EFFECT OF CARBON AND BORON ON MECHANICAL PROPERTIES AND MICROSTRUCTURE OF AN IRON BASE SUPERALLOY
Guo Jianting Institute of Metal Research; Academia Sinica
Cite this article:
Guo Jianting Institute of Metal Research; Academia Sinica. EFFECT OF CARBON AND BORON ON MECHANICAL PROPERTIES AND MICROSTRUCTURE OF AN IRON BASE SUPERALLOY. Acta Metall Sin, 1980, 16(1): 30-129.
Abstract The effect of carbon and boron on the stress rupture properties at 600 and750℃ as well as on the tensile properties at room temperature and 650℃ of a35Ni15Cr type iron base alloy has been investigated. Both carbon and boronseemed to be markedly influential in the stress rupture life of the alloy whichreached its peak value with 0.03--0.05%C and about 0.006% B. However, thenotched-rupture sensitivity was hardly affected. The increment of boron content maycause lowering the eutectic temperature of boron-γ phase. The amount of borideeutectic increases with the increase of boron content and the solution treatmenttemperature. Minute boron-γ phase eutectic less affected the room temperaturetensile properties, but markedly shortened the rupture life.
