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Friction stir welding method with controllable transition layer on the joint surface of metal composite plates

A metal clad plate and friction stir technology, which is applied in welding equipment, metal processing equipment, non-electric welding equipment, etc., can solve the problems of difficulty in ensuring that the pre-filled welding wire does not move relative to each other, poor controllability, etc., and achieves easy operation and feasibility. strong effect

Active Publication Date: 2016-07-06
NANJING UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The purpose of this invention is to control the mixing problem in the transition zone of the composite plate, but in the actual welding process, due to the force of the stirring needle, it is difficult to ensure that the pre-filled welding wire in the groove does not move relative to each other, so its controllability is poor

Method used

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  • Friction stir welding method with controllable transition layer on the joint surface of metal composite plates
  • Friction stir welding method with controllable transition layer on the joint surface of metal composite plates
  • Friction stir welding method with controllable transition layer on the joint surface of metal composite plates

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] combine Figure 4 and Figure 10 , a single-shoulder stirring head with a controllable transition layer on the joint surface of a metal composite plate, comprising a clamping end 1, a shoulder 2 and a stirring pin 3, one end of the shoulder 2 is connected to the clamping end 1, and the other end is connected to the stirring pin 3 To connect, an annular protrusion 4 is provided along the circumference of the stirring needle 3 . The stirring needle 3 between the shaft shoulder 2 and the annular protrusion 4 is gradually expanding from the shaft shoulder 2 to the direction of the annular protrusion 4, and the whole stirring head is manufactured in one piece. The other end of the clamping end 1 is fixed on the main shaft of the friction stir welding machine.

[0045] The connection between the above-mentioned annular protrusion 4 and the stirring needle 3 is a circular arc transition.

[0046] Taking the welding of double-layer metal composite plates as an example, the f...

Embodiment 2

[0052] combine Figure 5 , a single-shoulder stirring head with a controllable transition layer on the joint surface of a metal composite plate, comprising a clamping end 1, a shoulder 2 and a stirring pin 3, one end of the shoulder 2 is connected to the clamping end 1, and the other end is connected to the stirring pin 3 To connect, an annular protrusion 4 is provided along the circumference of the stirring needle 3 . The stirring needle 3 between the shaft shoulder 2 and the annular protrusion 4 is tapered in shape from the shaft shoulder 2 to the direction of the annular protrusion 4, and the whole stirring head is manufactured in one piece. The other end of the clamping end (1) is fixed on the main shaft of the friction stir welding machine.

[0053] The connection between the above-mentioned annular protrusion 4 and the stirring needle 3 is a circular arc transition.

[0054] Taking the welding of double-layer metal composite plates as an example, the friction stir weld...

Embodiment 3

[0060] combine Figure 6 , a single-shoulder stirring head with controllable transition layer on the joint surface of a metal composite plate, comprising a clamping end 1, a shoulder 2 and a stirring pin 3, one end of the shoulder 2 is welded to the clamping end 1, and the other end is connected to the stirring pin 3 For welding, two annular protrusions 4 are arranged along the circumference of the stirring needle 3 . The shape of the stirring needle 3 between the shoulder 2 and the annular protrusion 4 closest to the shoulder 2 is cylindrical. The other end of the clamping end 1 is fixed on the main shaft of the friction stir welding machine.

[0061] The connection between the above-mentioned annular protrusion 4 and the stirring needle 3 is a circular arc transition.

[0062] Taking the welding of three-layer metal composite plates as an example, the friction stir welding method with controllable transition layer on the butt joint surface of metal composite plates is as f...

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Abstract

The invention discloses a friction-stir welding method allowing a transitional layer between butt faces of metal composite plates to be under control. The transitional layer between the butt faces of the metal composite plates is controlled during the welding process through stirring heads for friction-stir welding; the stirring heads include a single-shoulder stirring head and a double-shoulder stirring head; flowing behavior of plasticized metal at a junction of the metal composite plates is controlled to allow laminar flowing for the junction; different metal atoms between base plates and clad plates of the composite plates in welded connectors are avoided forming a brittle phase by mutual dispersion, and the composite plates are directly formed by friction-stir welding; the problems such that dissimilar materials on upper and lower junction faces of the composite plates suffer great mixed embrittling and even cracking are effectively solved, and the requirement for long-term usage of the welded connectors of the composite plates is met.

Description

technical field [0001] The invention belongs to welding technology, in particular to a friction stir welding method with a controllable transition layer on the butt joint surface of metal composite plates. Background technique [0002] As a material with greater flexibility in terms of physical properties, mechanical properties, and connection performance, dissimilar metal composite panels have a wide range of applications, but when forming dissimilar metal composite panels, their welding methods will be greatly affected. limited. When using the general fusion welding method to weld the clad plate, the uneven heat input will lead to certain deformation, and at the same time, it will make the joint surface of the clad plate form a large intermetallic compound transition layer, thus affecting the performance of the dissimilar metal clad plate. [0003] Friction stir welding is a solid-state plasticized connection technology. Since its inception, friction stir welding has been...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K20/12
CPCB23K20/122
Inventor 周琦陶娟王克鸿朱军彭勇杨立夏浩周红云孙宏宇蔡雅君
Owner NANJING UNIV OF SCI & TECH
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