Hard alloy connecting piece
A cemented carbide and connector technology, applied in welding equipment, metal layered products, metal processing equipment, etc., can solve the problems that high-end cemented carbide tools and precision instrument tile alloys cannot meet or cannot meet, and achieve good high temperature The effect of red hardness, smooth transition and high wear resistance
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Embodiment 1
[0014] Select WC-Co cemented carbide with a thickness of 2mm (with a Co content of 18%) as the welded material 1, and select an Invar alloy with a thickness of 2mm (its composition and composition mass percentage are: 42% Ni and 58% Fe) For the material to be welded 2, choose a tungsten argon arc welding machine of the model NASTERTIG AC / DC 2500, and operate according to the conventional argon tungsten arc automatic welding process. The welding process parameters are: welding current 90A, welding voltage 11V, welding speed 4mm / sec, tungsten rod gun tip diameter 0.5~2mm, tungsten rod gun tip extension length 3~8mm, argon gas flow rate 10L / min, argon gas pressure 0.35Mpa at room temperature, welding process adopts direct current connection method.
[0015] After testing: the welded joint between the high-binder phase cemented carbide and the Invar alloy prepared in this example has no air holes, cracks, no η carbide formation at the interface, and the microhardness of the weld zo...
Embodiment 2
[0017] The WC-Co cemented carbide (wherein the Co content is 40%) with a thickness of 2mm is selected as the welded material 1, and the NiFeC-based rare earth Invar alloy with a thickness of 2mm is selected (its composition and composition mass percentage are: 30% Ni, 1 %C, 3.4% Mn, 5% Nb and 60.6% Fe) are the materials to be welded 2, and the argon tungsten arc welding machine model NASTERTIG AC / DC 2500 is selected, and the operation is performed according to the conventional argon tungsten arc automatic welding process. But no pre-weld preheating and post-weld heat treatment, no bevel opening and no filler material added, the welding process parameters are: welding current 180A, welding voltage 20V, welding speed 7mm / sec, tungsten rod tip diameter 0.5~2mm, tungsten The protruding length of the gun tip is 3-8mm, the flow rate of argon gas is 15L / min, the pressure of argon gas is 0.35Mpa at room temperature, and the welding process adopts the direct current connection method. ...
Embodiment 3
[0020] Select WC-Co cemented carbide with a thickness of 4mm (with a Co content of 30%) as the welded material 1, and select a NiFeC-based rare earth Invar alloy with a thickness of 2mm (its composition and composition mass percentage are: 35% Ni, 0.8 %C, 3.4% Mn, 4% Nb and 56.8% Fe) are the materials to be welded 2, and the argon tungsten arc welding machine model NASTERTIG AC / DC 2500 is selected, and the operation is performed according to the conventional argon tungsten arc automatic welding process. But no pre-weld preheating and post-weld heat treatment, no bevel opening and no filler material added, the welding process parameters are: welding current 130A, welding voltage 15V, welding speed 1mm / sec, tungsten rod tip diameter 0.5~2mm, tungsten The protruding length of the gun tip is 3-8mm, the flow rate of argon gas is 3L / min, the pressure of argon gas is 0.35Mpa at room temperature, and the welding process adopts the direct current connection method.
[0021] After testi...
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