FERRITIC HEAT RESISTANT CAST STEEL AND ITS MANUFACTURE

Title:

FERRITIC HEAT RESISTANT CAST STEEL AND ITS MANUFACTURE

Document Type and Number:

Japanese Patent JPH05320830

Kind Code:

A

Abstract:

PURPOSE: To improve the heat resistance of ferritic heat resistant cast steel without sacrificing its oxidation resistance, machinability and structural stability and to increase its applicability to an automotive engine exhaust system.

CONSTITUTION: The objective steel is constituted of, by weight, 0.05 to 0.5% C, 1.0 to 2.0% Si, <0.6% Mn, <0.04% P, <0.04% S, <0.5% Ni, 10 to 20% Cr, 0.1 to 1.0% V, 0.5 to 1.0% Nb, 0.10 to 0.50% Mo and <0.01% W, and, if required, 0.01 to 0.50% Al is furthermore added thereto. After being cast, it is subjected to annealing treatment by holding at 850 to 1000°C for 1 to 5hr and successively gradually cooling to ≤700°C.

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Inventors:

GENMA KIWA
SUZUKI MASAMI
KATO SHINJI

Application Number:

JP15451492A

Publication Date:

December 07, 1993

Filing Date:

May 21, 1992

Export Citation:

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Assignee:

TOYOTA MOTOR CORP

International Classes:

C21D6/00; C22C38/00; C22C38/48; (IPC1-7): C22C38/00; C21D6/00; C22C38/48

Attorney, Agent or Firm:

Nobuo Kaida (2 outside)

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