Electrolytic aluminum liquid microalloyed hexabasic intermediate alloy and preparation and use method thereof

Abstract

The invention discloses electrolytic aluminum liquid microalloyed hexabasic intermediate alloy and a preparation and use method thereof. The electrolytic aluminum liquid microalloyed hexabasic intermediate alloy comprises the following components in percentage by mass: 1-6 percent of Sc, 1-5 percent of Zr, 0.1-3 percent of Ti, 1-6 percent of Hf, 6-12 percent of La and balance of aluminum. The preparation method comprises the following steps of: 1) well preparing high-purity aluminum, Sc2O3 powder, a fused salt system, high-purity sponge zirconium powder, high-purity sponge titanium powder, high-purity hafnium powder, metal lanthanum blocks and covering agents according to the mass percent of the components of the intermediate alloy; 2) conducting aluminothermic reduction to the Sc2O3 powder, the high-purity aluminum and the fused salt system at 950-980DEG C and preserving heat; 3) wrapping the hafnium powder by using an aluminum foil, adding the hafnium powder into aluminum liquid, agitating the mixture, heating the mixture to 1150 plus or minus 20DEG C and preserving heat; and 4) slagging off, taking and pouring alloy solution into a new crucible for continuous smelting, heating the alloy solution to 970 plus or minus 20DEG C, adding the sponge zirconium powder, the sponge titanium powder and the metal lanthanum blocks, adding the covering agents, preserving heat, conducting high-intensity ultrasonic treatment, conducting refining, degassing and deslagging, pouring the obtained alloy liquid in an iron mold and obtaining an intermediate alloy cast ingot after cooling.

Description

technical field [0001] The invention relates to the field of alloy materials, in particular to a six-component master alloy microalloyed with electrolytic aluminum liquid and a preparation and use method thereof. Background technique [0002] my country's aluminum industry presents the characteristics of the separation of electrolytic aluminum industry and aluminum processing industry. The existing aluminum forming technology cannot use high-temperature electrolytic aluminum to directly form semi-finished products, but cast electrolytic aluminum liquid into remelted aluminum ingots, and then melt the aluminum ingots It is molten aluminum and cast into various round ingots, square ingots and strip blanks. The long-process aluminum alloy processing technology using remelted aluminum ingots has many problems such as complex procedures, long process, high energy consumption, serious pollution, and low yield. Therefore, it is of great significance to develop a short-process techn...

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Problems solved by technology

[0006] In short, compared with the aluminum alloy melt, no master alloy has been found to play an effective composite role in the purification and microalloying of electrolytic aluminum liquid. Therefore, a master alloy for purifying and microalloying electrolytic aluminum liquid is designed, and Inventing a low-cost, large-scale preparation process and its application method for this intermediate alloy is the key issue in the development of a short process technology for the production of aluminum alloy semi-finished products using electrolytic aluminum liquid