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Air-excluding spot-welding method for making heat-exchange grid

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专利汇可以提供Air-excluding spot-welding method for making heat-exchange grid专利检索,专利查询,专利分析的服务。并且A method for spot welding Zircalloy straps in open air to form a heat-exchange grid for holding a plurality of rod-like elements against lateral displacement. Contiguous areas of the straps are clamped between spot-welding electrodes and immediately thereafter the clamped areas are sprayed with a non-viscous volatile liquid, preferably a pure organic compound free of sulfur, fluorine, chlorine and iodine, such as acetone or ethanol. Heated by the welding current, the liquid volatilizes to expell air, thus preventing weakening of the weld by absorbed nitrogen or oxygen.,下面是Air-excluding spot-welding method for making heat-exchange grid专利的具体信息内容。

1. A method for welding in the open air a spacer grid for holding a plurality of roD-like elements against lateral displacement comprising providing a plurality of Zircaloy straps and welding said straps with spot welds in the normal way to each other in the form of a grid by clamping the straps together under electrode pressure, immediately thereafter spraying the weld points with a thin-flowing, non-viscous volatile liquid which is a pure organic compound free of sulfur, fluorine chlorine and iodine, such as acetone or ethanol, whereby the rapid evaporation of the volatile liquid expelling air from the welding prevents the deleterious effects of nitrogen or oxygen absorption on the spotwelding tightness from occurring.
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