?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=PENGARUH+WAKTU+HOLDING+PADA+PROSES+PACK+CARBURIZING%0D%0AARANG+CANGKANG+KELAPA+SAWIT+TERHADAP+KEKERASAN%0D%0A%0D%0ABAJA+KARBON+RENDAH+ST-41&rft.creator=IKHWAN+ZUMARAKHMAN%2C+1115021042&rft.subject=620+Ilmu+teknik+dan+ilmu+yang+berkaitan&rft.description=Penggunaan+baja+karbon+rendah+pada+kehidupan+sehari-hari+sangatlah+banyak%2C+baik+dalam%0D%0Abidang+pembangunan+maupun+bidang+teknik.+Ada+banyak+hal+yang+membuat+bahan+ini%0D%0Abanyak+diperanankan+oleh+khalayak%2C+antara+lain+karena+jumlahnya+yang+banyak+dialam+ini.%0D%0ASifat+mekaniknya+yang+baik%2C+serta+mudah+pengerjaannya+bisa+dengan+metode+pengecoran%0D%0Aataupun+dengan+metode+permesinan+sehingga+dapat+dibuat+sesuai+peruntukan+dan+harga+yang%0D%0Arelatif+murah.+Kekerasan+merupakan+sifat+mekanik+dari+baja+yang+berkaitan+dengan+ketahanan%0D%0A%0D%0Aaus%2C+komponen-komponen+mesin+yang+mengalami+gesekan+pada+fungsi+kerjanya+secara+terus-%0D%0Amenerus+seperti+piston%2C+roda+gigi%2C+dan+poros+maka+permukaannya+akan+mengalami+keausan%0D%0A%0D%0Ayang+akan+berdampak+pada+kerusakan+komponen+tersebut.+Oleh+sebab+penelitian+ini%0D%0Adilakukan+untuk+mengetahui+pengaruh+arang+cangkang+kelapa+sawit+terhadap+kekersasan+baja%0D%0AST-41.+Carburizing+merupakan+proses+pengerasan+permukaan+logam+menggunakan+suhu%0D%0Akonstan+8500C+dengan+penambahan+sumber+karbon+dari+arang+cangkang+kelapa+sawit%0D%0Asebanyak+85%25+dan+dicampur+serbuk+cangkang+telur+sebagai+katalisator+sebanyak+15%25+agar%0D%0Aberdifusi+kedalam+baja.+Metodologi+yang+digunakan+yaitu+dengan+memvariasikan+waktu+60%2C%0D%0A90+dan+120+menit+dengan+pendinginan+quenching+dan+normalizing.+Hasil+penelitian+ini%0D%0Adidapatkan+data+peningkatan+nilai+kekerasan+dari+hasil+proses+pack+carburizing%2C+dimana%0D%0Aproses+quenching+memiliki+nilai+828%2C8+HV+atau+meningkat+sebesar+297%2C34%25+pada+waktu+120%0D%0Amenit+sedangkan+proses+normalizing+memilki+nilai+300%2C8+HV+atau+meningkat+sebesar+44%2C51%25%0D%0Apada+waktu+120+menit.%0D%0AKata+Kunci%3A+baja+ST-41%2C+carburizing%2C+cangkang+kelapa+sawit%2C+waktu+holding%2C+kekerasan%0D%0AThe+use+of+low+carbon+steel+in+daily+life+is+very+much%2C+both+in+the+field+of+development+and+in%0D%0Athe+engineering+field.+There+are+many+things+that+make+this+material+widely+used+by+many%0D%0Apeople%2C+among+others+because+of+the+large+amount+of+this+material.+Good+mechanical%0D%0Aproperties%2C+and+easy+to+process+can+be+by+casting+method+or+by+machining+methods+so+that+it%0D%0Acan+be+formed+according+to+its+usefulness+and+relatively+cheap+prices.+Hardness+is+the%0D%0Amechanical+properties+of+steel+related+to+wear+resistance%2C+the+engine+components+that%0D%0Aexperience+friction+in+their+working+functions+continuously+such+as+pistons%2C+gears%2C+and+shafts%0D%0Aso+that+the+surface+will+experience+wear+and+tear+which+will+have+an+impact+on+the+damage+of%0D%0Athese+components.+Because+this+research+was+conducted+to+determine+the+effect+of+oil+palm%0D%0Ashell+charcoal+on+ST-41+steel+hardness.+Carburizing+is+a+metal+surface+hardening+process%0D%0Ausing+a+constant+temperature+of+8500C+with+the+addition+of+carbon+sources+from+85%25+of+oil%0D%0Apalm+shell+charcoal+and+mixed+eggshell+powder+as+a+catalyst+for+15%25+to+diffuse+into+steel.+The%0D%0Amethodology+used+is+by+varying+the+time+of+60%2C+90+and+120+minutes+by+cooling+quenching%0D%0Aand+normalizing.+The+results+of+this+study+obtained+an+increase+in+the+value+of+hardness+from%0D%0Athe+results+of+the+pack+carburizing+process%2C+where+the+quenching+process+has+a+value+of+828.8%0D%0AHV+or+increased+by+297.34%25+at+120+minutes+while+the+normalizing+process+has+a+value+of%0D%0A300.8+HV+or+increases+by+44.51%25+at+120+minutes.%0D%0AKeywords%3A+ST-41+steel%2C+carburizing%2C+oil+palm+shell%2C+holding+time%2C+hardness&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%2F57231%2F1%2FABSTRAK.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F57231%2F2%2FSKRIPSI%2520FULL.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F57231%2F3%2FSKRIPSI%2520TANPA%2520BAB%2520PEMBAHASAN.pdf&rft.identifier=++IKHWAN+ZUMARAKHMAN%2C+1115021042++(2019)+PENGARUH+WAKTU+HOLDING+PADA+PROSES+PACK+CARBURIZING+ARANG+CANGKANG+KELAPA+SAWIT+TERHADAP+KEKERASAN+BAJA+KARBON+RENDAH+ST-41.++FAKULTAS+TEKNIK%2C+UNIVERSITAS+LAMPUNG.+++++&rft.relation=http%3A%2F%2Fdigilib.unila.ac.id%2F57231%2F