Tungsten and steel connecting method

The invention provides a tungsten and steel connecting method, and belongs to the technical field of dissimilar material connection. According to the method, the FeCoCrNi high-entropy alloy is adopted as the middle layer for diffusion connection of tungsten and steel, and due to the fact that the high-entropy alloy has the excellent plastic deformation capacity (the compression deformation amount exceeds 80%) and the low yield strength (167 MPa), residual stress generated by mismatching of the thermal expansion coefficients of tungsten and steel can be effectively relieved; and meanwhile, elements such as Fe, Ni and Cr in the steel can be completely dissolved in the steel through the specific high-entropy effect, brittle compounds are prevented from being generated between the middle layer and base metal interfaces on the two sides, and the shear strength of a connector is effectively improved. Experimental results show that the shear strength of a connector obtained through the tungsten and steel connecting