Device and method for molten iron ultrasonic treatment on industrial casting site

An ultrasonic treatment and ultrasonic technology, applied in the direction of improving process efficiency, etc., can solve problems such as brittle fracture, difficulty in effectively processing metal melts, and ultrasonic power attenuation, so as to improve tissue uniformity, facilitate batch processing, reduce The effect of small lamellar spacing

Pending Publication Date: 2017-12-08
DALIAN UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the environment of industrial casting sites is complex, and the temperature of molten iron can reach 1500°C. The high temperature resistance and corrosion resistance of ultrasonic probes are required to be high. Traditional metal materials are difficult to meet the requirements. Even if cermets are used to avoid corrosion, there are still difficulties in processing and assembly. brittle fracture
Moreover, by applying a simple ultrasonic device to process large ladle molten iron melts in industrial casting sites, its range of action is extremely limited, and the ultrasonic power attenuates seriously under high temperature, making it difficult to effectively treat metal melts

Method used

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  • Device and method for molten iron ultrasonic treatment on industrial casting site
  • Device and method for molten iron ultrasonic treatment on industrial casting site
  • Device and method for molten iron ultrasonic treatment on industrial casting site

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Experimental program
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Effect test

Embodiment 1

[0039] The device for ultrasonic treatment of molten iron in the industrial foundry site is composed of a smelting device, a spheroidizing ladle, a transfer device, an ultrasonic treatment device and a pouring device. The ultrasonic processing device includes a counterweight 1, a bracket 2, a cylinder 3, a piston rod 4, a distance limiting device 5, a balance bar 6, a hand crank 7, a heat insulating plate 8, a chain transmission device 9, a rolling bearing 10, a rotating rod 11, Ultrasonic transducer 12 , horn 13 , ultrasonic device probe 14 and ultrasonic generator 15 . The cylinder 3 is placed on the top of the bracket 2 and fixed by threaded connection; the cylinder piston rod 4 and the balance rod 6 are connected by welding, and the cylinder piston rod 4 drives the balance rod to move up and down by controlling the cylinder switch; the distance limiting device 5 is welded on Below the top plate of the bracket 2, to control the moving distance of the piston rod 4 and the ba...

Embodiment 2

[0041] S1. Composition 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%, the balance is Fe;

[0042] S2. Furnace charge matching: 5% low-P and low-S steel scrap and 10% iron filings, 35% recycle charge, and the rest is high-purity pig iron, according to the composition ratio of step S1 as charge;

[0043] S3. Smelting and refining: Melt the charge in an intermediate frequency induction furnace to obtain molten iron, add industrial ferromanganese, industrial ferrosilicon and electrolytic copper according to the proportion of ingredients in step S1 to evenly smelt, and then release it from the furnace after desulfurization and refining.

[0044] S4. Spheroidizing treatment: select Z6S spheroidizing agent, and the addition ratio is 0.9%, to obtain molten iron after spheroidizing;

[0045] S5. The spheroidization package is transferred to the ...

Embodiment 3

[0054] The difference between the present embodiment and embodiment 2 is only that the process parameters of ultrasonic treatment are different. Ultrasonic device probe 14 stretches into the melt liquid level 500mm in the spheroidizing bag, ultrasonic process parameters: the frequency is 25KHz, the ultrasonic power is 2000W, and the processing time is 25KHz. 1min, the application method is continuous application.

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Abstract

The invention provides a device and method for molten iron ultrasonic treatment on an industrial casting site. The device is composed of a smelting device, a nodulizing ladle, a transferring device, an ultrasonic treatment device and a pouring device. Furnace burden is smelted through a smelting device, molten iron obtained after nodulizing is obtained in the nodulizing ladle by means of the nodulizing process. The nodulizing ladle is transferred to the position below the ultrasonic treatment device through the transferring device, the ultrasonic treatment device downwards move to enable an ultrasonic treatment device probe to go deep into the position 30 mm to 500 mm below the liquid face of melt in the nodulizing ladle for conducing ultrasonic treatment device on the molten iron, ultrasonic technological parameters are adjusted, cavitation bubbles will be generated in the metal melt, and the stirring effect is achieved. Meanwhile, crystal nucleuses are formed nearby the cavitation bubbles, and therefore the texture is refined. By means of the method and device, in cooperation with the actual conditions on the industrial casting site, ultrasonic treatment is applied to a production line more conveniently and quickly, batch processing is facilitated, and the excellent nodular cast iron mechanical property is obtained.

Description

technical field [0001] The invention belongs to the technical field of metal material preparation, and in particular relates to a device and method for ultrasonically treating molten iron in an industrial foundry site. Background technique [0002] As we all know, there are many factors that affect the quality of casting products, such as shape, process flow, raw material quality, worker quality, molten iron quality, heat treatment process, casting processing, etc., but the quality of molten iron is an important factor affecting the quality of castings. During the process of smelting, tempering and adding various metal elements in molten iron, there are various harmful gases and various non-metallic inclusions in the molten iron, and the process of adding certain metal elements due to material properties, melting point, density, particle size And other factors, it is difficult to guarantee their uniform melting in molten iron. Therefore, the research on the purification of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/10C22C37/04C22C33/08C21C1/10C21C7/00B22D1/00
CPCC21C1/105C21C7/00C22C33/08C22C37/04C22C37/10B22D1/00Y02P10/20
Inventor 亚斌蔡勇张兴国刘恒乐周秉文孟宪军孟令刚张国辉房灿峰张宝昌
Owner DALIAN UNIV OF TECH
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