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Q460 steel thick plate welding process

A welding process and workpiece technology, applied in the field of welding process of Q460 steel thick plate, can solve the problems of high requirements for preheating and interlayer temperature control, easy to produce welding cracks, large hardening tendency, etc., and achieve good mechanical properties of the workpiece, The effect of small welding residual stress and small heat-affected zone

Inactive Publication Date: 2014-12-17
WUHAN YIYE STEEL STRUCTURE
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Problems solved by technology

Compared with ordinary low-alloy high-strength steel, this steel has the characteristics of high carbon equivalent, large hardening tendency, high requirements for preheating and interlayer temperature control, and is more prone to defects such as welding cracks. If the welding process is not properly controlled, it is very easy to produce large welding stress and welding deformation

Method used

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  • Q460 steel thick plate welding process
  • Q460 steel thick plate welding process
  • Q460 steel thick plate welding process

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Embodiment Construction

[0029] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0030] The invention proposes a welding process for Q460 steel thick plates.

[0031] refer to figure 1 , figure 1 It is a schematic flow chart of a preferred embodiment of the welding process of Q460 steel thick plate in the present invention.

[0032] In this preferred embodiment, a welding process of Q460 steel thick plate comprises the following steps:

[0033] Step S10, cutting the top and bottom ends of the side surfaces of the Q460 steel workpieces to be welded, so that the paired two workpieces are butted to form two asymmetrical double V-shaped grooves [when the workpieces are pair-welded (that is, two to-be-welded Welded Q460 steel workpieces are aligned) to form asymmetric double V-shaped grooves], the single-side groove angle of the workpiece is 20~22°, and the cut grooves are polished;

[0034] Step S...

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Abstract

The invention discloses a Q460 steel thick plate welding process, which comprises the following steps that the top end and the bottom end of the side surface of a Q460 steel workpiece to be welded are cut, so that two workpieces are in butt joint for forming two asymmetric double-V-shaped grooves; the ground workpieces are subjected to pairing welding; welding seam regions are preheated; the preheated workpieces are subjected to priming layer, filling layer and cover surface layer welding by a multilayer multi-pass and narrow-gap thin layer welding method; carbon arc air gouging is adopted for back chipping processing, and back defects can be totally chipped in the back chipping process. The Q460 steel thick plate welding process disclosed by the invention has the advantages that the welding quality of a Q460 steel thick plate is improved, and the generation of welding stress and welding deformation is reduced.

Description

technical field [0001] The invention relates to the technical field of welding process control, in particular to a welding process for Q460 steel thick plates. Background technique [0002] Q460GJC steel is a low-alloy high-strength high-rise building structural steel, which is widely used in high-rise buildings. Compared with ordinary low-alloy high-strength steel, this steel has the characteristics of high carbon equivalent, large hardening tendency, high requirements for preheating and interlayer temperature control, and is more prone to defects such as welding cracks, and Q460GJC steel thick plate in the welding process, If the welding process is not properly controlled, it is very easy to produce large welding stress and welding deformation. Therefore, choosing the best welding process parameters and formulating reasonable technical requirements to effectively eliminate welding defects, so as to obtain high-quality welds and stable welding structures is the focus of Q4...

Claims

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Application Information

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IPC IPC(8): B23K9/025B23K9/16B23K9/235
CPCB23K9/025B23K9/013B23K9/16B23K9/235B23K33/00B23K2101/185B23K2103/04
Inventor 白晓良杨汉斌唐谱洪莫志林徐幼清吴勇刚王静隋陆
Owner WUHAN YIYE STEEL STRUCTURE
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