Study on the Influence of Nano-SiC on the Structure and Properties of Nodular Cast Iron

3rd Annual International Workshop on Materials Science and Engineering

Zhu, Ruixiang^1 ; Su, Yong^1 ; Qin, Xinyu^1

School of Materials Science and Engineering, Hefei University of Technology, Hefei

230009, China^1

关键词: After-heat treatment;    Casting structures;    Heat treatment process;    Isothermal quenching;    Metallographic structure;    Microstructure and mechanical properties;    Spheroidization rates;    Structure and properties;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/250/1/012051/pdf
DOI  :  10.1088/1757-899X/250/1/012051

来源: IOP

【 摘 要 】

In this paper, the effect of adding Nano-SiC on the structure and mechanical properties of nodular cast iron during inoculation and spheroidizing process is mainly studied. Three sets of samples were set up: one group is without adding Nano-SiC, and the other two groups are adding Nano-SiC in the spheroidizing process and inoculation step. The three groups of castings were sampled from the core and 1/4 respectively and treated by isothermal quenching. The influences of Nano-SiC and heat treatment process on the microstructure and mechanical properties of nodular cast iron were discussed through the observation of impact work, hardness and metallographic structure of Vivtorinox. The experimental results show that with the addition of Nano-SiC, the spheroidization rate, spheroidization degree and graphitization of the graphite in casting structure are improved. In mechanical properties, the impact toughness of the samples with adding Nano-SiC during inoculation is the best, and the hardness of nodular cast iron can be improved. After heat treatment, the impact toughness of nodular cast iron samples increased obviously, but the hardness decreased generally.