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Plasma and TIG double-gun welding method applicable to nickel and nickel alloy

A technology of plasma welding and welding method, which is applied in the direction of welding equipment, metal processing equipment, manufacturing tools, etc., can solve the problem of arc sensitivity to neutral, and achieve the effects of improving the shape of the weld surface, saving time, and improving production efficiency

Inactive Publication Date: 2017-02-08
LANZHOU UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

However, the plasma arc column is thin, and the weld seam is sensitive to the neutrality of the arc. The plasma torch must be strictly aligned with the weld seam to obtain a high joint quality.

Method used

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  • Plasma and TIG double-gun welding method applicable to nickel and nickel alloy

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Embodiment

[0009] Embodiment: During the automatic welding of nickel and nickel alloy medium and thick plates or tubes, the plasma and TIG double-gun welding method is adopted. According to the welding direction, the plasma welding torch 1 is fixed in front, and the TIG welding torch 2 is behind. The distance between the two guns is adjustable, corresponding to nickel And the distance L between the tungsten electrode of nickel alloy ion welding torch 1 and the tungsten electrode of TIG welding torch 2 is selected as 60-150mm. The welding waste heat after plasma welding can reduce energy for the back TIG welding cover surface, and the high temperature of the molten pool stays for a long time, eliminating nickel and Nickel alloys have welding defects such as undercuts and pores due to poor fluidity of the molten pool, which increases the welding speed and improves production efficiency. When the distance between the two guns is less than 60mm, the heat input of plasma welding and TIG weldin...

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Abstract

The invention discloses a plasma and TIG double-gun welding method applicable to nickel and a nickel alloy and aims at eliminating defects of gas holes, undercuts and incomplete fusion produced during welding of the nickel and the nickel alloy and improving the quality of nickel and nickel alloy welding connectors. Relative to the automatic walking direction of a nickel and nickel alloy cut deal or pipe (3), a plasma welding gun (1) and a TIG welding gun (2) are fixed, the plasma welding gun (1) is in front of the TIG welding gun (2), and the distance (L) between a tungsten electrode of the plasma welding gun (1) and a tungsten electrode of the TIG welding gun (2) is larger than 60 mm.

Description

technical field [0001] The invention relates to the welding technology of nickel and nickel alloy. Background technique [0002] Nickel and nickel alloys have a high melting point, good mechanical properties, cold and hot pressure processing performance, and excellent corrosion resistance. They are the best materials for corrosion resistance to heat concentrated alkali solutions. construction industry. Pure nickel has low thermal conductivity, poor fluidity, small solid-liquid phase temperature range, and defects such as pores, undercuts, and lack of fusion are prone to occur during welding. The plasma welding method is adopted for the welding of nickel and nickel alloy medium and thick plates or pipes, one-time penetration, one-side welding and double-side forming, high welding efficiency and good weld quality. However, the plasma arc column is thin, and the weld seam formation is sensitive to the neutrality of the arc. The plasma torch must be strictly aligned with the w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K28/02
CPCB23K28/02
Inventor 王希靖陈克选张昌青柴廷玺魏万奎张金银
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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