Abstract:Typical morphology of tensile fracture and non- metallic inclusion in 82B wire rod were observed and detected, and surface quality and central structure of corroded metallographic specimen were inspected by means of scanning electric microscope (SEM) and optical microscope. Results show that the broken reason for the black center with white point fracture was the big slag inclusion; the broken reason for the plane shaped fracture was core martensite, central network cementite, border local carburetion and non- metallic inclusions; the broken reason for the cross section of chrysanthemum fracture was the core martensite and shrinkage cavity in central porosity; the broken reason for the split fracture was the carbonic segregation; the broken reason for the pencil- tip shaped fracture was the inversed V- type micro cracks and network cementite.
蔡小锋,包燕平,林路,顾超. 82B盘条断口典型形貌及产生原因分析[J]. 中国冶金, 2015, 25(08): 1-5.
CAI Xiao- feng,BAO Yan- ping,LIN Lu,GU Chao. Analysis on typical morphology of tensile fracture and broken reason of 82B wire rod. China Metallurgy, 2015, 25(08): 1-5.