cu-fe-c-ag alloy

A cu-fe-c-ag, alloy technology, applied in the field of composite materials, can solve the problems of coarsening of Fe phase, high cost of Ag alloying, reducing the stability of Fe phase fibers, etc., to improve electrical conductivity and tensile strength. Effect

Active Publication Date: 2019-10-29
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, methods such as deformation, heat treatment, strong magnetic field, and multi-element alloying are often used, but none of them can solve this problem well.
For example: Ag is considered to be the element that has the least effect on the conductivity of Cu alloys, but it is Cu-Fe-Ag alloy prepared by alloying Cu-Fe alloy with Ag, but more than 2.5% of it is still dissolved in the as-cast Cu matrix. Fe; and Ag also reduces the stability of Fe phase fibers, causing Fe phase coarsening above 350°C, which reduces the use temperature range of the alloy; and the cost of alloying with Ag is higher
Other methods also cannot reduce the solid solution Fe in Cu to a very low state

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Raw materials are prepared: the raw materials include Cu-Ag pre-alloyed powder of 10-50 μm and Fe-1.2wt% C pre-alloyed powder with a size of 70-120 nm, and the mass percentage of C in the Fe-C alloy powder is 1.2 wt%. Cu accounts for 88.5wt% of the raw material, Ag accounts for 0.5wt% of the raw material, Fe-C pre-alloyed powder accounts for 11wt% of the raw material,

[0026] (2) Ball milling and mixing: add grinding balls for mechanical powder mixing to obtain composite powder,

[0027] (3) Hot-press sintering: put the composite powder obtained in step (2) into a hot-press sintering furnace for sintering, the sintering temperature is 900°C, the sintering pressure is 50MPa, and the sintering time is 30min.

[0028] Cu-11wt%(Fe-C)-0.5wt%Ag alloy with uniform distribution of Fe-1.2wt%C particles was prepared.

[0029] Performance tests were carried out on the alloy prepared in this example, and the tensile strength of the alloy was 603 MPa, and the electrical conduc...

Embodiment 2

[0031] (1) Prepare raw materials: raw materials include Cu-Ag pre-alloyed powders of 10-50 μm and Fe-1.0wt% C pre-alloyed powders with a size of 70-120 nm, and the mass percentage of C in the Fe-C alloy powder is 1.0 wt%. Cu accounts for 84.5wt% of the raw material, Ag accounts for 0.5wt% of the raw material, Fe-C pre-alloyed powder accounts for 15wt% of the raw material,

[0032] (2) Ball milling and mixing: add grinding balls for mechanical powder mixing to obtain composite powder,

[0033](3) Hot-press sintering: put the composite powder obtained in step (2) into a hot-press sintering furnace for sintering, the sintering temperature is 800°C, the sintering pressure is 50MPa, and the sintering time is 30min.

[0034] A Cu-15wt% (Fe-C)-0.5wt%Ag alloy with uniform distribution of Fe-1.0wt%C particles was prepared.

[0035] Performance tests were performed on the alloy prepared in this example, and the tensile strength of the alloy was 678 MPa, and the electrical conductivity ...

Embodiment 3

[0037] (1) Raw materials are prepared: the raw materials include Cu-Ag pre-alloyed powder of 10-50 μm and Fe-1.1wt% C pre-alloyed powder with a size of 50-80 nm, and the mass percentage of C in the Fe-C alloy powder is 1.1 wt%. Cu accounts for 86.5wt% of the raw material, Ag accounts for 0.5wt% of the raw material, Fe-C pre-alloyed powder accounts for 13wt% of the raw material,

[0038] (2) Ball milling and mixing: add grinding balls for mechanical powder mixing to obtain composite powder,

[0039] (3) Hot-press sintering: put the composite powder obtained in step (2) into a hot-press sintering furnace for sintering, the sintering temperature is 820°C, the sintering pressure is 50MPa, and the sintering time is 30min.

[0040] Cu-13wt%(Fe-C)-0.5wt%Ag alloy with uniform distribution of Fe-1.1wt%C particles was prepared.

[0041] Performance tests were carried out on the alloy prepared in this embodiment, and the tensile strength of the alloy was 664 MPa, and the electrical cond...

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Abstract

The invention provides Cu-Fe-C-Ag alloy. The alloy is prepared through the following steps: (1) preparation of raw materials, wherein the raw materials comprise Cu-Ag prealloy powder, (2) ball-millingmixing: adding grinding balls to perform powder mixing to obtain composite powder, (3) hot-pressure sintering: putting the composite powder obtained in step (2) into a hot-pressure sintering furnaceto sinter, keeping the sintering temperature at 800-1,000 DEG C, the sintering pressure at 45-55MPa and the sintering time of 30-45min to obtain the Cu-Fe-C-Ag alloy. The alloy can be used for improving the electric conductivity and tensile strength of the Cu-Fe alloy.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a Cu-Fe-C-Ag alloy. Background technique [0002] Compared with high-strength and high-conductivity copper alloys of other systems, the melting point of the alloying element Fe in the Cu-Fe system is relatively low, and it is easier to melt, and the immiscible gap between Fe and Cu is small, and the alloy has better deformability and machinability. It is better, so the research on Cu-Fe alloys has been paid attention to, and it has become one of the important directions for the development of high-strength and high-conductivity copper alloys. [0003] At present, high-strength and high-conductivity Cu-Fe alloys are mainly prepared by melting and casting method, and then the initial alloys are subjected to subsequent heat treatment, deformation and other processing to obtain Cu-Fe alloys in the final use state. When the primary alloy is prepared by melting and casting, due to t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/00C22C1/04
CPCB22F2998/10C22C1/0425C22C9/00B22F2009/043B22F3/14
Inventor 许磊王有超吴亚辉历长云吴三孩赵洪枫米国发
Owner HENAN POLYTECHNIC UNIV
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