Micro pressure shear experimental device and testing method of mechanical property of fusion welding microcell

A technology of fusion welding and experimental device, which is applied in the direction of applying stable shear force to test the strength of materials, etc., can solve the problems of inconvenient test operation, waste of samples, strict samples, etc. Simple, simple-shaped effects

Inactive Publication Date: 2012-10-31
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These test devices are generally expensive, and the requirements for the sample are relatively strict, the test operation is inconvenient, and at the same time, it will cause a certain waste of the sample.

Method used

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  • Micro pressure shear experimental device and testing method of mechanical property of fusion welding microcell
  • Micro pressure shear experimental device and testing method of mechanical property of fusion welding microcell
  • Micro pressure shear experimental device and testing method of mechanical property of fusion welding microcell

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Embodiment Construction

[0042] Before the test, the samples were first ground. Then there is the installation of the test equipment and the adjustment of the test machine. After everything is ready, the micro-compressive shear test can be carried out. During the test, the test system starts to work, and the load-displacement curve is continuously output, and the data is also stored in the computer. After the test is completed, the data can be taken out from the computer and processed to obtain the required mechanical property data and curves. The test example of the nuclear power rotor material 20Cr2NiMo submerged arc welding joint is illustrated:

[0043] 1) Grinding samples such as Figure 4 As shown, a sample with a size of 60×10×0.8mm was cut from the weld (the sample includes the heat-affected zone of the weld and the base metal on both sides of the weld). Then the surface of the sample is polished from rough grinding to fine grinding, using water sandpaper according to 90 # , 400 # , 800 #...

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Abstract

The invention provides a micro pressure shear experimental device and a testing method of mechanical property of a fusion welding microcell. The experimental device comprises a base, a lower die, a guide pressure head, a pressure head and a pressure rod, wherein the center of the base is provided with a concave table; the upper part of the base is provided with two guide posts, a groove is formed between the two guide posts, and the groove is communicated with a concave table; the lower die is installed in the concave table, and the top surface of the lower die is in flush with the bottom of the groove; a cylindrical hole is arranged between the two guide posts, and the guide pressure head is installed in the cylindrical hole; the center of the guide pressure head is provided with a guide hole; and the pressure head and the pressure rod are installed in the guide hole. The micro pressure shear experimental device provided by the invention is reasonable in design, can guarantee the loading precision and accuracy, is reliable in data collection, and is accurate in obtained load-displacement curve of each cell; and through testing, shear strength and an engineering shear stress-strain curve of a welding joint parent metal joint are obtained, and can be expanded to each cell of the joint, thus a microcell heterogenous mechanical property of the joint can be obtained.

Description

【Technical field】 [0001] The invention relates to the field of testing the heterogeneous mechanical properties of fusion welding micro-zones in the field of engineering applications, in particular to a micro-compression shear test method for testing the mechanical properties of fusion welding micro-zones of metal materials. 【Background technique】 [0002] Inhomogeneous mechanical properties exist in the molten welding micro-area of ​​metal materials, which makes the welded joint the most vulnerable part of the entire welded structure, which has a great impact on the life of the entire weldment. The accurate evaluation of the mechanical properties of the fusion welding micro-zone (weld seam and heat-affected zone) of metallic materials has been widely concerned. Due to the great mechanical inhomogeneity in the performance of welding micro-zones (weld seam and heat-affected zone), it is difficult to obtain the mechanical properties of materials in different areas of welded joi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/24
Inventor 张建勋郭伟牛靖赵锡龙朱彤
Owner XI AN JIAOTONG UNIV
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