CN108907419A - A kind of single V groove with root face welding method and weldment - Google Patents
A kind of single V groove with root face welding method and weldment Download PDFInfo
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- CN108907419A CN108907419A CN201810809429.3A CN201810809429A CN108907419A CN 108907419 A CN108907419 A CN 108907419A CN 201810809429 A CN201810809429 A CN 201810809429A CN 108907419 A CN108907419 A CN 108907419A
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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
- 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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/38—Selection of media, e.g. special atmospheres for surrounding the working area
- B23K35/383—Selection of media, e.g. special atmospheres for surrounding the working area mainly containing noble gases or nitrogen
-
- 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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- Engineering & Computer Science (AREA)
- 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 single V groove with root face welding method, include the following steps：Y-shaped groove is opened up at two pieces with a thickness of the part to be welded weld of 10~26mm；Two pieces of parts to be welded are preheated to 210~230 DEG C；Part to be welded temperature is welded when reaching 210~230 DEG C, is kept the temperature in the welding process to part to be welded, so that part to be welded is maintained at 210~230 DEG C；Cool down after the completion of welding, the rate of temperature fall for controlling weld is 230~500 DEG C/h, is still kept the temperature to weldment in temperature-fall period, and holding temperature is 210~230 DEG C；Stop heat preservation when weld temperature is down to 210~230 DEG C, control 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 single V groove with root face welding method.The weldment intensity is high.
Description
Technical field
The present invention relates to welding technology fields, in particular to a kind of single V groove with root face 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 an important position in the industry, and existing single V groove with root face welds skill
Art is easy to cause weldment crack to occur due to unreasonable to temperature control.
In consideration of it, special propose the application.
Summary of the invention
The present invention provides a kind of single V groove with root face welding methods, it is intended to improve easily cracked problem.
The present invention also provides a kind of weldment, flawless, intensity is high.
The invention is realized in this way：
A kind of single V groove with root face welding method, includes the following steps：
Y-shaped groove is opened up in two pieces of part to be welded welds with a thickness of 10~26mm, root gap width is 1~3mm,
Depth is 1~4mm, and groove subtended angle is 40 °~60 °；
Two pieces of parts to be welded are preheated to 210~230 DEG C；
Part to be welded temperature is welded when reaching 210~230 DEG C, is kept the temperature in the welding process to part to be welded, so as to be welded
Part is maintained at 210~230 DEG C；
Cool down after the completion of welding, the rate of temperature fall for controlling weld 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 weld temperature is down to 210~230 DEG C, control rate of temperature fall is 50~80 DEG C/h until welding
Part is cooled to room temperature.
A kind of weldment welds to obtain using above-mentioned single V groove with root face welding method.
The beneficial effects of the invention are as follows：The single V groove with root face welding method that the present invention obtains by above-mentioned design is suitble to welding thick
Degree is the part to be welded of 10~26mm, since part to be welded is preheated to suitable temperature, is kept the temperature after preheating when part to be welded welds
Operation is continued to carry out weldment heat preservation after the completion of welding and be cooled down at weld seam with suitable rate of temperature fall, cooled down to weld seam
Whole with the cooling of suitable rate of temperature fall again after to holding temperature, so that the weldment flawless that welding obtains, intensity is high, quality
It is good, and this method is easy to operate, can effectively save human cost.
The weldment that the present invention obtains by above-mentioned design uses single V groove with root face welding method provided by the invention to weld
It forms, 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.
Fig. 1 is the structural schematic diagram at the welding groove for the single V groove with root face welding method that embodiment of the present invention provides.
Icon：11- groove；The root of 12- groove；21- ceramic substrate.
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 single V groove with root face welding method is provided to the embodiment of the present invention below and weldment is specifically described.
A kind of single V groove with root face welding method, includes the following steps：
S1, Y-shaped groove is opened up in two pieces of part to be welded welds with a thickness of 10~26mm, root gap width is 1~
3mm, depth are 1~4mm, and groove subtended angle is 40 °~60 °.
Specifically, two pieces of surfaces with a thickness of 10~26mm part to be welded are cleared up, rinse out the dirty of surface and dried in the air
It is dry, and the oxide layer that sand paper grinds off surface can be used.Then the part to be welded cleaned out is placed in weld job position.
As shown in Figure 1, opening up Y-shaped groove 11,12 gap width of root of groove in the position that part to be welded will weld
For 1~3mm, depth is 1~4mm, 40 °~60 ° of 11 subtended angle of groove.
Groove pads in the side of the root of groove after opening up and sets ceramic substrate 21.To guarantee root of joint through welding and weld seam
Back-welding shape.
S2, two pieces of parts to be welded are preheated to 210~230 DEG C.
Specifically, on pad after ceramic substrate, part to be welded is preheated to temperature and reaches 210~230 DEG C.Preferably, to prevent
Shock heating to produce bigger effect to part to be welded internal microstructure, pre-heating temperature elevation rate is less than 250 DEG C/h.
S3, part to be welded temperature are welded when reaching 210~230 DEG C, are kept the temperature in the welding process to part to be welded, so as to
Weldment is maintained at 210~230 DEG C.
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.It is welded when being warming up to 210~230 DEG C and keeps the temperature welding, it is mainly anti-
Only other positions of welding process steel plate cool down so that commissure is larger with the steel plate other positions temperature difference and influences what welding obtained
The intensity of steel plate.As shown in Figure 1, welding process welds groove using melting pole gas shielded arc welding, slope is first welded
The root 12 of mouth, multi-pass welding is until filling up groove.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.
Preferably, the stability for guarantee welding process uses diameter to be welded for the solid welding wire of 1~1.5mm.
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.
Specifically, to weld efficiently high-quality progress, the electric current of welding process is 310~330A, arc voltage 35
~37V.
Preferably, welding process is welded with the bonding speed of 40~100mm/min.Low speed welding is beneficial to prevent weldering
Crackle generates after fitting is cooling.
Cool down after the completion of S4, welding, the rate of temperature fall for controlling weld is 230~500 DEG C/h, in temperature-fall period still
Weldment is kept the temperature, holding temperature is 210~230 DEG C.
Commissure temperature is very high after the completion of welding, should cool down first to commissure, and temperature-fall period should control it and close
Within the scope of suitable rate of temperature fall, rate of temperature fall is unsuitable excessively high, rate of temperature fall is excessively high may result in it is cooling after weld seam nearby easily go out
Existing crackle, 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 make close to steel plate
The position of weld seam it is in an overheated state for a long time can rigidity, hardness to steel plate have some impact on.Therefore, when the drop of weld
Warm rate is preferable when being 230~500 DEG C/h.Still weldment is kept the temperature in temperature-fall period, holding temperature is still 210~
230℃。
S5, when weld temperature is down to 210~230 DEG C stop heat preservation, control rate of temperature fall be 50~80 DEG C/h until
Weldment is cooled to room temperature.
It specifically, then can be with when the rate of temperature fall of 230~500 DEG C/h drops to 210~230 DEG C when the temperature of weld
Stopping heat preservation, the bulk temperature of weldment is in 210~230 DEG C at this time, near weld after further guarantee cooling
It is not in crackle, control rate of temperature fall is 50~80 DEG C/h until weldment is cooled to room temperature obtained weldment.
A kind of weldment uses single V groove with root face welding method provided by the invention to weld to obtain, the weldment weld without
Crackle, intensity are high.
A kind of single V groove with root face welding method provided by the invention and weldment are carried out specifically below in conjunction with specific embodiment
It is bright.
Embodiment 1
Present embodiments provide a kind of single V groove with root face welding method and weldment.
A kind of single V groove with root face welding method, includes the following steps：
The surface of two pieces of parts to be welded with a thickness of 10mm is cleaned, the dirty of surface is rinsed out and is dried, then will
Part to be welded is placed in weld job position.Y-shaped groove is opened up in the position that part to be welded will weld, the root width of groove is
1mm, depth 1mm, the subtended angle of groove are 40 °.Groove pads in the side of the root of groove after opening up and sets ceramic substrate.
On pad after ceramic substrate, part to be welded is preheated to temperature and reaches 210 DEG C.Using melting pole gas shielded arc welding,
Welding process keeps the temperature part to be welded, so that part to be welded temperature is maintained at 210 degrees centigrades, soldering appliance is powered, and protects
It is 8 that shield gas, which is volume ratio,:1 argon gas and the gaseous mixture of carbon dioxide, gas flow 22L/min, electric current 310A, electric arc
Voltage is 37V, gage of wire 1mm, bonding speed 100mm/min.Multi-pass welding.
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 single V groove with root face welding method and weldment.
A kind of single V groove with root face welding method, includes the following steps：
The surface of two pieces of parts to be welded with a thickness of 26mm is cleaned, the dirty of surface is rinsed out and is dried, then will
Part to be welded is placed in weld job position.Y-shaped groove is opened up in the position that part to be welded will weld, the root width of groove is
3mm, depth 4mm, the subtended angle of groove are 60 °.Groove pads in the side of the root of groove after opening up and sets ceramic substrate.
On pad after ceramic substrate, part to be welded is preheated to 230 DEG C.Using melting pole gas shielded arc welding, welding process pair
Part to be welded is kept the temperature, so that part to be welded temperature is maintained at 230 degrees centigrades, soldering appliance is powered, and protective gas is body
Product is than being 9:1 argon gas and the gaseous mixture of carbon dioxide, gas flow 23L/min, electric current 320A, arc voltage 36V,
Gage of wire is 1.5mm, bonding speed 40mm/min.Multi-pass welding.
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 single V groove with root face welding method and weldment.
A kind of single V groove with root face welding method, includes the following steps：
The surface of two pieces of parts to be welded with a thickness of 14mm is cleaned, the dirty of surface is rinsed out and is dried, then will
Part to be welded is placed in weld job position.Y-shaped groove is opened up in the position that part to be welded will weld, the root width of groove is
2mm, depth 2mm, the subtended angle of groove are 50 °.Groove pads in the side of the root of groove after opening up and sets ceramic substrate.
On pad after ceramic substrate, part to be welded is preheated to 220 DEG C.Using melting pole gas shielded arc welding, welding process pair
Part to be welded is kept the temperature, so that part to be welded temperature is maintained at 220 degrees centigrades, soldering appliance is powered, and protective gas is body
Product is than being 9:1 argon gas and the gaseous mixture of carbon dioxide, gas flow 25L/min, electric current 330A, arc voltage 37V,
Gage of wire is 1.1mm, bonding speed 50mm/min.Multi-pass welding.
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
A kind of single V groove with root face welding method, includes the following steps：
The surface of two pieces of parts to be welded with a thickness of 18mm is cleaned, the dirty of surface is rinsed out and is dried, then will
Part to be welded is placed in weld job position.Y-shaped groove is opened up in the position that part to be welded will weld, the root width of groove is
2mm, depth 3mm, the subtended angle of groove are 45 °.Groove pads in the side of the root of groove after opening up and sets ceramic substrate.
On pad after ceramic substrate, part to be welded is preheated to 215 DEG C.Using melting pole gas shielded arc welding, welding process pair
Part to be welded is kept the temperature, so that part to be welded temperature is maintained at 215 degrees centigrades, soldering appliance is powered, and protective gas is body
Product is than being 8:1 argon gas and the gaseous mixture of carbon dioxide, gas flow 24L/min, electric current 325A, arc voltage 36V,
Gage of wire is 1.2mm, bonding speed 60mm/min.Multi-pass welding.
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
A kind of single V groove with root face welding method, includes the following steps：
The surface of two pieces of parts to be welded with a thickness of 22mm is cleaned, the dirty of surface is rinsed out and is dried, then will
Part to be welded is placed in weld job position.Y-shaped groove is opened up in the position that part to be welded will weld, the root width of groove is
2mm, depth 3mm, the subtended angle of groove are 48 °.Groove pads in the side of the root of groove after opening up and sets ceramic substrate.
On pad after ceramic substrate, part to be welded is preheated to 225 DEG C.Using melting pole gas shielded arc welding, welding process pair
Part to be welded is kept the temperature, so that part to be welded temperature is maintained at 225 degrees centigrades, soldering appliance is powered, and protective gas is body
Product is than being 9:1 argon gas and the gaseous mixture of carbon dioxide, gas flow 23L/min, electric current 320A, arc voltage are
36.5V, gage of wire 1.3mm, bonding speed 90mm/min.Multi-pass welding.
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.
Embodiment 6
A kind of single V groove with root face welding method, includes the following steps：
The surface of two pieces of parts to be welded with a thickness of 24mm is cleaned, the dirty of surface is rinsed out and is dried, then will
Part to be welded is placed in weld job position.Y-shaped groove is opened up in the position that part to be welded will weld, the root width of groove is
3mm, depth 2mm, the subtended angle of groove are 55 °.Groove pads in the side of the root of groove after opening up and sets ceramic substrate.
On pad after ceramic substrate, part to be welded is preheated to 218 DEG C.Using melting pole gas shielded arc welding, welding process pair
Part to be welded is kept the temperature, so that part to be welded temperature is maintained at 218 degrees centigrades, soldering appliance is powered, and protective gas is body
Product is than being 9:1 argon gas and the gaseous mixture of carbon dioxide, gas flow 24L/min, electric current 325A, arc voltage are
35.5V, gage of wire 4mm, bonding speed 70mm/min.Multi-pass welding.
First cool down to commissure after the completion of welding, rate of temperature fall is 350 DEG C/h, is carrying out temperature-fall period to commissure
In still weldment is kept the temperature, holding temperature be 218 DEG C, when commissure, temperature is down to 218 DEG C, cancel heat preservation, butt welding
Fitting integrally cools down, and rate of temperature fall is 75 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 kept the temperature after part to be welded preheating.
Comparative example 2
This comparative example is substantially the same manner as Example 3, the difference is that removing to weldment after the completion of part to be welded welding
Heat preservation, remove heat preservation after commissure with 300 DEG C/h cooling, and steel plate other positions with 60 DEG C/h cooling.
Comparative example 3
This comparative example is substantially the same manner as Example 2, the difference is that the cooling of commissure is fast after the completion of part to be welded welding
Rate is 550 DEG C/h.
Comparative example 4
This comparative example is substantially the same manner as Example 2, the difference is that weld seam is cooled to 230 and takes the photograph after the completion of part to be welded welding
After family name's 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 1-6 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 single V groove with root face welding method provided in this embodiment is good.Comparative example 1 and embodiment 3 are compared,
For comparative example 1 due to not kept the temperature, final steel plate obtained has 19 to think personally it with crackle, it can be seen that, weldment 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 part to be welded 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 10 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 7 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 single V groove with root face welding method provided in an embodiment of the present invention, be suitble to throat thickness be 10~26mm to
Weldment, since part to be welded is preheated to suitable temperature, after preheating part to be welded weld when carry out heat preservation operation, after the completion of welding after
It is continuous that heat preservation is carried out to weldment and is cooled down at weld seam with suitable rate of temperature fall, it is whole again after weld seam is cooled to holding temperature
With the cooling of suitable rate of temperature fall, so that the weldment flawless that welding obtains, intensity is high, and quality is good, and this method operates
Simply, human cost can effectively be saved.
Weldment provided in an embodiment of the present invention uses single V groove with root face 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 single V groove with root face welding method, which is characterized in that include the following steps：
Y-shaped groove is opened up in two pieces of part to be welded welds with a thickness of 10~26mm, root gap width is 1~3mm, depth
For 1~4mm, groove subtended angle is 40 °~60 °；
Two pieces of parts to be welded are preheated to 210~230 DEG C；
Part to be welded temperature is welded when reaching 210~230 DEG C, is kept the temperature in the welding process to part to be welded, so that part to be welded is protected
It holds at 210~230 DEG C；
Cool down after the completion of welding, the rate of temperature fall for controlling weld 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 weld temperature is down to 210~230 DEG C, control rate of temperature fall is 50~80 DEG C/h until weldment is cold
But to room temperature.
2. single V groove with root face welding method according to claim 1, which is characterized in that welding process is protected using consumable electrode gas
Shield arc welding is welded.
3. single V groove with root face welding method according to claim 2, 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.
4. single V groove with root face welding method according to claim 2, which is characterized in that shield gas flow rate is 22~25L/
min。
5. single V groove with root face welding method according to claim 2, which is characterized in that welding current is 310~330A, electric arc
Voltage is 35~37V.
6. single V groove with root face welding method according to claim 2, which is characterized in that gage of wire is 1~1.5mm.
7. single V groove with root face welding method according to claim 2, which is characterized in that welding process is with 40~100mm/min's
Bonding speed is welded.
8. single V groove with root face welding method according to claim 2, which is characterized in that open up before groove to part to be welded surface into
Row cleaning.
9. single V groove with root face welding method according to claim 1, which is characterized in that before two pieces of parts to be welded preheat, in close
The side pad of the root of the groove sets ceramic substrate.
10. a kind of weldment, which is characterized in that using such as the described in any item single V groove with root face welding method welding of claim 1-9
It obtains.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810809429.3A CN108907419A (en) | 2018-07-20 | 2018-07-20 | A kind of single V groove with root face welding method and weldment |
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| CN201810809429.3A CN108907419A (en) | 2018-07-20 | 2018-07-20 | A kind of single V groove with root face welding method and weldment |
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| CN (1) | CN108907419A (en) |
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Application publication date: 20181130 |