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Repairing technology for fusion welding joint deficiency

A repair and defect technology, applied in the field of melt weld defect repair technology, to achieve the effect of high product quality, simple operation and low experience requirement

Inactive Publication Date: 2016-07-13
CHONGQING XUNSHENG LOCOMOTIVE PARTS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] There is still a certain degree of experience and technicality in the adjustment of process steps and equipment parameters in the existing fusion weld defect repair process. For new operators, a lot of practice is needed to master the operation skills and produce good quality product

Method used

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with embodiment:

[0017] A repair process for molten weld defects, comprising the following steps:

[0018] When it is determined by non-destructive testing that there are excessive defects inside the weld, it should be repaired, and the repair should meet the following requirements:

[0019] 1) Before repairing, responsible technical personnel should prepare the repairing plan;

[0020] 2) According to the defect position and depth determined by non-destructive testing, the defects should be removed by grinding with grinding wheels or carbon arc gouging. When the defect is a crack, stop holes should be drilled at both ends of the crack before carbon arc gouging, and the crack and the 50mm long weld or base metal at both ends should be removed;

[0021] 3) When removing defects, the planing groove should be processed into a groove with four side bevel angles greater than 10°, and the surface should ...

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Abstract

The invention discloses a repairing technology for a fusion welding joint deficiency and the repairing technology is convenient to operate and easy to learn. The repairing technology comprises steps of (2) grinding or cleaning deficiencies via a grinding wheel or carbon arc gouging according to deficiency position and depth determined by nondenstructive testing, drilling stopping holes on two ends of a crack before conducting carbon arc gouging when the deficiency is a crack and removing the crack and welding joint or base material, (3) processing a slot into a groove with four side slopes having angle of more than 10 degrees during dadoing upon deficiency removal, finishing the surface, degassing a gouging carbuized layer and determining whether the crack is thoroughly removed via a liquid penetrating test or magnetic powder inspection method upon necessary, (4) striking an arc in the groove during welding repair, filling an arc crater during arc blowout, staggering joints of welding layers of multi-layer welding, (5) continuously welding for a repair part. In the (4) step the length of a welding joint is more than 100mm; and when the length of the welding joint is more than 500mm, a backstep sequence welding is employed. The repairing technology is simple to operate, requires less experience from operators and can provide products with high quality.

Description

technical field [0001] The invention relates to a process for repairing defects of molten welds. Background technique [0002] There is still a certain degree of experience and technicality in the adjustment of process steps and equipment parameters in the existing fusion weld defect repair process. For new operators, a lot of practice is needed to master the operation skills and produce Good quality product. Contents of the invention [0003] In order to achieve the purpose of the present invention, the present invention provides a repairing process for melting weld defects that is convenient, quick and easy to use. [0004] In order to solve the problems of the technologies described above, the present invention adopts the following technical solutions: [0005] A repair process for molten weld defects, comprising the following steps: [0006] When it is determined by non-destructive testing that there are excessive defects inside the weld, it should be repaired, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P6/00B23P6/04
Inventor 王强
Owner CHONGQING XUNSHENG LOCOMOTIVE PARTS CO LTD
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