Heat-resistant cast steel having high resistance to surface spal

Details Heat-resistant cast steel having high resistance to surface spal Heat-resistant cast steel having high resistance to surface spal

1999-02-10

2000-03-07

Yee, Deborah

Alloys or metallic compositions

Ferrous

Nine percent or more chromium containing

420 55, 4205841, C22C 3848, C22C 3858, C22C 3000

Patent

active

060336269

ABSTRACT:
A heat-resistant cast steel excellent in resistance to surface spalling and in high-temperature strength, and useful, for example, as a material for forming the trunk portions of coiler drums for use in reversing hot rolling mills. The steel consists essentially of, in % by weight, 0.1 to 0.6% of C, over 0% to not more than 2% of Si, over 0% to not more than 4% of Mn, 24.5 to 32% of Cr, 13 to 25% of Ni, 0.5 to 2% of Nb and 0.1 to 0.25% of N, the balance being substantially Fe. When desired, the steel further comprises, in % by weight, at least one element selected from the group consisting of 0.02 to 0.2% of Al, 0.01 to 0.2% of Ti and 0.01 to 0.2% of Zr.

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