Journal
JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
Volume 22, Issue 12, Pages 1164-1173Publisher
SPRINGER
DOI: 10.1016/S1006-706X(15)30128-X
Keywords
nitrogen content; austenitization temperature; Nb(C, N) precipitation; alloyed cementite
Categories
Funding
- CITIC-CBMM Niobium Steel Research and Development Program of China [2013-D065]
Ask authors/readers for more resources
The influences of nitrogen content and austenitization temperature on Nb(C, N) precipitation in niobium micro-alloyed steels were studied by different methods: optical microscopy, tensile tests, scanning electron microscopy, transmission electron microscopy, physicochemical phase analysis, and small-angle X-ray scattering. The results show that the strength of the steel with high nitrogen content is slightly higher than that Of the steel with low nitrogen content. The increase in the nitrogen content does not result in the increase in the amount of Nb(C, N) precipitates, which mainly depends on the niobium content in the steel. The mass fraction of small-sized Nb(C, N) precipitates (1-10 nm) in the steel with high nitrogen content is less than that in the steel with low nitrogen content. After austenitized at 1150 degrees C, a number of large cuboidal and needle-shaped particles are detected in the steel with high nitrogen content, whereas they dissolve after austenitized at 1200 degrees C and the Nb(C, N) precipitates become finer in both steels. Furthermore, the results also show that part of the nitrogen in steel involves the formation of alloyed cementite.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available