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Welding restraint stress test method and welding restraint stress test device manufacturing method

A technology of stress testing and welding restraint, applied in the field of welding restraint stress testing device manufacturing, which can solve the problems of large welding stress, restraint of welded joints, limitation of welded structure, etc.

Active Publication Date: 2019-02-19
CHINA SHENHUA ENERGY CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problem of on-site welding is the limitation of the welding structure, which leads to a large restraint of the welded joint, thus forming a large welding stress during the welding process
Improper welding process will increase the damage of this effect

Method used

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  • Welding restraint stress test method and welding restraint stress test device manufacturing method
  • Welding restraint stress test method and welding restraint stress test device manufacturing method
  • Welding restraint stress test method and welding restraint stress test device manufacturing method

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Embodiment Construction

[0023] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0024] In the welding restraint stress testing method of the present invention, the welding restraint stress testing method includes: providing a welding restraint stress testing device, the welding restraint stress testing device includes a part to be welded that simulates actual welding conditions; The amount and / or the size of the piece to be welded, and the welding residual stress of the piece to be welded in the welding restraint stress test device.

[0025]In this way, in the welding restraint stress test method, since the welding restraint stress test device includes a piece to be welded that simulates actual welding conditions, the piece to be welded can...

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Abstract

The invention relates to the field of welding restrained stress testing, and discloses a welding restrained stress test method comprising the steps of providing a welding restrained stress test device including a to-be-welded member that simulates actual welding conditions; and according to the deflection amount of the to-be-welded member and / or the size of the to-be-welded member, the welding residual stress of the to-be-welded member is measured in the welding restrained stress test device. The welding restraint stress test method can simulate actual welding conditions to study the effect of the welding process on the structure and properties of a welded joint and the mechanism of welding crack formation under conditions of relatively large constraint so as to optimize welding process parameters and reduce and avoid the welding joint Leakage due to cracks.

Description

technical field [0001] The invention relates to the technical field of welding restraint stress testing of welded parts, in particular to a welding restraint stress testing method and a manufacturing method of a welding restraint stress testing device. Background technique [0002] At present, a large number of T / P91 (92), Super304H and T23 heat-resistant steels have been introduced and used in supercritical and ultra-supercritical units in China. These steels are used in water-cooled walls, superheaters and reheater tubes of boiler units. For example, P91 steel pipe is the preferred material for subcritical main steam pipes, headers, main steam and reheating section pipes and headers of supercritical units, and P91 steel pipes are also used for intermediate headers and connecting pipes of ultra-supercritical boilers. [0003] For another example, in the use of steel such as T23, it is found that cracks are easy to occur during on-site welding, and most of them are welding c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L5/00
CPCG01L5/0047
Inventor 陆亚中李健孟德龙芦纲
Owner CHINA SHENHUA ENERGY CO LTD
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