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Laser additive processing method and application of ti-ni-cu-co material

A technology of ti-ni-cu-co and processing method, which is applied in the field of laser additive manufacturing, can solve the problems of high heat exchange efficiency that is difficult to achieve elastothermal cooling, failure to manufacture parts, poor plasticity of alloys, etc., and achieve excellent elastothermal effect And compression cycle stability, less internal defects, tight solidification effect

Active Publication Date: 2022-05-03
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the existing Ti-Ni-Cu-Co alloy has poor plasticity and is difficult to machine. It is impossible to manufacture parts with large specific surface area, pores and other structures, and it is difficult to achieve high heat exchange efficiency of elastothermic refrigeration.

Method used

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  • Laser additive processing method and application of ti-ni-cu-co material
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  • Laser additive processing method and application of ti-ni-cu-co material

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Experimental program
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Effect test

Embodiment 1

[0060] The Ti-Ni-Cu-Co material laser additive processing method of the present embodiment comprises the following steps:

[0061] 1) The atomic percentage is (Ti 52 Ni 38 Cu 10 ) 99 co 1 Put the pre-alloyed powder into a vacuum drying oven at 80°C for 4 hours and dry it for 4 hours. The particle size of the pre-alloyed powder is 10-250 μm;

[0062] 2) Construct a three-dimensional model of a 10×10×6mm square sample, then slice it and determine the layer slice data and input it into the SLM machine processing control system;

[0063] 3) Install the nickel-titanium substrate in the molding cavity and preheat it to 180°C, put the powder in step 1) into the powder material tank and evenly pre-set it on the nickel-titanium substrate to form the first layer to be treated, and then pour it into the molding cavity Introduce argon gas to make the oxygen content inside the molding chamber lower than 500ppm, and keep the air pressure inside the molding chamber at 10-20mbr;

[0064...

Embodiment 2

[0068] The Ti-Ni-Cu-Co material laser additive processing method of the present embodiment comprises the following steps:

[0069] 1) The atomic percentage is (Ti 52 Ni 38 Cu 10 ) 99 co 1 Put the pre-alloyed powder into a vacuum drying oven at 80°C for 4 hours and dry it for 4 hours. The particle size of the pre-alloyed powder is 5-250 μm;

[0070] 2) Construct a three-dimensional model of a 10×10×6mm square sample, then slice it and determine the layer slice data and input it into the SLM machine processing control system;

[0071] 3) Install the nickel-titanium substrate in the molding cavity and preheat it to 180°C, put the powder in step 1) into the powder material tank and evenly pre-set it on the nickel-titanium substrate to form the first layer to be treated, and then pour it into the molding cavity Introduce argon gas to make the oxygen content inside the molding chamber lower than 500ppm, and keep the air pressure inside the molding chamber at 10-20mbr;

[0072]...

Embodiment 3

[0076] The Ti-Ni-Cu-Co material laser additive processing method of the present embodiment comprises the following steps:

[0077] 1) The atomic percentage is (Ti 52 Ni 38 Cu 10 ) 99 co 1 Put the pre-alloyed powder into a vacuum drying oven at 80°C for 4 hours and dry it for 4 hours. The particle size of the pre-alloyed powder is 10-250 μm;

[0078] 2) Construct a three-dimensional model of a 10×10×6mm square sample, then slice it and determine the layer slice data and input it into the SLM machine processing control system;

[0079] 3) Install the nickel-titanium substrate in the molding cavity and preheat it to 180°C, put the powder in step 1) into the powder material tank and evenly pre-set it on the nickel-titanium substrate to form the first layer to be treated, and then pour it into the molding cavity Introduce argon gas to make the oxygen content inside the molding chamber lower than 500ppm, and keep the air pressure inside the molding chamber at 10-20mbr;

[0080...

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Abstract

The invention provides a laser additive processing method and application of a Ti-Ni-Cu-Co material. This processing method comprises: Ti-Ni-Cu-Co alloy powder forms the layer to be treated, and the molecular formula of Ti-Ni-Cu-Co alloy powder is (Ti x Ni 100‑x‑y Cu y ) 100‑z co z , where, 50≤x≤65, 10≤y≤25, 1≤z≤10; 2) Perform laser additive processing on the layer to be treated according to the printing process parameters to form the target layer; 3) Repeat step 1)-step 2 ) to form Ti-Ni-Cu-Co alloy parts; in laser additive processing, the laser power is 60-180W, the laser scanning speed is 200-1400mm / s, and the laser scanning distance is 50-130μm. The processing method can not only ensure the mechanical properties of the workpiece, but also enable the workpiece to have good high compression stability and elastothermal effect.

Description

technical field [0001] The invention relates to the field of laser additive manufacturing, in particular to a laser additive processing method and application of a Ti-Ni-Cu-Co material. Background technique [0002] With the increasing demand for food storage and transportation, space refrigeration and industrial refrigeration, refrigeration technology plays a pivotal role in modern society. Global cooling electricity consumption accounts for 25%-30% of the total electricity consumption. At present, the most widely used refrigeration technology is vapor compression refrigeration technology, because the extensive use of this technology has produced and exacerbated many environmental problems on a global scale. The use of early freon (CFC) and hydrochlorofluorocarbon (HCFC) refrigerants will destroy the ozone layer, and their substitutes, hydrofluorocarbon (HFC) refrigerants generally have a high greenhouse effect. In order to improve these refrigerants The ozone hole and gl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F10/28B33Y10/00B33Y70/00B33Y80/00C22C14/00
CPCC22C14/00B33Y10/00B33Y70/00B33Y80/00
Inventor 杨英刘何龙郝世杰郭方敏沈慧
Owner CHINA UNIV OF PETROLEUM (BEIJING)