JPS5897465A - Continuous casting method for composite material - Google Patents

Abstract

PURPOSE:To cast sound composite materials having mirror surfaces continuously by maintaining the temp. on the inside wall surfaces in the outlet of a mold at temp. higher than the solidifying point of casting metal, and supplying molten metal for internal chill while penetrating core materials of high m.p. into the mold. CONSTITUTION:Core materials 6 of a material having a m.p. higher than that of casting metal are supplied into a hollow mold 1 by using a guiding pipe 5, and are connected onto a dummy bar 3. Molten metal 8 for internal chill is supplied into the mold 1. A heating element 2 is provided in the mold 1 to maintain the temp. on the inside wall surfaces in the outlet of the mold 1 at temp. higher than the solidifying temp. of the casting metal. The bar 3 is moved downward, and an internally chilled composite material 10 is solidified continuously by controlling the charging temp., the height of the molten metal, the descending speed of the bar 3 and the temp. of the materials 6 properly. According to such method, the composite materials in the shapes of wires, bars, plates, pipes, etc. which contain single or plural core materials, are free from surface defects and have mirror surfaces are cast easily and continuously.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a continuous casting method for a mirror composite material in which a core material is surrounded by metal. More specifically, by heating,
A linear core material made of metal or refractory and molten metal are continuously supplied from one end of a hollow mold whose inner wall surface is maintained at a temperature higher than the solidification temperature of the cast metal, and the surface layer is heated outside the mold outlet. The present invention relates to a method for continuously producing a cast composite material having an arbitrary cross-sectional shape such as wire, rod, plate, or tubular shape, which is determined by the cross-sectional shape of the hollow part of the mold, by forming a solidified shell of the mold.

Conventionally, wire or rod-shaped composite materials in which the entire core material has been added have been produced by placing a wire core material in a cylindrical mold, adding molten metal thereto, and filling it. However, with this method, there is a limit to the length of the composite core material, and it is not possible to create an infinitely long composite material. It is possible to manufacture composite materials continuously by supplying both the core material and the casting alloy into the hollow mold at the same time and casting the core material. Because the solidified shell of the composite material adheres to the casting wall, cracks occur on the surface when the composite material is pulled out of the mold, making it extremely difficult to continuously produce a sound composite material.

The present invention is directed to a wire-shaped, rod-shaped, plate-shaped, or tubular composite material having a built-in core material made of one or more of a high-melting point metal or a refractory metal, and having a mirror surface without surface defects. The purpose of this invention is to provide a method for manufacturing wood continuously.

That is, the present invention uses a hollow mold 1 between the nuclear power plants whose inner wall temperature is maintained at a temperature higher than the solidification temperature of the cast metal, and while continuously supplying a metal or refractory core material to the mold. The molten metal for casting is continuously supplied to form a solidified shell of the cast metal on the inner wall surface of the mold. The present invention relates to a continuous manufacturing method of a composite material, which is characterized by casting a core material around the core material, and a composite material having a mirror surface made in this way.

FIG. 1 is a vertical cross-sectional front view showing one embodiment of a composite material continuous casting apparatus for carrying out the present invention.

■The mold has the heating element metal shown in ■. ■ is a dummy bar for composite materials, and ■ the spray nozzle is injected with water,
Cooled by air or gas.

The core wire (2) is supplied and brought into contact with the dummy bar, and the molten metal (2) is supplied into the mold (2) through the hot water supply pipe (2).

The dummy bar (■) is lowered by the rotation Kj of the vinyl roll (■). By appropriately controlling the pouring temperature of the metal bath for casting, the height of the molten metal in the mold, the temperature of the mold inner wall, the descending speed of the dummy bar, and the temperature of the core material, a mirror surface can be achieved at the lower end of the mold outlet. The casting material (■) having the following properties is continuously produced.

What is most important in the present invention is that the molten metal supplied into the mold does not nucleate crystals on the inner wall surface of the mold, but is cooled in one direction through a dummy bar or a composite material that subsequently solidifies. It is necessary to allow coagulation to proceed. '1. In addition, various factors must be controlled to prevent molten metal from spouting out at the mold outlet. These factors include the solidification temperature of the cast metal, the pouring temperature, the temperature of the core material, the temperature of the inner wall of the mold, the height of the molten metal in the mold, the temperature and amount of the coolant, and the casting speed of the composite material. In particular, the casting speed and cooling conditions of the composite material are the most important factors. If the casting speed of the composite material is too high compared to the cooling rate, it can cause breakout at the mold exit.

The mold referred to in the present invention differs from the concept of conventional molds in which molten metal is solidified in the mold to produce ingots or castings, and the molten metal does not form a solidified shell on the inner wall surface of the mold. This mold is used to adjust the cross-sectional shape of the composite material that solidifies at the exit.

The method of the present invention is particularly superior to conventional methods for manufacturing cast-in composite materials. Composite materials that do not have grain boundaries that are likely to cause fractures can be easily and continuously cast in a direction perpendicular to the casting direction of wire- or rod-shaped composite materials that grow along the core material. It is.

4-4 An additional related original invention is that the temperature of the inner wall surface of the outlet of a mold for supplying molten metal from one end and continuously obtaining an ingot from the other end is maintained at a temperature higher than the solidification temperature of the cast metal. The present invention relates to a continuous casting method and a mold for a metal ingot, characterized by This is an application of the original invention that requires the temperature of the inner wall surface at the exit of the mold to be higher than the solidification temperature of the cast metal, and the present invention would not exist without the use of the original invention.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional front view showing one embodiment of the present invention. 1 Mold 7 Hot water supply pipe 2 Heating element 8 Molten metal 3 Dummy bar 9 Pinch roll 4 Coolant spray 1 O-composite material 5 Core wire supply guide tube 6 Core wire

Claims (1)

[Claims] 1. A core material made of one or more materials having a higher melting point than the cast metal is placed in a hollow mold whose inner wall temperature is maintained at a temperature higher than the solidification temperature of the cast metal by heating. , while being penetrated continuously. A continuous casting method for composite materials that is characterized by supplying molten metal into a mold and continuously scaling the composite material. 2. Can be made using a hollow mold whose inner wall temperature is maintained above the solidification temperature of the casting surface metal by heating.
A composite material that contains a core material with a higher melting point than cast metal, and has a mirror-like surface.