Replacement of Ni by Mn in Commercial High-Ni Austenitic Cast Steels Used for High-Performance Turbocharger Housings

High-Ni austenitic cast steels were fabricated by replacing the expensive Ni content by inexpensive Mn in a commercial DIN 1.4849 steel (0.4C-2.0Mn-1.5Si-20Cr-38Ni-1.5Nb (wt pct)), and their high-temperature tensile properties were enhanced by controlling the volume fraction and distribution of carb...

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Veröffentlicht in:	Metallurgical and materials transactions. A, Physical metallurgy and materials science Physical metallurgy and materials science, 2019-06, Vol.50 (6), p.2585-2593
Hauptverfasser:	Yoo, Jisung, Choi, Won-Mi, Lee, Byeong-Joo, Kim, Gi-Yong, Kim, Hyungjun, Choi, Won-Doo, Oh, Yong-Jun, Lee, Sunghak
Format:	Artikel
Sprache:	eng
Schlagworte:	Austenitic stainless steels Carbides Characterization and Evaluation of Materials Chemistry and Materials Science Communication High temperature Housings Manganese Materials Science Metallic Materials Nanotechnology Nickel Steel Structural Materials Superchargers Surfaces and Interfaces Tensile properties Thin Films
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Zusammenfassung:	High-Ni austenitic cast steels were fabricated by replacing the expensive Ni content by inexpensive Mn in a commercial DIN 1.4849 steel (0.4C-2.0Mn-1.5Si-20Cr-38Ni-1.5Nb (wt pct)), and their high-temperature tensile properties were enhanced by controlling the volume fraction and distribution of carbides. The 14-pct-Ni-containing steel showed the highest total fraction and most homogeneous distribution of carbides due to the smallest cell size, which played a role in improving high-temperature properties far better than those of the DIN 1.4849 steel.
ISSN:	1073-5623 1543-1940
DOI:	10.1007/s11661-019-05205-0