Composite steel material and composite steel tool made from this material
AssigneeUddeholms Aktiebolag
InventorsOlof K. Franzen, Ulf Hallstrom, Bengt A. Petersson
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Abstract
A composite steel material consisting of two metallically joined steel components having different chemical compositions is disclosed. The first component is a high-speed tool steel or other high alloy tool steel having a carbon activity and a hardness and wear resistance in the same order as that of high speed tool steel. The second component is a steel consisting essentially of 0.40-0.45 weight percent carbon, 0.40-1.00 weight percent silicon, 0.40-1.00 weight percent manganese, 2.5-4.0 weight percent chromium, 0.50-1.50 weight percent molybdenum, 0.20-0.45 weight percent vanadium, balance iron and normal impurities.
Claims3
Composite steel material consisting of two metallically joined steel components having different chemical compositions, characterized in that a first component is a high speed tool steel or other high alloy tool steel having a carbon activity and a hardness and wear resistance in the same order as that of high speed tool steel, and that a second component is a steel essentially consisting of
- 0.40-0.45 weight-% carbon
- 0.40-1.00 weight-% silicon
- 0.40-1.00 weight-% manganese
- 2.5-4.0 weight-%chromium
- 0.50-1.50 weight-% molybdenum
- 0.20-0.45 weight-% vanadium
- balance iron and normal impurities
Dependencies are inferred from the claim text.