焊管2025，Vol.48Issue(10)：1-6,6.DOI:10.19291/j.cnki.1001-3938.2025.10.001
冷金属过渡电弧增材制造GH4169合金工艺与性能研究
Study on Process and Properties of GH4169 Alloy Fabricated by Cold Metal Transition Arc Additive
唐思熠 1周行龙 2郭宏业 3宋宗贤2
作者信息
- 1. 中国航空发动机集团有限公司,北京 100097
- 2. 天津中德应用技术大学 航空航天学院,天津 300350
- 3. 天津中德应用技术大学 机械工程学院,天津 300350
- 折叠
摘要
Abstract
For systematically investigates the cold metal transition arc additive manufacturing(CMT-WAAM)process of GH4169 alloy,focusing on its forming laws,microstructure,and mechanical property anisotropy.Through single-pass cladding layer experiments,process parameters including wire feeding speed of 3～8 m/min and welding speed of 1.5～4.0 mm/s were optimized using the relative range of cladding layer width and reinforcement as evaluation indicators.The optimal process combination was determined as a wire feeding speed of 7 m/min and welding speed of 2.5 mm/s.Based on these parameters,30 layers of single-pass multi-layer samples were prepared,and metallographic analysis,Vickers hardness testing,multi-directional tensile and impact testing were conducted to reveal their microstructural characteristics and mechanical properties.The results show that the forming quality of the cladding layer is excellent under the optimal process conditions,and the multi-layer samples have no defects with clear interlayer interfaces.The as-deposited microstructure mainly comprises columnar crystals grown epitaxiallyalong the deposition direction(with a width of about 1 µm),containing a small amount of cellular crystals.The mechanical properties show significant anisotropy,with a tensile strength of 642 MPa at a 45°angle,which is 7.9%and 12.6%higher than those in the transverse and longitudinal directionsrespectively.Moreover,the longitudinal impact toughness(5 744 kJ/m²)is 9.9%higher than that in the transverse direction.This study demonstrates that CMT-WAAM enables high-quality forming of GH4169 alloy;its performance anisotropy mechanism provides theoretical and data support for engineering applications.关键词
GH4169合金/增材制造/微观组织/力学性能Key words
GH4169 alloy/additive manufacturing/microstructure/mechanical property分类
矿业与冶金引用本文复制引用
唐思熠,周行龙,郭宏业,宋宗贤..冷金属过渡电弧增材制造GH4169合金工艺与性能研究[J].焊管,2025,48(10):1-6,6.
