Chromium cast iron and method of producing same
AssigneeGeorge Fischer Ltd.
InventorIvo Henych
Life of this patent
Estimating the term…
Abstract
White, chromium cast iron having shock and impact resistance which comprise iron together with: ______________________________________ Carbon: 2.2 to 3.6% by weight Chromium: 12.0 to 30.0% by weight Molybdenum: 0.0 to 3.0% by weight Nickel: 0.0 to 3.0% by weight Manganese: 0.0 to 2.0% by weight Copper: 0.0 to 3.0% by weight Vanadium: 0.0 to 1.5% by weight ______________________________________ are disclosed. The casting are produced by casting the molten alloy in a metallic permanent mold, removing the solidified casting from the mold at a temperature above the A.sub.c3 temperature and cooling the casting sufficiently quickly to prevent the formation of pearlite as well as secondary carbide precipitation.
Claims8
The process for the production of cast parts with high impact resistance and abrasion resistance made of white, at least predominantly austenitic, chromium cast iron which has alloying components of:
- ______________________________________ Carbon:
- 2.2 to 3.6% by weight Chromium:
- 8.0 to 30.0% by weight Molybdenum:
- 0.0 to 3.0% by weight Nickel:
- 0.0 to 6.0% by weight Manganese:
- 0.0 to 2.0% by weight Copper:
- 0.0 to 3.0% by weight Vanadium:
- 0.0 to 1.5% by weight ______________________________________
- the cast part having a structure free of pearlite and secondary carbide precipitations,
- wherein the alloy is cast in a mold and allowed to solidify,
- the resultant casting is removed from the mold at a temperature above the A.sub.c 3 temperature of the alloy;
- and the resultant casting is cooled at a rate sufficiently rapid to prevent the formation of pearlite and secondary carbide precipitations.
Dependencies are inferred from the claim text.