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UTMUNIVERSITI TEKNOLOGI MALAYSIA
( FLUIDITY OF MOLTEN METAL)
FUNDAMENTAL OF CASTING
DISEDIAKAN OLEH:-
NAMA : NUR IZZATY BINTI ROSLI
NO. MATRIC : AP090139
SEKSYEN : 4 SPH 01
Keupayaan logam lebur memasuki/memenuhi
rongga acuan
Apakah definisi “Fluidity of Molten Metal”?
What?
What?
Apakah faktor
yang
mempengaruhi
“Fluidity of Molten
Metal”
Ciri-ciri
logam lebur.
Parameter
Tuangan
What?
Apakah ciri-ciri logam lebur yang mempengaruhi “Fluidity”
• Jika kelikatan dan sensitiviti logam lebur
terhadap suhu meningkat maka “Fluidity” akan
menurun.
Kelikatan (Viscosity)
• Ketegangan permukaan cecair logam yang
tinggi merendahkan “Fluidity”.
Ketegangan Permukaan
( Surface tension)
• Cecair logam yang mempunyai partikel pasir
yang tinggi menyebabkan peningkatan
kelikatan dan ia merendahkan “Fluidity”
Kemasukan
( Inclusions)
• Cecair logam yang memiliki julat pembekuan
yang pendek maka “Fluidity”nya lebih tinggi
dan sebaliknya.
Corak Pemejalan Aloi
(Solidification Pattern of Alloy)
How?
• Rekabentuk dan dimensi alas penggelincir, “Sprue”
dan tetingkat kesemuanya mempengaruhi “Fluidity.
Rekabentuk Acuan
(Mold Design)
• Rendah kadar tuangan logam lebur kedalam acuan
maka rendah “Fluidity” logam tersebut.
Kelajuan Tuangan
(Rate of Pouring)
• Penambahan haba aloi selepas titik pencairan
membantu “fluidity”dengan melambatkan pemejalan.
Darjah Kepanasan Lampau
(Degree of Superheat)
• Memberi kesan terus keatas kelikatan logam lebur.
Pindahan Haba
(Heat Transfer)
• Semakin tinggi konduktiviti termal dan permukaan
acuan yang kasar semakin rendah kadar “fluidity”
Ciri-ciri Bahan dan
Permukaan Acuan
Bagaimana “Casting Parameter” mempengaruhi “Fluidity”?
How?
Bagaimana untuk menguji “Fluidity”?
Spiral Mold Test
RUJUKAN
RUJUKAN BUKU
• Serope Kalpakijan & Steven R Schmid. 2009.
Manufacturing Engineering and Technology.
Prentice Hall
RUJUKAN INTERNET
• http://www.slideshare.net/corematerials/talat-
lecture-3205-the-fluidity-of-molten-metals
• http://www.egr.msu.edu/~pkwon/me477/castin
g.pdf
TAMAT

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Powerpoint spe 4602 (fluidity of molten metal)

  • 1. UTMUNIVERSITI TEKNOLOGI MALAYSIA ( FLUIDITY OF MOLTEN METAL) FUNDAMENTAL OF CASTING
  • 2. DISEDIAKAN OLEH:- NAMA : NUR IZZATY BINTI ROSLI NO. MATRIC : AP090139 SEKSYEN : 4 SPH 01
  • 3. Keupayaan logam lebur memasuki/memenuhi rongga acuan Apakah definisi “Fluidity of Molten Metal”? What?
  • 4. What? Apakah faktor yang mempengaruhi “Fluidity of Molten Metal” Ciri-ciri logam lebur. Parameter Tuangan
  • 5. What? Apakah ciri-ciri logam lebur yang mempengaruhi “Fluidity” • Jika kelikatan dan sensitiviti logam lebur terhadap suhu meningkat maka “Fluidity” akan menurun. Kelikatan (Viscosity) • Ketegangan permukaan cecair logam yang tinggi merendahkan “Fluidity”. Ketegangan Permukaan ( Surface tension) • Cecair logam yang mempunyai partikel pasir yang tinggi menyebabkan peningkatan kelikatan dan ia merendahkan “Fluidity” Kemasukan ( Inclusions) • Cecair logam yang memiliki julat pembekuan yang pendek maka “Fluidity”nya lebih tinggi dan sebaliknya. Corak Pemejalan Aloi (Solidification Pattern of Alloy)
  • 6. How? • Rekabentuk dan dimensi alas penggelincir, “Sprue” dan tetingkat kesemuanya mempengaruhi “Fluidity. Rekabentuk Acuan (Mold Design) • Rendah kadar tuangan logam lebur kedalam acuan maka rendah “Fluidity” logam tersebut. Kelajuan Tuangan (Rate of Pouring) • Penambahan haba aloi selepas titik pencairan membantu “fluidity”dengan melambatkan pemejalan. Darjah Kepanasan Lampau (Degree of Superheat) • Memberi kesan terus keatas kelikatan logam lebur. Pindahan Haba (Heat Transfer) • Semakin tinggi konduktiviti termal dan permukaan acuan yang kasar semakin rendah kadar “fluidity” Ciri-ciri Bahan dan Permukaan Acuan Bagaimana “Casting Parameter” mempengaruhi “Fluidity”?
  • 7. How? Bagaimana untuk menguji “Fluidity”? Spiral Mold Test
  • 8. RUJUKAN RUJUKAN BUKU • Serope Kalpakijan & Steven R Schmid. 2009. Manufacturing Engineering and Technology. Prentice Hall RUJUKAN INTERNET • http://www.slideshare.net/corematerials/talat- lecture-3205-the-fluidity-of-molten-metals • http://www.egr.msu.edu/~pkwon/me477/castin g.pdf