焊接

These jigs are essential to ensure the best quality welds and the minimum of distortion during the welding process.

这些夹具是必不可少的，以确保最优质的焊接变形和焊接过程中最低。

Observation of transmission electron microscope reveals that the f＇me structure of CGHAZ and IRCGHAZ of both in- service welding and routine is ferrite laths and the second phase particles that distribute on or between ferrite laths.

透射电镜下，在役焊接和常规焊接的粗晶区与临界粗晶区的主要形貌都是铁素体板条和分布在板条之间或板条基体上的岛状物，铁素体板条的亚结构都是高密度位错。

An ultra-high strength, weldable, low alloy steel with excellent cryogenic temperature toughness in the base plate and in the heat affected zone when welded, having a tensile strength greater than 830 MPa (120 ksi) and a micro-laminate microstructure comprising austenite film layers and fine-grained martensite/lower bainite laths, is prepared by heating a steel slab comprising iron and specified weight percentages of some or all of the additives carbon, manganese, nickel, nitrogen, copper, chromium, molybdenum, silicon, niobium, vanadium, titanium, aluminum, and boron; reducing the slab to form plate in one or more passes in a temperature range in which austenite recrystallizes; finish rolling the plate in one or more passes in a temperature range below the austenite recrystallization temperature and above the Ar3 transformation temperature; quenching the finish rolled plate to a suitable Quench Stop Temperature; stopping the quenching; and either, for a period of time, holding the plate substantially isothermally at the QST or slow-cooling the plate before air cooling, or simply air cooling the plate to ambient temperature.

在基体板以及焊接时的热影响区处的低温韧性优异的超高强度、可焊接、低合金钢具有高于830MPa（120ksi）的抗拉强度，并且具有包含奥氏体薄膜层和细晶粒的马氏体／下贝氏体板条的显微层状组织，所述钢的制备过程为：加热含有铁以及特定重量百分比的添加元素的钢坯，所述添加元素为碳，锰，镍，氮，铜，铬，钼，硅，铌，钒，钛，铝，以及硼中的一些或全部；在奥氏体可发生再结晶的温度范围内，采用一个或多个道次，将所述钢坯轧制成板材；在低于奥氏体再结晶温度但高于Ar 3 转变点的温度下，采用一个或多个道次对所述板材进行终轧；将所述终轧板材淬火至一适当淬火终止温度；停止所述淬火；或者在空冷前在QST点基本等温保持所述板材一段时间，或者对所述板材进行缓慢冷却，或者只是简单地将所述板材空冷至室温。

Mechanical vibration welding is a new weldin g technology whichwas deve loped on the basis of vibration-stress-relief-technology.

机械振动焊接是在振动调整残余应力技术基础上发展起来的一项焊接新技术。

An investigation in details is conducted on factor which influence on the peened affection.

在各种焊接结构实际制造和使用过程中常有一些问题，可能对超声冲击法提高焊接接头疲劳强度的效果有较大的影响。

We find that the proportion of the contribution of the three factors on the fatigue strength improvement of the peened joints depends on the base metal static strength.

结果表明：超声冲击处理提高焊接接头疲劳强度的硬化，改善焊趾几何外形和在焊趾区形成表面压应力三者贡献的大小，与被处理焊接接头的母材静强度有一定的相关性。

Results show: 1 In the range of long life (N≥2× 10〓 cycles), the design class of peened joints is FAT160; 2 In the range of middle life (2×10〓≥N≥5×10〓 cycles), the design class of peened joints is equal to or higher than FAT125 which is the highest class recommended by ⅡW.

分析了超声冲击处理焊接接头与原始焊接接头在疲劳设计中的不同特点。给出Q235B与16Mn钢对接接头和十字接头经超声冲击处理后的参考FAT值。

It can improve the pipelines welding quality and production efficiency, and it has widely application prospect.

能有效改善管道焊接质量和提高焊接生产率，具有重要的工程应用前景。

Based on virtual manufacture,principle and feature of virtual refitting design were presented and implementation method and operation mode of virtual refitting system were put forward.

基于虚拟制造技术讨论了设备虚拟改装的原理和特点，提出虚拟改装系统的实现方法和运行模式，讨论了老旧机床本体及新附加装置的建模方法，并在工业用非重复充装焊接钢瓶生产线建设中，进行了焊接专机的改装实践。

The results of experiments indicate that with short-circuiting transfer mode, sound weld can be achieved in high-speed welding .

试验结果表明，采用短路过渡焊接可以有效地防止驼峰焊道的产生，提高焊接速度。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！