<![CDATA[Surface hardening pada bahan Stainless Steel 304 dengan alat RF-plasma nitrocarburizing. Surface hardening pada bahan Stainless Steel 304 dengan alat RF-plasma nitrocarburizing telah dikerjakan. Beberapa samples telah di-nitrocarburizing pada temperatur 4000C selama (0,5-6) jam. Hasilnya menunjukkan bahwa, pada sample awal kekerasan bahan SUS 304 adalah 260,58 Kgf/mm2, setelah di-nitrocarburizing pada temperatur 400 0C selama 6 jam, kekerasannya menjadi 347,62 Kgf/mm2, sedangkan kedalaman maximum atom-atom nitrogen dan carbon yang terdifusi kedalam bahan SUS 304 ialah 109,1 micrometer. Pengamatan strukturmikro menunjukkan bahwa pada sample yang telah di nitrocarburizing pada temperatur 400 0C selama 6 jam terlihat jelas adanya lapisan atom-atom N dan C di dalam bahan SUS 304. Samples awal dan yang dinitrocarburizing pada 400 0C (t = 6 jam) terdapat matrix yang sama yaitu γ-phase, δ-ferrite, dan twinning transformation. Kata kunci : Nitrocarburizing, RF- plasma, SUS 304, kekerasan, struktur mikro Surface hardening on stainless steel 304 material with RF-plasma nitrocarburizing. Surface hardening on stainless steel 304 material with RF-plasma nitrocarburizing made in BATAN have been carried out. Some samples was nitrocarburized at temperature 400 0C for (0,5-6) hour. The results show that the hardness of untreated sample of SUS 304 material was 260,58 Kgf/mm2, after the sample nitrocarburized at temperature 400 0C for 6 hour, the hardness increased up to 347,62 Kgf/mm2. Furthermore, the maximum depth of carbon and nitrogen atoms that diffused in SUS 304 was 109,1 micrometer. Microstructure observation shows that the sample after nitrocarburized at temperature 400 0C for 6 hour to be seen very clear that there are layer of N and C atoms in SUS304 material. Un-treated sample and sample that nitrocarburized at temperatur 400 0C (t = 6 jam) have same matrixes namely, γ-phase, δ-ferrite, and twinning transformation. Key words : Nitrocarburizing, RF- plasma, SUS304, hardness, microstructure]]>
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