?url_ver=Z39.88-2004&rft_id=1615021014&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=PENGARUH+VARIASI+TEMPERATUR+AUSTEMPERING+PADA+BESI%0D%0ACOR+KELABU+FC+25+TERHADAP+KEKUATAN+IMPAK+&rft.creator=PRANIKO+RAYENDA+PUTRA+%2C+1615021014&rft.subject=600+Teknologi+(ilmu+terapan)&rft.description=Besi+cor+kelabu+FC+25+merupakan+paduan+antara+besi+(Fe)+dan+karbon+(C)+dengan%0D%0Akandungan+karbon+berkisar+antara+2-6%2C67%25.+Besi+cor+juga+mengandung+unsur+lain%0D%0Ayaitu+silikon+(Si)%2C+mangan+(Mn)%2C+fosfor+(P)+dan+belerang+(S).+Penelitian+ini%0D%0Abertujuan+untuk+mengetahui+pengaruh+variasi+temperatur+austempering+dan%0D%0Aperubahan+struktur+mikro+pada+besi+cor+kelabu+FC+25.+Austempering+adalah+suatu%0D%0Aproses+yang+terjadi+pada+besi+cor+yang+sudah+mengalami+austenisasi+kemudian%0D%0Adiquenching+dengan+cepat+selanjutnya+dipanaskan+kembali+pada+temperatur+yang%0D%0Atelah+ditentukan.+Variasi+temperatur+austempering+pada+penelitian+ini+adalah%0D%0A300%C2%B0C%2C+350%C2%B0C+dan+400%C2%B0C+dengan+waktu+penahanan+selama+60+menit.+Adapun%0D%0Ahasil+pengujian+yang+didapatkan+setelah+dilakukan+proses+austempering+adalah%0D%0Aterjadi+peningkatan+terhadap+ketangguhannya.+Nilai+tertinggi+energi+impak+yang%0D%0Adiperoleh+pada+temperatur+300%C2%B0C+sebesar+4+Joule%2C+selanjutnya+pada+temperatur%0D%0A350%C2%B0C+sebesar+4%2C5+Joule%2C+kemudian+pada+temperatur+400%C2%B0C+sebesar+5+Joule.+Pada%0D%0Apengamatan+struktur+mikro+menggunakan+Optical+Microscopy+(OM)%0D%0Amenunjukkan+perubahan+fasa+dari+ferit+dan+perlit+menjadi+fasa+ausferit.%0D%0A+%0D%0AKata+Kunci+%3A+Besi+Cor+Kelabu+FC+25%2C+Austempering%2C+Ketangguhan+dan+OM.+%0D%0AFC+25+gray+cast+iron+is+an+alloy+between+iron+(Fe)+and+carbon+(C)+with+a+carbon%0D%0Acontent+ranging+from+2-6.67%25.+Cast+iron+also+contains+other+elements+namely%0D%0Asilicon+(Si)%2C+manganese+(Mn)%2C+phosphorus+(P)%2C+and+sulfur+(S).+The+study+aimed+to%0D%0Adetermine+the+effect+of+temperature+variations+in+austempering+and+changes+in%0D%0Amicrostructure+in+FC+25+gray+cast+iron.+Austempering+is+a+process+that+occurs+in%0D%0Acast+iron+that+has+undergone+austenitization+and+then+quenched+quickly+and+then%0D%0Areheated+at+a+predetermined+temperature.+The+variations+in+austempering%0D%0Atemperatures+in+this+study+were+300%C2%B0C%2C+350%C2%B0C%2C+and+400%C2%B0C+with+a+holding+time+of%0D%0A60+minutes.+As+for+the+results+of+testing+obtained+after+the+austempering+process+is%0D%0Aan+increase+in+its+toughness.+The+highest+value+of+impact+energy+obtained+at+300+%C2%B0%0D%0AC+is+4+J%2C+then+at+350+%C2%B0+C+of+4.5+J%2C+then+at+400+%C2%B0+C+of+5+J.+Microstructure%0D%0Aobservations+using+Optical+Microscopy+(OM)+show+phase+changes+from+ferrite%0D%0Aand+pearlite+to+ausferrite+phase.%0D%0A%0D%0A%0D%0A+%0D%0AKeywords%3A+Gray+Cast+Iron+FC+25%2C+Austempering%2C+Toughness%2C+and+OM.+&rft.publisher=FAKULTAS+TEKNIK&rft.date=2022-04-07&rft.type=Skripsi&rft.type=NonPeerReviewed&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F63224%2F1%2FABSTRAK.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F63224%2F2%2FSKRIPSI%2520FULL.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F63224%2F3%2FSKRIPSI%2520TANPA%2520PEMBAHASAN.pdf&rft.identifier=++PRANIKO+RAYENDA+PUTRA+%2C+1615021014++(2022)+PENGARUH+VARIASI+TEMPERATUR+AUSTEMPERING+PADA+BESI+COR+KELABU+FC+25+TERHADAP+KEKUATAN+IMPAK.++FAKULTAS+TEKNIK%2C+UNIVERSITAS+LAMPUNG.+++++&rft.relation=http%3A%2F%2Fdigilib.unila.ac.id%2F63224%2F