Alloy article, method for manufacturing same, and product using same

An alloy article, having a chemical composition comprising:

• 30 atomic percent to 33 atomic percent of Co,
• 20 atomic percent to 23 atomic percent of Cr,
• 20 atomic percent to 23 atomic percent of Fe,
• 17 atomic percent or more and less than 23 atomic percent of Ni,
• 5 atomic percent or more and less than 7 atomic percent of Ti,
• 1 atomic percent to 3 atomic percent of Mo, and
• remainder substances of unavoidable impurities,
• wherein ultrafine particles with an average diameter of 40 nm or less are dispersedly precipitated in matrix phase crystals of the alloy article.

An alloy article having a chemical composition comprising:

• 28.9 atomic percent to 35 atomic percent of Co;
• 10 atomic percent to 25 atomic percent of Cr;
• 10 atomic percent to 25 atomic percent of Fe;
• 15 atomic percent to 30 atomic percent of Ni;
• 5 atomic percent to 15 atomic percent of Ti;
• 1.9 atomic percent to 8 atomic percent of Mo;
• and
• remainder substances of unavoidable impurities, wherein ultrafine particles with an average diameter of 40 nm or less are dispersedly precipitated in matrix phase crystals of the alloy article.