Copper alloy material
A technology for alloy materials and plates, applied in the field of Cu alloy materials, can solve the problems of coarse precipitates, unsuitable for mass production, etc., and achieve the effects of excellent electrical conductivity and excellent workability
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Embodiment 1
[0141] The Cu alloy having the chemical composition shown in Table 1 was vacuum-melted in a high-frequency melting furnace, and cast into a steel mold to obtain an ingot with a thickness of 50 mm, a width of 100 mm, and a height of 200 mm. As rare earth elements, simple substances of each element or mixed rare earth metals are added. For a part of the sample, the temperature change during the cooling process after casting is measured by a thermocouple installed on the inner wall of the mold, and the cooling curve at the center of the slab is obtained by using it together with the heat transfer analysis, and the average cooling rate before cooling to 600°C The speed is 2°C / s. In addition, in Comparative Example 36, it was cast into a sand mold and tested to reduce the cooling rate. In this case, the average cooling rate until cooling to 600°C was 0.2°C / s.
[0142] Regarding Test Nos. 1 to 35, the riser portion was cut and removed, and then, after heating to 900° C., hot forge...
Embodiment 2
[0151] Cu alloys having the chemical compositions (three types) shown in Table 2 were vacuum-melted in a high-frequency melting furnace, and cast pieces with a thickness of 30 mm and a width of 100 mm were obtained by continuous casting using a graphite mold directly connected to the holding furnace.
[0152] 〔Table 2〕
[0153]
[0154] Thereafter, each Cu alloy was processed and heat-treated by three different methods A, B, and C shown in Table 3, and thin strips of test numbers 41-49 were obtained.
[0155] 〔table 3〕
[0156]
[0157] For the thin strip thus produced, according to the aforementioned measurement method, the particle size of the precipitates and inclusions and the total number of particles per unit area N (mm -2 ), tensile strength TS (MPa), ductility El (%), electrical conductivity IACS (%) and bending workability B in the 90° bending test 90 . Further, from these values, the balance between tensile strength TS and electrical conductivity IACS (TS / IA...
Embodiment 3
[0160] The Cu alloy having the chemical composition shown in Table 4 was vacuum-melted in a high-frequency melting furnace, and cast into a steel mold to obtain an ingot with a diameter of 70 mm and a height of 170 mm. As rare earth elements, simple substances of each element or mixed rare earth metals are added.
[0161] 〔Table 4〕
[0162] Table 4
[0163]
[0164] The riser portion was cut and removed, and then hot forged to a diameter of 30 mm after heating to 900°C. In order to remove scale, the surface is ground, then heated to 250°C, and warm rolled. In addition, solution heat treatment was performed at 850° C. for 10 minutes, and cold rolling was performed until the diameter became 15 mm. Furthermore, an aging treatment was performed at 400° C. for 8 hours to obtain a wire rod.
[0165] For the wire rod produced in this way, according to the above-mentioned measuring method, the particle size of the precipitates and inclusions and the total number of particles pe...
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Abstract
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