CN114850621A - Method for welding oil stain welding part - Google Patents
Method for welding oil stain welding part Download PDFInfo
- Publication number
- CN114850621A CN114850621A CN202210660839.2A CN202210660839A CN114850621A CN 114850621 A CN114850621 A CN 114850621A CN 202210660839 A CN202210660839 A CN 202210660839A CN 114850621 A CN114850621 A CN 114850621A
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- CN
- China
- Prior art keywords
- welding
- oil
- oil stain
- emulsifier
- heat affected
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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
-
- 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
- B23K9/235—Preliminary treatment
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
The invention discloses a welding method of an oil stain welding part, which comprises the steps of coating a cleaning emulsifier on a welding heat affected zone and a welding line area after removing oil on the welding part and cleaning the welding part, and wiping the welding heat affected zone and the welding line area by using gauze, so that a layer of emulsifier is covered on the welding heat affected zone and the welding line area, and the emulsifier consumes final oil stains in the welding heating process, so that oil does not exist before welding line metal enters an arc gas protection umbrella cover. The invention has simple operation, low cost, improved work efficiency and reliable quality.
Description
Technical Field
The invention relates to a method for welding an oil stain welding part.
Background
In the process of equipment maintenance, the local welding of an oil system or the welding of equipment with oil stain parts can be met,
the method is often not properly treated, welding seam air holes and metal intergranular cracks are caused, and particularly, oil medium equipment such as oil tanks and fuel resistance equipment is just welded, micro cracks and oil seepage appear in welding seam metal, or how long the welding seam metal is not cleaned, and oil stain and oil seepage appear on the welding seam and the periphery.
People often mistakenly think that the arc temperature of the high-temperature manual arc welding is 6000-8000 ℃, the average molten drop reaches 2000 ℃, the average molten pool temperature reaches 1750 ℃, oil stains can be burnt, actually, 'oil vapor' is not volatilized under the protection of an arc gas protection umbrella cover or inert gas, but is dissociated in a liquid molten pool, and the oil vapor forms 'crisps' in weld metal (similar to the crisps in the oil cakes) and lamellar microcracks layer by layer under the cooling of the weld metal.
Such problems arise in many welders' work and are not dealt with by analysis, understanding and resolution. Once the weld metal contains oil layer cracks, the oil layer cracks cannot be repaired through repair welding and overlaying welding, and the defects only expand.
Along with the vibration and the time extension of equipment, the metal microcracks of the welding seams extend, so that the cracks of the welding seams and the affected areas are enlarged, the welding seams fail, a large amount of oil system media are leaked, and if the sparks of an operating excitation system, the rotating part of a high-temperature shafting and hydrogen system equipment exist around, serious combustion fire or even explosion accidents can occur.
Before an oil system and oil pollution equipment are welded, two treatment modes are generally adopted, and the physical cleaning is as follows: high-temperature steam is blown and polished, and then the mixture is burnt by oxyacetylene flame. Chemical removal: cleaning with alkaline acid, and wiping with acetone.
The cleaning work consumes time and labor, the welding part of the oil-related equipment has various complex shapes and positions, after cleaning, the maintenance and welding are delayed, the spreading of the oil surface is enlarged, or the oil glove is polluted by the oil, and the like, and the concave part of the residual oil stain is difficult to clean, so that the welding part still has oil stain.
Disclosure of Invention
The invention aims to provide a method for welding an oil stain welding part, which is simple to operate and reliable in quality.
The technical solution of the invention is as follows:
a method for welding greasy dirt welding parts is characterized in that: after the welding part is degreased and cleaned, a cleaning emulsifier is coated on the welding heat affected area and the welding seam area, and is wiped by gauze, so that a layer of emulsifier covers the welding heat affected area and the welding seam area, and the emulsifier consumes the final oil stain in the welding heating process, so that no oil exists before the welding seam metal enters the arc gas protection umbrella cover.
The oil stain welding part is an oil stain joint or an oil stain surface.
The invention has simple operation, low cost, improved work efficiency and reliable quality. The welding method has good effect and reliable welding quality in the welding work of the fire-resistant oil pipelines, the oil depot, the oil tank, the control oil pipelines and the oil-related mechanical structural parts of the power plant.
The value is as follows:
the oil system is often a high-pressure control system or a centralized control part, the reliability of welding quality plays a key role in long-period safe and stable operation of equipment, and a large number of welders in a power plant master the technology, so that the welding reliability of the oil equipment is greatly improved, the technical skill of the welders is improved, and the safety production level of the power plant is improved.
Drawings
The invention is further illustrated by the following figures and examples.
Fig. 1 is a schematic diagram of the working principle of the present invention.
Fig. 2 is a schematic view of a prior art welding situation.
In fig. 1: 1. an electrode; 2. an inert gas; 3. an electric arc; 4. oil gas; 5. oil stain; 6. a base material.
In fig. 2: 7. welding a metal section; 8. thermal cracking; 9. the section of the base material.
Detailed Description
A welding method for oil stain welded position is characterized by that after the welded position is deoiled and cleaned, the welding heat affected zone and welding seam region are coated with cleaning emulsifier (for example, it adopts commercially available "Wei-strong" oil-fume cleaning agent and soapy water), and then wiped by gauze so as to cover a layer of emulsifier in the welding heat affected zone and welding seam region, and in the course of welding heating, the lipophilic oil in the emulsifier can be used to consume final oil stain, and before the welding seam metal is fed into arc gas protection umbrella cover, it has no oil vapour and has no "crisp welding seam" hot crack.
The oil stain welding part is an oil stain joint or an oil stain surface and the like.
Claims (2)
1. A method for welding greasy dirt welding parts is characterized in that: after the welding part is degreased and cleaned, a cleaning emulsifier is coated on the welding heat affected area and the welding seam area, and is wiped by gauze, so that a layer of emulsifier covers the welding heat affected area and the welding seam area, and the emulsifier consumes the final oil stain in the welding heating process, so that no oil exists before the welding seam metal enters the arc gas protection umbrella cover.
2. The method for welding an oil stain welding part according to claim 1, which is characterized in that: the oil stain welding part is an oil stain joint or an oil stain surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210660839.2A CN114850621A (en) | 2022-06-13 | 2022-06-13 | Method for welding oil stain welding part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210660839.2A CN114850621A (en) | 2022-06-13 | 2022-06-13 | Method for welding oil stain welding part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114850621A true CN114850621A (en) | 2022-08-05 |
Family
ID=82624744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210660839.2A Pending CN114850621A (en) | 2022-06-13 | 2022-06-13 | Method for welding oil stain welding part |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114850621A (en) |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0015336A1 (en) * | 1979-02-23 | 1980-09-17 | Reef Chemical Corporation (Proprietary)Limited | Method of cleaning metals |
| DE10001488A1 (en) * | 2000-01-15 | 2001-07-26 | Daimler Chrysler Ag | Oil-coated workpiece cleaning method for welding or adhesive jointing station uses blast of hot air directed onto area to be welded or adhesive jointed |
| US20030019847A1 (en) * | 2000-01-14 | 2003-01-30 | Schmitt Klaus Gisbert | Method and device for multiple stage arc-welding |
| CN101104234A (en) * | 2007-08-10 | 2008-01-16 | 四川东风电机厂有限公司 | Water wheel generating set cast steel part defect repair welding crackle processing method |
| CN103361191A (en) * | 2012-04-05 | 2013-10-23 | 陈巍 | Multipurpose oil fouling cleaning agent |
| CN104439632A (en) * | 2014-10-28 | 2015-03-25 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for repairing abrasion defect of thin-wall lubricating oil tank shell |
| CN105750712A (en) * | 2014-12-13 | 2016-07-13 | 重庆迎瑞升压铸有限公司 | Submerged-arc welding technique |
| CN106238881A (en) * | 2016-08-29 | 2016-12-21 | 张家港华日法兰有限公司 | A kind of welding procedure of sheet material |
| CN106270975A (en) * | 2016-08-29 | 2017-01-04 | 张家港华日法兰有限公司 | A kind of welding procedure of tubing |
| CN106479704A (en) * | 2016-08-30 | 2017-03-08 | 句容宁武高新技术发展有限公司 | Greasy dirt emulsifying agent and preparation method thereof |
| CN107570838A (en) * | 2017-10-27 | 2018-01-12 | 北京奥林匹亚锅炉有限公司 | A kind of boiler corrugated inner liner welding procedure |
| CN111037045A (en) * | 2019-12-27 | 2020-04-21 | 上海江南船舶管业有限公司 | Welding process for casing joint of pipeline |
| CN113210869A (en) * | 2021-04-25 | 2021-08-06 | 江苏通宇钢管集团有限公司 | Efficient titanium alloy laser-electric arc composite heat source pipeline welding process |
| CN114247965A (en) * | 2020-09-21 | 2022-03-29 | 江苏利柏特股份有限公司 | Welding and heat treatment process method for Hastelloy composite material in modular production |
-
2022
- 2022-06-13 CN CN202210660839.2A patent/CN114850621A/en active Pending
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0015336A1 (en) * | 1979-02-23 | 1980-09-17 | Reef Chemical Corporation (Proprietary)Limited | Method of cleaning metals |
| US20030019847A1 (en) * | 2000-01-14 | 2003-01-30 | Schmitt Klaus Gisbert | Method and device for multiple stage arc-welding |
| DE10001488A1 (en) * | 2000-01-15 | 2001-07-26 | Daimler Chrysler Ag | Oil-coated workpiece cleaning method for welding or adhesive jointing station uses blast of hot air directed onto area to be welded or adhesive jointed |
| CN101104234A (en) * | 2007-08-10 | 2008-01-16 | 四川东风电机厂有限公司 | Water wheel generating set cast steel part defect repair welding crackle processing method |
| CN103361191A (en) * | 2012-04-05 | 2013-10-23 | 陈巍 | Multipurpose oil fouling cleaning agent |
| CN104439632A (en) * | 2014-10-28 | 2015-03-25 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for repairing abrasion defect of thin-wall lubricating oil tank shell |
| CN105750712A (en) * | 2014-12-13 | 2016-07-13 | 重庆迎瑞升压铸有限公司 | Submerged-arc welding technique |
| CN106238881A (en) * | 2016-08-29 | 2016-12-21 | 张家港华日法兰有限公司 | A kind of welding procedure of sheet material |
| CN106270975A (en) * | 2016-08-29 | 2017-01-04 | 张家港华日法兰有限公司 | A kind of welding procedure of tubing |
| CN106479704A (en) * | 2016-08-30 | 2017-03-08 | 句容宁武高新技术发展有限公司 | Greasy dirt emulsifying agent and preparation method thereof |
| CN107570838A (en) * | 2017-10-27 | 2018-01-12 | 北京奥林匹亚锅炉有限公司 | A kind of boiler corrugated inner liner welding procedure |
| CN111037045A (en) * | 2019-12-27 | 2020-04-21 | 上海江南船舶管业有限公司 | Welding process for casing joint of pipeline |
| CN114247965A (en) * | 2020-09-21 | 2022-03-29 | 江苏利柏特股份有限公司 | Welding and heat treatment process method for Hastelloy composite material in modular production |
| CN113210869A (en) * | 2021-04-25 | 2021-08-06 | 江苏通宇钢管集团有限公司 | Efficient titanium alloy laser-electric arc composite heat source pipeline welding process |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| TA01 | Transfer of patent application right |
Effective date of registration: 20221114 Address after: 226000 2507, Yufeng square, xinchengqiao street, Chongchuan District, Nantong City, Jiangsu Province Applicant after: Zhang Wei Applicant after: HUANENG TAICANG HARBOR SERVICE CO.,LTD. Address before: 226000 2507, Yufeng square, xinchengqiao street, Chongchuan District, Nantong City, Jiangsu Province Applicant before: Zhang Wei |
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| TA01 | Transfer of patent application right |