Ni-cr alloy material

Details Ni-cr alloy material Ni-cr alloy material

C - Chemistry, Metallurgy

22

C

C22C 19/05 (2006.01) C22F 1/02 (2006.01) C22F 1/10 (2006.01) C22F 1/00 (2006.01) G21D 1/00 (2006.01)

Patent

CA 2723522

An Ni-Cr alloy material which attains excellent corrosion resistance even in high-temperature water environments. The alloy material has a uniform lattice strain (S) satisfying the relationships 1) and (2): S<=0.002 ... (1) S = D500 - D200 ... (2) wherein the meaning of each symbol is as follows: S: uniform lattice strain (.ANG.) of the surface layer D500: spacing (.ANG.) of {111} lattice planes at a depth of 500nm from the surface of material D200: average (.ANG.) of spacings of {111} lattice planes at depths of 200nm or below from the surface of material

L'invention porte sur un matériau d'alliage de Ni-Cr qui atteint une excellente résistance à la corrosion même dans des environnements d'eau à haute température. Le matériau d'alliage a une déformation de réseau (S) satisfaisant aux relations (1) et (2) : S 0,002           (1) S = D500 - D 200       (2) dans lesquelles la signification de chaque symbole est la suivante : S : déformation uniforme du réseau (?) de la couche de surface D500 : pas (?) des plans réticulaires {111} à une profondeur de 500 nm à partir de la surface du matériau D 200 : moyenne (?) des pas des plans réticulaires {111} à des profondeurs de 200 nm ou au-dessous à partir de la surface de la matière.

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