Effect of Mo, W, V and Nb on the Properties of 38% Ni Heat-Resisting Alloy
1960 Volume 46 Issue 4 Pages 487-492
Details
1960 Volume 46 Issue 4 Pages 487-492
The Ni-Cr-Co-Mo heat resisting alloy which contains Ti and Al except for Mo, W, V and Nb shows superior heat-resistance due to precipitation of both intermetallic compounds of Ni and Ti, Al and carbides of Cr and Mo.
This report concerned the effect of Mo, W, V and Nb on the various properties of this alloy, and contained the experimental results on hardness as solution-treated and as aged, mechanical properties at room and high temperature, rupture strength, oxidation resistance and resultant microstructures.
The results obtaind were as follows:
(1) As the added element was increased, hardness after solution-treatment, as-aged hardness, tensile strength at room and high temperature, and then rupture strength was increased.
(2) Elongation, reduction of area, Charpy impact value and oxidation resistance were gradually decreased in parallel with the increase of added elements.
(3) Among the added elements, Nb was the most effective and Mo was the next, but the effect of W and V was hardly observed.
