?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=PENGARUH+VARIASI+TEMPERATUR+PADA+PROSES%0D%0AANNEALING+TERHADAP+NILAI+KEKERASAN+DAN%0D%0AKETANGGUHAN+BESI+COR+KELABU+FC25&rft.creator=FADHIL+AMANULLAH%2C+AKBAR&rft.subject=600+Teknologi+(ilmu+terapan)&rft.subject=620+Ilmu+teknik+dan+ilmu+yang+berkaitan&rft.description=Besi+cor+kelabu+FC25+adalah+salah+satu+material+baja+karbon+tinggi+yang+sedang%0D%0Abanyak+digunakan+sebagai+bahan+utama+pada+pembuatan+elemen+mesin+seperti%0D%0Asambungan+perpipaan%2C+poros%2C+engkol%2C+roda+gigi%2C+landasan+mesin.+Penelitian+ini%0D%0Abertujuan+untuk+mengetahui+pengaruh+variasi+temperatur+pada+proses+annealing%0D%0Aterhadap+sifat+mekanik+dan+struktur+mikro+Besi+Cor+Kelabu+FC25.+Penelitian+ini%0D%0Amenggunakan+spesimen+berupa+Besi+Cor+Kelabu+FC25+yang+diberikan+perlakuan%0D%0Apanas+annealing+dengan+variasi+temperatur+750oC%2C+850oC+dan+1000oC+dan+holding%0D%0Atime+30+menit%2C+kemudian+didinginkan+secara+lambat+didalam+furnace+selama+30+jam.%0D%0ASelanjutnya+dilakukan+pengujian+kekerasan+metode+vickers+dan+pengujian+impak%0D%0Ametode+charpy.+Hasil+uji+kekerasan+didapatkan+nilai+kekerasan+sebelum+dilakukan%0D%0Aperlakuan+panas+sebesa4+154%2C739849+kg%2Fmm2%0D%0A%0D%0A.+Hasil+uji+kekerasan+setelah+dilakukan%0D%0Aperlakuan+panas+annealing+dengan+temperatur+750oC%2C+850oC+dan+1000oC+sebesar%0D%0A152%2C662722+kg%2Fmm2%0D%0A%0D%0A%2C+150%2C3386871+kg%2Fmm2%0D%0A%0D%0A%2C+146%2C1269614+kg%2Fmm2%0D%0A%0D%0A.+Hasil+pengujian%0D%0Aimpak+didapatkan+energi+impak+sebelum+dilakukan+perlakuan+panas+sebesar+3+joule.%0D%0AHasil+energi+impak+setelah+dilakukan+perlakuan+panas+annealing+dengan+temperatur%0D%0A750oC%2C+850oC+dan+1000oC+sebesar+3%2C26+joule%2C+3%2C8+joule%2C+4%2C23+joule.+Pada%0D%0Apengamatan+struktur+mikro+menggunakan+Optical+Microscopy+(OM)+menunjukan%0D%0Aperubahan+fasa+grafit+flake+menjadi+grafit+nodular+dengan+butir+yang+lebih+besar.%0D%0A%0D%0AKata+Kunci+%3A+Besi+Cor+Kelabu+FC25%2C+Annealing%2C+Temperatur%2C+kekerasan%2C%0D%0Aketangguhan+dan+OM.%0D%0A%0D%0AFC25+gray+cast+iron+is+a+high+carbon+steel+material+that+is+widely+used+as+the+main%0D%0Amaterial+in+the+manufacture+of+machine+elements+such+as+pipe+fittings%2C+shafts%2C%0D%0Acranks%2C+gears%2C+machine+bads.+This+study+aimed+to+determine+the+effect+of%0D%0Atemperature+variations+in+the+annealing+process+on+the+mechanical+properties+and%0D%0Amicrostructure+of+FC25+Gray+Cast+Iron.+This+research+used+specimens+in+the+form%0D%0Aof+FC25+Gray+Cast+Iron+which+were+given+heat+annealing+treatment+with%0D%0Atemperature+variations+of+750oC%2C+850oC+and+1000oC+and+a+holding+time+of+30%0D%0Aminutes%2C+then+cooled+slowly+in+a+furnace+for+30+hours.+Subsequently%2C+Vickers%0D%0Ahardness+testing+and+Charpy+method+impact+testing+were+carried+out.+The+hardness%0D%0Atest+results+showed+that+the+hardness+value+before+heat+treatment+was+carried+out%0D%0Awas+154%2C739849+kg%2Fmm2.+The+hardness+test+results+after+annealing+heat+treatment%0D%0Aat+temperatures+of+750oC%2C+850oC+and+1000oC+were+152%2C662722+kg%2Fmm2%0D%0A%2C%0D%0A%0D%0A150%2C3386871+kg%2Fmm2%0D%0A%0D%0A%2C+146%2C1269614+kg%2Fmm2%0D%0A%0D%0A.+The+impact+test+results+showed+that+the%0D%0Aimpact+energy+before+heat+treatment+was+carried+out+was+3+joules.+The+impact%0D%0Aenergy+results+after+annealing+heat+treatment+with+temperatures+of+750oC%2C+850oC%0D%0Aand+1000oC+were+3%2C26+joules%2C+3%2C8+joules%2C+4%2C23+joules.+Observation+of+the%0D%0Amicrostructure+using+Optical+Microscopy+(OM)+shows+a+change+in+the+flake%0D%0Agraphite+phase+to+become+nodular+graphite+with+larger+grains.%0D%0AKeywords%3A+FC25+Gray+Cast+Iron%2C+Annealing%2C+Temperature%2C+hardness%2C+toughness%0D%0Aand+OM.&rft.publisher=FAKULTAS+TEKNIK&rft.date=2024-07-09&rft.type=Skripsi&rft.type=NonPeerReviewed&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F82595%2F1%2FFILE%2520ABSTRAK%2520-%2520fadhil%2520amanullah%2520Akbar.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F82595%2F2%2FSKRIPSI%2520FULL%2520TANPA%2520LAMIRAN%2520ISI%2520-%2520fadhil%2520amanullah%2520Akbar.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F82595%2F3%2FFILE%2520TANPA%2520BAB%2520PEMBAHASAN%2520DAN%2520LAMPIRAN%2520-%2520fadhil%2520amanullah%2520Akbar.pdf&rft.identifier=++FADHIL+AMANULLAH%2C+AKBAR++(2024)+PENGARUH+VARIASI+TEMPERATUR+PADA+PROSES+ANNEALING+TERHADAP+NILAI+KEKERASAN+DAN+KETANGGUHAN+BESI+COR+KELABU+FC25.++FAKULTAS+TEKNIK%2C+UNIVERSITAS+LAMPUNG.+++++&rft.relation=http%3A%2F%2Fdigilib.unila.ac.id%2F82595%2F