A kind of surfacing layer repair welding method
A technology for surfacing and repairing welding, applied in the field of surfacing layer repairing welding, can solve the problems of difficulty in controlling the quality of repairing welding, not specifying the distribution of repairing bead and the welding sequence of repairing welding, etc., so as to improve the welding quality, Avoid recurring effects
Active Publication Date: 2018-07-06
SHANGHAI ELECTRIC NUCLEAR POWER EQUIP CO LTD
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Problems solved by technology
In general, after the defects of the stainless steel surfacing layer or nickel-based alloy surfacing layer are removed, the repair welding whose depth is below the fusion line between the component base metal and the surfacing layer does not stipulate the distribution of repair welding beads and the welding sequence of repair welding, so It is difficult to control the welding quality of repair welding
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[0029] based on the following Figure 1 ~ Figure 2 , specifically explain the preferred embodiment of the present invention.
[0030] like figure 1 As shown, the present invention provides a kind of overlay repair welding method, aiming at the stainless steel overlay or nickel-based alloy overlay with carbon steel or low-alloy steel material as the component base material, for after welding or heat treatment of overlay Finally, the groove formed by the defect is removed for repair welding. The depth of the groove after the defect is removed is below the fusion line between the base metal of the component and the surfacing layer. The repair welding method includes the following steps:
[0031] Step S1, removing defects to form a repair welding groove;
[0032] After non-destructive testing of the surfacing layer finds out-of-standard defects, the defects are removed by grinding or machining to form repair welding grooves;
[0033] The repair welding groove is in the shape of...
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The invention discloses an overlaying layer repair welding method for repair welding of removed defects after welding or heat treatment of an overlaying layer. The depth after removing the defects is positioned below a part parent metal and overlaying layer melting line; firstly, the defects are removed to form a repair welding groove; then, the pretreatment before repair welding is performed; the repair welding is performed according to stated welding way distribution and welding sequence; and finally, the treatment after repair welding is performed. Aiming at the repair welding condition that the depth after removing the defects of the overlaying layer is below the part parent metal and overlaying layer melting line, the method states the repair welding way distribution and welding sequence in repair welding of the overlaying layer, so that the regeneration of the defects is preferably prevented, and the product welding quality is improved.
Description
technical field [0001] The invention relates to a repair welding method for a surfacing layer. Background technique [0002] In the field of nuclear power or chemical containers, a certain thickness of stainless steel or nickel-based alloy corrosion-resistant layer is surfacing on the surface of product parts (the base material is carbon steel or low-alloy steel material), and it is found to exceed the standard in the non-destructive flaw detection after welding or heat treatment of the surfacing layer Defects, in order to ensure the quality of the surfacing layer, it is necessary to remove and repair the defects. In general, after the defects of the stainless steel surfacing layer or nickel-based alloy surfacing layer are removed, the repair welding whose depth is below the fusion line between the component base metal and the surfacing layer does not stipulate the distribution of repair welding beads and the welding sequence of repair welding, so It is difficult to control...
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IPC IPC(8): B23K9/04
CPCB23K9/04
Inventor 李双燕吴琼罗吾希
Owner SHANGHAI ELECTRIC NUCLEAR POWER EQUIP CO LTD