CN106041268A - Layered ultrasonic impact treatment method capable of optimizing structure and performance of weld - Google Patents
Layered ultrasonic impact treatment method capable of optimizing structure and performance of weld Download PDFInfo
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- CN106041268A CN106041268A CN201610490184.3A CN201610490184A CN106041268A CN 106041268 A CN106041268 A CN 106041268A CN 201610490184 A CN201610490184 A CN 201610490184A CN 106041268 A CN106041268 A CN 106041268A
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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
-
- 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
-
- 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
- B23K9/32—Accessories
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
The invention discloses a layered ultrasonic impact treatment method capable of optimizing the structure and the performance of a weld. The layered ultrasonic impact treatment method comprises the following steps: completing preparations before welding at first, wherein a base material in a groove of the weld with ethyl alcohol is cleaned, adherent greasy dirt caused by machining is removed, and then the cleaned base material is dried by an air blower; welding the first layer of welding bead, and removing welding slag by using a steel wire brush after the first layer of welding bead is welded; when the first layer of welding bead is cooled to range between 500 DEG C or below and the room temperature, performing ultrasonic impact on the first layer of welding bead by using ultrasonic impact equipment; after the ultrasonic impact on the first layer of welding bead is finished, removing slag inclusion caused by the ultrasonic impact process by using the steel wire brush; and then repeating the above steps until the whole weld is welded. According to the layered ultrasonic impact treatment method disclosed by the invention, the weld is subjected to layered ultrasonic impact in a multi-layer multi-welding-bead welding process, so that the internal mechanical properties of the weld can be optimized.
Description
Technical field
The present invention relates to optimize seam organization and the layering ultrasonic implement treatment method of performance, belong to welding field.
Background technology
Seam organization generally grows to Weld pipe mill with the form of column crystal under soldering conditions, when hot weld seam input is excessive
Easily form thick column crystal.Especially in multi-pass welding welding process, weld seam experience multiple welding Thermal Cycling, holds
It is easily caused weld seam interior tissue to deteriorate and mechanical properties decrease.
Ultrasonic impact is a kind of ideal after welding treatment method, and the principle of postwelding ultrasonic impact is high by striker pin
Speed is clashed into welding point surface and is brought it about plastic deformation, and forms certain thickness residual compressive stress layer.The method operation side
Just, impact effect is notable, it is possible to for multiple joint form.At present about the research of the different impact process of welding line ultrasonic impact
Its main process a lot of is had to have:
1) postwelding weld seam toe of weld position ultrasonic impact.The method is that postwelding butt welded seam toe of weld position carries out ultrasonic impact, logical
Cross the excessive radius of increase toe of weld to drop stress concentration, improve the fatigue behaviour of joint.But this process is primarily directed to
Improving face of weld form to improve joint performance, the method does not mention the optimization of butt welded seam interior tissue and mechanical property.
2) postwelding face of weld ultrasonic impact.The method mainly produces plastic deformation by ultrasonic impact at face of weld
With residual compressive stress layer.But the plastic deformation layer that the method produces remains a need for polishing to reduce roughness, the internal group of butt welded seam
The refinement knitted also only has about 100 μm, and the degree of depth is very limited.
3) with weldering ultrasonic impact.The method is to surpass the back of weld of rear, molten bath certain distance in welding process
Acoustic shock, the method cannot change seam organization form, and the method is higher to equipment requirements, needs special device, existing
Field construction is relatively difficult.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the present invention provides a kind of and optimizes seam organization and property
The layering ultrasonic implement treatment method of energy, in multi-pass welding welding process, butt welded seam carries out being layered ultrasonic impact, optimizes weldering
Mechanical property within Feng.
Technical scheme: for solving above-mentioned technical problem, the layering that the present invention a kind of optimizes seam organization and performance is ultrasonic
Impact processing method, comprises the following steps:
(1), prepare before welding: the preparation before first welding, the mother metal in butt welded seam groove uses ethanol to enter
Row cleans, and removes the greasy dirt of machining attachment, dries up with hair-dryer after cleaning；
(2), prepare before layering ultrasonic impact: carry out the welding of the 1st layer of welding bead, after having welded the 1st layer of welding bead, use iron wire
Brush away except welding slag；
(3), layering ultrasonic impact: be cooled to 500 degree to use ultrasonic impact equipment pair during down to room temperature until the 1st layer of welding bead
1st layer of welding bead carries out ultrasonic impact；
(4), after layering ultrasonic impact, face of weld processes: after the complete 1st layer of welding bead of ultrasonic impact, use iron wire brush to remove super
The slag inclusion that acoustic shock process causes；
(5), step (2)-(4) are repeated, until complete weld seam of welding.
As preferably, in described step (3), ultrasonic impact frequency is 20KHz, and ultrasonic impact intensity is 10s/cm2, described
The hemispherical that impact syringe needle is diameter 4mm of ultrasonic impact device, the hardness of impact syringe needle is not less than 940HV, striker pin number
It it is 4～6.
As preferably, in described step (3), ultrasonic impact is carried out along welding direction, and impact coverage rate is 100%
200%.
In the present invention, mainly by ultrasonic impact device, described ultrasonic punching and device mainly include ultrasound wave frequency
Rate power supply, the ultrasonic impact gun of internal placed transducer and striker pin, be changed into 20KHz's by supersonic generator by power current
Supersonic frequency alternating current, in order to encourage the transducer of sound system, transducer converts electrical energy into the mechanical vibration of same frequency, punching
Hit weld seam.After ultrasonic impact, layer surface produces the strengthening layer of certain depth, and this strengthening layer crystal grain is refined, and exists certain
The layer of residual compressive stress of the degree of depth.Welding on subsequent passes layer after ultrasonic impact, the existence of ultrasonic impact layer changes
Solidification and crystallization process of subsequent passes, makes seam organization change, and mechanical property is optimized.This invention is applicable to many
The melting welding process of the form of kind.
Beneficial effect: a kind of layering ultrasonic implement treatment method optimizing melting seam organization and performance, has following
Advantage:
1, the present invention can refine weld seam internal grain, makes the column crystal of average area 0.05mm2 weld seam columnar zone, changes
It is 0.0006mm for average area2Equiax crystal；
2, the present invention can optimize multi-Layer Welding of Thick Plates weld seam interior tissue, makes seam organization be changed by thick column crystal
For tiny equiax crystal, optimize the degree of depth and can reach whole throat depth；
3, the present invention optimizes the mechanical property within weld seam, make weld impingement performance improve 5% and more than.
Accompanying drawing explanation
Fig. 1 is that embodiment of the present invention butt welded seam carries out being layered ultrasonic impact schematic diagram, wherein (a) backing welding welding signal
Figure, (b) carries out ultrasonic impact schematic diagram to ground floor layer, proceeds to weld schematic diagram after (c) ultrasonic impact, and (d) is to the
Two layers of weld seam carry out ultrasonic impact schematic diagram, and the cap weld of (e) butt welded seam carries out ultrasonic impact schematic diagram；
Fig. 2 is the columanar structure being grown in not on ultrasonic impact；
Fig. 3 is the equiaxed grain structure being grown on ultrasonic impact layer.
Detailed description of the invention
Below in conjunction with the accompanying drawings embodiments of the present invention are further described:
The present embodiment carries out the carbon dioxide gas protection welding of two test specimens of A, B, and test specimen A is without ultrasonic impact weldment, examination
Part B is the weldment using layering ultrasonic impact method to process.Test specimen A and test specimen B is 55mm thickness Q345 steel plate, weld groove angle
Spending 60 degree, welding method is carbon dioxide gas arc welding, and test specimen A and B welds under same welding parameter.Test specimen A makees
For contrast test, welding procedure and parameter, all ultrasonic with layering to rush impact test B consistent.As it is shown in figure 1, these technique concrete steps
As follows:
The first step: the preparation before welding: use ethanol to carry out clearly the mother metal in test specimen A and test specimen B weld groove
Wash, remove the greasy dirt of machining attachment, dry up with hair-dryer after cleaning；
Second step: welding job: select rational welding condition (weldingvoltage, welding current, protection throughput)
Carry out test specimen A and the welding of test specimen B ground floor welding bead；
3rd: layering ultrasonic impact before preparation: layering ultrasonic impact test piece B welded the 1st layer of welding bead it
After, remove the welding slag of face of weld with iron wire brush, treat that weld seam is cooled to 500 degree with down to room temperature；
4th step: layering ultrasonic impact implementing process: use the 1st layer of weldering to test specimen B of the JSKD-D type ultrasonic impact equipment
Road carries out ultrasonic impact uniformly, and impact gun weight is 5Kg, a diameter of 4mm of striker pin, 4 striker pin, and ultrasonic impact intensity is
10s/cm2, supersonic frequency 20KHz, ultrasonic impact coverage rate is 200%, and impact gun is perpendicular to welding bead, and in impact gun deadweight
Under effect, (5Kg) carries out ultrasonic impact, select high hard alloy as impact syringe needle (hardness is not less than 900HV), to obtain punching
Hitting the preferable shock ply of effect, during ultrasonic impact, striker pin to be basically perpendicular to be impacted layer surface, slightly exerts pressure,
But substantially under Gravitative Loads, carry out ultrasonic impact；
5th step: ground floor welding bead ultrasonic impact welds the 2nd layer of welding bead after terminating, with same ultrasonic impact parameter to the
2 layers of weld seam carry out ultrasonic impact.Repeat " welding ultrasonic impact welding " this process, until weld seam fills up, complete whole
The layering ultrasonic impact process of weld seam.
Effective evaluation: metallographic phase sample will be cut without ultrasonic impact weld seam A and layering ultrasonic impact weld seam B, and in A, B weld seam
Portion's same position is respectively cut makes Charpy V-notch impact specimen, carries out 0 degree of impact test.By contrast without ultrasonic impact
Weld seam A and layering ultrasonic impact weld seam B interior microscopic tissue and impact flexibility, analyze the superiority of present invention process.
As in figure 2 it is shown, be thick column crystal 1 form without ultrasonic impact weld seam A interior tissue, layered ultrasonic impact
After, it is grown in welding bead interior tissue on shock ply and is changed into tiny equiax crystal 2 form, as shown in Figure 3.As shown in table 1, weld seam
After layered ultrasonic impact, after the layered ultrasonic impact of impact absorbing energy of weld seam B, improve 13.4%.
Table 1
The above is only the preferred embodiment of the present invention, it should be pointed out that: for the ordinary skill people of the art
For Yuan, under the premise without departing from the principles of the invention, it is also possible to make some improvements and modifications, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (3)
1. the layering ultrasonic implement treatment method optimizing arc welding seam organization and performance, it is characterised in that include following
Step:
(1), first weld before preparation, mother metal in butt welded seam cut uses ethanol to be carried out, removes machinery
The greasy dirt of processing attachment, dries up with hair-dryer after cleaning；
(2), carry out the welding of the 1st layer of welding bead, after having welded the 1st layer of welding bead, use iron wire brush to remove welding slag；
(3), it is cooled to 500 degree to use ultrasonic impact equipment to carry out ultrasonic to the 1st layer of welding bead during down to room temperature until the 1st layer of welding bead
Impact；
(4), after the complete 1st layer of welding bead of ultrasonic impact, iron wire brush is used to remove the slag inclusion that ultrasonic impact process causes；
(5), step (2)-(4) are repeated, until complete weld seam of welding.
The layering ultrasonic implement treatment method of optimization seam organization the most according to claim 1 and performance, it is characterised in that:
In described step (3), ultrasonic impact frequency is 20KHz, and ultrasonic impact intensity is 10s/cm2, the impact of described ultrasonic impact device
Syringe needle is hemispherical, a diameter of 4mm, and impact syringe needle hardness is not less than 900HV, and striker pin number is 4～6.
The layering ultrasonic implement treatment method of optimization seam organization the most according to claim 1 and performance, it is characterised in that:
In described step (3), ultrasonic impact process is carried out along welding direction, and impact coverage rate is 100% 200%.
Priority Applications (1)
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| CN201610490184.3A CN106041268A (en) | 2016-06-28 | 2016-06-28 | Layered ultrasonic impact treatment method capable of optimizing structure and performance of weld |
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| CN201610490184.3A CN106041268A (en) | 2016-06-28 | 2016-06-28 | Layered ultrasonic impact treatment method capable of optimizing structure and performance of weld |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109014551A (en) * | 2017-06-12 | 2018-12-18 | 天津大学 | A method of reducing aluminium alloy CMT plumb joint stomata |
| CN111037144A (en) * | 2019-11-28 | 2020-04-21 | 新兴际华集团有限公司 | Method for regulating and controlling weld joint structure performance and residual stress based on mechanical vibration |
| CN111041189A (en) * | 2019-12-17 | 2020-04-21 | 中国航发动力股份有限公司 | Impact pin and method for eliminating weld stress by using same for ultrasonic impact |
| CN111504530A (en) * | 2020-04-02 | 2020-08-07 | 江苏科技大学 | Method for rapidly realizing regulation and control of stress of cladding layer without damage based on ultrasonic technology |
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| US6171415B1 (en) * | 1998-09-03 | 2001-01-09 | Uit, Llc | Ultrasonic impact methods for treatment of welded structures |
| US20060016858A1 (en) * | 1998-09-03 | 2006-01-26 | U.I.T., Llc | Method of improving quality and reliability of welded rail joint properties by ultrasonic impact treatment |
| CN101293303A (en) * | 2008-06-13 | 2008-10-29 | 中国船舶重工集团公司第七二五研究所 | TIG automatic welding technique for titanium alloy thick plate narrow interstice |
| CN101492759A (en) * | 2009-03-03 | 2009-07-29 | 南京工业大学 | Ultrasonic impact treatment process for resisting stress corrosion cracking |
| CN104289831A (en) * | 2014-08-19 | 2015-01-21 | 台山核电合营有限公司 | Welding with trailing peening stress eliminating method of large nuclear power steel structure |
| CN104726687A (en) * | 2014-10-15 | 2015-06-24 | 哈尔滨工业大学（威海） | Technique for reducing or eliminating welding deformation and residual stress by trailing welding ultrasonic peening |
| CN104827164A (en) * | 2014-02-11 | 2015-08-12 | 南京润邦金属复合材料有限公司 | Large-area large-thickness TU2 copper/steel explosion composite material and defect repairing method |
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| US20060016858A1 (en) * | 1998-09-03 | 2006-01-26 | U.I.T., Llc | Method of improving quality and reliability of welded rail joint properties by ultrasonic impact treatment |
| CN101293303A (en) * | 2008-06-13 | 2008-10-29 | 中国船舶重工集团公司第七二五研究所 | TIG automatic welding technique for titanium alloy thick plate narrow interstice |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109014551A (en) * | 2017-06-12 | 2018-12-18 | 天津大学 | A method of reducing aluminium alloy CMT plumb joint stomata |
| CN111037144A (en) * | 2019-11-28 | 2020-04-21 | 新兴际华集团有限公司 | Method for regulating and controlling weld joint structure performance and residual stress based on mechanical vibration |
| CN111037144B (en) * | 2019-11-28 | 2022-09-06 | 新兴际华集团有限公司 | Method for regulating and controlling weld joint structure performance and residual stress based on mechanical vibration |
| CN111041189A (en) * | 2019-12-17 | 2020-04-21 | 中国航发动力股份有限公司 | Impact pin and method for eliminating weld stress by using same for ultrasonic impact |
| CN111504530A (en) * | 2020-04-02 | 2020-08-07 | 江苏科技大学 | Method for rapidly realizing regulation and control of stress of cladding layer without damage based on ultrasonic technology |
| CN111504530B (en) * | 2020-04-02 | 2021-10-15 | 江苏科技大学 | Method for rapidly realizing regulation and control of stress of cladding layer without damage based on ultrasonic technology |
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Application publication date: 20161026 |
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