| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 8004407 | Journal of Iron and Steel Research, International | 2016 | 6 Pages |
Abstract
The Thermo-Calc software was employed to calculate the equilibrium phase of 22Cr-27Ni-2Ti-Al austenitic valve steel, and the Laves phase in this steel was investigated after solid solution and aging by means of scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffraction (XRD). Results show that the microstructure of the experimental steel consists of γ, γâ², Laves and NbC. Laves phases mainly precipitate on grain boundaries, with granular and fibrous morphologies. The size of the granular Laves phase is about 50-600 nm, and the fibrous Laves phase is composed of short strip Laves phases which are 300-600 nm in length and 50-150 nm in width. These two morphologies of Laves phase coarsen with increasing aging temperature, and this steel possesses the highest strength and hardness at aging temperature of 760 °C.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Li-min WANG, Cheng-cheng XUE, Gang YANG, Zheng-dong LIU,