何波,邢盟,孙长青,杨光.热处理对激光沉积TC4/TC11组织和性能的影响[J].稀有金属材料与工程,2019,48(6):1929~1935.[He Bo,Xing Meng,Sun Changqing,Yang Guang.Effect of Heat Treatment on Microstructure and Properties of Laser DepositionTC4 / TC11[J].Rare Metal Materials and Engineering,2019,48(6):1929~1935.]
热处理对激光沉积TC4/TC11组织和性能的影响
投稿时间:2018-02-01  修订日期:2018-03-10
中文关键词:  激光沉积制造  钛合金  热处理  显微组织  性能
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目);国家重点研发计划项目(2017YFB1104002);工信部民用飞机专项科研项目(MJZ-2016-G-71);国家自然科学基金项目(51371173),辽宁省教育厅科学研究项目(L201738),航空制造工艺数字化国防重点学科实验室开放基金(SHSYS2017007)
中文摘要:
      通过对激光沉积TC4/TC11钛合金直接过渡件沉积态和热处理态的显微组织、静载力学性能、拉伸断口及显微硬度进行对比研究,探索改善激光沉积TC4/TC11钛合金组织,进而提高综合力学性能的途径。研究结果表明,沉积态试样在970 ℃热处理后α板条的长宽比小于沉积态和退火态,两侧组织均呈现典型的网篮组织特征且更为均匀,晶界α相彻底消失,过渡界面基本消失,使得TC4/TC11组织参数最优化;沉积态、去应力退火和固溶时效(最优热处理参数)热处理后试样的拉伸断口为韧性断口且均断在了TC4侧,其中固溶时效热处理后试样强度没有明显降低,塑性得到显著提高,具有良好的综合力学性能;当热处理温度提高到970 ℃(最优热处理参数),该试样沿着整个过渡界面显微硬度值分布最均匀、差异最小,基体与过渡界面处显微硬度值变化也最小。
Effect of Heat Treatment on Microstructure and Properties of Laser DepositionTC4 / TC11
英文关键词:Laser deposition manufacturing  titanium alloy  heat treatment  microstructure  property
英文摘要:
      By comparing the microstructure, static mechanical properties, tensile fracture and microhardness of laser deposited TC4 / TC11 titanium alloy direct transitional parts in the as-deposited and heat-treated states, the approaches to perfect the microstructure of laser deposition TC4/TC11 alloy so as to improve its integrated mechanical properties were explored,. Results show that after the as-deposited sample undergoes 970℃ heat treatment, its length-width ratio of α laths is less than that of as-deposited and annealed samples. The microstructure on the two sides is featured by basket-weave structure and more even. In addition, the grain boundary α disappears entirely. There is almost no existence of transitive interface, which optimizes the textural parameters of TC4/TC11 titanium alloy. For all the as-deposited, relieved-stress and solution aging samples (optimal heat treatment parameters), their tensile fractures are tough fracture and their fracture sections are all on the side of TC4 titanium alloys. Among them, the strength of solution aging sample is not reduced greatly. Moreover, its plasticity is remarkably enhanced. So it has excellent integrated mechanical properties. When the temperature of the heat treatment raises to 970℃ (optimal heat treatment parameters) microhardness of TC4/TC11 titanium alloys is uniform along the whole transitive interface with minimum differences. At the same time, microhardness changes the most slightly on the matrix and transitive interface.
作者单位E-mail
何波 沈阳航空航天大学 机电工程学院 hebo1978@163.com 
邢盟 沈阳航空航天大学 机电工程学院 17702408299@163.com 
孙长青 沈阳工程学院 机械学院  
杨光 沈阳航空航天大学航空制造工艺数字化国防重点学科实验室  
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