Supercharge Your Innovation With Domain-Expert AI Agents!

A Method for Observing Martensitic Variation of Mnnige-Based Alloys

A technology for martensite and base alloys, which is applied in the field of observing the microstructure of MnNiGe base alloys, and achieves the effect of simple and convenient operation

Active Publication Date: 2019-10-08
JIANGXI UNIV OF SCI & TECH
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But we know that in Ni-Mn-Ga ferromagnetic shape memory alloys, obvious martensitic modification can be easily observed, but there is no report on this aspect in the new ferromagnetic shape memory alloy MnNiGe-based alloys

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 Method for Observing Martensitic Variation of Mnnige-Based Alloys
  • A Method for Observing Martensitic Variation of Mnnige-Based Alloys
  • A Method for Observing Martensitic Variation of Mnnige-Based Alloys

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) sample preparation: calculate the quality of Mn, Ni, Ge metal simple substance that composition distribution ratio is required for MnNiGe by stoichiometric ratio, put the prepared raw material into the copper crucible of water-cooled electric arc furnace and repeat smelting 3 times, Obtain a relatively uniform Mn-Ni-Ge-based alloy ingot, polish off the surface oxide layer of the ingot, put it into a quartz tube with an inner diameter of 10-11mm, and then pressurize the ingot melted by high-frequency induction heating equipment through the A small hole with a diameter of about 0.05-0.2mm at the bottom of the quartz tube is sprayed onto a water-cooled copper mold to obtain a rod with a sample diameter of 1-6mm;

[0022] (2) Heat treatment: Put a part of the rod sample into a drawn quartz tube with an inner diameter of 10-11mm that has been closed at one end, and after vacuuming (below 4 Pa), quickly burn off the slender part of the quartz tube with an acetylene flame. ...

Embodiment 2

[0027] (1) Sample preparation: Calculate the composition ratio according to the stoichiometric ratio as MnNi 0.89 Fe 0.11 The quality of the metal elemental substance required by Ge, the prepared raw materials are repeatedly smelted 3 times to obtain alloy ingots, the oxide layer on the surface of the ingots is polished off, put into a quartz tube with an inner diameter of 10-11mm, and then pressurized by nitrogen to make the high-frequency The ingot melted by the induction heating equipment is sprayed onto the water-cooled copper mold through the small hole at the bottom of the quartz tube with a diameter of about 0.05-0.2mm, so as to obtain a rod with a sample diameter of 1-6mm;

[0028](2) Heat treatment: put a part of the rod sample into a drawn quartz tube with an inner diameter of 10-11mm that has been closed at one end, and after vacuuming, use an acetylene flame to quickly burn off the slender part of the quartz tube, and the rod sample Sealed in a vacuumed quartz tub...

Embodiment 3

[0032] (1) Sample preparation: Calculate the composition ratio as MnNi 0.78 Fe 0.22 To obtain the quality of the metal elemental substance required by Ge, repeat the smelting of the prepared raw materials 3 times to obtain an alloy ingot, polish off the oxide layer on the surface of the ingot, put it into a quartz tube with an inner diameter of 10-11mm, and pressurize it with nitrogen to make the alloy ingot The ingot melted by the frequency induction heating equipment is sprayed onto the water-cooled copper mold through the small hole at the bottom of the quartz tube with a diameter of about 0.05-0.2mm, so as to obtain a rod with a sample diameter of 1-6mm;

[0033] (2) Heat treatment: put a part of the rod sample into a drawn quartz tube with an inner diameter of 11mm that has been closed at one end, and after vacuuming, quickly burn off the slender part of the quartz tube with an acetylene flame, and seal the rod sample into the quartz tube. Put the sealed sample into a hi...

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

No PUM Login to View More

Abstract

The invention discloses a method for observing a MnNiGe-based alloy martensite variant. The method comprises (1) sample preparation: according to a composition of MnNi1-XFexGe or Mn1-XFexNiGe, preparing a metal element, melting the metal element to obtain an ingot, putting the ingot into a quartz tube, feeding nitrogen into the quartz tube for pressurization so that the ingot molten liquid melted by a high-frequency induction heating device is sprayed to a copper mold having a water cooling part through a small hole in the bottom of the quartz tube and an alloy bar is obtained, (2) heat treatment: taking a part of the alloy bar sample, sealing the alloy bar sample in the quartz tube, carrying out annealing heat treatment through a high temperature furnace and carrying out quenching or furnace cooling to the room temperature, (3) polishing: carrying out insertion to obtain the surface, bottom surface or side surface of a sample to be polished, carrying out grinding 3-4 times and carrying out polishing through a polishing machine, and (4) corrosion: corroding the polished surface through prepared aqua regia for 5-10min. The method is simple and convenient and can observe a martensite variant in the MnNiGe-based alloy. The martensite variant has not been reported in the MnNiGe-based alloy.

Description

technical field [0001] The invention relates to observing the microstructure of the MnNiGe-based alloy, in particular to a method for observing the martensite modification of the MnNiGe-based alloy. Background technique [0002] With the development of the national economy and the improvement of people's living standards, refrigeration technology has become an indispensable technology in people's daily production and life, scientific research and national defense, such as food cold processing, transportation, air conditioning, etc. The magnetic refrigeration technology has attracted people's attention for its advantages of environmental protection, high efficiency, small size, and stability, and is known as a refrigeration technology that is most likely to replace today's gas compression refrigeration. Among them, magnetic refrigeration technology in the room temperature zone occupies a pivotal position in major fields such as national economy, scientific research, and natio...

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): G01N1/28G01N1/32G01N1/44G01N21/84
Inventor 马胜灿张林刘凯钟震晨钟明龙江庆政
Owner JIANGXI UNIV OF SCI & TECH
Features
  • R&D
  • 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