The Amount and Particle Size of Aluminum Nitride at Austenitic Grain Coarsening Temperatures in Various Low Carbon Steels

Kinoshita S., Ueda T., Suzuki A.

doi:10.2320/matertrans1960.13.1

The Amount and Particle Size of Aluminum Nitride at Austenitic Grain Coarsening Temperatures in Various Low Carbon Steels

DOI Web Site 参考文献3件

Kinoshita S.

Central Research Laboratory, Kobe Steel Ltd.
Ueda T.

Central Research Laboratory, Kobe Steel Ltd.
Suzuki A.

Central Research Laboratory, Kobe Steel Ltd.

抄録

The amount and particle size of aluminum nitride existing at austenitic grain coarsening temperatures in low carbon low alloy steels have been investigated. After the solution treatment of aluminum nitride at 1200°C and subsequent quenching, the austenitic grain coarsening temperatures were measured by heating for 5 hr at various austenitic temperatures. The bromine-ester technique was applied to the extraction of aluminum nitride and the amount of nitrogen composing aluminum nitride was determined. The particle size was measured using an electron microscopic technique. It is shown that the aluminum nitride of 60∼100 ppm in amount and 10⁻¹⁵ cm³ in average size is necessary to prevent the austenitic grain coarsening after the solution treatment.