Novel welding method for laser welding of magnesium alloy

A technology of laser welding and welding method, which is applied to laser welding equipment, welding/welding/cutting items, welding equipment and other directions, can solve the problems of limiting the application of laser welding technology, low utilization rate of laser welding energy, and increasing equipment cost. The effect of improving energy utilization, improving mechanical properties, and increasing energy transmission efficiency

Active Publication Date: 2012-08-01
CMCU ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This is due to the high reflectivity of the surface of the magnesium alloy to the laser beam and the low energy utilization rate of laser welding, which lead to a sharp increase in the cost...

Method used

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  • Novel welding method for laser welding of magnesium alloy
  • Novel welding method for laser welding of magnesium alloy
  • Novel welding method for laser welding of magnesium alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] figure 1 It is a schematic diagram of magnesium alloy laser welding using the method of the present invention. As shown in the figure, the novel welding method for magnesium alloy laser welding in this embodiment includes the following steps:

[0025] 1) Fully grind SiO first 2 Activator powder, then to SiO 2 Add acetone to the active agent powder to make it into a paste; grind and clean the surface of the magnesium alloy to be welded with ethanol to remove oxides and oil stains;

[0026] 2) Use a flat brush to shake the paste SiO 2 The active agent is evenly coated on the surface of the magnesium alloy to be welded to form SiO 2 active agent coating ( figure 1 Among them, 1 is magnesium alloy, 2 is SiO 2 active agent coating); the paste SiO 2 The coating amount per unit area of ​​the active agent on the surface of the magnesium alloy to be welded is 1 mg / cm 2 , the paste SiO 2 The coating width of the active agent on the surface of the magnesium alloy to be wel...

Embodiment 2

[0031] The difference between the novel welding method for magnesium alloy laser welding of this embodiment and embodiment 1 is only that: the paste SiO 2 The coating amount per unit area of ​​the active agent on the surface of the magnesium alloy to be welded is 2mg / cm 2 .

Embodiment 3

[0033] The difference between the novel welding method for magnesium alloy laser welding of this embodiment and embodiment 1 is only that: the paste SiO 2 The coating amount per unit area of ​​the active agent on the surface of the magnesium alloy to be welded is 3mg / cm 2 .

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Abstract

The invention discloses a novel welding method for the laser welding of a magnesium alloy. The method comprises the following steps of: adding an organic solvent into SiO2 active agent powder to form paste; coating the pasty SiO2 active agent on the surface of a part to be welded of the magnesium alloy uniformly to form a SiO2 active agent coating; and performing laser welding after the organic solvent in the SiO2 active agent coating is violated. By the method, due to high absorption capacity and low reflectivity of the SiO2 active agent coating for a laser beam, the loss rate of laser energy is reduced, the transmission efficiency of the energy is increased, and the energy utilization rate of the laser beam is remarkably improved; the energy utilization rate of the laser beam is remarkably improved, so that the fusion depth of a welding seam is remarkably increased, and the mechanical property of a welding joint can be obviously improved; and simultaneously, a low-power laser welding process can be utilized, so that the welding cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of laser welding, and in particular relates to a novel welding method for laser welding of magnesium alloys. Background technique [0002] Magnesium alloy has a series of advantages such as low density, high specific strength, good electromagnetic shielding and easy recycling. It is called the green engineering material of the 21st century and is widely used in transportation, consumer electronics, national defense and aerospace. and other fields. China, the United States, Japan and the European Union regard the research and application of light metals represented by magnesium alloys as the key to maintaining cutting-edge advantages in the new century. With the rapid development of the automobile industry, the continuous improvement of energy saving and consumption reduction requirements, and the increasingly stringent safety and environmental protection regulations, the requirements for automobile lightwei...

Claims

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Application Information

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IPC IPC(8): B23K26/18B23K26/32B23K103/08B23K26/322
Inventor 王林志
Owner CMCU ENG
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