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Title: Process for casting hard-faced, lightweight camshafts and other cylindrical products

A process for casting a hard-faced cylindrical product such as an automobile camshaft includes the steps of: (a) preparing a composition formed from a molten base metal and an additive in particle form and having a hardness value greater than the hardness value of the base metal; (b) introducing the composition into a flask containing a meltable pattern of a cylindrical product such as an automobile camshaft to be manufactured and encased in sand to allow the composition to melt the pattern and assume the shape of the pattern within the sand; and (c) rotating the flask containing the pattern about the longitudinal axes of both the flask and the pattern as the molten base metal containing the additive in particle form is introduced into the flask to cause particles of the additive entrained in the molten base metal to migrate by centrifugal action to the radial extremities of the pattern and thereby provide a cylindrical product having a hardness value greater at it's radial extremities than at its center when the molten base metal solidifies.
Inventors:
 [1];  [2];  [2];  [1]
  1. (Corvallis, OR)
  2. (Albany, OR)
Issue Date:
OSTI Identifier:
870616
Assignee:
United States of America as represented by Secretary of (Washington, DC) NETL
Patent Number(s):
US 5560420
Research Org:
National Energy Technology Laboratory, Pittsburgh, PA, and Morgantown, WV
Country of Publication:
United States
Language:
English
Subject:
process; casting; hard-faced; lightweight; camshafts; cylindrical; products; product; automobile; camshaft; steps; preparing; composition; formed; molten; base; metal; additive; particle; form; hardness; value; introducing; flask; containing; meltable; pattern; manufactured; encased; sand; allow; melt; assume; shape; rotating; longitudinal; axes; introduced; particles; entrained; migrate; centrifugal; action; radial; extremities; provide; center; solidifies; particle form; base metal; metal containing; longitudinal axes; composition formed; cylindrical product; /164/