Low-alloy steel pipe welding process

A welding process and low alloy steel technology, applied in welding equipment, metal processing equipment, manufacturing tools, etc., can solve the problems of poor welding quality, difficult to control heat input, poor mechanical properties, etc., to improve mechanical properties, strict parameters Reasonable control and reduction of welding stress and deformation effect

Inactive Publication Date: 2016-10-05
重庆金亚模具制造有限公司
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Problems solved by technology

To a certain extent, traditional welding methods can no longer meet the requirements of continuously improving welding quality and production efficiency. When using traditional welding method

Method used

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Example Embodiment

[0016] In the following, the present invention will be further described in conjunction with the embodiments, and the operation steps are as follows:

[0017] A low-alloy steel pipeline welding process, the process includes the following steps:

[0018] a. Welding operation process: groove confirmation → cleaning on both sides of groove → group butt weld → spot welding → bottom welding → cleaning spatter welding slag → layered fill welding → cover welding → removal of weld roots → cover welding →Clean up spatter welding slag→Pass the self-inspection appearance inspection→Mark and clean up→Non-destructive testing and cleaning→Rework→Non-destructive testing and cleaning;

[0019] b. Welding process and requirements:

[0020] (1) Preparation of welding materials: E5015 is selected as the electrode material; the diameter of the electrode is Φ2.5-3mm, and the current is 70-90A

[0021] (2) The drying temperature of the electrode is 250-300℃, and the baking time is 2-3 hours;

[0022] (3) Che...

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Abstract

The invention discloses a low-alloy steel pipe welding process, characterized by comprising a welding process including the following steps: confirming a groove, clearing two sides of the groove, group seaming, tack welding, back welding, clearing welding splatters, fill welding in layers, cosmetically welding, clearing weld roots, cosmetically welding, clearing welding splatters, auto-checking appearance for qualification, stamping numbers and clearing, nondestructively detecting and clearing, repairing, and nondestructively detecting and clearing; the low-alloy steel pipe welding process of the invention enables strict and reasonable control for parameters of various process stages, the flow is standardized, welding stress and deformation are decreased, and therefore mechanical properties of a welded pipe are improved.

Description

technical field [0001] The invention belongs to the field of welding technology, in particular to a low-alloy steel pipeline welding technology. Background technique [0002] Low alloy steel has the characteristics of high strength, high toughness and good comprehensive performance, and has been widely used in the industrial field. As we all know, the wide application of any metal structural material not only depends on its own performance characteristics, but also depends on the progress of welding technology. At present, traditional welding methods such as submerged arc welding and gas shielded arc welding are mainly used for welding low alloy steel. Defects and low welding production efficiency. With the advancement of science and technology and the development of the national economy, higher requirements are put forward for the welding quality, production efficiency and product quality of low alloy steel. To a certain extent, traditional welding methods can no longer ...

Claims

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Application Information

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IPC IPC(8): B23K9/02B23K9/235B23K9/23
Inventor 罗灿
Owner 重庆金亚模具制造有限公司
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