Preparation process and equipment of titanium-cobalt alloy TiC-9ALC-5USCBN

Abstract

The invention relates to the technical field of titanium-cobalt alloy processing technologies and equipment, in particular to a preparation technology and equipment of a titanium-cobalt alloy TiC-9ALC-5USCBN. The preparation technology comprises the steps that S1, alloy metal and pig iron powder are prepared; the alloy metal and the pig iron powder are subjected to rough filtration, and impurities are removed; s2, weighing the raw materials according to the formula ratio; s4, pig iron powder is added into a smelting furnace to be smelted, S5, molten iron in the molten state in the step S4 is subjected to desulfurization and deoxidation treatment, S6, alloy metal is added into a crucible to be smelted for the first time, and after complete melting, air cooling is conducted to obtain an intermediate alloy material B, and S7, the intermediate alloy material B is added into the molten iron obtained in the step S5, and the product A is obtained. Meanwhile, the 1450 DEG C brittleness and the high heat conductivity coefficient of ferrite stainless steel are kept, the characteristics of superplasticity, dry burning resistance, abrasion resistance and the like are achieved, the service life of products is greatly prolonged, the service cycle of manufacturers is prolonged, the overhaul frequency is reduced, the maintenance cost of enterprises is reduced, and the economic benefits of the enterprises are increased.

Description

Technical Field

[0001] The invention relates to the technical field of titanium-cobalt alloy processing technology and equipment, and in particular to a preparation technology and equipment of a titanium-cobalt alloy TiC-9ALC-5USCBN. Background Art

[0002] There are many high-temperature wear conditions in thermal power generation, petrochemical and other industries, such as the hood and center tube in the fluidized bed boiler of a thermal power plant. Under this condition, they must withstand high-temperature oxidation of 950-1150°C and severe impact wear of coal powder and ash during use. They must withstand both high temperatures and wear, and the consumption of accessories is very serious. Many heat-resistant steels currently in use, such as heat-resistant steels represented by ZG25Cr20Ni14Si2, ZG40Cr25Ni12Si2, and ZG40Cr25Ni20Si2, have high alloy steels with high oxidation resistance and good high temperature resistance, and are widely used in thermal power plants across the country.

[0003] At present, thermal power generating units frequently perform peak load regulation and low-load operation. At this time, some burners on the upper layer of the boiler are out of service, which causes dry burning and damage to the burner components (nozzles, etc.) and the boiler superheater tube panel fixing device (tube clamp). Therefore, higher requirements are placed on the high temperature resistance and dry burning resistance of the materials. In addition, the heat-resistant steel (nozzles, wind caps) used under high-temperature impact and wear conditions has poor wear resistance. Under the high-speed impact of coal powder and ash, they fail due to wear or oxidation after 1-2 cycles, resulting in a significant reduction in service life and rising replacement and maintenance costs. Summary of the invention

[0004] Technical issues solved

[0005] In view of the above-mentioned shortcomings of the prior art, the present invention provides a preparation process and equipment of titanium-cobalt alloy TiC-9ALC-5USCBN, which can effectively solve the problem of poor wear resistance of heat-resistant steel (nozzles, wind caps) used under high-temperature impact and wear conditions in the prior art, while also improving the dry-burning resistance and high-temperature resistance of boiler burner components and superheater tube panel fixing devices.

[0006] Technical Solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] The invention provides a preparation process of a titanium-cobalt alloy TiC-9ALC-5USCBN, comprising the following steps: S1: preparing alloy metal and pig iron powder; and coarsely filtering the alloy metal and the pig iron powder to remove impurities; S2: weighing raw materials of a formula amount; S3: mixing the raw materials of the formula evenly, grinding them, and obtaining a product A; S4: adding the pig iron powder into a melting furnace for melting; S5: desulfurizing and deoxidizing the molten iron in S4; S6: adding the alloy metal into a crucible for primary smelting, and air cooling after the molten iron is completely melted to obtain an intermediate alloy material B; S7: adding the intermediate alloy material B into the molten iron after the step S5, alloying, melting, and performing secondary refining to obtain a rough ingot product C; S8: heating the rough ingot product C, melting it, and magnetically stirring it until it is uniform, standing it, casting it, and air cooling it after it is taken out of the furnace; heating it again, and air cooling it to room temperature to prepare a product titanium-cobalt alloy.

[0009] Furthermore, in step S1, the raw materials include pig iron powder, tungsten carbide, titanium carbide, cobalt powder, chromium carbide, rare earth metal powder, and copper-zinc composite powder, wherein, by weight, there are 60-85 parts of tungsten carbide, 11-15 parts of titanium carbide, 25-30 parts of cobalt powder, 1-2 parts of chromium carbide, 1-2 parts of rare earth metal powder, and 2-8 parts of copper-zinc composite powder, and the rare earth metal powder includes 0.5-0.8 parts of lanthanum, 0.5-0.8 parts of cerium, and 0.8-1 parts of niobium.

[0010] Furthermore, in step S5 and step S7, refining agents need to be added during the desulfurization, deoxidation operations and secondary refining.

[0011] Furthermore, the titanium-cobalt alloy is prepared by a casting process.

[0012] Furthermore, in step S8, when heating up again, the temperature is 1000-1150°C, kept warm for 5-10 minutes, and then air-cooled to room temperature.

[0013] Furthermore, in the primary smelting in S6, the temperature reaches 1350-1500°C.

[0014] Furthermore, the heat-resistant temperature of the alloy material reaches 1250-1500°C.

[0015] In this case, in order to achieve the above objectives, the present invention also introduces an equipment structure for preparing titanium-cobalt alloy, and includes a preparation process of titanium-cobalt alloy TiC-9ALC-5USCBN, including two groups of brackets, the top ends of the two groups of brackets are fixed with roller seats, a heating furnace is arranged between the brackets, an outer furnace tank is arranged on the outside of the heating furnace, a furnace cover is arranged on the top end of the outer furnace tank, rotating shafts are fixed on both sides of the bottom end of the outer furnace tank, the rotating shafts are arranged in the roller seats, a lifting assembly is fixed on the outside of the outer furnace tank, the output end of the lifting assembly is fixedly connected to a connecting frame, and one end of the connecting frame is fixedly connected to the side wall of the furnace cover.

[0016] Furthermore, a connecting plate is fixed to the outer side of the rotating shaft on one side, a side rod is fixed to the outer side of the connecting plate, an insulation block is arranged on the inner side of the outer furnace tank, and the insulation block is arranged on the outer side of the heating furnace.

[0017] Furthermore, one end of the rotating shaft is fixedly connected to the outer side wall of the outer furnace tank through a connecting frame.

[0018] Beneficial Effects

[0019] Compared with the known public technology, the technical solution provided by the present invention has the following beneficial effects:

[0020] The high-performance heat-resistant and wear-resistant alloy of the present invention has improved tensile strength and use temperature in terms of high-temperature wear resistance compared to the currently used heat-resistant steel. Due to the obvious improvement of the high-temperature wear resistance of the new material, it has the characteristics of both austenitic and ferritic stainless steels. Compared with other heat-resistant steels and stainless steels, it has higher plasticity and toughness, no room temperature brittleness, high temperature resistance, wear resistance, corrosion resistance and welding performance. At the same time, it also maintains the 1450℃ brittleness of ferritic stainless steel and high thermal conductivity, and has the characteristics of superplasticity, etc., which greatly increases the service life of the product, extends the manufacturer's use cycle, reduces the number of maintenance times, reduces the maintenance cost of the enterprise, and increases the economic benefits of the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 It is a schematic diagram of the furnace structure of the present invention;

[0023] Figure 2 It is a front view of the furnace structure of the present invention;

[0024] Figure 3This is a structural breakdown diagram of the outer furnace tank and the heating furnace of the present invention;

[0025] Figure 4 It is a structural flow chart of the present invention.

[0026] The numbers in the figure represent: 1. bracket; 11. roller seat; 12. connecting frame; 2. outer furnace tank; 21. rotating shaft; 22. insulation block; 3. lifting assembly; 31. connecting frame; 4. furnace cover; 5. side rod; 51. connecting plate; 6. heating furnace. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] The present invention will be further described below in conjunction with the embodiments.

[0029] Example 1: A preparation process of a titanium-cobalt alloy TiC-9ALC-5USCBN, such as Figure 4 As shown, it includes the following steps: S1: preparing alloy metal and pig iron powder; and coarsely filtering the alloy metal and pig iron powder to remove impurities; S2: weighing the raw materials of the formula; S3: mixing the raw materials of the formula evenly, grinding them to obtain product A, S4: adding the pig iron powder to a furnace to melt, S5: desulfurizing and deoxidizing the molten iron in S4, S6: adding the alloy metal to a crucible, smelting it once, and air cooling it after it is completely melted to obtain an intermediate alloy material B, S7: adding the intermediate alloy material B to the molten iron after step S5, alloying it, melting it, and refining it twice to obtain a rough ingot product C; S8: heating the rough ingot product C, melting it, and magnetically stirring it until it is uniform, letting it stand, casting it, and air cooling it after it is taken out of the furnace; heating it again, air cooling it to room temperature, and preparing a product titanium-cobalt alloy;

[0030] In step S1, the raw materials include pig iron powder, tungsten carbide, titanium carbide, cobalt powder, chromium carbide, rare earth metal powder, and copper-zinc composite powder. Among them, by weight, there are 60 parts of tungsten carbide, 11 parts of titanium carbide, 25 parts of cobalt powder, 1 part of chromium carbide, 1 part of rare earth metal powder, and 2 parts of copper-zinc composite powder, and the rare earth metal powder includes 0.5 parts of lanthanum, 0.5 parts of cerium, and 0.8 parts of niobium. In steps S5 and S7, refining agents need to be added thereto during desulfurization, deoxidation operations and secondary refining. The titanium-cobalt alloy is prepared by a casting molding process. In step S8, during the second heating stage, the temperature is 1000°C, kept warm for 5 minutes, and then air-cooled to room temperature. In the primary smelting in S6, the temperature reaches 1350°C.

[0031] Embodiment 2: A preparation device for a titanium-cobalt alloy TiC-9ALC-5USCBN, including a preparation process for a titanium-cobalt alloy TiC-9ALC-5USCBN, including two groups of brackets 1, the tops of the two groups of brackets 1 are fixed with roller seats 11, a heating furnace 6 is arranged between the brackets 1, an outer furnace tank 2 is arranged on the outside of the heating furnace 6, a furnace cover 4 is arranged on the top of the outer furnace tank 2, rotating shafts 21 are fixed on both sides of the bottom end of the outer furnace tank 2, the rotating shaft 21 is arranged in the roller seat 11, a lifting assembly 3 is fixed on the outside of the outer furnace tank 2, the output end of the lifting assembly 3 is fixedly connected to a connecting frame 31, one end of the connecting frame 31 is fixedly connected to the side wall of the furnace cover 4, and one side of the connecting frame 31 is fixedly connected to the side wall of the furnace cover 4. A connecting piece 51 is fixed to the outside of the rotating shaft 21, and a side rod 5 is fixed to the outside of the connecting piece 51. An insulation block 22 is arranged on the inner side of the outer furnace tank 2, and the insulation block 22 is arranged on the outside of the heating furnace 6; one end of the rotating shaft 21 is fixedly connected to the outer wall of the outer furnace tank 2 through a connecting frame 12. In the present device, due to the side rod 5-connecting piece 51 structure, the internal heating furnace 6 can be tilted outward, and the connecting frame 12-rotating shaft 21 structure arranged on the outside of the outer furnace tank 2 can be deflected around the roller seat 11 structure to tilt the internal liquid of the heating furnace 6 outward. Due to the lifting assembly 3 and the connecting frame 31 structure arranged in the present device, the furnace cover 4 can be pushed out to the top to realize the closing and opening functions.

[0032] Embodiment 3: A preparation process of a titanium-cobalt alloy TiC-9ALC-5USCBN, comprising the following steps: S1: preparing alloy metal and pig iron powder; and coarsely filtering the alloy metal and pig iron powder to remove impurities; S2: weighing the raw materials in the formula; S3: mixing the raw materials of the formula evenly, grinding them to obtain product A, S4: adding the pig iron powder into a furnace to melt, S5: desulfurizing and deoxidizing the molten iron in S4, S6: adding the alloy metal into a crucible, smelting it once, and air-cooling it after it is completely melted to obtain an intermediate alloy material B, S7: adding the intermediate alloy material B into the molten iron after step S5, alloying it, melting it, and refining it twice to obtain a rough ingot product C; S8: heating the rough ingot product C, melting it, and magnetically stirring it until it is uniform, letting it stand, casting it into an ingot, and air-cooling it after it is taken out of the furnace; heating it again, and air-cooling it to room temperature to prepare a product titanium-cobalt alloy.

[0033] In step S1, the raw materials include pig iron powder, tungsten carbide, titanium carbide, cobalt powder, chromium carbide, rare earth metal powder, and copper-zinc composite powder, wherein, by weight, there are 85 parts of tungsten carbide, 15 parts of titanium carbide, 30 parts of cobalt powder, 2 parts of chromium carbide, 2 parts of rare earth metal powder, and 8 parts of copper-zinc composite powder, and the rare earth metal powder includes 0.8 parts of lanthanum, 0.8 parts of cerium, and 1 part of niobium.

[0034] In steps S5 and S7, refining agents need to be added during the desulfurization, deoxidation operations and secondary refining; the titanium-cobalt alloy is prepared by a casting molding process; in step S8, during the second heating stage, the temperature is 1150°C, kept warm for 10 minutes, and then air-cooled to room temperature; in the first smelting in S6, the temperature reaches 1500°C; the heat-resistant temperature of the alloy material reaches 1500°C.

[0035] Embodiment 4: A preparation process of a titanium-cobalt alloy TiC-9ALC-5USCBN, comprising the following steps: S1: preparing alloy metal and pig iron powder; and coarsely filtering the alloy metal and pig iron powder to remove impurities; S2: weighing the raw materials in the formula; S3: mixing the raw materials of the formula evenly, grinding them to obtain product A, S4: adding the pig iron powder into a furnace to melt, S5: desulfurizing and deoxidizing the molten iron in S4, S6: adding the alloy metal into a crucible, smelting it once, and air-cooling it after it is completely melted to obtain an intermediate alloy material B, S7: adding the intermediate alloy material B into the molten iron after step S5, alloying it, melting it, and refining it twice to obtain a rough ingot product C; S8: heating the rough ingot product C, melting it, and magnetically stirring it until it is uniform, letting it stand, casting it into an ingot, and air-cooling it after it is taken out of the furnace; heating it again, and air-cooling it to room temperature to prepare a product titanium-cobalt alloy.

[0036] In step S1, the raw materials include pig iron powder, tungsten carbide, titanium carbide, cobalt powder, chromium carbide, rare earth metal powder, and copper-zinc composite powder. Among them, by weight, there are 50 parts of tungsten carbide, 8 parts of titanium carbide, 20 parts of cobalt powder, 6 parts of chromium carbide, 6 parts of rare earth metal powder, and 10 parts of copper-zinc composite powder, and the rare earth metal powder includes 1 part of lanthanum, 1 part of cerium, and 3 parts of niobium.

[0037] In steps S5 and S7, refining agents need to be added during the desulfurization, deoxidation operations and secondary refining; the titanium-cobalt alloy is prepared by a casting molding process; in step S8, during the second heating stage, the temperature is 1000°C, kept warm for 20 minutes, and then air-cooled to room temperature; in the first smelting in S6, the temperature reaches 1800°C; the temperature resistance of the alloy material reaches 2000°C.

[0038] Performance comparison:

[0039]

[0040] Table 1

[0041] The high-performance heat-resistant and wear-resistant alloy of the present invention has improved tensile strength and use temperature in terms of high-temperature wear resistance compared to the currently used heat-resistant steel. Due to the obvious improvement of the high-temperature wear resistance of the new material, it has the characteristics of both austenitic and ferritic stainless steels. Compared with other heat-resistant steels and stainless steels, it has higher plasticity and toughness, no room temperature brittleness, high temperature resistance, wear resistance, corrosion resistance and welding performance. At the same time, it also maintains the 1450℃ brittleness of ferritic stainless steel and high thermal conductivity, and has the characteristics of superplasticity, etc., which greatly increases the service life of the product, extends the manufacturer's use cycle, reduces the number of maintenance times, reduces the maintenance cost of the enterprise, and increases the economic benefits of the enterprise.

[0042] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A preparation process of titanium-cobalt alloy TiC-9ALC-5USCBN, characterized in that: The method comprises the following steps: S1: preparing alloy metal and pig iron powder; and coarsely filtering the alloy metal and pig iron powder to remove impurities; S2: weigh the raw materials of the formula; S3: mix the raw materials of the formula evenly and grind them to obtain product A; S4: add pig iron powder into the furnace to melt; S5: desulfurize and deoxidize the molten iron in S4; S6: add the alloy metal into the crucible and perform a smelting process. After it is completely melted, air-cool it to obtain an intermediate alloy material B; S7: add the intermediate alloy material B into the molten iron after step S5, perform alloying, melting, and perform secondary refining; obtain a rough ingot product C; S8: Heating the rough ingot product C, melting it and magnetically stirring it until it is uniform, letting it stand, casting it into an ingot, taking it out of the furnace and air cooling it; heating it again, air cooling it to room temperature, and preparing the product titanium-cobalt alloy.

2. The preparation process of a titanium-cobalt alloy TiC-9ALC-5USCBN according to claim 1, characterized in that: In step S1, the raw materials include pig iron powder, tungsten carbide, titanium carbide, cobalt powder, chromium carbide, rare earth metal powder, and copper-zinc composite powder, wherein, by weight, there are 60-85 parts of tungsten carbide, 11-15 parts of titanium carbide, 25-30 parts of cobalt powder, 1-2 parts of chromium carbide, 1-2 parts of rare earth metal powder, and 2-8 parts of copper-zinc composite powder, and the rare earth metal powder includes 0.5-0.8 parts of lanthanum, 0.5-0.8 parts of cerium, and 0.8-1 parts of niobium.

3. The preparation process of a titanium-cobalt alloy TiC-9ALC-5USCBN according to claim 1, characterized in that: In step S5 and step S7, refining agents need to be added during the desulfurization, deoxidation operations and secondary refining.

4. The preparation process of a titanium-cobalt alloy TiC-9ALC-5USCBN according to claim 1, characterized in that: The titanium-cobalt alloy is prepared by a casting process.

5. The preparation process of a titanium-cobalt alloy TiC-9ALC-5USCBN according to claim 4, characterized in that: In step S8, when heating up again, the temperature is 1000-1150°C, kept at this temperature for 5-10 minutes, and then air-cooled to room temperature.

6. The preparation process of a titanium-cobalt alloy TiC-9ALC-5USCBN according to claim 1, characterized in that: In the primary smelting in S6, the temperature reaches 1350-1500°C.

7. The preparation process of a titanium-cobalt alloy TiC-9ALC-5USCBN according to claim 1, characterized in that: The alloy material has a heat-resistant temperature of 1250-1500°C.

8. A preparation device for titanium-cobalt alloy TiC-9ALC-5USCBN, comprising a preparation process for titanium-cobalt alloy TiC-9ALC-5USCBN according to any one of claims 1 to 7, characterized in that: The invention comprises two groups of brackets (1), the top ends of the two groups of brackets (1) are fixed with roller seats (11), a heating furnace (6) is arranged between the brackets (1), an outer furnace tank (2) is arranged on the outer side of the heating furnace (6), a furnace cover (4) is arranged on the top end of the outer furnace tank (2), rotating shafts (21) are fixed on both sides of the bottom end of the outer furnace tank (2), the rotating shafts (21) are arranged in the roller seats (11), a lifting assembly (3) is fixed on the outer side of the outer furnace tank (2), the output end of the lifting assembly (3) is fixedly connected to a connecting frame (31), and one end of the connecting frame (31) is fixedly connected to the side wall of the furnace cover (4).

9. The preparation equipment of the titanium-cobalt alloy TiC-9ALC-5USCBN according to claim 8, characterized in that: A connecting piece (51) is fixed to the outside of the rotating shaft (21) on one side, a side rod (5) is fixed to the outside of the connecting piece (51), a heat preservation block (22) is arranged on the inside of the outer furnace tank (2), and the heat preservation block (22) is arranged on the outside of the heating furnace (6).

10. The preparation equipment of the titanium-cobalt alloy TiC-9ALC-5USCBN according to claim 8, characterized in that: One end of the rotating shaft (21) is fixedly connected to the outer side wall of the outer furnace tank (2) via a connecting frame (12).

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