ENGINE VALVE MADE OF TITANIUM ALLOY

Title:

ENGINE VALVE MADE OF TITANIUM ALLOY

Document Type and Number:

Japanese Patent JPH0196407

Kind Code:

A

Abstract:

PURPOSE:To improve abrasion resistance of seat face and to improve burning and biting resistance of the surface of shaft section by providing Ni alloy nonelectrolytic galvanization layer onto the surface of a titanium alloy valve. CONSTITUTION:Ni alloy nonelectrolytic galvanization layer 2 having thickness of 10-100mum and Vicker's hardness higher than 600 is provided onto the surface of a titanium alloy valve body 1. Since Ni alloy nonelectrolytic galvanization layer 2 has good thermal conductivity and sufficiently high hardness even under high temperature, abrasion resistance of the seat face 3 and burning and biting resistance of the surface of the shaft section 4 can be improved.

Inventors:

SUGIMOTO YOSHIHITO
SHIDA YOSHIAKI
KITAYAMA SHIRO
TOYAMA KAZUO
YANAI AKIHIRO

Application Number:

JP25068187A

Publication Date:

April 14, 1989

Filing Date:

October 06, 1987

Export Citation:

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Assignee:

SUMITOMO METAL IND

International Classes:

C23C18/34; F01L3/02; F01L3/04; (IPC1-7): C23C18/34; F01L3/02

Attorney, Agent or Firm:

Takeshi Imai

Next Patent: JPH0196408