Poongsan Corporation

Poonsgan Corporation

In Dal Kim

Dong Woo Lee

Dae Hyun Kim

Sang Young Choi

Bo Min Jeon

Ji Hoon Lee

The present invention relates to a method of manufacturing a high purity copper (Cu) powder material useable in fabricating a sputtering target material for electronic industrial applications, for example a penetrator liner. The foregoing method has a configuration of using an apparatus composed of a raw material feeder, a plasma torch and a reactor to prepare a metal powder, and includes steps of passing a Cu powder having an average particle diameter of 30 to 450 &#x3bc;m through the thermal plasma torch at an introduction rate of 2 to 30 kg/hr, to thereby fabricate a Cu powder having an average particle diameter of 5 to 300 &#x3bc;m.

Production method for high purity copper powder using a thermal plasma

A copper alloy includes Si to facilitate deoxidation, and can be easily manufactured even when including elements such as Cr or Sn. The copper alloy has high conductivity and high workability without negatively affecting the tensile strength. The copper alloy contains 0.2 to 0.4 wt % of Cr, 0.05 to 0.15 wt % of Sn, 0.05 to 0.15 wt % of Zn, 0.01 to 0.30 wt % of Mg, 0.03 to 0.07 wt % of Si, with the remainder being Cu and inevitable impurities. A method for manufacturing the copper alloy includes obtaining a molten metal having the described composition; obtaining an ingot; heating the ingot at a temperature of 900-1000&#xb0; C. to perform a hot rolling process; cold rolling; performing a first aging process at a temperature of 400-500&#xb0; C. for 2 to 8 hours; cold rolling; and performing a second aging process at a temperature of 370-450&#xb0; C. for 2 to 8 hours.

Copper alloy with high strength and high conductibility, and method for manufacturing same

This invention relates to a high strength, high electrical conductivity copper alloy having excellent mechanical and physical properties, including thermal softening resistance, in which precipitate particles are finely dispersed (growth of the precipitate is suppressed), and the production process. The alloy is the precipitation suppressed copper alloy consisted of 0.5.about.4.0 wt % nickel, 0.1.about.1.0 wt % silicon, 0.05.about.0.8 wt % tin (Sn) and balance copper and inevitable impurities, wherein sizes of precipitate particles are below 0.5 .mu.m. The production process includes the steps of melting and casting raw materials, surface machining and cold rolling of the ingot, subjecting the cold rolled ingot to a precipitation process at a temperature ranging 450.about.520 deg. C. for 5.about.12 hours, cold rolling the precipitation processed material, and subjecting the cold rolled material to a tension annealing process at a temperature ranging 350.about.550 deg. C. for below 90 seconds.

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Gyeonggi-do, South Korea

In Dal Kim