CN108890093A - A kind of narrow gap welding method and weldment - Google Patents
A kind of narrow gap welding method and weldment Download PDFInfo
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- CN108890093A CN108890093A CN201810803049.9A CN201810803049A CN108890093A CN 108890093 A CN108890093 A CN 108890093A CN 201810803049 A CN201810803049 A CN 201810803049A CN 108890093 A CN108890093 A CN 108890093A
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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
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/173—Arc welding or cutting making use of shielding gas and of a consumable electrode
-
- 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
- B23K33/00—Specially-profiled edge portions of workpieces for making soldering or welding connections; Filling the seams formed thereby
- B23K33/004—Filling of continuous seams
-
- 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
- B23K9/02—Seam welding; Backing means; Inserts
- B23K9/0213—Narrow gap 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
- B23K9/00—Arc welding or cutting
- B23K9/02—Seam welding; Backing means; Inserts
- B23K9/025—Seam welding; Backing means; Inserts for rectilinear seams
-
- 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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- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Arc Welding In General (AREA)
Abstract
The present invention relates to welding technology fields, provide a kind of narrow gap welding method, the I shape groove gap for being 2~5mm for weld width, including following method：Ceramic substrate on the one side pad at groove is corresponded in part to be welded；It is welded when being preheated to 210~230 DEG C, part to be welded is kept the temperature in the welding process, so that part to be welded is maintained at 210~230 DEG C, backing welding, filling weldering and cosmetic welding are successively carried out using melting pole gas shielded arc welding；The rate of temperature fall for controlling weld seam is 230~500 DEG C/h, continues to keep the temperature in temperature-fall period, and holding temperature is 210~230 DEG C；Stop heat preservation when weld seam is cooled to 210~230 DEG C, control weldment entirety rate of temperature fall is 50~80 DEG C/h until weldment is cooled to room temperature.The weldment flawless that this method is welded, intensity are high.A kind of weldment welds to obtain using above-mentioned narrow gap welding method.The weldment flawless, intensity are high.
Description
Technical field
The present invention relates to welding technology field fields, in particular to a kind of narrow gap welding method and weldment.
Background technique
Welding, also referred to as welding, Rong connects, and is a kind of jointing metal in a manner of heating, high temperature or high pressure or other heat
The manufacturing process and technology of plastic material such as plastics.The range of welding is related to too many field, especially occupies in the industry important
Status, narrow gap welding be connected in part to be welded weld width it is smaller when welding manner, existing narrow gap welding technology due to welding
Method setting is unreasonable to be easy to cause crackle to occur.
In consideration of it, special propose the application.
Summary of the invention
The present invention provides a kind of narrow gap welding methods, it is intended to improve what existing narrow gap welding technology was welded
The easily cracked problem of weldment.
The present invention also provides a kind of weldment, the weldment flawless, intensity is high.
The invention is realized in this way：
A kind of narrow gap welding method, the I shape groove gap for being 2~5mm for weld width, including following measured step are rapid：
Ceramic substrate on the one side pad at groove is corresponded in part to be welded；
210~230 DEG C are preheated to part to be welded；
It is welded when part to be welded temperature reaches 210~230 DEG C, part to be welded is kept the temperature in the welding process, made
It obtains part to be welded and is maintained at 210~230 DEG C, backing welding, filling weldering and capping are successively carried out using melting pole gas shielded arc welding
Weldering；
Cool down after the completion of welding, the rate of temperature fall for controlling commissure is 230~500 DEG C/h, still right in temperature-fall period
Weldment is kept the temperature, and holding temperature is 210~230 DEG C；
Stop heat preservation when temperature is down to 210~230 DEG C when commissure, control weldment entirety rate of temperature fall is 50~80 DEG C/h
Until weldment is cooled to room temperature.
A kind of weldment welds to obtain using above-mentioned narrow gap welding method.
The beneficial effects of the invention are as follows：The narrow gap welding method that the present invention obtains by above-mentioned design, in use, due to
Part to be welded is preheated to suitable temperature, heat preservation operation is carried out after preheating when part to be welded welds, continues butt-welding fitting after the completion of welding
It carries out heat preservation and is cooled down at weld seam with suitable rate of temperature fall, it is whole suitably to drop again after weld seam is cooled to holding temperature
Warm rate cooling, so that the weldment flawless that welding obtains, intensity is high, and quality is good.
The weldment that the present invention obtains by above-mentioned design, use narrow gap welding method provided by the invention weld and
At so its flawless, intensity is high.
Detailed description of the invention
It, below will be to use required in embodiment in order to illustrate more clearly of the technical solution of embodiment of the present invention
Attached drawing be briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not to be seen as
It is the restriction to range, it for those of ordinary skill in the art, without creative efforts, can be with root
Other relevant attached drawings are obtained according to these attached drawings.
Structural schematic diagram when Fig. 1 is the welding weldment for the narrow gap welding method that embodiment of the present invention provides.
Icon：1- ceramic substrate；11- backing welding；12- filling weldering；13- cosmetic welding.
Specific embodiment
It in order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below will be in the embodiment of the present invention
Technical solution be clearly and completely described.The person that is not specified actual conditions in embodiment, according to normal conditions or manufacturer builds
The condition of view carries out.Reagents or instruments used without specified manufacturer is the conventional production that can be obtained by commercially available purchase
Product.
A kind of narrow gap welding method is provided to the embodiment of the present invention below and weldment is specifically described.
A kind of narrow gap welding method, the I shape groove gap for being 2~5mm for weld width, includes the following steps：
S1, ceramic substrate on the one side pad at groove is corresponded in part to be welded.
Specifically, part to be welded surface is cleared up first, rinses out the dirty of surface and dry, and sand paper can be used and grind off
The oxide layer on surface.Especially groove position needs emphasis to clear up, and guarantees in groove at least 40mm without greasy dirt, with prevent because
The presence of greasy dirt and the intensity for reducing weldment.Then the part to be welded cleaned out is placed in weld job position to fix, such as Fig. 1
It is shown, ceramic substrate 1 on the one side pad at groove is corresponded in part to be welded, to guarantee root of joint through welding and back of weld forming.
S2,210~230 DEG C are preheated to part to be welded.
On pad after ceramic substrate, part to be welded is preheated to temperature and reaches 210~230 DEG C.Preferably, to prevent shock heating treat
Weldment internal microstructure produces bigger effect, and pre-heating temperature elevation rate is less than 250 DEG C/h.
S3, it is welded when part to be welded temperature reaches 210~230 DEG C, part to be welded is kept the temperature in the welding process,
So that part to be welded is maintained at 210~230 DEG C, backing welding, filling weldering and lid are successively carried out using melting pole gas shielded arc welding
Face weldering.
Specifically, welded when by part to be welded pre-heating temperature elevation to 210~230 DEG C, welding process persistently to part to be welded into
Row heat preservation, holding temperature is still 210~230 DEG C.As shown in Figure 1, welding process using melting pole gas shielded arc welding according to
Secondary progress backing welding 11, filling weldering 12 and cosmetic welding 13.Gas shield can make molten drop, molten pool metal and welding section high-temperature metal
From the illeffects of surrounding air.And the electrode of use fusing, it electrode melting will fill afterwards to weld seam to fill up overland route.It needs
It is welded using melting pole gas shielded arc welding along welding bead.It specifically, is the stability of guarantee welding process using straight
Diameter is that the solid welding wire of 0.7~1.2mm is welded, and when carrying out backing welding, welding current is 115~135A, voltage for 25~
30V, single layer welding in welding current are 310~330A after backing welding, and arc voltage is filled out under the conditions of being 35~37V
Weldering and cosmetic welding are filled, filling weldering is multi-pass welding.
Preferably, it is 8~9 that protective gas, which is preferably volume ratio,:1 argon gas and the gaseous mixture of carbon dioxide.The component is matched
The protective gas of ratio can be improved arc stability and improve appearance of weld.
Preferably, improve appearance of weld, protective gas stream to make it possible to further improve arc stability with further
Amount is 22~25L/min.
Preferably, welding process is welded with the bonding speed of 40~100mm/min.Low speed welding is beneficial to prevent steel
Crackle generates after part is cooling.
Cool down after the completion of S4, welding, the rate of temperature fall for controlling commissure is 230~500 DEG C/h, in temperature-fall period still
Weldment is kept the temperature, holding temperature is 210~230 DEG C.
Specifically, commissure temperature is very high after the completion of welding, should cool down first to commissure, and temperature-fall period should control
Within the scope of suitable rate of temperature fall, rate of temperature fall is unsuitable excessively high for it, rate of temperature fall is excessively high may result in it is cooling after weld seam it is attached
Close easily cracked, rate of temperature fall is also unsuitable too low, and rate of temperature fall is too low to be made commissure be in the condition of high temperature for a long time to lean on
The position of nearly weldment weld seam it is in an overheated state for a long time can rigidity, hardness to weldment have some impact on.Therefore, when
The rate of temperature fall of weld is preferable when being 230~500 DEG C/h.Still weldment is kept the temperature in temperature-fall period, heat preservation temperature
Degree is still 210~230 DEG C.
S5, stop heat preservation when commissure temperature is down to 210~230 DEG C, control weldment entirety rate of temperature fall is 50~80
DEG C/h until weldment be cooled to room temperature.
Specifically, when the temperature of weldment commissure is when the rate of temperature fall of 230~500 DEG C/h drops to 210~230 DEG C
It can then stop keeping the temperature, the bulk temperature of weldment is in 210~230 DEG C at this time, further to guarantee weld seam after cooling
It is not in nearby crackle, control rate of temperature fall is 50~80 DEG C/h until weldment is cooled to room temperature finished product weldment.
More further, the intensity for the weldment that this method is welded when the groove depth of part to be welded is 20~50mm
It is higher.
A kind of weldment uses narrow gap welding method provided by the invention to weld to obtain, near the weldment weld seam
Flawless, intensity are high.
A kind of narrow gap welding method provided by the invention is specifically described below in conjunction with specific embodiment.
Embodiment 1
Present embodiments provide a kind of narrow gap welding method and weldment.
A kind of narrow gap welding method, includes the following steps：
The part to be welded for the I shape groove gap that slope surface depth is 20mm, weld width is 5mm is cleared up, table is rinsed out
The dirty of face is dried, and the oxide layer on surface is ground off using sand paper.Guarantee in groove at least 40mm without greasy dirt.Weldment cleaning
After clean, ceramic substrate on the one side pad at groove is corresponded in part to be welded.
Part to be welded is preheated to 210 DEG C.Soldering appliance is powered, using melting pole gas shielded arc welding, is successively beaten
Back welding, filling weldering and cosmetic welding, welding process keep the temperature part to be welded, so that part to be welded temperature is maintained at 210 degrees Celsius of left sides
The right side, protective gas are that volume ratio is 8:1 argon gas and the gaseous mixture of carbon dioxide, gas flow 22L/min, when backing welding
Electric current is 115A, voltage 25V, and the electric current of filling weldering and cosmetic welding is 310A, arc voltage 37V, and gage of wire is
0.7mm, bonding speed 100mm/min.
First cool down to commissure after the completion of welding, rate of temperature fall is 230 DEG C/h, is carrying out temperature-fall period to commissure
In still weldment is kept the temperature, holding temperature be 210 DEG C, when commissure, temperature is down to 210 DEG C, cancel heat preservation, butt welding
Fitting integrally cools down, and rate of temperature fall is 50 DEG C/h.Obtain finished product weldment provided by the invention.
Embodiment 2
Present embodiments provide a kind of narrow gap welding method and weldment.
A kind of narrow gap welding method, includes the following steps：
The part to be welded for the I shape groove gap that slope surface depth is 50mm, weld width is 2mm is cleared up, table is rinsed out
The dirty of face is dried, and the oxide layer on surface is ground off using sand paper.Guarantee in groove at least 40mm without greasy dirt.Weldment cleaning
After clean, ceramic substrate on the one side pad at groove is corresponded in part to be welded.
Part to be welded is preheated to 230 DEG C.Soldering appliance is powered, using melting pole gas shielded arc welding, is successively beaten
Back welding, filling weldering and cosmetic welding, welding process keep the temperature part to be welded, so that part to be welded temperature is maintained at 230 degrees Celsius of left sides
The right side, protective gas are that volume ratio is 9:1 argon gas and the gaseous mixture of carbon dioxide, gas flow 23L/min, when backing welding
Electric current is 135A, voltage 30V, and the electric current of filling weldering and cosmetic welding is 320A, arc voltage 36V, and gage of wire is
1.2mm, bonding speed 40mm/min.
First cool down to commissure after the completion of welding, rate of temperature fall is 500 DEG C/h, is carrying out temperature-fall period to commissure
In still weldment is kept the temperature, holding temperature be 230 DEG C, when commissure, temperature is down to 230 DEG C, cancel heat preservation, butt welding
Fitting integrally cools down, and rate of temperature fall is 80 DEG C/h.Obtain finished product weldment provided by the invention.
Embodiment 3
Present embodiments provide a kind of narrow gap welding method and weldment.
A kind of narrow gap welding method, includes the following steps：
The part to be welded for the I shape groove gap that slope surface depth is 30mm, weld width is 3mm is cleared up, table is rinsed out
The dirty of face is dried, and the oxide layer on surface is ground off using sand paper.Guarantee in groove at least 40mm without greasy dirt.Weldment cleaning
After clean, ceramic substrate on the one side pad at groove is corresponded in part to be welded.
Part to be welded is preheated to 220 DEG C.Soldering appliance is powered, using melting pole gas shielded arc welding, is successively beaten
Back welding, filling weldering and cosmetic welding, welding process keep the temperature part to be welded, so that part to be welded temperature is maintained at 220 degrees Celsius of left sides
The right side, protective gas are that volume ratio is 9:1 argon gas and the gaseous mixture of carbon dioxide, gas flow 25L/min, when backing welding
Electric current is 120A, voltage 26V, and the electric current of filling weldering and cosmetic welding is 330A, arc voltage 37V, and gage of wire is
1.1mm, bonding speed 50mm/min.
First cool down to commissure after the completion of welding, rate of temperature fall is 300 DEG C/h, is carrying out temperature-fall period to commissure
In still weldment is kept the temperature, holding temperature be 220 DEG C, when commissure, temperature is down to 220 DEG C, cancel heat preservation, butt welding
Fitting integrally cools down, and rate of temperature fall is 60 DEG C/h.Obtain finished product weldment provided by the invention.
Embodiment 4
Present embodiments provide a kind of narrow gap welding method and weldment.
A kind of narrow gap welding method, includes the following steps：
The part to be welded for the I shape groove gap that slope surface depth is 40mm, weld width is 4mm is cleared up, table is rinsed out
The dirty of face is dried, and the oxide layer on surface is ground off using sand paper.Guarantee in groove at least 40mm without greasy dirt.Weldment cleaning
After clean, ceramic substrate on the one side pad at groove is corresponded in part to be welded.
Part to be welded is preheated to 215 DEG C.Soldering appliance is powered, using melting pole gas shielded arc welding, is successively beaten
Back welding, filling weldering and cosmetic welding, welding process keep the temperature part to be welded, so that part to be welded temperature is maintained at 215 degrees Celsius of left sides
The right side, protective gas are that volume ratio is 8:1 argon gas and the gaseous mixture of carbon dioxide, gas flow 24L/min, when backing welding
Electric current is 125A, voltage 27V, and the electric current of filling weldering and cosmetic welding is 325A, arc voltage 36V, and gage of wire is
0.8mm, bonding speed 60mm/min.
First cool down to commissure after the completion of welding, rate of temperature fall is 400 DEG C/h, is carrying out temperature-fall period to commissure
In still weldment is kept the temperature, holding temperature be 215 DEG C, when commissure, temperature is down to 215 DEG C, cancel heat preservation, butt welding
Fitting integrally cools down, and rate of temperature fall is 70 DEG C/h.Obtain finished product weldment provided by the invention.
Embodiment 5
Present embodiments provide a kind of narrow gap welding method and weldment.
A kind of narrow gap welding method, includes the following steps：
The part to be welded for the I shape groove gap that slope surface depth is 35mm, weld width is 3mm is cleared up, table is rinsed out
The dirty of face is dried, and the oxide layer on surface is ground off using sand paper.Guarantee in groove at least 40mm without greasy dirt.Weldment cleaning
After clean, ceramic substrate on the one side pad at groove is corresponded in part to be welded.
Part to be welded is preheated to 225 DEG C.Soldering appliance is powered, using melting pole gas shielded arc welding, is successively beaten
Back welding, filling weldering and cosmetic welding, welding process keep the temperature part to be welded, so that part to be welded temperature is maintained at 225 degrees Celsius of left sides
The right side, protective gas are that volume ratio is 8:1 argon gas and the gaseous mixture of carbon dioxide, gas flow 23L/min, when backing welding
Electric current is 120A, voltage 28V, and the electric current of filling weldering and cosmetic welding is 320A, arc voltage 36.5V, and gage of wire is
0.9mm, bonding speed 90mm/min.
First cool down to commissure after the completion of welding, rate of temperature fall is 450 DEG C/h, is carrying out temperature-fall period to commissure
In still weldment is kept the temperature, holding temperature be 225 DEG C, when commissure, temperature is down to 225 DEG C, cancel heat preservation, butt welding
Fitting integrally cools down, and rate of temperature fall is 65 DEG C/h.Obtain finished product weldment provided by the invention.
Comparative example 1
This comparative example is substantially the same manner as Example 3, the difference is that not protected in the welding process after weldment preheating
Temperature.
Comparative example 2
This comparative example is substantially the same manner as Example 3, the difference is that removing the guarantor of butt-welding fitting after the completion of weldment welding
Temperature, commissure is after removing heat preservation with 300 DEG C/h cooling, and weldment other positions are with 60 DEG C/h cooling.
Comparative example 3
This comparative example is substantially the same manner as Example 2, the difference is that weldment welding after the completion of commissure rate of temperature fall
For 550 DEG C/h.
Comparative example 4
This comparative example is substantially the same manner as Example 2, the difference is that be cooled to 230 Celsius for weld seam after the completion of weldment welding
After degree, the whole rate of temperature fall of weldment is 90 DEG C/h.
Experimental example
Take 50 have 5 years or more veteran welders to weldment made from embodiment 1-5 and comparative example 1-4 into
Row observation, it is believed that there is the number record of crackle to enter table 1.
Table 1 thinks there is crackle number record
From table 1, it can be seen that weldment made from the present embodiment method nobody think there is crackle appearance, therefore can obtain
Out, the quality of weldment made from narrow gap welding method provided in this embodiment is good.Comparative example 1 and embodiment 3 are compared, it is right
For ratio 1 due to not kept the temperature, final weldment obtained has 26 to think personally it with crackle, it can be seen that, part to be welded exists
Welding process and temperature-fall period heat preservation can effectively prevent the generation of crackle；Comparative example 2 and embodiment 3 are compared, comparative example 2
Due to removing heat preservation to weldment after the completion of welding, final weldment obtained have 12 think personally its with crackle, by
This is as it can be seen that weldment is kept the temperature after the completion of welding is cooled to suitable temperature to commissure and is integrally cooled to holding temperature again and can have
Effect prevents the generation of crackle；Comparative example 3 and embodiment 2 are compared, the rate of temperature fall of commissure is higher than the present invention after the completion of welding
When in claimed range, the weldment welded has 9 people to think there is crackle, thus, it is possible to illustrate, welds after the completion of welding
The rate of temperature fall of seam within the scope of the claimed invention when can prevent crackle from generating；Comparative example 4 and embodiment 2 are compared,
There are 5 people to think that comparative example 4 welds obtained weldment and has a crackle, and comparative example 4 is compared to embodiment 2, rate of temperature fall does not exist
The present invention claims rate of temperature fall within the scope of, it can be seen that, when the welding is completed, weld seam is down to when requiring temperature, and weldment is whole
The rate of temperature fall of body the present invention claims in the range of when crackle can be further prevented to generate.
In conclusion narrow gap welding method provided in an embodiment of the present invention, the I shape slope for being 2~5mm for weld width
Mouth gap carries out heat preservation operation when part to be welded welds after preheating, after the completion of welding since part to be welded is preheated to suitable temperature
Continue to carry out weldment heat preservation and be cooled down at weld seam with suitable rate of temperature fall, it is whole again after weld seam is cooled to holding temperature
Body is cooled down with suitable rate of temperature fall, so that the weldment flawless that welding obtains, intensity is high, and quality is good.
Weldment provided in an embodiment of the present invention uses narrow gap welding method provided by the invention to be welded, therefore
And its flawless, intensity are high.
The foregoing is merely the preferred embodiment of the present invention, are not intended to restrict the invention, for this field
For technical staff, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any
Modification, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of narrow gap welding method, which is characterized in that the I shape groove gap for being 2~5mm for weld width, including such as
Lower step：
Ceramic substrate on the one side pad at groove is corresponded in part to be welded；
210~230 DEG C are preheated to part to be welded；
It is welded when part to be welded temperature reaches 210~230 DEG C, part to be welded is kept the temperature in the welding process, so as to
Weldment is maintained at 210~230 DEG C, and backing welding, filling weldering and cosmetic welding are successively carried out using melting pole gas shielded arc welding；
Cool down after the completion of welding, the rate of temperature fall for controlling commissure is 230~500 DEG C/h, still to welding in temperature-fall period
Part is kept the temperature, and holding temperature is 210~230 DEG C；
Stop heat preservation when temperature is down to 210~230 DEG C when commissure, control weldment entirety rate of temperature fall be 50~80 DEG C/h until
Weldment is cooled to room temperature.
2. narrow gap welding method according to claim 1, which is characterized in that carrying out welding current when backing welding is 115
~135A, voltage are 25~30V.
3. narrow gap welding method according to claim 1, which is characterized in that when being filled weldering and cosmetic welding process,
Welding current is 310~330A, and arc voltage is 35~37V.
4. narrow gap welding method according to claim 1, which is characterized in that protective gas is mixed gas, described mixed
Conjunction gas includes that volume ratio is 8~9:1 argon gas and carbon dioxide.
5. narrow gap welding method according to claim 4, which is characterized in that shield gas flow rate is 22~25L/min.
6. narrow gap welding method according to claim 1, which is characterized in that use diameter for the solid of 0.7~1.2mm
Welding wire is welded.
7. narrow gap welding method according to claim 1, which is characterized in that welding process is with 40~100mm/min's
Bonding speed is welded.
8. narrow gap welding method according to claim 1, which is characterized in that on the pad of the back side of the part to be welded groove
Further include clearing up the groove of the part to be welded before the ceramic substrate, guarantees groove and in groove at least 40mm
Without greasy dirt.
9. narrow gap welding method according to claim 1, which is characterized in that the groove depth is 20~50mm.
10. a kind of weldment, which is characterized in that welded using the narrow gap welding method as described in claim any one of 1-9
It arrives.
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| CN201810803049.9A CN108890093A (en) | 2018-07-20 | 2018-07-20 | A kind of narrow gap welding method and weldment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4265371A4 (en) * | 2021-03-18 | 2024-06-05 | Jfe Steel Corp | Gas shield arc welding method, welding joint, and method for producing welding joint |
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| EP4265371A4 (en) * | 2021-03-18 | 2024-06-05 | Jfe Steel Corp | Gas shield arc welding method, welding joint, and method for producing welding joint |
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