JPS63114928A - Cu-fe alloy excellent in hot workability - Google Patents

Abstract

PURPOSE:To manufacture a Cu-Fe alloy excellent in hot workability by preparing a Cu-Fe alloy containing specific percentages of Cu, Mn, Al, C, O, H, and Fe. CONSTITUTION:The Cu-Fe alloy consisting of, by weight, 30-80% Cu, <=1.0% Mn, <=0.15% Al, <=0.02% C, <=0.02% O, <=0.003% H, and the balance essentially Fe is prepared. This Cu-Fe alloy has superior electric conductivity, strength, and wear resistance and can be suitably used as parts material for stringing for rapid-transit railway, current-collecting material, electrode tip, etc.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention is applicable to, for example, railway overhead wires, current collecting sliding materials and contacts, welding energizing tips, and electric soldering iron tips. The present invention relates to a Cu-Fe alloy that is suitably used as a material for parts that require electrical conductivity, strength, and wear resistance.

(Prior Art) Conventionally, copper-based materials have been used as materials for components that require electrical conductivity, but materials based on Cu have extremely low strength and wear resistance.

For example, materials mainly composed of Cu are used in high-speed railway overhead wires, but in response to the recent demand for even higher speeds, materials with low wear resistance and a significantly short lifespan are being used. , cannot be adequately addressed.

(Problem to be solved by the invention) Therefore, in order to improve strength and wear resistance, Cu
-It is possible to use a Fe-based alloy, which is a material that combines conductivity, strength, and wear resistance, but the conventional Cu
-Fe alloys have extremely poor hot workability, so it is quite difficult to process them into railway overhead wires and the like as exemplified above.

(Objective of the Invention) As mentioned above, this invention was made by focusing on the C'u-Fe alloy, which has a combination of electrical conductivity, strength, and abrasion resistance, and also has excellent hot workability. The purpose is to provide a Cu-Fe alloy.

[Structure of the Invention] (Means for Solving the Problems) The Cu-Fe alloy according to the present invention has a Cu:3% by weight.
0-80%, Mn: 1.0% or less, A text: 0.015%
Hereinafter, C: 0.02% or less, [O3: 0.05% or less,
[H Co: 0.003% or less, the remainder being essentially Fe.

Next, the reason for limiting the component range (weight %) of the Cu--Fe alloy according to the present invention will be explained.

Cu: 30-80% Cu is an alloying element necessary to ensure the conductivity of the material, and for this purpose, it needs to be 30% or more. If the amount of Cu is large, the conductivity will be good, but the strength and abrasion resistance will be reduced, and the service life will be shortened when used as a high-speed railway overhead line, for example.
% or less.

Mn: 1.0% or less Mn acts effectively as a deoxidizing element and is also an effective element for improving hot workability. However, M
If the amount of n exceeds 1.0%, the conductivity deteriorates significantly, which is not preferable. And for hot workability, 1.0%
In the following range, the more the content is, the better it is, but it is set to 1.0% or less for the above-mentioned reasons.

A: 0.015% or less An is an element that has a deoxidizing effect, but the higher the An content, the lower the hot workability of the Cu-Fe alloy.
．． If it exceeds 0.015%, the hot workability will be significantly deteriorated, so it is set to 0.015% or less.

C: 0.02% or less In Cu-Fe alloys, if the C content exceeds 0.02%, the liquid phase will separate into two phases and a normal alloy will not be formed, so the upper limit should be set at 0.02%. And so.

[O]: 0.05% or less In Cu-Fe alloys, the higher the O1 content, the lower the hot workability, and if it exceeds 0.05%, the hot workability will be significantly deteriorated, so % or less.

[H]: 0.003% or less In Cu-Fe-based alloys, the higher the [H] content, the lower the hot workability, and if it exceeds 0.003%, the hot workability will be significantly deteriorated, so 0. 0.003% or less.

Fe: Remainder Fe is an element effective in improving the strength and wear resistance of Cu-Fe alloys, so it was designated as the remainder.

(Example) After melting a Cu-Fe alloy having the chemical composition shown in Table 1, hot wire drawing was performed, and each wire rod obtained was
A hot welding test was conducted at a test temperature of 950°C to evaluate the hot workability of each alloy.

Then, when the torsion value in the above hot torsion test was measured, the results were also shown in Table 1.

As shown in Table 1, Cu is in the range of 30 to 80%,
Set Mn to an appropriate amount of 1.0% or less, and set A sentence to 0.015.
% or less, [O] was regulated to 0.05% or less, [H] was regulated to 0.003% or less, Nos. 1 to 8.
It was observed that the Cu-Fe alloy of (Invention Example) had a high twist value and good hot workability. In addition, it had good conductivity, strength, and wear resistance, and could be sufficiently applied to, for example, high-speed railway overhead lines, current collector 2 current-carrying tips, and the like.

On the other hand, positive alloy with too small amount of Mn, alloy 9 (comparative example), A
No. 10 (comparative example) alloy with too much u amount, No. 11 (comparative example) alloy with too much [O] amount, No. 12 (comparative example) alloy with too much [H] amount, and The alloy No. 13 (comparative example) has a small amount of Mn and a large amount of Au,
All had low torsion values and poor hot workability.

[Effects of the Invention] As explained above, the Cu-Fe alloy according to the present invention has Cu: 30 to 80% and Mn: 1.0% in weight%.
Hereinafter, Au: 0.015% or less, C: 0.02% or less,
[O]: o, 0.05% or less, [H]: 0.003% or less, and the remainder substantially consists of Fe, so it has good conductivity, strength, and abrasion resistance. It is suitable as a material for parts that require high strength, strength, and wear resistance, such as high-speed railway overhead wires, power supply materials, and electrode chips.It also has excellent hot workability, so it is suitable for parts such as those exemplified above. This brings about the very excellent effect of making it possible to significantly facilitate processing.

Claims (1)

[Claims] (1) In weight%, Cu: 30 to 80%, Mn: 1.0% or less, Al: 0.015% or less, C: 0.02% or less, [O]: 0.05% or less, [H ]: 0.003% or less, the remainder being substantially Fe. A Cu-Fe alloy with excellent hot workability.