Influence of Heat Treatment on Mechanical Properties and Microstructure of Low Alloy Cast Steel (ZG25MnNi)

Abstract:

In this paper, the influence of heat treatment temperature on the microstructure and mechanical properties of cast steel (ZG25MnNi) was investigated. The results showed that normalizing treatment can effectively refine cast microstructure of ZG25MnNi and maximum hardness achieved at 900°C. After normalized at 900°C, the sample tempered at 500°C,530°C,560°C, 590°C, 620°C, 650°C respectively. With the tempering temperature increasing, the samples tensile strength increased gradually and elongation decreased gradually. When tempered at 530-590°C, the sample had a relatively high strength plastic product. The results showed that the best normalizing temperature is 900°C and the optimum tempering temperature is 530-590°C.

• Periodical: Advanced Materials Research (Volumes 887-888)
• Pages: 207-213
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.887-888.207
• Online since: February 2014
• Authors: Teng Shi Liu, Yi Tao Yang*
• Keywords: Heat Treatment, Mechanical Property, Microstructure, ZG25MnNi

References

[1] S. Hashimoto, S. Ikeda, K. Sugimoto and S. Miyake: ISIJ Int., 44(2004), 1590.

[2] Hamidreza Najafi, Jafar Rassizadehghani, Siroos Asgari. As-cast mechanical of vanadium/niobium microalloyed steels. Materials Science and Engineering A. 486 (2008), 1-7.

DOI: 10.1016/j.msea.2007.08.057

[3] JIANG Zhi-qiang, DU jian-ming, FENG xi-lan. Study and Application of Heat Treatment of Multi-Element Wear-Resistant Low-Alloy Steel. Journal of iron and steel research, international. 2006, 13(1): 57-61.

DOI: 10.1016/s1006-706x(06)60027-7

[4] Zhiying Ma, Jing Fang, Yitao Yang. Properties Improvement of Low Alloy Wear Resistant Steel Casting for Coa1-Mining Machinery. Foundry, 2011, 3：302-306. (In Chinese).

[5] Shanping LU, Shitong WEI, Zhiquan LIU, Dianzhong LI and Yiyi LI. Effects of Normalizing Process on the Microstructural Evolution and Mechanical Properties of Low Carbon Steel Weld Metal with Niobium Addition. ISIJ internationl, Vol. 50(2010).

DOI: 10.2355/isijinternational.50.248

[6] Zhi-jun Hu, Yi-tao Yang. Effects of normalizing and tempering temperature on mechanical properties and microstructure of low alloy wear resistant steel casting. Advanced Materials Research Vols. 602-604(2013): 294-299.

DOI: 10.4028/www.scientific.net/amr.602-604.294

[7] Y. Ohmori: Trans. Iron Steel Inst. Jpn., 11(1971), 339.

[8] Marder.A. R，et al，Met. Trans., 7A(1976), 1801.