Austenite stainless steel welding-wire for small-current high-speed welding
A technology of austenitic stainless steel and austenitic system, applied in welding medium, welding equipment, welding/cutting medium/material, etc., can solve the problems of discontinuous weld bead, wire torsion, bending, large wire feeding load, etc.
Inactive Publication Date: 2006-02-08
KISWEL LTD
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Problems solved by technology
[0011] This unstable electron movement, accompanied by rapid movement of the molten pool caused by high-speed welding, is the main cause of arc breaks and weld bead discontinuities
[0012] On the other hand, in order to improve wire feeding performance, there are methods of coating lubricating oil on the surface of welding wire (Japanese Patent Publication 2682814, Japanese Laid-Open Patent Publication 11-147174, Japanese Laid-Open Patent Publication 2000-94178, etc.), and methods of making the surface shape uniform (Korean Patent No. 134857, etc.), but in the case of long and twisted electric welding cables, the load on the wire feeding is large, and the welding wire will still be twisted and bent only by controlling the surface of the welding wire, and poor wire feeding may also occur.
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[0019] The present invention will be described in detail below with reference to the accompanying drawings.
[0020] This application is related to Korean Patent Application No. 2000-36126 (correspondingly, Japanese Patent Application No. 2001-189298) filed on June 28, 2000, which is incorporated by reference as a part of this specification.
[0021] The welding wire referred to in this specification and the scope of the patent application refers to the austenitic stainless steel welding wire for MIG welding, and the arbitrary interval refers to an arbitrarily selected interval when a welding interval of 0.1 second is arbitrarily selected among all welding wires.
[0022] The inventors of the present application have found that the coefficient of variation ratio (coefficient of variation of welding current / welding voltage If the value of the variation coefficient) is kept in the range of 0.3 to 0.7, the arc stability will be significantly improved. The results of in-depth res...
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To provide a wire for welding austenite-based stainless steel exhibiting excellent arc stability under the welding condition of low current short circuiting transfer of welding speed 30-70 CPM. By providing the wire for welding the austenite-based stainless steel, wherein on the basis of a Hv 1 hardness tester, the difference between the center part of the wire and the surface part is 18 or less, the difference among the hardness measured at a distance of arbitrary 200 mm in the longitudinal direction of the wire is 15 or less, and the value of a trace element (Si+P+S+N) / Mn is 0.19-0.62, the arc stability is enhanced, and excellent welding quality and welding workability are secured.
Description
technical field [0001] The present invention relates to the invention of the austenitic stainless steel welding wire, specifically the invention of the austenitic stainless steel welding wire which improves the wire feeding performance and arc stability during low-current high-speed welding and obtains high welding quality. Background technique [0002] Stainless steel is an alloy steel that adds chromium to steel to improve its corrosion resistance. According to its composition, it is mainly divided into two categories: chromium system and chromium-nickel system. Austenitic system, austenite-ferritic system and precipitation hardening type 5 types. [0003] Austenitic stainless steel is chromium-nickel stainless steel. Its representative and most economical composition is 18-8 stainless steel containing 18% chromium and 8% nickel. On this basis, some improved steel grades have been developed. . [0004] Recently, the entire industry requires high-speed and high-efficiency...
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IPC IPC(8): B23K35/22B23K35/30
CPCB23K35/0261B23K35/24B23K2103/04
Inventor 李在炯
Owner KISWEL LTD