A kind of activated diffusion bonding method of cemented carbide and steel
A cemented carbide and diffusion joining technology, applied in welding equipment, metal processing equipment, manufacturing tools, etc., can solve the problems of high vacuum degree, low joining efficiency, and poor performance of activated joining, so as to shorten the time of diffusion joining, Improve product quality and save costs
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Embodiment 1
[0026] The YG6X cemented carbide with a size of φ9×9mm is connected to No. 45 steel by active diffusion.
[0027] Firstly, the surface to be welded of YG6X cemented carbide and No. 45 steel is subjected to alkali washing, pickling, grinding and distilled water rinse in sequence to ensure that the smoothness of the surface to be welded is Ra≤3.2μm, and the cold air is dried for use; then, the cemented carbide and The steel surfaces to be welded are butt-jointed and assembled, and a layer of boron powder is brushed between the butt surfaces without a metal interlayer, and the overall connection is assembled; then, the overall connection is placed on the upper and lower pressure heads of the diffusion welding furnace In between, apply a pre-pressure of 0.5MPa, close the furnace door; open the diffusion welding furnace to vacuumize, and wait until the vacuum degree reaches 10 -1 Pa, fill the diffusion welding furnace with hydrogen, start heating when the pressure in the furnace re...
Embodiment 2
[0030] The YG15C cemented carbide with the size of φ12.5×9mm is connected with the No. 45 steel with the size of φ12.5×28mm by active diffusion.
[0031] Firstly, the surface to be welded of YG15C cemented carbide and No. 45 steel is subjected to alkali washing, pickling, grinding and distilled water rinse in sequence to ensure that the smoothness of the surface to be welded is Ra≤3.2μm, and the cold air is dried for use; then, the cemented carbide and The steel surfaces to be welded are butt-assembled, and a 100 μm thick Ni foil is laid between the butt surfaces, and the surface of the Ni foil is sprayed with a mixed powder of B and Li. The mass ratio of B powder and Li powder is 9:1, and the overall joint is assembled. ; Subsequently, place the integral connector between the upper and lower pressure heads of the diffusion welding furnace, apply a pre-pressure of 1.0 MPa, and close the furnace door; the diffusion welding furnace is turned on and vacuumed, and the vacuum degree...
Embodiment 3
[0034] Active diffusion bonding of YG11 cemented carbide with a size of φ14×10mm and Cr12MoV steel.
[0035] Firstly, the surfaces to be welded of YG11 cemented carbide and Cr12MoV steel were washed with alkali, pickled, polished and distilled water in order to ensure that the roughness Ra of the surfaces to be welded was 1.25 μm, and dried with cold air for later use; then, the cemented carbide and steel The faces to be welded are butted and assembled, and a 100 μm thick Cu foil is laid between the butted faces, and B is placed on both sides of the Cu foil. 2 o 3 Then, put the integral connector between the upper pressure head and the lower pressure head of the diffusion welding furnace, apply a pre-pressure of 1.0MPa, and close the furnace door; the diffusion welding furnace is turned on and vacuumed, and the vacuum degree reach 10 -1 Pa, fill CH into the diffusion welding furnace 4 and H 2 When the pressure in the furnace reaches the standard atmospheric pressure, start...
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