Metal Alloys Manufacturing Processes © 2013 Su-Jin Kim, GNU Nonferrous Alloys ( 비철금속 ) More...
-
Upload
lynne-franklin -
Category
Documents
-
view
223 -
download
3
Transcript of Metal Alloys Manufacturing Processes © 2013 Su-Jin Kim, GNU Nonferrous Alloys ( 비철금속 ) More...
Metal AlloysMetal AlloysManufacturing ProcessesManufacturing Processes
© 2013 Su-Jin Kim, GNU© 2013 Su-Jin Kim, GNU
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
Metal AlloysMetal AlloysManufacturing ProcessesManufacturing Processes
© 2013 Su-Jin Kim, GNU© 2013 Su-Jin Kim, GNU2
Nonferrous Alloys( 비철금속 )
NonFerrous Alloys
• Al Alloys-low : 2.7 g/cm3 -Cu, Mg, Si, Mn, Zn additions -solid sol. or precip. strengthened (struct.
aircraft parts & packaging)
• Mg Alloys-very low : 1.7g/cm3 -ignites easily -smartphone
• Refractory metals-high melting T’s -Nb, Mo, W, Ta• Noble metals
-Ag, Au, Pt -oxid./corr. resistant
• Ti Alloys-relatively low : 4.5 g/cm3
vs 7.9 for steel -reactive at high T’s -space applic.
• Cu AlloysBrass: Zn is subst. impurity (costume jewelry, coins, corrosion resistant)Bronze : Sn, Al, Si, Ni are subst. impurities (bushings, landing gear)Cu-Be: precip. hardened for strength
Metal AlloysMetal AlloysManufacturing ProcessesManufacturing Processes
© 2013 Su-Jin Kim, GNU© 2013 Su-Jin Kim, GNU
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.
Metal AlloysMetal AlloysManufacturing ProcessesManufacturing Processes
© 2013 Su-Jin Kim, GNU© 2013 Su-Jin Kim, GNU
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-magneticEx) A7075 A6061 A5052
Metal AlloysMetal AlloysManufacturing ProcessesManufacturing Processes
© 2013 Su-Jin Kim, GNU© 2013 Su-Jin Kim, GNU
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.
Metal AlloysMetal AlloysManufacturing ProcessesManufacturing Processes
© 2013 Su-Jin Kim, GNU© 2013 Su-Jin Kim, GNU
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.
Metal AlloysMetal AlloysManufacturing ProcessesManufacturing Processes
© 2013 Su-Jin Kim, GNU© 2013 Su-Jin Kim, GNU
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 …
Metal AlloysMetal AlloysManufacturing ProcessesManufacturing Processes
© 2013 Su-Jin Kim, GNU© 2013 Su-Jin Kim, GNU
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
Metal AlloysMetal AlloysManufacturing ProcessesManufacturing Processes
© 2013 Su-Jin Kim, GNU© 2013 Su-Jin Kim, GNU
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.
Metal AlloysMetal AlloysManufacturing ProcessesManufacturing Processes
© 2013 Su-Jin Kim, GNU© 2013 Su-Jin Kim, GNU
Other nonferrous metals
1. Beryllium (Be)2. Zirconium (Zr)3. Low-melting-point ( 저 용융점 ) metals:
- Lead (Pb, 납 )- Zinc (Zn, 아연 )- Tin (Sn, 주석 )
4. Precious metals ( 귀금속 ): - Gold (Ag, 금 )- Silver (Au, 은 )- Platinum (Pt, 백금 )
Metal AlloysMetal AlloysManufacturing ProcessesManufacturing Processes
© 2013 Su-Jin Kim, GNU© 2013 Su-Jin Kim, GNU
Special metals and alloys
1. Shape-memory alloys2. Amorphous alloys3. Nanomaterials4. Metal foams
Metal AlloysMetal AlloysManufacturing ProcessesManufacturing Processes
© 2013 Su-Jin Kim, GNU© 2013 Su-Jin Kim, GNU
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
Metal AlloysMetal AlloysManufacturing ProcessesManufacturing Processes
© 2013 Su-Jin Kim, GNU© 2013 Su-Jin Kim, GNU
Poongsan ( 풍산 )
• Copper (Cu) : sheet & strips, tubes, rods, coin blanks, semiconductor leadframe