期刊文献+
共找到6篇文章
< 1 >
每页显示 20 50 100
The effect of activating fluxes on the cathode spots in the activating TIG welding 被引量:1
1
作者 黄勇 王伯洋 +4 位作者 郭建航 刘永刚 黄健康 樊丁 余淑荣 《China Welding》 CAS 2023年第1期7-17,共11页
The cathode spots are a common phenomenon in the TIG(tungsten inert gas)welding process.However,it is rarely observed in the activating TIG welding process.This research is mainly focused on the effect of activating f... The cathode spots are a common phenomenon in the TIG(tungsten inert gas)welding process.However,it is rarely observed in the activating TIG welding process.This research is mainly focused on the effect of activating flux on cathode spots in the activating TIG welding.The characteristics and behaviors of cathode spots were investigated in activating TIG welding by the high-speed camera and the spectrograph.Three kinds of oxide(TiO_(2),SiO_(2),MnO_(2))and two halide(MnCl_(2),CaF_(2))activating fluxes are used in the activating TIG welding process.The results show that differ from the TIG welding,the oxide activating flux increases the number of cathode spots and decreases the velocity.The effect is the opposite for the halide activating flux.Moreover,the number of spots no longer varies with the current except TiO2 activating flux.As the temperature of the weld pool surface increases the spot moves away from the center.But this rule is not valid when silica and manganese compounds activating fluxes are used.The variation of cathode spots is caused by the oxide film reformed and the distribution of weld slag.The formation mechanism of cathode spots might be the impact of ions on the cathode surface and the strong electric field formed near the cathode surface. 展开更多
关键词 cathode spots behaviors activating tungsten inert gas welding high-speed photography spectrum
下载PDF
Comparison of feasibility,microstructure and performance of hybrid laser arc,activated flux tungsten inert gas and friction stir welding for thick plate of innovative ultra-pure ferritic stainless steel
2
作者 Jian Han Lian-meng Liu +4 位作者 Xin-ya Chen Min-fang Chen Lei Cui Yang-chuan Cai Yin-bao Tian 《Journal of Iron and Steel Research International》 SCIE EI CSCD 2022年第4期665-676,共12页
An innovative grade of ferritic stainless steel,ultra-pure 18Cr–2Mo thick plate,was designed and produced for special industrial application.In order to maintain its mechanical properties after joining,three advanced... An innovative grade of ferritic stainless steel,ultra-pure 18Cr–2Mo thick plate,was designed and produced for special industrial application.In order to maintain its mechanical properties after joining,three advanced joining methods,hybrid laser arc welding,activated flux tungsten inert gas welding and friction stir welding,were selected and conducted to connect the thick plates.The feasibility of three joining methods,the microstructure and mechanical properties were compared,and the results have demonstrated that the sound joint was successfully produced using the selected parameters through friction stir welding.The obtained hardness and impact toughness of the weld zone were satisfying.In terms of activated flux tungsten inert gas welding,the crack will be created due to microstructural brittleness.And as for hybrid laser arc welding,the weld zone is narrow,and the addition of wire during welding for the top weld metal area leads to higher formation ratio of low-angle grain boundaries,which is beneficial to performance of the joint.However,there is still a weak area in the fusion line of the welded joint.The result has illustrated that the welding of innovative ultra-pure ferritic stainless steel thick plate by friction stir welding is feasible. 展开更多
关键词 ULTRA-PURE ferritic stainless steel Hybrid welding ACTIVATED FLUX tungsten inert gas Friction STIR welding Microstructural evolution Mechanical property
原文传递
金属氯化物A-TIG焊熔深作用机理 被引量:8
3
作者 张兆栋 凡福群 《焊接学报》 EI CAS CSCD 北大核心 2013年第5期29-32,114,共4页
以KCl,MnCl2和ZnCl2三种金属氯化物为活性剂,在镁合金、铝合金及Q235钢表面进行交流A-TIG堆焊试验,从元素第一电离能的角度,研究了这三种活性剂对不同材料焊接熔深的影响规律,探讨了金属氯化物影响熔深的作用机理.结果表明,A-TIG焊过程... 以KCl,MnCl2和ZnCl2三种金属氯化物为活性剂,在镁合金、铝合金及Q235钢表面进行交流A-TIG堆焊试验,从元素第一电离能的角度,研究了这三种活性剂对不同材料焊接熔深的影响规律,探讨了金属氯化物影响熔深的作用机理.结果表明,A-TIG焊过程中,氯化物中的金属元素能够进入电弧导电空间,并影响电弧状态,焊接熔深与活性剂中金属元素的第一电离能密切相关.金属氯化物对不同材料熔深的影响规律相同,均随着活性剂中金属元素第一电离能的增加呈现先增加后降低的趋势. 展开更多
关键词 金属氯化物 交流钨极氩弧焊 熔深 电离能
下载PDF
Microstructure and mechanical properties of TIG/A-TIG welded AZ61/ZK60 magnesium alloy joints 被引量:7
4
作者 Bo QIN Fu-cheng YIN +2 位作者 Cheng-zong ZENG Jia-cheng XIE Jun SHEN 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2019年第9期1864-1872,共9页
The dissimilar joints of AZ61 and ZK60 magnesium alloys were obtained by tungsten inert gas arc(TIG)welding and activating tungsten inert gas arc(A-TIG)welding processes.Microstructure characterization shows that,the ... The dissimilar joints of AZ61 and ZK60 magnesium alloys were obtained by tungsten inert gas arc(TIG)welding and activating tungsten inert gas arc(A-TIG)welding processes.Microstructure characterization shows that,the fineα-Mg equiaxed dendrite crystals contained Mg17Al12 and MgZn2 particles in the fusion zone.The average size of theα-Mg grains in the fusion zone was refined to 19μm at welding current of 80 A,which resulted in the largest tensile strength of 207 MPa.The tensile strength and the width of the beam of the A-TIG welded AZ61/ZK60 joints showed strong dependence on the amount of TiO2.However,the inhomogeneity of the heat-affected zone near different base metals presented no significant effect on the mechanical properties of the welded joint. 展开更多
关键词 AZ61 ZK60 dissimilar joints tungsten inert gas arc(TIG)welding activating tungsten inert gas arc(A-TIG)welding inhomogeneity
下载PDF
Effects of graphene nanoplates on microstructures and mechanical properties of NSA-TIG welded AZ31 magnesium alloy joints
5
作者 Tao ZHANG Jun SHEN +3 位作者 Lu-qiang Lü Chun-min WANG Jia-xin SANG Dong WU 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2017年第6期1285-1293,共9页
The effects of graphene nanoplates(GNPs)on the microstructures and mechanical properties of nanoparticlesstrengthening activating tungsten inert gas arc welding(NSA-TIG)welded AZ31magnesium alloy joints were investiga... The effects of graphene nanoplates(GNPs)on the microstructures and mechanical properties of nanoparticlesstrengthening activating tungsten inert gas arc welding(NSA-TIG)welded AZ31magnesium alloy joints were investigated.It wasfound that compared with those of activating TIG(A-TIG),and obvious refinement ofα-Mg grains was achieved and the finestα-Mggrains of fusion zone of NSA-TIG joints were obtained in the welded joints with TiO2+GNPs flux coating.In addition,thepenetrations of joints coated by TiO2+GNPs flux were similar to those coated by the TiO2+SiCp flux.However,the welded jointswith TiO2+GNPs flux coating showed better mechanical properties(i.e.,ultimate tensile strength and microhardness)than those withTiO2+SiCp flux coating.Moreover,the generation of necking only occurred in the welded joints with TiO2+GNPs flux. 展开更多
关键词 graphene nanoplate nanoparticles strengthening activating gas tungsten inert arc welding AZ31 magnesium alloy microstructure mechanical properties
下载PDF
Corrosion resistance and antibacterial activity of different zones in TA2 weldment by TIG welding 被引量:4
6
作者 Yan-Ping Zhu Chang-Yi Li Lian-Yun Zhang 《Rare Metals》 SCIE EI CAS CSCD 2020年第12期1449-1456,共8页
The corrosion resistance behavior of TA2 pure titanium processed by tungsten inert gas(TIG)welding was investigated in artificial saliva solution at 37℃.By metallographic examination,electrochemical measurement techn... The corrosion resistance behavior of TA2 pure titanium processed by tungsten inert gas(TIG)welding was investigated in artificial saliva solution at 37℃.By metallographic examination,electrochemical measurement technology,and electrochemical impedance spectroscopy(EIS),the corrosion resistance of the base metal(BM),heat-affected zone(HAZ),and weld metal(WM)were investigated.Metallographic examination experiments show that welding process would cause the growth of grain size.In addition,phase change happens in the HAZ and WM.The change of grain size and phase would influence the generation of the original passive film.The electrochemical tests show that the BM,HAZ,and WM are all equipped with good corrosion resistance.The welded joint shows a better corrosion resistance than the original TA2.It is shown that the BM with the lowest corrosion potential and the biggest corrosion current has a worse corrosion resistance than WM as well as HAZ.Silver(Ag)nanoparticles can be distributed on the WM zone of Ti uniformly.The WM zone of Ti with Ag coating considerably enhances the antibacterial activity of Ti implants. 展开更多
关键词 TITANIUM tungsten inert gas welding Corrosion resistance Artificial saliva solution Antibacterial activity
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部