Alloy casting rapid cooling ingot forming die system

Abstract

The utility model provides an alloy casting rapid cooling ingot forming die system, and particularly relates to a spheroidizing agent and nucleating agent alloy casting ingot forming method and a spheroidizing agent alloy ingot manufacturing method through an ingot forming die, and the alloy casting rapid cooling ingot forming system comprises a rapid cooling bottom die, an upper cover plate and a cooling device. The alloy casting rapid cooling ingot forming die system has the advantages that high-quality nodulizer and inoculant alloy can be produced safely and efficiently; heat conducted to the ingot mold by high-temperature alloy molten iron is rapidly taken away through the cooling pipeline, the cooling speed of liquid molten iron in the ingot mold is increased, the cooling time is shortened, the contact time of the ingot mold and the molten iron is shortened, the influence of heat on the ingot mold is reduced, the corrosion time of the molten iron on the ingot mold is shortened, and the service life of the ingot mold is prolonged. And the upper cover plate can well cover alloy iron liquid to prevent heat diffusion, so that the operation environment of workers is greatly improved, the labor intensity is reduced, and obvious effects of improving the product percent of pass, reducing the energy consumption and saving resources are achieved.

Description

Technical Field

[0001] The utility model provides an alloy casting rapid cooling ingot forming mold system, in particular to a spheroidizing agent and inoculant alloy casting and forming ingot forming mold system and a method for manufacturing a spheroidizing agent alloy ingot by using the forming mold system. Background Art

[0002] The utility model relates to a new manufacturing process equipment for alloy ingots, in particular to a method for manufacturing a dense component non-segregation, high-quality spheroidizing agent and inoculant alloy.

[0003] At present, the spheroidizer alloy is generally cast into an ingot mold at home and abroad by casting in a combined or single open ingot mold. After smelting, it is poured into the ingot mold. The temperature is reduced by natural cooling through air convection. The cooling time is long, and the casting mold is subjected to high temperature for a long time, which leads to high heat resistance requirements for the material of the ingot mold. Due to the long-term high temperature, the service life of the casting mold is short, and the bottom of the ingot mold is often cast by the alloy melt to produce pouring pits and cracks, which makes the ingot mold unable to continue to be used and scrapped; the cooling of the ingot mold relies on natural cooling, and the cooling speed is slow, and generally several or more than a dozen sets are required; at the same time, the spheroidizer and inoculant alloys have poor fluidity, and the absence of a cover plate to limit the thickness will cause the thickness of the alloy ingot to be different, which brings inconvenience to the later alloy processing, and the alloy is severely oxidized when exposed to the air for a long time, resulting in a large amount of waste of rare metal resources and poor environmental conditions at the production site.

[0004] The utility model aims to provide an alloy casting and rapid cooling ingot forming mold system, aiming to solve the technical problems in the prior art. Utility Model Content

[0005] In view of the above-mentioned technical problems existing in the prior art, a rapid cooling ingot mold system for alloy casting is provided. The use of the rapid cooling ingot mold system for alloy casting can greatly improve the operating environment of workers, reduce labor intensity, and has obvious effects on improving product qualification rate, reducing energy consumption, and saving resources.

[0006] The purpose and effect of the utility model are achieved by the following specific technical means:

[0007] The alloy casting rapid cooling ingot forming mold system comprises a rapid cooling bottom mold and an upper cover plate, a cooling device, an inlet and outlet temperature monitoring device, and a flow rate monitoring device;

[0008] The lower end of the rapid cooling bottom mold is provided with a plurality of pre-buried cooling pipes, the pipes are arranged in a straight horizontal manner, one end of the pipes is connected to the inlet of the cooling device through a pipe distributor, and the other end is connected to the return water of the cooling device through a pipe distributor;

[0009] The upper cover plate is provided with an alloy liquid inlet, which is in a wrapped shape; the upper cover plate is provided with a plurality of exhaust holes; the upper cover plate is provided with reinforcing ribs, which are arranged in a "well" shape;

[0010] The cooling device achieves the cooling purpose by rapid heat exchange of the cooling medium;

[0011] The inlet and outlet temperature monitoring collects the inlet and outlet temperature difference through the sensor, and then controls the flow rate of the cooling source through the PLC to achieve the purpose of rapid cooling;

[0012] The flow monitoring provides real-time feedback of flow signals and monitors the operation of the ingot mold based on the flow difference;

[0013] Preferably, a boss of casting thickness is provided in the rapid cooling bottom mold, the shape of which matches the shape of the outer diameter of the upper cover plate and the size of which is larger than the size of the outer diameter of the upper cover plate;

[0014] Preferably, the top retaining ring of the rapidly cooled bottom mold is tapered with a taper of 100-160 degrees, which can greatly reduce the friction resistance of demoulding, and is particularly conducive to the demoulding operation when extracting iron, and can easily and quickly extract the upper cover plate and the iron alloy block from the casting cavity;

[0015] Preferably, the manufacturing steps are:

[0016] (1) Place the upper cover plate on the thickness limiting boss in the bottom mold in advance;

[0017] (2) injecting the smelted spheroidizing agent alloy iron liquid into the ingot mold through the alloy liquid inlet;

[0018] (3) After feedback from various sensors, the cooling device quickly completes the alloy cooling process;

[0019] (4) During the cooling process, insert a pre-placed lifting rod into the exhaust hole, and lift and demould when the temperature drops to the appropriate temperature;

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] In the utility model, since the bottom mold cooling device accelerates the cooling speed of the alloy water, a dense alloy structure can be obtained, such as Figure 5As shown, the segregation of the spheroidizing agent components is effectively prevented, and the production of spheroidizing agent alloy ingots with uniform quality is realized. On the other hand, the surface of the spheroidizing agent alloy molten iron is in contact with the upper cover plate, thereby blocking the contact with the air, effectively inhibiting the oxidation of rare elements in the spheroidizing agent alloy, and effectively reducing the content of oxides in the spheroidizing agent. As an intermediate alloy for the production of ductile iron, the quality of the spheroidizing agent plays a vital role in the production of ductile iron. Therefore, it is particularly important to improve the quality of the spheroidizing agent. High-quality spheroidizing agents require low oxides, high density, and no component segregation, shrinkage cavities, shrinkage and other defects. Density is a manifestation of the high quality of the spheroidizing agent and an important indicator for determining the quality of the spheroidizing agent. The spheroidizing agent has a low density, and its density is quite different from that of the molten iron. During the spheroidizing treatment, the spheroidizing agent floats up quickly in the molten iron, which is not conducive to the full absorption of the spheroidizing agent. In actual production, increasing the density of the spheroidizing agent can make the spheroidizing agent react smoothly, prolong the reaction time, increase the absorption rate and prolong the time from spheroidizing to pouring, which can relatively reduce the amount of spheroidizing agent added and reduce the production cost of ductile iron. Therefore, the implementation of this project is timely and necessary.

[0022] This alloy casting and rapid cooling ingot mold system can improve the working environment, work efficiency, alloy quality and reduce production costs. It can be produced continuously without the need to prepare several or dozens of sets of equipment. It also reduces the consumption of ingot molds and the requirements for workshop area. It solves the heavy and dangerous pre- and post-preparation work and greatly reduces the labor intensity of workers.

[0023] Due to the strengthening of the intermolecular force of the liquid metal and the accelerated heat release, the cooling rate of the alloy is increased, so the solid solution strengthened grains are significantly refined, and the size of the primary silicon and eutectic silicon precipitated by fine grain strengthening is significantly reduced; the spheroidizing agent alloy solidification structure is refined and spheroidized, which improves the generation of foreign crystal nuclei during the spheroidization of ductile iron; at the same time, from the solidification theory, it can be known that the dendrite spacing determines the heat dissipation conditions on the solidification interface. The stronger the heat dissipation capacity, the smaller the influence of the crystallization latent heat precipitated by each dendrite, the smaller the dendrite spacing, and the higher the density, thus providing conditions for the production of high-quality ductile iron. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall system for rapidly cooling alloy into ingots of the utility model;

[0025] Figure 2 This is a schematic diagram of the bottom mold structure of the utility model;

[0026] Figure 3 This is a schematic diagram of the cover structure of the utility model;

[0027] Figure 4 It is a cross-sectional schematic diagram of the bottom mold of the utility model;

[0028] Figure 5 A metallographic comparison diagram of the product produced by the utility model and the product produced by the old process;

[0029] The following are marked in the figure:

[0030] Rapidly cool the bottom mold 1, the boss 6, the retaining ring 7, and the cooling pipe 8;

[0031] Upper cover plate 2, reinforcing ribs 9, lifting ring 10, exhaust hole 11, alloy liquid inlet 12;

[0032] Cooling device 3, flow monitoring 4, inlet and outlet temperature monitoring 5. DETAILED DESCRIPTION

[0033] See also Figure 1-4 , the embodiments of the utility model are further described;

[0034] An alloy casting rapid cooling ingot forming mold system, comprising a rapid cooling bottom mold 1 and an upper cover plate 2, a cooling device 3, an inlet and outlet temperature monitoring 5, and a flow monitoring 4;

[0035] The lower end of the rapid cooling bottom mold 1 is provided with a plurality of pre-buried cooling pipes 8, which are arranged in a straight horizontal layout, one end of which is connected to the inlet of the cooling device 3 through a pipe distributor; the other end is connected to the return water of the cooling device 3 through a pipe distributor; a boss 6 of casting thickness is provided in the rapid cooling bottom mold 1, and its outer diameter matches the outer diameter shape of the upper cover plate 2 and its size is larger than the size of the outer diameter of the upper cover plate 2; the top retaining ring 7 of the rapid cooling bottom mold 1 is conical, with a taper of 100 degrees to 160 degrees, which can greatly reduce the resistance of demoulding, is conducive to demoulding operation when taking out iron, and can easily and quickly extract the upper cover plate 2 and the iron alloy block from the casting container;

[0036] The upper cover plate 2 is provided with an alloy liquid inlet 12, which is in a wrapped shape; the upper cover plate is provided with a plurality of exhaust holes 11; the upper cover plate is provided with reinforcing ribs 9, which are arranged in a "well" shape; U-shaped lifting rings 10 are provided at both ends of the reinforcing ribs 9;

[0037] The cooling device achieves the cooling purpose through a cooling medium, wherein the cooling medium is water or gas;

[0038] The inlet and outlet temperature monitoring 5 collects the inlet and outlet temperature difference through the sensor, and then controls the flow rate of the cooling source through the PLC to achieve the purpose of rapid cooling;

[0039] The flow monitoring 4 is used to feed back the flow signal in real time and monitor the operation of the ingot mold according to the flow difference.

Claims

1. An alloy casting and rapid cooling ingot mold system, characterized in that: It comprises a rapid cooling bottom mold (1), an upper cover plate (2) and a cooling device (3); The upper cover plate (2) is covered on the rapid cooling bottom mold (1), and the rapid cooling bottom mold (1) is provided with a boss (6) for limiting thickness; A plurality of cooling pipes (8) are pre-buried under the rapid cooling bottom mold (1), and both ends of the cooling pipes (8) are connected to the cooling device (3) via a distributor; The cooling device is provided with flow monitoring (4) and inlet and outlet temperature monitoring (5) so as to control the flow of the cooling medium by monitoring the inlet and outlet temperature difference and adjusting the mold temperature.

2. The alloy casting and rapid cooling ingot forming mold system according to claim 1, characterized in that: The top retaining ring (7) of the rapid cooling bottom mold (1) is conical with an angle of 100-160 degrees.

3. The alloy casting and rapid cooling ingot forming mold system according to claim 1, characterized in that: The cooling pipeline (8) is arranged in a straight horizontal manner.

4. The alloy casting and rapid cooling ingot forming mold system according to claim 1, characterized in that: The upper end of the upper cover plate (2) is provided with reinforcing ribs (9), and the reinforcing ribs (9) are arranged in a "well" shape.

5. The alloy casting and rapid cooling ingot forming mold system according to claim 4, characterized in that: The reinforcing rib (9) is provided with a lifting ring (10), and the lifting ring (10) is located at both ends of the reinforcing rib (9).

6. The alloy casting and rapid cooling ingot forming mold system according to claim 1, characterized in that: The upper cover plate (2) is provided with exhaust holes (11), and the exhaust holes (11) are evenly distributed on the upper cover plate (2).

7. The alloy casting and rapid cooling ingot forming mold system according to claim 1, characterized in that: The upper cover plate (2) is provided with an alloy liquid inlet (12).

8. The alloy casting and rapid cooling ingot forming mold system according to claim 1, characterized in that: The cooling medium is water or gas.

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