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Downward and butt welding process for high strength steel for ship structure

A technology for structural steel and welding technology, applied in welding equipment, manufacturing tools, arc welding equipment, etc., can solve the problems of immature application and small proportion, and achieve the effect of saving raw materials, reducing production costs, and improving labor efficiency

Active Publication Date: 2011-04-13
WUCHANG SHIPBUILDING IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In China, the application range of high-strength steel is also gradually increasing, but the overall application is still immature, accounting for only about 10% of the total steel consumption, a small proportion

Method used

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  • Downward and butt welding process for high strength steel for ship structure
  • Downward and butt welding process for high strength steel for ship structure
  • Downward and butt welding process for high strength steel for ship structure

Examples

Experimental program
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Effect test

Embodiment 1

[0050] Using submerged arc automatic welding:

[0051] 1. The welding materials are as follows: welding wire H08Mn2EΦ5mm, flux CHF101

[0052] 2. Welding sequence and groove size such as figure 2 shown in figure 1 The double V-shaped groove on the foundation has a front fusion width of 60-62mm, a back fusion width of 50-52mm, a penetration depth of 100mm, and a residual height of 0-2mm; this type of groove can save more welding materials, electric energy and It is easy to process, can effectively reduce welding deformation, and has good weldability.

[0053] 3. The welding specification parameters are shown in the following table 1:

[0054] Table 1 Submerged arc automatic welding

[0055]

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Abstract

The invention in particular relates to a welding process for super thick high strength steel plates for ships and provides a downward and butt welding process aiming at downward and butt welding of EH36Z 100mm-thick high strength steel plates for a ship structure. By putting forward effective specifications for welding grooves, weld preheating, welding temperature, welding sequence, welding variables and cold treatment after welding, the welding process of the high strength steel for super thick plates can be smoothly implemented; and by using the welding process, the labor efficiency is improved, the raw materials is saved, the production cost is reduced, the ship building period is shortened, large scale practical application of the steel to the engineering is successfully implemented for the first time and the gap in the technical specifications in welding of the EH36Z 100mm-thick high strength steel for thick plates for the ship structure at home is filled in.

Description

technical field [0001] The invention particularly relates to a welding process for high-strength steel for ships. Background technique [0002] Welding technology is one of the key technologies of modern shipbuilding engineering, and the quality of ship welding in hull construction is an important indicator for evaluating shipbuilding quality. Therefore, the advancement of welding technology is of great significance to promote the development of shipbuilding production. Internationally, high-strength steel welding technology has developed rapidly in terms of welding material composition and process design, and its application fields are also expanding. In the field of steel structure manufacturing involving special requirements or harsh working conditions, high-strength steel occupies an increasingly important position and has been widely used in ships, bridges, automobiles, high-rise building construction and other fields. In China, the application range of high-strength ...

Claims

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Application Information

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IPC IPC(8): B23K9/18B23K9/235
Inventor 严俊蔡钿王宇李绍燕魏建平梁天山黄丽
Owner WUCHANG SHIPBUILDING IND
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