Method for adding grain refinement element Ti into cast aluminum silicon alloy
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A technology for casting aluminum-silicon alloys and grain refinement, which is applied in the field of metallurgy, can solve problems such as undiscovered patent documents, achieve excellent refining and refining effects, improve quality, and simplify the processing process
Active Publication Date: 2013-02-06
天津新立中合金集团有限公司
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Embodiment 1
[0023] A method for introducing grain refinement element Ti into a cast aluminum-silicon alloy, the refiner adopts potassium fluorotitanate powder, and the cast aluminum-silicon alloy is A356.2, the steps are:
[0024] ⑴The total feed is 15T, according to the internal control requirements of the composition of A356.2 alloy liquid, the required range of Ti content is: 0.08-0.15%, the Ca element is less than 0.003%; according to the content of 0.12% Ti content, weigh K 2 The mass of TiFx is 93kg;
[0025] (2) Put the weighed potassium fluorotitanate in a constant temperature preheating drying oven at 300°C and dry for 2 hours;
[0026] (3) Add aluminum ingots and metal silicon for remelting into the melting furnace, ignite and heat up, and control the melting temperature between 740 and 780 °C;
[0027] ⑷After the aluminum ingots and metal silicon for remelting are completely melted, metal magnesium is added, and the components are tested after fully stirring;
[0028] ⑸Except...
Embodiment 2
[0035] A method for introducing grain refinement element Ti into a cast aluminum-silicon alloy, the refiner adopts potassium fluorotitanate powder, and the cast aluminum alloy is AS7G03, the steps are:
[0036] ⑴The total feeding is 20T, according to the composition internal control requirements of AS7G03 alloy, the required range of Ti content is: 0.10~0.16, the Ca element is less than 0.0018%; according to the content of Ti 0.14, weigh K 2 TiF 6 The mass is 145kg;
[0037] (2) Put the weighed potassium fluotitanate in a constant temperature preheating drying oven at 250°C and dry for 2.5 hours;
[0038] (3) Add aluminum ingots and metal silicon for remelting into the melting furnace, ignite and heat up, and control the melting temperature between 750 and 770°C;
[0039] (4) After the aluminum ingots and metal silicon for remelting are completely melted, add intermediate alloys or pure metals of other elements except titanium, and carry out component detection after fully s...
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Abstract
The invention relates to a method for adding the grain refinement element Ti into cast aluminum silicon alloy. The method comprises the following concrete steps: (1) calculating the usage amount of titanium salt according to the demand of the titanium content in the cast aluminum silicon alloy, weighing and drying for 2-3 h in a constant temperature preheating and drying furnace with a temperature of 200-300 DEG C; (2) when the temperature of a cast aluminum silicon alloy melt reaches 700-760 DEG C, adding the preheated titanium salt into the surface of the aluminum alloy melt in a melting furnace, and stirring for 10-15 min by using a graphite stirring rod under a covering layer; and (3) fully stirring a cast aluminum silicon alloy solution, sampling to measure the components of the cast aluminum silicon alloy solution, and when the Ti content in the cast aluminum silicon alloy is close to the theoretical calculation value, removing dross generated on the surface from the melt, so as to achieve the effects of adding the Ti into the aluminum alloy solution, refining and removing calcium. According to the method, powdery potassium fluotitanate is selected as a refinement element for refinement and calcium removal of the aluminum alloy melt, the steps of preparing intermediate alloy, refining and degassing are removed, and the energy-saving and emission-reduction effects in the production process are achieved.
Description
technical field [0001] The invention belongs to the field of metallurgy and relates to the introduction of refinement elements into cast aluminum-silicon alloys, in particular to a method for introducing grain refinement element Ti into cast aluminum-silicon alloys. Background technique [0002] With the application of aluminum alloys in high-tech fields more and more widely, subsequent processing puts forward strict requirements on the structure and properties of aluminum alloys. The optimal structure of aluminum alloy requires that the aluminum alloy material has fine and uniform equiaxed grains. Adding a refiner to the aluminum melt to refine the grains of the ingot can improve the strength and plasticity of the aluminum material, thereby improving its comprehensive mechanical properties. performance and processing performance. In addition, the Ca content and gas content in the aluminum alloy seriously affect the mechanical properties of the alloy. The Ca in the aluminum...
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