JPS6017010B2 - Copper alloy for radiators - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automobile radiator having high strength, excellent corrosion resistance, and thermal conductivity, and particularly to a steel alloy for radiator fins.

Automotive 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 is used as the material for the secondary radiator. However, in recent years, there has been a strong desire to reduce the weight of automobiles as an energy-saving measure, and there has been a trend to reduce the thickness of radiator fins. Furthermore, if the radiator is exposed to exhaust gas, salty coastal air, or even S02 gas from factory air while the car is running, the fins may corrode, significantly reducing the heat dissipation performance and strength of the radiator. . Therefore, a steel alloy for radiator fins that has high strength, excellent corrosion resistance, and thermal conductivity is desired.

In view of this, the present invention was developed as a result of various studies conducted on Pb.
o. 001-1.0% by weight, Feo. 001-0.5% by weight, PO. We have developed a steel alloy for radiators with high strength, corrosion resistance, and excellent thermal conductivity, consisting of 0.001 to 0.1% by weight, the balance being Cu and impurities accompanying it.

The effect of the alloy components in the steel alloy for radiators of the present invention and the reason for limiting the amount added will be explained.

The purpose of adding Pb is to improve strength and corrosion resistance, and the range is 0.001 to 1. The reason why the content was limited to 0.001% by weight was because the above effects could hardly be expected; and 1. This is because if the weight percentage exceeds , thermal conductivity and processability will decrease.

The reason why Fe and P are added is to form iron phosphorus pentide in steel to increase strength and heat resistance.
The component range of e was set to 0.001 to 0.5% by weight because
This is because if it is less than 0.001% by weight, no improvement in heat resistance or strength can be expected, and if it exceeds 0.5% by weight, thermal conductivity,
This is because workability is reduced. PO component range to 0.0
The reason why the amount is set at 0.01 to 0.1% by weight is because no effect can be expected if it is less than 0.001% by weight, and because if it exceeds 0.1% by weight, thermal conductivity and sardine properties will decrease. Next, examples of the alloy of the present invention will be described.

EXAMPLES Alloys having the compositions shown in Table 1 were manufactured and cold rolled with hot rolling and appropriate annealing.
A plate with a thickness of 5 ribs was used for the test.

Corrosion resistance was determined by JI on a sample of 15 skins x 100 sides of a plate thickness of 0.5 ribs.
A salt water mist test was conducted for 4 weeks under the conditions specified in SZ2371, and then the surface was pickled with a 5% by weight sulfuric acid solution, and the corrosion weight loss was determined from the weight change before and after the test and evaluated.

Strength was evaluated by tensile strength and elongation.

Thermal conductivity was evaluated by measuring electrical conductivity, which has a positive correlation with thermal conductivity. Note that the conductivity measurement was performed in accordance with JIS Date 0505. The results are shown in Table 2. As is clear from Table 2, the alloy of the present invention is a Cu-
It can be seen that this is an excellent alloy with high strength, good corrosion resistance, and no decrease in thermal conductivity compared to Pq alloy and Cu-Sn alloy.

Claims (1)

[Claims] 1 Steel alloy for radiator consisting of 0.001 to 1.0% by weight of Pb, 0.001 to 0.5% by weight of Fe, 0.001 to 0.1% by weight of P, and the balance being Cu and impurities associated therewith. .