TiC0.5N0.5-Mo2C-Ni焼結合金の強度と組織的欠陥について
1984 年 48 巻 10 号 p. 1011-1016
詳細
1984 年 48 巻 10 号 p. 1011-1016
The transverse-rupture strength of a TiC0.5N0.5-19 mass%Mo2C-23 mass%Ni alloy sintered in nitrogen, HIP-treated in argon and finally resintered in nitrogen at 1723-1823 K in each treatment was in detail studied as a function of the microstructural defects.
Pores were observed as the structural defects in the specimens sintered in nitrogen. During the HIP-treatment, the pores changed to nickel pools with the size far smaller than that of the pores, resulting in the sharp increase in the strength of HIP-treated specimens. The nickel pools changed again to pores, when the specimens were resintered. The strength of specimens resintered at a higher temperature, however, showed a strength as high as 3.2 GPa, suggesting that the number density of micro-pores decreased greatly by the resintering. Discussion has been made on these results.
