Laser welding method for amorphous matrix material

A technology for laser welding and amorphous substrates, applied in laser welding equipment, welding equipment, metal processing equipment, etc., can solve the problems of difficult welding of amorphous substrates and stainless steel, high equipment requirements, etc., achieve high welding strength and reduce equipment requirements, the effect of expanding the field of use

Active Publication Date: 2012-05-02
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention solves the technical problems existing in the prior art that it is difficult to weld the amorphous base ma...

Method used

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  • Laser welding method for amorphous matrix material
  • Laser welding method for amorphous matrix material
  • Laser welding method for amorphous matrix material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Butt two amorphous alloys with a thickness of 1.5mm, and the width of the joint is 6mm. Under the protection of argon, the laser equipment PB300 is used to set the square wave pulse to radiate at the joint of the two amorphous alloys, and the two amorphous alloys are connected. Welding, welding conditions include: laser power 1.4KW, spot diameter 0.27mm, light output frequency 8Hz, argon gas pressure 0.15MPa, argon flow rate 10mL / min, pulse laser moving speed 8mm / s, single The pulse width of the pulse is 3.5ms.

Embodiment 2

[0035] Two pieces of amorphous alloys were butt welded using the same method as in Example 1, except that the moving speed of the pulsed laser was 15 mm / s, and the duration of a single pulse was 10 ms.

Embodiment 3

[0037]Lap the stainless steel with a thickness of 0.15mm on the amorphous alloy with a thickness of 1.5mm. Under the protection of nitrogen, use the laser equipment PB300 to set the square wave pulse to aim at the surface of the stainless steel for radiation, and perform lap spot welding of the stainless steel and the amorphous alloy. The conditions include: the laser power is 2KW, the spot diameter is 0.64mm, the light output frequency is 8Hz, the nitrogen gas pressure is 0.15MPa, the nitrogen gas flow rate is 10mL / min, the pulse width of a single pulse is 8ms, and the number of solder joints is 4.

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Abstract

The invention provides a laser welding method for an amorphous matrix material. The laser welding method comprises the following step of welding a weldment on a matrix material to be welded by using pulse laser under the protection of inert atmosphere, wherein the matrix material to be welded is amorphous alloy, and the weldment is amorphous alloy or stainless steel; and the welding conditions are as follows: the laser power is 1-6.5 kW, the spot diameter is 0.1-1.0 mm, the laser emitting frequency is 1-20 Hz, the gas pressure of the inert atmosphere is 0.1-1 MPa, and the gas flow of the inert atmosphere is 1-15 mL/min. The laser welding method for the amorphous matrix material, provided by the invention, not only can be used for welding among amorphous alloys, but also can be used for welding between the amorphous alloy and stainless steel. No obvious crystallization phenomenon occurs before and after welding, and the welding strength is higher.

Description

technical field [0001] The invention belongs to the field of laser welding, in particular to a laser welding method for an amorphous substrate. Background technique [0002] Amorphous alloy is a metastable material, and it is easy to change to a more stable crystalline state under the influence of external high temperature. Therefore, the temperature should not be too high during amorphous welding, and the welding speed must be fast, and it must be carried out under the protection of inert gas. In order to avoid oxidation and overheating lead to the transformation of amorphous into crystal. Therefore, conventional welding methods, such as energy storage welding, friction welding, resistance welding, etc., are not suitable for welding amorphous materials. The welding of amorphous substrates has become a technical difficulty in the expansion of the application of amorphous materials. [0003] Disclosed in CN1386605A is a resistance welding method for zirconium-based amorphou...

Claims

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Application Information

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IPC IPC(8): B23K26/40B23K26/12B23K26/22
Inventor 刘利强李运春张法亮
Owner BYD CO LTD
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