In situ observation of the evolution of intragranular acicular ferrite at Mg-containing inclusions in 16Mn Steel
The effects of chemical compositions and austenitizing temperature on the formation of intragranular acicular ferrite (IAF) of 16Mn steel, a grade of low alloying steel with carbon content of 0.13~0.19％ and manganese content of 1.20~1.60％, were systematically investigated. The in situ observation of the evolution of IAF at Mg-containing inclusions was carried out using a high-temperature laser scanning confocal microscopy. The results show that trace amount of Mg can induce the IAF nucleation, while the optimum content of Mg is around 0.0022wt％. The appropriate austenitizing temperature is around 1200℃ and the optimal prior austenite grain size is about 130μm. The temperature range for IAF transformation is around between 571℃ and 627℃, and the time for which is about 12s. The disregistries between Mg-containing inclusions and α-Fe are so small that may act as highly effective nuclei of IAF.
magnesium inclusions intragranular acicular ferrite lattice disregistry
Bin WEN Bo SONG
State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083，China Metallurgical and Ecological Engineering School, University of Science and Technology Beijing, Beijing 100083，China
国际会议
Ninth International Conference on Molten Slags,Fluxes and Salts(第九届国际熔渣、溶剂与熔盐学术会议 MOLTEN12)
北京
英文
1-15
2012-05-27（万方平台首次上网日期，不代表论文的发表时间）