CN102091885B - Cr-Mo-Al series welding rod for low-alloy and high-strength steel - Google Patents
Cr-Mo-Al series welding rod for low-alloy and high-strength steel Download PDFInfo
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- CN102091885B CN102091885B CN201010621979A CN201010621979A CN102091885B CN 102091885 B CN102091885 B CN 102091885B CN 201010621979 A CN201010621979 A CN 201010621979A CN 201010621979 A CN201010621979 A CN 201010621979A CN 102091885 B CN102091885 B CN 102091885B
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Abstract
The invention discloses a Cr-Mo-Al series welding rod for low-alloy and high-strength steel, comprising a core wire and a coating, wherein the coating comprises the following components in percentage by weight: 32-42 percent of calcium oxide, 16-20 percent of calcium fluoride, 5-10 percent of titanium white, 8-12 percent of silicon dioxide, 3-5 percent of mid-carbon ferromanganese, 3-5 percent of ferromolybdenum, 4-6 percent of low-carbon ferromanganese, 3-4 percent of potassium oxide, 4-6 percent of sodium oxide, 2-3 percent ofaluminum oxide and 3-5 percent of copper. The welding rod provided by the invention has low manufacture cost, and the deposited metal of the welding rod has favorable mechanical property, welding performance and seawater corrosion resistance.
Description
Technical field
The invention belongs to technical field of welding materials, particularly, the present invention relates to a kind of Cr-Mo-Al series low-alloy high strength steel and use welding rod.
Background technology
At present, along with the go deep into development and utilization of the mankind to marine resources, steel construction piece required in the ocean engineering also day by day increases, if any: seawaterline, seawater heat exchanger, salt making equipment evaporimeter, seabed container and boats and ships underwater steel construction etc.Because marine environment is a kind of corrosive environment of complicacy, seawater itself is a kind of strong corrosive medium simultaneously, and wave, tide, stream have the reciprocal stress impact of low frequency to the steel member again in addition.This just needs one type of Seawate-corrosive-resisting steel that can be applied to above-mentioned environment; 10CrMoAl is exactly wherein a kind of; It belongs to the high-intensity seawater corrosion resistance special-purpose steel of Cr-Mo-A1 series low-alloy; Can be applicable to Coastal Power Station, coastal oil field, coastal natural gas and petrochemical plant conveyance conduit, seawater pipeline and nuclear power or the constant structure of container spare of pressure; Its chemical composition (mass percent) is: C :≤0.12%, Mn:0.35-0.65%, Si:0.25-0.50%, S: P≤0.025% :≤0.025%, Cr:0.80-1.20%, Al:0.40-0.80%, Mo:0.20-0.35%, Cu: Ni≤≤0.03% :≤≤0.03%, and all the other are Fe.
As with the supporting welding rod of Seawate-corrosive-resisting steel; Not only welding procedure, process and welder technology will satisfy corresponding standard and requirement, and welding material also must satisfy the requirement of postwelding deposited metal composition, mechanical property requirements and sea water corrosion resistant requirement etc.
Literature search through to prior art is found; The CN101148008A patent is the welding rod that is used for the corrosion-proof wear environment; Though range of application is wider, the required mineral powder of its preparation coating is various in style, and contains a large amount of noble metal compositions in the coating; Like nickel powder, rare earth, ferro-niobium and copper etc., it is cost an arm and a leg; The CN101288924A patent is wire rod, the welding wire that is specifically designed to the Q345C-NHY3 Seawate-corrosive-resisting steel, and is mainly used in submerged arc welding, is not suitable for the welding of manual repair welding or specific position, makes its range of application narrow; The CN1939649A patent then is the welding material that is specifically designed to wet method welding under water, but its contained corrosion resisting alloy element seldom, and its deposited metal is unfavorable for long-term use in marine environment.Find still do not have a kind of not only economy at present but also the welding rod of good mechanical performance and sea water corrosion resistant is arranged through above-mentioned retrieval.
Summary of the invention
The objective of the invention is to solve the problem that exists in the prior art, provide that a kind of preparation cost is low, the scope of application is wide, and the deposited metal of welding rod has a good mechanical performance in briny environment Cr-Mo-Al series low-alloy high strength steel is used welding rod.
Technical scheme of the present invention is: a kind of Cr-Mo-Al series low-alloy high strength steel is used welding rod; It comprises core wire and coating, and said coating is made up of following components in weight percentage content: calcium oxide 32～-42%, calcirm-fluoride 16～20%, titanium white powder 5～10%, silica 8～12%, mid-carbon fe-mn 3～5%, molybdenum-iron 3～5%, low-carbon ferromanganese 4～6%, potassium oxide 3～4%, sodium oxide molybdena 4～6%, aluminium oxide 2～3% and copper 3～5%.
The preparation method of said welding rod is: the coating component that takes by weighing following weight percentage: calcium oxide 32～-42%, calcirm-fluoride 16～20%, titanium white powder 5～10%, silica 8～12%, mid-carbon fe-mn 3～5%, molybdenum-iron 3～5%, low-carbon ferromanganese 4～6%, potassium oxide 3～4%, sodium oxide molybdena 4～6%, aluminium oxide 2～3% and copper 3～5%; Mixing the back adds 16～18% the waterglass account for said coating gross weight and makes binding agent; Mixture is coated in outside the core wire; Suppress through the hydraulic type electrode extrusion press then; Dried 1 hour for 150 ℃ at low temperature, and then high temperature 350-400 ℃ dried 0.5 hour.
Preferably, to account for the mass percent of welding rod be 28～30% to said coating.
Preferably, said core wire adopts H08A or H0gE.
The invention has the beneficial effects as follows: (1) because each reasonable mixture ratio of components in the coating, make welding bead smooth, have good removing slag property, fusion good, open defects such as no slag inclusion, pore, macroscopic cracking have more good welding technological properties.(2) welding rod of the present invention not only can be used for the welding that Cr-Mo-Al is the anti-seawater corrosion steel part, and equally also can be used for Cr-Mo-Cu is the welding of anti-seawater corrosion steel part, has to use widely and practical value.(3) manufacturing cost of welding rod of the present invention helps enterprise to reduce production costs, improve product quality and production efficiency.
The specific embodiment
Elaborate in the face of embodiments of the invention down, for embodiment being to implement under the prerequisite with technical scheme of the present invention, provided detailed embodiment and operating process particularly, but protection scope of the present invention is not limited to following embodiment.
Embodiment 1
Electrode coating in the present embodiment is made up of following components in weight percentage content: calcium oxide 33%, calcirm-fluoride 20%, titanium white powder 8%, silica 1 1%, mid-carbon fe-mn 3%, molybdenum-iron 4%, low-carbon ferromanganese 5%, potassium oxide 4%, sodium oxide molybdena 5%, aluminium oxide 3% and copper 4%; Above-mentioned each component is mixed the back to add 17% the waterglass account for said coating gross weight and makes binding agent; Mixture is coated in outside the core wire; Suppress through the hydraulic type electrode extrusion press then; Dried 1 hour for 150 ℃ at low temperature, and then high temperature 350-400 ℃ dried 0.5 hour.
Embodiment 2
Electrode coating in the present embodiment is made up of following components in weight percentage content: calcium oxide 36%, calcirm-fluoride 18%, titanium white powder 7%, silica 9%, mid-carbon fe-mn 4%, molybdenum-iron 5%, low-carbon ferromanganese 5%, potassium oxide 4%, sodium oxide molybdena 6%, aluminium oxide 2% and copper 4%; Above-mentioned each component is mixed the back to add 17% the waterglass account for said coating gross weight and makes binding agent; Mixture is coated in outside the core wire; Suppress through the hydraulic type electrode extrusion press then; Dried 1 hour for 150 ℃ at low temperature, and then high temperature 350-400 ℃ dried 0.5 hour.
Embodiment 3
Electrode coating in the present embodiment is made up of following components in weight percentage content: calcium oxide 41%, calcirm-fluoride 16%, titanium white powder 6%, silica 8%, mid-carbon fe-mn 4%, molybdenum-iron 4%, low-carbon ferromanganese 6%, potassium oxide 3%, sodium oxide molybdena 5%, aluminium oxide 2% and copper 5%; Above-mentioned each component is mixed the back to add 17% the waterglass account for said coating gross weight and makes binding agent; Mixture is coated in outside the core wire; Suppress through the hydraulic type electrode extrusion press then; Dried 1 hour for 150 ℃ at low temperature, and then high temperature 350-400 ℃ dried 0.5 hour.
The percetage by weight of the deposited metal component of welding rod of the present invention is: carbon≤0.12%, manganese≤0.80%, silicon≤0.60%, sulphur≤0.035%, phosphorus≤0.040%, chromium 0.30～0.60%, copper 0.20～0.50%, molybdenum 0.30～0.60%, all the other are iron.
It is the H08A core wire of Φ 4mm that embodiment 1-3 all adopts diameter; Weld the 10CrMoAl steel plate respectively with the welding rod for preparing among the embodiment 1-3 (welding rod sequence number difference 1,2,3); The chemical composition of the deposited metal of welding rod and weight percentage thereof (%) see also table two; The specification of 10CrMoAl steel plate is 45 * 200 * 700 (mm), and the chemical composition of 10CrMoAl steel plate and weight percentage thereof (%) see also table one;
Table one
Groove size, sample position and test method etc. are all implemented by the regulation of standard GB/T5118.
Table two
The mechanical property of the deposited metal of the welding rod that embodiment 1-3 makes sees also table three.
| Sequence number | Yield strength (N/mm 2) | Hot strength (N/mm 2) | Percentage elongation (%) | Ballistic work (J) |
| 1 | 390 | 516 | 30 | 35 |
| 2 | 405 | 543 | 26 | 30 |
| 3 | 397 | 530 | 27 | 32 |
Table three
The deposited metal (sequence number is respectively a, b, c) of the welding rod that embodiment of the invention 1-3 is made and sea water resistance steel 10CrMoAl plate carry out spontaneous potential and measure the contrast experiment; (test platform is placed on below the mean low-water on 0.5～1.5mm) and carries out soaking corrosion testing apparatus entirely in this experiment; Corrosive medium is a natural sea-water; 30 ± 2 ℃ of test temperatures, the test period is 31 days.Adopt digital voltmeter and saturated KCl calomel reference electrode in the test, measure the spontaneous potential of 2 materials in seawater every day.Test result sees also table four.
Table four
Contrast experiment's result be the welding rod that makes of the present invention deposited metal than the current potential of mother metal (Seawate-corrosive-resisting steel 10CrMoAl) slightly just, meet the requirement that welding material is selected in the corrosive environment of sea water.
Claims (5)
1. a Cr-Mo-Al series low-alloy high strength steel is used welding rod; It comprises core wire and coating, it is characterized in that: said coating is made up of following components in weight percentage content: calcium oxide 32 ~ 42%, calcirm-fluoride 16 ~ 20%, titanium white powder 5 ~ 10%, silica 8 ~ 12%, mid-carbon fe-mn 3 ~ 5%, molybdenum-iron 3 ~ 5%, low-carbon ferromanganese 4 ~ 6%, potassium oxide 3 ~ 4%, sodium oxide molybdena 4 ~ 6%, aluminium oxide 2 ~ 3% and copper 3 ~ 5%.
2. Cr-Mo-Al series low-alloy high strength steel according to claim 1 is used welding rod; It is characterized in that: the preparation method of said welding rod is: the coating component that takes by weighing following weight percentage: calcium oxide 32 ~ 42%, calcirm-fluoride 16 ~ 20%, titanium white powder 5 ~ 10%, silica 8 ~ 12%, mid-carbon fe-mn 3 ~ 5%, molybdenum-iron 3 ~ 5%, low-carbon ferromanganese 4 ~ 6%, potassium oxide 3 ~ 4%, sodium oxide molybdena 4 ~ 6%, aluminium oxide 2 ~ 3% and copper 3 ~ 5%; Mixing the back adds 16 ~ 18% the waterglass account for said coating gross weight and makes binding agent; Mixture is coated in outside the core wire; Suppress through the hydraulic type electrode extrusion press then; Dried 1 hour for 150 ℃ at low temperature, and then high temperature 350-400 ℃ dried 0.5 hour.
3. Cr-Mo-Al series low-alloy high strength steel according to claim 2 is used welding rod, it is characterized in that: the mass percent that said coating accounts for welding rod is 28 ~ 30%.
4. Cr-Mo-Al series low-alloy high strength steel according to claim 2 is used welding rod, it is characterized in that: said core wire adopts H08A or H08E.
5. Cr-Mo-Al series low-alloy high strength steel according to claim 2 is used welding rod; It is characterized in that; It is anti-seawater corrosion steel special welding rod as Cr-Mo-Al that said Cr-Mo-Al series low-alloy high strength steel uses welding rod; Its deposited metal percetage by weight is: C: Mn≤0.12%: Si≤0.80%: S≤0.60%: P≤0.035% :≤0.040%, Cr:0.30-0.60%, Cu:0.20-0.50%, Mo:0.30-0.60%, all the other are Fe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010621979A CN102091885B (en) | 2010-12-31 | 2010-12-31 | Cr-Mo-Al series welding rod for low-alloy and high-strength steel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010621979A CN102091885B (en) | 2010-12-31 | 2010-12-31 | Cr-Mo-Al series welding rod for low-alloy and high-strength steel |
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| Publication Number | Publication Date |
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| CN102091885A CN102091885A (en) | 2011-06-15 |
| CN102091885B true CN102091885B (en) | 2012-10-03 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103878506B (en) * | 2013-11-29 | 2016-03-09 | 中国船舶重工集团公司第七二五研究所 | A kind of low-intensity high-tenacity heat-resistant steel electrode |
| CN105328363A (en) * | 2015-12-02 | 2016-02-17 | 四川西冶新材料有限公司 | High-strength, high-toughness and seawater corrosion-resistant welding rod for ocean engineering |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0767029A1 (en) * | 1995-09-08 | 1997-04-09 | Natunicon Trading Limited | Electrode for welding high alloy steels |
| CN1285256A (en) * | 1999-08-23 | 2001-02-28 | 大连理工大学 | Preparation of low Cr and high Mn austenitic steel welding bar for hand electric arc-welding |
| 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 |
| CN101362258A (en) * | 2008-09-25 | 2009-02-11 | 哈尔滨工业大学 | Novel electric welding rod |
| CN101658986A (en) * | 2009-09-18 | 2010-03-03 | 武汉铁锚焊接材料股份有限公司 | Build-up welding rod for repairing Cr3 roller and build-up welding method |
-
2010
- 2010-12-31 CN CN201010621979A patent/CN102091885B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0767029A1 (en) * | 1995-09-08 | 1997-04-09 | Natunicon Trading Limited | Electrode for welding high alloy steels |
| CN1285256A (en) * | 1999-08-23 | 2001-02-28 | 大连理工大学 | Preparation of low Cr and high Mn austenitic steel welding bar for hand electric arc-welding |
| 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 |
| CN101362258A (en) * | 2008-09-25 | 2009-02-11 | 哈尔滨工业大学 | Novel electric welding rod |
| CN101658986A (en) * | 2009-09-18 | 2010-03-03 | 武汉铁锚焊接材料股份有限公司 | Build-up welding rod for repairing Cr3 roller and build-up welding method |
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| CN102091885A (en) | 2011-06-15 |
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