Gas shield device for argon arc welding of titanium material

A technology of argon arc welding and gas shielding, which is used in devices for supplying/removing shielding gas, arc welding equipment, welding equipment, etc., which can solve the problem of blue and gray weld color, uneven gas dispersion, and poor weld pool protection. and other problems, to achieve uniform gas dispersion, increase the number of shunt holes, and good welding effect.
CN107225313APending Publication Date: 2017-10-03NANTONG EXCEL MACHINERY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NANTONG EXCEL MACHINERY
Publication Date
2017-10-03

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Abstract

The invention discloses a gas shield device for argon arc welding of a titanium material. The gas shield device comprises a nozzle, a ceramic nozzle and a contact tube, wherein the nozzle is sleeved with the ceramic nozzle through a thread, one end of the contact tube is fixed in the nozzle, the nozzle is internally provided with eight distribution holes with the contact tube as a center, the distribution holes are arranged into a ring, the end of the nozzle is provided with a protection cover structure internally provided with a cavity, the end of the nozzle is further provided with two 200-mesh stainless steel screens, and the other end of the contact tube extends out of the nozzle. The gas shield device effectively achieves air isolation, gas dispersion is more uniform, airflow is more stable, a better protection effect is achieved, and the welding effect is good.
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Description

technical field

[0001] The invention relates to the field of welding technology, in particular to a gas shielding device for argon arc welding of titanium materials. Background technique

[0002] Titanium has strong chemical activity. When titanium is placed in the air, a dense oxide film can be formed rapidly on its surface. Oxygen reacts violently to form titanium oxides. At higher temperatures, titanium will absorb gaseous elements such as hydrogen and nitrogen in the air, which will eventually reduce the plasticity of titanium and sharply reduce its impact toughness. During the welding process, when molten titanium is exposed to the air, elements such as oxygen, hydrogen, and nitrogen in the air will quickly combine with titanium to form brittle oxides or nitrides, which will sharply reduce the plasticity of the weld metal and improve the impact toughness. When it falls, brittle fracture will occur in severe cases. Therefore, a gas protection device must be used when we...

Claims

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