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Method for refining laser additive manufacturing titanium alloy grain through ultrasonic impact and induction heating

A technology of induction heating and ultrasonic impact, which is applied in the field of preparation of titanium alloy grains, can solve the problems of inconspicuous grain refinement effect and prominent anisotropy of titanium alloy components, and achieve the improvement of comprehensive mechanical properties and grain refinement Uniform, full effect effect

Inactive Publication Date: 2018-02-02
XI AN JIAOTONG UNIV
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Problems solved by technology

Therefore, if the existing ultrasonic impact technology is directly used for laser additive manufacturing of titanium alloys, the effect of grain refinement is not obvious, and it cannot solve the problem of prominent anisotropy of laser additive manufacturing titanium alloy components.

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  • Method for refining laser additive manufacturing titanium alloy grain through ultrasonic impact and induction heating
  • Method for refining laser additive manufacturing titanium alloy grain through ultrasonic impact and induction heating
  • Method for refining laser additive manufacturing titanium alloy grain through ultrasonic impact and induction heating

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Embodiment Construction

[0023] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0024] see figure 1 , the preparation process of the present invention is as follows:

[0025] 1. Basic process parameters of laser additive manufacturing titanium alloy: TC4 titanium alloy powder particle size 50-150μm, laser power 210W, scanning speed 10mm / s, powder feeding amount 2.5g / min, Z-axis lifting amount 0.10mm, scanning distance 0.3mm ;

[0026] Induction heating auxiliary setting basic parameters: the induction coil is a rectangle of 50×150mm, the induction heating set temperature is 600°C, the design fixture is installed at the end of the stepper motor slide rail, and the cladding layer is lifted synchronously during the forming process to ensure the temperature of the sample basically stable.

[0027] The parameters of the ultrasonic impact process are the impact power of 1000W and the impact frequency of 40kHz. The ultrasonic impact gun uses...

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Abstract

The invention provides a method or refining a laser additive manufacturing titanium alloy grain through ultrasonic impact and induction heating. On the basis of a laser additive manufacturing titaniumalloy technology, combination of ultrasonic impact and induction heating is adopted to refine the titanium alloy grain, after laser cladding is conducted to form a layer, an ultrasonic impact deviceis utilized to process the cladding layer, when a multi-layer sample part is formed, laser cladding and ultrasonic impact are conducted alternately so that the cladding layer can be subjected to medium temperature plastic deformation, thus a plastic deformation layer with the certain thickness can be formed, coarse columnar crystal structures in the deformation layer form deformation subgrain or textured microstructures along with increasing of the dislocation density, and accordingly the cladding layer structure is refined. The problems that the deformation resistance is large, the plasticityat the normal temperature is poor, the deformation resilience is large, and deformation is prone to generating defects such as cracks in the plastic processing process of the titanium alloy in a coldstate are solved. Meanwhile, refining of the laser additive manufacturing titanium alloy grain is achieved by utilizing ultrasonic impact, the prominent problems that the laser additive manufacturingtitanium alloy columnar crystal is coarse, and the anisotropy is obvious are solved, and the comprehensive mechanical properties of the titanium alloy are improved.

Description

technical field [0001] The invention relates to a method for preparing titanium alloy grains, in particular to a method for manufacturing titanium alloy grains by ultrasonic shock and induction heating and refining laser additive materials. Background technique [0002] Laser additive manufacturing of titanium alloy technology is an emerging technology in recent years. This technology melts synchronously transported titanium alloy powder through high-power laser, and accumulates forming parts point by point, which overcomes the difficulty of traditional technology in producing complex titanium alloy components, titanium However, due to the poor thermal conductivity of titanium alloys, coarse columnar crystals perpendicular to the scanning direction and penetrating through the entire cladding deposition layer are formed during the laser cladding deposition process, resulting in obvious anisotropy of titanium alloy components ( It can reach 15%-70%), and its fatigue strength a...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/105B22F3/24B33Y10/00
CPCB22F3/24B33Y10/00B22F2003/248B22F10/00B22F10/36B22F10/25B22F12/222B22F12/17B22F10/32Y02P10/25
Inventor 张安峰李涤尘张金智梁朝阳王豫跃张晓星
Owner XI AN JIAOTONG UNIV
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