Sughrue Mion, PLLC
Austenite heat-resisting cast steel
Provided is austenite heat-resisting cast steel with reduced precipitation of ferrite phase during the application of thermal load to stabilize the austenite structure for improved heat resistance. The austenite heat-resisting cast steel contains elements of 0.1 to 0.6 mass % of C, 1.0 to 2.5 mass % of Si, 1.0 to 3.5 mass % of Mn, 0.05 to 0.2 mass % of S, 14 to 24 mass % of Cr, 5 to 20 mass % of Ni, 0.1 to 0.3 mass % of N, 0.01 to 1.2 mass % of Zr, 0.01 to 1.5 mass % of Cu, 0.01 to 1.5 mass % of Nb, Fe as a remainder and unavoidable impurity. The elements satisfy the following expressions:Mn—S≧1.0; andC−(1/12Cr−32Zr)>0,
TOYOTA JIDOSHA KABUSHIKI KAISHA KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO
C C C C C C C C C C C C C
C22C C21D C21D C22C C22C C22C C21D C21D C22C C22C C22C C22C C22C
inventional additional additional inventional inventional inventional additional inventional inventional inventional inventional inventional inventional
Hirofumi Takamichi Kazuaki Takashi Harumi Hideaki
Ito Ueda Nishino Maeshima Ueno Ikehata