weld metals having excellent cryogenic temperature fracture toughness |
| CN1433869A (en) * | 2003-02-21 | 2003-08-06 | 安泰科技股份有限公司 | Low-alloy high-strength high-toughness electric welding rod |
| CN1706586A (en) * | 2004-06-07 | 2005-12-14 | 沈阳工业大学 | Ultralow carbon welding rod for welding heat resisting steel and stainless steel |
| CN101450430A (en) * | 2007-12-06 | 2009-06-10 | 上海焊接器材有限公司 | Coated electrode for welding nuclear material |
| CN101342650A (en) * | 2008-08-21 | 2009-01-14 | 中国船舶重工集团公司第七二五研究所 | Normalization anneal treatment resistant heat-resistant steel wire solder and use method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109093278A (en) * | 2018-09-13 | 2018-12-28 | 上海大西洋焊接材料有限责任公司 | A kind of non-alloyed steel electrode and preparation method thereof for carbon steel or low alloy steel |
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Open date: 20101222 |