Microstructure Observation of the Tensile Fractured 430 Ferritic Stainless Steel

Abstract:

The article studies on sections microstructure of 430ferritic stainless steel after tension, the tensile temperatures are the 1073K, 1173K, 1223K, 1273K, 1323K and 1423K. The transverse sections (vertical tensile direction) of fractured specimens microstructure of 430ferritic stainless steel were observed and compared with those of longitudinal sections (parallel tensile direction). Moreover, we compare microstructure of transverse section specimens with the salt water-cooled condition and air-cooled condition. The optical micrograph of fractured tensile specimens of 430stainless steel after cooling to room temperature indicated that the volume fraction of the martensite is gradually increased and then declined from 1073K to 1423K. At 1223K, the martensite content is highest. At 1423K, martensite is sharply reduced and disappeared, the microstructure of 430ferritic stainless steel is almost all of ferrite and grain boundary obviously observed. Due to tensile deformation, the morphology of martensite is massive in the transverse section specimens. Whereas, the strip-type morphology of martensite was observed in the longitudinal section specimens. The cooling rate impact on the microstructure was also discussed.

• Periodical: Advanced Materials Research (Volumes 887-888)
• Pages: 228-232
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.887-888.228
• Online since: February 2014
• Authors: Shu Jun Zang, Juan Juan Li, Xiao Qiang Yin*, Jian Bin Zhang
• Keywords: 430 Ferritic Stainless Steel, Elevated Temperature, Hot Deformation, Microstructure

References

[1] Shi-ying Lu. Overview of stainless steel [M]. Beijing, China Science and Technology Press, 10-13, (2007), In Chinese.

[2] Shi-ying Lu, Yan-kai Zhang, Xi-fan Kang. Stainless steel[M]. Beijing. Atomic Energy Press. 79-85, (1995), In Chinese.

[3] Si-yue Chen, Jing Xu, Xin Zhang, Yi-tao Yang. Heat treatment of metals, 02, (2003).

[4] Lian-hong Yang, Long-jiao Li, Ya-zheng Liu, Le-yu Zhou. Heat treatment of metals, 12, (2011).

[5] Xin-zhong Liu, Jing-tao Han, Wan-hua Yu, He-jie Li. Heat treatment of metals, 03, (2007).

[6] Jin-cheng Hu, Hong-mei Song, Lai-zhu Jiang. Baogang research institute, 04, (2007).

[7] Jiu Wu. Duplex stainless steel [M]. Beijing. Metallurgical Industry Press. 280-282, (1999).

[8] Geng-xiang Hu, Xun Cai, Yun-hua Rong. Fundamentals of Materials Science[M]. Shanghai Jiao-tong University Press, 07, (2006).

[9] A. Dehghan-Manshadi, M.R. Barnett, P.D. Hodgson, Materials Science and Engineering A, 485: 664–672, (2008).

[10] Majumdar, Dutta J, et al. JOM, 56(11): 107, (2004).

[11] Feng J, Ferreira M G S, Vilar R. Surface and Coatings Technology, 88: 212-218, (1996).

[12] Tassin C, et al. Surface and Coatings Technology, 80(1-2): 207-210, (1996).