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

A kind of ni-fe-al alloy with linear superelasticity and preparation method thereof

A ni-fe-al, superelastic technology, applied in the field of alloy materials, can solve the problems of difficult precise control of composition, limited alloy research and development, limited cold deformation ability, etc., to achieve easy raw materials, expanded application temperature range, excellent superelasticity Effect

Inactive Publication Date: 2012-02-08
CENT SOUTH UNIV
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cold deformation ability of Ni-Fe-Al alloy is limited. Although it has good thermal processing performance, its thermal processing temperature must be above 1300 °C, which requires high molds and harsh processing conditions; and the Ni- The composition of Fe-Al alloy is difficult to control precisely, and composition segregation is easy to occur, which affects the performance of the material and limits the research and development of this alloy.

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
  • A kind of ni-fe-al alloy with linear superelasticity and preparation method thereof
  • A kind of ni-fe-al alloy with linear superelasticity and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Step 1) Weigh the components according to atomic percentage: nickel (Ni) is 56.5%, iron (Fe) is 18.5%, aluminum (Al) is 25%, and these three powders are placed in a mixing tank and mixed evenly.

[0021] Step 2) Pressing the powder into shape with a pressing pressure of 500 MPa.

[0022] Step 3) Vacuum sintering at a sintering temperature of 1280° C., holding time for 2 hours, and cooling with the furnace.

[0023] Step 4) Heating the alloy sintered billet to 1280° C. and keeping it warm for 2 hours, taking it out and immediately performing quenching treatment.

[0024] For the Ni prepared above 56.5 Fe 18.5 al 25 The mechanical properties of the alloy were tested, and it was found that the quenched state of the alloy showed complete linear superelasticity, and the elastic recovery was 4.3%.

Embodiment 2

[0026] Step 1) Weigh the components according to atomic percentage: nickel (Ni) is 56.5%, iron (Fe) is 18.5%, aluminum (Al) is 25%, and these three powders are placed in a mixing tank and mixed evenly.

[0027] Step 2) Pressing the powder into shape with a pressing pressure of 500 MPa.

[0028] Step 3) Vacuum sintering at a sintering temperature of 1280° C., holding time for 2 hours, and cooling with the furnace.

[0029] Step 4) Heating the alloy sintered billet to 1200° C. and keeping it warm for 16 hours, taking it out and immediately performing quenching treatment.

[0030] For the Ni prepared above 56.5 Fe 18.5 al 25 The mechanical properties of the alloy were tested, and it was found that the quenched state of the alloy showed complete linear superelasticity, and the elastic recovery was 4.2%.

Embodiment 3

[0032] Step 1) Weigh the components according to atomic percentage: nickel (Ni) is 56%, iron (Fe) is 19%, aluminum (Al) is 25%, and these three powders are placed in a mixing tank and mixed evenly.

[0033] Step 2) Pressing the powder into shape with a pressing pressure of 500 MPa.

[0034] Step 3) Vacuum sintering at a sintering temperature of 1280° C., holding time for 2 hours, and cooling with the furnace.

[0035] Step 4) Heating the alloy sintered billet to 1280° C. and keeping it warm for 2 hours, taking it out and immediately performing quenching treatment.

[0036] For the Ni prepared above 56 Fe 19 al 25 The mechanical properties of the alloy were tested, and it was found that the quenched state of the alloy showed complete linear superelasticity, and the elastic recovery was 4.2%.

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
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a Ni-Fe-Al alloy with linear superelasticity and a preparation method thereof. The composition and content (by atomic percentage) of the alloy are: nickel (Ni) is 56.5-51%, iron (Fe) It is 18.5-22%, and the rest is aluminum (Al). The Ni-Fe-Al alloy is directly prepared by powder metallurgy technology, and the process includes mixing, pressing, sintering and heat treatment (quenching). The alloy sintered billet exhibits linear superelasticity after quenching treatment, and the elastic recovery is 3-7%. The invention has a wide range of applications. In actual engineering, the superelasticity can be used to absorb and dissipate the vibration energy of the structure. It can be used to make mechanical sensing and control elements, human body orthopedic elements, damping elements, high-efficiency elastic elements, and wave absorbing and reducing elements. Shock and noise prevention devices, overload protection monitoring and forecasting of structural parts.

Description

technical field [0001] The invention belongs to the technical field of alloy materials, and relates to an alloy with linear superelasticity and a preparation method thereof, more specifically, to a Ni-Fe-Al alloy with linear superelasticity and a powder metallurgy preparation method thereof. Background technique [0002] At present, there are many reports on Ti-Ni series, Cu-based, Fe-based and magnetic superelastic alloy systems at home and abroad. [0003] Ni-Ti alloy has the characteristics of high specific strength, good biocompatibility, excellent damping, non-magnetic, corrosion resistance, wear resistance, etc., and has good superelasticity in the phase transition region. After a certain process, the linear The hyperelastic strain can reach 4%, and the non-linear hyperelastic strain can reach about 8%. But the phase transition temperature of Ti-Ni alloy is low, and the price is expensive, and it is difficult to process and form. [0004] Cu-based alloys are thermoel...

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 Patents(China)
IPC IPC(8): C22C19/03C22C1/04C21D1/18C22F1/10
Inventor 罗丰华卢静
Owner CENT SOUTH UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com