CN103817452A - Multi-layer and multi-pass welding-with-trailing-hammering method - Google Patents
Multi-layer and multi-pass welding-with-trailing-hammering method Download PDFInfo
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- CN103817452A CN103817452A CN201410100301.1A CN201410100301A CN103817452A CN 103817452 A CN103817452 A CN 103817452A CN 201410100301 A CN201410100301 A CN 201410100301A CN 103817452 A CN103817452 A CN 103817452A
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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
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Abstract
The invention relates to a welding-with-trailing-hammering method, in particular to a multi-layer and multi-pass welding-with-trailing-hammering method. The purpose is to solve the technical problem that heat affected zones of existing multi-layer and multi-pass welding are severe in grain coarsening, so that mechanical properties of a welded connector are greatly reduced. The method includes the steps that step1, the number of layers and the number of passes of multi-layer and multi-pass welding are determined; step2, the distance between a hammer and a weld gun is determined, a first-pass weld joint is welded through the welding-with-trailing-hammering method, and the hammer needs to be used for hammering all fusion lines and all the heat affected zones of the first-pass weld joint till the welding of the first-pass weld joint is finished; step3, the distance between the hammer and the weld gun is determined, the distance between the center of a weld joint to be welded and the center of an adjacent weld joint is determined, and the weld joints are welded through the welding-with-trailing-hammering method; step4, the step3 is repeatedly executed till a whole groove of a part to be welded is welded. The welding-with-trailing-hammering method is mainly applied to the field of multi-layer and multi-pass welding.
Description
Technical field
The present invention relates to a kind of with weldering hammering method.
Background technology
With welding hammering method as a kind of method of controlling welding residual stress, reducing welding deformation, can control thin-wall construction welding stress deformation and prevent fire check and the generation of cold crack with weldering, improve the tissue of welding point, improve its Static and dynamic mechanical property.The method is mainly by an impact head high-energy-rate hammering Seam and heat effected zone, thereby makes the position of residual tension that the object that plasticity extension reaches elimination welding residual stress, controls buckling deformation occur.Simply light with weldering hammering method equipment, weldquality is good, and cost is low, and efficiency is high, has application prospect very widely.
The heat affected area grain coarsening meeting of welding seriously reduces the mechanical property of welding point, and as intensity and fracture toughness etc., especially, in multi-layer multi-pass welding, the position that intensity and fracture toughness are minimum all appears at the coarse grain zone, heat affected area of heating repeatedly.Quantity research shows greatly, and refinement heat affected area crystal grain is one of important way increasing welding joint mechanical property.
Summary of the invention
The object of the invention is heat affected area grain coarsening in order to solve current multi-layer multi-pass welding serious, thus technical problem that can the serious mechanical property that reduces welding point, thereby provide a kind of multi-pass welding with weldering hammering method.
Carrying out according to the following steps with weldering hammering method of a kind of multi-pass welding of the present invention:
One, determine the number of plies of welding and the road number of welding;
Two, carry out the welding of first weld seam: according to the first weld-fusion line of first weld seam hammer hammering in welding process and all the regional temperature of heat affected areas be that the mother metal fusing point of 0.2 times～0.8 times is determined first weld seam distance d between hammer and welding gun in welding process
1, it is d that hammer is arranged on to distance after welding gun
1place, then adopts with weldering hammering method and carries out the welding of first weld seam with mounted welding gun and hammer, till hammer all melt runs of hammering first weld seam and whole heat affected area to welding of first weld seam always complete;
Three, carry out the welding of N road weld seam:
(1), N road weld seam has the situation of melt run: according to the N road weld-fusion line of N road weld seam hammer hammering in welding process and all the regional temperature of heat affected areas be that the mother metal fusing point of 0.2 times～0.8 times determines that weld seam distance between hammer and welding gun in welding process in N road is d
n, it is d that hammer is arranged on to distance after welding gun
nplace; The mother metal fusing point that is 0.5 times～0.8 times according to the peak temperature of N road weld seam melt run of all weld seams adjacent with N road weld seam in welding process is determined weld seam center, the N road distance at all weld seams center adjacent with N road weld seam respectively, then adopt with weldering hammering method and carry out the welding of N road weld seam with mounted welding gun and hammer, hammer always hammering N road weld seam all melt runs and till all the welding of N road, heat affected area to the weld seam completes;
(2), N road weld seam does not have the situation of melt run: in the time of welding N road weld seam without hammer hammering;
1. in the layer of weld seam place, N road, in the weld seam adjacent with N road weld seam, there is the situation of melt run: in the layer of weld seam place, N road, in all weld seams adjacent with N road weld seam, having the weld seam of melt run is weld seam I or weld seam I and II, the mother metal fusing point that is 0.5 times～0.8 times according to the peak temperature of N road weld seam melt run of weld seam I or weld seam I and II in welding process determine weld seam center, N road and weld seam I or respectively with the distance at weld seam I HeII center, then carry out the welding of N road weld seam with welding gun;
2. in the layer of weld seam place, N road, in the weld seam adjacent with N road weld seam, there is no the situation of melt run: the adjacent position of weld seam together with N road weld seam being welded on welding gun.
Four, till repeating step three to the whole welding for the treatment of weldment groove completes;
N described in step 3 is greater than 1 integer; When the welding of every layer of weld seam, all to first carry out the welding of both sides weld seam, then weld to centre successively from both sides, after every layer of welding completes, just can carry out the welding of lower one deck.
Melt run is the line of demarcation of weld metal and mother metal.
Principle of the present invention: the fundamental cause of welding heat affected zone grain coarsening is that field of welding temperature causes Jin Feng district crystal grain sharply to be grown up, can in first welding process, make heat affected area produce a large amount of plastic deformations with weldering hammering method, the temperature field of welding passage subsequently can make the heat affected area of distortion that recrystallization occurs.Parameter of the present invention mainly consider distance between hammer and welding gun and after together with weld seam and front together with distance between weld seam, hammer is excessively near apart from welding gun, can affect arc stability; Otherwise, being reduced by hammering position temperature, yield strength raises, and the amount of plastic deformation that hammering produces is too little; Hypotelorism between twice weld seam, the temperature field of rear one weld seam can make the position that plastic deformation has occurred complete rapidly recrystallization and grain growth process, and grain refining effect is not obvious; Otherwise rear one weld seam is lower in the temperature at hammering position, recrystallization can not be carried out completely.The present invention is based on this principle and take the crystal grain after suitable welding operation parameter reduction recrystallization sharply to grow up, can reach the object of refinement heat affected area crystal grain.
Advantage of the present invention:
1, method of the present invention will, with weldering hammering process application in multi-pass welding, can make heat affected area grain refinement 50%, have a significant effect for the mechanical property that improves welding point;
2, method equipment of the present invention is simply light, and cost is low, can, by regulating the two kinds of modes of distance between hammering power and hammer and welding gun to change adjusting amount of plastic deformation, reach optimization process parameter.
Accompanying drawing explanation
Fig. 1 adopts and the heat affected area microphoto of testing an identical mother metal and carrying out after the TIG welding method of multi-pass welding;
Fig. 2 is microphoto when mother metal stainless steel used does not weld in test one;
Fig. 3 is the microphoto with heat affected area after weldering hammering method that test one adopts multi-pass welding.
The specific embodiment
The specific embodiment one: the carrying out according to the following steps with weldering hammering method of a kind of multi-pass welding in present embodiment:
One, determine the number of plies of welding and the road number of welding;
Two, carry out the welding of first weld seam: according to the first weld-fusion line of first weld seam hammer hammering in welding process and all the regional temperature of heat affected areas be that the mother metal fusing point of 0.2 times～0.8 times is determined first weld seam distance d between hammer and welding gun in welding process
1, it is d that hammer is arranged on to distance after welding gun
1place, then adopts with weldering hammering method and carries out the welding of first weld seam with mounted welding gun and hammer, till hammer all melt runs of hammering first weld seam and whole heat affected area to welding of first weld seam always complete;
Three, carry out the welding of N road weld seam:
(1), N road weld seam has the situation of melt run: according to the N road weld-fusion line of N road weld seam hammer hammering in welding process and all the regional temperature of heat affected areas be that the mother metal fusing point of 0.2 times～0.8 times determines that weld seam distance between hammer and welding gun in welding process in N road is d
n, it is d that hammer is arranged on to distance after welding gun
nplace; The mother metal fusing point that is 0.5 times～0.8 times according to the peak temperature of N road weld seam melt run of all weld seams adjacent with N road weld seam in welding process is determined weld seam center, the N road distance at all weld seams center adjacent with N road weld seam respectively, then adopt with weldering hammering method and carry out the welding of N road weld seam with mounted welding gun and hammer, hammer always hammering N road weld seam all melt runs and till all the welding of N road, heat affected area to the weld seam completes;
(2), N road weld seam does not have the situation of melt run: in the time of welding N road weld seam without hammer hammering;
1. in the layer of weld seam place, N road, in the weld seam adjacent with N road weld seam, there is the situation of melt run: in the layer of weld seam place, N road, in all weld seams adjacent with N road weld seam, having the weld seam of melt run is weld seam I or weld seam I and II, the mother metal fusing point that is 0.5 times～0.8 times according to the peak temperature of N road weld seam melt run of weld seam I or weld seam I and II in welding process determine weld seam center, N road and weld seam I or respectively with the distance at weld seam I HeII center, then carry out the welding of N road weld seam with welding gun;
2. in the layer of weld seam place, N road, in the weld seam adjacent with N road weld seam, there is no the situation of melt run: the adjacent position of weld seam together with N road weld seam being welded on welding gun.
Four, till repeating step three to the whole welding for the treatment of weldment groove completes;
N described in step 3 is greater than 1 integer; When the welding of every layer of weld seam, all to first carry out the welding of both sides weld seam, then weld to centre successively from both sides, after every layer of welding completes, just can carry out the welding of lower one deck.
The advantage of present embodiment:
1, the method for present embodiment will, with weldering hammering process application in multi-pass welding, can make heat affected area grain refinement 50%, have a significant effect for the mechanical property that improves welding point;
2, the method equipment of present embodiment is simply light, and cost is low, can, by regulating the two kinds of modes of distance between hammering power and hammer and welding gun to change adjusting amount of plastic deformation, reach optimization process parameter.
The specific embodiment two: present embodiment is different from the specific embodiment one: the rated power of the hammer described in be in steps greater than 200W.Other are identical with the specific embodiment one.
The specific embodiment three: present embodiment is different from one of specific embodiment one or two: in step 2 according to the first weld-fusion line of first weld seam hammer hammering in welding process and all the regional temperature of heat affected areas be that the mother metal fusing point of 0.4 times～0.6 times is determined first weld seam distance d between hammer and welding gun in welding process
1, it is d that hammer is arranged on to distance after welding gun
1place.Other are identical with one of specific embodiment one or two.
The specific embodiment four: present embodiment is different from one of specific embodiment one to three: the mother metal fusing point that is 0.6 times～0.7 times according to the peak temperature of N road weld seam melt run of all weld seams adjacent with N road weld seam in welding process in step 3 (1) is determined weld seam center, the N road distance at all weld seams center adjacent with N road weld seam respectively.Other are identical with one of specific embodiment one to three.
The specific embodiment five: present embodiment is different from the specific embodiment four: the workpiece to be welded described in the step 1 described in step 1 is the mother metal of two identical materials.Other are identical with one of specific embodiment one to four.
Adopt following verification experimental verification effect of the present invention:
Test one: the carrying out according to the following steps with weldering hammering method of the multi-pass welding of this test:
One, according to the groove type of the size of workpiece to be welded and workpiece to be welded determine welding the number of plies be 1 layer and welding road number be 2 roads;
Two, carry out the welding of first weld seam: according to the first weld-fusion line of first weld seam hammer hammering in welding process and all the regional temperature of heat affected areas be that the mother metal fusing point of 0.6 times is determined first weld seam distance 35mm between hammer and welding gun in welding process, it is 35mm place that hammer is arranged on to distance after welding gun, then adopt with weldering hammering method and carry out the welding of first weld seam with mounted welding gun and hammer, hammer always hammering first weld seam all melt runs and till all heat affected area to the welding of first weld seam complete;
Three, carry out the welding of second weld seam:
In this test, second weld seam has melt run: according to the second weld-fusion line of second weld seam hammer hammering in welding process and all the regional temperature of heat affected areas be that the mother metal fusing point of 0.6 times determines that second weld seam distance between hammer and welding gun in welding process is 35mm, it is 35mm place that hammer is arranged on to distance after welding gun; The mother metal fusing point that is 0.6 times according to the peak temperature of second weld seam melt run of the first weld seam adjacent with second weld seam in welding process determines that the distance at the first weld seam center adjacent with second weld seam, second weld seam center is 12mm, then adopt with weldering hammering method and carry out the welding of second weld seam with mounted welding gun and hammer, hammer always hammering second weld seam all melt runs and till all heat affected area to the welding of second weld seam complete; The mother metal groove of this test is welding end completely also.
The rated power of the hammer described in this test is 200W.
Workpiece to be welded in this test described in step 1 is two blocks of stainless steels.
Fig. 1 adopts and the microphoto of the heat affected area after this tests the TIG welding method that identical mother metal carries out multi-pass welding, Fig. 2 is mother metal stainless steel used in this test microphoto while not welding, Fig. 3 is the microphoto with heat affected area after weldering hammering method that this test adopts multi-pass welding, as can be seen from the figure the average grain size of the heat affected area after the TIG of multi-pass welding welding is about 80 μ m, about the same while adopting the mother metal stainless steel with used in the heat affected area crystallite dimension after weldering hammering method and this test of the multi-pass welding of this test not weld, mean value is 40 μ m, thereby the crystal grain of the heat affected area after than other conventional methods welding of multi-pass welding with weldering hammering method of multi-pass welding that can find out this test is little by 50%, thereby can improve the mechanical property of welding point.
Material in Fig. 1, Fig. 2 and Fig. 3 is carried out to Vickers hardness analyzing and testing, when doing Vickers hardness test, the load of pressure head is 0.2kg, result shows that the Vickers hardness of the material in Fig. 1 is 25Hv0.2, the Vickers hardness of the material in Fig. 2 is 70Hv0.2, the Vickers hardness of the material in Fig. 3 is 70Hv0.2, because hardness is larger, crystal grain is less, so the crystal grain with welding the heat affected area after hammering method is welded than other conventional methods of multi-pass welding of the multi-pass welding of this test is little, thereby can improve the mechanical property of welding point.
Claims (5)
- Multi-pass welding with a weldering hammering method, it is characterized in that carrying out according to the following steps with weldering hammering method of multi-pass welding:One, determine the number of plies of welding and the road number of welding;Two, carry out the welding of first weld seam: according to the first weld-fusion line of first weld seam hammer hammering in welding process and all the regional temperature of heat affected areas be that the mother metal fusing point of 0.2 times～0.8 times is determined first weld seam distance d between hammer and welding gun in welding process 1, it is d that hammer is arranged on to distance after welding gun 1place, then adopts with weldering hammering method and carries out the welding of first weld seam with mounted welding gun and hammer, till hammer all melt runs of hammering first weld seam and whole heat affected area to welding of first weld seam always complete;Three, carry out the welding of N road weld seam:(1), N road weld seam has the situation of melt run: according to the N road weld-fusion line of N road weld seam hammer hammering in welding process and all the regional temperature of heat affected areas be that the mother metal fusing point of 0.2 times～0.8 times determines that weld seam distance between hammer and welding gun in welding process in N road is d n, it is d that hammer is arranged on to distance after welding gun nplace; The mother metal fusing point that is 0.5 times～0.8 times according to the peak temperature of N road weld seam melt run of all weld seams adjacent with N road weld seam in welding process is determined weld seam center, the N road distance at all weld seams center adjacent with N road weld seam respectively, then adopt with weldering hammering method and carry out the welding of N road weld seam with mounted welding gun and hammer, hammer always hammering N road weld seam all melt runs and till all the welding of N road, heat affected area to the weld seam completes;(2), N road weld seam does not have the situation of melt run: in the time of welding N road weld seam without hammer hammering;1. in the layer of weld seam place, N road, in the weld seam adjacent with N road weld seam, there is the situation of melt run: in the layer of weld seam place, N road, in all weld seams adjacent with N road weld seam, having the weld seam of melt run is weld seam I or weld seam I and II, the mother metal fusing point that is 0.5 times～0.8 times according to the peak temperature of N road weld seam melt run of weld seam I or weld seam I and II in welding process determine weld seam center, N road and weld seam I or respectively with the distance at weld seam I HeII center, then carry out the welding of N road weld seam with welding gun;2. in the layer of weld seam place, N road, in the weld seam adjacent with N road weld seam, there is no the situation of melt run: the adjacent position of weld seam together with N road weld seam being welded on welding gun.Four, till repeating step three to the whole welding for the treatment of weldment groove completes;N described in step 3 is greater than 1 integer; When the welding of every layer of weld seam, all to first carry out the welding of both sides weld seam, then weld to centre successively from both sides, after every layer of welding completes, just can carry out the welding of lower one deck.
- A kind of multi-pass welding according to claim 1 with weldering hammering method, it is characterized in that the rated power of the hammer described in be in steps greater than 200W.
- A kind of multi-pass welding according to claim 1 with weldering hammering method, it is characterized in that in step 2 according to the first weld-fusion line of first weld seam hammer hammering in welding process and all the regional temperature of heat affected areas be that the mother metal fusing point of 0.4 times～0.6 times is determined first weld seam distance d between hammer and welding gun in welding process 1, it is d that hammer is arranged on to distance after welding gun 1place.
- A kind of multi-pass welding according to claim 1 with weldering hammering method, it is characterized in that the mother metal fusing point that is 0.6 times～0.7 times according to the peak temperature of N road weld seam melt run of all weld seams adjacent with N road weld seam in welding process in step 3 (1) determines weld seam center, the N road distance at all weld seams center adjacent with N road weld seam respectively.
- A kind of multi-pass welding according to claim 1 with weldering hammering method, it is characterized in that the workpiece to be welded described in step 1 is the mother metal of two identical materials.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410100301.1A CN103817452B (en) | 2014-03-18 | 2014-03-18 | A kind of trailing peening method of multi-pass welding |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410100301.1A CN103817452B (en) | 2014-03-18 | 2014-03-18 | A kind of trailing peening method of multi-pass welding |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104722978A (en) * | 2015-03-30 | 2015-06-24 | 广东省工业技术研究院(广州有色金属研究院) | Portable welding deformation control equipment and deformation treatment method thereof |
| CN111822860A (en) * | 2020-06-10 | 2020-10-27 | 南京航空航天大学 | Method for accurately controlling double-laser-beam bilateral synchronous welding deformation of T-shaped structure |
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| CN2709083Y (en) * | 2004-07-19 | 2005-07-13 | 河北农业大学 | Parameter-adjustable welding-following hammering device |
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| CN101138817A (en) * | 2007-10-12 | 2008-03-12 | 哈尔滨工业大学 | Device for controlling welding stress deformation along with soldering impact, revolving and extrusion pressing |
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Cited By (2)
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| CN104722978A (en) * | 2015-03-30 | 2015-06-24 | 广东省工业技术研究院(广州有色金属研究院) | Portable welding deformation control equipment and deformation treatment method thereof |
| CN111822860A (en) * | 2020-06-10 | 2020-10-27 | 南京航空航天大学 | Method for accurately controlling double-laser-beam bilateral synchronous welding deformation of T-shaped structure |
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