?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=PENGARUH+VARIASI+KEKENTALAN+MEDIA+PENDINGIN+%0D%0AOLI+PADA+PROSES+QUENCHING+BAJA+AISI+1045+%0D%0ATERHADAP+SIFAT+MEKANIS+KEKERASAN+%0D%0AKETANGGUHAN+DAN+STRUKTUR+MIKRO&rft.creator=Bani+Ahmad%2C+1215021022&rft.subject=620+Ilmu+teknik+dan+ilmu+yang+berkaitan&rft.description=Baja+adalah+sebuah+senyawa+antara+besi+(Fe)+dan+carbon+(C)%2C+dimana+sering+juga+ditambahkan%0D%0Aunsur+lain+untuk+mendapatkan+sifat-sifat+tertentu+yang+dikehendaki.+Baja+AISI+1045+merupakan+%0D%0Asalah+satu+produk+jenis+baja+paduan+sedang%2C+pada+baja+AISI+1045+ini+banyak+digunakan+pada%0D%0Akomponen+permesinan+dan+juga+pada+konstruksi%2C+sebagai+dasar+bahan+pembuatan+rangka+mesin%2C+%0D%0Abahan+dasar+gear%2C+dan+batang+penghubung+piston+pada+kendaraan.+Tujuan+dari+penelitian+antara+%0D%0Alain+adalah+Untuk+mengetahui+karakteristik+sifat+mekanis+kekerasan+dan+ketangguhan+baja+AISI+%0D%0A1045+medium+carbon+steel+akibat+proses+heat+treatment+dengan+proses+quenching.+Quenching%0D%0Adengan+media+pendinginan+oli+SAE+20W-40%2C+40W%2C+90W+dan+hidro+karbon+(oli+bekas).+Untuk%0D%0Amengetahui+sifat+mekanis+kekuatan+impact%2C+kekerasan+dan+struktur+mikro.+Metode+penelitian+%0D%0Ayang+dilakukan+dengan+preparasi+spesimen+sesui+standar+ASTM%2C+lalu+tahapan+proses+Heat+%0D%0ATreatment+dengan+holding+time+30+menit%2C+lalu+ke+proses+pendinginan+secara+cepat+(Quenching)+%0D%0Adengan+variasi+viscosity+media+oli.+Selanjutnya+untuk+mengetahui+sifat+mekanis+uji+kekerasan+%0D%0ARockwell%2C+Impact+(charpy)%2C+dan+Struktur+Mikro.+%0D%0AHasil+dari+pengujian+baja+AISI+1045+yang+telah+dilakukan+terdapat+perubahan+sifat+mekanis+pada+%0D%0Aproses+heat+treatment+dengan+temperatur+850o%0D%0AC+dan+holding+time+30+menit+lalu+di+proses+%0D%0Aquenching+dengan+variasi+viscosity+oli+yaitu+nilai+kekerasan+rata-rata+tertinggi+sebesar+80%2C8+HRB+%0D%0Apada+media+oli+bekas%2C+dimana+pada+oli+bekas+yang+digunakan+adalah+oli+bekas+kendaraan+mobil+%0D%0Adengan+tingkat+kekentalan+awalnya+40W+dengan+jangka+pakai+2+bulan%2C+lalu+pada+ketangguhan+%0D%0Anya+terbilang+getas+dengan+harga+impak+sebesar+0%2C276+j%2Fmm2%0D%0A.+Tingkat+ketangguhan+tertinggi+atau+%0D%0Asifat+dari+spesimen(ulet)+dengan+kekentalan+media+oli+SAE+90W+didapat+rata-rata+harga+impak+%0D%0Asebesar+0%2C783+j%2Fmm2%0D%0A.+Pada+oli+bekas+struktur+mikro+terdapat+fasa+bainit+dan+mendominasi+fasa+%0D%0Amartensit+sehingga+pengujian+kekerasa+nya+sangat+tinggi.+Dan+pada+struktur+mikro+pada+oli+SAE+%0D%0A90W+terdapat+fasa+bainit%2C+fasa+martensit+dan+mendominasi+terdapat+fasa+pearlit+sehingga+%0D%0Amembuat+spesimen+yang+telah+di+uji+impact+(charpy)+bersifat+ulet.%0D%0AKata+kunci+%3A+quenching%2C+AISI+1045%2C+kekerasan%2C+impak%2C+dan+struktur+mikro.%0D%0ASteel+is+a+compound+between+iron+(Fe)+and+carbon+(C)%2C+where+often+other+elements+are+%0D%0Aalso+added+to+obtain+certain+desired+characteristics.+AISI+1045+steel+is+one+of+the+types+of+%0D%0Amedium+alloy+steel%2C+the+AISI+1045+steel+is+widely+used+in+machining+components+and+also+%0D%0Ain+construction%2C+as+a+basis+for+making+engine+frames%2C+basic+gear%2C+and+connecting+rods+for+%0D%0Apistons+in+vehicles.+The+purpose+of+the+study%2C+among+others%2C+is+to+determine+the+%0D%0Amechanical+characteristics+of+the+hardness+and+toughness+of+AISI+1045+steel+carbon+steel+%0D%0Amedium+due+to+the+heat+treatment+process+with+the+quenching+process.+Quenching+with+%0D%0ASAE+20W-40%2C+40W%2C+90W+and+hydro+carbon+oil+cooling+media+(used+oil).+To+find+out+the+%0D%0Amechanical+properties+of+impact+strength%2C+hardness+and+microstructure.+The+research+%0D%0Amethod+was+carried+out+by+specimen+preparation+according+to+ASTM+standards%2C+then+the+%0D%0Astages+of+the+Heat+Treatment+process+with+a+holding+time+of+30+minutes%2C+then+to+the+%0D%0Acooling+process+quickly+(Quenching)+with+a+variation+of+oil+media+viscosity.+Next+to+find+%0D%0Aout+the+mechanical+properties+of+the+Rockwell+hardness+test%2C+Impact+(charpy)%2C+and+Micro+%0D%0AStructure.%0D%0AThe+results+of+AISI+1045+steel+testing+that+have+been+carried+out+there+are+changes+in+%0D%0Amechanical+properties+in+the+heat+treatment+process+with+temperature+850o%0D%0AC+and+holding+%0D%0Atime+30+minutes.+then+in+the+process+of+quenching+with+variations+in+oil+viscosity+which+is+%0D%0Athe+highest+average+hardness+value+of+80.8+HRB+on+used+oil+media%2C+where+used+oil+is+used+%0D%0Aoil+used+by+vehicles+with+an+initial+viscosity+level+of+40W+with+a+life+span+of+2+months%2C+%0D%0Athen+the+toughness+is+fairly+brittle+with+an+impact+price+of+0%2C276+j%2Fmm2%0D%0A.+The+highest+level+%0D%0Aof+toughness+or+the+nature+of+the+specimen+(ductile)+with+a+viscosity+of+SAE+90W+oil+%0D%0Amedia+obtained+an+average+impact+price+of+0%2C783+j%2Fmm2%0D%0A.+In+micro+structure+used+oil+there+%0D%0Ais+a+bainite+phase+and+dominates+the+martensite+phase+so+that+the+hardness+testing+is+very+%0D%0Ahigh.+And+in+the+micro+structure+in+SAE+90W+oil+there+is+bainite+phase%2C+martensitic+phase+%0D%0Aand+dominates+there+is+pearlite+phase+so+that+making+the+specimens+that+have+been+tested+%0D%0Afor+impact+(charpy)+is+resilient.%0D%0AKeywords%3A+quenching%2C+AISI+1045%2C+hardness%2C+impact%2C+and+microstructure&rft.publisher=FAKULTAS+TEKNIK&rft.date=2019&rft.type=Skripsi&rft.type=NonPeerReviewed&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F58704%2F1%2FABSTRAK-ABSTRACT.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F58704%2F2%2FSKRIPSI%2520FULL%2520TEKS.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F58704%2F3%2FSKRIPSI%2520TANPA%2520BAB%2520PEMBAHASAN.pdf&rft.identifier=++Bani+Ahmad%2C+1215021022++(2019)+PENGARUH+VARIASI+KEKENTALAN+MEDIA+PENDINGIN+OLI+PADA+PROSES+QUENCHING+BAJA+AISI+1045+TERHADAP+SIFAT+MEKANIS+KEKERASAN+KETANGGUHAN+DAN+STRUKTUR+MIKRO.++FAKULTAS+TEKNIK%2C+UNIVERSITAS+LAMPUNG.+++++&rft.relation=http%3A%2F%2Fdigilib.unila.ac.id%2F58704%2F