Title:
HEAT INSULATING ALLOY STEEL
Document Type and Number:
Japanese Patent JPH09263897
Kind Code:
A
Abstract:
To obtain a thermal expansion coefficient approximately same as that of a general tool steel, good matrix hardness and furthermore nitriding depth equal to that of an austenitic stainless steel in a heat insulating alloy steel having low thermal conductivity.
This heat insulating alloy steel is the one having a compsn. contg., by weight, 0.1 to 0.5% C, 3.0 to 7.0% Si, 5.0 to 18% Ni and 0.5 to 8.0% Cr, furthermore contg., at need, at least one kind selected from ≤2.0% Mn, ≤2.0% Al and ≤2.0% Mo, and the balance substantial Fe. In the matrix metallic structure of the heat insulating alloy steel, by area, ≥30% is composed of martensitic phases.
Inventors:
NISHIMURA TAKANOBU
KIHATA MASANORI
IWAI MASAHIKO
YADA MASAHITO
KIHATA MASANORI
IWAI MASAHIKO
YADA MASAHITO
Application Number:
JP7388396A
Publication Date:
October 07, 1997
Filing Date:
March 28, 1996
Export Citation:
Assignee:
TOSHIBA CORP
International Classes:
C22C38/00; C22C38/40; C22C38/58; (IPC1-7): C22C38/00; C22C38/40; C22C38/58
Attorney, Agent or Firm:
Suyama Saichi