热输入对钽铌合金焊缝组织和强度的影响

M. Bexiga , A. Tavares , F. Melo , A. Loureiro
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引用次数: 6

摘要

铌和钽材料的焊接目前是在真空或惰性气体室中进行的,这限制了要生产的设备的尺寸。本研究的目的是探讨在大气环境下对这些材料进行TIG焊接的方法,并分析热输入对焊缝性能的影响。结果表明,在大气环境下对这些材料进行TIG焊接是可能的,只要保证焊缝的表面和根部得到充分的保护。焊缝热输入的增加使两种材料的熔化区和热影响区组织变粗;还增加了熔化区的硬度和焊缝的抗拉强度,并且在热影响区没有明显的塑性损失。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effect of heat input on microstructure and strength of welds in tantalum and niobium alloys

Welding of niobium and tantalum materials is currently conducted in vacuum or inert gas chambers, which limits the size of the equipment to be produced. The objective of this study is to investigate the means to make TIG welding on these materials in atmospheric environment and analyse the effect of heat input on the properties of welds. It was found that it is possible to make TIG welds on these materials in atmospheric environment, provided that adequate protection is ensured on the face and root sides of welds. The increase of weld heat input coarsens the microstructure in melted and heat affected zones of both materials; increases also hardness in melted zones and tensile strength of welds, and there is not an obvious loss of ductility in heat affected zones.

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