Method for welding between metal plates

A welding method and technology for metal plates, applied in the welding process and the field of welding between metal plates, can solve the problems of high equipment dependence and troublesome experiments, and achieve the effect of solving insufficient heat input

Active Publication Date: 2019-12-20
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method is highly dependent on equipment, and the experiment is more troublesome

Method used

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  • Method for welding between metal plates
  • Method for welding between metal plates
  • Method for welding between metal plates

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Select nickel powder with a purity of more than 99.5% and a particle size of 100-200 mesh, aluminum powder with a purity of more than 99% and a particle size of 100-200 mesh, control the powder-to-material ratio of nickel and aluminum to 30:59, and the total amount of mixed powder to be 20g.

[0030] The QM32 planetary ball mill is used for ball milling, stainless steel balls are used as the grinding medium, and the ball-to-material ratio is 10:1. In order to prevent the powder from being oxidized during the ball milling process, the ball mill tank is evacuated and argon is introduced for protection. The ball milling speed is 350-450rpm, and the ball milling time is 35-45h to obtain nickel-aluminum mixed powder in a metastable state.

[0031] Friction stir welding lap welding is adopted, and the welding process is determined as follows: rotation speed 700-1500rpm, feed speed 50mm / min, downforce control to 4KN-6KN, stirring needle length is slightly shorter than the upper...

Embodiment 2

[0034] Select nickel powder with a purity of more than 99.5% and a particle size of 100-200 mesh, aluminum powder with a purity of more than 99% and a particle size of 100-200 mesh, and control the powder-to-material ratio of nickel and aluminum to 27:59.

[0035] The QM32 planetary ball mill is used for ball milling, stainless steel balls are used as the grinding medium, and the ball-to-material ratio is 10:1. In order to prevent the powder from being oxidized during the ball milling process, the ball mill tank is evacuated and argon is introduced for protection. The ball milling speed is 350-450rpm, the ball milling time is 35-45h, and the nickel-aluminum mixed powder in a metastable state is obtained.

[0036] image 3 It is a graph of XRD detection results of ball milling at different times in Example 2 of the present invention; it can be seen from the figure that the mixed powder has not reacted after ball milling for 35-45 hours, and the mixed powder has reacted to form ...

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Abstract

The invention belongs to the field of welding, and relates to a process for welding between same metal plates or dissimilar metal plates, in particular to a method for welding between the metal plates. The method for welding between the metal plates comprises the following steps that, after the first metal plate and the second metal plate are in overlapped lap joint or butt joint, a proper amountof metastable self-propagating reaction metal mixed powder is placed at the lap joint or but joint position, welding is carried out, the self-propagating reaction of the metal mixed powder is triggered, and the first metal plate and the second metal plate are welded together with the aid of heat released by the self-propagating reaction. According to the method for welding between the metal plates, a large amount of heat generated during welding is utilized to trigger the metastable self-propagating reaction metal mixed powder for spontaneous reaction, and the first metal plate and the secondmetal plate are bonded together under the action of instantaneous heat released by the self-reaction. The method for welding between the metal plates is especially suitable for welding between the high-melting-point metal plates, and can overcome welding defects such as insufficient heat input of a high-melting-point alloy.

Description

technical field [0001] The invention belongs to the field of welding, and relates to a welding process between metal plates of the same kind or different kinds of metal plates; in particular, it relates to a welding method between metal plates. Background technique [0002] With the continuous development of automobile lightweight, people pay more and more attention to lightweight materials. Magnesium alloys and aluminum alloys not only have good corrosion resistance, but also have the characteristics of high specific strength, and have significant application prospects in the application of lightweight body materials. At present, many people have carried out research on the connection of aluminum-steel, magnesium-aluminum, and magnesium-steel. However, the joint strength is generally not high, and it is difficult to apply it to industrial practice. The research on the connection between the above dissimilar metals mainly focuses on methods such as fusion welding, brazing, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K20/12B23K20/24B23K20/26B23K26/21B23K26/70
CPCB23K20/12B23K20/24B23K20/26B23K26/21B23K26/702
Inventor 胡心彬郑博董仕节周小平赵丽
Owner HUBEI UNIV OF TECH
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