Microstructure and Mechanical Properties of Ultra-High Strength Pearlitic Wire in Single-pass Cold Drawing

2018 3rd International Conference on Advanced Materials Research and Manufacturing Technologies

材料科学;机械制造

Wei, M.Z.^1 ; Chen, Z.H.^1 ; Zhang, X.M.^1 ; Wang, D.P.^1 ; Sun, K.^1 ; Zhou, J.^1,2 ; Xue, F.^1,2

Jiangsu Key Laboratory for Advanced Metallic Materials, Southeast University, Nanjing

211189, China^1

Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology, Nanjing Institute of Technology, Nanjing

211189, China^2

关键词: Compression rates;    Fine grain strengthening;    Microstructure and mechanical properties;    Single pass compressions;    Strengthening mechanisms;    Torsional properties;    Torsional strength;    Ultra high strengths;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/436/1/012001/pdf
DOI  :  10.1088/1757-899X/436/1/012001

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The effect of compression ratio on the microstructure and mechanical properties of ultra-high strength pearlitic wire in single-pass cold drawing has been studied. The ultra-high tensile strength cord steel with a carbon content of 1.02 wt% were pulled through a single-pass drawing to different compression ratios (0-30%). With the increase of the single-pass compression ratio, the tensile strength, microhardness and torsional properties of the steel wire increased gradually. When the compression rate increased from 0 to 30%, the tensile strength of the steel wire increased from 1263.4 MPa to 1553.7 MPa, the torsional strength of steel wire increased from 1126.83 MPa to 1279.66 MPa. In the single-pass drawing process, the strengthening mechanism of the pearlitic steel wire are mainly the work hardening caused by the dislocation slip in the ferrite, and the fine grain strengthening caused by the decrease of the pearlite sheet spacing.