Cobalt-based cladding alloy for engine valve and engine

Abstract

A cobalt-based cladding alloy for an engine valve includes, by mass %: Cr: 13% to 35%; Mo: 5% to 30%; Si: 0.1% to 3.0%; C: 0.04% or less; Ni: 15% or less; W: 9% or less; Fe: 30% or less; Mn: 3% or less; S: 0.4% or less; and Co and inevitable impurity elements as a remainder. The amount of Co is 30% or more.

What is claimed is: 
     
         1 . A cobalt-based cladding alloy for an engine valve comprising, by mass %:
 Cr: 13% to 35%;   Mo: 5% to 30%;   Si: 0.1% to 3.0%;   C: 0.04% or less;   Ni: 15% or less;   W: 9% or less;   Fe: 30% or less;   Mn: 3% or less;   S: 0.4% or less; and   Co and inevitable impurity elements as a remainder,   wherein an amount of Co is 30% or more.   
     
     
         2 . An engine comprising:
 an engine valve on which a cladding material made of the cobalt-based cladding alloy according to  claim 1  is deposited,   wherein a fuel for the engine is any one of ethanol, ethanol-blended gasoline, compressed natural gas, and liquefied petroleum gas.