冷拔高碳钢丝织构演变分析

Microtexture evolution of cold drawing high carbon steel wire

利用电子背散射衍射分析(EBSD)方法对高碳钢丝拉拔及再结晶过程织构的演变过程及织构分布进行了研究.研究发现随钢丝应变量的增加,钢丝中除了典型的〈110〉丝织构外,还存在比较明显的〈112〉织构,并且随着应变量的增加〈110〉织构的强度逐渐增加;同时,在ε=1.9时,钢丝表层〈110〉强度及所占比例大于中心部分,而〈112〉织构强度弱于中心部分;在经过600℃退火再结晶后钢丝中产生的再结晶织构与形变织构相同,仍然为〈110〉和〈112〉织构,并且随退火时间延长,织构强度不断变弱.

Texture exerts a significant influence on the mechanical properties of the steel wire,while the investigation of texture in the high carbon steel wire is not enough at home,so the development of texture and the difference between core and periphery during drawing of industrial high carbon steel wire has been studied by electron backscatter diffraction（EBSD） in the scanning electron microscope.It is shown that apart from the formation of an axial 〈110〉component,the steel textures also contain a significant 〈112〉component at different degrees of deformation.At the same time,the texture of steel wire（ε=1.9） was studied from periphery to core.It is found that the intensity and volume fraction of 〈110〉component in the periphery is higher than that in the core,while the 〈112〉component is lower.On the other hand,it is found that the recrystallization texture is composed of the same components as texture of drawn wires（〈110〉and〈112〉） after annealing at 600℃ and the acuity of the texture decreases with lengthened annealing.