| 摘要 |
A heat resisting alloy of Fe-Cr-Ni type for exhaust valves, knit meshes for the catalyzer and the like which is low in price and excellent in high temperature properties, which consists essentially by weight percentage of C:0.01 DIFFERENCE 0.10%, S:</=2.0%, Mn </=2.0%, Cr:14 DIFFERENCE 18%, Nb+Ta:0.5 DIFFERENCE 1.5%, Ti:2.0 DIFFERENCE 3.0%, Al:0.8 DIFFERENCE 1.5%, Ni:30 DIFFERENCE 35%,B:0.001 DIFFERENCE 0.01%, Ca+Mg:0.001 DIFFERENCE 0.01%,Cu</=0.5%, P</=0.02%, S</=0.01%, O</=0.01%, N</=0.01%, and the balance of Fe, additionally the total atomic percentage of Al, Ti, Nb and Ta:5.0 DIFFERENCE 7.0%, and atomic percentage ratio of Ti/Al:1.0 DIFFERENCE 1.5, and M-value calculated from the following equation </=0.95; M=[0.717 Ni(at. %)+0.858 Fe(at. %)+1.142 Cr(at. %)+1.90 Al(at. %)+2.271 Ti(at. %)+2.117 Nb(at. %)+2.224 Ta(at. %)+1.001 Mn(at. %)+1.90 Si(at. %)]/100.
|
