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等离子弧焊接小孔形状和穿孔过程的数值分析霍玉双1,2,武传松1,陈茂爱2(1.山东省济南市山东大学材料液固结构演变与加工教育部重点实验室2.山东省济南市山东建筑大学材料科学与工程学院)摘 要:根据小孔壁面上的力学平衡条件,建立了穿孔等离子弧焊(PAW)的小孔模型.利用该模型,对6mm厚不锈钢板PAW准稳态小孔的形成过程进行了数值计算,得到了不同工艺参数下准稳态小孔的形状和尺寸.根据达到准稳态时小孔壁面的受力状态,对PAW过程中小孔从盲孔到穿孔的转变机制进行了探讨,分析计算了小孔壁面上各区域的作用力大小.随着焊接......
description 2.1 Construction of control formula Fig.1 shows the schematic diagram of TIG welding process with a locomotive arc (unfilled with welding wire). As shown in Fig.1, the arc moves along... of tungsten inert gas(TIG), a model of non-steady three-dimensional temperature field for red copper’s TIG welding with a locomotive arc was established. The temperature field of welding pool was calculated......
等离子弧定点焊熔池穿孔过程的数值分析王小杰1,武传松1,陈茂爱1(1.山东省济南市山东大学材料液固结构演变与加工教育部重点实验室)摘 要:利用Level-Set理论与方法追踪小孔界面的演变过程,建立了等离子弧定点焊熔池与小孔的数学模型,对不锈钢试件等离子弧定点焊熔池的穿孔过程进行数值模拟,获得了多种工艺条件下熔池与小孔形状和尺寸的动态变化数据.结果表明,6 mm厚度不锈钢试件等离子弧定点焊,当焊接电流为170和180 A时,分别在2.7和2.5 s形成贯穿工件厚度的小孔;等离子弧定点焊过程中,小孔断面的形状由开......
Microstructure and Wear Performance of High Volume Fraction Carbide M7C3 Reinforced Fe-based Composite Coating Fabricated by Plasma Transferred Arc Welding袁有录1,2,李铸国21. School of Materials Science... arc(PTA) welding was studied. The results showed that the volume fraction of carbide M7C3 was more than sixty percent, and the relative wear resistance of the coating tested on a block-on-ring dry......
compositions of the filler material are shown in Table 1. In underwater wet FCAW, the welding parameters, which affect the bead geometry, are welding current I, arc voltage U, travel speed v, contact...Trans. Nonferrous Met. Soc. China 23(2013) 1977-1984 Sensitivity model for prediction of bead geometry in underwater wet flux cored arc welding Yong-hua SHI, Ze-pei ZHENG, Jin HUANG School......
Enhanced interface strength in steel-nickel bimetallic component fabricated using wire arc additive manufacturing with interweaving deposition strategyBintao Wu1,2,Zhijun Qiu2,Zengxi Pan2,Kristin.... Here, wire arc additive manufacturing(WAAM)process was used to fabricate a steel-nickel structural component, whose average tensile strength of 634 MPa significantly exceeded that of feedstock materials......
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welded using bypass-current double-sided arc welding with Al–Si filler wire to investigate the effect of Al–Si intermetallic compounds on the microstructure, microhardness and corrosion behavior...Joint Characteristics and Corrosion Properties of Bypass-Current Double-Sided Arc-Welded Aluminum 6061 Alloy with Al–Si Filler MetalYu-Gang Miao,Ben-Shun Zhang,Bin-Tao Wu,Xiao-Xiao Wang,Guang-Yu Chen......
-Dynamic(MHD)theory,a united three-dimensional(3D)transient numerical model is developed to investigate the dynamic behaviors of arc plasma for a magnesium alloy AZ61A gas tungsten arc welding(GTAW... of interface between welding arc and workpiece.The distributions of electric potential,current density,magnetic flux density,electromagnetic force,velocity,temperature,and pressure of the arc plasma......
includes arc generation and evolution, up-and-down movement of welding wire, droplet formation and dipping into the weld pool, weld pool dynamics, zinc evaporation and zinc vapor diffusion in the arc... pressure near the steel surface, which always results in the instable metal transfer and welding process. Key words: cold metal transfer; arc plasma; heat and mass transfer; numerical simulation 冷金属过渡技术(CMT......