CN104209659B - The implementation method of vacuum during the welding of a kind of composite billet assembly - Google Patents
The implementation method of vacuum during the welding of a kind of composite billet assembly Download PDFInfo
- Publication number
- CN104209659B CN104209659B CN201310211969.9A CN201310211969A CN104209659B CN 104209659 B CN104209659 B CN 104209659B CN 201310211969 A CN201310211969 A CN 201310211969A CN 104209659 B CN104209659 B CN 104209659B
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- Prior art keywords
- vacuum
- welding
- slab
- boards base
- faying face
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- 238000003466 welding Methods 0.000 title claims abstract description 73
- 238000000034 method Methods 0.000 title claims abstract description 32
- 239000002131 composite material Substances 0.000 title claims abstract description 27
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 6
- 239000010959 steel Substances 0.000 claims abstract description 6
- 229910052742 iron Inorganic materials 0.000 claims abstract description 4
- 238000004140 cleaning Methods 0.000 claims description 8
- 238000001179 sorption measurement Methods 0.000 claims description 6
- 230000035900 sweating Effects 0.000 claims description 5
- 238000005096 rolling process Methods 0.000 abstract description 12
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 abstract description 4
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- 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
- B23K2101/18—Sheet panels
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
During the welding of a kind of composite billet assembly, the implementation method of vacuum, comprises the steps: 1) slave board, take two boards base, the iron scale of steel slab surface is cleaned out, and at the surrounding chamfering formation groove of slab faying face；2) early stage closes welding, welds two boards base groove, welds at least three layers；3) extracting vacuum, enters extracting vacuum between two boards base from the access aperture that weld seam is reserved with oil-sealed rotary pump, vacuum is drawn into below 10Pa, then uses molecular pump instead and continues extracting vacuum degree to below 0.01Pa；4) under vacuum condition, two step welding control.Present invention can ensure that the vacuum in the middle of two boards base after assembly, and the oxygen molecule adsorbed on slab faying face is relatively low, and then improve the composite quality of combination interface after composite rolling.
Description
Technical field
The present invention relates to thick composite plate manufacturing technology field, welded particularly to a kind of composite billet assembly
The implementation method of journey vacuum.
Background technology
The steel production enterprise carrying out sandwich rolling process production slab both at home and abroad mostly uses vacuum electronic
Bundle welding, puts into the slab after removing surface in vacuum chamber, under vacuum, to two pieces at once
The faying face surrounding of slab carries out welded closure, and maintains the vacuum state of two boards base intermediate surface.
The surrounding of slab is equally closed by traditional welding method, but two boards base combines
The more difficult maintenance of vacuum state in face.Owing to traditional welding method is an exposure in air carry out, welding
The heat input of process also can have heat effect to slab, and when slab has uniform temperature, original surface is clear
Fresh metal after reason also can accelerate the oxygen in air to be adsorbed the steel slab surface at faying face, in rolling
During can reduce the composite quality of faying face.
Summary of the invention
When it is an object of the invention to provide the welding of a kind of composite billet assembly, the implementation method of vacuum, permissible
After assembly welding terminates, it is achieved the vacuum at pretreatment composite billet slab faying face, and through clear
The oxygen that slab faying face after reason is adsorbed all dissipates away, it is ensured that after assembly, two boards base centre is true
The oxygen molecule adsorbed on sky, and slab faying face is relatively low, and then improves combination interface after composite rolling
Composite quality.
For reaching above-mentioned purpose, the technical scheme is that
During the welding of a kind of composite billet assembly, the implementation method of vacuum, comprises the steps:
1) slave board
Take two boards base, the iron scale of steel slab surface is cleaned out, and at slab faying face
Surrounding chamfering forms groove, then the cleaning face of two boards base is positioned over sky face-to-face
In gas；
2) early stage closes welding
Two boards base groove is welded, welds at least three layers, every layer thickness 3mm-10mm,
Ensure the air-tightness of surrounding weld seam；Period is a reserved access aperture in weld seam；
3) extracting vacuum
Enter extracting vacuum between two boards base with oil-sealed rotary pump from the access aperture that weld seam is reserved, will
Vacuum is drawn into below 10Pa, then uses molecular pump instead and continues extracting vacuum degree extremely
Below 0.01Pa；
4) under vacuum condition, two step welding control
When molecular pump works, i.e. vacuum is less than carrying out under 0.01Pa into two step welderings
Having connect residue welding job amount, first step welding job amount controls in residue welding job amount
40%-60%, welding process is continuous；After the first step has been welded, it is desirable to have 2-12 is little
Time time interval；Then carry out second step welding, complete to remain welding job amount, make weld seam
Being completely filled with, welding process terminates, and is closed by vacuum passage, keeps the vacuum between slab
State.
Further, step 2) early stage closes in welding process, a pre-buried conduit in two boards base groove,
Form the access aperture accessed for vacuum pump.
Also, step 4) vacuum is monitored by welding process, during first step welding, vacuum
Undulate quantity is 20%～80%, it was demonstrated that during welding, slab faying face surface adsorption gas heats at sweating heat
Time more active, under vacuum accelerate dissipation；During second step welding, fluctuation vacuum amount is less than
10%, it was demonstrated that when the first step is welded, slab faying face surface adsorption gas has dissipated and has exhausted, weldering
Connect.
Sandwich rolling process produces slab to the demand of vacuum state between two boards base:
(1) vacuum.Sandwich rolling process produce slab, need realize and keep two pieces of composite plates it
Between vacuum state, any residual gas is likely to cause complex fail.Therefore, in complex group
During base, it is ensured that the vacuum between two boards base is less than 0.1Pa.
(2) the absorption oxygen molecule dissipation on slab faying face surface.Slab arrives after removing surface
Welding procedure completes, and surface after cleaning exposes in atmosphere, can adsorb certain air, need by
The dissipation as far as possible of the air of absorption.
The present invention considers above-mentioned two demand, and the vacuum realization with existing conventional assembly welding process has relatively
Big improvement.
Existing conventional assembly is welded with two kinds of methods, and a kind of is to be set by expensive vacuum electron beam welding
Standby, slab is placed in vacuum chamber, when vacuum chamber reaches vacuum level requirements, starts slab is carried out
Surrounding welding is until welding terminates.The equipment investment of the method costly, and needs whole vacuum
Room carries out extracting vacuum, and the time of evacuation is longer.
Second method carries out assembly in atmosphere, then carries out surrounding welding, completes in welding job
After again from reserved access device extracting vacuum.The method welding whole during, slab faying face
Always with air contact state, sweating heat has certain heat effect, longer welding to slab
During, during standby base, the slab faying face through cleaning produces certain oxidation.Implementing composite rolling
After, slab faying face can produce some stains.Owing to these stains are combined with impact to slab, should
Method is denied the most always.
The present invention takes assembly in air, it is not necessary to expensive vacuum electronic beam device.First implement to close
Welding, its welding job amount is less, and the time is the shortest, can avoid the slab faying face oxygen through cleaning
Change problem.Then implement extracting vacuum, owing to the space of extracting vacuum only limits at two boards base faying face
Between small space, the efficiency of extracting vacuum is the highest.Butt welded seam again after vacuum reaches 0.01Pa
The two step welding implemented under vacuum condition control, and have both avoided welding oxidation, make use of again sweating heat pair
The heat effect of slab, promotes the dissipation of slab cleaning rear surface absorption air molecule.
Beneficial effects of the present invention:
By means of the invention it is also possible to after assembly welding terminates, it is achieved pretreatment composite billet slab
Vacuum at faying face, and the oxygen that adsorbed of slab faying face after cleaning all dissipates away,
The vacuum that after guarantee assembly, two boards base is middle, and the oxygen molecule adsorbed on slab faying face is relatively low,
And then the composite quality of combination interface after raising composite rolling.
Accompanying drawing explanation
Fig. 1 is the groove schematic diagram in the embodiment of the present invention.
Fig. 2 is faying face metallographic after the rolling of existing composite billet.
Fig. 3 be use the present invention composite billet rolling after faying face metallographic.
Detailed description of the invention
Seeing Fig. 1, the implementation method of vacuum when a kind of composite billet assembly of the present invention welds, including such as
Lower step:
1) slave board
Take two boards base 1,2, the iron scale of steel slab surface is cleaned out, and combine at slab
The surrounding chamfering of face A forms groove 3, then by two boards base 1, the cleaning face of 2
It is positioned over face-to-face in air；
2) early stage closes welding
Two boards base 1,2 groove 3 is welded, welds at least three layers, every layer thickness
3mm-10mm, it is ensured that the air-tightness of surrounding weld seam；Period is a reserved access aperture in weld seam；
3) extracting vacuum
Enter extracting vacuum between two boards base with oil-sealed rotary pump from the access aperture that weld seam is reserved, will
Vacuum is drawn into below 10Pa, then uses molecular pump instead and continues extracting vacuum degree extremely
Below 0.01Pa；
4) under vacuum condition, two step welding control
When molecular pump works, i.e. vacuum is less than carrying out under 0.01Pa into two step welderings
Having connect residue welding job amount, first step welding job amount controls in residue welding job amount
40%-60%, welding process is continuous；After the first step has been welded, it is desirable to have 2-12 is little
Time time interval；Then carry out second step welding, complete to remain welding job amount, make weld seam
Being completely filled with, welding process terminates, and is closed by vacuum passage, keeps the vacuum between slab
State.
Further, step 2) early stage closes in welding process, pre-buried in two boards base 1,2 groove 3
One conduit 4, forms the access aperture accessed for vacuum pump.
Also, step 4) vacuum is monitored by welding process, during first step welding, vacuum
Undulate quantity is 20%～80%, it was demonstrated that during welding, slab faying face surface adsorption gas heats at sweating heat
Time more active, under vacuum accelerate dissipation；During second step welding, fluctuation vacuum amount is less than
10%, it was demonstrated that when the first step is welded, slab faying face surface adsorption gas has dissipated and has exhausted, weldering
Connect.
It is heated to 1200 DEG C in composite billet after welding is positioned over heating furnace, goes out after being incubated 3 hours
Stove, carries out rolling, cooling down.It is sampled model analyzing, as in figure 2 it is shown, for this is not carried out
Faying face after the rolling of bright composite billet, has a lot of point, and the air molecule for the inside residual causes.As
Shown in Fig. 3, for implementing the faying face after composite billet of the present invention rolls, arrangement does not occurs on faying face
Neat point.
Claims (3)
1. an implementation method for vacuum during welding of composite billet assembly, comprises the steps:
1) slave board
Take two boards base, the iron scale of steel slab surface is cleaned out, and at slab faying face
Surrounding chamfering forms groove, then the cleaning face of two boards base is positioned over sky face-to-face
In gas；
2) early stage closes welding
Two boards base groove is welded, welds at least three layers, every layer thickness 3mm-10mm,
Ensure the air-tightness of surrounding weld seam；Period is a reserved access aperture in weld seam；
3) extracting vacuum
Enter extracting vacuum between two boards base with oil-sealed rotary pump from the access aperture that weld seam is reserved, will
Vacuum is drawn into below 10Pa, then uses molecular pump instead and continues extracting vacuum degree extremely
Below 0.01Pa；
4) under vacuum condition, two step welding control
When molecular pump works, i.e. vacuum is less than carrying out under 0.01Pa into two step welderings
Having connect residue welding job amount, first step welding job amount controls in residue welding job amount
40%-60%, welding process is continuous；After the first step has been welded, it is desirable to have 2-12 is little
Time time interval；Then carry out second step welding, complete to remain welding job amount, make weld seam
Being completely filled with, access aperture closed, welding process terminates, and keeps the vacuum shape between slab
State.
2. the implementation method of vacuum during composite billet assembly welding as claimed in claim 1, is characterized in that,
Step 2) early stage closes in welding process, a pre-buried conduit in two boards base groove, formed for true
The access aperture that empty pump accesses.
3. the implementation method of vacuum during composite billet assembly welding as claimed in claim 1, is characterized in that,
Vacuum is monitored by step 4) welding process, during first step welding, fluctuation vacuum amount
20%～80%, it was demonstrated that during welding, slab faying face surface adsorption gas heats time ratio at sweating heat
More active, accelerate dissipation under vacuum；During second step welding, fluctuation vacuum amount is less than
10%, it was demonstrated that when the first step is welded, slab faying face surface adsorption gas has dissipated and has exhausted,
Welding completes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310211969.9A CN104209659B (en) | 2013-05-31 | 2013-05-31 | The implementation method of vacuum during the welding of a kind of composite billet assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310211969.9A CN104209659B (en) | 2013-05-31 | 2013-05-31 | The implementation method of vacuum during the welding of a kind of composite billet assembly |
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| CN104209659A CN104209659A (en) | 2014-12-17 |
| CN104209659B true CN104209659B (en) | 2016-08-24 |
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Families Citing this family (4)
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| CN107175462A (en) * | 2017-05-03 | 2017-09-19 | 河钢股份有限公司邯郸分公司 | A kind of composite plate blanks preparation method for rolling composite plate |
| CN110819770B (en) * | 2019-10-28 | 2021-08-20 | 鞍钢股份有限公司 | A kind of steel plate for large thickness hydrogenation reactor shell and its manufacturing method |
| CN112475556A (en) * | 2020-11-11 | 2021-03-12 | 鞍钢股份有限公司 | Composite blank assembly welding method adopting narrow-gap MAG transverse welding method |
| CN112548499B (en) * | 2020-12-05 | 2022-11-18 | 安徽宝恒新材料科技有限公司 | Processing method of three-layer composite steel plate |
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