钨合金与钢焊接研究进展

Research progress on welding of tungsten alloy with steel

文中从钨与钢的焊接性出发,对钨与钢焊接领域的研究现状进行了总结,包括熔焊、扩散焊、钎焊等焊接技术,对钨与钢焊接研究的重点内容和发展趋势进行了讨论。在钎焊过程中通过低熔点非晶态钎料与局部加热的方式,避免整体加热带来的晶粒粗化等不利影响,在钎焊与扩散焊过程中通过合适的中间层,缓解了残余应力,避免了金属间化合物与金属碳化物的产生。在熔焊过程中通过调整能量分布,形成有效熔池,获得良好成形的接头。水下爆炸焊、化学/物理气相沉积、等离子喷涂、磁控溅射等技术能连接的钨厚度低,同时还存在孔隙率大,残余应力大,连接强度低的问题。

Based on the weldability of tungsten and steel,the current research status of fusion welding,diffusion welding,brazing,and other welding technologies applied to tungsten and steel welding was summarized in this article,the key content and the trends of tungsten and steel welding research were discussed.In the brazing process,the low melting point amorphous solder and local heating were used to avoid the adverse effects of grain coarsening caused by the overall high-temperature heating.In the brazing and diffusion welding process,a suitable intermediate layer was used to relieve the residual stress and avoid the generation of intermetallic compounds and metal carbides.In the welding process,by adjusting the energy distribution,the effective molten pool was formed and a well-formed joint was obtained.Underwater explosive welding,chemical/physical vapor deposition,plasma spraying,magnetron sputtering,and other technologies could be connected with the low thickness of tungsten,as well as problems of large porosity,high residual stress and low connection strength.