铅浴淬火珠光体钢丝冷拔过程中显微组织及织构的演变
Evolution of Microstructure and Texture of Lead-Patenting Treated Pearlite Steel Wire during Cold Drawing Process
摘 要
采用透射电镜、扫描电镜和电子背散射衍射系统等对铅浴淬火处理的珠光体钢丝以及经不同道次冷拔后钢丝的显微组织与织构进行了分析.结果表明:铅浴淬火处理后钢丝重新形成了无畸变的等轴晶粒,且获得了均匀的索氏体组织;钢丝在冷拔过程中,珠光体片层间距和渗碳体片层厚度随着钢丝直径减小而近似呈线性减小,渗碳体片层具有一定的塑性变形能力;在整个冷拔变形过程中,钢丝心部、中部和边部各区域的铁素体基体协调变形,平行于拉拔方向的铁素体〈110〉丝织构组分的面积分数逐渐增加,但其增加速度在某一区域内并不是不变的,而是具有交替性;随着真应变增大,〈110〉丝织构的强度不断增加,非关联最小取向差-频率曲线偏离Mackenzie分布,并在10°～20°和45°～60°取向差范围内出现峰值.
显微组织
织构
取向差
lead-patenting treated steel wire
microstructure
texture
misorientation
Abstract
The microstructure and texture evolution of pearlitic steel wires after lead patenting (LP) treatment and after cold drawing for different passes were analyzed by means of transmission electron microscopy (TEM),scanning electron microscopy (SEM) and electron back scattering diffraction (EBSD)systerm .The results indicate that the undistorted and equiaxial grains formed in the pearlite steel wire after LP treatment and uniform sorbite was obtained.The pearlite interlamella spacing and the thickness of cementite lamellae decreased linearly with the decrease of the diameter of the steel wire,in addition,the cementite lamellae exhibited plastic deformation ability to some extent.During the cold-drawing process,the ferritic matrix showed coordination deformation from the center to surface.Although the area fraction of 〈110〉 fiber texture of ferrite parallel to the drawing direction increased gradually with the increase of true strain,its growth rate was inhomogeneous.The strength of 〈110〉 fiber texture increased constinuously and the distribution of uncorrelated misorientation angle-relative frequency curves deviated from Mackenzie distribution with the increase of true strain,meanwhile,there were two peaks appeared at the range of 10°-20°and 45°-60°.
中图分类号 TG142.21
所属栏目 试验研究
基金项目 国家科技支撑计划项目(2007BAE15B01);四川省应用基础研究项目(2014JY0132);四川省高等学校重点实验室开放科研项目(13FTFH01-2014);攀枝花学院校级科研项目(2013YB28)
收稿日期 2014/11/18
修改稿日期 2015/3/9
网络出版日期
作者单位点击查看
备注肖玄(1986-),男,重庆人,讲师,硕士.
引用该论文: XIAO Xuan,CHEN Min,WU Yong-gang. Evolution of Microstructure and Texture of Lead-Patenting Treated Pearlite Steel Wire during Cold Drawing Process[J]. Materials for mechancial engineering, 2015, 39(5): 13～18
肖玄,陈敏,伍永刚. 铅浴淬火珠光体钢丝冷拔过程中显微组织及织构的演变[J]. 机械工程材料, 2015, 39(5): 13～18
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参考文献
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【2】OCHIAI M,NISHIDA S,OHBA H,et al.Application of hypereutectoid steel for development of high strength steel wire[J].Tetsu-to-Hagan,1993,79:1101-1107.
【3】王利明,杨恒,吴建峰,等.热处理工艺对中碳钢丝显微组织及其拉拔性能的影响[J].材料导报,2011,25(17):523-525.
【4】曹秀岭,翟振华.帘线钢丝铅浴淬火与水浴淬火组织性能对比[J].金属制品,2010,36(4):39-41.
【5】董述峰,赵刚,叶传龙,等.ABAQUS软件对70钢丝铅浴淬火过程的模拟[J].金属热处理,2011,36(5):129-132.
【6】郭宁,栾佰峰,周正,等.不同热处理工艺盘条微观组织与力学性能分析[J].材料热处理学报,2012,33(4):44-49.
【7】ZELIN M.Microstructure evolution in pearlitic steels during wire drawing[J].Acta Materialia,2002,50:4431- 4447.
【8】LIU Y D,JIANG Q W,ZHAO X.Texture analysis and simulation of pearltic wire during drawing[J].Acta Metall Sin,2002,38:1215-1218.
【9】LIU Y D,JIANG Q W,WANG G,et al.Influence of microstructures and textures on torsional behavior of pearlitic wires[J].Journal of Materials Science & Technology,2005,21(3):357-360.
【10】LI S,HE S,BAEL A V,et al.FEM-aided tylor simulations of radial texture gradient in wire drawing[J].Mater Sci Forum,2002,408/412:439-444.
【11】张晓丹,GODFREY A,刘伟,等.珠光体钢丝冷拔过程中微观组织及铁素体微区取向与织构演变[J].金属学报,2010,46(2):141-146.
【12】WALENTEK A,SEEFELDT M,VERLINDEN B,et al.Investigation of pearlite structure by means of electron backscatter diffraction and image analysis of SEM micrographs with an application of the Hough transform[J].Materials Science and Engineering:A,2008,483/484:716-718.
【13】肖玄,张航,杨林江,等.盐浴淬火高碳珠光体钢丝在冷拔过程中的显微组织及织构演变[J].机械工程材料,2013,37(10):39-43.
【14】CHEN Y J,JARLE H,HANS J R.Application of EBSD technique to ultrafine grained and nanostructured materials processed by severe plastic deformation:sample preparation,parameters optimization and analysis[J].Trans Nonferrous Met Soc China,2012,22:1801-1809.
【15】陈绍凯,李晴宇,苗壮,等.电子背散射衍射(EBSD)及其在材料研究中的应用[J].稀有金属材料与工程,2006,35(3):501-504.
【16】ZHANG X D,GODFREY A,HUANG X X,et al.Microstructure and strengthening mechanisms in cold-drawn pearlitic steel wire[J].Acta Materialia,2011,59:3422-3430.
【17】LANGFORD G.Deformation of pearlite[J].Metallurgical and Materials Transactions:A,1977,8(6):861-875.
【18】桥梁缆索用冷拔珠光体钢丝微观组织表征及力学性能研究[D].重庆:重庆大学,2012:72-74.
【19】徐宁安,董登超,胡显军.钢铁材料中取向差/旋转轴分布的EBSD研究[J].电子显微学报,2010,29(5):443-448.
【20】DASHER B S,ADAMS B L,ROLLETT A D.Viewpoint:experimental recovery of geometrically necessary dislocation density in polycrystals [J].Scripta Materialia,2003,48(2):141-145.
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