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All Journal Jurnal METTEK (Jurnal Ilmiah Nasional Dalam Bidang Ilmu Teknik Mesin)
Mustika Mustika
Program Studi Magister Teknik Mesin Fakultas Teknik Universitas Udayana
Mechanical Engineering

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Karakteristik kekerasan material dibawah permukaan akibat pemanasan-awal substrate dalam proses thermal coating Mustika Mustika; I Made Widiyarta; I Made Parwata; I Putu Lokantara
Jurnal Mettek: Jurnal Ilmiah Nasional dalam Bidang Ilmu Teknik Mesin Vol 3 No 1 (2017)
Publisher : Program Studi Magister Teknik Mesin Universitas Udayana

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Abstract

Dalam proses flame spray coating, pemanasan awal terhadap material inti sangat diperlukan untuk mengurangi tegangan sisa dan menyatunya material pelapis pada permukaan substrate material menjadi lebih baik. Suhu pemanasan awal tersebut tentunya akan mempengaruhi sifat kekerasan substrate material hingga kedalaman tertentu.Pada penelitian ini, pelapisan panas (flame powder spray coating) dilakukan pada baja karbon sedang dengan material pelapis NiW. Pemanasan awal dilakukan pada permukaan substrate material dengansuhu yang bervariasi (300ºC, 400ºC dan 500ºC). Dari penelitian yang telah dilakukan dapat diketahui bahwa tidak ada pengaruh antara variasi preheating dengan kekerasan material pelapis Ni-W hasil dari powder flame spray coating. Semakin ke dalam kekerasannya semakin berkurang hingga mencapai kekerasan material inti yang seragam. Material substrate mengalami sedikit pengerasan hingga jarak 0.5 mm dari boundary. In the process of the flame spray coating, pre-heating of the substrate is required in order to reduce residual stress and to improve the adhesion of the coating material on the substrate. The pre-heatingtemperature also has an effect on the hardness of substrate material into a certain depth. In this study, flame powder spray coating was performed on the medium carbon steel with the coating material NiW. Pre-heating on the substrate material was varied of about 300ºC, 400ºC and 500ºC. From the experiments, the variation of pre-heating was not affect the hardness of coating material NiW. The increase of depth form the surface, the hardness of the material decrease until the hardness of the material is uniform. The hardness of the substrate material was change into depth of about 0.5 mm from boundary layer.
Co-Authors I Made Parwata I Made Widiyarta Putu Lokantara