JPS58161745A - Copper alloy for radiator - Google Patents

Abstract

PURPOSE:To obtain a Cu alloy for a radiator provided with especially superior heat conductivity, corrosion resistance and toughness by adding restricted amounts of Pb and Si, Al, Mn or P. CONSTITUTION:This Cu alloy for a radiator consists of 0.001-1.0wt% Pb, 0.001-0.15wt% in total of one or more among Si, Al, Mn and P, and the balance Cu with accompanying impurities. The oxygen content may be limited to <=30ppm. In the restricted composition, Pb enhances the strength and corrosion resistance, and Si, Al, Mn and P enhance the control of the oxygen content and the corrosion resistance. By limiting the oxygen content to <=30ppm, the reduction of the toughness is prevented. This Cu alloy is superior to conventional Cu-Pb and Cu-Sn alloys in heat resistance, heat conductivity and toughness.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a steel alloy for automobile radiators, especially radiator fins, which has excellent thermal conductivity, corrosion resistance, and toughness.

Automobile radiators circulate heat between the engine and the radiator using liquid as a cooling medium to adjust the temperature of the engine, and radiator fins work to dissipate heat through tubes. Therefore, a steel alloy with high thermal conductivity has been conventionally used as a radiator material.

However, while the car is running, the radiator releases exhaust gas,
If the fins are exposed to salt-containing coastal air, or even 801 gas in factory air, the fins may corrode and significantly reduce the heat dissipation strength of the radiator.

The present invention is the result of research conducted in view of this.

pb aool-t, o weight bun, 81. A1
．． A steel alloy for radiators with excellent thermal conductivity and corrosion resistance, consisting of one or more selected from the group consisting of Mn and P, consisting of an (M~fi15 weight 0 and the remainder steel and impurities accompanying it); Oxygen content Vt50 ppm to improve thermal conductivity, corrosion resistance, and toughness
We have developed a steel alloy for radiators specified below.

The effect of the alloy components in the steel alloy for radiator fins of the radiator of the present invention and the reason for limiting the amount added will be explained. The reason why Pb is added is to improve strength and corrosion resistance, and the reason why the range is limited to α001 to 10 weight is because below α001 weight, the above effect can hardly be expected, and if it exceeds to weight This is because conductivity and processability are reduced.

The reason why Si, Al, Mn, and P are added is to control the amount of oxygen in the molten copper as a deoxidizing agent during melting and to improve the corrosion resistance. This is because if the weight is less than a15 weight, little effect can be expected, and if it exceeds a15 weight, the thermal conductivity decreases.The oxygen content is limited to 50 ppm or less.

If it exceeds 50 ppm, the toughness will deteriorate.

Next, examples of the alloy of the present invention will be described.

Example Alloys having the various compositions shown in Table 1 were melted and hot-pressured to form (
A plate having an LSI thickness was used for testing.

Corrosion resistance is measured using J
A salt water jet test was carried out under the specified conditions for 4 weeks, and then the surface was pickled with a 5-weight superior sulfuric acid solution, and the weight loss before and after the test was determined to determine the corrosion weight loss.

Thermal conductivity can be evaluated by measuring electrical conductivity, which is directly correlated with this. In addition, toughness is determined by repeated bending tests.
The evaluation was based on the number of bends until breakage. The results are shown in Table 2.

As can be seen from Table 2, the alloy of the present invention is an alloy with excellent heat resistance, thermal conductivity, and toughness.

Table 1 1IK2 table 202

Claims (2)

[Claims] (1) Pbaoo1~t, o weight - and 81.41
A steel alloy for a radiator comprising 91 or more selected from the group consisting of Mn and P in a total amount of α001 to 115 by weight, and the remainder @O and impurities associated therewith. (2) Pbα0 (11-1.0 wt- and 81.m1.
1 type or 2s selected from the group consisting of Mn and P
The total amount of the above is α001~α1s weight - and oxygen content S
A steel alloy for radiators consisting of less than Oppm and the balance steel and impurities accompanying it.