A friction stir welded integral wall plate and its production method

A friction stir welding and integral siding technology, which is applied in welding equipment, non-electric welding equipment, metal processing equipment, etc., can solve the problems affecting the mechanical properties and corrosion resistance of aluminum alloy siding, cracks, and easy occurrence of pores. Excellent mechanical properties and corrosion resistance, the effect of optimizing welding parameters

Active Publication Date: 2021-12-03
BEIJING ALUMIP DEVING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the welding of aluminum alloy hulls in the domestic shipbuilding industry still has problems such as porosity and cracks during welding, which affect the mechanical properties and corrosion resistance of the produced aluminum alloy panels.

Method used

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  • A friction stir welded integral wall plate and its production method
  • A friction stir welded integral wall plate and its production method
  • A friction stir welded integral wall plate and its production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Embodiment 1 of the present invention provides a production method of a friction stir welded integral wall plate, comprising the following steps:

[0062] (1) Plate pretreatment: Before friction stir welding, the 5E61 ribbed plate is subjected to stabilization heat treatment, followed by intermediate annealing → flattening, straightening → stabilization annealing operations.

[0063] Intermediate annealing, annealing at a temperature of 280-425°C for 5-10 hours; after the temperature drops below 50°C, flatten and straighten it, and control the stretching rate at 0.5-1.0%, if necessary, carry out secondary stretching , the cumulative elongation rate shall not exceed 1.5%; the 5E61 ribbed sheet shall be annealed at 450-510°C for 12-24 hours. The pretreatment conditions are shown in Table 1.

[0064] Table 1 Samples prepared under different pretreatment conditions

[0065]

[0066] (2) Friction stir welding: Align and fix the pretreated 5E61 ribbed plates in the lengt...

Embodiment 2

[0075] The preparation method is the same as that of sample SE3 in Example 1, except that this example involves the influence of welding parameters on the mechanical properties of the friction stir welded integral wall plate. The different welding parameters are shown in Table 4, and the mechanical properties of the friction stir welded monolithic panels prepared under different welding parameters are shown in Table 5. The mechanical properties of the overall panel are shown in Table 6.

[0076] Table 4 Different welding parameters

[0077] craft mixing head Speed(r / min) Welding speed (mm / min) Craft one double helix 1000 800 Craft Two triple helix 1000 600 Craft Three double helix 1000 700 Craft Four double helix 800 600 Craft five single ring 1100 400

[0078] Table 5 Mechanical properties of friction stir welded monolithic panels prepared under different welding parameters

[0079]

[0080]

[0081] Tab...

Embodiment 3

[0085] The preparation method is the same as that of sample SE3 in Example 1, the difference is that this example studies the influence of different welding processes on the mechanical properties of the overall wall plate, and the results are shown in Table 7.

[0086] Table 7 Effects of different welding processes on the mechanical properties of integral panels

[0087]

[0088]

[0089] Table 7 shows that the tensile strength of the integral wall plate prepared by the friction stir welding process is significantly better than that of the automatic TIG flat welding integral wall plate.

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Abstract

The invention discloses a friction stir welding integral wall plate and a production method thereof. The friction stir welding integral wall plate of the invention is pretreated before welding to improve the corrosion resistance of the product. At the same time, through the optimization of the welding process, the structure of the stirring head and the welding parameters, etc., the friction stir welded integral wall plate prepared by the present invention has good mechanical properties and corrosion resistance, and its tensile strength can reach 384MPa, and the yield strength is 277MPa , the elongation rate is 14%, and there is no cracking when bending 180°, and the mass loss due to intergranular corrosion is not more than 3mg / cm 2 , Anti-exfoliation corrosion above PB level.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy profiles for ship hulls, and in particular relates to a friction stir welded integral wall plate and a production method thereof. Background technique [0002] The traditional connection methods of aluminum alloy materials are rivet connection and arc welding connection. Rivet connection increases the manufacturing time, manpower and material consumption, while aluminum alloy fusion welding is prone to deformation, defects and smoke, which also limits the use of arc welding. Use on aluminum alloy components. Based on the great advantages of friction stir welding in welding methods, mechanical properties, manufacturing costs and environmental protection, more and more technicians at home and abroad have begun to study the application of friction stir welding in aluminum alloy welding. [0003] Aluminum alloy hull welding is a thorny problem in the domestic shipbuilding industry. The shipbui...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K20/12B23K20/24
CPCB23K20/122B23K20/24
Inventor 郭锴吴海涛
Owner BEIJING ALUMIP DEVING
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