P.H. Tjahjanti, A.D. Wicaksono, A. Akbar, A.N.F. Ganda
Koma material is one of the wire cutting machine part from PT. X in Indonesia, which has a function as a wire straightening device that will be processed or cut. This material is made from white cast iron and is obtained from imports. Never tried to make the local product. The aim of the research is making Koma material from white cast iron. The method is used to make Koma material which has a quality similar to imported products. The prepared material later will be tested using hardness testing and optical microscope measurement for observing its microstructure. The results are compared with Koma imported products show that Koma material of imported products has a higher hardness than local products, due to the differences content in chemical elements in the white cast iron. © Published under licence by IOP Publishing Ltd.
Department of Mechanical Engineering, Universitas Muhammadiyah Sidoarjo, Kampus, 2 Jalan Raya Gelam No 250, Candi Sidoarjo, Jawa Timur, Indonesia; Department of Mechanical Engineering, State University of Surabaya, Indonesia
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