Magnesium-based hydrogen storage alloy block and preparation method thereof
A technology of magnesium-based hydrogen storage alloy and magnesium block, which is applied in the direction of metal extrusion control equipment, metal processing equipment, manufacturing tools, etc., can solve the problems of unsatisfactory hydrogen absorption performance, achieve lower temperature, high cycle times, The effect of reducing the hydrogen charging and discharging time
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[0028] The present application proposes a method for preparing a magnesium-based hydrogen storage alloy block, which includes the following steps: the magnesium block, the magnesium-nickel master alloy, and the magnesium-rare-earth master alloy are mixed according to the mass ratio of magnesium element, nickel element, and rare earth element to 50-90:10 -20:1-10 smelting and pouring to obtain alloy ingots; then the alloy ingots are hot-extruded into alloy rods and processed into alloy electrodes; then the alloy electrodes are atomized and powdered to obtain magnesium-nickel-rare earth hydrogen storage Alloy powder, the magnesium-nickel-rare earth hydrogen storage alloy powder is pressed into shape.
[0029] By adding a magnesium-nickel master alloy to the raw material, the nickel contained in it can form a solid solution with the magnesium in the raw material. The binding force between nickel and hydrogen is weak, and the formation enthalpy of hydride is low. Nickel has a catal...
Embodiment 1
[0067] This embodiment provides a magnesium-based hydrogen storage alloy block, which is prepared by the following method:
[0068] According to the composition of Mg:Ni:Y mass ratio of 80:10:10, mix magnesium block, magnesium-nickel master alloy and magnesium rare earth master alloy, and melt in a well-type resistance furnace at 720°C and 500r / min for 2 hours , Pouring at 690°C for 20min. The above smelting and pouring process are in SF 6 and CO 2 under the protection of the mixed gas.
[0069] The poured alloy ingot was hot-extruded at 450° C. with an extrusion deformation ratio of 100:1 to obtain an alloy rod. Before extrusion, the mold is preheated at a preheating temperature of 200°C, and the extrusion cylinder is preheated at a preheating temperature of 250°C.
[0070] Process the prepared alloy rod into an alloy electrode, put the electrode into the plasma rotating electrode powder making equipment for atomization and powder making, the electrode rotation speed is 1...
Embodiment 2
[0074] This embodiment provides a magnesium-based hydrogen storage alloy block, which is prepared by the following method:
[0075] According to the composition of Mg:Ni:Y mass ratio of 80:15:5, mix magnesium block, magnesium-nickel master alloy and magnesium rare earth master alloy, and melt in a well-type resistance furnace at 710°C and 200r / min for 3h , Pouring at 680°C for 5 minutes. The above smelting and pouring process are in SF 6 and CO 2 under the protection of the mixed gas.
[0076] The poured alloy ingot was hot-extruded at 430° C. with an extrusion deformation ratio of 200:1 to obtain an alloy rod. Before extrusion, the mold is preheated at a preheating temperature of 100°C, and the extrusion barrel is preheated at a preheating temperature of 100°C.
[0077] Process the prepared alloy rods into alloy electrodes according to the required size, put the electrodes into the plasma rotating electrode powder making equipment for atomization and powder making, the el...
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Abstract
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