CN114589424A - Welding repair method for high-silicon Monel alloy casting - Google Patents
Welding repair method for high-silicon Monel alloy casting Download PDFInfo
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- CN114589424A CN114589424A CN202210175383.0A CN202210175383A CN114589424A CN 114589424 A CN114589424 A CN 114589424A CN 202210175383 A CN202210175383 A CN 202210175383A CN 114589424 A CN114589424 A CN 114589424A
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- Prior art keywords
- welding
- repair
- polishing
- defects
- weld
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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
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
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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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/003—Cooling means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
- B24B55/02—Equipment for cooling the grinding surfaces, e.g. devices for feeding coolant
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B9/00—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
- B24B9/02—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground
- B24B9/04—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of metal, e.g. skate blades
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Arc Welding In General (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention discloses a repair welding method for a high-silicon Monel alloy casting, which comprises the steps of polishing and removing all defects of the casting by using a polishing machine; placing the casting with the defects removed into a container filled with cold water, performing single-pass repair welding by using a phi 3.0 welding rod, stopping repair welding each pass, rapidly cooling to normal temperature, performing PT detection after craters are ground, and repeatedly performing single-pass repair welding, cooling, grinding and detection until a layer of repair welding on the whole defect surface is finished; after the bottom layer is welded, performing PT detection on a welding area; preparing upper layer weld repair after the bottom layer weld repair is completely qualified, and repeating single-pass weld repair, cooling, polishing and detection by using a phi 4.0 welding rod until the weld repair is complete and a region to be welded is repaired; after the welding repair is finished, detecting the whole casting by using PT; the repair welding rescue method improves the qualification rate of the high-silicon Monel alloy casting product, reduces the production cost, and solves the problem that a large amount of waste products cannot be saved through repair welding after the existing high-silicon Monel alloy casting product has defects.
Description
Technical Field
The invention relates to the technical field of precision casting, in particular to a repair welding method for a high-silicon Monel alloy casting.
Background
The high-silicon Monel alloy is composed of metal elements such as nickel, copper and silicon, and is used for steel making and pouring in the atmosphere, the metals react with oxygen in the air to generate a large amount of oxides, so that inclusions and serious discontinuous structures appear in a casting matrix, in addition, when a product with a boss with a poor wall thickness is produced by adopting conventional precise compact casting, cracks often appear at the corner position, and the defects generated at present can not be repaired by welding and can only be scrapped.
Disclosure of Invention
The invention mainly aims to provide a repair welding method for a high-silicon Monel alloy casting, which can effectively solve the problems in the background technology.
In order to achieve the purpose, the invention adopts the technical scheme that: a welding repair method for a high-silicon Monel alloy casting comprises the following steps:
1) and (3) removing defects: polishing and removing all defects of the casting by using a polishing machine;
2) preparation before repair welding: filling cold water in a container, putting the casting with the defects removed in the step 1) into the container, and enabling the position to be repaired to be positioned on the upper side of the water surface;
3) bottom layer welding repair: performing single-pass repair welding by using a phi 3.0 welding rod, stopping repair welding every time of welding, rapidly cooling to normal temperature, polishing a crater by using a polishing machine, detecting whether cracks exist around the crater through PT, polishing and removing the cracks, and repeatedly performing single-pass repair welding, cooling, polishing and detection on the cracks until one layer of repair welding on the whole defect surface is finished;
4) bottom layer welding repair detection: after the bottom layer welding is finished, PT detection is carried out on the welding area to detect whether cracks exist, and if cracks exist, welding is carried out again until the bottom layer welding is free of defects;
5) welding and repairing the upper layer: preparing upper layer weld repair after the bottom layer weld repair is completely qualified, and repeating the single-pass weld repair, cooling, polishing and detection in the step 3) by using a phi 4.0 welding rod until the weld repair is complete and a region to be welded;
6) detecting the whole defects: and 5) after the repair welding is finished, detecting whether the whole casting has cracks by using PT, polishing again to remove the defect repair welding when the cracks exist, and finishing the repair welding rescue of the casting defects when the cracks do not exist.
Preferably, cold water is adopted for cooling in the polishing process in the step 1).
Preferably, the temperature of the water in the container in the step 2) is not more than 40 ℃.
Preferably, compressed air is blown to the position of the weld repair in the step 3) for rapid cooling.
Preferably, the water temperature in the container is detected at irregular time in the welding repair process in the step 3), and the water temperature is overhigh and is replaced in time.
Compared with the prior art, the invention has the following beneficial effects: the repair welding rescue method improves the qualification rate of the high-silicon Monel alloy casting product, reduces the production cost, and solves the problem that a large amount of waste products cannot be saved through repair welding after the existing high-silicon Monel alloy casting product has defects.
Drawings
FIG. 1 is a schematic view of a container holding a casting according to the present invention;
FIG. 2 is a schematic view of weld repair of a casting according to the present invention.
In the figure: 1. a container; 2. cold water; 3. the position to be welded; 4. and (5) casting.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
A welding repair method for a high-silicon Monel alloy casting comprises the following steps:
1) and (3) removing defects: polishing by using a polishing machine to remove all defects of the casting, and cooling by using cold water in the polishing process;
2) preparation before repair welding: as shown in figure 1, a container is filled with cold water, the casting with the defects removed in the step 1) is placed into the container, and the position to be repaired is positioned on the upper side of the water surface, so that the water temperature in the container is ensured not to exceed 40 ℃;
3) bottom layer welding repair: as shown in fig. 2, a phi 3.0 welding rod is used for single-pass repair welding, repair welding is stopped every time welding is performed, compressed air is blown to a repair welding position to be rapidly cooled to normal temperature, a polishing machine is used for polishing a crater, then PT detection is performed on the surrounding of the crater to detect whether cracks exist, polishing and removing the cracks are performed, single-pass repair welding, cooling, polishing and detection are repeatedly performed on the cracks until a layer of repair welding of the whole defect surface is finished, the water temperature in a container is detected at variable time in the repair welding process, and the water temperature is changed in time when the water temperature is too high;
4) bottom layer welding repair detection: after the bottom layer welding is finished, PT detection is carried out on the welding area to detect whether cracks exist, and if cracks exist, welding is carried out again until the bottom layer welding is free of defects;
5) welding and repairing the upper layer: preparing upper layer weld repair after the bottom layer weld repair is completely qualified, and repeating the single-pass weld repair, cooling, polishing and detection in the step 3) by using a phi 4.0 welding rod until the weld repair is complete and a region to be welded;
6) detecting the whole defects: and 5) after the repair welding is finished, detecting whether the whole casting has cracks by using PT, polishing again to remove the defect repair welding when the cracks exist, and finishing the repair welding rescue of the casting defects when the cracks do not exist.
In the repair welding method, the most key step is the bottom layer repair welding in the step 3), single-pass repair welding is adopted, the repair welding is different from multi-pass welding, the area of the single-pass repair welding is controlled not to exceed the repair welding amount of one welding rod, the interlayer temperature is not more than 100 ℃, the temperature is physically and rapidly reduced to the room temperature, the upper layer repair welding is carried out after the repair welding is free of defects, the process of detecting once every single-pass repair welding is adopted, the repair welding quality is ensured, and the repair welding is qualified.
While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.
Claims (5)
1. A repair welding method for a high-silicon Monel alloy casting is characterized by comprising the following steps: the method comprises the following steps:
1) and (3) removing defects: polishing and removing all defects of the casting by using a polishing machine;
2) preparation before repair welding: filling cold water in a container, putting the casting with the defects removed in the step 1) into the container, and enabling the position to be repaired to be positioned on the upper side of the water surface;
3) bottom layer welding repair: performing single-pass welding repair by using a phi 3.0 welding rod, stopping welding repair every time of welding, rapidly cooling to normal temperature, polishing craters by using a polishing machine, detecting whether cracks exist around the craters through PT, polishing and removing the cracks, and repeatedly performing single-pass welding repair, cooling, polishing and detection on the cracks until one layer of welding repair on the whole defect surface is finished;
4) bottom layer welding repair detection: after the bottom layer welding is finished, PT detection is carried out on the welding area to detect whether cracks exist, and if cracks exist, welding is carried out again until the bottom layer welding is free of defects;
5) welding and repairing the upper layer: preparing upper layer weld repair after the bottom layer weld repair is completely qualified, and repeating the single-pass weld repair, cooling, polishing and detection in the step 3) by using a phi 4.0 welding rod until the weld repair is complete and an area to be welded is repaired;
6) detecting the whole defects: and 5) after the repair welding is finished, detecting whether the whole casting has cracks by using PT, polishing again to remove the defect repair welding when the cracks exist, and finishing the repair welding rescue of the casting defects when the cracks do not exist.
2. The method of weld repair of a high silicon Monel alloy casting according to claim 1, wherein: and cooling with cold water in the polishing process in the step 1).
3. The method of weld repair of a high silicon Monel alloy casting according to claim 1, wherein: the temperature of water in the container in the step 2) is not more than 40 ℃.
4. The method of weld repair of a high silicon Monel alloy casting according to claim 1, wherein: and 3) blowing compressed air to the position of the weld repair for rapid cooling in the step 3).
5. The method for weld-repairing a high-silicon Monel alloy casting according to claim 1, wherein: and 3) detecting the water temperature in the container at irregular time in the welding repair process, and timely replacing the overhigh water temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210175383.0A CN114589424A (en) | 2022-02-25 | 2022-02-25 | Welding repair method for high-silicon Monel alloy casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210175383.0A CN114589424A (en) | 2022-02-25 | 2022-02-25 | Welding repair method for high-silicon Monel alloy casting |
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| CN114589424A true CN114589424A (en) | 2022-06-07 |
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| CN202210175383.0A Pending CN114589424A (en) | 2022-02-25 | 2022-02-25 | Welding repair method for high-silicon Monel alloy casting |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6199576A (en) * | 1984-10-19 | 1986-05-17 | Mitsubishi Heavy Ind Ltd | Roll build-up welding method |
| CN101543926A (en) * | 2009-05-08 | 2009-09-30 | 常州海杰冶金机械制造有限公司 | Overlaying welding technology of ductile cast iron roller |
| CN102886590A (en) * | 2012-10-16 | 2013-01-23 | 重庆望江工业有限公司 | Method for repairing defects of parts by adopting manual arc welding and soaked repair welding |
| CN103406640A (en) * | 2013-09-06 | 2013-11-27 | 安徽应流集团霍山铸造有限公司 | Automatic deslagging welding method for manual electric-arc welding |
| CN107252972A (en) * | 2017-06-02 | 2017-10-17 | 中国科学院合肥物质科学研究院 | It is a kind of to reduce the laser filling wire welding technique of austenitic stainless steel weld joint solidification cracking |
| CN111702296A (en) * | 2020-06-08 | 2020-09-25 | 核工业西南物理研究院 | Multilayer multi-pass welding process for nonmagnetic stainless steel supporting seat of Tokamak device |
| CN113579417A (en) * | 2021-07-24 | 2021-11-02 | 共享铸钢有限公司 | Defect welding and heat treatment method for heat-resistant steel casting |
-
2022
- 2022-02-25 CN CN202210175383.0A patent/CN114589424A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6199576A (en) * | 1984-10-19 | 1986-05-17 | Mitsubishi Heavy Ind Ltd | Roll build-up welding method |
| CN101543926A (en) * | 2009-05-08 | 2009-09-30 | 常州海杰冶金机械制造有限公司 | Overlaying welding technology of ductile cast iron roller |
| CN102886590A (en) * | 2012-10-16 | 2013-01-23 | 重庆望江工业有限公司 | Method for repairing defects of parts by adopting manual arc welding and soaked repair welding |
| CN103406640A (en) * | 2013-09-06 | 2013-11-27 | 安徽应流集团霍山铸造有限公司 | Automatic deslagging welding method for manual electric-arc welding |
| CN107252972A (en) * | 2017-06-02 | 2017-10-17 | 中国科学院合肥物质科学研究院 | It is a kind of to reduce the laser filling wire welding technique of austenitic stainless steel weld joint solidification cracking |
| CN111702296A (en) * | 2020-06-08 | 2020-09-25 | 核工业西南物理研究院 | Multilayer multi-pass welding process for nonmagnetic stainless steel supporting seat of Tokamak device |
| CN113579417A (en) * | 2021-07-24 | 2021-11-02 | 共享铸钢有限公司 | Defect welding and heat treatment method for heat-resistant steel casting |
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