高性能医疗器械用TC4ELI钛合金丝材的制备技术

Preparation Technology of TC4ELI titanium alloy wires for high performance medical and therapeutic apparatus

针对高性能医疗器械用钛合金材料国产化替代需求,开展TC4ELI钛合金丝材全流程制备技术研究。基于工业大生产流程,系统研究了热加工及热处理工艺对TC4ELI钛合金丝材显微组织和力学性能的影响。研究结果表明,退火温度为650~700℃,屈服强度Rp0.2大于900 MPa,退火温度高于700℃时,屈服强度Rp0.2小于900 MPa。采用“固溶+时效”热处理工艺可以获得屈服强度Rp0.2大于1100 MPa、抗拉强度大于1200 MPa级、伸长率大于10%、断面收缩率Z约50%的高性能丝材产品。开发的工业化制备“固溶+时效”的热处理工艺方案可操作性强,产品性能稳定,具备产业化供应能力。

The demand for the localization of high-performance titanium alloy materials for medical devices by conducting research on the full-process preparation technology of TC4ELI titanium alloy wires were addressed.Utilizing large-scale industrial production processes,it systematically investigates the effects of thermal processing and heat treatment on the microstructure and mechanical properties of TC4ELI titanium alloy wires.The research findings reveal that when the annealing temperature is between 650℃and 700℃,the yield strength exceeds 900 MPa.However,when the annealing temperature surpasses 700℃,the yield strength falls below 900 MPa.Through the application of a"solution treatment+aging"heat treatment process,high-performance wire products are achieved,characterized by a yield strength R_(p0.2)greater than 1100 MPa,tensile strength exceeding 1200 MPa,elongation above 10%,and a reduction of area Z around 50%.The industrial"solution treatment+aging"heat treatment process scheme developed in this study is highly feasible and ensures stable product performance,supporting its capability for industrial-scale supply.