Processing method of Charpy impact?samples
A technology of Charpy impact specimen and processing method, which is applied in the preparation of test samples, etc., can solve the problems of Charpy impact energy test of unsuitable materials and so on.
Active Publication Date: 2013-07-10
BC P INC CHINA NAT PETROLEUM CORP
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[0006] In order to solve the problem that the existing test and sample processing standards are not applicable to the Charpy impact energy test of the material at the fusion line of the pipeline steel submerged arc welding seam, the present invention proposes a Charpy impact sample processing method in which a notch is processed at a certain position method
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[0011] In order to deeply understand the present invention, the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0012] See attached figure 1 , the processing method of the Charpy impact test sample provided by the present invention comprises the following steps: starting from the junction A of the inner weld fusion line 2 and the inner surface 3 of the Charpy impact test sample prototype 1, the steel pipe surface is deflected to the center line of the weld seam Move the position of 1mm to mark B, and start from the mark B, process the notch along the length direction perpendicular to the prototype 1, so that the notch axis is perpendicular to the surface of the steel pipe. figure 1 The number 4 in is the notch centerline of the Charpy impact specimen.
[0013] Wherein, as a specific implementation of the method of processing the notch along the length direction perpendicular to the prototype 1, the ...
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The invention discloses a processing method of Charpy impact?samples for process gaps at determined positions, belonging to the technical field of test methods for material properties. The method comprises: marking at a position shifting to a weld centerline for 1 mm on a steel pipe surface from a juncture of an inner weld fusion line and an inner surface of a prototype of the Charpy impact?samples, using the marking position as a starting point, and processing the gaps along a length direction perpendicular to the prototype, so that axis of the gaps is perpendicular to the steel pipe surface. The processing method of the Charpy impact?samples solves problems of processing positions for the gaps of the Charpy impact?samples at weld fusion lines of pipeline steels through submerged arc welding, fills blanks of detecting Charpy impact energy at the weld fusion lines by the submerged arc welding, and furthermore is capable of obtaining material fracture toughness at weak links of the pipeline steel, so that safety assessment for the weak links of the pipeline steel can be carried out. The method has important significance for material performance testing, safety assessment of the pipeline steel, failure analysis and other engineering applications.
Description
technical field [0001] The invention relates to the technical field of material performance testing methods, in particular to a method for processing a notched Charpy impact sample at a determined position. Background technique [0002] With the rapid development of the world economy, the demand for oil and natural gas is increasing day by day. As the most economical and safe transportation method for oil and natural gas, pipeline transportation has achieved tremendous development in the past 40 years. However, during the service period, the pipeline may cause various damages due to corrosion, mechanical damage, geological disasters and other factors, and there may also be construction and material defects. Severe damage and defects will cause pipeline leakage and cracking. According to statistical analysis, the failure accidents caused by construction and material defects accounted for 19.13% of the global pipeline failure accidents, ranking second. For welded steel pipes,...
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Inventor 张良冯耀荣罗金恒张广利
Owner BC P INC CHINA NAT PETROLEUM CORP