焊接

A non-singular single integral mathematical model is adopted to calculate the external intermittent and alternative longitudinal magnetic field acquired by single axisymmetrical and cylindrical hollow coil t which is coaxial to electrode and excitated by a revisable pulsed current of square wave t in austenitic stainless steel GTA welding.

针对奥氏体不锈钢外加纵向磁场的气体保护钨极电弧焊接时，与电极同轴的单个轴对称空心圆柱线圈在双向脉冲矩形励磁电流作用下产生的间歇交变纵向磁场，采用无暇点单积分磁场的数学模型，对＊TAW焊接外加间歇交变纵向磁场进行了数值计算，该方法具有模型简单、计算速度快和精度高等优点并讨论了该间隙交变纵向磁场的分布、磁场的均匀性及其纵向分量与径向分量的比率等规律及其对焊接行为的影响，认为横磁分量将削弱GTAW外加纵向磁场的有利作用，影响磁控电弧的焊接质量

Based on the application of gas pressure welding in multilayer structure, the authors sum up construction experience, including selection of weld parameter, con- sideration needed in operation and test methods of weld points, and point out the direction of far- ther improvemrnt.

结合气压焊接工艺在多层框架结构上的应用，总结了施工实践中的经验，包括焊接参数的选择、操作注意事项、焊接接头的质量检验及今后在应用中需不断充实完善的新课题等。

From the USA and Thailand has one of cola companies TECHALLOY of nickel-based welding materials, the United States Oxford Oxford special welding consumables company, USA Miller Electric Company Miller Welding Power Supply, Germany Siegfried Siegmund Mans and Germany Forster Foster's three-dimensional flexible welding table, as well as Germany's Express AMF fixture and hydraulic clamping system.

其中有来自美国泰可乐公司TECHALLOY的镍基焊接材料，美国牛津公司Oxford的特殊焊材，美国米勒电器公司Miller的焊接电源，德国西格芒Siegmund公司和德国福斯特FORSTER公司的三维柔性焊接工作台，以及德国 AMF 公司的快速夹具和液压夹紧系统。

Energy deposition at the interface of the particles caused by micro-explosive welding in explosive consolidation of metal powders is analyzed by symmetrical impaction model of uncompressible liquid. Two-dimensional equation of energy in the flow field of explosive welding is deduced and solved by finite difference method. Then the distribution of the temperature in the flow field is calculated on the basis of considering the adiabatic compression.

摘 要：以不可压缩理想流体对称碰撞模型对金属粉末爆炸烧结中由微爆炸焊接引起的颗粒界面附近沉积的能量进行了分析，在考虑热传导效应的基础上推导出了焊接流场中二维形式的能量方程并用有限差分法对其进行了求解，在考虑冲击绝热压缩贡献的基础上计算出了焊接流场中的温度分布。

The results show that mechanical heterogeneity has great influence on the J-integral of welded joint containing transverse crack. The J-integral on the path cross the interface between welded joint and base metal is higher than the J-integral on the paths in the weld metal for undermatched joint,while the J-integral on the path cross the interface between weld metal and base metal is lower than the J-integral on the paths in the weld metal for overmatched joint. Moreover,the difference of J-integral values increases with the increasing of the load and strength mismatching difference and the path-enclosed length of interface between weld metal and base metal.

计算结果表明：力学不均匀性对含横向裂纹焊接接头的J积分有重要影响，低匹配焊接接头中积分路径穿越焊缝与母材界面的J积分值高于积分路径在焊缝内的J积分值，高匹配焊接接头中积分路径穿越焊缝与母材界面的J积分值低于积分路径在焊缝内的J积分值；载荷越大，焊缝与母材的强度差别越大；积分路径中包含的焊缝与母材界面长度越大，J积分的差值越大。

The CO_2 short circuiting transfer welding is a non-linear and time-variant process , so the optimization of its welding parameters is a focus in the field of welding.

由于CO2短路过渡焊接过程是一个非线性、时变的过程，所以对其焊接工艺参数的优化研究一直是焊接界的热点。

All welding of stair stringer miters, closure plates, extension pieces, and similar welding applications shall be continuous welds and shall be ground smooth.

所有的焊接：包括楼梯梁的斜截面、封板、内外螺纹管接头、以及其他类似的焊接，都要进行连续焊接并要磨光处理。

The result shows that the equalmatching characteristic of 10Ni5CrMoV steel welded joint is prominent.The probability of equalmatching is 48.11%,as well as,that of undermatching and overmatching are 47.55% and 4.34%,respectively.The mean-value of strength matching coefficient is nearly higher than its lower ...

计算结果表明，10N i5CrMoV钢焊接接头的等强匹配特征明显，等强匹配概率为48.11%，低强失配和超强失配概率分别为47.55%和4.34%；强度匹配系数均值偏下限，为0.955；由于母材强度数据的标准差比焊缝要大，约为1.54倍，从而使得强度匹配系数离散度较大；此外，焊接接头强度匹配系数小于0.86的概率为2.96%，可能会导致焊接接头产生冷裂纹。

Test results show 1 the fatigue strength of peened joints under overloading, in spite of lower than the fatigue strength of the non-overloading peened joints, is still greatly higher than the fatigue strength of as-welded joints; 2 In the range of lower stress level and longer life, ultrasonic peening method exhibit better results than TIG dressing; 3 Fatigue strength of the welded joints with defects (such as undercut at the weld toe) can also be improved greatly after peening treatment.

结果表明，超声冲击处理过的焊接接头经过载后疲劳性能有所下降，但与原始焊态相比提高疲劳强度、延长疲劳寿命的效果仍然十分显著；在低中应力水平、中长寿命区域，使用超声冲击法提高焊接接头疲劳强度比TIG熔修法效果更好；超声冲击处理后，含咬边等缺陷的焊接接头，疲劳强度同样有较大的提高。

In the condition of big practical extruded 6005A alloy welded joint, the softing degree of mentioned above soft zone obviously decreases, attributed to that there is a reinforce rib which have obvious heat scatting action, and then decreases the temperature increasing during welding.

对进口的6005A大型多孔铝型材焊接接头进行分析，发现焊接接头上软化区硬度降低的程度明显较小，这是由于实际的多孔型材在该部位设置有加强筋，加强筋有显著的散热作用，降低了焊接过程中该部位的温升。

Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.

Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。

I am coming just now,' and went on perfuming himself with Hunut, then he came and sat.

我来只是现在，'歼灭战perfuming自己与胡努特，那麼，他来到和SAT 。