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High-strength steel welding process

A welding process and high-strength steel technology, applied in welding equipment, manufacturing tools, arc welding equipment, etc., can solve problems such as poor mechanical properties, difficult control of heat input, poor welding quality, etc., to achieve strict and reasonable control of parameters, improve Mechanical properties, effects of process specifications

Inactive Publication Date: 2016-10-05
重庆展申机械厂
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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 methods to weld stainless steel pipes into one body, the heat input is not easy to control, which will easily lead to poor welding quality of the product, and then mechanical properties. Difference

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Embodiment Construction

[0015] Below in conjunction with embodiment the present invention will be further described, and its operating steps are as follows:

[0016] A high-strength steel welding process is aimed at flat butt welding of high-strength steel plates with a base metal of Q420 and a thickness of 6mm, including the following process parameters and steps:

[0017] (1) Preparatory work: Before the weldment is assembled, the scale, oil, rust and other sundries in the groove and on both sides within the range of 10-15mm should be thoroughly removed until the metallic luster is exposed.

[0018] (2) Welding groove: V-shaped groove is adopted, the butt groove angle is 60-70°, the penetration depth is 3-4mm, the front fusion width is 3-6mm, the back fusion width is 2-3mm, and the front reinforcement height is 0.5-1mm. Residue height of back 0.5~1mm;

[0019] (3) Preheating temperature: start welding when the preheating temperature reaches 200-250°C;

[0020] (4) Welding temperature: during weld...

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Abstract

The invention discloses a high-strength steel welding process. The high-strength steel welding process is characterized in that the high-strength steel welding process aiming at downhand butt welding of high-strength steel plates with base metal being Q420 and thickness being 6mm includes process parameters and steps: (1) preparation; (2) welding grooves; (3) preheating temperature; (4) welding temperature; (5) shielding gas; (6) welding sequence; (7) welding materials; (8) welding parameters. The high-strength steel welding process has advantages of strict and reasonable control of parameters of each stage, normative procedures, reduction of welding stress and deformation and improvement of mechanical properties after welding.

Description

technical field [0001] The invention belongs to the field of welding technology, in particular to a high-strength steel welding technology. Background technique [0002] High-strength steel has the characteristics of high strength, high toughness and good comprehensive performance, and has been widely used in industrial fields. 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 high-strength steel welding. 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 high-strength steel. To a certain extent, traditional welding methods can no lon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/16B23K9/23B23K9/235
Inventor 赵伟
Owner 重庆展申机械厂
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