Effect of stainless steel fibers on properties of MgO–C refractories
Jian-zhao Shang1, Bao-liang Liu2, Kai Shi1, Yang Liu1, Yong-hao Mi1, Wen-hao Fan1, Yi-xian He1
1 School of Material Science and Engineering, Henan University of Technology, Zhengzhou 450001, Henan, China 2 Henan Industrial School, Zhengzhou 450001, Henan, China
Effect of stainless steel fibers on properties of MgO–C refractories
Jian-zhao Shang1, Bao-liang Liu2, Kai Shi1, Yang Liu1, Yong-hao Mi1, Wen-hao Fan1, Yi-xian He1
1 School of Material Science and Engineering, Henan University of Technology, Zhengzhou 450001, Henan, China 2 Henan Industrial School, Zhengzhou 450001, Henan, China
摘要 MgO–C refractories with stainless steel fibers were prepared to investigate the effects of stainless steel fibers addition on the thermal shock resistance, oxidation resistance, and microstructure of MgO–C refractories, and the optimum amount of stainless steel fibers was determined. The results showed that adding stainless steel fiber in MgO–C refractories can increase flexural strength and thermal shock resistance, with an optimal addition of 2 wt.%, owing to the bridging effect and crack deflection toughening of stainless steel fibers inside the material. The formation of MgAl1.9Fe0.1O4 composite spinel, which was responsible for higher oxidation resistance, produced volume expansion and prevented the diffusion of oxygen. The strengthening mechanism is physical embedding at room temperature, while it is reaction bonding at high temperature.
Abstract：MgO–C refractories with stainless steel fibers were prepared to investigate the effects of stainless steel fibers addition on the thermal shock resistance, oxidation resistance, and microstructure of MgO–C refractories, and the optimum amount of stainless steel fibers was determined. The results showed that adding stainless steel fiber in MgO–C refractories can increase flexural strength and thermal shock resistance, with an optimal addition of 2 wt.%, owing to the bridging effect and crack deflection toughening of stainless steel fibers inside the material. The formation of MgAl1.9Fe0.1O4 composite spinel, which was responsible for higher oxidation resistance, produced volume expansion and prevented the diffusion of oxygen. The strengthening mechanism is physical embedding at room temperature, while it is reaction bonding at high temperature.
Jian-zhao Shang,Bao-liang Liu,Kai Shi, et al. Effect of stainless steel fibers on properties of MgO–C refractories[J]. Journal of Iron and Steel Research International, 2023, 30(11): 2186-2193.
2023, Vol. 30 
