Effect of Cr and Ni Contents on Microstructure and Properties of High Boron Stainless Steel Composite Plate

Abstract:

Two high boron alloyed stainless steel composite plates(HBASSCP) which have different Cr and Ni contents were prepared by composite casting and hot rolling process. By means of metallographic observation and x-ray diffraction analysis, the matrix microstructure of calding and core is ferrite and the boride phase in core material is identified as brittle Fe2B for HBASSCP which has lower Cr and Ni contents, while the matrix microstructure of calding and core and the boride phase are mainly austenite and (Fe,Cr)2B respectively for HBASSCP which has higher level of Cr and Ni contents. After solution treatment, ferrite had changed into martensite which do not have plasticity for composite plate with lower Cr and Ni contents, but the elongation and the tensile strength of HBASSCP with high contents of Ni and Cr has reached up to 12.45 % and 558MP respectively. The mechanical properties has met ASTM standard specification for borated stainless steel plate for nuclear application.

• Periodical: Advanced Materials Research (Volumes 535-537)
• Pages: 883-887
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.535-537.883
• Online since: June 2012
• Authors: Jing Liu, Ke Zhang, Guo Liang Xie
• Keywords: Boride Phase, High Boron Alloyed Stainless Steel Composite Plate (HBASSCP), Matrix Microstructure, Mechanical Property

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DOI: 10.1520/a0887-89r14