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The effects of heat treatment on the precipitation of Cr carbides in Ni-base Alloy 600 laser surface melted by a CO 2 laser beam were investigated with microscopic equipment. Aging treatment at 600 o C for 24 h induced precipitation of Cr-rich M 23 C 6 and Cr 7 C 3 carbides on some high angle grain boundaries, and the minimum Cr concentration along...
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