Toyota Jidosha Kabushiki Kaisha

Kabushiki Kaisha Toyota Chuo Kenkyusho

Hideaki Ikehata

Kazuaki Nishino

Hirofumi Ito

Takamichi Ueda

Harumi Ueno

Takashi Maeshima

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&#x2014;S&#x2267;1.0; andC&#x2212;(1/12Cr&#x2212;32Zr)&#x3e;0,

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Nagakute, Japan

Hideaki Ikehata