CN1814387A - 12Cr1MoV alloy steel pipe welding method - Google Patents
12Cr1MoV alloy steel pipe welding method Download PDFInfo
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- CN1814387A CN1814387A CN 200610017462 CN200610017462A CN1814387A CN 1814387 A CN1814387 A CN 1814387A CN 200610017462 CN200610017462 CN 200610017462 CN 200610017462 A CN200610017462 A CN 200610017462A CN 1814387 A CN1814387 A CN 1814387A
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Abstract
The invention involves a method of welding 12Cr1MoV alloy steel pipes. Process the welding surfaces of the two pipes into a sloping groove, and clean the welding surfaces and its neighboring area, fix the two pipes which to be welded along using a clamp. Preheat and insulate the pipe area near the weld. First weld the pipes with welding rod H08CrMoVA, then weld several layers manually with stainless steel welding rod, and at last impose a heat treatment to the pipe. The invention uses refractory stainless steel welding rod A242 taking the place of R317 as the bonding material of the weld. And the steel welding rod improves the mechanical performances and toughness. The weld will not have cracks and will not penetrated in the conditions of high temperature, high pressure and high alkali, and greatly extends the service life of the welding line.
Description
Technical field
The present invention relates to the steel-pipe welding method, especially relate to the welding method of 12Cr1MoV alloy pipe.
Background technology
The 12Cr1MoV alloy pipe is a kind of material that alumina industry generally uses, and it is welded to connect all is by using the steel alloy welding material to weld with the method for melting welding usually. Conventional way is with the bottoming of H08CrMoVA welding wire, with R317 welding rod capping. Use the weld seam of this welding procedure, be under high temperature, high pressure and the highly basic operating mode at pipeline, be easy in the short time localized cracks of weld seam occur and penetrate.
Summary of the invention
The objective of the invention is effectively to overcome the 12Cr1MoV alloy pipe and cause the problem that weld seam cracks easily and penetrates under high temperature, high pressure and highly basic operating mode with the welding of normal welding technique, a kind of welding method of the 12Cr1MoV alloy pipe that weld seam can not crack and penetrate under high temperature, high pressure and highly basic operating mode is provided.
For achieving the above object, the present invention adopts following technical scheme: the welding method of 12Cr1MoV alloy pipe be the solder side of two steel pipes of mutually weldering be processed into groove type and solder side and near dirt on the steel pipe clean up, utilize anchor clamps that the steel pipe of two-phase weldering is fixed, near the butt welded seam steel pipe carries out preheating and is incubated, in order to overcome in the alkali lye chlorion to the corrosion of stainless steel weld seam, weld with H08CrMoVA welding wire argon arc welding bottoming, to avoid contacting of stainless steel weld seam and chlorion, use afterwards the some layers of heat-resistance stainless steel welding rod manual welding, postwelding is heat-treated.
Near the butt welded seam steel pipe is preheated to 250～350 ℃.
The angle α of two-phase Coiling Welded Pipe groove is 60 ± 3 °, and the gap of two steel-pipe welding end faces is 2.5～3.0mm.
The heat-resistance stainless steel welding rod adopts A242 or E317-16.
When welding with stainless steel electrode, should remove slag and the splash of layer interlayer, the interlayer welding temperature is not less than 250 ℃.
The temperature of post weld heat treatment is 715～745 ℃, and temperature retention time was more than or equal to 0.5 hour.
After adopting such scheme, because the inventive method has had the different of essence from national welding conditions and traditional handicraft, it has overcome the crackle of national welding conditions and the easy generation under special operation condition of traditional handicraft weld seam and has penetrated, and has obtained the welding point of high-quality; Use heat-resistance stainless steel welding rod such as A242 to replace the R317 wlding and be the main connecting material of weld seam, mechanical property and the toughness of weld seam have been improved, can greatly prolong the service time of weld seam under high temperature, high pressure and highly basic working condition, greatly improve economic benefit. Use the present invention to be applicable to the welding of 12Cr1MoV alloy pipe under high temperature, high pressure and highly basic working condition in order to overcome alkali lye.
Description of drawings
Fig. 1 is that the present invention is to welded pipe end machining sketch chart;
Fig. 2 is appearance of weld schematic diagram of the present invention.
The specific embodiment
Below the welding step of 12Cr1MoV alloy pipe of the present invention is elaborated:
1, the steel pipe 1 of mutually weldering and 2 solder side are machined into groove type, as shown in Figure 1, its oblique angle α is 60 ± 3 °, and gap c is 2.5～3.0mm, and clean solder side and near dirts such as greasy dirt, iron rust on the steel pipe.
2, utilize anchor clamps that the steel pipe of two-phase weldering is fixed.
3, heater such as crawler belt heater are set near weld seam, near the steel pipe the butt welded seam is heated to 250～350 ℃.
4, insulation, and with H08CrMoVA welding wire argon arc welding bottoming welding, shown in a among Fig. 2.
5, with the some layers of A242 stainless steel electrode manual welding, shown in b among Fig. 2, should remove slag and the splash of layer interlayer, the interlayer welding temperature is not less than 250 ℃.
6, heating is heat-treated, and heat treated temperature is 715～745 ℃, and temperature retention time was more than or equal to 0.5 hour. Heating-up temperature and temperature retention time are determined according to the thickness of pipe.
7, butt welded seam carries out nondestructiving inspecting test, and Non-Destructive Testing can be adopted ray, ultrasonic or penetration mode; Simultaneously the mechanical properties such as the stretching of welding rear steel pipe, bending, impact are tested.
Table 1 is welding conditions, technical measures and the requirement of φ 159 * 10 specification 12Cr1MoV alloy pipes of the present invention, to further specify the present invention. According to actual conditions, but welding parameters such as electric current, voltage, speed of welding and gas flow etc. are adjusted.
Table 1
| Sequence number | Welding conditions, technical measures and requirement | |||||
| 1 | Steel material | 12Cr1MoV | ||||
| 2 | Steel specs | φ159×10 | ||||
| 3 | The welding level | 1 | 2 | 3 | 4 | 5 |
| 4 | Welding method | GTAW | SMAW | SMAW | SMAW | SMAW |
| 5 | The wlding trade mark | H08CrMoVA | A242 | A242 | A242 | A242 |
| 6 | The wlding diameter | φ2.5 | φ3.2 | φ3.2 | φ3.2 | φ3.2 |
| 7 | Polarity | Just connect | Reversal connection | Reversal connection | Reversal connection | Reversal connection |
| 8 | Welding current (A) | 100～120 | 100～130 | 100～130 | 100～130 | 100～130 |
| 9 | Arc voltage (V) | 15～18 | 22～28 | 22～28 | 22～28 | 22～28 |
| 10 | Speed of welding (cm/min) | 6～12 | 4～9 | 4～9 | 4～9 | 4～9 |
| 11 | Gas flow (L/min) | 9～12 | ||||
| 12 | Assembling | 1. remove oil, rust in groove and near the 20mm scope, expose metallic luster; 2. the tack weld wlding is identical with formal weld seam wlding. | ||||
| 13 | Weld preheating | 250 ℃～350 ℃ of preheat temperatures. | ||||
| 14 | The interlayer requirement | 1. remove molten slag and splash; 2. interlayer temperature is not less than 250 ℃. | ||||
| 15 | Eliminate the welding stress processing method | 1. postwelding is heat-treated immediately; 2. heat treatment temperature is 715～745 ℃; 3. temperature retention time 〉=0.5h. | ||||
| 16 | Examination requirements | 1. Non-Destructive Testing (ray, ultrasonic, infiltration); 2. mechanics check (stretching, crooked, impact). | ||||
Claims (6)
1, the welding method of 12Cr1MoV alloy pipe, it is characterized in that, the solder side of two steel pipes of mutually weldering be processed into groove type and solder side and near dirt on the steel pipe clean up, utilize anchor clamps that the steel pipe of two-phase weldering is fixed, near the butt welded seam steel pipe carries out preheating and is incubated, with H08CrMoVA welding wire argon arc welding bottoming welding, use afterwards the some layers of heat-resistance stainless steel welding rod manual welding, postwelding is heat-treated.
2, welding method as claimed in claim 1 is characterized in that, near the steel pipe the butt welded seam is preheated to 250～350 ℃.
3, welding method as claimed in claim 1 or 2 is characterized in that, the angle α of two-phase Coiling Welded Pipe groove is 60 ± 3 °, and the gap of two steel-pipe welding end faces is 2.5～3.0mm.
4, welding method as claimed in claim 1 or 2 is characterized in that, the heat-resistance stainless steel welding rod adopts A242 or E317-16.
5, welding method as claimed in claim 4 is characterized in that, when welding with stainless steel electrode, should remove slag and the splash of layer interlayer, and the interlayer welding temperature is not less than 250 ℃.
6, welding method as claimed in claim 5 is characterized in that, the temperature of post weld heat treatment is 715～745 ℃, and temperature retention time was more than or equal to 0.5 hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610017462 CN1814387A (en) | 2006-02-24 | 2006-02-24 | 12Cr1MoV alloy steel pipe welding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610017462 CN1814387A (en) | 2006-02-24 | 2006-02-24 | 12Cr1MoV alloy steel pipe welding method |
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| CN1814387A true CN1814387A (en) | 2006-08-09 |
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| CN 200610017462 Pending CN1814387A (en) | 2006-02-24 | 2006-02-24 | 12Cr1MoV alloy steel pipe welding method |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101850460A (en) * | 2010-05-21 | 2010-10-06 | 中国石化集团第五建设公司 | Welding process of 12Cr1MoV high-pressure pipeline CO2 semiautomatic or automatic gas shielded welding |
| CN101913014A (en) * | 2010-08-24 | 2010-12-15 | 中冶集团华冶资源开发有限责任公司 | Welding method of stainless steel composite board |
| CN101695783B (en) * | 2009-11-04 | 2011-07-27 | 中国华西企业有限公司 | Automatic control welding process for scaffold short steel pipes for construction |
| CN102230066A (en) * | 2011-06-22 | 2011-11-02 | 中国石化集团第十建设公司 | Local heat treatment process for welding seam of 12CrlMoV pipe |
| 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 |
| CN102909479A (en) * | 2012-09-29 | 2013-02-06 | 郑州市嵩阳煤机制造有限公司 | Welding method for square long girders |
| CN102922228A (en) * | 2012-10-15 | 2013-02-13 | 南通市电站阀门有限公司 | Valve manufacturing process for improving impact toughness of F92 butt welding heat affected area |
| 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 |
| CN103143850A (en) * | 2013-03-08 | 2013-06-12 | 国核工程有限公司 | Process for preventing cold cracking of ASTM (American society for testing material) standard high-strength, low-alloy and atmospheric-corrosion-resistance structural steel |
| CN104070263A (en) * | 2013-03-29 | 2014-10-01 | 中国石油天然气集团公司 | Preparation method of specimen for full-scale physical test of V150 steel oil well pipes |
| CN104801875A (en) * | 2014-10-22 | 2015-07-29 | 烟台中集来福士海洋工程有限公司 | Stainless steel tube active tungsten argon arc weld groove and processing method |
| CN104874937A (en) * | 2015-06-15 | 2015-09-02 | 唐山师范学院 | Welding technology for bainite heat-resistant steel 12Cr2MoWVTiB |
| CN106735760A (en) * | 2017-01-18 | 2017-05-31 | 安徽马钢工程技术集团有限公司 | A kind of welding procedure of 15CrMo heat-resisting alloy steels |
| CN107584229A (en) * | 2017-10-27 | 2018-01-16 | 湖州正德轻工机械有限公司 | A kind of alloy pipe welding method |
| 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 |
| CN110587074A (en) * | 2019-09-29 | 2019-12-20 | 无锡市锡西化机配件有限公司 | Surfacing welding process for copper pipe and stainless steel pipe |
| CN111570977A (en) * | 2020-05-26 | 2020-08-25 | 中国水利水电第九工程局有限公司 | Butt welding connection method for building supporting circular tube steel column |
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2006
- 2006-02-24 CN CN 200610017462 patent/CN1814387A/en active Pending
Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101695783B (en) * | 2009-11-04 | 2011-07-27 | 中国华西企业有限公司 | Automatic control welding process for scaffold short steel pipes for construction |
| CN101850460A (en) * | 2010-05-21 | 2010-10-06 | 中国石化集团第五建设公司 | Welding process of 12Cr1MoV high-pressure pipeline CO2 semiautomatic or automatic gas shielded welding |
| CN101913014B (en) * | 2010-08-24 | 2013-04-03 | 中国华冶科工集团有限公司 | Welding method of stainless steel composite board |
| CN101913014A (en) * | 2010-08-24 | 2010-12-15 | 中冶集团华冶资源开发有限责任公司 | Welding method of stainless steel composite board |
| 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 |
| 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 |
| CN102230066A (en) * | 2011-06-22 | 2011-11-02 | 中国石化集团第十建设公司 | Local heat treatment process for welding seam of 12CrlMoV pipe |
| 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 |
| 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 |
| CN102909479A (en) * | 2012-09-29 | 2013-02-06 | 郑州市嵩阳煤机制造有限公司 | Welding method for square long girders |
| CN102922228A (en) * | 2012-10-15 | 2013-02-13 | 南通市电站阀门有限公司 | Valve manufacturing process for improving impact toughness of F92 butt welding heat affected area |
| CN102922228B (en) * | 2012-10-15 | 2015-01-14 | 南通市电站阀门有限公司 | Valve manufacturing process for improving impact toughness of F92 butt welding heat affected area |
| 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 |
| CN103143850A (en) * | 2013-03-08 | 2013-06-12 | 国核工程有限公司 | Process for preventing cold cracking of ASTM (American society for testing material) standard high-strength, low-alloy and atmospheric-corrosion-resistance structural steel |
| CN104070263A (en) * | 2013-03-29 | 2014-10-01 | 中国石油天然气集团公司 | Preparation method of specimen for full-scale physical test of V150 steel oil well pipes |
| CN104070263B (en) * | 2013-03-29 | 2016-07-13 | 中国石油天然气集团公司 | V150 steel grade oil well casing Full scale testing preparation method of sample |
| CN104801875A (en) * | 2014-10-22 | 2015-07-29 | 烟台中集来福士海洋工程有限公司 | Stainless steel tube active tungsten argon arc weld groove and processing method |
| CN104874937A (en) * | 2015-06-15 | 2015-09-02 | 唐山师范学院 | Welding technology for bainite heat-resistant steel 12Cr2MoWVTiB |
| CN106735760A (en) * | 2017-01-18 | 2017-05-31 | 安徽马钢工程技术集团有限公司 | A kind of welding procedure of 15CrMo heat-resisting alloy steels |
| CN107584229A (en) * | 2017-10-27 | 2018-01-16 | 湖州正德轻工机械有限公司 | A kind of alloy pipe welding method |
| 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 |
| CN110587074A (en) * | 2019-09-29 | 2019-12-20 | 无锡市锡西化机配件有限公司 | Surfacing welding process for copper pipe and stainless steel pipe |
| CN111570977A (en) * | 2020-05-26 | 2020-08-25 | 中国水利水电第九工程局有限公司 | Butt welding connection method for building supporting circular tube steel column |
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