Funct. Mater. 2019; 26 (4): 767-772.

doi:https://doi.org/10.15407/fm26.04.767

Study on the modification of Cr₁₂MoV die steel by titanium

Fu Sijing¹, Jiang Binghua², Wang Jing², Cheng Hong²

¹School of Mechanical Engineering, Chengdu Technological University, Chengdu, 611730 Sichuan, China
²School of Materials Engineering, Chengdu Technological University, Chengdu, 611730 Sichuan, China

Abstract:

In this paper, Cr₁₂MoV die steel was modified by Ti. Microstructural analysis of samples with different Ti contents was performed and mechanical properties were measured. The results show that after the Ti modification, the microstructure of Cr₁₂MoV die steel shows obvious changes. The carbide network is broken, and many little lumpy and granular phases are produced as well. The tensile strength and hardness of Cr₁₂MoV die steel have a slightly increase, but the impact toughness is improved remarkably. When the Ti content is 0.5 wt.%, the impact toughness is 2.8 times that of unmodified Cr₁₂MoV die steel.

Keywords:

Cr<sub>12</sub>MoV steel, Ti modification, microstructure, mechanical properties.

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References:

1. X.F.Wu, K.Ma, N.Xu et al., Die Mould Industry, 35, 55 (2009).

2. W.Shi, J.L.Wang, Z.Wang et al., Trans. Mater. Heat Treatment Proc. the 14th Ifhtse Congress, 25, 837, 2004.

3. J.Wang, S.J.Fu, H.Cheng et al., Hot Working Techn., 42, 75 (2013).

4. J.Chen, Mater. Heat Treat., 31, 97 (2006). https://doi.org/10.1111/j.1540-5818.2006.00125.x

5. F.Yu, D.Xu, D.Luo, J. Iron Steel Res, 20, 1 (2008).

6. D.B.Wei, H.Yang, T.Li, Hot Work. Techn., 36, 7 (2007).

7. D.B.Wei, H.Yang, R.C.Xie, Foundry, 56, 1098 (2007).

8. H.G.Fu, J.H.Liu, J.D.Xing, J. Iron Steel Res., 15, 39 (2003).