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Induction assisted shot blasting and thinning laser additive manufacturing method of light alloy crystal grains

A laser additive and light alloy technology, applied in metal material coating process, coating, etc., can solve problems such as prominent anisotropy and poor comprehensive mechanical properties of formed parts, so as to improve fatigue strength and eliminate internal tissue defects , the effect of promoting the spheroidization process

Inactive Publication Date: 2018-09-07
芜湖舍达科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Under this temperature field, the molten pool solidifies instantaneously, forming coarse columnar crystals penetrating through several cladding layers along the temperature gradient direction, which eventually leads to problems such as poor comprehensive mechanical properties of formed parts and prominent anisotropy.

Method used

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  • Induction assisted shot blasting and thinning laser additive manufacturing method of light alloy crystal grains
  • Induction assisted shot blasting and thinning laser additive manufacturing method of light alloy crystal grains
  • Induction assisted shot blasting and thinning laser additive manufacturing method of light alloy crystal grains

Examples

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Embodiment 1

[0030] In this example, TC4 (Ti-6Al-4V) is prepared. The shot peening device adopts the CS-2000 cold spray system independently developed by Xi'an Jiaotong University. The scanning speed is 0.5mm, the scanning speed is 8mm / s, the powder feeding volume is 2.5g / min, and the Z-axis lifting volume The overlap rate is 25%; the shot peening particles are stainless steel, the particle size is 300μm, the scanning speed is 10mm / s, the powder feeding rate is 20g / min, the gas pressure is 2.7MPa, and the shot peening time is 40s;

[0031] After depositing 100 layers, the formed cladding layer 4 is shot-peened. After the part is formed, the formed part is polished and corroded, and then placed under a digital optical microscope to observe the formed structure of the part.

[0032] Such as figure 2 As shown, the columnar grains inside the TC4 sample without induction heating-assisted shot peening are very coarse, and grow continuously through the cladding layer 4 along the deposition dir...

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Abstract

The invention discloses an induction assisted shot blasting and thinning laser additive manufacturing method of light alloy crystal grains. The induction assisted shot blasting and thinning laser additive manufacturing method comprises the following steps: 1) determining the shape of an induction coil according to a contour shape of a light alloy part to be formed; 2) adjusting the position of aninfrared temperature measurement head to enable a temperature measurement light spot formed by the infrared temperature measurement head to be located on a molded surface of a matrix; 3) starting a laser additive manufacturing system and forming a first cladding layer on the matrix; 4) lifting the induction coil and the infrared temperature measurement head by the height of one cladding layer along a laser additive manufacturing system and then forming a next cladding layer; 5) repeating step 4) and carrying out shot blasting reinforcement on the formed cladding layer every other N cladding layers through a shot blasting device; in a shot blasting reinforcement process, heating the cladding layers through the induction coil until the whole light alloy part is formed. According to the method disclosed by the invention, a formed light alloy forming part has good comprehensive mechanical properties and anisotropic prominent problems are effectively controlled.

Description

technical field [0001] The invention belongs to the field of laser additive manufacturing, and relates to a method for induction-assisted shot peening and laser additive manufacturing of light alloy grains. Background technique [0002] With the continuous progress and development of aerospace technology, the demand and quality requirements for high-performance materials have been further improved. Taking the most representative titanium alloy among light alloys as an example, since the day of its discovery, due to its high specific strength, It has a series of excellent performance characteristics such as good corrosion resistance and high temperature resistance, and has been widely used in the aerospace field. Laser additive manufacturing technology is the best choice for processing and manufacturing titanium alloy parts in aerospace, biomedical and other fields due to the direct forming of complex parts and the mechanical properties of formed parts are equivalent to forgi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C21D7/06
Inventor 王豫跃张安峰张晓星李丽君张金智
Owner 芜湖舍达科技有限公司
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