Perbandingan Kekerasan Dan Struktur Mikro Pegas Daun Yang Mengalami Proses Heat Treatment

Abstract

Leaf spring is a component that functions to receive dynamic load and provide comfort in driving. Leaf springs are commonly used small public service vehicles and small commercial vehicles are deteriorated mechanical properties prior to the age limit of leaf springs. To restore the mechanical properties of the spring there will be a heat treatment that includes heat treatment of cooling (quenching) .From Hardness Vickers hardness test results on steel leaf springs are associated with an increase of hardness, on the condition of normal leaf spring steel without heat treatment hardness obtained average price of 325 , on the condition of the leaf spring steel with heat treatment at a temperature of 800 0 C with cooling oil obtained average price of 380, on the condition of the leaf spring steel with heat treatment at a temperature of 800 0 C with air cooling average price obtained -average of 339, from the test results of metallographic condition microstructure on the leaf spring normally with no warm-up run into the matrix pearlitic and at the side there sulfide / impurities formed by sulfur, the results of tests metallographic condition of microstructure on the leaf spring that is experiencing warming with quenching oil in the form of a matrix martensitic and at the edges of experience decarburization , austenitic microstructure form, the results of tests metallographic condition of microstructure on the leaf spring is warming by cooling the air in the form of a matrix perlitic middle and at the edges of experience decarburization micro-structure in the form of ferrite-pearlite.

Pengelasan SMAW dengan variasi g Perbandandingan Gerakan Elektroda Terhadap Uji Mikrostruktur, Uji Bending & Uji Impak Pada Pegas Daun Mitsubishi Canter 125 PS

“…Cara kerja pegas daun bila roda belakang menerima kejutan dari permukaan jalan maka akan diteruskan ke rumah poros belakang yang mengakibatkan pegas daun melakukan pemanjangan atau pegas berubah bentuk dari elips mendekati lurus (pemegasan pegas daun) yang konstruksinya dilengkapi dengan ayunan pegas [11] Material pegas yang digunakan dalam penelitian ini adalah Baja pegas SUP9A. Komposisi kimia baja SUP9A dapat dilihat pada tabel 1.…”

Pengaruh Variasi Kampuh Pengelasan Smaw Terhadap Uji Kekerasan, Uji Bending dan Uji Struktur Mikro Pada Pegas Daun Mitsubhisi Canter 125 PS

“…141 dan 3 spesimen dengan kampuh double U, akan tetapi dalam penelitian ini hanya nilai rata-rata pengujian struktur mikro yang dijadikan sebagai analisa penelitian [16].…”

Pengaruh Media Pendingin terhadap Kekerasan dan Struktur Mikro Hasil Pengelasan SMAW Pegas Daun Mitsubishi PS 120

“…Berdasarkan penelitian Saputra & Tyastomo (2016), dalam pengujian perbandingan kekerasan dan struktur mikro pegas daun yang mengalami proses heat treatment. Pegas daun dipanaskan pada suhu 800 °C, kemudian didinginkan secara cepat dengan menggunakan media air, oli dll.…”