CN105537735A - Repair welding method for magnesium alloy casting oil way - Google Patents
Repair welding method for magnesium alloy casting oil way Download PDFInfo
- Publication number
- CN105537735A CN105537735A CN201610130645.6A CN201610130645A CN105537735A CN 105537735 A CN105537735 A CN 105537735A CN 201610130645 A CN201610130645 A CN 201610130645A CN 105537735 A CN105537735 A CN 105537735A
- Authority
- CN
- China
- Prior art keywords
- oil circuit
- graphite
- welding
- repair
- foundry goods
- Prior art date
- 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
-
- 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
-
- 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
-
- 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
- B23K9/32—Accessories
Abstract
The invention relates to a repair welding method for a magnesium alloy casting oil way. A graphite material is used as a repair welding base plate for carrying out repair welding on defects of a casting, so that the purpose of repair is achieved. The characteristics of softness, easy removal, high temperature resistance and thermal shock resistance of graphite are utilized, in the using process, the repair welding base plate can bear acute changes of temperature so that damage and cracks can be prevented, and has various properties needed by an argon arc welding base plate, it is possible to repair the defects of the magnesium alloy casting oil way part, and the purpose of saving the casting is achieved.
Description
Technical field
The present invention relates to a kind of repair method, especially a kind of repair method of Mg alloy castings oil circuit.
Background technology
When defect appears in Mg alloy castings in process of production, sometimes need defect to remove, then adopt the mode of GTAW to repair defect, reach the object saving foundry goods.In the process of repair welding, first fault location to be processed into the shape being applicable to carrying out repair welding, as the groove of circular arc, be commonly called as groove.For preventing weldering place from subsiding, need to place backing plate below groove, backing plate is generally copper coin or refractory brick, is taken off by backing plate after having welded.When defect appears at tubulose oil circuit part, because oil circuit is closed cavity, backing plate during repair welding should be placed in oil circuit, postwelding backing plate will be sealed up for safekeeping in oil circuit chamber, for aluminium alloy castings, copper coin can be used as backing plate, adopt the method for corrosion to be removed by backing plate, and due to the active chemical property of magnesium alloy, method not by corrosion removes backing plate, faces the difficult problem that liner is difficult to take out, thus causes carrying out repair welding, namely mean scrapping of foundry goods, cause a large amount of losses due to spoiled work.
Summary of the invention
The object of this invention is to provide a kind of Mg alloy castings oil circuit repair method, to repair magnesium alloy tubulose oil passage cast part, make it meet the standard of drawing or relevant art specification, avoid loss from spoilage.
Concrete technical scheme of the present invention is: described Mg alloy castings oil circuit repair method comprises the following steps:
(1) processing graphite, make its size with fault location oil circuit and profile consistent;
(2) oil circuit fault location is cleared up, until defect is removed completely clean;
(3) at fault location finished edge, the angle at groove place is 45 ° ~ 50 °;
(4) graphite after processing is put into place to be welded, graphite and oil circuit wall are fitted;
(5) adjust the position of foundry goods, make weldering place in level, be convenient to repair welding;
(6) clear up welding wire, remove surface anti-oxidation coat, make welding wire surface light;
(7) welding parameter is set, welding current 180 ~ 260A, argon flow amount 15 ~ 20L/Min;
(8) postwelding cleaning, cleaning oil circuit outer surface, makes it meet foundry goods appearance and size;
(9) pneumatic flexible milling cutter cleaning oil circuit inner chamber is used, broken graphite, then clean with wind;
(10) quality testing, carries out X-ray examination and fluoroscopy to welding zone.
The material of described welding wire is identical with the material of foundry goods.
After (2) described step, judge whether defect is removed completely by X-ray examination.
The present invention uses graphite material as repair welding backing plate, and because graphite is soft, be easy to remove, postwelding available mechanical method is removed.Graphite is high temperature resistant, and has thermal shock resistance, and be able to take the acute variation of temperature and unlikely destruction during use, can not crack, the graphite thermal coefficient of expansion is little, and during temperature jump, the Volume Changes of graphite is little, possesses the properties needed for argon arc welding backing plate.By the present invention, make the defect of reparation Mg alloy castings oil circuit part become possibility, reach the object saving foundry goods.
Detailed description of the invention
Mg alloy castings oil circuit repair method comprises the following steps:
(1) processing graphite, make its size with fault location oil circuit and profile consistent;
(2) oil circuit fault location is cleared up, until defect is removed completely clean;
(3) at fault location finished edge, the angle at groove place is 45 ° ~ 50 °;
(4) graphite after processing is put into place to be welded, graphite and oil circuit wall are fitted;
(5) adjust the position of foundry goods, make weldering place in level, be convenient to repair welding;
(6) clear up welding wire, remove surface anti-oxidation coat, make welding wire surface light;
(7) welding parameter is set, welding current 180 ~ 260A, argon flow amount 15 ~ 20L/Min;
(8) postwelding cleaning, cleaning oil circuit outer surface, makes it meet foundry goods appearance and size;
(9) pneumatic flexible milling cutter cleaning oil circuit inner chamber is used, broken graphite, then clean with wind;
(10) quality testing, carries out X-ray examination and fluoroscopy to welding zone.
The material of described welding wire is identical with the material of foundry goods.
After (2) described step, judge whether defect is removed completely by X-ray examination.
Embodiment 1
Certain Helicopter Transmission System rear housing oil circuit, material trademark is ZM6, creates gas hole defect after casting, and the oil circuit diameter of fault location is Φ 12mm, and length is 100mm.Need to carry out repair welding to it, to reach the object of reparation.Its concrete implementation process is as follows:
(1) processing graphite, makes it consistent with the shape and size of fault location oil circuit, and namely graphite is diameter is Φ 12mm, and length is 100mm;
(2) oil circuit fault location is cleared up, until defect is removed completely clean;
(3) at fault location finished edge, the angle at groove place is 50 °;
(4) graphite after processing is put into place to be welded, graphite and oil circuit wall are fitted;
(5) adjust the position of foundry goods, make weldering place in level, be convenient to repair welding;
(6) clear up welding wire, the material of welding wire is identical with the material of foundry goods, removes surface anti-oxidation coat, makes welding wire surface light;
(7) welding parameter is set, welding current 220A, argon flow amount 20L/Min;
(8) postwelding cleaning, cleaning oil circuit outer surface, makes it meet foundry goods appearance and size;
(9) pneumatic flexible milling cutter cleaning oil circuit inner chamber is used, broken graphite, then clean with wind;
(10) quality testing, carries out X-ray examination and fluoroscopy to welding zone.
Through quality testing, weldering place meets acceptance condition, and repair welding is qualified.
Claims (2)
1. a Mg alloy castings oil circuit repair method, is characterized in that, described method comprises the following steps:
1) processing graphite, make its size with fault location oil circuit and profile consistent;
2) oil circuit fault location is cleared up, until defect is removed completely clean;
3) at fault location finished edge, the angle at groove place is 45 ° ~ 50 °;
4) graphite after processing is put into place to be welded, graphite and oil circuit wall are fitted;
5) adjust the position of foundry goods, make weldering place in level, be convenient to repair welding;
6) clear up welding wire, remove surface anti-oxidation coat, make welding wire surface light;
7) welding parameter is set, welding current 180 ~ 260A, argon flow amount 15 ~ 20L/Min;
8) postwelding cleaning, cleaning oil circuit outer surface, makes it meet foundry goods appearance and size;
9) pneumatic flexible milling cutter cleaning oil circuit inner chamber is used, broken graphite, then clean with wind;
10) quality testing, carries out X-ray examination and fluoroscopy to welding zone;
The material of described welding wire is identical with the material of foundry goods.
2., after (2) step described in, judge whether defect is removed completely by X-ray examination.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610130645.6A CN105537735A (en) | 2016-03-08 | 2016-03-08 | Repair welding method for magnesium alloy casting oil way |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610130645.6A CN105537735A (en) | 2016-03-08 | 2016-03-08 | Repair welding method for magnesium alloy casting oil way |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105537735A true CN105537735A (en) | 2016-05-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610130645.6A Pending CN105537735A (en) | 2016-03-08 | 2016-03-08 | Repair welding method for magnesium alloy casting oil way |
Country Status (1)
| Country | Link |
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| CN (1) | CN105537735A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107199389A (en) * | 2017-06-12 | 2017-09-26 | 中国航发哈尔滨东安发动机有限公司 | One kind realizes Mg alloy castings oil circuit repair method by Water-soluble ceramic |
| CN107363382A (en) * | 2017-06-12 | 2017-11-21 | 中国航发哈尔滨东安发动机有限公司 | One kind realizes Mg alloy castings repair welding pad approach using ceramic fibre |
| CN112705906A (en) * | 2021-01-23 | 2021-04-27 | 中车洛阳机车有限公司 | Welding repair method for outer cylinder of preheating boiler |
| CN113681125A (en) * | 2021-08-31 | 2021-11-23 | 北京星航机电装备有限公司 | Defect repairing method for special-shaped thin-wall oil storage structural part |
| CN113909798A (en) * | 2021-11-10 | 2022-01-11 | 航发优材(镇江)钛合金精密成型有限公司 | Method for repair welding and deformation prevention of casting titanium alloy thin-wall culvert runner size |
| CN114227137A (en) * | 2021-11-24 | 2022-03-25 | 上海航天精密机械研究所 | Defect repairing method for Mg-Gd-Y-Zr heat-resistant magnesium alloy casting |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5495952A (en) * | 1978-01-13 | 1979-07-28 | Nippon Steel Corp | Repairing method for vertical plane of large cast steel structure by building up |
| CN103028813A (en) * | 2012-12-19 | 2013-04-10 | 马鞍山马钢设备安装工程有限公司 | Welding repair method for local damage of G42CrMo4N cold rolling shaft sleeve |
| CN103056586A (en) * | 2012-12-14 | 2013-04-24 | 贵州黎阳航空动力有限公司 | Repairing process for surface defect of magnesium alloy casting |
| CN104439680A (en) * | 2014-11-18 | 2015-03-25 | 贵州安吉航空精密铸造有限责任公司 | Casting repair welding method |
| CN105234526A (en) * | 2015-11-13 | 2016-01-13 | 北京动力机械研究所 | Welding process of titanium alloy graphite backing |
-
2016
- 2016-03-08 CN CN201610130645.6A patent/CN105537735A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5495952A (en) * | 1978-01-13 | 1979-07-28 | Nippon Steel Corp | Repairing method for vertical plane of large cast steel structure by building up |
| CN103056586A (en) * | 2012-12-14 | 2013-04-24 | 贵州黎阳航空动力有限公司 | Repairing process for surface defect of magnesium alloy casting |
| CN103028813A (en) * | 2012-12-19 | 2013-04-10 | 马鞍山马钢设备安装工程有限公司 | Welding repair method for local damage of G42CrMo4N cold rolling shaft sleeve |
| CN104439680A (en) * | 2014-11-18 | 2015-03-25 | 贵州安吉航空精密铸造有限责任公司 | Casting repair welding method |
| CN105234526A (en) * | 2015-11-13 | 2016-01-13 | 北京动力机械研究所 | Welding process of titanium alloy graphite backing |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107199389A (en) * | 2017-06-12 | 2017-09-26 | 中国航发哈尔滨东安发动机有限公司 | One kind realizes Mg alloy castings oil circuit repair method by Water-soluble ceramic |
| CN107363382A (en) * | 2017-06-12 | 2017-11-21 | 中国航发哈尔滨东安发动机有限公司 | One kind realizes Mg alloy castings repair welding pad approach using ceramic fibre |
| CN112705906A (en) * | 2021-01-23 | 2021-04-27 | 中车洛阳机车有限公司 | Welding repair method for outer cylinder of preheating boiler |
| CN113681125A (en) * | 2021-08-31 | 2021-11-23 | 北京星航机电装备有限公司 | Defect repairing method for special-shaped thin-wall oil storage structural part |
| CN113909798A (en) * | 2021-11-10 | 2022-01-11 | 航发优材(镇江)钛合金精密成型有限公司 | Method for repair welding and deformation prevention of casting titanium alloy thin-wall culvert runner size |
| CN114227137A (en) * | 2021-11-24 | 2022-03-25 | 上海航天精密机械研究所 | Defect repairing method for Mg-Gd-Y-Zr heat-resistant magnesium alloy casting |
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