Iron-base shape memory alloy locked key and its manufacturing and using method

A technology of memory alloy and manufacturing method, which is applied in the field of iron-based shape memory alloy fastening keys, can solve problems such as difficulty in mastering technical techniques, uneven force, and high economic cost, and achieve high-temperature leakage problems, uniform force, and Effects with low technical requirements

Inactive Publication Date: 2008-01-16
DALIAN MARITIME UNIVERSITY
View PDF0 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the metal keys used in the metal buckle legal repair process need to be pressed in one by one, which is time-consuming and laborious; the repair effect will vary greatly due to the different technical levels of the operators, and it is difficult to master mature technical methods. ; Metal fastening generally requires multiple fastening keys, and the stress of each key is un

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
  • Iron-base shape memory alloy locked key and its manufacturing and using method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] The manufacturing method of memory alloy fastening key comprises selecting smelting material according to design requirements, and mixing according to the following ratio (mass percentage of chemical composition):

[0035] Si 3.0~6.0

[0036] Mn 4.0~30.0

[0037] Cr 0~18.0

[0038] Zr 0~5.0

[0039] Nb 0~6.0

[0040] Ti 0~5.0

[0041] V 0~5.0

[0042] C 0.01~0.20

[0043] Except for impurities, the remaining components are Fe.

[0044] After mixing, it is smelted in a vacuum induction melting furnace. When smelting, after all the raw materials are melted, keep warm for about 30 minutes to make the ingredients uniform, and then cast into ingots. After the ingot is homogenized and annealed at 1200°C for 24 hours, the cap is cut off, the skin is removed by car, hot forged into a strip, and rolled at 600°C with a deformation of 10-14%, and the rolled strip alloy material is preliminarily machined The fastening key of the designed shape is then aged in a vacuum furn...

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 relates to a Fe-based shape memory alloy insert for repairing cracks, splits, damages, holes and other defects of mechanical members, and the manufacturing method and application thereof. The chemical components of the Fe-based shape memory alloy insert (mass percentage) are as follows: Si 3.0-6.0, Mn 4.0-30.0, Cr 0-18.0, Zr 0-5.0, Nb 0-6.0, Ti 0- 5.0, V 0-5.0, C 0.01-0.20, and Fe and impurity in balance. The insert is prepared by smelting in a vacuum induction smelting furnace and stretching at room temperature. The inserts each contracts to apply a tension force on the matrix at two sides of the inserts, thereby closing the crack and split. The invention has the advantages of simple and feasible process, steady action, uniform stress on each insert, and no risk of relaxation and leakage at high temperature.

Description

technical field [0001] The invention relates to an iron-based shape-memory alloy fastening key for repairing cracks, cracks, damage, holes and other defects of machine parts and its manufacturing and using methods. Background technique [0002] Uneven force and heating of large parts during use, defects in the manufacturing process, and residual stress will cause problems such as cracks, cracks, and damage to the parts. For important parts, if they are damaged, if they are replaced with new ones, it is not only expensive, but also takes a long time from ordering, transportation to installation and debugging, which will affect the use of equipment for a long time and cause economic losses. However, using appropriate technology to repair the damaged parts in a short time will avoid the loss caused by the long repair period. At present, the metal fastening process is widely used in the repair of medium and large parts, because of the large volume of medium and large parts, the...

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
IPC IPC(8): C22C38/38C22C33/04C21D1/00C21D8/00C21D7/10B23P6/04
Inventor 孙德平林成新常俊杰
Owner DALIAN MARITIME UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap