Aluminum-titanium-boron-strontium-rare earth alloy wire rod and preparation method

Abstract

The invention provides an aluminum-titanium-boron-strontium-rare earth alloy wire rod and a preparation method. The aluminum-titanium-boron-strontium-rare earth alloy wire rod is prepared from, by weight, 90-110 parts of metallic aluminum, 20-30 parts of potassium fluotitanate, 10-15 parts of potassium fluoborate, 3-8 parts of lanthanum-cerium mixed rare earth and 3-8 parts of metallic strontium.The alloy wire can replace alloys needing to be refined and modified respectively, homogenization and extrusion treatment are used in the preparation process, product crystal grains are finer and moreuniform in distribution through multiple actions of heat treatment and external force, and the alloy wire rod is more efficient than a traditional product.

Description

technical field [0001] The invention relates to an aluminum-titanium-boron-strontium-rare earth alloy wire and a preparation method thereof, belonging to the technical field of aluminum alloys. Background technique [0002] Refinement and modification of aluminum alloy structure are necessary means to obtain excellent aluminum alloy properties. In order to refine the α grains, refiners with different elements such as Al-Ti, Al-Ti-B, Al-Ti-C and different element contents have been developed (such as AlTi10, AlTi5B1, AlTi5B0.2, AlTi5C0.2, etc. ) to adapt to the refinement of different aluminum alloy products. At the same time, in order to change the morphology and size of the second phase in the aluminum alloy, it is necessary to modify the aluminum alloy, for example, the hypoeutectic Al-Si alloy is modified by strontium. For this reason, people have developed AlSr alloy modifiers of different compositions (such as AlSr5, AlSr10, etc.) to modify the Al-Si eutectic phase in...

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Problems solved by technology

However, AlSr10 furnace modification treatment and AlTi5B1 on-line refinement treatment have obvious shortcomings, because the furnace treatment of AlSr10 alloy will produce a large amount of Sr loss, and the Sr loss will continue to oxidize and burn with the prolongation of the standing time, especially It is more serious when the molten aluminum is stirred or tumbled

With the prolongation of time, the strontium content in the slab gradually decreases, resulting in insufficient deterioration of some slabs, and the oxidation and burning of strontium is accompanied by severe gas absorption of molten aluminum.

In the process of adding AlTi5B1 to the online thinning launder, the typical disadvantage of AlTi5B1 is that Ti and B elements sink and deposit in places such as the launder, filter box and the bottom of the flow plate. The serious accumulation of Ti and B leads to surface defects of the alloy. Both rolled and extruded products have problems such as linear streak defects

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