Comparison of Koma Material for Import and Local Product
P H Tjahjanti1,*, A D Wicaksono1, A. Akbar1, A N F Ganda2

1 Department of Mechanical Engineering, Universitas Muhammadiyah Sidoarjo,
Kampus 2 Jalan Raya Gelam nomer 250 Candi Sidoarjo, Jawa Timur, Indonesia
2 Department of Mechanical Engineering, State University of Surabaya, Indonesia


*E-mail: prantasi[at]gmail.com prantasiharmi[at]umsida.ac.id

Abstract

Koma material is one part of a wire cutting machine that is in PT. X in Indonesia, which functions as a wire straightening device that will be processed or cut. This material is made from cast iron and is obtained from imports. Never tried to make local product. The aim of the research was to make Koma material from cast iron. The method used is to make Koma material such as imported products and then do hardness testing and observe the microstructure using optical microscope. The results are compared with Koma imported products. The results show that the coma material of imported products has a higher hardness than local products, because there are differences in chemical elements in the cast iron.

Keywords: Koma material, import product, local product, hardness, microstructure

Topic: Material Engineering

Link: https://ifory.id/abstract-plain/gyEc8TetF73R

Web Format | Corresponding Author (Prantasi Harmi Tjahjanti)