电流波形对2209双相不锈钢双丝增材制造的影响  

Influence of Current Waveform on Dual-wire Additive Manufacturing of 2209 Duplex Stainless Steel

作　　者：陈文仕 何日恒 金礼 姚屏 Chen Wenshi;He Riheng;Jin Li;Yao Ping(School of Physics and Mechatronic Engineering,Guizhou Minzu University,Guiyang 550025,China;Teacher Training College,Guangdong Normal University,Guangzhou 510665,China;College of Intelligent Manufacturing and Electrical Engineering,Guangzhou Institute of Science and Technology,Guangzhou 510540,China)

机构地区：[1]贵州民族大学物理与机电工程学院,贵阳550025 [2]广东技术师范大学师培学院,广州510665 [3]广州理工学院智能制造与电气工程学院,广州510540

出　　处：《机电工程技术》2025年第4期46-49,111,共5页Mechanical & Electrical Engineering Technology

基　　金：国家自然科学基金资助项目(51805099);广东省教育厅重大专项资助项目(2020ZDZX2019);贵州省省级科技计划项目(ZK[2022]198,ZK[2024]063)。

摘　　要：为了探究电流波形对增材制造的影响,采用了CMT-P和DC-P两种电流波形进行2209双相不锈钢双丝电弧增材制造试验,对比研究了增材制造试样的形貌组织和机械性能。结果表明,在相同的熔覆速率下,CMT-P模式增材制造试样层与层之间纹路清晰且熔宽均匀一致,成型精度较高,优于DC-P模式。两种增材制造试样微观组织都主要为α铁素体和γ奥氏体,两者没有显著差异。CMT-P模式增材制造试样的显微硬度优于DC-P模式,前者平均显微硬度为164 HV_(0.3),最大显微硬度为179.7 HV_(0.3),后者平均显微硬度为160 HV_(0.3),最大显微硬度161 HV_(0.3)。两种电流波形增材制造试样的拉伸性能比较接近,横向的最大抗拉强度分别为526 MPa和511 MPa,纵向的最大抗拉强度均为546 MPa,且两者断裂方式均为韧性断裂。因而CMT-P模式电弧增材制造试样优于DC-P模式。To investigate the influence of current waveform on additive manufacturing,wire arc double-wire additive manufacturing of 2209 duplex stainless steel is conducted using two current waveforms,CMT-P and DC-P,and the morphology and mechanical properties of the additive manufacturing samples are comparatively studied.It is shown that,at the same cladding rate,clear texture between the layers and consistent weld width are observed in the additive manufacturing samples using the CMT-P mode,and the forming accuracy is higher,being superior to the DC-P mode.The microstructure of both additive manufacturing samples is mainly composed ofα-ferrite andγ-austenite,and no significant difference is observed between the two.The microhardness of the additive manufacturing samples using the CMT-P mode is superior to that of the DC-P mode,with the average microhardness of the former being 164 HV_(0.3),and the maximum microhardness being 179.7 HV_(0.3),while the average microhardness of the latter is 160 HV_(0.3),and the maximum microhardness is 161 HV_(0.3).The tensile properties of the additive manufacturing samples using both current waveforms are relatively close,with the maximum transverse tensile strengths being 526 MPa and 511 MPa,respectively,and the maximum longitudinal tensile strength being 546 MPa for both,and the fracture mode of both being ductile fracture.Therefore,the additive manufacturing samples using the CMT-P mode are superior to those using the DC-P mode.

关 键 词：电流波形 电弧双丝增材制造 2209双相不锈钢 力学性能 微观组织 

分 类 号：TG4[金属学及工艺—焊接]