对截面减小率为80%的冷拉拔纯铁丝分别在723,823,923 K进行退火处理,采用精确线材织构测定方法测定了纯铁丝在退火前后的织构组成,并研究了纯铁丝在退火过程中的显微组织与织构演变.结果表明:退火前纯铁丝的主要织构组分为〈110〉丝织构,取向分布函数(ODF)分析发现〈110〉丝织构主要包括{001}〈110〉,{113}〈110〉,{112}〈110〉,{111}〈011〉,{233}〈011〉等织构类型;退火后,纯铁丝的织构类型与拉拔织构相同,主要织构组分仍为〈110〉丝织构;随着退火温度的升高,织构强度有增加趋势,同时织构强度沿着线材径向分布呈现一定规律的变化;在退火处理过程中,纯铁丝的显微组织由纤维状逐渐向多边形块状转变.

Cold-drawn pure iron wires with the cross section reducing rate of 80% were annealed at different temperatures of 723,823 and 923 K. The texture of the pure iron wires was investigated by X-ray diffraction with a modified texture measurement method. The results show that 〈110〉 fiber texture was the main texture component of the cold-drawn pure iron wires. By the virtue of the orientation distribution function (ODF),texture components such as {001}〈110〉,{113}〈110〉,{112}〈110〉,{111}〈011〉 and {233}〈011〉 were obtained. After annealing,main texture components of the pure iron wires were still 〈110〉 fiber texture. With the increase of annealing temperature,intensity of the texture components was raised. The variation of the texture existed along the diameter of the wire. During the annealing process,microstructure of the pure iron wires changed from fiber shape to polygonal block shape.