Martensitic steel having a z-phase, powder and component

Abstract

A steel having the following composition: carbon: 0.08%-0.12%, preferably 0.10%; silicon: 0.04%-0.08%; manganese: 0.08%-0.012%; chromium: 9%-II%; molybdenum: 0.4%-1.0%; tungsten: 1.6%-2.4%; cobalt: 2.5%-3.5%; nickel: 0.10%-0.24%; boron: 0.006%-0.01%; nitrogen: 0.002%-0.01%; titanium: 0.008%-0.03%; vanadium: 0.015%-0.029%; niobium: 0.03%-0.07%; optionally copper: 1.00%-2.5%; aluminum: 0.04%-0.10%; the remainder being iron, wherein said steel has improved properties, since no further Z-phase formation occurs.

1 . An alloy comprising at least (in % by weight):
 carbon (C): 0.08%-0.12%,   silicon (Si): 0.04%-0.08%,   manganese (Mn): 0.08%-0.12%,   chromium (Cr): 9%-11%,   molybdenum (Mo): 0.4%-1.0%,   tungsten (W): 1.6%-2.4%,   cobalt (Co): 2.5%-3.5%,   nickel (Ni): 0.10%-0.25%,   boron (B): 0.006%-0.01%,   nitrogen (N): 0.002%-0.01%,   titanium (Ti): 0.008%-0.03%,   vanadium (V): 0.15%-0.25%,   niobium (Nb): 0.03%-0.07%,   optionally   copper (Cu): 1.25%-2.25%,   aluminum (Al): 0.04%-0.10%, and   balance iron (Fe),   
     
     
         2 . A powder comprising an alloy as claimed in  claim 1 . 
     
     
         3 . A component or blank comprising at least an alloy as claimed in  claim 1 . 
     
     
         4 . The alloy, powder or component as claimed in  claim 1  containing copper. 
     
     
         5 . The alloy, powder or component as claimed in  claim 1  which does not contain any copper. 
     
     
         6 . The alloy, powder or component as claimed in  claim 1  containing
 001%-0.004% of nitrogen, 
 
     
     
         7 . The alloy, powder or component as claimed in  claim 1  containing
 006%-0.010% of nitrogen. 
 
     
     
         8 . The alloy, powder or component as claimed in  claim 1  containing
 008%-0.012% of titanium. 
 
     
     
         9 . The alloy, powder or component as claimed in  claim 1  containing
 015%-0.03% of titanium. 
 
     
     
         10 . The alloy, powder or component as claimed in  claim 1  containing aluminum. 
     
     
         11 . The alloy, powder or component as claimed in  claim 1  which does not contain any aluminum.