JPS6092439A - Heat-resistant copper alloy with high strength and electric conductivity - Google Patents

Abstract

PURPOSE:To obtain a Cu alloy with superior heat resistance, mechanical strength and electric conductivity by adding specified amounts of Fe, Mg and P to Cu. CONSTITUTION:The composition of a Cu alloy is composed of, by weight, 0.02- 3% Fe, 0.02-3% Mg, P and the balance Cu. The amount of P is 25-80% of the amount of Fe and 70-90% of the amount of Mg. The Cu alloy contains Fe-P, Mg-P and (Fe, Mg)-P precipitated finely in the Cu matrix and has superior heat resistance, mechanical strength and electric conductivity, so it is especially suitable for use as a material for a radiator and parts for electric, electronic and communications apparatus.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a copper alloy that has excellent heat resistance, mechanical strength, and high sB, and has a strength of 350 to 450.
The present invention relates to a copper alloy that can maintain a predetermined level of strength even after the temperature is raised to ℃.

The copper alloy in each comb has been used for a variety of purposes.

Recently, attempts have been made to add small amounts of alloying elements to increase mechanical strength and heat resistance while maintaining copper's excellent conductivity, and with the development of these alloys, the uses of copper alloys will continue to expand. It is in.

Recently, electric wire conductors, lead frames, connectors,
There is an increasing demand for copper alloys with excellent heat resistance, mechanical strength, and high electrical conductivity (high thermal conductivity) for parts of electrical, electronic, and communication equipment such as switching elements, spring materials, tube materials, radiator materials, and other uses. ing. An example of an alloy used for these purposes is a Cu-Fe-(P*B) alloy. This alloy contains F''e-P, F'' in the copper matrix.
By precipitating and dispersing an intermetallic compound of e-B or Fe-P-B as fine crystals, heat resistance and mechanical strength are improved while maintaining high conductivity. Although this alloy has generally improved heat resistance and mechanical strength, in recent years it has shown high tensile strength at around 100°C as a material for electronic/communication/electrical equipment parts and radiator materials, and even after heating up to 350-450°C, e.g. 40kg/1m
' Electrical conductivity (
Thermal conductivity) copper alloys are being developed, and the above-mentioned Cu-Fe-(P, B) alloys do not have sufficient performance for these applications. Strength and conductivity exhibit contradictory tSl directions, and it is difficult to find an inexpensive copper alloy that maintains strength at a constant level of Di without sacrificing conductivity.
A satisfactory copper alloy has not yet been obtained.

Therefore, one object of the present invention is to provide a tetraelectric (thermally conductive) copper alloy that exhibits little decrease in strength even after the temperature rises to 350 to 450°C.

LIIJ Nagisa et al. conducted 14 investigations on the precipitation status of 4M intermetallic compounds and found that 7 were found in the silk matrix.
e-P, Mg7P, (Ii'e, Mg)
It has been found that a copper alloy in which -P is finely precipitated is suitable for the above purpose.

Unexploded IJl is thus made into a copper alloy particularly suitable for electrical, electronic and communication equipment parts and radiator moons, with Fe,
Contains Mg and Ir gold, the content of which is F”e: o,
0 2 ~ 37 fL: M % Mg: o, o 2 ~ 3 layers P: 25 ~ 80 layers for Fe content + 70 ~ 90 layers for Mg content → HH6 outside ← 壬 → → Cap ~
The present invention provides a heat-resistant, high-strength, highly conductive copper alloy characterized in that l← and the remainder is copper.

In this alloy, the Fe content is set to 0.02 to 3% by weight, but if the content is less than 0.02%, the effect will be small, while if the content exceeds 3M, the electrical conductivity (thermal conductivity) will decrease significantly. It's for a reason. The reason why the Mg content was 0.02 to 3% by weight was 0.
．． If it is less than 0.02% by weight, the effect will be small, while if it exceeds 3% by weight, the conductivity will decrease and the castability will also deteriorate. The P content is 25 to 25% relative to the existing F'e content.
Adding 80% of Mg is effective for forming fine metal mj compounds, and adding 70 to 90% of Mg
Jlf country chi is also effective. J, -18 and Mg
If P is added in an amount exceeding the above-mentioned upper limit relative to K, unreacted P will remain, which will actually impair electrical conductivity (thermal conductivity).

The present invention will be explained below based on experimental examples.

[Experiment example]

After melting the octopus under a charcoal covering in a high-frequency bath furnace, l+'e, Mg and P were added to obtain a uniform molten metal. In order to remove Mg, sufficiently deoxidized copper was used as the copper. The molten metal was poured into a carbon mold to produce an ingot with a diameter of 130 mm and a length of 700 mm. In order to prevent oxidation of the alloy during casting, work was carried out while spraying Ar gas onto the hot water tap and the hot water pan. After cutting the irregular Jf ingot and finishing the surface, it was hot extruded at about 900° C. to 1 degree A and cooled with water to obtain a rough wire with a diameter of 11 (t). The conductivity and tensile strength of the wires were measured after cold drawing and heat treatment.The following four types of samples were used.The results are shown together with the conductivity.

Sample M g Ir' c P Conductivity (1 RO 04 0.05 0.07 842 0, [I7 U,
09 0.1 813 0, 09 0.10 0.14
814 0.15 [L15 0.1682 The tensile strength measurement results are shown in the graph of the drawing. The tensile strength is determined by the value after holding at each temperature for 1 hour. Samples 2 to 4 not only showed a high tensile strength of over 56 Kg/2 at 100°C for 1 hour, but also maintained a tensile strength well over 40 Kf/2 even after 1 hour at 400°C. Samples 2 to 4 at the same time.
maintains a conductivity of over 80%.

[Brief explanation of the drawing]

The drawing is a graph showing the relationship between heat treatment and tensile strength of samples 1 to 40 alloys. ,'-to same Kurahashi 暎゛゛+-5-71

Claims (1)

[Claims] 1) Contains FesMg and P, the content of which is F.:
0.0 2-5 claw amount % Mg: α02-5 Jl (amount % P: F@; 25-80 weight M% + M for Flit
It is said that gj^J'I4 has a 70-90% influence,
A heat-resistant, high-strength, conductive copper fitting characterized by the remainder being made of copper.