摘要
针对等离子体电弧3D打印成形钛合金表面精度低、组织性能难以调控的技术难题,该文利用控制变量法,研究了工艺参数对堆积金属的尺寸参数与形状参数的影响规律,并通过优化得到最适宜的堆积工艺参数。堆积得到的Ti-6Al-4V构件可分为3个区域:顶层区域主要由粗大的α_(GB)和α_(M)构成;中间层区域的α_(M)长宽比明显减小,出现少量片层状组织(α colony);底层区域主要由相对均匀的网篮状α+β组成。通过实验测试,等离子体电弧3D打印得到的钛合金构件的尺寸误差小于2%,拉伸强度为1 150 MPa,构件的成形精度和力学性能均满足使用要求。
Aiming at the technical problems of low surface precision and difficulty to control the microstructure and properties of titanium alloys formed by plasma arc 3D printing,the influence of process parameters on the size and shape parameters of the deposited metal was studied through the control variable method,and the most suitable deposition process parameters were obtained by optimization.The Ti-6Al-4V component can be divided into three regions,the top region is mainly composed of coarsen αGB and αM,and the middle layer region includes a small amount of lamellar structure(α colony) and αM,the size of which decreased significantly,and the bottom area was mainly composed of relatively uniform basket-like α+β;The dimensional error of the titanium alloy components obtained by plasma arc 3D printing does not exceed 2%,and the tensile strength is 1 150 MPa.The forming accuracy and mechanical properties of the components meet the requirements for use.
作者
代轶励
吴息明
黄逸凡
喻学峰
康翼鸿
DAI Yili;WU Ximing;HUANG Yifan;YU Xuefeng;KANG Yihong(Materials Institutes Center,Shenzhen Institute of Advanced Technology,Chinese Academy of Sciences,Shenzhen 518055,China)
出处
《集成技术》
2022年第6期75-84,共10页
Journal of Integration Technology
基金
深港创新圈联合研发项目(SGLH20181109110802117)。
