Effect of Large-Thickness TC4 Titanium Alloy Narrow Gap Weld Structure on Mechanical Properties of Joints
- Vol. 53, Issue 8, Pages: 8-15(2023)
DOI: 10.7512/j.issn.1001-2303.2023.08.02
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杨清福,曾才有,张宇鹏,等.大厚度TC4钛合金窄间隙焊接接头组织性能研究[J].电焊机,2023,53(8):8-15.
YANG Qingfu, ZENG Caiyou, ZHANG Yupeng, et al.Effect of Large-Thickness TC4 Titanium Alloy Narrow Gap Weld Structure on Mechanical Properties of Joints[J].Electric Welding Machine, 2023, 53(8): 8-15.
围绕磁控窄间隙TIG焊接(MCNG-TIG)和真空电子束焊接(EBW)大厚度TC4钛合金接头微观结构不均匀性及其对接头力学行为的影响进行了对比研究。利用扫描电子显微镜对两种接头中部焊缝区和热影响区不同区域的微观组织进行了表征,并对接头截面显微硬度分布和室温拉伸性能进行测定。结果表明,两种接头焊缝区皆为网篮组织,但MCNG-TIG焊缝中α板条宽度比EBW焊缝更加细小。热影响区为初生α相+β转变组织构成的混合组织。随着距焊缝中心的距离增大,β转变组织含量降低。MCNG-TIG热影响区中β转变组织比EBW热影响区更加细小。MCNG-TIG接头平均硬度分布为:热影响区>母材>焊缝;EBW接头平均硬度值分布为:焊缝>热影响区>母材。两种接头的室温拉伸强度系数皆达到0.9以上,EBW接头强度和延伸率略高于MCNG-TIG接头。MCNG-TIG接头室拉伸断裂位置位于靠近母材的热影响区,而EBW接头断裂位置位于焊缝中心。拉伸应变演化结果表明,MCNG-TIG接头在拉伸早期阶段在焊缝中和靠近母材的热影响区同时出现了应变峰值区域。随着拉伸的进行,双应变峰值区特征消失,塑性应变主要集中在靠近母材的热影响区。
A comparative study was conducted focusing on the microstructural inhomogeneities and their effect on the mechanical behavior of magnetically controlled narrow gap TIG welding (MCNG-TIG) and vacuum electron beam welding (EBW) of large-thickness TC4 titanium alloy joints. The microstructure of different regions, including the weld zone and heat affected zone, in the middle of the two joints was characterized using scanning electron microscopy. Moreover, the micro-hardness distribution and room temperature tensile properties of the joint sections were measured. The results showed that the weld zone of both joints had a basketweave structure. But the α lath width in the MCNG-TIG weld was finer than that of the EBW weld. The heat-affected zone is a mixture of primary α phase + β-transformed structure. The content of β-transformed structure decreases with increasing distance from weld seam center. β-transformed structure in the MCNG-TIG heat affected zone is finer than that in the EBW heat affected zone. The average hardness distribution of the MCNG-TIG joints is: heat affected zone > base metal > weld seam; the average hardness value distribution of the EBW joints is: weld seam > heat affected zone > base metal. The room temperature tensile strength coefficients of both joints were above 0.9, and the strength and elongation of EBW joints were slightly higher than those of MCNG-TIG joints. The room tensile fracture location of MCNG-TIG joints was located in the heat-affected zone near the base metal, while the fracture location of EBW joints was in the weld seam center. The tensile strain evolution results showed that in the early stage of tensile testing, the MCNG-TIG joints showed both peak strain regions in the weld and in the heat affected zone near the base material. As the tensile proceeds, the double strain peak region feature disappears and the plastic strain is mainly concentrated in the heat-affected zone near the base metal.
钛合金大厚板窄间隙焊接真空电子束焊组织不均匀性力学性能
titanium alloylarge-thickness platenarrow gap weldingEBWmicrostructure inhomogeneitymechanical properties
常辉, 董月成, 淡振华, 等.我国海洋工程用钛合金现状和发展趋势[J]. 中国材料进展, 2020, 39(Z1):585-590+557-558.
CHANG H,DONG Y C,DAN Z H,et al. Current status and development trend of titanium alloy for marine engineering in China[J]. Materials China, 2020, 39(Z1):585-590+557-558.
方乃文, 黄瑞生, 武鹏博, 等.钛合金激光填药芯焊丝接头组织性能[J]. 焊接学报, 2023,44(03):61-69+132.
FANG N W, HUANG R S, WU P B, et al. Study on microstructure and properties of laser flux-cored wire joint of titanium alloy [J].Transactions of the China Welding Institution. 2023,44(03):61-69+132.
安飞鹏,王其红,李士凯,等. 钛合金厚板窄间隙焊接技术的现状[J]. 焊接技术, 2014, 43(12): 1-5.
AN F P, WANG Q H, LI S K. et al. Current status of narrow gap welding technology for titanium alloy thick plates[J]. Welding Technology, 2014, 43(12): 1-5.
孙清洁, 李文杰, 胡海峰, 等. 厚板Ti-6Al-4V磁控窄间隙TIG焊接头性能[J]. 焊接学报,2013,34(02): 9-12+113.
SUN Q J, LI W J, HU H F, et al. Analysis on welded joint of thick Ti-6Al-4V plate by magnetically controlled narrow-gap TIG welding[J]. Transactions of the China Welding Institution,2013,34(02):9-12+113.
余陈,张宇鹏,徐望辉,等. 厚板TC4钛合金磁控窄间隙TIG焊接工艺[J]. 电焊机,2018,48(01):52-56.
YU C, ZHANG Y P, XU W H, et al. Study on magnetically controlled narrow-gap TIG welding of thick plate TC4 titanium alloy[J]. Electric Welding Machine, 2018, 48(01): 52-56.
关峰, 倪家强, 刘广鑫, 等. 大厚度TC4-DT钛合金电子束焊接接头微观组织和力学性能研究[J]. 航空制造技术, 2017(03):74-77.
GUAN F, NI J Q, LIU G X, et al. Research of Microstructure and Mechanical Properties of EBW Joint for Large Thickness Titanium Alloy[J]. Aeronautical Man-ufacturing Technology, 2017(03):74-77.
宋凯, 毛小南, 辛社伟, 等. 钛合金焊接接头组织性能研究进展[J]. 材料导报, 2018, 32(S2): 336-340.
SONG K, MAO X N, XIN S W, et al. Research Progress Microstructure and Properties of Titanium Alloy Welded Joints[J]. Materials Reports, 2018, 32(S2): 336-340.
崔庆龙. 厚板钛合金窄间隙TIG焊接过程中温度场分析[J]. 硅谷, 2015, 8(01): 52-54.
CUI Q L. Temperature field analysis during narrow gap TIG welding of thick plate titanium alloy[J]. Silicon Valley, 2015, 8(01): 52-54.
方乃文,黄瑞生,谢吉林,等. 大厚度 TC4 钛合金超窄间隙激光填丝焊接头组织性能研究[J]. 电焊机,2022, 52(6): 25-34.
FANG N W, HUANG R S, XIE J L, et al. Study on properties and microstructures of large thickness TC4 titanium alloy welded joint by ultra-narrow gap Laser welding using filler wire[J].Electric Welding Machine, 2022, 52(6): 25-34.
张宇鹏,丁来法,Valerii Bilous,等. 厚板TC4钛合金电子束焊接头组织演变及力学性能[J]. 电焊机,2022, 52(6): 87-92.
ZHANG Y P, DING L F, Bilous Valerii, et al. Microstructure Evolution and Mechanical Properties of Electron Beam Welded Joint of Thick Plate TC4 Titanium Alloy[J]. Electric Welding Machine, 2022, 52(6): 87-92.
乔亮,苏轩,陶汪, 等. TC4钛合金不同焊接工艺下组织性能对比[J].热加工工艺,2016,45(03):19-22+30.
QIAO L, SU X, TAO W, et al. Comparison of Microstructure and Properties of TC4 Alloy Under Different Welding Processes[J]. Hot Working Technology, 2016, 45(03): 19-22+30.
安飞鹏,邓贤辉,刘千里,等. 大厚度TA31合金窄间隙焊接和电子束焊接对比研究[J]. 材料开发与应用, 2020, 35(05): 81-86.
AN F P, DENG X H, LIU Q L, et al. Study of Narrow Gap TIG Welding and Electron Beam Welding of Thick TA31 Alloy[J]. Development and Application of Materials, 2020, 35(05): 81-86.
温锦志,卜文德,李建萍,等. 厚板TC4钛合金电子束焊接头组织和力学性能研究[J]. 热加工工艺, 2016,45(17):66-69,73.
WEN J Z,PU W D,LI J P,et al. Study on Microstructure and Properties of Thick TC4 Alloy Joints Welded by Electron Beam[J]. Hot Working Technology, 2016, 45(17): 66-69, 73.
方乃文,郭二军,徐锴,等. 钛合金激光填丝焊缝晶粒生长及相变原位观察[J]. 中国有色金属学报, 2022,32(06):1665-1672.
FANG N W, GUO E J, XU K, et al. In-situ observation of grain growth and phase transformation in laser welding of titanium alloy with filler wire[J]. The Chinese Journal of Nonferrous Metals, 2022, 32(06):1665-1672.
徐德志. 大厚板TC4钛合金窄间隙焊接接头组织演变规律及性能强化机制研究[D]. 四川:西南交通大学, 2019.
XU D Z. Investigation of Microstructure Evolution and Properties Strengthening Mechanisms of Narrow-Gap Welded Great Thick TC4 Titanium Alloy Joints[D]. Sichuan: Southwest Jiaotong University, 2019.
方乃文. TC4钛合金厚板窄间隙激光填丝焊及组织性能调控[D]. 黑龙江:哈尔滨理工大学, 2022.
FANG N W. Controlling of Microstructure and Properties of TC4 Titanium Alloy Thick Plate Narrow-gap Laser Welding with Filler Wire[D]. Heilongjiang: Harbin University of Science and Technology, 2022.
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