Method for rapidly forming Ti-6Al-4V three-dimensional metal parts by electron beams

A ti-6al-4v, metal parts technology, applied in the field of electron beam rapid prototyping Ti-6Al-4V high-performance three-dimensional metal parts, to achieve the effects of high production efficiency, simple preparation process and excellent mechanical properties

Inactive Publication Date: 2015-04-29
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for rapid forming of Ti-6Al-4V three-dimensional metal parts by ele

Method used

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  • Method for rapidly forming Ti-6Al-4V three-dimensional metal parts by electron beams
  • Method for rapidly forming Ti-6Al-4V three-dimensional metal parts by electron beams
  • Method for rapidly forming Ti-6Al-4V three-dimensional metal parts by electron beams

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Such as Figure 1(a) As shown, the human skull model model is designed by using CAD software, and the wall thickness is 3mm. With Ti-6Al-4V alloy powder ( figure 2 , powder diameter is 50-80μm) as raw material, using Arcam A1 electron beam melting equipment to prepare Ti-6Al-4V human skull model, electron beam scanning speed is 10000mm / s, electron beam current is 18mA, the prepared Ti-6Al -4V human skull model such as Figure 1(b) shown.

[0043] In this example, the prepared Ti-6Al-4V human skull model is subjected to hot isostatic pressing, the process is as follows: the temperature is 920° C., the pressure is 120 MPa, and the holding time is 3 hours.

[0044] In this embodiment, the prepared Ti-6Al-4V human skull is subjected to two-step heat treatment in the two-phase region:

[0045] (1) Two-phase zone annealing treatment Using a vacuum heat treatment furnace, the prepared Ti-6Al-4V human skull was kept at 800 °C for 1 h, and cooled to room temperature at a rat...

Embodiment 2

[0049] Such as Figure 3(a) As shown, the chess piece model is designed using CAD software, and the thinnest wall thickness of the chess piece is 4mm. Using Ti-6Al-4V alloy powder as raw material ( figure 2 , the powder diameter is 50-80 μm), the Ti-6Al-4V chess pieces were prepared by Arcam A1 electron beam melting equipment, the electron beam scanning speed was 13000m / s, the electron beam current was 20mA, and the stacking direction was perpendicular to the direction of the substrate. Prepared Ti-6Al-4V chess pieces such as Figure 3(b) shown.

[0050] In this embodiment, the prepared Ti-6Al-4V human skull model is subjected to hot isostatic pressing, the process is as follows: the temperature is 950° C., the pressure is 100 MPa, and the holding time is 2 hours.

[0051] In this embodiment, the prepared Ti-6Al-4V chess pieces are subjected to two-step heat treatment in the two-phase region:

[0052] (1) Two-phase zone annealing treatment Using a vacuum heat treatment fu...

Embodiment 3

[0056] Such as Figure 4(a) As shown, the acetabular cup model was designed using CAD software. The surface of the acetabular cup has a 2 mm thick porous structure, and the thinnest part of the acetabular cup is 2 mm. Using Ti-6Al-4V alloy powder as raw material ( figure 2 , the powder diameter is 50-80 μm), the Ti-6Al-4V acetabular cup was prepared by Arcam A1 electron beam melting equipment, the electron beam scanning speed was 12500mm / s, the electron beam current was 25mA, and the stacking direction was vertical to the substrate. Prepared Ti-6Al-4V acetabular cup as Figure 4(b) shown.

[0057] In this example, the prepared Ti-6Al-4V acetabular cup is subjected to hot isostatic pressing, the process is as follows: the temperature is 940° C., the pressure is 110 MPa, and the holding time is 2.5 hours.

[0058] In this example, the prepared Ti-6Al-4V acetabular cup is subjected to two-step heat treatment in the two-phase region:

[0059] (1) Two-phase zone annealing trea...

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Abstract

The invention relates to the technical field of electron beam machining, in particular to a method for rapidly forming Ti-6Al-4V three-dimensional metal parts by electron beams. The method is suitable for rapid forming and preparation of various complex-structure Ti-6Al-4V metal parts. The method comprises the steps of firstly, preparing the Ti-6Al-4V three-dimensional metal parts; secondly, carrying out hot isostatic pressing treatment on the prepared three-dimensional parts under 800-1000 DEG C; finally, carrying out annealing treatment on titanium alloy components under 700-1000 DEG C and aging treatment on the titanium alloy components under 400-600 DEG C. Through the technological processes, the Ti-6Al-4V complex-structure three-dimensional metal parts, of which the tensile strength is higher than 900MPa, the ductility is higher than 10%, the fatigue strength is higher than 500MPa, and the impact toughness is higher than 30J/cm<2>, with excellent comprehensive mechanical properties can be obtained and can be widely applied to the fields of spaceflight, medical treatment and the like.

Description

Technical field: [0001] The invention relates to the technical field of electron beam processing, in particular to a method for rapid forming of Ti-6Al-4V high-performance three-dimensional metal parts by electron beams, and the method is suitable for the rapid forming preparation of Ti-6Al-4V metal parts with various complex structures. Background technique: [0002] Additive Fabrication via Electron Eeam Melting (AM-EBM) is one of the advanced manufacturing technologies that have developed rapidly in recent years. EBM technology uses the electron beam as the energy source, through the layered slice processing of the three-dimensional digital model of the part, it is discretized into a series of two-dimensional data files, and then according to the file information of each layer, the computer system controls the movement of the electron beam to move the metal powder one by one The layers are fused and accumulated, and finally a sample that is completely consistent with the ...

Claims

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Application Information

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IPC IPC(8): B22F3/105B22F3/14B22F3/24B22F5/00
Inventor 李述军侯文韬王哲郝玉琳杨锐
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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