Method for welding stainless steel butt joint plate with thickness of 0.5 mm through manual pulse argon tungsten-arc welding
A technology of argon tungsten arc welding and stainless steel plate, which is applied in welding/welding/cutting items, welding equipment, welding accessories, etc., which can solve the problem of safe use of welded joints that cannot meet the performance requirements of welding processes, poor welding fusion, and fuel tanks. Safety hazards and other issues, to meet the performance requirements of the welding process and to overcome the poor welding fusion, the effect of excellent welding joint performance
Inactive Publication Date: 2020-10-16
DALIAN BAOYUAN NUCLEAR EQUIP
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Problems solved by technology
[0002] A kind of nuclear fuel tank in the nuclear field needs to use 0.5mm thick stainless steel butt plate. At present, the commonly used welding methods for thin stainless steel plates (4 ~ 10mm) are argon tungsten arc welding and electrode arc welding, and for welding 0.5mm thick The stainless steel butt plate is difficult, especially when the welding length is greater than 100mm, the welding fusion is not good with manual pulse tungsten argon arc welding (TIG), it is easy to deform, the joint performance is poor, it is difficult to connect, and it cannot meet the performance requirements of the welding process and the welding joint safe use
Method used
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Embodiment Construction
[0014] Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0015] This embodiment discloses a method for welding 0.5mm thick stainless steel butt joint plates with manual pulse tungsten argon arc welding (TIG), comprising the following steps:
[0016] Step 1, process grooves at the ends of the two stainless steel plates to be welded, and perform degreasing, water removal and oxide film treatment on the grooves and groove edges;
[0017] Step 2. Place the two stainless steel plates to be welded on the tooling, align the weld seam with the copper tube protective cover, and protect the back of the weld seam with the argon gas discharged from the small hole on the copper tube;
[0018] Step 3. Preset pulse current 20±1A, base value current 10A, arc starting current 5±1A, arc ending current 5±1A, arc starting rising time 2s...
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The invention provides a method for welding a stainless steel butt joint plate with the thickness of 0.5 mm through manual pulse argon tungsten-arc welding. The method comprises the steps of pretreatment before welding, and the preset value of a welding machine is adjusted, so that the performance requirement of the welding process and the safe use of a welding joint are met. Specifically, pulse current 20 + / -1A, base current 10A, arc starting current 5 + / -1A, arc stopping current 5 + / -1A, arc starting rising time 2s, arc stopping falling time 1s, pulse frequency 5-7Hz, pulse width 18%, gas lag time 10s, back gas shielding flow larger than 25L / min, and protective gas flow of a welding gun 8-19 L / min are preset on the welding machine.
Description
technical field [0001] The invention relates to the technical field of metal material welding, in particular to a method for welding 0.5mm thick stainless steel butt plates with manual pulse tungsten argon arc welding. Background technique [0002] A kind of nuclear fuel tank in the nuclear field needs to use 0.5mm thick stainless steel butt plate. At present, the commonly used welding methods for thin stainless steel plates (4 ~ 10mm) are argon tungsten arc welding and electrode arc welding, and for welding 0.5mm thick The stainless steel butt plate is difficult, especially when the welding length is greater than 100mm, the welding fusion is not good with manual pulse tungsten argon arc welding (TIG), it is easy to deform, the joint performance is poor, it is difficult to connect, and it cannot meet the performance requirements of the welding process and the welding joint Safe to use. More to fuel tank has brought serious potential safety hazard. Contents of the inventio...
Claims
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IPC IPC(8): B23K9/167B23K9/09B23K9/067B23K9/29B23K9/32B23K103/04
CPCB23K9/167B23K9/09B23K9/067B23K9/29B23K9/32B23K2103/05
Inventor 彭洋王军苗卉李嘉美付启帅王玉艳王研冯爱秀王嵩杨凤王殿祥
Owner DALIAN BAOYUAN NUCLEAR EQUIP