文章信息/Info

Title:

Effect of Multi-Pass Drawing and Tensile Straightening on the Residual Stress of High-Carbon Steel Wire

文章編號:

1674-3962(2021)06-0427-05

作者:

蔡磊1; 朱建國1; 程亮1; 2; 張帥今2; 唐斌3

（1. 盛利維爾（中國）新材料技術(shù)股份有限公司，江蘇 常州 213000）（2. 江蘇理工學(xué)院材料工程學(xué)院，江蘇 常州 213001）（3. 西北工業(yè)大學(xué) 凝固技術(shù)國家重點(diǎn)實(shí)驗(yàn)室，陜西 西安 710072）

Author(s):

CAI Lei1;  ZHU Jianguo1;  CHENG Liang1; 2;  ZHANG Shuaijin2; TANG Bin3

（1. Sunnywell (China) New Material Technology Co., Ltd., Changzhou 213000, China) （2. School of Materials Engineeing, Jiangsu University of Technology, Changzhou 213001, China) （3. State key Laboratory of Solicffication Processing, Northwestern Polytechnical University, Xi’an 710072, China)

關(guān)鍵詞:

高碳鋼絲; 拉拔成形; 數(shù)值仿真; 拉伸矯直; 殘余應(yīng)力

Keywords:

high-carbon steel wire;  draw drawing;  numerical simulation;  tensile straightening;  residual stress

分類號:

TG356.2+3

DOI:

10.7502/j.issn.1674-3962.202009008

文獻(xiàn)標(biāo)志碼:

A

摘要:

針對T9高碳珠光體鋼絲多道次拉拔及后續(xù)拉伸矯直過程中的軸向殘余應(yīng)力演變進(jìn)行分析。首先通過實(shí)驗(yàn)測量獲得了鋼絲盤條在大變形下的應(yīng)力應(yīng)變關(guān)系，然后基于abaqus有限元軟件建立了多道次拉拔過程的數(shù)值模型，并結(jié)合實(shí)驗(yàn)結(jié)果驗(yàn)證了模型的可靠性。利用所建立的數(shù)值模型進(jìn)行了8個(gè)道次的拉拔仿真，結(jié)合塑性流動理論揭示了殘余應(yīng)力形成的演變規(guī)律。另外，利用數(shù)值仿真研究了鋼絲經(jīng)拉伸矯直后殘余應(yīng)力的變化。結(jié)果表明，拉拔后鋼絲的軸向殘余應(yīng)力分布很不均勻，表層為正、心部為負(fù)；拉拔道次對鋼絲殘余應(yīng)力的影響較小，略微提高了殘余應(yīng)力并降低了其均勻性；后續(xù)拉伸矯直對殘余應(yīng)力的影響非常顯著，0��6%~1%的拉伸變形即可顯著降低殘余應(yīng)力，使其分布更加均勻。

Abstract:

This study was carried out to investigate the evolution of axial residual stress in high-carbon steel wire during multi-pass drawing and the subsequent tensile straightening. Firstly, the stress-strain relationship of the steel rod under severe deformation was obtained by means of tensile experiments. Then a numerical model for multi-pass drawing was constructed based on abaqus finite-element software, which has been verified by comparison with the experimental results. By using the numerical model, an eight-pass drawing process was simulated, and the formation and evolution mechanism of the residual stress has been revealed. After that, the variation of the residual stress after tensile straightening has been studied by numerical simulation. The results showed that, the distribution of the axial residual stress is highly inhomogeneous after drawing, which exhibit positive in the skin region and negative in the center region. The drawing passes had slight effect on the residual stress of the steel wire. In contrast, significant effect was observed after the subsequent tensile straightening. A tensile deformation as small as 0.6%~1% can dramatically reduce the residual stress, resulting a more homogeneous distribution of the residual stress in the wire.