CN113218779A - Bending test method for dissimilar steel welding - Google Patents
Bending test method for dissimilar steel welding Download PDFInfo
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- CN113218779A CN113218779A CN202110361405.8A CN202110361405A CN113218779A CN 113218779 A CN113218779 A CN 113218779A CN 202110361405 A CN202110361405 A CN 202110361405A CN 113218779 A CN113218779 A CN 113218779A
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- dissimilar steel
- bearing seat
- bending test
- pressure bearing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/20—Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces
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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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0023—Bending
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- Immunology (AREA)
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- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a bending test method for dissimilar steel welding, which comprises the following steps: (1) downwards abutting against a first position outside a first fusion line on one side of a welding seam area on the dissimilar steel sample until two sides of the first position form a first angle; (2) downwards abutting against a second position outside a second fusion line on the other side of the welding seam area on the dissimilar steel sample until two sides of the second position form a second angle; (3) and downwards abutting against the central position of the welding seam area until the dissimilar steel sample is bent and formed. According to the bending test method for dissimilar steel welding, the first angle and the second angle limit the pressure head, so that the abutting force of the dissimilar steel sample can be ensured to always act on the central position of the welding seam area, the dissimilar steel sample can be integrally bent by taking the central position of the welding seam area as the center, and the accuracy of the bending test result is ensured.
Description
Technical Field
The invention relates to a bending test method for dissimilar steel welding.
Background
In the prior art, a bending test for dissimilar steel welding is used for detecting defects of a welding part of dissimilar steel and the plastic deformation capacity of a welding seam.
In one case, the strength is different due to the different materials on both sides of the dissimilar steel weld zone. The xenogenesis steel sample of placing on first bearing seat and second bearing seat is directly supported through the pressure head and is pressed, can lead to the crooked inconsistent of both sides material for the central point that the pressure head deviates weld zone region on the xenogenesis steel sample puts, and the degree of deviation is relevant with welding seam both sides material intensity difference, and when intensity was close, the degree of deviation was less, and when intensity differed great, the degree of deviation was great. In another case, the performance indexes of the weld material, the heat affected zones on two sides and the base material are not matched, and the deformation of the heat affected zones is basically concentrated in the weld area due to direct pressing, so that the weld area of the sample cannot be completely attached to the pressure head, and the detection result is distorted. This results in an inaccurate test result in the bending test.
Disclosure of Invention
The invention aims to provide a bending test method for dissimilar steel welding, which can ensure that the abutting pressure of a dissimilar steel sample always acts on the central position of a welding seam area so as to ensure the accuracy of a bending test result.
In order to achieve the purpose, the invention adopts the technical scheme that:
a bending test method for dissimilar steel welding comprises the following steps:
(1) downwards abutting against a first position outside a first fusion line on one side of a welding seam area on the dissimilar steel sample until two sides of the first position form a first angle;
(2) downwards abutting against a second position on the other side of the welding seam area on the dissimilar steel test sample, wherein the second position is outside a second fusion line until two sides of the second position form a second angle;
(3) and downwards abutting against the central position of the welding seam area until the dissimilar steel sample is bent and formed.
Preferably, in the step (1), the dissimilar steel sample is flatly placed on a first pressure bearing seat and a second pressure bearing seat which are arranged at intervals, and the first position is located between the first pressure bearing seat and the second pressure bearing seat;
in the step (2), the dissimilar steel sample on the first position side is placed on the first pressure receiving block and the second pressure receiving block, and the second position is located between the first pressure receiving block and the second pressure receiving block;
in the step (3), the dissimilar steel sample between the first position and the second position is placed between the first pressure receiving block and the second pressure receiving block so that the weld region is located between the first pressure receiving block and the second pressure receiving block.
More preferably, in step (1), the first position is located at a central position between the first pressure bearing seat and the second pressure bearing seat;
in step (2), the second position is located at a central position between the first pressure bearing seat and the second pressure bearing seat;
in the step (3), the weld region is located at a central position between the first pressure bearing seat and the second pressure bearing seat.
More preferably, in step (3), the first position and the second position are both located between the first pressure bearing seat and the second pressure bearing seat.
More preferably, in the step (3), the center position of the weld zone is pressed downwards by a pressing head until the pressing head is pressed between the first pressure bearing seat and the second pressure bearing seat, so that both sides of the dissimilar steel sample are bent vertically upwards.
Preferably, the first angle and the second angle are the same or different.
More preferably, in the step (1), the first position is pressed downwards, and the pressing stroke is 10-15 mm;
and (3) in the step (2), the second position is pressed downwards, and the pressing stroke is 10-15 mm.
Preferably, a first distance between the first location and the first weld line is equal to or different from a second distance between the second location and the second weld line.
More preferably, the first distance is 10-15mm and the second distance is 10-15 mm.
Preferably, in the step (3), the downward pressing speed is 50 to 70 mm/min.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages: the invention relates to a bending test method for dissimilar steel welding, which comprises the steps of firstly respectively pressing the outer sides of a first fusion line and a second fusion line at two sides of a welding seam area to form a first angle and a second angle, then pressing the outer sides of the first fusion line and the second fusion line between the first position and the second position, limiting a pressure head by the first angle and the second angle, ensuring that the pressing force of a dissimilar steel sample always acts on the central position of the welding seam area, and bending the dissimilar steel sample by taking the central position of the welding seam area as a center to ensure the accuracy of a bending test result.
Drawings
FIG. 1 is a schematic diagram of a dissimilar steel sample before bending in step (1) of a bending test method for dissimilar steel welding according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a dissimilar steel sample after bending in step (1) of a bending test method for dissimilar steel welding according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a dissimilar steel sample before bending in step (2) of a bending test method for dissimilar steel welding according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a dissimilar steel sample after bending in step (2) of a bending test method for dissimilar steel welding according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a dissimilar steel sample before bending in step (3) of a bending test method for dissimilar steel welding according to an embodiment of the present invention;
fig. 6 is a schematic view of a dissimilar steel sample after bending in step (3) of a bending test method for dissimilar steel welding according to an embodiment of the present invention.
Wherein: 1. dissimilar steel samples; 2. a weld region; 3. a first weld line; 4. a first position; 5. a second weld line; 6. a second position; 7. a first pressure bearing seat; 8. a second pressure bearing seat; 9. and (4) pressing head.
Detailed Description
The technical solution of the present invention is further explained below with reference to the specific embodiments and the accompanying drawings.
Referring to fig. 1 to 6, the present embodiment provides a bending test method for dissimilar steel welding, including the steps of:
(1) the dissimilar steel sample 1 is horizontally placed on a first pressure bearing seat 7 and a second pressure bearing seat 8 which are arranged at intervals, a pressure head 9 is used for downwards abutting against a first position 4 outside a first fusion line 3 on one side of a welding seam area 2 on the dissimilar steel sample 1 until two sides of the first position 4 form a first angle, and the first position 4 is located between the first pressure bearing seat 7 and the second pressure bearing seat 8.
Referring to fig. 1-2, the first weld line 3 is located at the left edge of the weld zone 2, and the first location 4 is located to the left of the first weld line 3; in this embodiment, the first position 4 is located at a central position between the first pressure bearing block 7 and the second pressure bearing block 8.
After the step (1) is finished, the dissimilar steel sample 1 is in a two-section bending shape, and each section is a straight line.
(2) The dissimilar steel sample 1 on one side of the first position 4 is flatly placed on the first pressure bearing seat 7 and the second pressure bearing seat 8, and is downwards abutted against the second position 6 outside the second fusion line 5 on the other side of the welding seam area 2 on the dissimilar steel sample 1 through the pressure head 9 until two sides of the second position 6 form a second angle, and the second position 6 is located between the first pressure bearing seat 7 and the second pressure bearing seat 8.
Referring to fig. 3-4, the second weld line 5 is located at the right edge of the weld region 2, and the second location 6 is located to the right of the second weld line 5; in the present embodiment, the dissimilar steel sample 1 to the right of the first position 4 is placed on the first pressure receiving block 7 and the second pressure receiving block 8, and the second position 6 is located at a central position between the first pressure receiving block 7 and the second pressure receiving block 8.
After the step (2) is completed, the dissimilar steel sample 1 is in a three-section type bent shape, and each section is a straight line.
(3) The heterogeneous steel sample 1 between the first position 4 and the second position 6 is horizontally placed between the first pressure bearing seat 7 and the second pressure bearing seat 8, the welding seam area 2 is located between the first pressure bearing seat 7 and the second pressure bearing seat 8, the central position of the welding seam area 2 is downwards supported and pressed through the pressure head 9 until the pressure head 9 downwards jacks between the first pressure bearing seat 7 and the second pressure bearing seat 8, the heterogeneous steel sample 1 is bent and formed, two sides of the bent and formed heterogeneous steel sample 1 are vertically upwards, and the whole heterogeneous steel sample 1 is in a U shape.
As shown in fig. 5 to 6, the first position 4 and the second position 6 are located between the first pressure bearing seat 7 and the second pressure bearing seat 8, the first position 4 is located at the right side of the first pressure bearing seat 7, and the first position 4 is lower than the top of the first pressure bearing seat 7; the second position 6 is located to the left of the second bearing block 8, and the second position 6 is lower than the top of the second bearing block 8. In the present embodiment, the weld zone 2 is located at a central position between the first and second pressure bearing seats 7 and 8.
Referring to fig. 1 to 6, the first pressure receiving base 7 and the second pressure receiving base 8 are pressure receiving rollers, and are arranged in the same shape and at the same height, and the axes thereof are parallel to each other. The lower part of the pressure head 9 is a round roller which is parallel to the axial lead of the bearing roller and is vertical to the dissimilar steel sample 1; the two sides of the upper part of the pressure head 9 along the arrangement direction of the first bearing seat 7 and the second bearing seat 8 are parallel to each other. The upper and lower parts of the ram 9 are equally wide in the arrangement direction of the first and second pressure receiving seats 7 and 8, and the distance between the first and second pressure receiving seats 7 and 8 is equal to the diameter of the circular roller plus twice the thickness of the dissimilar steel sample 1.
The first angle and the second angle are the same or different. In the embodiment, in the step (1), the pressing head 9 presses the first position 4 downwards, and the pressing stroke is 10-15 mm; in the step (2), the pressing head 9 presses the second position 6 downwards, and the pressing stroke is 10-15 mm.
The first distance between the first location 4 and the first weld line 3 is equal to or different from the second distance between the second location 6 and the second weld line 5. In this embodiment, the first distance is 10-15mm and the second distance is 10-15 mm.
In this embodiment, in the step (3), the pressing speed of the pressing head 9 is 50 to 70 mm/min.
The invention relates to a bending test method for dissimilar steel welding, which comprises the steps of firstly respectively pressing a first position 4 and a second position 6 outside a first fusion line 3 and a second fusion line 5 of a welding seam area 2 to form a first angle and a second angle, and then pressing the welding seam area 2 between the first position 4 and the second position 6, wherein the first angle and the second angle limit a pressure head 9, so that the pressing force on a dissimilar steel sample 1 can be ensured to always act on the central position of the welding seam area 2, and the dissimilar steel sample 1 can be integrally bent by taking the central position of the welding seam area 2 as the center, so that the accuracy of a bending test result is ensured.
The first angle and the second angle are respectively arranged at the first position 4 and the second position 6 to pre-deform the dissimilar steel sample 1, and when the welding seam area 2 is subjected to abutting deformation subsequently, even if a small offset exists between the center positions of the pressure head 9 and the welding seam area 2, the offset is limited between the first position 4 and the second position 6, and the accuracy of a bending test result can still be ensured.
The above-mentioned embodiments are merely illustrative of the technical idea and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered in the scope of the present invention.
Claims (10)
1. A bending test method for dissimilar steel welding is characterized in that: the method comprises the following steps:
(1) downwards abutting against a first position outside a first fusion line on one side of a welding seam area on the dissimilar steel sample until two sides of the first position form a first angle;
(2) downwards abutting against a second position on the other side of the welding seam area on the dissimilar steel test sample, wherein the second position is outside a second fusion line until two sides of the second position form a second angle;
(3) and downwards abutting against the central position of the welding seam area until the dissimilar steel sample is bent and formed.
2. The bending test method for dissimilar steel welding according to claim 1, characterized in that: in the step (1), the dissimilar steel sample is flatly placed on a first pressure bearing seat and a second pressure bearing seat which are arranged at intervals, and the first position is positioned between the first pressure bearing seat and the second pressure bearing seat;
in the step (2), the dissimilar steel sample on the first position side is placed on the first pressure receiving block and the second pressure receiving block, and the second position is located between the first pressure receiving block and the second pressure receiving block;
in the step (3), the dissimilar steel sample between the first position and the second position is placed between the first pressure receiving block and the second pressure receiving block so that the weld region is located between the first pressure receiving block and the second pressure receiving block.
3. The bending test method for dissimilar steel welding according to claim 2, characterized in that: in step (1), the first position is located at a central position between the first pressure bearing seat and the second pressure bearing seat;
in step (2), the second position is located at a central position between the first pressure bearing seat and the second pressure bearing seat;
in the step (3), the weld region is located at a central position between the first pressure bearing seat and the second pressure bearing seat.
4. The bending test method for dissimilar steel welding according to claim 2, characterized in that: in step (3), the first position and the second position are both located between the first pressure bearing seat and the second pressure bearing seat.
5. The bending test method for dissimilar steel welding according to claim 2, characterized in that: in the step (3), the central position of the welding seam area is pressed downwards through a pressure head until the pressure head is jacked into the space between the first pressure bearing seat and the second pressure bearing seat, so that two sides of the dissimilar steel sample are bent upwards vertically.
6. The bending test method for dissimilar steel welding according to claim 1, characterized in that: the first angle and the second angle are the same or different.
7. The bending test method for dissimilar steel welding according to claim 6, characterized in that: in the step (1), the first position is pressed downwards, and the pressing stroke is 10-15 mm;
and (3) in the step (2), the second position is pressed downwards, and the pressing stroke is 10-15 mm.
8. The bending test method for dissimilar steel welding according to claim 1, characterized in that: a first distance between the first location and the first weld line is equal to or different than a second distance between the second location and the second weld line.
9. The bending test method for dissimilar steel welding according to claim 8, characterized in that: the first distance is 10-15mm, and the second distance is 10-15 mm.
10. The bending test method for dissimilar steel welding according to claim 1, characterized in that: in the step (3), the downward pressing speed is 50-70 mm/min.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110361405.8A CN113218779B (en) | 2021-04-02 | 2021-04-02 | Bending test method for dissimilar steel welding |
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| CN202110361405.8A CN113218779B (en) | 2021-04-02 | 2021-04-02 | Bending test method for dissimilar steel welding |
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| CN113218779A true CN113218779A (en) | 2021-08-06 |
| CN113218779B CN113218779B (en) | 2023-03-03 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101936855A (en) * | 2010-08-06 | 2011-01-05 | 哈尔滨工业大学 | Device and method for testing bending property of joint for welding and connecting dissimilar materials |
| CN202182844U (en) * | 2011-07-22 | 2012-04-04 | 宝山钢铁股份有限公司 | Anti-slip lateral bend specimen for welding joint |
| CN203299056U (en) * | 2013-06-13 | 2013-11-20 | 中昊晨光化工研究院有限公司 | Special testing machine for dissimilar steel welding joint transverse bending test |
| CN205826434U (en) * | 2016-07-28 | 2016-12-21 | 山东核电设备制造有限公司 | A kind of for different steel weld part bend test device |
| CN110160844A (en) * | 2019-04-19 | 2019-08-23 | 洛阳双瑞特种装备有限公司 | A kind of bend specimen forming method for dissimilar steel welding technology evaluation |
| CN209764615U (en) * | 2019-03-20 | 2019-12-10 | 东方电气集团东方锅炉股份有限公司 | Dissimilar steel welding bending test device |
| CN209820963U (en) * | 2019-01-18 | 2019-12-20 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | Four-point bending fatigue test device for dissimilar steel welded joint |
-
2021
- 2021-04-02 CN CN202110361405.8A patent/CN113218779B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101936855A (en) * | 2010-08-06 | 2011-01-05 | 哈尔滨工业大学 | Device and method for testing bending property of joint for welding and connecting dissimilar materials |
| CN202182844U (en) * | 2011-07-22 | 2012-04-04 | 宝山钢铁股份有限公司 | Anti-slip lateral bend specimen for welding joint |
| CN203299056U (en) * | 2013-06-13 | 2013-11-20 | 中昊晨光化工研究院有限公司 | Special testing machine for dissimilar steel welding joint transverse bending test |
| CN205826434U (en) * | 2016-07-28 | 2016-12-21 | 山东核电设备制造有限公司 | A kind of for different steel weld part bend test device |
| CN209820963U (en) * | 2019-01-18 | 2019-12-20 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | Four-point bending fatigue test device for dissimilar steel welded joint |
| CN209764615U (en) * | 2019-03-20 | 2019-12-10 | 东方电气集团东方锅炉股份有限公司 | Dissimilar steel welding bending test device |
| CN110160844A (en) * | 2019-04-19 | 2019-08-23 | 洛阳双瑞特种装备有限公司 | A kind of bend specimen forming method for dissimilar steel welding technology evaluation |
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