Ultrasonic treatment device and method for sprue cup during metal pouring
A technology of ultrasonic treatment and metal pouring, applied in metal processing equipment, casting molding equipment, casting molds, etc., can solve the problems of pollution, complicated operation, low efficiency, etc., and achieve high elongation, low cost, and no impact on production efficiency. Effect
Active Publication Date: 2017-12-22
DALIAN UNIV OF TECH
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Problems solved by technology
In order to further improve the mechanical properties of castings and other metal products, measures such as heterogeneous nucleating agents and temperature control treatments have been continuously proposed. The above measures have problems such as pollution, low efficiency, and complicated operation.
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[0038] The method for ultrasonically treating the sprue cup during the metal pouring process, the specific steps are as follows:
[0039] (1) Ingredient distribution ratio: by weight percentage, C: 3.5-3.9%, Si: 1.7-2.1%, Mg: 0.03-0.05%, Cu: 0.2-1.0%, Mn: 0.3-0.6%, S<0.025 %, P: <0.06%, Re: 0.012-0.015%, the total content of other impurities ≤0.02-0.05%, and the balance is Fe;
[0040] (2) Charge selection: low P and low S steel scrap 5% and iron filings 10%, recycle charge 35%, and the rest is high-purity pig iron, which is used as charge according to the composition ratio of step (1);
[0041] (3) Smelting and refining: use an intermediate frequency electric furnace to melt the charge to obtain molten iron, add industrial ferromanganese, industrial ferrosilicon and electrolytic copper according to the proportion of ingredients in step (1) for uniform melting, and then release the furnace after desulfurization and refining. The temperature of the furnace is: 1400-1480 ℃;
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Abstract
The invention discloses an ultrasonic treatment device and method for a sprue cup during metal pouring, and belongs to the technical field of metal material preparation and metallurgy. The device comprises the graphite sprue cup located on a production sprue cup, the graphite sprue cup is connected with an ultrasonic probe which is connected with an ultrasonic transducer through an amplitude-change pole, and the ultrasonic transducer is connected with an ultrasonic generator. The ultrasonic treatment device and method provided by the invention have the beneficial effects that a high-energy ultrasonic device is placed on the sprue cups, and the effects of crushing dendritic crystals, refining crystalline grains and homogenizing ingredients during pouring can be achieved; the device does not affect the pouring process or the production efficiency, the cost is low, and the device is applicable to large-scale industrial production; and by adopting the ultrasonic treatment method and device for the sprue cups during metal pouring, high-strength and high-elongation nodular cast iron is obtained.
Description
technical field [0001] The invention relates to ultrasonic treatment of metal liquid pouring, and belongs to the technical field of metal material preparation and metallurgy. Background technique [0002] The metal casting process and production links directly determine the quality of castings and other metal products. How to reduce defects in castings, refine grains, and improve the strength of castings is an eternal subject. With the development of metallurgical technology, a series of new technologies have emerged, the uniformity of the casting structure has been improved, and the gas and impurities have been continuously reduced, but the quality of the castings is far from reaching the highest level. In order to further improve the mechanical properties of castings and other metal products, measures such as heterogeneous nucleating agents and temperature control treatments have been continuously proposed, but the above measures have problems such as pollution, low effici...
Claims
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IPC IPC(8): B22C9/08B22D27/20C22C37/10C22C37/04C22C33/10
CPCC22C33/10C22C37/04C22C37/10B22C9/082B22D27/20Y02P10/20
Inventor 张兴国周秉文孟令刚亚斌房灿峰
Owner DALIAN UNIV OF TECH