Effect of Controlled Rolling and Cooling On Microstructure and Mechanical Properties of 30crmnti Wire Rod

International Conference on Materials Sciences and Nanomaterials

材料科学;物理学

Ruan, Shipeng^1,2,3 ; Dong, Qing^2,3 ; Zhang, Lei^2,3 ; Wang, Lijun^2,3

Metallurgy Engineering Research Institute, University of Science and Technology Beijing, Beijing

100083, China^1

Xingtai Iron and Steel Corp. Ltd., Xingtai

054027, China^2

Hebei Engineering Research Center for Wire Rod, Xingtai

054027, China^3

关键词: Alloy structure steel;    Controlled rolling and cooling;    Finish rolling temperature;    Grain size;    Microstructure and mechanical properties;    Reduction of areas;    Wire rod;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/230/1/012035/pdf
DOI  :  10.1088/1757-899X/230/1/012035

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The effect of controlled rolling and cooling on microstructure and mechanical properties of alloy structure steel 30CrMnTi wire rod with diameter 6.5mm was studied. The results show that the lower finish rolling temperature resulted in a decrease in tensile strength but an increase in elongation and reduction of area. When the finish rolling temperature decreases from 950°C to 850°C, the tensile strength value decreases from 750MPa to 660MPa, and the elongation increases from 21% to 30%, the reduction of area increases from 64% to 71%. The grain size also refines from 20μm to 9.9μm when the finish rolling temperature decreases from 950°C to 850°C. The decrease of tensile strength is due to the change of microstructure which evolved from more bainite to ferrite and pearlite.