| 摘要 |
1. A hard, recharging alloy, the C and Co contents of which are within a convex, polygonal area delimited by the following coordinates (%, by weight) : C Co ----- ----- 1.3 30 1.8 30 2.0 0 2.8 0 2.8 10 characterised in that on the one hand the carbon content thereof is from 1.5 to 1.8% and the cobalt content thereof is from 20 to 26%, the simultaneous variations of C and Co nevertheless being restricted to within the above-mentioned convex, polygonal area, and on the other hand the composition thereof of elements other than C and Co is : Si from 0.5 to 15 ; Cr from 25 to 30 ; W from 10 to 15 ; Fe =< 3 ; Total others =< 1.0 ; Ni Remainder. |
