CN110726734A - Welding wire crack resistance experiment method - Google Patents

Welding wire crack resistance experiment method Download PDF

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Publication number
CN110726734A
CN110726734A CN201911038483.3A CN201911038483A CN110726734A CN 110726734 A CN110726734 A CN 110726734A CN 201911038483 A CN201911038483 A CN 201911038483A CN 110726734 A CN110726734 A CN 110726734A
Authority
CN
China
Prior art keywords
welding
crack resistance
steel plate
welding wire
steel plates
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201911038483.3A
Other languages
Chinese (zh)
Inventor
丁正祥
赵凯
罗汉清
夏文亚
陈红亮
余庆
何源
李武凯
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CSSC Huangpu Wenchong Shipbuilding Co Ltd
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CSSC Huangpu Wenchong Shipbuilding Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by CSSC Huangpu Wenchong Shipbuilding Co Ltd filed Critical CSSC Huangpu Wenchong Shipbuilding Co Ltd
Priority to CN201911038483.3A priority Critical patent/CN110726734A/en
Publication of CN110726734A publication Critical patent/CN110726734A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/91—Investigating the presence of flaws or contamination using penetration of dyes, e.g. fluorescent ink
    • 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
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/02—Iron or ferrous alloys
    • B23K2103/04—Steel or steel alloys

Abstract

The invention discloses a welding wire crack resistance experiment method, which comprises the following steps: preparing two steel plates, and opening a 45-degree groove on one side of the long sides of the two steel plates; splicing the long sides of the grooves of the two steel plates together, and sticking ceramic liners on the reverse sides of the grooves of the two steel plates; by CO2Performing backing welding on the horizontal ceramic liner butt weld seam by gas shielded welding; after welding, performing dye penetrant inspection on the test steel plate, and checking to obtain the cracking condition of the backing weld; according to the invention, the cracking condition of the backing weld is obtained by welding and performing dye penetrant inspection on the test steel plate, so that the crack of the weld is detected, the unqualified weld caused by the generation of hot crack of the weld is avoided, and the welding quality is ensured.

Description

Welding wire crack resistance experiment method
Technical Field
The invention relates to the technical field of ship welding, in particular to a welding wire crack resistance experiment method.
Background
With the continuous progress of ship construction technology, the steel plates for ships are gradually changed from low-carbon steel to low-alloy high-strength steel. The low-alloy high-strength steel has poor weldability relative to low-carbon steel, and welding cracks are easy to generate. Particularly, when the low-alloy high-strength steel is welded by adopting a carbon dioxide gas shielded flux cored wire liner, if the welding material has quality problems or is not properly matched, the welding seam is easily cracked, and the welding seam is unqualified.
Disclosure of Invention
The invention provides a welding wire crack resistance experiment method, which is used for detecting cracks of a welding seam by welding a test steel plate and performing dye penetrant inspection to check the cracking condition of a bottoming welding seam, so that the cracks of the welding seam are detected, unqualified welding seams caused by the generation of hot cracks of the welding seam are avoided, and the welding quality is ensured.
In order to solve the technical problem, an embodiment of the invention provides a welding wire crack resistance experiment method, which comprises the following steps:
preparing two steel plates, and opening a 45-degree groove on one side of the long sides of the two steel plates;
splicing the long sides of the grooves of the two steel plates together, and sticking ceramic liners on the reverse sides of the grooves of the two steel plates;
performing backing welding on the horizontal ceramic liner butt weld by CO2 gas shielded welding;
and after welding, performing dye penetrant inspection on the test steel plate, and checking to obtain the cracking condition of the backing weld.
Preferably, the steel plate is a low-alloy high-strength steel CCSEH36 steel plate.
As the preferred scheme, a gap of 8mm is left at the splicing position of the two steel plates.
Preferably, the splicing method of the two steel plates comprises the following steps: and a fixed horse plate is arranged on the back surface of the steel plate and is welded with the steel plate through the horse plate.
As the preferred scheme, the number of the fixed horse boards is three, wherein a horse board is arranged in the middle of the splicing position of the two steel plates, a horse board is arranged on the left side, and a horse board is arranged on the right side.
Preferably, the welding angle between the horse plate and the steel plate is 8 mm.
Preferably, the CO is2When backing weld welding is carried out by gas shielded welding, the welding current is 200-230A, and only one backing weld welding is carried out.
Preferably, the CO is2The thickness of the welding seam is about 3mm when backing welding is carried out by gas shielded welding.
Preferably, the steel plate has a thickness of more than 20mm, a length of 300mm and a width of 150 mm.
Preferably, after the welding is completed, the test steel plate is left for 24 hours and then is subjected to the color flaw detection.
Compared with the prior art, the embodiment of the invention has the following beneficial effects:
according to the invention, the cracking condition of the backing weld is obtained by welding and performing dye penetrant inspection on the test steel plate, so that the crack of the weld is detected, the unqualified weld caused by the generation of hot crack of the weld is avoided, and the welding quality is ensured.
Drawings
FIG. 1: a plate size chart of the test steel plate of the invention;
FIG. 2: a plate groove diagram of the steel plate is tested;
FIG. 3: a welding top view of the test steel plate of the invention;
FIG. 4: a welding front view of the steel plate is tested;
FIG. 5: a three-dimensional schematic diagram of the welding of the test steel plate is shown;
wherein the reference numbers of the drawings in the specification are as follows:
1. a steel plate; 2. a horse board; 3. a ceramic liner; 4. and (7) welding seams.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 5, a preferred embodiment of the present invention provides a method for testing crack resistance of a welding wire, including the following steps:
1) preparing a steel plate, wherein the thickness of the steel plate is more than 20mm, the length of the steel plate is 300mm, the width of the steel plate is 150mm, and a 45-degree groove is formed in one side of a long side;
2) splicing one sides of the grooves of the two steel plates together, and sticking a ceramic liner on the reverse side of the groove;
3) performing backing welding on the horizontal ceramic liner butt weld by CO2 gas shielded welding;
4) and after welding, standing for 24 hours, performing dye penetrant inspection, and checking the cracking condition of a backing weld.
The steel plate is a low-alloy high-strength steel CCSEH36 steel plate.
And a gap of 8mm is reserved when the two steel plates are assembled.
The method for assembling the two steel plates comprises the steps that three fixed horse plates are arranged on the back of each steel plate, one fixed horse plate is arranged in the middle of each steel plate, the other fixed horse plate is arranged on each of the two sides of each steel plate, the horse plates are welded with the steel plates together, and the welding angles of the horse plates and the steel plates are 8 mm.
When backing weld welding is carried out by CO2 gas shielded welding, the welding current is 200-230A, and only one backing weld welding is carried out.
The thickness of the welding seam is about 3mm when the backing welding is carried out by the CO2 gas shielded welding.
Examples
The crack resistance of a certain type of welding material is researched, two E36 steel plates with the size of 300mm x 150mm are prepared, and the long sides of the plates are provided with 45-degree grooves. The two plates are fixed together through 3 horse plates, the plate gap is 8mm, the horse plates and the steel plates are welded together, and the welding angle is 8 mm. The back of the plate is pasted with a ceramic liner. And performing backing welding on the horizontal ceramic liner butt weld by CO2 gas shielded welding, wherein the thickness of the weld is 3 mm. And standing for more than 24 hours, performing dye check, and checking whether a welding line cracks.
By adopting the welding wire crack resistance test method provided by the invention, a simple, convenient and quick method is provided for the welding wire shape selection and welding wire crack resistance test before welding of the marine low-alloy high-strength steel plate, cracks are prevented from occurring in welding seams, and the welding quality is ensured.
The invention provides a crack resistance test method for a flux-cored wire for carbon dioxide gas shielded welding, which can directly and clearly test the crack resistance of a welding material and is a qualified welding material for welding low-alloy high-strength steel for ships. The cracking resistance test method disclosed by the invention is simple to operate, good in effect and high in use value.
The above-mentioned embodiments are provided to further explain the objects, technical solutions and advantages of the present invention in detail, and it should be understood that the above-mentioned embodiments are only examples of the present invention and are not intended to limit the scope of the present invention. It should be understood that any modifications, equivalents, improvements and the like, which come within the spirit and principle of the invention, may occur to those skilled in the art and are intended to be included within the scope of the invention.

Claims (10)

1. A welding wire crack resistance experiment method is characterized by comprising the following steps:
preparing two steel plates, and opening a 45-degree groove on one side of the long sides of the two steel plates;
splicing the long sides of the grooves of the two steel plates together, and sticking ceramic liners on the reverse sides of the grooves of the two steel plates;
by CO2Performing backing welding on the horizontal ceramic liner butt weld seam by gas shielded welding;
and after welding, performing dye penetrant inspection on the test steel plate, and checking to obtain the cracking condition of the backing weld.
2. The experimental method for crack resistance of welding wire as claimed in claim 1, wherein the steel plate is CCSEH36 steel plate which is low alloy high strength steel.
3. The experimental method for crack resistance of welding wire as claimed in claim 1, wherein a gap of 8mm is left at the joint of the two steel plates.
4. The experimental method for crack resistance of welding wire as claimed in claim 1, wherein the splicing method of the two steel plates comprises the following steps: and a fixed horse plate is arranged on the back surface of the steel plate and is welded with the steel plate through the horse plate.
5. The experimental method for crack resistance of welding wire as claimed in claim 4, wherein the number of the installed and fixed horse boards is three, wherein a horse board is arranged in the middle of the joint of the two steel plates, a horse board is arranged on the left side, and a horse board is arranged on the right side.
6. The experimental method for crack resistance of welding wire as claimed in claim 4, wherein the welding angle between the horse plate and the steel plate is 8 mm.
7. The method for testing crack resistance of welding wire as defined in claim 1, wherein said CO is selected from the group consisting of2When backing weld welding is carried out by gas shielded welding, the welding current is 200-230A, and only one backing weld welding is carried out.
8. The method for testing crack resistance of welding wire as defined in claim 1, wherein said CO is selected from the group consisting of2The thickness of the welding seam is about 3mm when backing welding is carried out by gas shielded welding.
9. The experimental method for crack resistance of welding wire as claimed in claim 1, wherein the steel plate has a thickness of more than 20mm, a length of 300mm and a width of 150 mm.
10. The method for testing crack resistance of welding wire according to claim 1, wherein the test steel plate is left for 24 hours after the completion of the welding and then subjected to the dye penetrant inspection.
CN201911038483.3A 2019-10-29 2019-10-29 Welding wire crack resistance experiment method Pending CN110726734A (en)

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CN201911038483.3A CN110726734A (en) 2019-10-29 2019-10-29 Welding wire crack resistance experiment method

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Application Number Priority Date Filing Date Title
CN201911038483.3A CN110726734A (en) 2019-10-29 2019-10-29 Welding wire crack resistance experiment method

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111855952A (en) * 2020-07-31 2020-10-30 山西北方机械制造有限责任公司 Method and device for rapidly testing welding performance of 35# steel
CN116175060A (en) * 2023-04-14 2023-05-30 华南理工大学 Reverse welding horse plate technology for orthotropic steel bridge deck plate assembly welding positioning

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101402159A (en) * 2008-11-07 2009-04-08 江苏科技大学 Device and method for testing weldability for rolled steel for vessel
CN103205627A (en) * 2013-03-28 2013-07-17 宝山钢铁股份有限公司 Low-alloy high-performance wear-resistant steel plate and manufacturing method thereof
CN105057844A (en) * 2015-08-18 2015-11-18 无锡乐华自动化科技有限公司 Welding repair method for cracks on furnace shell of blast furnace
CN108008009A (en) * 2017-11-17 2018-05-08 重庆跃进机械厂有限公司 Friction welding seam detection method
CN109916888A (en) * 2019-03-25 2019-06-21 友联船厂（蛇口）有限公司 The flux-cored wire cracking resistance energy method of inspection

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101402159A (en) * 2008-11-07 2009-04-08 江苏科技大学 Device and method for testing weldability for rolled steel for vessel
CN103205627A (en) * 2013-03-28 2013-07-17 宝山钢铁股份有限公司 Low-alloy high-performance wear-resistant steel plate and manufacturing method thereof
CN105057844A (en) * 2015-08-18 2015-11-18 无锡乐华自动化科技有限公司 Welding repair method for cracks on furnace shell of blast furnace
CN108008009A (en) * 2017-11-17 2018-05-08 重庆跃进机械厂有限公司 Friction welding seam detection method
CN109916888A (en) * 2019-03-25 2019-06-21 友联船厂（蛇口）有限公司 The flux-cored wire cracking resistance energy method of inspection

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111855952A (en) * 2020-07-31 2020-10-30 山西北方机械制造有限责任公司 Method and device for rapidly testing welding performance of 35# steel
CN116175060A (en) * 2023-04-14 2023-05-30 华南理工大学 Reverse welding horse plate technology for orthotropic steel bridge deck plate assembly welding positioning

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Application publication date: 20200124