Preparation method of aging-enhanced copper-chromium alloy

An enhanced and alloyed technology, which is applied in the field of preparation of aging-enhanced CuCr alloys, can solve the problems of Cr agglomeration, large precipitated phase size, and low content, and achieve the effects of good alloy composition uniformity, simple operation, and high density

Inactive Publication Date: 2018-01-19
XIAN UNIV OF TECH
View PDF4 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing an aging-enhanced CuCr alloy, which solves the problems of low content of Cr in the copper matrix,

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
  • Preparation method of aging-enhanced copper-chromium alloy
  • Preparation method of aging-enhanced copper-chromium alloy
  • Preparation method of aging-enhanced copper-chromium alloy

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0027] Example 1

[0028] Use a balance to weigh a certain percentage of copper and chromium. The mass ratio of chromium is 4%. The oil and impurities on the surface of the material are removed. The smelting is carried out in a vacuum induction melting furnace with a vacuum of 8×10. -3 Pa, nitrogen protective atmosphere + 0.05MPa, heating rate of 2℃ / s, superheating degree of 200℃, holding time for 5min, and then using restricted nozzle atomization, atomization pressure 5MPa, nozzle diameter 4mm, atomization process is about 9s, right The prepared alloy powder is sieved with different particle sizes, the alloy powder with a certain particle size is cold-pressed, and then the cold-pressed sample is placed in a Φ21 graphite mold for atmosphere protection, hot-press sintering, and the sintering temperature is 1030℃ , The pressure is 30MPa, and the holding time is 1h. After the surface of the hot-pressed sample is treated, the sample is aged at 450℃ for 2h, and the resulting alloy samp...

Example Embodiment

[0031] Example 2

[0032] Use a balance to weigh a certain mass fraction of copper and chromium particles, the mass ratio of chromium is 3.5%, remove the oil and impurities on the surface of the material, and smelt in a vacuum induction melting furnace with a vacuum of 9×10 -3 Pa, nitrogen protective atmosphere +0.04MPa, heating rate of 2℃ / s, superheating degree of 200℃, heat preservation for 6min, and then use restricted nozzle atomization, atomization pressure 6MPa, nozzle diameter 4mm, atomization process is about 8s, right The prepared alloy powder is sieved with different particle sizes, 29g of alloy powder is weighed and cold-pressed, and then the cold-pressed sample is placed in a Φ21 graphite mold for atmosphere protection, hot-press sintering, and the sintering temperature is 1030℃. The pressure is 30MPa, and the holding time is 1h. After the surface treatment of the hot-pressed sample, the sample is subjected to 440℃ aging treatment for 2h. The resulting alloy sample has...

Example Embodiment

[0033] Example 3

[0034] Use a balance to weigh a certain mass fraction of copper and chromium particles, the mass ratio of chromium is 3.5%, and remove the oil and impurities on the surface of the material, and smelt in a vacuum induction melting furnace with a vacuum of 7×10 -3 Pa, nitrogen protective atmosphere +0.04MPa, heating rate of 2℃ / s, superheat degree of 200℃, heat preservation for 6min, and then use restricted nozzle atomization, atomization pressure 5MPa, nozzle diameter 5mm, atomization process is about 7s, right The prepared alloy powder is sieved with different particle sizes, 29g of alloy powder is weighed and cold-pressed, and then the cold-pressed sample is placed in a Φ21 graphite mold for atmosphere protection and hot-press sintering. The sintering temperature is 1020℃. The pressure is 29MPa, and the holding time is 1h. After the surface of the hot-pressed sample is treated, the sample is aged at 460℃ for 2h. The obtained alloy sample has a density of 97% and...

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
Conductivityaaaaaaaaaa
Conductivityaaaaaaaaaa
Conductivityaaaaaaaaaa
Login to view more

Abstract

The invention discloses a preparation method of an aging-enhanced copper-chromium alloy. The preparation method comprises the following steps that 1, vacuum induction melting is carried out by adopting nitrogen as a protective gas; 2, powder is prepared through atomization by using a ring hole limiting type atomizer; 3, screening is carried out on the atomized alloy powder according to different particle sizes; and 4, hot pressed sintering and aging treatment are carried out in the alloy powder with a certain particle size to obtain the copper-chromium alloy. According to the preparation method of the copper-chromium alloy, the solid solubility of chromium in copper is improved; compared with an alloy prepared through a mechanical ball milling method, the alloy is better in component uniformity; the copper-chromium alloy prepared through gas atomization has fine grain structures and relatively high degree of supersaturation of chromium, and the obtained alloy sample has high conductivity and strength; and phases precipitated from the alloy powder obtained after sintering are small in size and large in number, and the alloy powder can be used for materials of high-energy electric conduction elastic devices and electrical contacts in the aerospace field.

Description

technical field [0001] The invention belongs to the technical field of dispersion-strengthened copper alloys, and in particular relates to a method for preparing an aging-enhanced CuCr alloy. Background technique [0002] With the rapid development of electronics, electric power, transportation and aerospace industries, higher requirements are placed on the conductivity, wear resistance and service life of materials. Copper-chromium alloys have higher strength and thermal conductivity than other alloy materials. and better conductivity. According to the solid solubility curve, it can be seen that the solid solubility of chromium in copper is only about 0.7%. Improving the solid solubility of chromium in the copper matrix is ​​the main method to improve the comprehensive performance of copper-chromium alloys. At present, the methods for preparing copper-chromium alloys mainly include Powder mixing method, infiltration method, pouring method, powder mixing and infiltration me...

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): C22C9/00C22C1/04C22F1/08C22F1/02B22F9/08B22F3/14B22F3/24
Inventor 肖鹏刘笛姜伊辉邹俊涛梁淑华
Owner XIAN UNIV OF TECH
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