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| Effect of heat treatment technology on reversed austenite in super martensitic stainless steel |
| JIANG Wen1， ZHAO Kun-yu1， YE Dong1， LI Jun1， SU Jie2， YONG Qi-long2 |
1. College of Material Science and Engineering， Kunming University of Science and Technology， Kunming 650093， Yunnan， China
2. Department of Structural Materials， Central Iron and Steel Research Institute， |
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Abstract Beijing 100081， China) The effect of adding different content of Cr to the super martensitic stainless steel (SMSS) on formation of reversed austenite subjected to quenching and tempering by using optical microscope(OM)， X-ray diffraction (XRD)， transmission electron microscope (TEM) and energy dispersive spectrometer(EDS) was studied. The experimental results indicate that the microstructures of two tested steels were tempered martensite and reversed austenite after tempering. The volume fraction and grain size of reversed austenite in two tested steels increased first and then decreased with the increase of tempering temperature， which reached the maximum at 650-700 ℃. When the reversed austenite re-dissolved and transformed to martensite， there was an effect of refinement on the matrix. Compared with 13Cr steels， the reversed austenite in 15Cr steels was more and the size was bigger. The effect of refinement on the matrix was more obvious.
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Received: 15 April 2014
Published: 02 February 2015
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2015, Vol. 50 
