Bimetallic casting serving as a wear piece in vertical crushing mills and its method of manufacture
AssigneeMagotteaux International S.A.
InventorNorbert Guerard
Life of this patent
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Abstract
The invention relates to a bimetallic casting serving as a wear piece in vertical mills and its method of manufacture. It includes a core (13) made of a ductile cast iron and provided with mechanical bonding elements in the form of pins (15) which are rendered integral with an outer casing (17) by casting, the outer casing being made of a non-ductile wear material having a high chromium content. Such castings are used for being mounted on the hub of a roller of a so-called vertical-axis crushing mill.
Claims16
Method for manufacturing a bimetallic casting including a core made of ductile cast iron and including mechanical bonding elements, and an outer casing made of non-ductile wear material, wherein only said mechanical bonding elements are bonded to the outer casing by a mechanical bonding only, said method comprising
- casting said core with mechanical bonding elements in a first mould,
- applying a refractory coating to the core,
- placing the core in a second mould and casting the outer casing onto said core by rendering only said mechanical bonding elements of the core integral with the outer casing, and
- finally performing a tempering heat treatment.
Method for manufacturing a bimetallic casting including a core made of ductile cast iron and including mechanical bonding elements, and an outer casing made of non-ductile wear material, wherein only said mechanical bonding elements are bond to the outer casing by a mechanical bonding only, said method comprising the steps of
- casting the outer casing in a first mould,
- applying a refractory coating to the outer casing,
- placing the outer casing in a second mould and casting said core with mechanical bonding elements onto said outer casing, by rendering only said mechanical bonding elements of the core integral with the outer casing, and
- finally performing a tempering heat treatment.
Dependencies are inferred from the claim text.