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A method for inhibiting the formation of acicular martensite phase in 3D printed tc4 alloy structure

A technology of alloy structure and 3D printing, which is applied in the direction of additive manufacturing, metal processing equipment, process efficiency improvement, etc., can solve the problems of reducing actual production efficiency and increasing production cost, achieve excellent plasticity, reduce rapid manufacturing cost, and improve production efficiency effect

Active Publication Date: 2021-11-05
SOUTH CHINA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This greatly reduces the actual production efficiency, and the production cost also increases accordingly

Method used

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  • A method for inhibiting the formation of acicular martensite phase in 3D printed tc4 alloy structure
  • A method for inhibiting the formation of acicular martensite phase in 3D printed tc4 alloy structure
  • A method for inhibiting the formation of acicular martensite phase in 3D printed tc4 alloy structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Step 1: Dry TC4 titanium alloy powder in a vacuum dryer at 120°C for 100 minutes, then add the powder to the powder feeding device and store the excess powder in vacuum packaging;

[0027] Step 2: Use 100-mesh and 600-mesh sandpaper to polish the base material of the formed TC4 alloy plate to remove the oxide layer, and then wipe it clean with alcohol and acetone;

[0028] Step 3: The spherical TC4 powder prepared in step 1 is subjected to laser melting deposition forming on the TC4 alloy plate substrate in step 2 to obtain a Ti6Al4V titanium alloy sample whose shape meets the preset requirements. The process parameters of laser melting deposition forming are set as follows: laser power 1500W, scanning speed 10mm / min, powder feeding rate 7g / min, laser spot diameter 3mm, deposition thickness 0.6mm, single pass width 3mm, overlap rate 45%;

[0029] Step 4: The TC4 titanium alloy sample formed by laser melting deposition is separated from the substrate by a wire cutting me...

Embodiment 2

[0032] Step 1: Dry TC4 titanium alloy powder in a vacuum dryer at 120°C for 100 minutes, then add the powder to the powder feeding device and store the excess powder in vacuum packaging;

[0033] Step 2: Use 100-mesh and 600-mesh sandpaper to polish the base material of the formed TC4 alloy plate to remove the oxide layer, and then wipe it clean with alcohol and acetone;

[0034] Step 3: The spherical TC4 powder prepared in step 1 is subjected to laser melting deposition forming on the TC4 alloy plate substrate in step 2 to obtain a Ti6Al4V titanium alloy sample whose shape meets the preset requirements. The process parameters of laser melting deposition forming are set as follows: laser power 2000W, scanning speed 12mm / min, powder feeding rate 10.5g / min, laser spot diameter 3mm, deposition thickness 0.63mm, single pass width 3.74mm, lap rate 45%;

[0035] Step 4: The TC4 titanium alloy sample formed by laser melting deposition is separated from the substrate by a wire cutting...

Embodiment 3

[0038]Step 1: Dry TC4 titanium alloy powder in a vacuum dryer at 120°C for 100 minutes, then add the powder to the powder feeding device and store the excess powder in vacuum packaging;

[0039] Step 2: Use 100-mesh and 600-mesh sandpaper to polish the base material of the formed TC4 alloy plate to remove the oxide layer, and then wipe it clean with alcohol and acetone;

[0040] Step 3: The spherical TC4 powder prepared in step 1 is subjected to laser melting deposition forming on the TC4 alloy plate base material in step 2 to obtain a Ti6Al4V titanium alloy sample whose shape meets the preset and requirements. The process parameters of laser melting deposition forming are set as follows: laser power 2000W, scanning speed 8mm / min, powder feeding rate 10.5g / min, laser spot diameter 3mm, deposition thickness 1.12mm, single pass width 4.3mm, lap rate 45%;

[0041] Step 4: The TC4 titanium alloy sample formed by laser melting deposition is separated from the substrate by a wire cu...

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Abstract

The invention belongs to the technical field of 3D printing additive manufacturing of metal materials, and discloses a method for inhibiting the formation of acicular martensite phase in 3D printing formed TC4 alloy structure. The TC4 powder is laser melted and deposited on the TC4 alloy plate base material to obtain a TC4 titanium alloy material whose shape meets the requirements; the obtained TC4 titanium alloy material is separated from the base material by wire cutting technology to obtain a TC4 alloy whose plastic toughness meets the use requirements Material. The method of the invention mainly solves the problem that the TC4 titanium alloy is easy to obtain fine needle-like α' martensite structure in the process of laser melting deposition forming, resulting in poor plasticity and toughness of the material. The resulting TC4 alloy has a room temperature tensile strength greater than 1000MPa, a yield strength of not less than 950MPa, and an elongation after fracture of more than 10%. It also has excellent plasticity while ensuring the strength requirements, meets industrial application requirements, reduces rapid manufacturing costs, and improves production efficiency. .

Description

technical field [0001] The invention belongs to the technical field of 3D printing additive manufacturing of metal materials, and in particular relates to a method for inhibiting the formation of acicular martensite phase in 3D printing formed TC4 alloy structure. Background technique [0002] Metal 3D printing technology is a hot research topic in recent years. It is based on the "discrete + accumulation" additive manufacturing concept, using metal powder as raw material, using high-energy particle beams to melt it, and combining with 3D digital models layer by layer Build up to prepare metal parts. [0003] TC4 titanium alloy has attracted people's attention because of its excellent performance characteristics such as low density, high specific strength, good corrosion resistance, high temperature creep resistance and biocompatibility. It has a wide range of applications in many important fields such as aerospace. However, titanium has high activity and is easy to oxidiz...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C14/00C22C1/04B22F3/105B22F1/00B33Y10/00B33Y40/10
CPCC22C14/00C22C1/0458B33Y10/00B33Y40/00B22F10/00B22F1/14B22F10/66B22F10/25B22F10/34B22F10/36B22F10/366B22F10/38Y02P10/25
Inventor 李小强傅道健王敏张震屈盛官
Owner SOUTH CHINA UNIV OF TECH
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