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A grain refiner, al-ti-c technology, applied in the field of preparation of Al-Ti-C grain refiner, can solve the poor wettability of graphite and affect the preparation of Al-Ti-C grain refiner and the promotion and use of
Inactive Publication Date: 2013-01-23
JIANGXI UNIV OF SCI & TECH
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However, the wettability of graphite and aluminum is very poor, which affects the preparation and popularization of Al-Ti-C grain refiner to a certain extent.
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Embodiment 1
[0015] In the Al-2%Ti alloy, 0.5%, 4.3%, and 8.0% of the mass of TiC (corresponding to the content of C were respectively 0.1%, 0.85%, and 1.6%) were dispersed in it with nitrogen or argon, and added When the temperature is selected 800 ℃, 1100 ℃, 1400 ℃. At 720°C, add 0.2% of the prepared Al-Ti-C grain refiner to 1000g of aluminum melt, heat it for 10min after stirring, pour, corrode, and measure the grain size.
[0019] In the Al-6%Ti alloy, 0.5%, 4.3%, and 8.0% of the mass of TiC (corresponding to the content of C were respectively 0.1%, 0.85%, and 1.6%) were dispersed in it with nitrogen or argon, and added When the temperature is selected 800 ℃, 1100 ℃, 1400 ℃. At 720°C, add 0.2% of the prepared Al-Ti-C grain refiner to 1000g of aluminum melt, heat it for 10min after stirring, pour, corrode, and measure the grain size.
[0023] In the Al-10%Ti alloy, 0.5%, 4.3%, and 8.0% of the mass of TiC (corresponding to the content of C were respectively 0.1%, 0.85%, and 1.6%) were dispersed in it with nitrogen or argon, and added When the temperature is selected 800 ℃, 1100 ℃, 1400 ℃. At 720°C, add 0.2% of the prepared Al-Ti-C grain refiner to 1000g of aluminum melt, heat it for 10min after stirring, pour, corrode, and measure the grain size.
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Abstract
The invention relates to a method for preparing an Al-Ti-C grain refiner. The method comprises the following steps of: smelting titanium into an aluminium solution, controlling the temperature within a range from 800 to 1,400 DEG C, preserving the heat, and dispersing nano TiC into a titanium and aluminium melt by adopting nitrogen or argon to obtain the Al-Ti-C grain refiner. By the method, required equipment is simple; the technical flow is short; the preparation efficiency is high; TiC particles can be dispersed; and the method is simple and feasible. The Al-Ti-C grain refiner prepared by the method has a good grain refining effect; 0.2 percent of Al-Ti-C grain refiner is added into pure aluminium, and the heat is preserved for 2 hours, but the refining effect is not obviously decayed; and the Al-Ti-C grain refiner has good industrial application prospect.
Description
technical field [0001] The invention belongs to the technical field of metal material manufacture, and in particular relates to a method for preparing an Al-Ti-C grain refiner. Background technique [0002] Grain refinement is one of the important methods to improve the mechanical properties of aluminum and its alloys, reduce segregation, and improve the compactness of castings. There are many ways to refine grains, among which adding a refiner has the advantages of convenient operation, fast action, stable effect, simple equipment, etc. It is the most economical, effective and practical method of refinement. Previous studies have shown that adding grain refiners such as Al-Ti-B and Al-Ti-B-RE to aluminum and its alloy melts to obtain fine equiaxed crystals improves the mechanical properties and cutting properties of aluminum and its alloys , anti-fatigue performance and good product appearance. Therefore, Al-Ti-B grain refiners have been widely used in the casting process...
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