Influence of Ausforming Treatment of 0.4wt%C Steel Modified With Nb on the Microstructure and Hardness Properties
Article Sidebar
Main Article Content
Abstract
In the present work the relationship between the microstructure and the hardness of the Steel both with and without an addition of niobium was studied. Investigation by direct observation using optical microscopy was carried out.
The purpose of this work was to analyze the effects of the low thermomechanical treatment of ausforming on the final microstructure and hardness of steel and of the same steel modified with niobium.
It was found that the deformation during low thermomechamical treatment of ausforming introduces changes in the microstructure, such as carbide precipitation, which affect the hardness of the steel.
The results show that the mechanical properties of the ausformed Steel depend on the deformation temperature, amount of deformation. The addition of niobium lead to change in the hardness of the Steels investigated.
Metrics
Article Details
This work is licensed under a Creative Commons Attribution 4.0 International License.
THIS IS AN OPEN ACCESS ARTICLE UNDER THE CC BY LICENSE http://creativecommons.org/licenses/by/4.0/
Plaudit
References
- N. Hansen and B. Bay," Fabrication strain Rate - stress corrosion property correlations of thermomechanically treated 15Cr 15 Ni 2.2MO titanium modified austenitic stainless steel",MaterSci, vol. 7, 1996 pp 1351- 1362.
- F.a. garner, M.L. Hamilton , "effects of radiation on materials" 2005, pp29 -36.
- O.D. Sherby, "Thermomechanical processing and mechanical proper-ties of hyper-eutectoid steels and cast iron " 1997 pp 117 – 125.
- C. Martini, G. Palombarini, "Effect of dynamic recrystallization on microstructural evolution during rolling ," Mater. Sci., vol.30, 2007, pp 216 – 225. DOI: https://doi.org/10.2355/isijinternational.30.216
- R.W. Mayes, "A survey on microstructural evolution of two vanadiummicro alloy steels in the thermomechanical forging the treatment ", Mater. Sci. Eng, vol.79, 1996, pp87- 95 .
- J.G. Speer and S.S. Hansen, "effect of thermomechamical treatments on the high temperature deformation of tool steels of SKD11 " , Metall. Trans. , vol. 20A, 2008, PP25 -38.
- D.L. Cocks, "Bainite in steel, trans-formation , microstructure and properties " Heat. Treat. Met.,vol.2, 1999, pp 39- 44.
- J.M. Roland and X. Quillard, "Effect of Recrystallization and room temperature tensile properties of a FeзAL. Based alloy " Mater. Sci and Tech , vol.7, 2001, PP589- 594.
- W. Roberts, A. Sandberg, "Hot working and forming processes ",Metals society, 2009, pp 38- 42.
- Zackay and Justusson "Improving mechanical properties of micro alloy steels by modified thermomechamical treatments", 1999 , pp121- 127.
- W.Gerberich, C.Martin, " Extreme austenite grain refinement dut to dynamic recnystallization" Metall. Trans., vol.3A, 1995, pp 2619- 2631.
- D.Bhandarkar and Zackay, " Effect of alloying elements on dynamic recnystallization in HSLA steels", Metall. Trans., vol. 7A, 1997, PP 1511- 1518.
- T.Maki and M.wayman , " Micro-structure evolution of C.Mn steels in the hot deformation process", Mater. Sci., vol.60, 2002, pp 566- 570.