焊接的

It was founded that the hardness distribution is approximately symmetrical to the center of welding line , the weakest zone of the whole joint is about 10mm from the center of the welding line . The HAZ of the welding line has an intenerate zone. the center of the welding line presents a typical dendritic casting structure.

结果表明：焊接接头的硬度以焊缝中心线为对称轴呈近似对称分布，焊接接头的最薄弱环节位于距焊缝中心约10mm处，焊接接头的热影响区内存在一个软化区。

The defomation control on the installation welding of the lambdoidal strobe of three gorges permanent ship-gate is an important constituent part of welding quality control, which is an important mark to the success of welding quality control.

三峡永久船闸人字门安装的焊接变形控制是焊接质量控制的重要组成部分，是焊接质量控制成功与否的重要标志。

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。

In electronic engineering, we usually have to bond a micro-strip board to a metalcarrier in order to provide proper stiffness, thermal conductivity and electrical conductivity, thus to make general handling,solder stencilling, pick and place of components be easier, and prevent the warping or distortion of the board during soldering.

林伟成，微带板与金属载体间的大面积焊接及胶接方法工程中常常需要把微带板和金属载体焊接或胶接起来，以获得合适的刚性、电导率和热导率，从而使丝网印刷、元器件贴装等工艺过程变得更加容易。并防止焊接过程中微带板的翘曲和变形。

At the same time, the characteristics of the microstructures of the laser welds and HAZ were analyzed.

对于不锈钢的激光焊接，发现在相同条件下，用YAG激光焊接，得到的焊缝熔深比用CO〓激光焊接时的大10％-30％，宽度值则小10％-20％。

The reasons of welding distortion for the bottom plate of large sedimentation cupboard is analyzed.

对大型沉降槽底板焊接变形的原因进行了分析，并提出了合理的安装和焊接顺序，有效地控制了槽底的焊接变形。

Measures of improving for low temperature toughness by selecting the welding materials and strictly controlling the welding process for welded joints of low temperature low-alloy steel, nickel alloy steel and chrome-nickel austenitic stainless steel for low temperature pressure vessels were summed up.

为了改善工作于低温环境的压力容器用低合金低温钢、镍合金钢和铬镍奥氏体不锈钢的焊接接头低温韧性，而采取改进焊接材料、严格控制焊接工艺的措施。

After verification of FEM, 45 species of 15 series are computed. The major parameters including slippage coefficients, pretensions forces, dimensions of angles, arrangement of bolts, connection method among angle, beam web, column flange, and so on are studied. Some important conclusions are drawn.

主要研究了摩擦系数、螺栓预拉力、螺栓线到与柱连接角钢肢背的距离、螺栓直径及级别、梁长、螺栓排列布置、梁高、柱翼缘厚度、角钢厚度、角钢长度、梁腹板只与角钢肢尖相焊接、钢材强度、角钢与梁柱均栓接、角钢与柱焊接与梁栓接、角钢与梁柱均焊接等参数对腹板双角钢梁柱连接滞回性能的影响，得出了一系列重要的结论。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。