Detection and characterization method of intergranular fracture and trans-granular fracture of WC grains in WC-Co alloy

• Main Authors: PENG YU, ZHOU HUATANG, XIE CHENHUI
• Format: Patent
• Language: Chinese; English
• Published: 24.11.2017
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The invention discloses a detection and characterization method of intergranular fracture and trans-granular fracture of WC grains in WC-Co alloy. The method successively comprises the following steps: conducting a bending strength test or an impact toughness test on a hard alloy test strip and recording a result; carrying out surface binder phase Co removal treatment on a fracture sample of a sample strip; cleaning and drying; observing trough a scanning electron microscope, and taking view pictures of different parts; counting grain number of hard phase WC grains of intergranular fracture and trans-granular fracture in the fracture sample (the total number is not lower than 200), calculating the proportion of trans-granular fracture grains, namely trans-granular fracture rate being characterized in the specification, and catalyzing and obtaining the relation between trans-granular fracture rate and bending strength or impact toughness. According to the invention, qualitative and quantitative analysis of int