Effect of Solution Treatment Time on Microstructure and Martensitic Transformation Point of C250 Steel

Abstract:

The morphology of microstructure and PAG was observed by means of LEICA DMIRM metallurgical microscope, the phase was measured by D8 ADVANCE X-ray diffractometer (XRD), and the martensitic transformation point is tested on DIL805A dilatometer after ST. The results show that the PAG size of C250 steel has not a clear growth. The recrystallisation has the priority of nucleation in the PAG boundary. The morphology of martensite presents irregular bans and stringers before recrystallisation, whereas presents blocky thereafter. The intermetallic compounds re-dissolve by ST. With the prolonged of ST time, the Ms point increases before recrystallisation, decreases thereafter; the Mf point does not have a clear change.

• Periodical: Advanced Materials Research (Volumes 399-401)
• Pages: 195-199
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.399-401.195
• Online since: November 2011
• Authors: Xiao Zhen Hua, Zhen Wei Wei, Xin Yuan Peng, Xia Cui, Xian Liang Zhou
• Keywords: MS, Prior Austenite Grain (PAG), Recrystallization, Solution Treatment

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