CN111390415A - Welding quality control method for steel-aluminum joint - Google Patents
Welding quality control method for steel-aluminum joint Download PDFInfo
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- CN111390415A CN111390415A CN202010213487.7A CN202010213487A CN111390415A CN 111390415 A CN111390415 A CN 111390415A CN 202010213487 A CN202010213487 A CN 202010213487A CN 111390415 A CN111390415 A CN 111390415A
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- Prior art keywords
- welding
- steel
- aluminum
- joint
- temperature
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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
- 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
-
- 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
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
- B23K2101/06—Tubes
-
- 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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
- B23K2103/05—Stainless steel
-
- 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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/08—Non-ferrous metals or alloys
- B23K2103/10—Aluminium or alloys thereof
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
The invention relates to a method for controlling the welding quality of a steel-aluminum joint. The method for controlling the welding quality of the steel-aluminum joint comprises the following steps: step 1: degreasing the steel-aluminum joint, and cleaning surface pollutants before welding; step 2: welding a stainless steel end and then welding an aluminum alloy end; and step 3: monitoring the welding temperature in real time, stopping welding if the temperature of the welding joint exceeds a threshold value, and continuing welding after the temperature of the joint is reduced to another threshold value; the method for controlling the welding quality of the steel-aluminum joint has high practicability and is convenient to develop on a construction site, and the quality of the welded steel-aluminum joint can be effectively improved and the method is convenient to popularize and use.
Description
Technical Field
The invention belongs to the technical field of pipe gallery structures, and particularly relates to a method for controlling welding quality of a steel-aluminum joint.
Background
With the continuous development of domestic air separation devices, the construction quality requirements of pipelines in cold boxes are more and more strict. The stainless steel pipeline and the aluminum and aluminum alloy pipeline are changed into the welding of the steel-aluminum joint at present from the forms of flange connection, dissimilar steel welding and the like. The welding performance difference between stainless steel and aluminum alloy results in great deformation, easy crack of welded seam and other faults, and thus poor quality of welded joint. However, the engineering project site is limited by conditions, and the stainless steel pipeline and the aluminum alloy pipeline cannot be connected by adopting a friction welding method. The welding property is different between the two, the difference between the melting point and the thermal expansion coefficient is very different, and when the temperature exceeds a specified value during welding, the defects of deformation, cracks and the like of the steel-aluminum joint are easily caused.
Disclosure of Invention
The invention aims to solve the problems and provide a method for controlling the welding quality of a steel-aluminum joint, which is convenient to install and reasonable in design.
The invention realizes the purpose through the following technical scheme:
a steel-aluminum joint welding quality control method comprises the following steps: step 1: degreasing the steel-aluminum joint, and cleaning surface pollutants before welding; step 2: welding a stainless steel end and then welding an aluminum alloy end; and step 3: and monitoring the welding temperature in real time, stopping welding if the temperature of the welding joint exceeds a threshold value, and continuing welding after the temperature of the joint is reduced to another threshold value.
As a further optimization scheme of the invention, step 2: and when welding each joint, cooling by adopting a water cooling method.
As a further optimization scheme of the invention, step 2: when the stainless steel end is welded, the aluminum alloy end is placed in a water tank, cold water is filled in the water tank, a water outlet is formed in the steel-aluminum junction surface, a water inlet is formed in the bottom of the steel-aluminum junction surface, and the water inlet and the water outlet are both connected with a circulating pipeline.
As a further optimization scheme of the invention, step 2: when welding the aluminum alloy end, utilize wet towel parcel steel aluminium to connect, and include the rubber gasket in the outside of wet towel to the bottom of rubber gasket is tied up, and the rubber gasket is around forming set body, sets up the water inlet in the top of the cover body, and the cover body is close to the sealed outlet pipe that sets up in bottom position, during the welding, adds cold water to the water inlet, and accepts the water that the outlet pipe flows.
As a further optimization scheme of the invention, step 3: during welding, temperature labels are pasted on the stainless steel end and the aluminum alloy end, and a temperature measuring gun is adopted to measure the temperature of the welding position in real time.
The invention has the beneficial effects that: the method for welding the steel-aluminum joint can effectively prevent the quality failure problem after the steel-aluminum joint is welded, can provide good water cooling capacity when a stainless steel end and an aluminum alloy end are welded by utilizing two different water cooling modes, cannot cause adverse effects on the welding of the steel-aluminum joint, has higher practicability and is convenient to be carried out on a construction site, can effectively improve the quality of the welded steel-aluminum joint and is convenient to popularize and use.
Detailed Description
The present application is described in further detail below, and it should be noted that the following detailed description is provided for illustrative purposes only, and is not intended to limit the scope of the present application, which is defined by the appended claims.
Example 1
A steel-aluminum joint welding quality control method comprises the following steps: step 1: degreasing the steel-aluminum joint, cleaning surface pollutants before welding, and directly cleaning the joint by adopting an alcohol wiping mode; step 2: welding a stainless steel end firstly, welding an aluminum alloy end secondly, and cooling by adopting a water cooling method when each joint is welded, wherein the water cooling method comprises the following two parts: when a stainless steel end is welded, the aluminum alloy end is placed in a water tank, cold water is filled in the water tank, a water outlet is arranged at the steel-aluminum junction surface, a water inlet is arranged at the bottom, and the water inlet and the water outlet are both connected with a circulating pipeline; when an aluminum alloy end is welded, a wet towel is used for wrapping a steel-aluminum connector, a rubber gasket is arranged outside the wet towel, the bottom of the rubber gasket is fastened, the rubber gasket surrounds to form a sleeve body, a water inlet is arranged above the sleeve body, a water outlet pipe is arranged at a position, close to the bottom, of the sleeve body in a sealing mode, cold water is added into the water inlet during welding, water flowing out of the water outlet pipe is received, when the aluminum alloy end is welded, the water inlet flow rate is equal to the water outlet flow rate, when water flows through a large area, the bottom of a pipeline welding seam is easily sprayed by water, the defects that the welding seam generates air holes or cracks and the like, the welding seam quality is affected, meanwhile, water is heated and; and step 3: monitoring the welding temperature in real time, wherein if the temperature of the welding joint exceeds a threshold value, the threshold value is set to be lower than 150 ℃, 145 ℃ is selected in the embodiment, when the temperature is reached, the welding is stopped, and when the temperature of the steel-aluminum joint is higher than or equal to 150 ℃, the temperature of the steel-aluminum joint is too high, so that the quality of the joint is easy to lose efficacy, and at the moment, the steel-aluminum joint needs to be replaced; when the temperature of the joint is reduced to another threshold value, which is 80 ℃ in the embodiment, when the temperature is cooled to the temperature, the welding is continued, if the temperature is lower than the temperature, the temperature of the aluminum alloy head is not favorably increased, the welding completion degree is easily influenced, and during welding, temperature labels are respectively pasted on the stainless steel end and the aluminum alloy end, and the temperature of the welding position is measured in real time by adopting a temperature measuring gun.
It should also be noted that in the construction process of the on-site steel-aluminum joint, the material management is enhanced, the ventilation and the drying of the storehouse site and the classified arrangement of different materials are kept, and the corrosion of the steel-aluminum joint can be effectively reduced; the welding temperature of the steel-aluminum joint is strictly controlled by adopting an effective cooling method, so that the failure of the welding quality of the steel-aluminum joint can be avoided.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (5)
1. A steel-aluminum joint welding quality control method is characterized by comprising the following steps: the method comprises the following steps: step 1: degreasing the steel-aluminum joint, and cleaning surface pollutants before welding; step 2: welding a stainless steel end and then welding an aluminum alloy end; and step 3: and monitoring the welding temperature in real time, stopping welding if the temperature of the welding joint exceeds a threshold value, and continuing welding after the temperature of the joint is reduced to another threshold value.
2. The method for controlling the welding quality of the steel-aluminum joint according to claim 1, wherein the method comprises the following steps: step 2: and when welding each joint, cooling by adopting a water cooling method.
3. The method for controlling the welding quality of the steel-aluminum joint according to claim 2, wherein the method comprises the following steps: step 2: when the stainless steel end is welded, the aluminum alloy end is placed in a water tank, cold water is filled in the water tank, a water outlet is formed in the steel-aluminum junction surface, a water inlet is formed in the bottom of the steel-aluminum junction surface, and the water inlet and the water outlet are both connected with a circulating pipeline.
4. The method for controlling the welding quality of the steel-aluminum joint according to claim 2, wherein the method comprises the following steps: step 2: when welding the aluminum alloy end, utilize wet towel parcel steel aluminium to connect, and include the rubber gasket in the outside of wet towel to the bottom of rubber gasket is tied up, and the rubber gasket is around forming set body, sets up the water inlet in the top of the cover body, and the cover body is close to the sealed outlet pipe that sets up in bottom position, during the welding, adds cold water to the water inlet, and accepts the water that the outlet pipe flows.
5. The method for controlling the welding quality of the steel-aluminum joint according to claim 1, wherein the method comprises the following steps: and step 3: during welding, temperature labels are pasted on the stainless steel end and the aluminum alloy end, and a temperature measuring gun is adopted to measure the temperature of the welding position in real time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010213487.7A CN111390415A (en) | 2020-03-24 | 2020-03-24 | Welding quality control method for steel-aluminum joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010213487.7A CN111390415A (en) | 2020-03-24 | 2020-03-24 | Welding quality control method for steel-aluminum joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111390415A true CN111390415A (en) | 2020-07-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010213487.7A Pending CN111390415A (en) | 2020-03-24 | 2020-03-24 | Welding quality control method for steel-aluminum joint |
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| CN (1) | CN111390415A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3495319A (en) * | 1966-10-25 | 1970-02-17 | Kaiser Aluminium Chem Corp | Steel-to-aluminum transition joint |
| JP2008207226A (en) * | 2007-02-27 | 2008-09-11 | Sumitomo Light Metal Ind Ltd | Mig welded joint and mig welding process for aluminum material and steel |
| CN203599787U (en) * | 2013-11-27 | 2014-05-21 | 浙江大川空分设备有限公司 | Water-passing type tool clamp for steel aluminum transition connector |
| CN203621799U (en) * | 2013-11-27 | 2014-06-04 | 浙江大川空分设备有限公司 | Immersion type steel-aluminum transition joint work fixture |
| CN204893254U (en) * | 2015-09-14 | 2015-12-23 | 成都深冷液化设备股份有限公司 | Steel aluminium connects welding set |
| CN109986192A (en) * | 2019-03-28 | 2019-07-09 | 湖北金兰特种金属材料有限公司 | Aluminum steel connector explosion welding method |
| CN110253169A (en) * | 2019-07-05 | 2019-09-20 | 浙江智海化工设备工程有限公司 | A kind of New Large Caliber steel aluminium joint welding method |
-
2020
- 2020-03-24 CN CN202010213487.7A patent/CN111390415A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3495319A (en) * | 1966-10-25 | 1970-02-17 | Kaiser Aluminium Chem Corp | Steel-to-aluminum transition joint |
| JP2008207226A (en) * | 2007-02-27 | 2008-09-11 | Sumitomo Light Metal Ind Ltd | Mig welded joint and mig welding process for aluminum material and steel |
| CN203599787U (en) * | 2013-11-27 | 2014-05-21 | 浙江大川空分设备有限公司 | Water-passing type tool clamp for steel aluminum transition connector |
| CN203621799U (en) * | 2013-11-27 | 2014-06-04 | 浙江大川空分设备有限公司 | Immersion type steel-aluminum transition joint work fixture |
| CN204893254U (en) * | 2015-09-14 | 2015-12-23 | 成都深冷液化设备股份有限公司 | Steel aluminium connects welding set |
| CN109986192A (en) * | 2019-03-28 | 2019-07-09 | 湖北金兰特种金属材料有限公司 | Aluminum steel connector explosion welding method |
| CN110253169A (en) * | 2019-07-05 | 2019-09-20 | 浙江智海化工设备工程有限公司 | A kind of New Large Caliber steel aluminium joint welding method |
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Application publication date: 20200710 |