1) welding preheating
焊接预热
1.
This paper has introduced the improving measures of welding preheating for 450 t large rotating wheel.
介绍了450 t大型转轮焊接预热技术的改进措施,在保证转轮整体加热的基础上取得了良好的效果,节约了大量的材料及能源费用。
3) preweld interval
焊接预热时间
4) preheated electric arc welding
预热电弧焊接
5) thermite welding
铝热焊接
1.
This paper introduces the problems existing in the coke car's track before transformation, makes theoretical analysis on the thermite welding, and expounds the social benefit and economic benefit of paving the vehicular track by using the thermite welding.
介绍了熄焦车轨道改造前存在的问题,对铝热焊接进行了理论分析,阐述了铝热焊接行车轨道的社会效益及经济效益。
2.
Because the thermite welding needs no electricity or gas and operates expediently, four kinds lash-up welding tools were designed and manufactured, which are self-propagating high-temperature synthesis (SHS) welding pot, SHS welding sleeve, portable shaft welding apparatus and adjustable shaft welding apparatus.
为此,利用铝热焊接无需电、气以及操作方便的特点,自行设计制作了自蔓延焊锅、自蔓延焊筒、便携式焊轴器和可调式焊轴器4种应急焊修工具,推动了铝热焊接技术的实用化进程。
补充资料:焊接温度场
焊接温度场
field of weld temperature
hanJ旧wenduchang焊接温度场(field of weld temperature)指金属焊接过程中的某一瞬间,金属怀接接头中各点的温度分布状态。通常用等温线或等温面来表示。所谓等温线或等温面就是把焊件上瞬时温度相同的各点连接在一起成为一条线或一个面。各等温线或面不能彼此相交,而它们彼此之间存在着温度差。热能集中则温度场的范围小。影响温度场的因素很多,其中主要有:(l)热源的性质和焊接规范;(2)被焊金属的热物理性质;(3)焊件的形态;(4)热源的作用时间和移动速度。焊接温度场决定了焊接应力场和应变场,它还与冶金、结晶、相变过程有不可分割的联系,使之成为影响焊接质量和生产率以及金属焊接性的主要因素之 (李维茜)
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参考词条