JP2007518879A5 - - Google Patents

Claims (9)

A method for producing an austenitic alloy, wherein a base material made of an austenitic alloy having a low Al content is coated with an alloy having a higher Al content at least one layer at a temperature of 100 to 600 ° C. A method for producing an austenitic alloy, characterized in that the final product is 4.5 to 12 wt % . 2. The method for producing an austenitic alloy according to claim 1, wherein the Al content is a final product having a content of 5.5 to 12 wt%. In claim 1 or 2 , the following chemical composition (wt%):
Ni: 20 to 70%,
Cr: 15-27%,
Al: 0-5%
Mo and / or W: 0 to 4%,
Si: 0 to 2%,
Mn: 0 to 3%,
Nb: 0 to 2%,
Y, Zr and / or Hf: 0 to 0.5%,
Ti: 0 to 0.5%,
One or more rare earth metals (REM): 0 to 0.1%
Remainder: A method comprising coating a base alloy having Fe and inevitable impurities with at least one layer having a higher Al content composition. 4. The method according to claim 1, wherein the at least one layer is Al. 4. The method according to claim 1, wherein the at least one layer is an Al-based alloy. 6. The method according to claim 5, wherein the Al-based alloy is Al containing 0.5 to 25 wt% Si. In any one of claims 1 to 6, the composition above the final product is the following (wt%):
C: 0 to 0.2%,
N: 0 to 0.1%
Ni: 25-70%,
Cr: 15-25%,
Al: 4.5-12%,
Mo and / or W: 0 to 4%,
Si: 0 to 4%,
Mn: 0 to 3%,
Nb: 0 to 2%,
Ti: 0 to 0.5%,
Y, Sc, Zr and / or Hf: 0 to 0.5%,
One or more rare earth metals (REM) such as Ce, La, Sm: 0-0.2%;
The balance: Fe and inevitable impurities. An austenitic alloy having an Al content of 4.5 to 12 wt%, which can be produced by the method according to any one of claims 1 to 7 . 8. The method according to any one of claims 1 to 7 , wherein the method is used for manufacturing a support member for use in high temperature applications such as catalytic converters and resistance heating.