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采用模角Φ=120°的模具,以BC方式(两次挤压道次之间试样绕纵轴沿同一方向转动90°进行下一道次挤压)在室温下成功实现了工业纯钛8道次等径弯曲通道变形(ECAP),对挤压过程中各道次试样的微观结构及性能进行了分析测试.结果表明:工业纯钛经8道次ECAP变形后,抗拉强度由407 MPa升高到791 MPa;显微硬度由1 588 MPa升高到2 641 MPa;并保持良好的塑性,伸长率为19%.
Using a die with a mode angle of Φ = 120 °, a commercial pure titanium 8 (commercially available from Siemens) was successfully obtained at room temperature in BC mode (with the specimen between two extrusion passes rotated 90 ° in the same direction about the longitudinal axis for the next press) (ECAP) were used to analyze the microstructure and properties of each pass during extrusion.The results showed that the tensile strength of industrial pure titanium after ECAP deformation was changed from 407 MPa increased to 791 MPa; the microhardness increased from 1 588 MPa to 2 641 MPa; and good plasticity was maintained with an elongation of 19%.