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A method of manufacturing medical dense titanium alloy parts with high mechanical properties

A technology of mechanical properties and manufacturing methods, applied in the field of manufacturing of medical dense titanium alloy parts, can solve problems such as mechanical properties being difficult to meet requirements, and achieve the effects of small thermal stress, increased strength, and reduced Young's modulus

Active Publication Date: 2020-05-19
南通致远机械铸造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional laser melting powder scanning methods include: vertical scanning and parallel scanning, the density of the parts produced can reach up to 85%, so its mechanical properties are difficult to meet the requirements

Method used

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  • A method of manufacturing medical dense titanium alloy parts with high mechanical properties
  • A method of manufacturing medical dense titanium alloy parts with high mechanical properties
  • A method of manufacturing medical dense titanium alloy parts with high mechanical properties

Examples

Experimental program
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Effect test

Embodiment 1

[0035] 1. Provided by Runcorn, UK LPW Technology Co., Ltd., 1% of palladium, 2% of aluminum, 3% of nickel are prepared by atomization powder making method, and the rest is composed of titanium and unavoidable impurities. The average particle size distribution of the powder is 25μm . YSH-double-helix conical mixer mixed for 1 hour, and the powder was fully stirred evenly.

[0036] 2, 3D printer adopts AM250 system (Wotton-under-Edge, Britain), adopts the present invention as figure 1 The laser scanning method shown. A pulsed fiber laser with a single-mode power of 125W is used, and the protective gas is nitrogen and oxygen, and the oxygen content is kept at 0.5% by volume. The powder spreading method is scraper powder spreading, the thickness of each powder layer is 0.03mm; the distance between powder layers is 0.06mm. The scanning system is an optical scanning system with a spot size of 0.15mm, the scanning galvanometer is SCANLAB, and the scanning speed of the laser melting...

Embodiment 2

[0039] 1. Firstly, provided by Runcorn of British LPW Technology Co., Ltd., 2% palladium, 2% aluminum, 4% nickel are prepared by atomization powder making method, and the rest is composed of titanium and unavoidable impurities. The average particle size distribution of the powder is 26μm . YSH-double-helix conical mixer mixed for 1.5 hours, and the powder was fully stirred evenly.

[0040] 2, 3D printer adopts AM250 system (Wotton-under-Edge, Britain), adopts the present invention as figure 1 The laser scanning method shown. A pulsed fiber laser with a single-mode power of 150W is used, and the protective gas is nitrogen and oxygen, wherein the oxygen content is kept at 1.0% by volume. The powder spreading method is scraper powder spreading, the thickness of each powder layer is 0.04mm; the distance between powder layers is 0.07mm. The scanning system is an optical scanning system, its spot size is 0.18mm, the scanning galvanometer is SCANLAB, and the scanning speed of las...

Embodiment 3

[0043] 1. Provided by Runcorn, a British LPW Technology Co., Ltd., 3% of palladium, 5% of aluminum, and 6% of nickel are prepared by atomization powder making method, and the rest is composed of titanium and unavoidable impurities. The average particle size distribution of the powder is 28μm . YSH-double-helix conical mixer mixed for 2 hours, and the powder was fully stirred evenly.

[0044] 2, 3D printer adopts AM250 system (Wotton-under-Edge, Britain), adopts the present invention as figure 1 The laser scanning method shown. A pulsed fiber laser with a single-mode power of 200W is used, and the protective gas is nitrogen and oxygen, wherein the oxygen content is kept at 1.5% by volume. The powder spreading method is scraper powder spreading, the thickness of each powder layer is 0.06mm; the distance between powder layers is 0.09mm. The scanning system is an optical scanning system, its spot size is 0.20mm, the scanning galvanometer is SCANLAB, and the scanning speed of l...

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Abstract

The invention discloses a manufacturing method for medical compact titanium alloy parts with higher mechanical performances. Mixed powder of palladium, aluminum, nickel, titanium and inevitable impurities is prepared as blanks by adopting an AM250 system through a 3D printing mode. The AM250 system adopts a pulse optical fiber laser with single mode power of 125-200 W; protective gas is nitrogen and oxygen; and the oxygen content is maintained within 0.5-1.5%. A scanning system is an optical scanning system for scanning by adopting a cross scanning mode. Finally, the blanks are put in a vacuumheat treatment furnace of 200-400 DEG C for heat oxidation by 3-6 hours. The metal powder can be fully heated through laser by the scanning mode for melting, and is combined after cooling, so that the product compactness can reach 99.8% to the greatest extent.

Description

technical field [0001] The invention relates to a method for manufacturing medical dense titanium alloy parts with higher mechanical properties. Background technique [0002] The strength and hardness manufacturing of traditional powder metallurgy parts is developing towards refinement, and the demand for micro parts is increasing. How to prepare high-precision, high-performance micro parts has become the development trend of the manufacturing industry. Shishkovsky et al. took the lead in 2007 to use the selective laser melting method to directly manufacture parts from powder, and successfully prepared YSZ-Al2O3 samples by melting the powder with a laser source. Although the surface morphology of the samples is relatively smooth, uniform and dense, the interior still contains Pores and cracks. PMG Group has developed a patented surface densification process --- DensiForm, using this process to form a fully densified surface layer with a depth of 1mm on the key part of the s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B33Y10/00
Inventor 鄢腊梅罗鹏顾彦袁友伟
Owner 南通致远机械铸造有限公司
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