Effect of Rolling Temperature on the Structural Refinement and Mechanical Properties of Dual-Phase Heterostructured Low-Carbon Steel

Warm rolling at temperatures ranging from 25 °C to 500 °C was conducted on the dual-phase heterostructured low-carbon steel to investigate the effect of deformation temperature on the structural refinement and mechanical properties. Defying our intuition, the grain size and strength of the rolled steels do not deteriorate with the increase in deformation temperature. Warm rolling at 300 °C produces a much finer lamellar structure and higher strength than steels rolled at both room temperature and elevated temperature. It is supposed that the enhanced interactions between carbon atoms and defects (interfaces and dislocations) at 300 °C promote dislocation accumulation and stabilize the nanostructure, thus helping with producing an extremely finer structure and higher strength than other temperatures.

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Impact of Cold-Rolling and Heat Treatment on Mechanical Properties of Dual-Phase Treated Low Carbon Steel

Advances in Materials Science and Engineering ◽

10.1155/2020/1674837 ◽

2020 ◽

Vol 2020 ◽

pp. 1-9

Author(s):

Le Van Long ◽

Dinh Van Hien ◽

Nguyen Truong Thanh ◽

Nguyen Chi Tho ◽

Van Thom Do

Keyword(s):

Mechanical Properties ◽

Carbon Steel ◽

Low Carbon Steel ◽

High Strength ◽

Processing Parameters ◽

Dual Phase ◽

Low Carbon ◽

Forming Process ◽

Good Ductility ◽

Rolling Deformation

The low carbon steel has good ductility that is favorable for forming process, but its low strength leads to limiting their application for forced structures. This paper studied improving strength of low-carbon steel via rolling deformation and dual-phase treatment. The results showed that the dual-phase treated steel had a combination of high strength and good ductility; its tensile ultimate strength reached 740 MPa with elongation at fracture of over 15%, while that of the cold-rolled steel only reached 700 MPa with elongation at fracture of under 3%. Based on the obtained results, relationships between mechanical properties and dual-phase processing parameters were established to help users choose suitable-processing parameters according to requirements of products.

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Grain Refinement through Warm Rolling of Wedge-Shaped Low Carbon Steel

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.383-390.5869 ◽

2011 ◽

Vol 383-390 ◽

pp. 5869-5873 ◽

Cited By ~ 1

Author(s):

Rini Riastuti ◽

R. Bastian M. ◽

Dedi Priadi ◽

Eddy S. Siradj

Keyword(s):

Mechanical Properties ◽

Carbon Steel ◽

Grain Refinement ◽

Low Carbon Steel ◽

Warm Rolling ◽

Low Carbon ◽

Warm Temperature ◽

Working Temperature ◽

Warm Working ◽

Fine Grain

Study of grain refinement has developed to improving the mechanical properties of low carbon steel. Wedge shaped slab of low carbon steel were deformed through warm rolling methods of 500, 550, and 600oC to produce a finer ferrite grains. The thickness reduction of deformation is 80, 75, 67 and 50% .Dynamic recrystallizations were confirmed at warm working temperature in this study. Grains size which obtained through this process could improve the hardness and its mechanical properties and also its performance in corrosive environment. The smallest grain size was obtain from 80% deformation is 5.2 µm and the tensile strength is 817.65 MPa. Its gives the evidence that warm rolling can use to produce the fine grain at warm temperature of 600oC.

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