Gamma-TiAl intermetallic compound laser welding device and method with preheating device

A technology of intermetallic compounds and preheating devices, which is applied in laser welding equipment, welding equipment, metal processing equipment, etc., can solve the problems of easy initiation of cracks in welds, influence on the mechanical properties of welded joints, and less research, so as to reduce the occurrence of cracks The possibility of cracks, the effect of improving mechanical properties and reducing brittleness

Inactive Publication Date: 2020-10-30
HOHAI UNIV CHANGZHOU
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  • Abstract
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  • Application Information

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Problems solved by technology

Due to the room temperature brittleness of the γ-TiAl intermetallic compound, it is easy to initiate cracks in the weld during the welding process, which in turn affects the mechanical properties of t

Method used

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  • Gamma-TiAl intermetallic compound laser welding device and method with preheating device
  • Gamma-TiAl intermetallic compound laser welding device and method with preheating device

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0033] Such as figure 1 As shown, a γ-TiAl intermetallic compound laser welding device with a preheating device, the device includes a preheating device 1, a powder feeding device, a laser 4, a gas protection device 5 and a welding fixture;

[0034] The preheating device is a heating table capable of temperature control, the powder feeding device is composed of an argon gas bottle, a scraper type powder feeder and a coaxial powder feeding head, the scraper type powder feeder 2 and the argon gas bottle 10, The coaxial powder feeding heads 3 are connected to each other in turn; the welding fixture includes a fixed support 6, a threaded rod 7 and a gasket 8, the fixed support is clamped on the hea...

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Abstract

The invention discloses a gamma-TiAl intermetallic compound laser welding device and method with a preheating device. The device comprises the preheating device, a powder feeding device, a laser device, a gas protection device and a welding clamp, wherein the preheating device is a heating table capable of achieving temperature control, the powder feeding device consists of an argon bottle, a scraper type powder feeder and a coaxial powder feeding head, and the argon bottle, the scraper type powder feeder and the coaxial powder feeding head are sequentially connected with one another; the welding clamp comprises a fixed support, a threaded rod and a gasket, the fixed support is clamped on the heating table, the threaded rod penetrates through the fixed support, the lower end of the threaded rod is connected with the gasket, and a to-be-welded sample is placed between the gasket and the table top of the heating table; a closed hood is arranged above the heating table, the coaxial powderfeeding head is located above a welded joint of the to-be-welded sample, and the gas protection device is used for feeding inert gas into the closed hood. According to the device, the brittleness ofa gamma-TiAl intermetallic compound can be reduced in the laser welding process of the gamma-TiAl intermetallic compound, the possibility of crack initiation in the welded joint is reduced, and then the mechanical property of the welded joint is improved.

Description

technical field [0001] The invention relates to a γ-TiAl intermetallic compound laser welding device and method with a preheating device, belonging to the technical field of laser welding. Background technique [0002] γ-TiAl intermetallic compounds have become the most potential structural materials in heat-resistant structural parts of aviation and aerospace engines due to their excellent properties such as low density, high specific strength and specific modulus, high temperature oxidation resistance and creep resistance. The application of aeroengine blades is a hot spot in the field of titanium alloy research. [0003] In the process of using γ-TiAl intermetallic compounds to produce structural parts, the welding process of materials will be involved. Due to the room temperature brittleness of γ-TiAl intermetallic compounds, it is easy to initiate cracks in the weld during the welding process, which in turn affects the mechanical properties of the welded joint. At pre...

Claims

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Application Information

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IPC IPC(8): B23K26/21B23K26/60B23K26/70
CPCB23K26/21B23K26/60B23K26/702
Inventor 张可召何超威张伟达严春妍包晔峰
Owner HOHAI UNIV CHANGZHOU
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