Microstructure and properties of honeycomb brazed interface for GH3536 alloy

The study on GH3536 superalloy was carried out to provide a high-strength brazing process for small core grid cutting thin-walled superalloy honeycomb. GH3536 honeycomb with inner tangent circle diameter of 0.8 mm and honeycomb wall thickness of 0.05 mm was adopted. BNi2 adhesive brazing filler metal was used to optimize amount of brazing filler metal and analyze microstructure of brazed honeycomb interface corresponding to different amount of brazing filler metal. Tensile properties, compressive properties and bending strength of GH3536 honeycomb component were tested to evaluate its basic mechanical properties. The result showed that welding rate of honeycomb structure reached 99.5%. Brazed honeycomb interface had fine grains, uniform microstructure and no brazing seam corrosion. GH3536 honeycomb component had excellent strength and toughness, and plane tensile strength reached 50 MPa.