Based on the characteristics of such weld pool images the algorithm of image processing is designed . The whole edge of weld pool is extracted . The parameters of weld pool surface geometry are obtained under different TIG welding conditions of butt joint .

根据对接TIG焊熔池图像特点，设计出图像处理算法，检测出了焊接熔池的整个边缘，得到了不同工艺条件下对接TIG， 焊 熔池 几何形状参数的实际尺寸。

Two layers of the A557 weld metal should be welded at least so that the better ability to resist IGSCC of the weld surface can be ensured .

补焊时，应至少补焊两层A557焊缝金属，以保证补 焊 焊缝 表面具有较好的抗应力腐蚀性能。

Penetrant flaw detection agent was used to detect the backing weld surface and the number of cracks was indicated by surface crack rate .

打底 焊缝 正面使用渗透探伤剂探伤，用表面裂纹率表示裂纹的数量。

Effect of Laser Power Supply Parameters on Weld Molding and Surface Quality

激光电源参数对 焊缝成型及 表面质量的影响

Test results showed that the optimized pickling process could clean oxide skin of weld surface in effect and improve pitting-resistance property greatly .

研究结果表明，采用本文中的酸洗工艺可以有效清除不锈钢 焊缝 表面的氧化皮，并改善其耐点蚀性能。

According to reflection law of light the depth of the weld pool is adjusted by using the slope as iterative variable . Finally an engineering solution of the weld pool surface is obtained .

利用光学反射定律，以斜率作为迭代变量不断调整熔池 表面深度，最终得到 熔池 表面 形貌的工程解。

The results show that : the weld surface of the aluminum alloy is slicked and the weld microstructure is refined obviously . At the same time the weld properties of aluminum alloy are enhanced with matched longitudinal magnetic field parameters .

试验结果表明：外加纵向磁场作用下， 焊缝 表面成形良好、焊缝组织得到明显细化，同时发现铝合金焊缝各项力学性能在适当匹配参数的纵向磁场作用下得到不同程度的提高。

A new algorithm is proposed for weld pool surface three-dimensional recovery .

提出了一种 熔池 表面 形貌三维恢复算法。

Analysis of Weld Pool Surface Velocity Singularity Induced by Marangoni Force

熔池 表面Marangoni力诱导的 表面速度奇异现象

Fluorescent magnetic Powder Inspection is one of the important methods for in : specting weld surface . It has following characters : direct-view clear displaying high sensitivity simple operation : less cost .

荧光磁粉探伤是 焊缝 表面探伤的重要方法之一，它具有观察直观，显示清晰，灵敏度高，操作简便，耗费低廉等特点。

This paper studied the effects of weld pool surface deformation on welding arc behavior characters basing on unified arc pool mathematical model .

在电弧与熔池统一模型的基础上研究 熔池上 表面变形对电弧行为特征的影响。

Deflection electron beam welding was brought out to improve the heat input of both side dissimilar metals and the appearance of weld surface . Cu was added into the joint to prevent the intermetallic compound Fe-Al from generating .

试验中引入偏束焊技术以解决异种金属连接时两侧 母 材热输入不均以及 焊缝 表面 成形的问题，并研究了通过在接头处添加Cu以解决 焊缝 区大量Fe-Al脆性金属间化合物生成的问题。

The blue-black diaphragm on the weld surface is the mixture of AlN and Al the new reinforcements in the middle of weld are AlN TiN and TiC .

得出 焊缝 表面的蓝黑色薄膜状物质为AlN和Al的混合物，焊缝中心新生相为AlN、TiN和TiC。

Using the commercial CCD camera the TIG weld pool surface image of butt joint is captured with high clearance and resolution by optimizing the optical parameters and adjusting the image-grabber parameters dynamically .

利用普通CCD摄像机，通过光学参数的优化和采集参数的动态调整，拍摄出了清晰度和分辨率都较高的对接TIG 焊 熔池 正面图像。

But current density and heat flux on deformed weld pool surface are not similar Gauss distribution .

而变形 熔池 表面的电流密度和热流密度分布则不再符合近似的高斯分布。

Increasing weld heat input and surface escaping coefficient of hydrogen can decrease hydrogen accumulation in the fusion zone of weld surface but it is not obviously sin weld root .

提高焊接线能量和增大氢的表面逸出系数可降低氢在 焊缝 表面熔合区的聚集，但对焊缝根部氢的聚集影响不大。

Moreover the dynamic behaviors of the weld pool surface and weld pool geometry such as the maximum deformation pool length and pool width under different levels of welding currents are analyzed numerically .

还计算了不同焊接电流条件下 熔池 表面的动态行为，如最大变形、熔池长度和宽度的变化等。

Effects of weld pool surface deformation on behavior characters of welding arc

熔池 表面变形对电弧行为特征的影响

Through analyze the quality of weld surface and weld section surface mechanical properties and micro-structure analysis the influence of welding process parameters and clearance on welding quality of three layer board welding was obtained .

通过 焊缝 表面成形质量分析，焊缝截面形貌分析，力学性能及金相组织分析，得出了焊接工艺参数及上下间隙对三层板的焊接质量影响规律。

By numerical simulation the interactions of welding process parameters GMAW weld pool surface deformation arc heat flux distribution weld pool geometry and temperature profiles are quantitatively analyzed .

通过数值模拟，定量分析了焊接工艺参数GMAW 熔池 表面变形电弧热流分布熔池形状及其温度场之间的相互影响。

A qualitative analysis of the variation of weld surface condition welding heat distribution and friction factor in the initial stage of friction welding of drill pipe is carried out .

对石油钻杆摩擦焊初始阶段 焊接 面状况、焊接热分布、摩擦系数等的变化作了定性分析。

Select 4f spatial filtering system under such circumstances clear weld pool surface deformed laser stripe images are captured .

选择4f空间滤波系统，在一定参数下拍摄到了比较清晰的 熔池 反射变形激光条纹图像。

The bad effects of uneven weld surface on the automatic ultrasonic inspection were summarized .

文中概述了超声自动检测过程中 工件 表面不平度的不利影响，重点分析了 焊缝 余 高对 检测结果的影响。

The calculated results of current density and heat flux on flat weld pool surface using model established in this paper are agreed with experiment .

用本模型计算出的平坦 熔池 表面电流密度和热流密度的分布与试验结果显示了很好的一致性。

The results shown that a deformation-free joint with good weld surface appearance can be obtained with suitable welding conditions for butt-joint and lap-joint of the dissimilar materials .

结果表明，当焊接工艺参数合适时，可以获得 表面成形良好、无变形的 铝 合金与钢的对接接头和搭接接头。

After using common tool when friction stir spot welding will leave a defect & Keyhole . Not only affects the weld surface appearance but also reduces the mechanical properties of weld .

但由于采用普通搅拌头进行搅拌摩擦点焊的一个最大缺陷就是会在焊后留下一个匙孔，不仅影响 焊缝 表面的美观，而且也降低了焊缝的力学性能。

The surface tension coefficient is a function of both temperature and composition . It is shown that the weld penetration and the aspect ratio are not only determined by the level of the surface-active element but also the temperature distribution on the weld pool surface .

表面张力温度系数是熔池 表面温度和活性元素硫含量的函数，表面张力不仅仅与硫含量有关，而且还与 熔池 表面温度关系密切。

Research on Sensitivity of Centerline Indentation and Solidification Cracking of Weld Surface at Stainless Steel Welded Pipe

不锈钢焊管 焊缝中心线凹陷及凝固 裂缝敏感性研究

It must be to do annealing treatment for eliminating strees and whole temper treatment after the welding . The weld and surface quality must be to achieve 2 class level .

焊后分别进行去应力退火和整体回火处理，使 焊 补 焊缝及 表面质量达到Ⅱ级。