Jun ZHANG
材料科学技术（英）
An empirical formula for composition demixing analysis in cathodic arc ion plating using alloy target is established based on the concepts of average charged state and relative demixing parameter. The level of composition demixing effect is presented by demixing degree of one element. For binary constituent alloy target, the composition change trend in coating is discussed and the limit of demixing degree for each element is determined. The content of one element with higher average charged state gets larger in coating than in alloy target, at meantime, the content of one element with lower average charged state gets less. For each one of the two constituents, the less the atom percent in alloy target, the larger the difference of its contents between the coating and the target. For triple constituent alloy target, the content change of one element with moderate average charged state is discussed in detail. Its content in coating getting larger or less is determined by the combination result of the contents of the other two elements in alloy target. For a given content of the element with moderate average charged state in triple alloy target, the content deviation level of that element from coating to alloy target will be not larger than that using binary alloy target containing only that element and one of the two others. According to the wanted coating composition, the composition design of alloy target is easily deduced from the formula.
关键词:
Cathodic arc ion plating
,
arc
,
ion
,
plating
,
alloy
,
coating
,
a
B.S. Sung
,
I.S. Kim
金属学报(英文版)
Recently, there has been a rapid development in computer technology, which has in turn led to develop the fully robotic welding system using artificial intelligence (AI) technology. However, the robotic welding system has not been achieved due to difficulties of the mathematical model and sensor technologies. The possibilities of the fuzzy regression method to predict the bead geometry, such as bead width, bead height, bead penetration and bead area in the robotic GMA (gas metal arc) welding process is presented. The approach, a well-known method to deal with the problems with a high degree of fuzziness, is used to build the relationship between four process variables and the four quality characteristics, respectively. Using these models, the proper prediction of the process variables for obtaining the optimal bead geometry can be determined.
关键词:
robotic arc welding
,
arc
,
welding
,
Bead
,
geometry
,
Fuzzy
朱胜
,
王启伟
,
殷凤良
,
梁媛嫒
,
王晓明
,
李显鹏
材料热处理学报
为了研究交变纵向磁场作用下MIG焊接电弧的物理特性,提高焊接质量,分析了交变纵向磁场作用下电弧带电粒子的受力情况和运动状态,并利用高速摄像手段研究了交变纵向磁场对电弧形态的影响。结果表明,无外加交变纵向磁场时,自由电弧稳定燃烧,电弧轴线与焊丝轴线相重合;当加入交变纵向磁场时,电弧围绕焊丝轴线做逆时针和顺时针交替变化的旋转运动,电弧轴线偏离焊丝轴线;随着励磁电流的增加,电弧的旋转半径增大,电弧偏离焊丝轴线的角度增大,电弧烁亮区域面积减小;当励磁电流为30 A时,电弧的最大偏转角度为45°,此时电弧燃烧变得不稳定,甚至息弧,焊接过程不稳定。
关键词:
纵向磁场
,
MIG焊
,
电弧
,
高速摄像
菅晓霞
,
武传松
金属学报
doi:10.11900/0412.1961.2016.00008
建立了包含Fe蒸气影响的等离子弧焊接一体化模型, 其计算区域包含W极、等离子弧、熔池和小孔, 通过在整个区域使用统一的控制方程实现各区域的自适应耦合. 使用黏性近似法处理Fe蒸气的扩散系数. 模拟了焊接电流分别为150, 170和190A时, 3种工艺条件下的穿孔过程中, Fe蒸气在阳极液态金属表面的产生、扩散及其在等离子弧中的聚集过程. 对比分析了Fe蒸气对等离子弧的温度场、电场和熔池形态的实时影响. 结果表明, Fe蒸气的产生决定于液态熔池温度分布. 在等离子流力的作用下, Fe蒸气聚集在等离子弧的边缘区域, 导致该区域的辐射损失增加、电流密度降低. 而弧柱中心区域受Fe蒸气的影响较小. 与不考虑Fe蒸气影响的等离子弧焊接模型相比, 考虑Fe蒸气影响时计算出的焊缝尺寸与实验测试值更接近.
关键词:
等离子弧焊接,
,
Fe蒸气,
,
熔池,
,
小孔,
,
等离子弧,
,
数值分析
路浩
,
苏陆军
兵器材料科学与工程
针对焊接新技术、新工艺研发,焊接质量过程分析的需要,研发智能化焊接装备及工艺评价系统.系统主要由焊接电流电压高速采集和分析系统、焊接过程高速摄像系统、机器人试验台架等部分组成.系统能够完成焊接电弧的高速摄像、电流电压信号的高速精确同步采集和分析,是开展新型焊接技术、焊接过程质量控制研究、焊接设备分析评价和焊接材料工艺性试验等相关研究及评价工作的基础装备.
关键词:
电弧
,
焊接电弧
,
电流电压
,
熔滴过渡
