Side bend test method
A bending test and bending technology, applied in the direction of applying stable bending force to test the strength of materials, etc., can solve the problems of no better, test mechanical properties, and no test methods involved, and achieve comprehensive performance effects
Inactive Publication Date: 2010-09-01
PANGANG GROUP VANADIUM TITANIUM & RESOURCES +1
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Problems solved by technology
However, at present, there is no better way to test the above-mentioned important mechanical properties except that the inventor proposed a "combined fixture" used in the side bending test on May 5, 2008, patent number: 200820112153.8. Moreover, the "Combined Fixture" mentioned above is only a device, and does not involve the test method
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Experimental program
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Embodiment
[0015] After welding with a steel plate with a thickness of 3 mm, process it into 3 to 5 pieces of side bending samples with a width of 20 mm, and mark the original punctuation on the side surface of the sample with a spacing of 10 mm. The original gauge length adopts the fixed gauge distance L0=50mm. Put these samples upright in the sample groove of the side bending combination fixture, adjust the center of the weld seam of the sample as the loading position, and select the bending center diameter as 10mm. Stop loading when the bending angle of the steel plate sample is greater than or equal to 150°. After measuring the length L of the curved surface of the steel plate sample after bending deformation, it is equal to 67.8mm. According to the formula for calculating the lateral bending elongation = (L-L0) / L0×100%, the calculated lateral bending elongation is equal to 35.6%, and there is no Cracks visible to the naked eye, the elongation requirement value of the test steel pla...
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Abstract
The invention discloses a side bend test method for carrying out mechanical property evaluation after a plate is welded, in particular to a side bend test method capable of detecting the side bending property of a metal material. The side bend test method comprises the following steps of: firstly welding a steel plate to be manufactured into a sample; then taking an original gage point on the side of the sample, and recording a gage length L0; then carrying out a side bend test by vertically placing the sample into a sample groove of a combined clamp; and finally measuring a bending length L after the sample is bent, and calculating a bend elongation percentage. A side bending process is carried out on a universal test machine by a method comprising the following steps of: firstly installing the combined clamp on the universal test machine, and regulating a sample groove spacing and a supporting seat spacing of the combined clamp; then vertically placing the sample into the sample groove so that the welding line center of the sample just faces a loading load center; selecting a bending center diameter to load the sample; and measuring the bending length L of the sample after the sample is bent to a specified angle, and calculating the side bend elongation percentage of the metal material according to an elongation percentage calculation formula=(L-L0) / L0*100%.
Description
technical field [0001] The invention relates to a method for side bending test of metal materials, in particular to a side bending method for evaluating the deformation properties of weld seam and heat-affected zone after welding of metal materials, and testing the properties of metal materials such as flaring, roll forming and expansion process. experiment method. Background technique [0002] In the actual industrial production process, the content of the bending test inspection is to conduct a simple frontal three-point bending test on the sample under the required bending center diameter and bending angle, and observe whether the sample has cracks visible to the naked eye after bending deformation. It means that the sample is qualified according to the standard bending test, otherwise it is judged as unqualified according to the experimental standard test. In order to gain a deeper understanding of the physical properties of steel, such as studying the plastic deformati...
Claims
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IPC IPC(8): G01N3/20
Inventor 尤大勇吴菊环胡丽鸣
Owner PANGANG GROUP VANADIUM TITANIUM & RESOURCES