Mo对钛合金激光焊接接头组织性能影响研究
Study on the Effect of Mo on the Microstructure and Properties of Titanium Alloy Laser Welding Joint
- 2025年55卷第1期 页码:73-79
纸质出版日期: 2025-01-20
DOI: 10.7512/j.issn.1001-2303.2025.01.10
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纸质出版日期: 2025-01-20 ,
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李传胜,王雷,郭糠,等.Mo对钛合金激光焊接接头组织性能影响研究[J].电焊机,2025,55(1):73-79.
LI Chuansheng, WANG Lei, GUO Kang, et al.Study on the Effect of Mo on the Microstructure and Properties of Titanium Alloy Laser Welding Joint[J].Electric Welding Machine, 2025, 55(1): 73-79.
通过制备不同Mo含量焊材,研究了Mo元素对钛合金激光焊接接头组织性能的影响规律。通过XRD、金相组织、维氏硬度、拉伸性能和冲击韧性对焊缝性能进行分析。结果显示,焊缝中心呈现为粗大的原始β相柱状晶,该柱状晶随着Mo含量的增加呈现出先增大、后减小的趋势。原始β晶粒内部存在着若干相互平行、交错的α
'
针状马氏体,该马氏体贯穿整个原始β晶粒并止于晶界。随着焊缝中Mo含量的增加,焊缝平均硬度呈先减少后增加的趋势,冲击韧性呈下降趋势。由于4%Mo的焊接接头内部存在气孔,650 ℃下的拉伸断裂位置位于焊缝,其余Mo含量接头的断裂位置均位于母材。
In this paper
the effect of Mo on the microstructure and properties of laser welded joints of titanium alloy superalloy was studied by preparing welding materials with different Mo content. The properties of welded joints were analyzed by metallographic structure
Vickers hardness
tensile properties and impact toughness. Experimental results show that the center of the weld is coarse original β-phase columnar crystal
which first increases and then decreases with the increase of Mo content. Several parallel and staggered α' acicular martensite exist in the original β grain
which run through the whole original β grain and disappear at the grain boundary. The average hardness of weld decreases first and then increases with the increase of Mo content in weld
and the impact toughness decreases Due to the presence of porosity in the welded joint of 4% Mo
the tensile fracture position at 650℃ was located in the weld
and the fracture positions of other Mo content joints were located in the base metal.
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