焊的

In addition, in case of emergency can be acetylene torch on the pull down hose.

此外，在紧急情况下可将焊炬上的乙炔胶管拔下来。

I used a oxygen acetylene brazing torch set on the soft side.

我用一氧气乙炔焊炬定于软的一面。

Simulation and experiments have been m ade to show that the method is effective.

仿真和实验测试结果证明了其正确性，为弧焊逆变器研究和设计提供了有效手段，并可推广到其他类型的焊接电源。

With IGBT inverter welding machine-licensing its leading technology, high stability, reliability and excellent energy-saving performance at home in the welding industry has a good reputation and greater influence, widely used in China's missile and delivery Welding on the rocket, used in China's container production line; Isuzu car used in the production line; Shell 800,000 applications in Dayton ethylene project construction projects; applications installed in thermal power Engineering; application in Guangzhou Wenchong Shipyard production line… Han ID the company will take the U.S. electrical and Guangzhou-with the support, the United States will be the most advanced welding technology with China's most advanced welding technology organic integration, using "with sincerity" Business as a production base, production of international standards of cost-effective leading welding equipment.

同诚牌IGBT逆变焊机因其领先的技术，高稳定、可靠性及优异的节电性能在国内焊机行业中拥有良好的声誉和较大的影响力，广泛应用在中国的导弹和运载火箭的焊接上，用在中国集装箱集团的生产线上；应用在五十铃汽车的生产线上；应用在壳牌八十万顿乙烯工程建设项目上；应用在火电安装工程；应用在广州文冲船厂生产线上…瀚金公司将以美国ID电气和广州同诚为依托，将美国最先进的焊接技术与中国最先进的焊接技术有机融合，利用"同诚"等企业作为产品生产基地，生产具有国际领先水平的高性价比焊接设备。

The formula was established about calculating design parameters and technological parameters of ideal strip and bent strip in the period of forming. The thesis presented how to calculate the deformed area length and contact are radius of contact deforming between two elastic bodies on condition of the friction. The calculating formula of pinch force about plate-strip pinch mill was given and the results were analyzed that friction coefficient and radius of pinch rolls are very important for determining pinch force. Moreover, the rule of deforming and stress distribution of different 〓 ratio were gained on condition that the deforming was considered to be non-uniform distribution in the gap. The differential equations were got that calculate the displacements of large deflection of elastic cantilever rectangle plate with fixed end and the formula of the Finite Strip Method was conducted to study the regularity of mid-plane displacements, deformation and stresses for elastic-plastic large deflection bend of cantilever parallelogram plate with fixed or slidable end by integrating Prandtl-Reuss equation.

建立了一套完整的设计参数计算公式和在成型过程中理想带钢或具有月牙弯带钢的工艺参数的调整公式；在考虑摩擦力的条件下，对两弹性体接触变形过程中的接触变形区长度和接触弧半径用位移解法进行了研究，推导了板带递送机的递送力计算公式，从而得知在递送机设计过程中，应选择适当摩擦系数和辊身直径；另外，还从辊缝内带钢实际变形出发，分析了对于不同的〓值，带钢的变形规律及应力分布状况；建立了固定端悬臂矩形板弹性大挠度弯曲变形的控制方程，并且在对Prandtl-Reuss方程的积分处理的基础上，导出了固定端和滑动端悬臂平行四边形薄板的弹塑性大挠度的中面伸展位移、变形和应力的有限条元法公式，编写了Fortran语言计算程序，在各种参数条件下，对螺旋焊管成型过程变形规律进行了全面的分析研究，从而为螺旋焊管的生产和进一步的改进提供了理论依据。

This welding wire not only has the inherent properties of metal powder-cored wire, such as with better welding quality, without slag, highly efficiency and conveniently adjusting the alloying elements etc., but also has the advantage of low hardness in as-welded (less than HRC45), good machinability, high hardness in as-aged (more than HRC55) and better wear resistance with customary working procedure on making or repairing equipments such as rollers when reasonable designing the alloys content. The author adequately makes use of the high-tempering in the required stress relieving working procedure. During this working procedure, which causes the hardness of overlaying metal increased by the reason of austenite changes into tempered martensite and more chiefly what is the precipitation of a lot of carbide by secondary hardening simultaneously. This wire can solve the hard rolled problems of some solid wires with higher alloys while it can get over the conflict of existing overlaying materials what are always possesed high hardness with poor machinability or low hardness, good machinability with poor wear resistance. Further, it also can overcome the intenerating phenomena between welding beads and make the external hardness of overlaying metal uniform. Be sure it could be found important meaning in the overlaying of wear-resistant equipments, such as the precise roller.

该焊丝除了具有金属粉型药芯焊丝焊接质量好、无渣、高效率和合金成分可方便调节等固有的优点外，合理的设计粉芯中的合金成分，按通常工序制造与修复轧辊等设备，充分利用必需的消除应力工序的高温回火，堆焊层金属在奥氏体转变为回火马氏体的同时更主要是通过二次硬化析出了大量碳化物导致硬度增加，使得该焊丝还具有焊态硬度低(小于HRC45)、机加工性能好和时效态硬度高(大于HRC55)、耐磨性能好等优点，解决了某些高合金实芯焊丝轧制困难的问题，同时克服了现行堆焊材料硬度高、加工性能差或者硬度低、加工性能好、耐磨性差的矛盾，并能克服焊道之间的软化现象，使堆焊表面硬度较为均匀，对耐磨件，譬如精轧辊的堆焊具有重要意义。

In summary, this dissertation has made contribution to welding arc physic knowledge, discovered the respective spectrum signal features of each kind metal transfer mode, put forward an new approach for detecting droplet transfer in metal gas arc welding and provided enough theoretical and experimental guidance to the further research, meanwhile, it has also predicted the applications of arc spectrum information in other fields.

总之，本文的工作充实了焊接电弧物理和电弧光谱信息的知识内容，提出了熔化极气体保护焊熔滴过渡传感和检测的新手段，发现了各种熔滴过渡的多方面光谱特征，为熔化极气体保护焊熔滴过渡的研究和过程控制领域的开拓，为新型电弧传感器的开发，奠定了理论、实验和技术的基础，同时也预示了电弧光谱信息在其它领域应用的可能。

For wire bonding,we got methods to avoid low-k material layer crack and IMC crack by gold wire selection,capillary design optimization,and wire bonding process window study;Wire sweep issue was declined,after use reverse wire bonding technology to get low wire loop,define high wire loop and low wire loop between neighbour wires to reduce wire cross and split transfer course into several segments by different transfer speed to control mold flow;For molding and to different packages,as a physical method,add suitable presser during different cure process,it can reduce warpage value;As chemical methods,optimized component of molding compound or added flexiblier,it can decline thermal stress and warpage.

在引线键合方面，通过对不同纯度金线的选择、劈刀设计的优化、以及对引线压焊工艺窗口的研究，找到了可降低焊盘碎裂，金铝间化合物分层等问题的方法；通过使用反向压焊来控制线线弧高度和在邻近线间使用高(来源：A7aB4848C论文网www.abclunwen.com)低线弧来控制线弧以及模塑注塑速度细分化的方法，有效降低了冲线值；在模塑方面，针对不同封装形式，通过封装模块在烘烤过程中优化外加压力的时机，利用物理方法有效减低了翘曲；此外从化学角度出发，通过对模塑材料配方的优化以及添加应力释放剂，有效降低了封装内的热应力，减小了封装模块的翘曲。

It 's mainly used in steel tubes of high 's mainly used in steel tubes of high temperature superheaters with surface temperature temperature superheaters with surface temperature ≤625℃ and high ≤625℃ and high temperature reheaters with surface temperature temperature reheaters with surface temperature ≤650℃, and high ≤650℃, and high temperature headers and steam pipes with surface temperature temperature headers and steam pipes with surface temperature ≤600℃.

主要主要用于壁温≤625℃的高温过热器、壁温≤650℃的高温再热器钢管，以及壁温≤600℃的高温集箱温≤625℃的高温过热器、壁温≤650℃的高温再热器钢管，以及壁温≤600℃的高温集箱和蒸汽管道，国内外已逐步用该钢代替和蒸汽管道，国内外已逐步用该钢代替T22、F12、TP304L、TP347H等，但该钢焊接性能T22、F12、TP304L、TP347H等，但该钢焊接性能也比较差，容易产生焊接冷裂纹，所以同样要求有合适的预热温度和及时进行焊后回火处也比较差，容易产生焊接冷裂纹，所以同样要求有合适的预热温度和及时进行焊后回火处理。

It is clarified for the first time that the thermal fatigue failure of solder joint is actually a creep strain low cycle fatigue failure, and a physical model for creep fatigue crack propagation has been proposed. It was pointed out that creep strain increases in the high stress area ahead of the tip of thermal fatigue crack, results on one hand that the slide of crack tip increase, inactivation more serious and crack close length increases, the other hand, that intergranular crack exists, whose direction will affect the fatigue crack propagating.

本文首次阐明了焊点的热循环失效本质上是以焊点内循环蠕变为主要应变的低周疲劳失效，并在此基础上提出了蠕变疲劳裂纹扩展的物理模型，指出热循环裂纹前端的高应力区内，蠕变加剧，使裂纹前端滑移增加，裂纹钝化加剧，导致随后的裂纹闭合扩展长度增加；同时蠕变也使裂纹前端的高应力区出现晶间裂纹，蠕变沿晶裂纹对主裂纹扩展的影响取决于沿晶裂纹的连接方向。

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％。