Back to results
US 6,354,001 B1Granted
Method of manufacturing a Ti alloy poppet value
AssigneeFuji Oozx Inc.
InventorHiroaki Asanuma
Life of this patent
Estimating the term…
Abstract
A bar material is made of an (α+β) or a near α Ti alloy which comprises a regular α structure, and the end thereof is heated at a temperature above its β transformation point by an electric forging device to form an enlarged portion. The enlarged portion is immediately formed by hot forging to make a valve head of a poppet valve which is employed in an internal combustion engine. The valve head comprises an acicular α structure which provides higher fatigue and tensile strengths.
Claims8
A method of manufacturing a Ti alloy poppet valve, comprising the steps of:
- heating an end of a bar material made of an (α+β) or a near α alloy which comprises a regular α structure at a temperature above its β transformation point to make an enlarged portion;
- and
- forming said enlarged portion by hot forging into a valve head having an acicular α structure.
Dependencies are inferred from the claim text.