Pengaruh Annealing terhadap Sifat Keras dan Struktur Mikro Baja Tahan Karat AISI 410-3Mo-3Ni

Abstract

AISI 410-3Mo-3Ni stainless steel is a martensitic steel which limited in using when compared to austenitic and ferritic stainless steels. Martensitic steel has an essential role in specific components due to a combination of strength, toughness and excellent corrosion resistance. However, martensitic steel tends to undergo decreasing in mechanical properties and microstructure after the forging process. In this study, mechanical properties and microstructure of the forged AISI 410 after receiving annealing heat treatment will be studied. Annealing aims to reduce material hardness and increase grain refinement of material. Annealing heat treatment is carried out by varying the annealing temperature and time. Annealing temperature variations are 7000, 7600, and 8000C. The annealing time variation is 3 hours and 6 hours. The effect of annealing time and temperature will be studied on the hardness and microstructure of the AISI 410 modified material. The optimum hardness of 35.9 HRC in sample with annealing treatment in 760°C for 6 hours. The microstructure shows delta ferrite, martensite, austenite, and carbide phases which affect hardness value of annealed samples.

The Effect of Ecap Processing to Hardness, Surface Morphologi, and Corrosion Resistance of 6061 Aluminium Alloys

“…Figure 1 showed the flow diagram of the ECAP (equal channel angular pressing) process and the characterization after the ECAP process. Before the ECAP process, the samples were annealed in an argon gas environment for 4 hours at 530 °C to homogenize the microstructure and remove internal stress [15]. The samples were immersed in liquid nitrogen for 5 minutes before the ECAP process to obtain the cryogenic temperature in the samples.…”

Pengaruh Nitrocarburizing Terhadap Kekerasan Dan Laju Korosi Pada Baja Tahan Karat Aisi 410

“…Kemajuan desain permukaan ini meliputi karburisasi, sputtering, implantasi partikel, nitridasi plasma, dan nitrokarburisasi. Baja keras AISI 410-3Mo-3Ni adalah baja martensit dengan penggunaanya terbatas jikalau dibandingkan dengan baja austenitik dan feritik [3]. Adapun hasil yang didapat dari penelitian ini adalah nilai kekerasan terendah ditunjukkan pada suhu proses austenisasi 1000°C serta suhu tempering 700 °C, yaitu 38,13 HRC.…”

“…Kondisi ini disebabkan bahan sudah mengalami kejenuhan sehingga dengan adanya tambahan waktu perlakuan nitrocarburizing sehingga nilai kekerasan akan menurun. Menurut [3]. Dengan asumsi suhu dinaikkan, laju percepatan partikel nitrogen akan lebih menonjol, sedangkan dispersi dan respon iota nitrogen (N) terhadap substrat (Fe) tidak bisa mengikuti laju peningkatan kekerasan, sehingga akan terjadi pengumpulan N. molekul pada tingkat superfisial, maka kekerasan permukaan tidak bertambah tetapi berkurang dari kondisi idealnya.…”