FASA MARTENSIT, FERIT PROEUTEKTOID, PERLIT HALUS PADA MEDIUM CARBON STEEL 0,45%C HASIL PROSES HARDENING DAN NORMALIZING

Authors

  • Djoko Andrijono Universitas Merdeka Malang
  • Ike Widyastuti Universitas Merdeka Malang

DOI:

https://doi.org/10.26905/jtmt.v11i1.4537

Keywords:

Baja Karbon Menengah, Perlakuan Panas, Kekerasan

Abstract

Baja karbon menengah 0,4% C untuk pembuatan komponen otomotif dengan proses pemesinan diperlukan sifat keuletan dan kekerasan. Salah satu cara untuk memperbaiki kedua sifat tersebut, dapat dilakukan dengan proses perlakuan panas jenis proses hardening dan normalizing. Tujuan penelitian untuk mengetahui, membandingkan, menganalisa baja karbon menengah 0,45% C setelah proses hardening 8300C pendinginan air, oli SAE 90 dan normalizing 7800C pendinginan udara dengan waktu tahan 15 menit, 30 menit, 45 menit yang sama serta untuk mengetahui, menganalisa komposisi kimia baja karbon menengah 0,45% C. Manfaat penelitian untuk mengetahui, menganalisa peningkatan sifat keuletan, kekerasan baja karbon menengah 0,45% C setelah proses hardening 8300C dan normalizing 7800C serta memberikan kontribusi bagi usaha kecil menengah, khususnya di bidang pemesinan pembuatan komponen otomotif. Kesimpulan proses hardening 8300C terbentuk fasa martensit, angka kekerasan lebih tinggi dibanding proses normalizing 7800C terbentuk fasa ferit proeutektoid dan perlit halus angka kekerasan semakin menurun, sehingga sifat keuletannya semakin meningkat.

Author Biographies

Djoko Andrijono, Universitas Merdeka Malang

Jurusan Teknik Mesin

Ike Widyastuti, Universitas Merdeka Malang

Jurusan Teknik Mesin

References

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Avner SH, 1987, Introduction to Physical Metallurgy, Singapore : Graw Hill International.

Chadwick, G.A., 1972, Metallography of Phase Transformation, London: Butterworth.

Dieter, G,E., 1981, Mechanical Metallurgy. Second Edition, Tokyo : McGraw-Hill International Book Company.

Doyle, L.E., 1985, Manufaturing Processes and Materials for Engineers, 3rd Edition, New Jersey : Prentice Hall.

Lawrence H., 1983, Manufaturing Processes and Materials for Engineers. Penerbit Erlangga: Jakarta.

Smith WF., 1990, Principles of Materials Science and Engineering, Second Edition, McGraw-Hill International Editions : New York

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Published

2015-02-15

Issue

Vol. 11 No. 1 (2015): Edisi Pebruari 2015

Section

Article

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