Patent ID: 9655698
Date: 2017-05-23
CPC Classifications: A61C,A61K,B22F,C22C,C22F,Y10T

Claim:
1. A blank material to be cut for dentistry comprising: Co as a main component; Cr at a ratio equal to or higher than 26 mass % and equal to or less than 35 mass %; Mo at a ratio equal to or higher than 5 mass % and equal to or less than 12 mass %; Si at a ratio equal to or higher than 0.3 mass % and equal to or less than 2.0 mass %; and N at a ratio equal to or higher than 0.09 mass % and equal to or less than 0.5 mass %, wherein the blank material is a sintered body of a metal powder, the blank material includes a surface layer portion and an inner layer portion, the surface layer portion cross-sectionally extends through the blank material at a depth of 0.3 mm relative to an outer major surface of the blank material, the inner layer portion cross-sectionally extends through the blank material at a depth of 5 mm relative to the outer major surface, and a concentration of N at the inner layer portion is equal to or higher than 50% and equal to or less than 200% of a concentration of N at the surface layer portion.