CN107252972A - It is a kind of to reduce the laser filling wire welding technique of austenitic stainless steel weld joint solidification cracking - Google Patents
It is a kind of to reduce the laser filling wire welding technique of austenitic stainless steel weld joint solidification cracking Download PDFInfo
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- CN107252972A CN107252972A CN201710407796.6A CN201710407796A CN107252972A CN 107252972 A CN107252972 A CN 107252972A CN 201710407796 A CN201710407796 A CN 201710407796A CN 107252972 A CN107252972 A CN 107252972A
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- welding
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- filling wire
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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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by 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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
- B23K26/211—Bonding by welding with interposition of special material to facilitate connection of the parts
-
- 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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/32—Bonding taking account of the properties of the material involved
-
- 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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/60—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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
- B23K2103/05—Stainless steel
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
Abstract
The laser filling wire welding technique of austenitic stainless steel weld joint solidification cracking is reduced the invention discloses a kind of, belong to laser welding technology field, the means welded in shunting by being layered change the stress distribution of welding point, the constraint of Narrow sloping-glot Welded Joints during reduction laser filling wire welding, so as to reduce the formation rate of solidification cracking.Then coordinate individual layer two pass welding method to carry out the welding in Narrow sloping-glot using laser filling wire welding technique from fusion welding root face first using laser in the present invention, be layered, from bottom to top until completing cover welding.Identical welding material, restrain under the conditions of using the present invention welding method than common laser individual layer single track welding procedure when cracking frequency it is low.
Description
Technical field
It is specifically a kind of reduction austenitic stainless steel weld joint solidification the present invention relates to austenite stainless steel welding technology field
The laser filling wire welding technique of crackle.
Background technology
Austenitic stainless steel is a classification in stainless steel series, and it has good corrosion resistance, and it is in low temperature
And good mechanical property is respectively provided with the environment of normal temperature.Its comprehensive and good combination property so that it is each in each row
Obtained a wide range of applications in industry.Austenitic stainless steel has preferable weldability, and the Welding Problems being primarily present have welding to connect
Intercrystalline corrosion, stress corrosion cracking (SCC), matching of the overproofed ferrite content of weld metal and welding joint mechanical property of head etc., it is most
Common Welding Problems are the solidification cracking of welding point.
Laser welding is as high energy beam welding mode, with that heat input is concentrated, welding deformation is small, weld and HAZ is accurate etc. is excellent
Point, is broadly contemplated the welding applied to austenitic stainless steel.Laser filling wire welding is extension of the conventional laser from fusion welding, profit
With to slab design Narrow sloping-glot structure, and using layering fill silk welding manner come realize accumulation welding, it is possible to decrease thickness
Plate laser welding is depended on unduly to laser power, as a kind of thick plates method of high-quality, is increasingly taken seriously.But
The characteristics of using laser filling wire welding austenite stainless steel thick plate because of laser welding rapid solidification, in welding process Narrow sloping-glot
Constraint, the material properties of austenitic stainless steel, easily occur solidification cracking defect in welding process.
It is an object of the invention to provide a kind of laser silk filling for reducing austenitic stainless steel weld joint solidification cracking for the content of the invention
Welding procedure, to solve the solidification that prior art is easily occurred using weld seam during multilayer laser filling wire welding slab austenitic stainless steel
The problem of crack defect.
In order to achieve the above object, the technical solution adopted in the present invention is：
It is a kind of to reduce the laser filling wire welding technique of austenitic stainless steel weld joint solidification cracking, it is adaptable to slab austenitic stainless steel
Laser laminar filler wire welding process, it is especially suitable welding when with A solidification models formation full austenite weld seam along with extremely strong
Solidification cracking tendency situation, it is characterised in that：Comprise the following steps：
（1）, the welding position of U-shaped or double V-groove the austenitic stainless steel test plate (panel) with root face is cleaned with acetone after group pair
It is good, and fixed using fixture clamping；
（2）, root face layer using laser from fusion welding, after root face layer welding is completed, when the second layer is welded, laser filling wire welding work
Skill, coordinates individual layer two pass welding method；
（3）, the second layer welding after the completion of, continue point twice laser filling wire welding to complete the welding of third layer, layer below
By that analogy, from bottom to top, from left to right, until cover welding is completed.
A kind of laser filling wire welding technique of described reduction austenitic stainless steel weld joint solidification cracking, it is characterised in that：
By adjusting the technological parameter of laser welding, control per pass appearance of weld is good and single-pass welding width is the 3/5 of groove width
Left and right.
A kind of laser filling wire welding technique of described reduction austenitic stainless steel weld joint solidification cracking, it is characterised in that：
During the welding bead of welding left side welding position, focal position is arranged on left side welding bead center, the welding bead of welding right side welding position
When, focal position is arranged on right side welding bead center.
A kind of laser filling wire welding technique of described reduction austenitic stainless steel weld joint solidification cracking, it is characterised in that：
After the completion of the welding of per pass weld seam, one of welding position is polished down using angle grinder, and lower one of welding position is cleaned with acetone
Totally, to carry out down the welding of one of welding position.
A kind of laser filling wire welding technique of described reduction austenitic stainless steel weld joint solidification cracking, it is characterised in that：
Laser filling wire welding technique uses preposition wire feed, and wire feed angle is 30 ° -50 °.
The present invention changes the stress distribution of welding point by using the welding means to every layer of shunting, reduces laser and fills silk
The effect of contraction of Narrow sloping-glot Welded Joints during welding, so as to reduce the formation rate of solidification cracking.
Brief description of the drawings
Fig. 1 is the bevel shape and layer distribution schematic diagram of present example.
Embodiment
It is a kind of to reduce the laser filling wire welding technique of austenitic stainless steel weld joint solidification cracking, as shown in Figure 1, it is adaptable to thick
The laser laminar filler wire welding process of plate austenitic stainless steel, it is especially suitable that full austenite is formed with A solidification models in welding
Weld seam is inclined to situation along with extremely strong solidification cracking, comprises the following steps：
（1）, the welding position of U-shaped or double V-groove the austenitic stainless steel test plate (panel) with root face is cleaned with acetone after group pair
It is good, and fixed using fixture clamping；
（2）, root face layer using laser from fusion welding, after root face layer welding is completed, when the second layer is welded, laser filling wire welding work
Skill, coordinates individual layer two pass welding method；
（3）, the second layer welding after the completion of, continue point twice laser filling wire welding to complete the welding of third layer, layer below
By that analogy, from bottom to top, from left to right, until cover welding is completed.
Technological parameter of the invention by adjusting laser welding, control per pass appearance of weld is good and single-pass welding width exists
3/5 or so of groove width.
In the present invention, during the welding bead of welding left side welding position, focal position is arranged on left side welding bead center, welding is right
During the welding bead of side welding position, focal position is arranged on right side welding bead center.
In the present invention, after the completion of the welding of per pass weld seam, one of welding position is polished down using angle grinder, and with acetone under
One of welding position is cleaned up, to carry out down the welding of one of welding position.
In the present invention, laser filling wire welding technique uses preposition wire feed, and wire feed angle is 30 ° -50 °.
Specific embodiment：
Welding material is austenitic stainless steel 316 L N（300×150×20mm）, root face depth is 5mm, and root face width is 5mm,
Bevel angle is 6 °.Welding wire is BOHLER ER316LMn, and gage of wire is 1.2mm.
Welding heat source is optical fiber laser.Protective gas used is Ar, and shield gas flow rate is 15-20L/min.
Laser power used in root face is 3.6KW, and speed of welding is 1.0m/min, single track through welding 5mm depth.During landfilling area,
Laser power is 3.5KW, and speed of welding is 0.5m/min, and wire feed rate is 3.5m/min.
Postwelding carries out metallographic observation to weld seam end face, and the solidification cracking not found is present.
Claims (5)
1. a kind of reduce the laser filling wire welding technique of austenitic stainless steel weld joint solidification cracking, it is adaptable to slab austenite stainless
The laser laminar filler wire welding process of steel, it is especially suitable that full austenite weld seam is formed along with pole with A solidification models in welding
Strong solidification cracking tendency situation, it is characterised in that：Comprise the following steps：
（1）, the welding position of U-shaped or double V-groove the austenitic stainless steel test plate (panel) with root face is cleaned with acetone after group pair
It is good, and fixed using fixture clamping；
（2）, root face layer using laser from fusion welding, after root face layer welding is completed, when the second layer is welded, laser filling wire welding work
Skill, coordinates individual layer two pass welding method；
（3）, the second layer welding after the completion of, continue point twice laser filling wire welding to complete the welding of third layer, layer below
By that analogy, from bottom to top, from left to right, until cover welding is completed.
2. a kind of laser filling wire welding technique of reduction austenitic stainless steel weld joint solidification cracking according to claim 1,
It is characterized in that：By adjusting the technological parameter of laser welding, control per pass appearance of weld is good and single-pass welding width is on slope
3/5 or so of mouth width.
3. a kind of laser filling wire welding technique of reduction austenitic stainless steel weld joint solidification cracking according to claim 1,
It is characterized in that：During the welding bead of welding left side welding position, focal position is arranged on left side welding bead center, welding right side is welded
During the welding bead of position, focal position is arranged on right side welding bead center.
4. a kind of laser filling wire welding technique of reduction austenitic stainless steel weld joint solidification cracking according to claim 1,
It is characterized in that：After the completion of the welding of per pass weld seam, one of welding position is polished down using angle grinder, and welded together to lower with acetone
Connect position to clean up, to carry out down the welding of one of welding position.
5. a kind of laser filling wire welding technique of reduction austenitic stainless steel weld joint solidification cracking according to claim 1,
It is characterized in that：Laser filling wire welding technique uses preposition wire feed, and wire feed angle is 30 ° -50 °.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710407796.6A CN107252972A (en) | 2017-06-02 | 2017-06-02 | It is a kind of to reduce the laser filling wire welding technique of austenitic stainless steel weld joint solidification cracking |
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| CN201710407796.6A CN107252972A (en) | 2017-06-02 | 2017-06-02 | It is a kind of to reduce the laser filling wire welding technique of austenitic stainless steel weld joint solidification cracking |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107866634A (en) * | 2017-10-26 | 2018-04-03 | 无锡汉神电气股份有限公司 | A kind of austenitic stainless steel thin plate butt welding process |
| CN114101913A (en) * | 2021-12-08 | 2022-03-01 | 中国航发南方工业有限公司 | Repair welding method for deep groove of blade casting |
| CN114178698A (en) * | 2021-12-13 | 2022-03-15 | 湖南华菱涟源钢铁有限公司 | 9Ni steel narrow-gap laser filler wire welding method |
| CN114589424A (en) * | 2022-02-25 | 2022-06-07 | 安徽应流航源动力科技有限公司 | Welding repair method for high-silicon Monel alloy casting |
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| US4213025A (en) * | 1976-07-02 | 1980-07-15 | Bbc Brown, Boveri & Company, Limited | Apparatus for connecting metallic parts by means of arc fusion welding |
| CN103008895A (en) * | 2012-12-15 | 2013-04-03 | 华中科技大学 | Narrow gap multi-pass laser welding method for thick plate |
| CN103286449A (en) * | 2013-05-07 | 2013-09-11 | 中国科学院等离子体物理研究所 | Narrow gap laser hot-wire-filling welding process for 316LN thick plate |
| CN104668744A (en) * | 2015-02-12 | 2015-06-03 | 中国科学院等离子体物理研究所 | Automatic TIG (tungsten inert gas) welding process for thick-wall nuclear fusion vacuum chamber |
| CN106077951A (en) * | 2016-06-30 | 2016-11-09 | 上海交通大学 | Control the method that nickel-base alloy multilamellar wire filling laser welding beat-affected zone crack is formed |
-
2017
- 2017-06-02 CN CN201710407796.6A patent/CN107252972A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4213025A (en) * | 1976-07-02 | 1980-07-15 | Bbc Brown, Boveri & Company, Limited | Apparatus for connecting metallic parts by means of arc fusion welding |
| CN103008895A (en) * | 2012-12-15 | 2013-04-03 | 华中科技大学 | Narrow gap multi-pass laser welding method for thick plate |
| CN103286449A (en) * | 2013-05-07 | 2013-09-11 | 中国科学院等离子体物理研究所 | Narrow gap laser hot-wire-filling welding process for 316LN thick plate |
| CN104668744A (en) * | 2015-02-12 | 2015-06-03 | 中国科学院等离子体物理研究所 | Automatic TIG (tungsten inert gas) welding process for thick-wall nuclear fusion vacuum chamber |
| CN106077951A (en) * | 2016-06-30 | 2016-11-09 | 上海交通大学 | Control the method that nickel-base alloy multilamellar wire filling laser welding beat-affected zone crack is formed |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107866634A (en) * | 2017-10-26 | 2018-04-03 | 无锡汉神电气股份有限公司 | A kind of austenitic stainless steel thin plate butt welding process |
| CN114101913A (en) * | 2021-12-08 | 2022-03-01 | 中国航发南方工业有限公司 | Repair welding method for deep groove of blade casting |
| CN114101913B (en) * | 2021-12-08 | 2024-05-14 | 中国航发南方工业有限公司 | Repair welding method for deep groove of blade casting |
| CN114178698A (en) * | 2021-12-13 | 2022-03-15 | 湖南华菱涟源钢铁有限公司 | 9Ni steel narrow-gap laser filler wire welding method |
| CN114178698B (en) * | 2021-12-13 | 2024-04-09 | 湖南华菱涟源钢铁有限公司 | 9Ni steel narrow-gap laser filler wire welding method |
| CN114589424A (en) * | 2022-02-25 | 2022-06-07 | 安徽应流航源动力科技有限公司 | Welding repair method for high-silicon Monel alloy casting |
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Application publication date: 20171017 |
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