Chilling disc for cooling, orienting and solidifying liquid metal

A liquid metal cooling and directional solidification technology, applied in the field of chilled plate, can solve the problems of large temperature fluctuation, uneven cooling intensity, large temperature fluctuation of the chilled plate, etc., and achieve the effect of uniform cooling intensity and balanced temperature of cooling medium

Inactive Publication Date: 2011-01-05
SHENYANG RES INST OF FOUNDRY
6 Cites 6 Cited by

AI-Extracted Technical Summary

Problems solved by technology

However, the temperature of the chilling plate fluctuates greatly. For example, when the heat preservation temperature of the mold is 1550°C and the depth of the chilling plate is immers...
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Abstract

The invention discloses a chilling disc for cooling, orienting and solidifying a liquid metal, which comprises a chilling disc body. The chilling disc for cooling, orienting and solidifying the liquid metal is characterized in that the chilling disc body is internally provided with an annular passage or a petal passage through which a liquid medium passes; and the chilling disc body is made of stainless steel or heat-resistant steel. The invention has uniform intensity of cooling, is in favor of the stable growth of the solidification front of a high-temperature alloy solid-liquid interface and the temperature equalization of a cooling medium around a mold.

Technology Topic

Directional solidificationCooling medium +8

Image

  • Chilling disc for cooling, orienting and solidifying liquid metal
  • Chilling disc for cooling, orienting and solidifying liquid metal
  • Chilling disc for cooling, orienting and solidifying liquid metal

Examples

  • Experimental program(1)

Example Embodiment

[0014] Example
[0015] A chilling plate for liquid metal cooling and directional solidification, comprising a chilling plate body 1, characterized in that the chilling plate body 1 has an annular channel 13 for the passage of a liquid medium or a petal-shaped channel 12 for the passage of the liquid medium. 1Made of stainless steel or heat-resistant steel.
[0016] The principle of use of the liquid metal cooling directional solidification chill plate of the present invention:
[0017] The chilled plate body 1 is fixed on a ceramic mold or mold assembly 5 with an open bottom as the bottom of the mold to prevent the mold from leaking. The most important thing is that the chilled plate body 1 can be cooled by a liquid medium heat-conducting oil. The liquid medium heat-conducting oil enters the chilled plate body 1 in the A direction through the inner hollow drawing shaft 2 and flows out in the B direction. During the directional solidification process, the heating and holding furnace 3 heater 4 (arranged above the annular partition 6) and heater 7 (arranged below the annular partition 6) preheated mold 5 received from the induction melting furnace (Figure The superalloy melt poured into the cavity by the traditional method in (not shown in), because the liquid medium in the chilling plate quickly takes away the heat transferred from the superalloy melt to the chilling plate, and the superalloy melt in contact with the chilling plate The body solidifies instantly, which promotes the competitive growth of nucleation and grains. Subsequently, the mold and the chill plate are driven by the pulling shaft 2 to slowly enter the liquid cooling medium tin 9 from the hole of the heat insulation baffle 8 at a certain speed. The liquid cooling medium tin is contained in the stainless steel container 10 and can be Driven by the lifting shaft 11, it moves up and down. Under the common cooling action of the chill plate and the liquid tin, the crystal grains grow upward in the axial direction until the entire casting is solidified. The known process method is to put the casting mold drawn from the heating and holding furnace at a high temperature (above 1500℃) and directly immerse it in the tin liquid, causing the temperature of the tin liquid to increase locally, although the stirring of the tin liquid has a certain cooling effect However, it takes a long time to reach the temperature equilibrium, and with the continuous immersion of the mold, more heat enters the tin, causing a local temperature rise of the tin liquid, resulting in a decrease in the temperature gradient at the solidification front of the solid-liquid interface, causing casting defects. The liquid medium in the chill plate can quickly take away the heat in the tin around the mold, maintain the uniformity of the tin liquid temperature near the mold, and facilitate the stable growth of crystals.

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Description & Claims & Application Information

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Classification and recommendation of technical efficacy words

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