Analisis Perbandingan Kekerasan dan Keausan Material Pin Tooth Bucket Genuine dengan Non Genuine pada Unit Excavator Kapasitas 20 Ton

NAUFAL HISYAM FARROS, Nugroho Santoso. S.T., M. Eng.

2024 | Tugas Akhir | D4 TEKNIK PENGELOLAAN DAN PERAWATAN ALAT BERAT

Excavator memiliki satu komponen yang berperan penting dalam fungsinya adalah pin tooth bucket. Kasus keausan pin tooth bucket ditemukan di CV Cahaya Indra Laksana, mengakibatkan tooth bucket tidak settle pada posisinya dan pin tooth bucket harus diganti. Perawatan performa excavator dilakukan dengan penggantian komponen. Penggunaan spare part genuine dinilai lebih baik dalam kualitas material dan memiliki masa pakai yang lebih lama. CV Indra Laksana lebih memilih produk non genuine untuk penggantian spare part. Tujuan penelitian ini adalah menganalisis nilai kekerasan dan nilai laju keausan pada spesimen uji pin tooth bucket genuine dan non genuine pada unit excavator kapasitas 20 ton. Pengujian yang dilakukan meliputi pengujian komposisi kimia, pengujian analisa struktur mikro, pengujian kekerasan vickers dan pengujian keausan Ogoshi. Hasil penelitian menunjukkan bahwa komposisi kimia pada pin tooth bucket genuine (C 0,446%), dan non genuine (C 0,504%) termasuk dalam kategori baja karbon sedang. Kekerasan pin tooth bucket genuine (415 HVN) lebih tinggi dibandingkan non genuine memiliki nilai (394 HVN), karena material pin tooth bucket genuine memiliki struktur mikro lower bainite dibandingkan non genuine memiliki struktur mikro upper bainite. Pin tooth bucket genuine memiliki laju keausan yang lebih rendah (2,02 x <!--[if gte msEquation 12]>10-5mm3/kg.m<![endif]--><!--[if !msEquation]--> <!--[endif]-->) dibandingkan non genuine memiliki nilai rata-rata laju keausan yang tinggi yaitu (2,69 x <!--[if gte msEquation 12]>10-5mm3/kg.m<![endif]--><!--[if !msEquation]--> <!--[endif]-->), sehingga pin tooth bucket genuine lebih tahan aus dibandingkan pin tooth bucket non genuine.

Excavators have one component that plays an important role in its function, which is the tooth bucket pin. A case of tooth bucket pin wear was found at CV Cahaya Indra Laksana, resulting in the tooth bucket not settling into position and the tooth bucket pin had to be replaced. Maintenance of excavator performance is done by replacing components. The use of genuine spare parts is considered better in material quality and has a longer service life. CV Indra Laksana prefers non-genuine products for spare part replacement. The purpose of this research is to analyze the hardness value and wear rate value of genuine and non-genuine pin tooth bucket test specimens on an excavator unit with a capacity of 20 tons. The tests carried out include chemical composition testing, microstructure analysis testing, Vickers hardness testing and Ogoshi wear testing. The results showed that the chemical composition of genuine tooth bucket pins (C 0.446%), and non-genuine (C 0.504%) is included in the medium carbon steel category. The hardness of the genuine pin tooth bucket (415 HVN) is higher than the non genuine has a value of (394 HVN), because the genuine pin tooth bucket material has a lower bainite microstructure compared to non genuine has an upper bainite microstructure. Genuine pin tooth bucket has a lower wear rate (2,02 x <!--[if gte msEquation 12]>10-5mm3/kg.m<![endif]--><!--[if !msEquation]--> <!--[endif]-->) than non genuine has a high average wear rate value of (2,69 x <!--[if gte msEquation 12]>10-5mm3/kg.m<![endif]--><!--[if !msEquation]--> <!--[endif]-->), so genuine pin tooth bucket is more wear resistant than non genuine pin tooth bucket.

Kata Kunci : pin tooth bucket, kekerasan, dan laju keausan