Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1628092 | Journal of Iron and Steel Research, International | 2016 | 7 Pages |
Abstract
Microstructural evolution, precipitation behavior, and tensile properties of four experimental Mo-bearing steels were studied to elucidate the effects of Nb and V on microstructural properties. The results indicated that the microstructure of hot-rolled steels consisted of polygonal ferrite and degenerate pearlite, and the morphology remained same after holding at 600 °C for 1 h. The smallest grain size was obtained in Nb-V-Mo containing steel, followed by Nb-Mo and V-Mo steels. Precipitation was less in the hot-rolled Mo-bearing steel. The maximum volume fraction of precipitates was obtained in Nb-V-Mo bearing steel, and the Nb-V-Mo complex carbonitrides were highly stable at 600 °C. In the Mo-bearing steel, the yield ratio was lowest at room temperature but highest at 600 °C, which was attributed to the precipitation of Mo carbides and drag effect of Mo solute on dislocation movement.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Fu-ming LIU, Jian-jun WANG, Yu-jie LIU, R.D.K. MISRA, Chun-ming LIU,