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Nonferrous Alloys ( 비철금속 )

Nonferrous Alloys ( 비철금속 ). More expensive than ferrous metals. Applications: aluminium for aircraft bodies copper wire titanium for jet-engine turbine blades tantalum for rocket engines. Nonferrous Alloys( 비철금속 ). • Cu Alloys. • Al Alloys. Brass : Zn is subst. impurity.

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Nonferrous Alloys ( 비철금속 )

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  1. Nonferrous Alloys (비철금속) More expensive than ferrous metals. Applications: • aluminium for aircraft bodies • copper wire • titanium for jet-engine turbine blades • tantalum for rocket engines

  2. Nonferrous Alloys(비철금속) • Cu Alloys • Al Alloys Brass:Zn is subst. impurity -low r: 2.7 g/cm3 (costume jewelry, coins, -Cu, Mg, Si, Mn, Zn additions corrosion resistant) -solid sol. or precip. Bronze : Sn, Al, Si, Ni are strengthened (struct. subst. impurities aircraft parts (bushings, landing & packaging) gear) NonFerrous • Mg Alloys Cu-Be : r -very low : 1.7g/cm3 Alloys precip. hardened -ignites easily for strength - smartphone • Ti Alloys • Refractory metals -relativelylowr:4.5g/cm3 -high melting T’s vs 7.9 for steel • Noble metals -Nb, Mo, W, Ta -Ag, Au, Pt -reactiveathighT’s - oxid./corr. resistant - space applic.

  3. Copper alloys • Copper alloys(구리합금) have electrical and mechanical properties, corrosion resistance, thermal conductivity and wear resistance. • Applications are electronic components, springs and heat exchangers. Brass(황동)is an alloy of copper and zinc (Zn 30%). Applications are costume jewelry, coins, corrosion resistant. Bronze(청동) is an alloy of copper and tin (Sn 10% , Al, Si, Ni). Applications are bushings, landing gear.

  4. Aluminium alloys Factors for selecting Aluminum (Al) alloys are: • High strength to weight ratio ( 2.7 g/cm3) • Resistance to corrosion • High thermal and electrical conductivity • Ease of machinability • Non-magnetic Ex) A7075 A6061 A5052

  5. Magnesium alloys • Magnesium (Mg) is the lightest metal (1.7g/cm3). • It ignites easily. • Typical uses of magnesium alloys are the frame of electric device like as smart phone.

  6. Nickel alloys • Nickel (Ni) has strength, toughness, and corrosion resistance to metals. • Used in stainless steels and nickel-base alloys at chemical and food processing industry (Nikel200). • Inconel 600 (Cr 15% Fr8%) alloys are used for high temperature applications, such as jet-engine components and rockets.

  7. Superalloys • Superalloys (초합금) are high-temperature alloys use in jet engines and gas turbines. Ex) IN-100 -102, Inconel 625 718, MAR-M 200 432 …

  8. Titanium alloys • Titanium (Ti) is expensive, has high strength-to-weight ratio and corrosion resistance. Relatively low density 4.5 g/cm3. • Used as components for aircrafts, jet-engines, racing-cars and medical equipments. • Ex) Ti-6AI-4V

  9. Refractory metals • Refractory metals (고용융점 금속) have a high melting point and retain their strength at elevated temperatures. • Applications are electronics, nuclear power and chemical industries. • Molybdenum, columbium, tungsten, and tantalum (Nb, Mo, W, Ta) are referred to as refractory metal.

  10. Other nonferrous metals • Beryllium (Be) • Zirconium (Zr) • Low-melting-point (저 용융점) metals: - Lead (Pb, 납)- Zinc (Zn, 아연)- Tin (Sn, 주석) • Precious metals (귀금속):- Gold (Ag, 금)- Silver (Au, 은)- Platinum (Pt, 백금)

  11. Special metals and alloys • Shape-memory alloys • Amorphous alloys • Nanomaterials • Metal foams

  12. Korea Zink (고려아연) • Zinc (Zn) : Galvanized steel plate(pipe, wire), color steel plate, automobile part, machine/electronic part, anti-corrosion paint • Lead (Pb) : Automobile and industrial battery, electric wire coating, radiation shielder • Copper, God, Silver, Indium, nickel, bismuth, antimony trioxide, palladium, platinum, cadmium, gallium, germanium, tellurium, cobalt

  13. Poongsan (풍산) • Copper (Cu) : sheet & strips, tubes, rods, coin blanks, semiconductor leadframe

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