CN108274100A - The welding method of oil cylinder of hydraulic support stainless joint seat - Google Patents
The welding method of oil cylinder of hydraulic support stainless joint seat Download PDFInfo
- Publication number
- CN108274100A CN108274100A CN201810383662.XA CN201810383662A CN108274100A CN 108274100 A CN108274100 A CN 108274100A CN 201810383662 A CN201810383662 A CN 201810383662A CN 108274100 A CN108274100 A CN 108274100A
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- CN
- China
- Prior art keywords
- welding
- joint seat
- welded
- hydraulic support
- stainless joint
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- 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.)
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Classifications
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- 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
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/167—Arc welding or cutting making use of shielding gas and of a non-consumable electrode
Abstract
The invention discloses a kind of welding methods of oil cylinder of hydraulic support stainless joint seat：It is welded using MAG, selects 80%Ar+20%CO2Mixed gas selects low-alloy high-strength steel welding wire as protective gas；Stainless joint seat to be welded is preheated to 250 ~ 300 DEG C, controls 210 ± 10A of welding current, 23 ± 1V of weldingvoltage, 400 ~ 500mm/min of speed of welding carries out bottoming welding；Temperature controls 240 ± 10A of welding current, 25 ± 1V of weldingvoltage, 500 ~ 700mm/min of speed of welding are filled welding at 250 ~ 400 DEG C between keeping welding bead.The present invention is welded using MAG, and welding manner is identical with the welding manner of the other components of hydraulic support, and it is relatively easy that range request is crossed in welding, does not have to replace welding equipment and protective gas, convenient for the tissue of welding production；Welding material selects low-alloy high-strength steel welding wire welding, can not only improve the intensity and toughness of welding point, but also reduce the cost of welding material；Solve many welding problems such as the weld defect that stainless joint seat often occurs in the welding process is more, weld strength is low, heat affected area hardness height.
Description
Technical field
The present invention relates to a kind of welding methods of stainless steel, more particularly, to a kind of oil cylinder of hydraulic support stainless joint seat
Welding method.
Background technology
Currently, column, jack connector seat material that domestic hydraulic support producer is produced are common carbon steel or conjunction
Jin Gang, corrosion resistance is poor, and column thousand caused by corrosion often occurs at the endoporus sealing during being on active service in oil cylinder
The jin top phenomenon of leakage, makes holder cisco unity malfunction.And in holder overhaul, generally require to replace a large amount of plinth, increase
The cleaning of hydraulic system, the replacement frequency of sealing element cause great cost waste and the extension of maintenance cycle.To solve this
One problem, it is desirable that plinth must have higher corrosion resistance：A kind of method is to be chemically treated existing plinth, is increased
Anti-corrosion coating；Another method is to replace connector seat material, uses stainless steel.Chemically treated process is carried out to existing plinth
It is longer, and welding performance is poor, overall cost is higher, so it is optimal selection that plinth material, which is changed to stainless steel,.But often
The yield strength for advising austenitic stainless steel is relatively low, cannot meet plinth strength demand.Novel sorbite stainless steel has height
The characteristic of intensity, low yield strength ratio, high-elongation and highly corrosion resistant can meet the requirement of plinth.But to this novel
Stainless steel deficiency is studied in terms of weldability.Due to the particularity of oil cylinder of hydraulic support, toughness, the plasticity of Welded Joints etc.
Mechanical performance has a higher design requirement, therefore the welding method to this novel stainless Steel material, the matching of welding material, material
Material hardenability, the solderable Journal of Sex Research such as property of welded joint are to ensure that welding point mechanical performance meets it in the weight of design requirement
Weight.Following table is the chemical composition of this kind of stainless steel：（Unit：Mass fraction, %）
Invention content
The purpose of the present invention is to provide the oil cylinder of hydraulic support that a kind of mechanical performance of welding point meets design requirement
The welding method of stainless joint seat.
To achieve the above object, the present invention can take following technical proposals：
The welding method of oil cylinder of hydraulic support stainless joint seat of the present invention, including following specific steps：
The first step is welded using MAG, selects 80%Ar+20%CO2Mixed gas selects low-alloy high-strength steel weldering as protective gas
Silk；
Stainless joint seat to be welded is preheated to 250 ~ 300 DEG C by second step, controls 210 ± 10A of welding current, welding electricity
23 ± 1V, 400 ~ 500mm/min of speed of welding is pressed to carry out bottoming welding；
Third walks, and temperature controls 240 ± 10A of welding current, 25 ± 1V of weldingvoltage, welding at 250 ~ 400 DEG C between keeping welding bead
500 ~ 700mm/min of speed is filled welding.
The chemical composition of the low-alloy high-strength steel welding wire is：C≤0.10%, Si：0.40-0.82%, Mn：1.00-
1.30%, Ni：0.20-0.80%, Cu≤0.20%, S≤0.001%, P≤0.010%.
Advantages of the present invention is embodied in the following aspects：
1, it is welded, is used using MAG（80%Ar+20%CO2）Mixed gas protected, the small amounts gas of addition can reduce liquid
Metallic surface tension stablizes cathode protection, makes welding arc not Dutch roll, improve the stability of electric arc and the stream of molten pool metal
Dynamic property, so as to improve appearance of weld, and the fusion penetration bigger of weld seam, the binding force of weld seam are stronger.This welding manner and liquid
Press the welding manner of the other components of holder identical, it is relatively easy that range request is crossed in welding, does not have to replace welding equipment and protective gas,
Convenient for the tissue of welding production.
2, welding material selects low-alloy high-strength steel welding wire welding, can both improve the intensity and toughness of welding point, especially
It is welding point yield strength and tensile strength be greatly improved, it is ensured that comprehensive mechanical performance had both met design and had wanted
It asks, and reduces the cost of welding material；Solve the weld defect that stainless joint seat often occurs in the welding process it is more,
Many welding problems such as low, the heat affected area hardness height of weld strength.
3, in specific welding, since the weldability of new type stainless steel. corrosion resistance compares close to martensitic stain less steel , temper tendency firmly
Obviously, more sensitive to cold crack.Applicant is furtherd investigate by the Cold Cracking Susceptibility to new type stainless steel. corrosion resistance, as a result
Show plinth to be welded being preheated to 250 DEG C ~ 300 DEG C of temperature, so that it may to effectively prevent the generation of welding cold cracking；Together
When applicant define that temperature is not less than 250 DEG C between plinth welding bead to be welded, you can prevent Re Ying Xiang Qu temper sclerous tissues
It generates；When temperature control is at 250-400 DEG C between welding bead, the AKV of welding point weld metal and heat affected area–20℃It is held in
In one higher level.
Specific implementation mode
More detailed explanation, but protection scope of the present invention are done to welding method of the present invention below by specific embodiment
It is not limited to following embodiments.
The present invention stainless joint seat to be welded（The high-strength stainless structural steel S600E of sorbite）Chemical composition be（It is single
Position：Mass fraction, %）：
Embodiment 1
The welding method of oil cylinder of hydraulic support stainless joint seat of the present invention, including following specific steps：
The first step is welded using MAG, selects 80%Ar+20%CO2Mixed gas selects low-alloy high-strength steel weldering as protective gas
Silk, the chemical composition of the welding wire are（Unit：Mass fraction, %）：C≤0.10%, Si：0.40-0.82%, Mn：1.00-1.30%,
Ni：0.20-0.80%, Cu≤0.20%, S≤0.001%, P≤0.010%；
Stainless joint seat to be welded is preheated to 250 DEG C by second step, controls welding current 200A, weldingvoltage 22V, weldering
It meets speed 400mm/min and carries out bottoming welding；
Third walks, and temperature controls welding current 230A, weldingvoltage 24V, speed of welding 500mm/ at 250 DEG C between keeping welding bead
Min is filled welding.
After tested, the physical and chemical index of the welding point is：
Data can be seen that intensity and strength of parent of welding point etc. by force from upper table, meet hydraulic support plinth
Intensity requirement；Welding point bend specimen is intact, the weld metal zone of welding point, and there are identical elongation in fusion area and heat affected area
Rate does not occur hardened structure in welding point.- 20 DEG C of ballistic works of weld dimensions are all higher than hydraulic support manufacture mark
It is not less than the requirement of 27J in standard.Therefore it can meet oil cylinder of hydraulic support using the property of welded joint of the method for the present invention welding and connect
The requirement of headstock.
Embodiment 2
The welding method of oil cylinder of hydraulic support stainless joint seat of the present invention, including following specific steps：
The first step is welded using MAG, selects 80%Ar+20%CO2Mixed gas is welded as protective gas using low-alloy high-strength steel
Silk, the chemical composition of the welding wire are（Unit：Mass fraction, %）：C≤0.10%, Si：0.40-0.82%, Mn：1.00-1.30%,
Ni：0.20-0.80%, Cu≤0.20%, S≤0.001%, P≤0.010%；
Stainless joint seat to be welded is preheated to 300 DEG C by second step, controls welding current 220A, weldingvoltage 24V, weldering
It meets speed 450mm/min and carries out bottoming welding；
Third walks, and temperature controls welding current 250A, weldingvoltage 26V, speed of welding 700mm/ at 400 DEG C between keeping welding bead
Min is filled welding.
After tested, the physical and chemical index of the welding point is：
It is strong to can be seen that intensity and strength of parent of welding point etc. from upper table data, meets the strong of hydraulic support plinth
Degree requires；Welding point bend specimen is intact, the weld metal zone of welding point, and there are identical elongation in fusion area and heat affected area
Rate does not occur hardened structure in welding point.- 20 DEG C of ballistic works of weld dimensions are all higher than hydraulic support manufacture mark
It is not less than the requirement of 27J in standard.Therefore it can meet oil cylinder of hydraulic support using the property of welded joint of the method for the present invention welding and connect
The requirement of headstock.
Claims (2)
1. a kind of welding method of oil cylinder of hydraulic support stainless joint seat, it is characterised in that：Including following specific steps：
The first step is welded using MAG, selects 80%Ar+20%CO2Mixed gas selects low-alloy high-strength steel weldering as protective gas
Silk；
Stainless joint seat to be welded is preheated to 250 ~ 300 DEG C by second step, controls 210 ± 10A of welding current, welding electricity
23 ± 1V, 400 ~ 500mm/min of speed of welding is pressed to carry out bottoming welding；
Third walks, and temperature controls 240 ± 10A of welding current, 25 ± 1V of weldingvoltage, welding at 250 ~ 400 DEG C between keeping welding bead
500 ~ 700mm/min of speed is filled welding.
2. the welding method of oil cylinder of hydraulic support stainless joint seat according to claim 1, it is characterised in that：It is described low
The chemical composition of alloy high-strength steel welding wire is：C≤0.10%, Si：0.40-0.82%, Mn：1.00-1.30%, Ni：0.20-
0.80%, Cu≤0.20%, S≤0.001%, P≤0.010%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810383662.XA CN108274100B (en) | 2018-04-26 | 2018-04-26 | Welding method of stainless steel joint seat of hydraulic support oil cylinder |
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| CN201810383662.XA CN108274100B (en) | 2018-04-26 | 2018-04-26 | Welding method of stainless steel joint seat of hydraulic support oil cylinder |
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| CN108274100A true CN108274100A (en) | 2018-07-13 |
| CN108274100B CN108274100B (en) | 2020-06-16 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114833487A (en) * | 2022-03-22 | 2022-08-02 | 安阳钢铁股份有限公司 | Welding method for 1000MPa steel for coal mine hydraulic support |
| CN115533259A (en) * | 2022-11-09 | 2022-12-30 | 郑州煤矿机械集团股份有限公司 | Method for restraining lack of narrow gap welding seam of oil cylinder of coal mine hydraulic support |
| CN115635169A (en) * | 2022-11-15 | 2023-01-24 | 郑煤机智鼎液压有限公司 | High-reliability welding method for high-pressure oil cylinder accessory and hydraulic oil cylinder |
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| JPH08206861A (en) * | 1995-02-02 | 1996-08-13 | Sumitomo Metal Ind Ltd | Manufacture of martensite stainless steel welded tube |
| CN1974101A (en) * | 2006-12-19 | 2007-06-06 | 郑州煤矿机械集团有限责任公司 | Method of welding low alloy high strength steel |
| CN101176942A (en) * | 2007-12-03 | 2008-05-14 | 鞍钢重型机械有限责任公司金属结构厂 | Method for welding OCr13Ni5Mo low-carbon martensitic stainless steel |
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| CN102528241A (en) * | 2012-02-15 | 2012-07-04 | 重庆大江工业有限责任公司 | Method for welding high-strength steel hydraulic support member |
| CN102941394A (en) * | 2012-11-15 | 2013-02-27 | 武汉船用机械有限责任公司 | Method for overlaying welding of duplex stainless steel |
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2018
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Patent Citations (6)
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|---|---|---|---|---|
| JPH08206861A (en) * | 1995-02-02 | 1996-08-13 | Sumitomo Metal Ind Ltd | Manufacture of martensite stainless steel welded tube |
| CN1974101A (en) * | 2006-12-19 | 2007-06-06 | 郑州煤矿机械集团有限责任公司 | Method of welding low alloy high strength steel |
| CN101176942A (en) * | 2007-12-03 | 2008-05-14 | 鞍钢重型机械有限责任公司金属结构厂 | Method for welding OCr13Ni5Mo low-carbon martensitic stainless steel |
| CN101972878A (en) * | 2010-10-12 | 2011-02-16 | 中国化学工程第七建设有限公司 | Process for welding duplex stainless steel |
| CN102528241A (en) * | 2012-02-15 | 2012-07-04 | 重庆大江工业有限责任公司 | Method for welding high-strength steel hydraulic support member |
| CN102941394A (en) * | 2012-11-15 | 2013-02-27 | 武汉船用机械有限责任公司 | Method for overlaying welding of duplex stainless steel |
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| 黄云桂等: "12Cr13马氏体不锈钢的焊接工艺", 《焊接技术》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114833487A (en) * | 2022-03-22 | 2022-08-02 | 安阳钢铁股份有限公司 | Welding method for 1000MPa steel for coal mine hydraulic support |
| CN115533259A (en) * | 2022-11-09 | 2022-12-30 | 郑州煤矿机械集团股份有限公司 | Method for restraining lack of narrow gap welding seam of oil cylinder of coal mine hydraulic support |
| CN115533259B (en) * | 2022-11-09 | 2023-08-22 | 郑州煤矿机械集团股份有限公司 | Narrow-gap weld defect suppression method for hydraulic support cylinder of coal mine |
| CN115635169A (en) * | 2022-11-15 | 2023-01-24 | 郑煤机智鼎液压有限公司 | High-reliability welding method for high-pressure oil cylinder accessory and hydraulic oil cylinder |
| CN115635169B (en) * | 2022-11-15 | 2023-07-21 | 郑煤机智鼎液压有限公司 | High-pressure oil cylinder accessory welding method and hydraulic oil cylinder |
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| CN108274100B (en) | 2020-06-16 |
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Effective date of registration: 20200724 Address after: 450016 No. ninth, 167 Avenue, Zhengzhou economic and Technological Development Zone, Henan Co-patentee after: Zhengmei Zhiding Hydraulic Co., Ltd Patentee after: ZHENGZHOU COAL MINING MACHINERY GROUP Co.,Ltd. Address before: 450016 No. ninth, 167 Avenue, Zhengzhou economic and Technological Development Zone, Henan Patentee before: ZHENGZHOU COAL MINING MACHINERY GROUP Co.,Ltd. |
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