Copper-steel composite casting molding device and casting method thereof

Abstract

The invention relates to the technical field of composite material production in iron and steel smelting, in particular to a copper and steel composite casting molding device and a casting method thereof.The copper and steel composite casting molding device comprises a funnel brick, a heat preservation groove, an air blowing device, a fastening frame, a temperature measuring device, a filtering device and a sprue gate, the fastening frame is arranged on the upper portion in the heat preservation groove, and a gap is reserved between the fastening frame and the groove wall of the heat preservation groove; a funnel brick is arranged above one side of the insulation groove with the gap between the insulation groove and the fastening frame, a filter device is arranged at the center of the bottom of the funnel brick, a sprue gate is arranged at the bottom of the filter device, and the bottom of the sprue gate is arranged above the gap; a blowing device is arranged on the wall of the side, with the gap reserved between the heat preservation groove and the fastening frame, of the heat preservation groove, a copper plate is arranged in the fastening frame, and a temperature measuring device is arranged at the top of the heat preservation groove. And the compounded material is rolled into the composite steel through subsequent rolling.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of composite material production in steel smelting, in particular to a copper-steel composite casting forming device and a casting method thereof. BACKGROUND

[0002] Composite material generally refers to two or more materials that are combined together through extrusion, explosive welding, rolling method, and the composite material has different functions in different layers. Copper-steel composite material is widely used. In the past three decades, because copper alloy has the advantages of high strength, high electrical conductivity, high thermal conductivity, corrosion resistance, and oxidation resistance, it has begun to gradually replace some expensive metal alloys and become the main material or ideal material in the fields of electronics and electric power, chemical industry, and marine corrosion resistance. However, copper alloy is not as good as steel material in mechanical strength and wear resistance, and the price is high, so the copper-steel bimetallic composite material that takes into account electrical conductivity, mechanical strength, and low price has become a development trend.

[0003] At present, the copper-steel composite methods mainly include explosive composite method, rolling composite method, powder metallurgy method, diffusion composite method, centrifugal casting method, continuous casting and rolling composite method, and casting composite method. However, the above copper-steel composite methods have poor composite effect, complex composite equipment, difficult operation, high composite process difficulty, many inclusions, and large defects in the copper-steel composite material.

[0004] The authorized announcement number CN101474903B "Bismuth bronze-steel composite bimetallic bearing material and its manufacturing method" uses carbon steel as the base material, and bismuth bronze alloy as the surface layer. The bismuth bronze alloy is sintered on the surface of the carbon steel material. The bismuth bronze alloy is sintered on the surface of the carbon steel material by using the principle of powder metallurgy sintering method. However, the interface bonding of this method is poor, and the mechanical properties are poor.

[0005] The authorized announcement number CN101845591B "Copper-steel composite material and its preparation method" has a chemical composition weight ratio of Cu 10-15%, steel 85-90%, and the structure is that copper and steel are combined into one. After surface treatment, the copper and steel strips are cold-rolled into high-precision steel strips and high-precision copper strips. After surface cleaning, the surface residues are removed, degreasing, and cold-rolled into high-precision copper-steel composite strips, and annealing. However, the production efficiency is low, and the success rate is low by using the cold-rolling rolling composite method, and the product is prone to delamination.

[0006] In the authorized announcement No. CN1131119C "Production of copper steel composite material by isothermal welding method", first, the protective agent is added into the gap between the steel core rod and the outer wall of the composite blank without the steel core rod, then electrolytic copper is added into the hopper of the composite blank; the composite blank after adding the material is put into the already heated well type electric furnace, heated to 1130-1150℃, after the electrolytic copper is completely melted, the electric furnace is powered off from the bottom, and the composite blank is sequentially cooled from the bottom to the top. However, the production of bimetallic composite material is limited by production equipment, the size is limited, and large-scale production cannot be realized. SUMMARY

[0007] In order to overcome the shortcomings of the prior art, the present application provides a copper steel composite casting forming device and a casting method thereof, which realizes the compounding of two steel types by the way of liquid metal casting solid metal, melts the surface of one solid steel type by controlling the temperature of the liquid metal, and realizes the compounding of two steel types by high temperature melting of the surfaces of two steel types to reach a certain melting layer, so that the compounding effect is good, there are no defects and inclusions, the process is simple, easy to operate, and the compounded material is rolled into composite steel material through subsequent rolling.

[0008] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0009] A copper steel composite casting forming device, comprising a hopper brick, a heat preservation tank, a gas blowing device, a fastening frame, a temperature measuring device, a filtering device and a pouring port, the fastening frame is arranged on the upper part of the tank, and the fastening frame and the tank wall have a gap, the hopper brick is arranged above the tank on the side of the gap between the tank and the fastening frame, the filtering device is arranged at the bottom center of the hopper brick, the pouring port is arranged at the bottom of the filtering device, and the bottom of the pouring port is arranged above the gap; the gas blowing device is arranged on the tank wall on the side of the gap between the tank and the fastening frame, the copper plate is arranged in the fastening frame, and the temperature measuring device is arranged on the top of the tank.

[0010] Further, the outer sides of the hopper brick and the heat preservation tank are fixed by iron wires.

[0011] Further, the fastening frame is fixed and formed in the inner side of the tank wall after being heated by a mixture of electrically fused magnesia and sodium silicate.

[0012] Further, the height of the gas blowing device is 15-30mm higher than the height of the fastening frame.

[0013] Further, the other side tank wall of the heat preservation tank relative to the gas blowing device is provided with a storage tank.

[0014] Further, the thickness of the copper plate is 25mm-40mm, and the distance between the bottom plane of the copper plate and the bottom surface of the heat preservation tank is 3cm-10cm.

[0015] Further, the copper-steel composite pouring forming device has the pouring method:

[0016] S1, the copper-steel composite pouring forming device is baked at a temperature above 400 DEG C for more than 2 hours, and then is placed into a vacuum induction melting furnace, the vacuum induction melting furnace normally melts a steel liquid, after adjusting the steel liquid and pouring temperature, pouring is started, and the pouring temperature is the liquidus temperature of the steel liquid + 5-15 DEG C;

[0017] S2, the copper plate is fixed and clamped in the fastening frame, the steel liquid enters the bottom of the heat preservation groove through the funnel brick pouring port, the pouring speed is 1-2 kg / s, the steel liquid forms a molten pool at the bottom of the heat preservation groove, as the pouring continues, the liquid level rises, and when the distance between the liquid level and the copper plate is 2-5 cm, the pouring is paused;

[0018] S3, the bottom of the copper plate is preheated by using the heat radiation of the steel liquid, the temperature above the copper plate is ensured to be 400-500 DEG C, and the blowing device is started to blow the dross above the steel liquid to the other side storage groove;

[0019] S4, the temperature of the steel liquid is measured, the steel liquid continues to be poured when the temperature of the steel liquid is at the liquidus temperature + 5-15 DEG C, meanwhile, the blowing device blows the copper plate upper surface to cool the copper plate upper surface, when the steel liquid contacts the copper plate, the steel liquid melts the bottom surface of the copper plate, and the copper-steel composite material is formed by fusion and cooling.

[0020] Compared with the prior art, the copper-steel composite pouring forming device has the beneficial effects that:

[0021] The device realizes the compounding of two steel types in the mode that liquid phase metal pours solid phase metal, melts the surface of a solid steel type by controlling the temperature of the liquid metal, and realizes the compounding of two steel types by melting and fusing the surfaces of the two steel types at high temperature to reach a certain fusion layer, so that the fusion layer of the two materials is good, the contact surface is not layered, and there is no impurity, the device structure is simple, operation is convenient, and the copper-steel composite material steel plate can be rolled in the next step. BRIEF DESCRIPTION OF DRAWINGS

[0022] Fig. 1 It is a copper-steel composite pouring forming device structure schematic view.

[0023] Fig. 2 It is a copper-steel composite pouring forming device structure side view.

[0024] Fig. 3 It is a copper-steel composite pouring forming device structure top view.

[0025] In the drawing: 1, funnel brick; 2, heat preservation groove; 3, copper plate; 4, blowing device; 5, fastening frame; 6, temperature measuring device; 7, filtering device; 8, pouring port. DETAILED DESCRIPTION

[0026] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings:

[0027] Example: Figs. 1-3 As shown, the composite casting of carbon steel and copper plate was completed. The copper plate used for the composite was pure copper, and the steel was 45# steel.

[0028] A copper-steel composite casting molding device includes a funnel brick 1, an insulation tank 2, an air blowing device 4, a fastening frame 5, a temperature measuring device 6, a filter device 7, and a pouring port 8. The insulation tank 2 has a trapezoidal interior, smaller at the bottom and larger at the top, with the angle between the bottom and the side of the trapezoid being 30°. The fastening frame 5 is installed at the upper part of the insulation tank 2, with a gap between the fastening frame 5 and the tank wall. The funnel brick 1 is installed above the side of the insulation tank 2 with the gap between the fastening frame 5 and the wall. The filter device 7 is installed at the center of the bottom of the funnel brick 1. The filter device 7 is a zirconia ceramic foam filter with a thickness greater than 10 mm and a pore size density greater than 10 ppi. The pouring port 8 is located at the bottom of the filter device 7. The bottom of the inlet 8 is positioned above the gap, ensuring that the molten steel can flow from above the funnel brick 1 to the bottom of the insulation tank 2 and rise, where it contacts the copper plate 3 to achieve fusion. An air blowing device 4 is installed on the wall of the insulation tank 2 on the side where the gap exists between the insulation tank 2 and the fastening frame 5. The air blowing device 4 is positioned slightly higher than the copper plate 3 and at a certain angle, which can blow impurities above the surface of the molten steel into the storage tank on the other side, preventing scum from remaining on the copper-steel interface and affecting the composite effect. The copper plate 3 is placed inside the fastening frame 5 and fixed within the insulation tank 2 by the fastening frame 5, preventing it from floating and moving due to buoyancy when in contact with the molten steel 3. A temperature measuring device 6 is installed at the top of the insulation tank 2 to measure the temperature of the molten steel.

[0029] The heat preservation tank 2 is made of silicon dioxide and aluminum oxide, and is fixed with iron wire around its perimeter to prevent steel leakage and cracking; the funnel brick 1 is made of silicon dioxide and aluminum oxide, and is fixed with iron wire on its outer side to prevent it from cracking due to heat.

[0030] The fastening frame 5 is formed by heating fused magnesium oxide mixed with sodium silicate and fixing it to the inner side of the heat preservation tank 2.

[0031] The height of the air blowing device 4 is 30mm higher than the height of the fastening frame 5. The air blowing device 4 can blow away the slag on the surface of the molten steel, and can also blow towards the upper part of the copper plate 3 to achieve the effect of air cooling.

[0032] The heat preservation tank 2 is provided with a storage tank on the inner side of the tank wall opposite to the air blowing device 4 to store the liquid surface residue that has been blown away.

[0033] The copper plate 3 is used as the base material copper for copper-steel composite. The surface of the copper plate is free of impurities and rust. The thickness of the copper plate is 30mm, and the bottom distance of the insulation tank is 5cm.

[0034] The copper-steel composite pouring forming device has the pouring method as follows:

[0035] S1, the copper-steel composite pouring forming device is baked at a temperature above 450 DEG C for 2 hours, and then is placed into a vacuum induction melting furnace; the vacuum induction melting furnace normally melts the molten steel; after the molten steel and the temperature are adjusted, pouring is started; the pouring temperature is liquidus+15 DEG C;

[0036] S2, the copper plate 3 is fixed and clamped in the fastening frame 5; the molten steel enters the bottom of the heat preservation groove 2 through the pouring opening 8 of the funnel brick 1; the pouring speed is 1 kg / s; the molten steel forms a molten pool at the bottom of the heat preservation groove 2; as the pouring continues, the liquid level rises; when the molten steel rises to a distance of 2 cm from the copper plate 3, the pouring is paused;

[0037] S3, the bottom of the copper plate 3 is preheated and warmed up by using the heat radiation of the molten steel for 10 s; the temperature above the copper plate 3 is ensured to be 400-500 DEG C; meanwhile, the blowing device 4 is started to blow the scum above the molten steel to the other storage groove, so as to prevent the scum from staying on the copper-steel interface and affecting the composite effect;

[0038] S4, the temperature is measured by the temperature measuring device 6; when the temperature is liquidus+10 DEG C or so, the molten steel continues to be poured until the liquid level contacts the copper plate 3; meanwhile, the blowing device 4 blows to the upper surface of the copper plate 3 to reduce the temperature above the copper plate; the molten steel melts the bottom surface of the copper plate 3, and fuses and cools, so as to form the copper-steel composite material; the pouring is terminated.

[0039] After the furnace is cooled, the pouring device is taken out; the heat preservation groove 2 is broken; the copper-steel composite material is obtained; the composite effect is good; there is no defect and inclusion.

[0040] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this; any person skilled in the art, according to the technical solution and the concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A copper-steel composite casting molding apparatus, comprising a funnel brick, a heat-insulating tank, an air blowing device, a fastening frame, a temperature measuring device, a filtering device, and a pouring gate, characterized in that, A fastening frame is installed at the upper part of the insulation tank, with a gap between the fastening frame and the tank wall. A funnel brick is installed above the insulation tank on the side with the gap, and a filter device is installed at the center of the bottom of the funnel brick. A pouring port is installed at the bottom of the filter device, and the bottom of the pouring port is located above the gap. An air blowing device is installed on the tank wall on the side with the gap between the insulation tank and the fastening frame. A copper plate is installed inside the fastening frame, and a temperature measuring device is installed at the top of the insulation tank.

2. The copper-steel composite casting molding apparatus according to claim 1, characterized in that, The funnel brick and the insulation trough are fixed with iron wire on the outside.

3. The copper-steel composite casting molding device according to claim 1, characterized in that, The fastening frame is formed by heating and fixing fused magnesium abrasive mixed with sodium silicate to the inner side of the heat preservation tank wall.

4. The copper-steel composite casting molding apparatus according to claim 1, characterized in that, The height of the air blowing device is 15mm to 30mm higher than the height of the fastening frame.

5. The copper-steel composite casting molding apparatus according to claim 1, characterized in that, A storage tank is provided on the inner side of the heat preservation tank opposite to the air blowing device.

6. The copper-steel composite casting molding apparatus according to claim 1, characterized in that, The copper plate is 25mm to 40mm thick, and the bottom plane of the copper plate is 3cm to 10cm away from the bottom of the insulation tank.

7. A casting method for a copper-steel composite casting molding apparatus according to claim 1, characterized in that, The casting method of the copper-steel composite casting molding device described above: S1. After baking the copper-steel composite casting molding device at a temperature above 400℃ for more than 2 hours, place it into the vacuum induction melting furnace. The vacuum induction melting furnace melts the molten steel normally. After adjusting the molten steel and the casting temperature, start casting. The casting temperature is the liquidus temperature of the molten steel +5 to 15℃. S2. The copper plate is fixedly clamped in the fastening frame. The molten steel enters the bottom of the heat preservation tank through the pouring port of the funnel brick. The pouring speed is 1-2 kg / s. The molten steel forms a molten pool at the bottom of the heat preservation tank. As the pouring continues, the liquid level rises. When the distance between the liquid level and the copper plate is 2-5 cm, the pouring is stopped. S3. Use the thermal radiation of molten steel to preheat the bottom of the copper plate to ensure that the temperature above the copper plate is 400-500℃. At the same time, turn on the air blowing device to blow the slag above the molten steel to the other storage tank. S4. Measure the temperature of the molten steel. The temperature of the molten steel is between +5 and 15°C from the liquidus temperature. Continue to pour the molten steel. At the same time, the air blowing device blows air onto the upper surface of the copper plate to cool the upper part of the copper plate. When the molten steel comes into contact with the copper plate, the molten steel melts the bottom surface of the copper plate and fuses and cools to form a copper-steel composite material.

Images