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Titanium pipeline argon arc welding process method

A technology of argon arc welding and process method, which is applied in welding equipment, welding accessories, arc welding equipment and other directions, can solve the problems of easy generation of cracks, pores and surface oxidation, low strength, plasticity and toughness of welded joints, etc., and achieves easy grinding and removal. , The effect of protecting health and smooth arc ignition

Inactive Publication Date: 2014-11-05
CHINA NAT CHEM ENG NO 14 CONSTR
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the strength, plasticity and toughness of the welded joint are low during the welding process of titanium pipes, and defects such as cracks, pores and surface oxidation are easily produced

Method used

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Embodiment Construction

[0024] like figure 1 As shown, the titanium pipeline argon arc welding process method of the present invention comprises the following steps:

[0025] Step 1. Before starting welding, first use a vertical milling cutter to bevel the welding surface of the titanium pipe, and use a vertical milling cutter to process the bevel, which can avoid the angle grinder, lathe, and high-speed beveling machine. The over-burning phenomenon formed when the groove is formed, and then the joints are assembled on the groove, and the upper part of the groove is spot-fixed to form a bridge-type spot-fixed weld. Since the traditional spot-fixed welding is used, the shielding gas protects the spot-fixed weld. The effect is not enough (the air ratio around the groove is high at this time), and the spot welding seam is prone to defects such as pores and oxidation, and the bridge spot welding technology of the present invention is adopted, that is, the upper part of the groove is spot welded to form a...

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Abstract

The invention provides a titanium pipeline argon arc welding process method. The process method includes the steps: processing a groove, fixing a welding seam through a bridge-type point, filling argon into a titanium pipe, using an aluminum foil to close the welding seam, filling argon into a dragging cover, controlling welding parameters, and feeding argon in a delayed manner during arc extinguishing. By the process method, strength, plasticity and tenacity of a welding joint can be improved effectively, and the defects of generation of cracks and air holes and surface oxidation at the welding seam can be prevented.

Description

technical field [0001] The invention relates to a welding process method, in particular to a welding process method for argon arc welding of titanium pipes. Background technique [0002] Argon is a very chemically inactive noble gas. When the titanium pipe is welded, it is used as a protective gas to isolate the titanium from contact with the air around the welded joint area, especially to prevent the oxidation of the welded joint of the titanium pipe at a high temperature above 400 °C. The use of protective gas outer drag cover effectively avoids the oxidation of the outer surface of the weld metal at high temperature. [0003] Titanium is a silver-white non-magnetic metal with light specific gravity, good plasticity and toughness, good heat resistance and unique corrosion resistance. In the increasingly developing petroleum and chemical projects, industrial pure titanium is mostly used to make special high-temperature corrosion-resistant containers, pipes and components....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/16B23K9/235B23K9/32B23K101/06B23K103/14
CPCB23K9/16B23K9/0282B23K9/235B23K9/32B23K2103/14
Inventor 崔定龙胡秋英林传友陈本富
Owner CHINA NAT CHEM ENG NO 14 CONSTR
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