961(1Cr11Ni2W2MoV) Stainless Steel

Author】 Qu Zhidong;Cheng Guoguang;Wan Wenhua;Teng Lihong;Huang Yongsheng;Wang Rihong;Technical Center, ZENITH Steel Group Co., Ltd.;State Key Laboratory, University of Science and Technology Beijing;

【Abstract】 Depending on the 961(1Cr11Ni2W2MoV) stainless steel produced by a steel plant, the inclusions were tested and calculated. The results showed that the inclusions were mainly composed of Al2O3, Al2O3-MnO-CrOx and the composite inclusions of Al2O3-MnO-CrOx. With the thermodynamic software Fact Sage, the calculation results indicated that at the condition of high temperature, high oxygen content, high Mn content, low Cr content, and proper Al content, Al2O3-MnO-CrOx inclusions could be formed. Increasing of the content of Al, Mn and Cr in molten steel will lead to the increasing of the proportion of the oxide in the Al2O3-MnO-CrOx inclusions. The increasing of temperature and Oxygen content will decrease the Al2O3 content of the inclusions.The increasing of temperature and oxygen content, the decreasing of Al content will lead to the expansion of the Al2O3-MnO-CrOx inclusion area, as the temperature rise to a certain degree,there will be will no great change.Compared with simple Al deoxygenation, switching to Si or Si-Al deoxidization can improve the inclusion system of stainless steel.

961; 1Cr11Ni2W2MoV； Al2O3-MnO-CrO_x； Inclusion； thermodynamic calculation；