CN101850460A - Welding process of 12Cr1MoV high-pressure pipeline CO2 semiautomatic or automatic gas shielded welding - Google Patents
Welding process of 12Cr1MoV high-pressure pipeline CO2 semiautomatic or automatic gas shielded welding Download PDFInfo
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- CN101850460A CN101850460A CN 201010181025 CN201010181025A CN101850460A CN 101850460 A CN101850460 A CN 101850460A CN 201010181025 CN201010181025 CN 201010181025 CN 201010181025 A CN201010181025 A CN 201010181025A CN 101850460 A CN101850460 A CN 101850460A
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Abstract
The invention relates to a welding process of 12Cr1MoV high-pressure pipeline CO2 semiautomatic or automatic gas shielded welding, which comprises the following steps of: processing two welded steel pipes into a V-shaped bevel, and fixing the two welded steel pipes by a clamp; heating by an electric heater, preserving heat through heat-preserving cotton, and preheating a joint; immediately carrying out pairing and positioned welding on the welded joint; carrying out manual tungsten argon arc welding priming coat welding by using a solid welding wire TIG-R31; keeping the interlayer temperature between 200 DEG C and 300 DEG C, and carrying out multilayer multi-pass welding by adopting melting pole automatic or semiautomatic CO2 gas shielded welding; and carrying out heat processing after welding. The welding efficiency of the invention is 2-3 times that of welding rod arc welding, and the welding cost is 50% of that of the welding rod arc welding; the qualified rate of welding seam flaw detection is high, and the welding quality is stable.
Description
Technical field
The present invention relates to welding field, relate in particular to the Mayari welding technology field.
Background technology
Domestic GTAW bottoming and the welding rod arc welding method of generally adopting of 12Cr1MoV pressure piping welds now, increasing along with Sinopec's plant capacity, the high temperature high pressure large caliber 12Cr1MoV posted sides pipeline quantity of supporting power system device increases, this kind welding procedure welding efficiency is low, welder's labour intensity is big, the welding quality instability is easy to occur weld porosity, slag inclusion, not fusion, localized cracks and weld defect such as penetrate.
Summary of the invention
The objective of the invention is in order to overcome problems of the prior art, a kind of 12Cr1MoV pressure piping CO is provided
2Semi-automatic or automatic gas shielded welding welding procedure.
12Cr1MoV pressure piping CO of the present invention
2Semi-automatic or automatic gas shielded welding welding procedure:
A, the effective mechanical means of two-phase welding steel is processed into V-butt, the dirt in two-phase welding steel pipe bevel surface and the bevelled edge 50～100mm scope is cleaned out, utilize anchor clamps that the steel pipe of two-phase weldering is fixed;
B, employing electric heater heat, and the heat-preservation cotton insulation is carried out preheating to this joint;
Behind c, the dismounting electric heater, the group of carrying out welding point immediately is to reaching tack welding;
D, employing solid welding wire TIG-R31 carry out the welding of GTAW prime coat; Keep interlayer temperature in 200～300 ℃, adopt the automatic or semi-automatic CO of consumable electrode immediately
2The gas shielded arc welding multi-pass welding connects; Postwelding is heat-treated.
Described preheat temperature is 250～300 ℃.
Described two-phase welded tube groove angle α is 55～60 °, and the gap of two-phase welding steel pipe two steel pipe welding end surface is 2.0～3.0mm.
Carry out 720～750 ℃ of heat treatment temperatures after the described welding, temperature retention time 1～1.2 hour.
The present invention compared with prior art has the following advantages:
1, welding efficiency is 2～3 times of SMAWs, and welding cost is 50% of a SMAW.
2, seam inspection qualification rate height, welding quality stable.
The specific embodiment
12Cr1MoV pressure piping CO
2Detailed step semi-automatic or the automatic gas shielded welding welding procedure is as follows:
1, get the 12Cr1MoV high-voltage tube of φ 273 * 18mm, groove type finished edge as shown in Figure 1, the angle of groove is that α is 55～60 °, and root face p is 0.5～1.0mm, and the gap b of two steel pipe welding end surface is 2.0～3.0mm.
2, adopt magnetic surface lossless detection method that groove face is detected, flawless is qualified, and the dirt in two-phase welding steel pipe bevel surface and the cut both sides of the edge 50～100mm scope is cleaned out;
3, utilize anchor clamps that the steel pipe of two-phase weldering is fixed.
4, heating can be adopted flame, heating furnace or crawler belt heating, and the heat-preservation cotton insulation is carried out preheating to this joint, pre-heat rating is apart from bevelled edge 3 δ (δ-be the wall thickness of the thicker steel pipe of two-phase welding steel pipe) mm, and be not less than 100mm, 250～300 ℃ of preheat temperatures, and be incubated 10～20min.
5, the group of welding point is to reaching tack welding: the gap of two-phase welding steel pipe welding end surface is 2.0～3.0mm, and tack welding adopts the GTAW method, tack welding fusion length 50～80mm, weldering meat thickness 3～4mm, spacing 200～250mm.
6, be lower than below 200 ℃ as if the welding point temperature behind the tack welding, after adopting oxy-acetylene flame to be preheating to 220～240 ℃ once more, adopt GTAW to carry out the prime coat welding immediately, adopt solid welding wire model ER55-B2MnV (TIG-R31), gage of wire φ 2.5mm, purity of argon 〉=99.99%, adopt the straight polarity direct current electric power polarity, welding current 120～150A, weldingvoltage 14～17V, speed of welding 5～7cm/min, argon flow amount 8～12L/m, welding one deck.
7, the prime coat welding finishes, and clears up the welding bead surface immediately, and after the passed examination, will adopt the joint for pipe of consumable electrode CO2 gas-shield automatic welding to transport on the automatic weldering welding stand.
8, check backing run and be lower than below 200 ℃ once more apart from 50mm place, cut edge temperature, adopt oxy-acetylene flame to be preheating to 220～240 ℃ once more after, adopt the automatic or semi-automatic CO of consumable electrode immediately
2Gas shielded arc welding carries out other layer welding, adopts flux-cored wire model E551T1-G (SQR312), gage of wire φ 1.2mm.
9, semi-automatic CO
2Gas shielded arc welding block welding technique parameter: CO
2Purity 〉=99.8% adopts the dc reverse connection electric power polarity, welding current 150～220A, weldingvoltage 21～26V, speed of welding 12～15cm/min, CO
2Gas flow 14～17L/min keeps 220～240 ℃ of interlayer temperatures, welds three layers, is as the criterion with φ 273 * 18mm butt welded joint.
10, automatic CO
2Gas shielded arc welding block welding technique parameter: CO
2Purity 〉=99.8% adopts the dc reverse connection electric power polarity, welding current 160～220A, weldingvoltage 21～26V, speed of welding 11～15cm/min, CO
2Gas flow 16～20L/min keeps 220～240 ℃ of interlayer temperatures, welds three layers, is as the criterion with φ 273 * 18mm butt welded joint.
11, welding finishes, and clear up the welding bead surface immediately, and after the passed examination, welding point is heated to 200～300 ℃, and constant temperature was incubated slow cooling after 1 hour.
12, carry out magnetic and ray Non-Destructive Testing after 24 hours.
13, Non-Destructive Testing is carried out post weld heat treatment after qualified, and the post weld heat treatment temperature is 735～742 ℃, constant temperature time 1.0 hours.
14, carried out welding point cracking resistance test, result of the test is qualified.
15, carried out welding point stretching, bending, impact test, metal lographic examination, Hardness Surveillance, mother metal and weld metal chemical analysis, every test is all qualified.
Claims (4)
1.12Cr1MoV pressure piping CO
2Semi-automatic or automatic gas shielded welding welding procedure:
A, the effective mechanical means of two-phase welding steel is processed into V-butt, the dirt in two-phase welding steel pipe bevel surface and the bevelled edge 50～100mm scope is cleaned out, utilize anchor clamps that the steel pipe of two-phase weldering is fixed;
B, employing electric heater heat, and the heat-preservation cotton insulation is carried out preheating to this joint;
Behind c, the dismounting electric heater, the group of carrying out welding point immediately is to reaching tack welding;
D, employing solid welding wire TIG-R31 carry out the welding of GTAW prime coat; Keep interlayer temperature in 200～300 ℃, adopt the automatic or semi-automatic CO of consumable electrode immediately
2The gas shielded arc welding multi-pass welding connects; Postwelding is heat-treated.
2. 12Cr1MoV pressure piping CO as claimed in claim 1
2Semi-automatic or automatic gas shielded welding welding procedure, it is characterized in that: described preheat temperature is 250～300 ℃.
3. 12Cr1MoV pressure piping CO as claimed in claim 1
2Semi-automatic or automatic gas shielded welding welding procedure, it is characterized in that: described two-phase welded tube groove angle α is 55～60 °, and the gap of two-phase welding steel pipe two steel pipe welding end surface is 2.0～3.0mm.
4. 12Cr1MoV pressure piping CO as claimed in claim 1
2Semi-automatic or automatic gas shielded welding welding procedure is characterized in that: carry out 720～750 ℃ of heat treatment temperatures after the described welding, temperature retention time 1～1.2 hour.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010181025 CN101850460A (en) | 2010-05-21 | 2010-05-21 | Welding process of 12Cr1MoV high-pressure pipeline CO2 semiautomatic or automatic gas shielded welding |
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| CN 201010181025 CN101850460A (en) | 2010-05-21 | 2010-05-21 | Welding process of 12Cr1MoV high-pressure pipeline CO2 semiautomatic or automatic gas shielded welding |
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Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102019481A (en) * | 2010-11-30 | 2011-04-20 | 武昌船舶重工有限责任公司 | Plain butt welding process for high-strength hull structural steel |
| CN102114577A (en) * | 2010-12-17 | 2011-07-06 | 陕西国德电气制造有限公司 | One-time welding method |
| CN102463406A (en) * | 2010-11-10 | 2012-05-23 | 沈阳鼓风机集团股份有限公司 | Welding process of heat-resistant steel cylindrical housing |
| CN102489888A (en) * | 2011-11-29 | 2012-06-13 | 武汉船用机械有限责任公司 | Welding method for high-strength steel truss-type cantilever crane |
| CN102756218A (en) * | 2011-04-27 | 2012-10-31 | 五冶集团上海有限公司 | Benzene hydrogenation engineering heat resistant steel pipeline welding method |
| CN102848048A (en) * | 2012-09-07 | 2013-01-02 | 龙口中集来福士海洋工程有限公司 | Pipeline welding method |
| CN102873436A (en) * | 2012-10-30 | 2013-01-16 | 西安泵阀总厂有限公司 | Method for welding insulated joint bottoming |
| CN102962557A (en) * | 2012-11-06 | 2013-03-13 | 哈尔滨汽轮机厂有限责任公司 | Method for welding balancing air leakage pipe of medium-high pressure outer cylinder in turbine |
| CN104259632A (en) * | 2014-07-10 | 2015-01-07 | 扬帆集团股份有限公司 | Tail fin welding process of 10000-ton level bulk cargo ship |
| CN103447670B (en) * | 2013-09-03 | 2015-09-30 | 上海振华重工(集团)股份有限公司 | High-strength steel Q690E double-wire MAG welding connects process |
| CN105364276A (en) * | 2015-10-31 | 2016-03-02 | 江苏振光电力设备制造有限公司 | Welding machining technology of high-strength-steel steel pipe tower |
| CN106180981A (en) * | 2016-08-05 | 2016-12-07 | 中铁十八局集团第四工程有限公司 | The CO of super large caliber steel pipe2gas protection welding process |
| CN107378207A (en) * | 2017-07-26 | 2017-11-24 | 南通振华重型装备制造有限公司 | A kind of 4130 high-voltage tube high-efficiency welding methods |
| CN108817610A (en) * | 2018-09-07 | 2018-11-16 | 中国能源建设集团安徽电力建设第工程有限公司 | A kind of 12Cr1MoVG path Thick Wall Tube Welding method |
| CN109483024A (en) * | 2018-12-03 | 2019-03-19 | 江西洪都航空工业集团有限责任公司 | A kind of large thick-wall structural member mixed gas protected consumable-electrode automatic welding method |
| WO2019076208A1 (en) * | 2017-10-16 | 2019-04-25 | 中国电建集团山东电力建设第一工程有限公司 | Welding and heat treatment process for medium-to-large diameter pipeline of novel cb2 heat-resistant steel |
| CN112372107A (en) * | 2020-11-06 | 2021-02-19 | 攀钢集团工程技术有限公司 | Application method of consumable electrode pulse TG5 inverter welding machine in pipeline welding |
| CN112475561A (en) * | 2019-09-11 | 2021-03-12 | 威海热电集团有限公司 | Process for automatically welding main steam pipeline |
| CN113634853A (en) * | 2021-08-27 | 2021-11-12 | 中化二建集团有限公司 | Method for welding composite steel pipeline made of 1-1/4Cr-1/2Mo +410S |
| CN116213887A (en) * | 2023-05-08 | 2023-06-06 | 中南大学 | Argon arc welding repair method for 1.2738 steel plastic mold |
Citations (3)
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| CN1814387A (en) * | 2006-02-24 | 2006-08-09 | 中国有色金属工业第六冶金建设公司金属结构厂 | 12Cr1MoV alloy steel pipe welding method |
| CN101618475A (en) * | 2008-07-03 | 2010-01-06 | 中冶成工建设有限公司 | Carbon dioxide automatic full position welding method for small bore pipes |
| CN201455513U (en) * | 2009-07-06 | 2010-05-12 | 四川电子焊接设备公司 | Automatic carbon dioxide gas shielded welder |
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| CN1814387A (en) * | 2006-02-24 | 2006-08-09 | 中国有色金属工业第六冶金建设公司金属结构厂 | 12Cr1MoV alloy steel pipe welding method |
| CN101618475A (en) * | 2008-07-03 | 2010-01-06 | 中冶成工建设有限公司 | Carbon dioxide automatic full position welding method for small bore pipes |
| CN201455513U (en) * | 2009-07-06 | 2010-05-12 | 四川电子焊接设备公司 | Automatic carbon dioxide gas shielded welder |
Cited By (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102463406A (en) * | 2010-11-10 | 2012-05-23 | 沈阳鼓风机集团股份有限公司 | Welding process of heat-resistant steel cylindrical housing |
| CN102019481B (en) * | 2010-11-30 | 2012-10-03 | 武昌船舶重工有限责任公司 | Plain butt welding process for high-strength hull structural steel |
| CN102019481A (en) * | 2010-11-30 | 2011-04-20 | 武昌船舶重工有限责任公司 | Plain butt welding process for high-strength hull structural steel |
| CN102114577A (en) * | 2010-12-17 | 2011-07-06 | 陕西国德电气制造有限公司 | One-time welding method |
| CN102114577B (en) * | 2010-12-17 | 2016-02-10 | 陕西国德电气制造有限公司 | A kind of disposable welding method |
| CN102756218A (en) * | 2011-04-27 | 2012-10-31 | 五冶集团上海有限公司 | Benzene hydrogenation engineering heat resistant steel pipeline welding method |
| CN102756218B (en) * | 2011-04-27 | 2016-01-27 | 五冶集团上海有限公司 | Benzene hydrogenation engineering heat resisting steel method for welding pipeline |
| CN102489888B (en) * | 2011-11-29 | 2013-09-04 | 武汉船用机械有限责任公司 | Welding method for high-strength steel truss-type cantilever crane |
| CN102489888A (en) * | 2011-11-29 | 2012-06-13 | 武汉船用机械有限责任公司 | Welding method for high-strength steel truss-type cantilever crane |
| CN102848048B (en) * | 2012-09-07 | 2015-11-25 | 龙口中集来福士海洋工程有限公司 | Pipeline welding method |
| CN102848048A (en) * | 2012-09-07 | 2013-01-02 | 龙口中集来福士海洋工程有限公司 | Pipeline welding method |
| CN102873436A (en) * | 2012-10-30 | 2013-01-16 | 西安泵阀总厂有限公司 | Method for welding insulated joint bottoming |
| CN102962557A (en) * | 2012-11-06 | 2013-03-13 | 哈尔滨汽轮机厂有限责任公司 | Method for welding balancing air leakage pipe of medium-high pressure outer cylinder in turbine |
| CN103447670B (en) * | 2013-09-03 | 2015-09-30 | 上海振华重工(集团)股份有限公司 | High-strength steel Q690E double-wire MAG welding connects process |
| CN104259632A (en) * | 2014-07-10 | 2015-01-07 | 扬帆集团股份有限公司 | Tail fin welding process of 10000-ton level bulk cargo ship |
| CN105364276A (en) * | 2015-10-31 | 2016-03-02 | 江苏振光电力设备制造有限公司 | Welding machining technology of high-strength-steel steel pipe tower |
| CN106180981A (en) * | 2016-08-05 | 2016-12-07 | 中铁十八局集团第四工程有限公司 | The CO of super large caliber steel pipe2gas protection welding process |
| CN107378207A (en) * | 2017-07-26 | 2017-11-24 | 南通振华重型装备制造有限公司 | A kind of 4130 high-voltage tube high-efficiency welding methods |
| WO2019076208A1 (en) * | 2017-10-16 | 2019-04-25 | 中国电建集团山东电力建设第一工程有限公司 | Welding and heat treatment process for medium-to-large diameter pipeline of novel cb2 heat-resistant steel |
| CN108817610A (en) * | 2018-09-07 | 2018-11-16 | 中国能源建设集团安徽电力建设第工程有限公司 | A kind of 12Cr1MoVG path Thick Wall Tube Welding method |
| CN109483024A (en) * | 2018-12-03 | 2019-03-19 | 江西洪都航空工业集团有限责任公司 | A kind of large thick-wall structural member mixed gas protected consumable-electrode automatic welding method |
| CN112475561A (en) * | 2019-09-11 | 2021-03-12 | 威海热电集团有限公司 | Process for automatically welding main steam pipeline |
| CN112372107A (en) * | 2020-11-06 | 2021-02-19 | 攀钢集团工程技术有限公司 | Application method of consumable electrode pulse TG5 inverter welding machine in pipeline welding |
| CN113634853A (en) * | 2021-08-27 | 2021-11-12 | 中化二建集团有限公司 | Method for welding composite steel pipeline made of 1-1/4Cr-1/2Mo +410S |
| CN116213887A (en) * | 2023-05-08 | 2023-06-06 | 中南大学 | Argon arc welding repair method for 1.2738 steel plastic mold |
| CN116213887B (en) * | 2023-05-08 | 2023-08-11 | 中南大学 | Argon arc welding repair method for 1.2738 steel plastic mold |
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Application publication date: 20101006 |