A method for laser additive manufacturing of titanium alloy monolithic components with gradient structure

A technology of gradient structure and integral components, which is applied in the preparation of gradient structure titanium alloy integral components and the field of laser additive manufacturing of gradient structure titanium alloy integral components, can solve the problems of complex laser additive manufacturing process and many influencing factors, and achieve mechanical The effect of controllable performance, simple process and low-cost manufacturing

Active Publication Date: 2021-12-24
JINAN UNIVERSITY
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, due to the complexity of the laser additive manufacturing process, there are many influencing factors
At present, there is still a lack of effective methods to control the grain morphology and the transition of different grain morphology of titanium alloys manufactured by laser additive manufacturing, and the manufacture of titanium alloy integral components with gradient structures still faces great challenges.

Method used

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  • A method for laser additive manufacturing of titanium alloy monolithic components with gradient structure
  • A method for laser additive manufacturing of titanium alloy monolithic components with gradient structure
  • A method for laser additive manufacturing of titanium alloy monolithic components with gradient structure

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Embodiment 1

[0031] This embodiment specifically discloses a method for laser additively manufacturing a titanium alloy integral component with a gradient structure, and the implementation steps are as follows:

[0032] Step 1: Given any amount of powder feeding (5g / min), conduct preliminary process optimization on the sample of the single deposition layer to obtain laser power (1000W), spot diameter (3mm), scanning speed (10mm / s), etc. other process parameters.

[0033] The second step: further adjust the powder feeding amount on the basis of the primary selection process parameters. The adjustment range is from 1g / min to 25g / min, and different powder feeding rates are selected for the preparation of single-pass deposition layer samples. Measure the height of a single deposition layer under different process parameters and carry out metallographic inspection, and establish a relationship curve between the height of the deposition layer and the integral fraction of equiaxed crystals, such...

Embodiment 2

[0037] This embodiment specifically discloses another method for laser additively manufacturing a titanium alloy integral component with a gradient structure, and the implementation steps are as follows:

[0038] Step 1: Given any amount of powder feeding (5g / min), conduct preliminary process optimization on the sample of the single deposition layer to obtain laser power (1000W), spot diameter (3mm), scanning speed (10mm / s), etc. other process parameters.

[0039] The second step: further adjust the powder feeding amount on the basis of the primary selection process parameters. The adjustment range is from 1g / min to 25g / min, and different powder feeding rates are selected for the preparation of single-pass deposition layer samples. Measure the height of a single deposition layer under different process parameters and carry out metallographic inspection, and establish a relationship curve between the height of the deposition layer and the integral fraction of equiaxed crystals...

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Abstract

The invention discloses a method for laser additively manufacturing a titanium alloy integral component with a gradient structure. The steps of the method are as follows: firstly, preliminary process parameter optimization is performed on the laser additively manufactured titanium alloy; The relationship between the amount of powder and the fraction of equiaxed crystals in a single deposition layer; then by controlling the degree of remelting, the relationship between the depth of remelting / remelting width and the fraction of equiaxed crystals is established; finally, according to the geometric model of the overall titanium alloy component And the organizational characteristic requirements of different parts, select the corresponding process parameters for component forming. The invention can effectively prepare the titanium alloy integral component with gradient structure characteristics in the deposition direction and the horizontal direction through the regulation and control of the grain morphology.

Description

technical field [0001] The present invention relates to the technical field of metal laser additive manufacturing, in particular to a method for laser additive manufacturing of titanium alloy integral components with gradient structure, specifically refers to the realization of gradient structure by controlling the solidification and remelting of deposited layers in the process of layer-by-layer deposition A method for preparing a titanium alloy monolithic component. Background technique [0002] Advanced aerospace equipment pursues lightweight, high performance and high reliability, and the demand for the application of titanium alloy integral components is increasingly urgent. The integration of titanium alloy components improves service reliability while reducing weight, but the processing of integral components, especially components with different performance requirements in different parts, still faces great challenges. Taking the aero-engine titanium alloy integral t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/105B22F10/85B22F10/28C22C1/04C22C14/00B33Y10/00B33Y50/02B33Y70/00
CPCC22C1/0458C22C14/00B33Y10/00B33Y50/02B33Y70/00B22F10/00B22F12/90B22F10/38B22F10/36B22F10/364B22F10/28B22F10/32Y02P10/25
Inventor 张强陈静张思雨王小健李卫
Owner JINAN UNIVERSITY
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