tc21 titanium alloy powder for laser 3D printing and its preparation and use method

Abstract

TC21 titanium alloy powder for laser 3D printing and its preparation and use method, powder composition by mass percentage: Al: 5.5-6.7%, Sn: 1.7-2.4%, Zr: 1.7-2.4%, Mo: 2.4-3.1%, Cr: 1.0~1.8%, Nb: 1.8~2.2%, Fe: 0.004~0.18%, C: 0.004~0.01%, N: 0.002~0.009%, H: 0.003~0.01%, O: 0.08~0.1%, the balance is Ti; Preparation method: After the TC21 titanium alloy is processed into an electrode, it rotates and falls in the melting chamber. When the tip of the titanium rod is bright white, the gas acts on the conical tip of the titanium rod, and the titanium alloy droplets are brought into the atomization chamber through the nozzle. , cooled and collected into alloy powder; method of use: after pretreatment of alloy powder with a particle size of 54-180 μm and the substrate, a deposited TC21 titanium alloy with good toughness and tensile strength is printed out by a laser 3D printer, with a tensile strength of 1100- 1150Mpa, yield strength 1010~1030Mpa, elongation 7~8%.

Description

technical field [0001] The invention belongs to the technical field of high-activity metal powder preparation for laser 3D printing, and in particular relates to a spherical TC21 titanium alloy powder for laser 3D printing and its preparation and use method. technical background [0002] Titanium and titanium alloys have excellent properties such as low density, high specific strength, and good corrosion resistance, and are widely used in aerospace and other fields. In the past few decades, the alloying theory, comprehensive strengthening and toughening technology and heat treatment process of titanium alloys for aviation have been greatly developed. With the advancement of science and technology and the performance requirements of aircraft, advanced titanium alloy materials are gradually developing towards damage-tolerant titanium alloys with high fracture toughness and low crack growth rate. Foreign developed countries have successfully applied medium-strength Ti-6Al-4V a...

AI Technical Summary

Problems solved by technology

In addition to the difficulty of hot forming, difficult machining and high cost of titanium alloy itself, TC21 has high strength and increases the difficulty of forming

When traditional methods such as precision casting, precision plastic forming, and powder metallurgy are used to form TC21, there are characteristics such as long cycle time, high equipment requirements, and poor flexibility.

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