Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Selective laser melting machining method and application of high-nickel-rich NiTi alloy

A laser melting and processing method technology, applied in the field of shape memory alloys, can solve the problems of inability to apply high nickel content NiTi alloys, difficult to prepare structural parts, difficult forming, etc., and achieve excellent compressive fracture strength, high forming accuracy, and fewer internal defects. Effect

Active Publication Date: 2021-07-20
CHINA UNIV OF PETROLEUM (BEIJING)
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there have been many reports on the research results of near-equal atomic ratio NiTi alloys prepared by SLM, but the method of preparing near-equal atomic ratio NiTi alloys by SLM cannot be applied to NiTi alloys with high nickel content.
This is because, unlike NiTi alloys with near equiatomic ratio, NiTi alloys with high nickel content are essentially a kind of Ni 4 Ti 3 NiTi-Ni with a ceramic phase ratio of more than 40% 4 Ti 3 Composite materials, whose microstructure, mechanical properties and phase transition behavior are significantly different from those of near equiatomic ratio NiTi alloys, are extremely difficult to form, and it is even more difficult to prepare structural parts with complex shapes

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Selective laser melting machining method and application of high-nickel-rich NiTi alloy
  • Selective laser melting machining method and application of high-nickel-rich NiTi alloy
  • Selective laser melting machining method and application of high-nickel-rich NiTi alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] The selective laser melting processing method of the NiTi alloy of the present embodiment comprises the following steps:

[0062] 1) put the alloy powder whose nickel-titanium atomic ratio is Ni: 53% and Ti: 47%, particle size is 13-65 μm, and D90 is 63.6 μm in a vacuum drying oven at 80° C. for 4 hours;

[0063] 2) Construct a three-dimensional model of a 10×10×6mm square sample, then slice it and determine the printing process parameters and input it into the SLM machine processing control system;

[0064] 3) Install the nickel-titanium substrate in the molding cavity and preheat it to 180°C, put the powder dried in step 1) into the powder tank and pre-set evenly on the nickel-titanium substrate to form the first layer to be treated, and then pour the Argon gas is introduced into the molding cavity to make the oxygen content in the molding cavity lower than 500ppm;

[0065] 4) According to the first printing process parameters in the printing process parameters, lase...

Embodiment 2

[0072] The selective laser melting processing method of the NiTi alloy of the present embodiment comprises the following steps:

[0073] 1) put the alloy powder whose nickel-titanium atomic ratio is Ni:55% and Ti:45%, particle size is 13-53 μm, and D90 is 50.9 μm in a vacuum drying oven at 80° C. for 4 hours;

[0074] 2) Construct a three-dimensional model of a 10×10×6mm square sample, then slice it and determine the printing process parameters and input it into the SLM machine processing control system;

[0075] 3) Install the nickel-titanium substrate in the molding cavity and preheat it to 180°C, put the powder dried in step 1) into the powder tank and pre-set evenly on the nickel-titanium substrate to form the first layer to be treated, and then pour the Argon gas is introduced into the molding cavity to make the oxygen content in the molding cavity lower than 500ppm;

[0076] 4) According to the first printing process parameters in the printing process parameters, laser ...

Embodiment 3

[0083] The selective laser melting processing method of the NiTi alloy of the present embodiment comprises the following steps:

[0084] 1) put the alloy powder whose nickel-titanium atomic ratio is Ni: 53% and Ti: 47%, particle size is 13-65 μm, and D90 is 63.6 μm in a vacuum drying oven at 80° C. for 4 hours;

[0085] 2) Construct a three-dimensional model of a 10×10×6mm square sample, then slice it and determine the printing process parameters and input it into the SLM machine processing control system;

[0086] 3) Install the nickel-titanium substrate in the molding cavity and preheat it to 180°C, put the powder dried in step 1) into the powder tank and pre-set evenly on the nickel-titanium substrate to form the first layer to be treated, and then pour the Argon gas is introduced into the molding cavity to make the oxygen content in the molding cavity lower than 500ppm;

[0087] 4) According to the first printing process parameters in the printing process parameters, lase...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention provides a selective laser melting machining method and application of a high-nickel-rich NiTi alloy. The machining method comprises the steps that: (1) NiTi alloy powder is preset to form a to-be-treated layer, in the NiTi alloy powder, the atomic percent of the Ni element is 53-57%, and the balance is Ti atoms; (2) laser melting treatment on the to-be-treated layer is performed according to printing process parameters to form a target layer; and (3) the step (1) to the step (2) are executed repeatedly, so that an NiTi alloy part is formed; and in the laser melting treatment, the laser power is 80-150 W, the laser scanning speed is 150-450 mm / s, and the laser scanning interval is 30-120 mu m. According to the machining method, selective laser melting machining can be performed with the NiTi alloy powder with the high nickel content as an object; the precision of a machined part can be guaranteed; and the machined part can have excellent performance in the mechanical property aspect.

Description

technical field [0001] The invention relates to a processing method of a high-nickel-rich NiTi alloy, in particular to a selective laser melting processing method and application of a high-nickel-rich NiTi alloy, belonging to the technical field of shape memory alloys. Background technique [0002] Nickel-titanium binary alloys with high nickel content (such as 53–57at.%Ni) have the advantages of high hardness, low density, excellent corrosion resistance and superelastic properties, which are very beneficial for structural applications, such as aerospace, deep sea, etc. It has application potential in fields such as detection. However, the machinability of high-nickel-content NiTi alloys is extremely poor, and there are problems such as difficulty in chipping, poor weldability, and poor machining accuracy induced by superelasticity, making it very difficult to manufacture high-nickel-content NiTi alloy parts with high-precision complex geometries. [0003] Selective laser m...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B22F10/28B33Y10/00B33Y70/00B33Y80/00C22C19/03
CPCB33Y10/00B33Y70/00B33Y80/00C22C19/03Y02P10/25
Inventor 郝世杰沈慧杨英郭方敏崔清丽
Owner CHINA UNIV OF PETROLEUM (BEIJING)
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com