查询词典 tack welding

If a joint is in the cable, the temperature of the tinning welding joint is mot more than 120℃,compressing joint mot more than 150℃ and electro-welding or gas-welding joint not more than 250℃.

2.2.2 短路时（最长持续时间不超过5秒），导体最高温度不超过250℃，电缆线路中间有接头时，锡焊接头不超过120℃，压接接头不超过150℃，电焊或气焊接头不超过250℃。

After the welding finishes, further reduce the welding stress by adopting partial high temperature annealing as follows, heat the welding-repaired seam and steel plate around up to 600℃ with tracklayer heating device, and then cover it with mountain leather to hold temperature, cooling down slowly.

焊接完成后采用局部高温退火的办法进一步消除应力。具体做法是：用履带式加热装置将焊补焊缝及周边钢板加热到600℃，用石棉覆盖保温，缓慢冷却。

It was found recently that magnetic arc blow, inherently happens with such kind of welding process, particularly in deep groove welding of the first layer, can produce various kinds of weld defects, interfere the welding operation and make the arc length control system to work unproperly.

近年来在MIG焊研究中发现电弧磁偏吹现象严重，特别是坡口对接封底焊，会造成多种焊缝缺陷，甚至无法进行焊接，还会造成弧长闭环控制系统混乱。

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。

Others, parts on Kelly bar shouldn't be changed or demounted at random; welding shouldn't be done on the part which did not weld formerly; maintenance should be guided by manufacturer, it is prohibited to weld the key side in principle, welding should be done on three keys at one time, indexing is ensured by grinding after welding, internal keys should be grinded of its full-length to ensure indexing.

其它，钻杆上的制件不要随意拆换或卸掉；不要在原来不焊接的部位自作主张焊接；维修钻杆要有钻杆生产厂家指导，原则上不允许对键侧进行焊补，焊补要三键同时进行，焊补后修磨保证分度，内键要通长焊补修磨，保证分度。

The effect of welding current on pressed depth is above that of welding press and welding electrifying time.

焊接电流对压入深度的影响明显大于电极压力和焊接通电时间。

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。

The production practice proves that this welding device has acheived good effect in the production of YSP 15 liquidized petroleum steel bottle and it is a general and low cost welding device for automatical welding production of liquidized petroleum steel bottle valve base.

介绍了 YSP-15型钢瓶瓶阀座自动焊接装置的结构、组成、工作原理及设计的主要特点。

It has function of high performance DC pules TIG welding, DC TIG welding and DC manual welding, is a kind of applied machine.

具有高性能直流脉冲TIG焊、直流TIG焊功能，又可直流手弧焊是经济实用性机型

This paper introduces the difference between butt-welding and lapping-welding,states the performance advantages of butt-welding aluminum-plastic reunites tube.

介绍了搭接焊铝塑管和对接焊铝塑管的区别及对接铝塑管的性能优势。

We got alerted a couple of times while we were down south that HETs were on the way to bring us back up north because things were going to go hot again, but it was just rumors.

南下的途中我们不只一次得到警告说重型装备运输车将拉着我们重新北上，因为局势正在变得重新紧张起来，但这只是谣传。

It's the one where they find the ghost in the salt mine.

这一集是演他们在盐矿找到鬼