Investigation Of Structure, Property And Inclined Plate Cooling Of Fe-0.77C-1.4B Alloy

Fe-0.77C-1.40B alloy was investigated in this paper. Structure and property of Fe-0.77C-1.40B alloy were investigated in as-cast and heat treatment. On this basis, Structure and property of Fe-0.77C-1.40B alloy were investigated by inclined plate cooling. And influence heat treatment on structure and property of Fe-0.77C-1.40B alloy was investigated at last. The results show that the as-cast structure of the Fe-0.77C-1.40B alloy was consisted by the ferrite, pearlite, Fe23(C,B)6 and a small amo-unt of martensite and Fe3C by XRD. Property of Fe-0.77C-1.40B alloy was not influen-ced by different normalizing temperature.Liquid quenching structure of Fe-0.77C-1.40B alloy was investigated. The results show that that the structure of the Fe-0.77C-1.40B alloy was consisted by the ferrite, pearlite, Fe23(C,B)6 and a small amount of martensite and Fe3C by inclined plate cool-ing. Inclined plate cooling in 600mm or 800mm in length, the Fe-C-B alloy primary austenite grain size on a certain area, the average cross-sectional diameter is the small-est and shape factor is the most in different angle of inclined cooling plate.primary austenite grain size was refined best. At the same plate temperature, pouring temperature conditions, the Fe-C-B alloy primary austenite grain size was refined best at 30°angle. wherever, the refinement of Fe-C-B alloy primary austenite grain is harmful to impact toughness.Structure and property of Fe-0.77C-1.40B alloy was studied by inclined plate cooling. The results show that refinement of primary austenite particles is no significant increase toughness of Fe-0.77C-1.40B alloy solidification under conditions of sand. the primary austenite percentage was increased and hard phase Fe23(C,B)6 percent was decreased by inclined plate cooling, and the hardness was decreased comparing with conditions of sand.Besides, The results also show that the morphology of eutectic structure and distribution did not changed at different methods of heat treatment, but the primary austenite and eutectic austenite transformation product was changed only, so property of Fe-0.77C-1.40B alloy was changed.