钛合金板材制备技术的现状及展望(下)——中厚板制备技术

Review of Titanium Alloy Plate Rolling Technology(Part 2)--Plate Forming Technology

梳理了钛合金中厚板制备技术的概况,整理了不同组织类型(等轴、全片层、网篮组织)钛合金中厚板轧制成形过程的控制要点,分析了钛合金中厚板制备技术的现状及问题,并给出了解决方案。通过梳理近α钛合金、α?+β钛合金和β钛合金的制备工艺,分析板材轧制过程的显微组织和织构特征,对比不同组织类型板材的力学性能,提出了钛合金中厚板析出相、组织、织构及性能的调控方法,阐明了钛合金中厚板制备技术的关键控制要点,剖析了钛合金中厚板产品的现存问题,包括翘曲度问题、残余应力大、超声探伤水平不稳定性等,并给出了具体解决方案。最后,展望了国内钛合金板材制备技术的3项研究重点和2个发展方向,旨在推进钛合金板材关键产品的特种制造和常规产品的标准化作业水平。

In this paper,the forming technology of titanium alloy plate was summarized,the control points of the rolling process of titanium alloy plate with different structure types(equiaxed structure,full lamellar,basket wave structure)were summarized,the present situation and problems of the forming technology of titanium alloy plate were analyzed,and the solutions are given.By combing the forming technology of near α titanium alloy,α+β titanium alloy and β titanium alloy,the microstructure and texture characteristics of rolling process of plate were analyzed,and the mechanical properties of plate with different microstructure types were compared.The control methods of precipitation,microstructure,texture and properties of titanium alloy plate were proposed,and the key control points of forming technology of titanium alloy plate were expounded.The existing problems of titanium alloy plate products,including warp degree problem,large residual stress,the instability of ultrasonic inspection level and so on,were analyzed,and specific solutions were given.Finally,three research priorities and two development directions of domestic titanium alloy sheet and plate forming technology were prospected in order to promote the specific manufacturing of key products and the standard operation level of conventional products of titanium alloy sheet and plate.