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Step-by-step electron beam fusion welding and laser shock peening composite manufacturing device and method

A technology of laser shock strengthening and manufacturing equipment, which is applied in the direction of electron beam welding equipment, manufacturing tools, welding equipment, etc., can solve the problems of low strength, tensile and fatigue properties, and low mechanical properties of welds, so as to solve the problem of fatigue performance decline , High power density, small effect range

Pending Publication Date: 2021-07-16
BEIHANG UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

However, it has the disadvantages of low mechanical properties of the weld, and lower strength, tensile and fatigue properties than the welding base metal.

Method used

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  • Step-by-step electron beam fusion welding and laser shock peening composite manufacturing device and method
  • Step-by-step electron beam fusion welding and laser shock peening composite manufacturing device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0069] see attached figure 2 , The material of this example is austenitic stainless steel 316L and Incoloy825 nickel-based superalloy dissimilar plates, the plate size is the same as 120mm*150mm*32mm, the sample is subjected to mechanical grinding and acetone cleaning. After the preparation work is completed, the specific implementation steps are as follows :

[0070] (1) Turn on the power supply of the whole device and the computer 5, and check the connection and operation of each equipment to ensure normal operation. The electron beam welding machine is started and preheated for about half an hour, and the electron beam welding manufacturing process parameters and laser shock strengthening process parameters are set. .

[0071] (2) Vacuuming, and the welding process is realized by an electron beam welding machine. The main process parameters of the electron beam welding are: the welding acceleration voltage is 85kV, the electron beam current is 165mA, and the electron gun ...

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Abstract

The invention discloses a step-by-step electron beam fusion welding and laser shock peening composite manufacturing device and method. The device comprises a workbench; a base plate is fixed to the top face of the workbench; a welding table and a peening table are fixed on the top surface of the base plate; a vacuum welding chamber is fixed to the base plate and covers the welding table; an electron beam machining assembly is used for emitting electron beams to the welding table; a laser beam machining assembly is used for emitting laser beams to the peening table; and a computer is used for controlling the electron beam machining assembly to emit the electron beams to a welding part and controlling the laser beam machining assembly to emit the laser beams to peen the welding part subjected to electron beam welding when the vacuum welding chamber is in a vacuum state. The residual tensile stress generated by a welding seam formed in the electron beam welding process can be eliminated, the crack tendency is remarkably reduced, the problem that the fatigue performance is reduced due to the traditional welding seam residual tensile stress is effectively solved, the influence of welding seam defects on the product performance is restrained, and the device and the method are suitable for preparing high-reliability welding parts.

Description

technical field [0001] The invention relates to the technical field of electron beam welding and laser shock strengthening, and more particularly to a step-by-step electron beam fusion welding and laser shock strengthening composite manufacturing device and method. Background technique [0002] Electron beam welding (EBW) is to use the electrons generated by the cathode in the electron gun to be pulled out under the action of a high-voltage (25-300kV) accelerating electric field between the cathode and anode, and accelerated to a very high speed (0.3-0.7 times the speed of light). After the primary or secondary magnetic lens is focused, a dense high-speed electron flow is formed. When it hits the seam of the workpiece, its kinetic energy is converted into heat energy, and the material is rapidly melted to achieve the purpose of welding. In fact, the penetration ability of high-speed electrons in metals is very weak, for example, only 0.025mm can be penetrated under an accele...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K15/06B23K15/00C21D10/00
CPCB23K15/0046B23K15/06C21D10/005
Inventor 郭伟王优朱颖张宏强
Owner BEIHANG UNIV
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