?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=PENGARUH+TEMPERATUR+AUSTENISASI+TERHADAP+STRUKTUR+MIKRO+DAN+NILAI+KEKERASAN+MATERIAL+14%25+Cr-+3%25+Ni-2%25+Mo-2%25+C+UNTUK+APLIKASI+BOLA+GERUS&rft.creator=Imaniar+Romaeni%2C+1217041019&rft.subject=Q+Science+(General)&rft.description=ABSTRAK+%0D%0A%0D%0APenelitian+ini+dilakukan+untuk+mengetahui+pengaruh+perlakuan+panas+berupa+sub-kritis%2Caustenisasi%2C+quenching++dan+tempering+terhadap+nilai+kekerasan+dari+material+besi+cor+putih+sebagai+pertimbangan+untuk+pengujian+nilai+ketahanan+aus+dari+produk+bola+gerus+lokal+dan+membandingkannya+dengan+produk+bola+gerus+luar+negeri.+Sampel+akan+diberikan+perlakuan+sub-kritis+pada+emperatur+700%C2%B0C+dengan+waktu+tahan+2+jam+dan+dilanjutkan+dengan+variasi+temperatur+austenisasi+yaitu+850%2C+950dan+1050%C2%B0C+dengan+waktu+tahan+masing-masing+sampel+adalah+5+jam.+Nilai+kekerasan+optimum+diperoleh+pada+temperatur+austenisasi++950%C2%B0C+yaitu+sebesar+68%2C3+HRC++dan+mengalami+penurunan+pada+suhu+1050%C2%B0C+hal+ini+dikarenakan+terjadinya+kelarutan+unsur+karbon+penyusun+pada+matrik.+Sampel+akan+di+berikan+perlakuan+panas+berupa+tempering+pada+suhu%0D%0A250%C2%B0Cdengan+waktutahan+2+jam.+Nilai+kekerasan+setelah+perlakuan+tempering+mengalami+penurunan+tetapi+nilai+laju+keausan+menjadi+lebih+baik+yaitu+sebesar+0%2C03+gr+bola+gerus+%2F+kg+produk+karena+kombinasi+penyusunnya+yaitu+kromium%2C+molybdenum+dan+nikel+yang+tinggi.%0D%0AKata+Kunci%3AAustenisasi%2Cbola+gerus%2C+udara+paksa.%0D%0A%0D%0AABSTRACT%0D%0AThis+study+was+conducted+to+determine+the+effect+of+heat+treatment+in+the+form+of+sub-critical%2C+austenization%2C+quenching+and+tempering+the+hardness+valuesof+the+white+cast+iron+material+as+consideration+for+testing+wear+resistance+of+local+and+foreign+products+as+grinding+balls.+Samples+was+treated++sub-critical+at+a+temperature+of+700%C2%B0C+with+a+hold+time+of+2+hours+and+continued+with+austenization+temperature+variation+of++850%2C+950++and+1050%C2%B0C+with+a+hold+time+of+each+sample+is+5+hours.+The+optimum+hardness+value+was+obtained+at+a+temperature+of+950%C2%B0C+austenization+in+the+amount+of+68.3+HRC+and+decreased+at+a+temperature+of+1050%C2%B0C.+It+is+because+the+solubility+of+carbon+elements+making+up+the+matrix.+Samples+will+treatedtempering+at+a+temperature+of+250+%C2%B0+C+with+a+hold+time+of+2+hours.+Hardness+valuesafter+tempering+treatment+has+decreased+but+the+valueofwear+ratemorethanit+up+to0.03+g+ball+grinding+%2F+kg+due+to+a+highcombination+of+chromium%2C+molybdenum+and+nickel.%0D%0AKey+words.Austenization%2Cforced+air%2C+grinding+ball.&rft.publisher=Fakultas+MIPA&rft.date=2017-02-27&rft.type=Skripsi&rft.type=NonPeerReviewed&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F26051%2F1%2FABSTRAK%2520IND%2520ING.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F26051%2F2%2FSKRIPSI%2520FULL%2520OKE.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F26051%2F3%2FSKRIPSI%2520TANPA%2520PEMBAHASAN.pdf&rft.identifier=++Imaniar+Romaeni%2C+1217041019++(2017)+PENGARUH+TEMPERATUR+AUSTENISASI+TERHADAP+STRUKTUR+MIKRO+DAN+NILAI+KEKERASAN+MATERIAL+14%25+Cr-+3%25+Ni-2%25+Mo-2%25+C+UNTUK+APLIKASI+BOLA+GERUS.++Fakultas+MIPA%2C+Universitas+lampung.+++++&rft.relation=http%3A%2F%2Fdigilib.unila.ac.id%2F26051%2F