Work-Hardening and Deformation Mechanism of Cold Rolled Low Carbon Steel

Wang Su-Fen,Peng Yan,Li Zhi-Jie

doi:10.19026/rjaset.5.5028

Wang Su-Fen, Peng Yan + Show 1 more

Open Access

https://doi.org/10.19026/rjaset.5.5028

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Abstract

The study reports the mechanical property and microstructure of cold rolled low carbon steel and its work-hardening behavior in the deformation process. The tensile test in room temperature of low carbon steel was implemented for the different cold rolling deformation, the stress-strain curve was draught according to the relationship between strength and deformation and fitted for the polynomial fitting, the strain hardening exponent (n) of test steel was calculated by the Hollomon method. In the whole cold deformation process, the work-hardening of cold rolled steel is significant, work-hardening rate has different degrees decreasewith the deformation increase. The strain hardening exponent is simple and dislocation strengthening is the major cause of hardening processing. The microstructure of test steel was observed after different deformation, the room temperature organization is the ferrite and few pearlite. The original grain is equiaxial and the average grain size is about 23.5 um, and pearlite distributes in ferrite grain boundaries. It was consequently established the cold deformation energy according to dislocation model, the cold deformation energy is main concerned on the plastic deformation to resistance and the initial stress.

Highlights

Cold rolled sheet belt and its extension product is the most widely used steel varieties which has beautiful surface, good processing performance, high size precision, widely used in vehicles, ships and household electrical appliances, (González et al, 2010; Liu et al, 2003)
In the condition of hot rolling products confirmed for the original cold rolling, the performance of cold rolling low carbon steel is determined by cold deformation and after heat treatment process conditions (Abou-Msallem et al, 2010; Kandavel et al, 2009)
Mechanical property: Figure 1a shows the tensile test results of test steel in different deformation in the room temperature, the yield and tensile strength are gradually raise with the increase of the deformation and generate evident work-hardening (M'Guil et al, 2011)

Summary

Introduction

Cold rolled sheet belt and its extension product is the most widely used steel varieties which has beautiful surface, good processing performance, high size precision, widely used in vehicles, ships and household electrical appliances, (González et al, 2010; Liu et al, 2003).

Results

Conclusion