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US 4,780,139 AGranted
Tool steel
AssigneeKloster Speedsteel AB
InventorsPer I. Hellman, Henry L. Wisell
Life of this patent
Estimating the term…
Abstract
A vanadium-containing power tool steel is disclosed. The steel is compacted to full density at high temperature and presence and contains M.sub.6 C or M.sub.7 C.sub.3 carbides. The carbides have an effective maximal size of 4 to 15 microns.
Claims11
Vanadium-containing tool steel made from metal powder by compaction to full density at high pressure and high temperature, characterized in that the steel contains a hard phase, which essentially consists of M.sub.6 C-carbides, M.sub.7 C.sub.3 -carbides, or a mixture thereof and that the effective maximal size of the carbides is between 3 and 15 microns.
Dependencies are inferred from the claim text.