High-oxidation-resistance glass mold and preparation method thereof

Abstract

The invention relates to the technical field of preparation of glass mold materials, in particular to a high-oxidation-resistance glass mold and a preparation method thereof. The die comprises the following chemical components in percentage by mass: 3.8-6.5% of Ni; 8.1% to 10.3% of Al; 3.2 to 5.4 percent of Co; less than 0.2% of Zn; less than 1.5% of Mn, and the balance Cu and inevitable impurities. During preparation, a continuous casting crystallizer is designed according to the appearance and size of a required glass mold, a cooling channel is arranged on the crystallizer, then the crystallizer is mounted on a production line, a secondary cooler is synchronously arranged at the crystallizer, and a tertiary cooler is arranged at the tail end of the crystallizer; the materials are weighed and smelted according to the formula of the die, then the materials are poured into a tundish from a casting ladle and then fed into a crystallizer to be crystallized and cooled, a dummy bar is drawn to obtain a profile, and the profile is subjected to quenching heat treatment and then cut according to the size to be machined. The prepared glass mold is excellent in performance, and the production efficiency and the product yield of the glass mold are improved while the service life of the glass mold is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of glass mold preparation, and particularly to a glass mold with high oxidation resistance and a preparation method thereof. Background Art

[0002] In the last century, cast iron materials have been widely used in the field of glass molds. Due to their low price and simple manufacturing method, they have become the mainstream materials for glass molds. As customers' requirements for the quantity and quality of formed bottles become more and more stringent, technicians have gradually developed other alloy materials such as copper alloys, nickel alloys, and superalloys, and the service life and quality of glass molds have gradually improved.

[0003] Copper alloy is a glass mold material with relatively excellent comprehensive performance. Usually, copper alloy materials are alloy materials composed of pure copper as the matrix and one or more other metal elements added. Due to their excellent ductility, corrosion resistance, thermal conductivity, and electrical conductivity, they are widely used in various industries such as pipelines, cables, mechanical manufacturing, and metallurgy.

[0004] Traditional glass mold casting methods generally use green sand molding or resin sand molding processes to manufacture sand molds for casting to obtain glass mold blanks. Technical information related to glass mold casting technology can be found in published patent documents. For example, in "A Method for Casting Glass Molds by Green Sand Single-Box Without Riser" disclosed in CN102581221A, this method first makes a positioning core, then makes a wooden template, and then molds with green sand, and removes the gating iron after casting to obtain a glass mold. The advantages are saving raw materials, improving the smoothness of the inner cavity surface and parting surface of the mold; reducing casting costs and having environmental protection. This method can cast glass molds with relatively stable forming quality, but the efficiency is relatively low and cannot meet the expectation of rapid delivery.

[0005] Another example is "A Glass Mold Iron Profile with Thermal Shock Fatigue Resistance and a Preparation Method Thereof" disclosed in CN113416886A. The metal matrix of the obtained profile is ferrite, and the density number and regularity of graphite balls are high. Therefore, the mold has high thermal shock fatigue resistance and a long service life. At the same time, the graphite diameter is very small, preventing pits from being generated on the inner surface of the mold cavity due to the oxidation of graphite, improving the surface quality of glass devices, and extending the service life of glass molds. However, compared with copper alloys, the comprehensive performance is far from satisfactory.

[0006] In summary, although the aforementioned CN102581221A has the advantage of low-cost production of glass mold blanks, it cannot meet the requirements of mass production at high speed and is difficult to meet the requirements of customers for rapid delivery. In the aforementioned CN113416886A, there is no description of how to ensure the quality control of cast iron profiles during the manufacturing process, and how to solve problems such as cracks and cracking that are prone to occur due to the generation of huge internal stresses during the drawing process of the profiles. In addition, how to deoxidize and remove impurities during the solidification process of molten iron to fully ensure the high quality of the mold cavity, and whether there are quality abnormalities such as air holes, cracks, and shrinkage cavities also need to be considered. Summary of the Invention

[0007] The object of the present invention is to provide a glass mold with high oxidation resistance and a preparation method thereof, which provides a glass mold with excellent performance, prolongs the service life of the glass mold, and improves the production efficiency and product yield of the glass mold.

[0008] To achieve the above object, the technical solution adopted by the present invention is: The first aspect of the present invention provides a glass mold with high oxidation resistance, and the forming and cooling method of the glass mold is three-stage cooling forming; The chemical composition of the glass mold is calculated by mass percentage as follows: Ni: 3.8 - 6.5%; Al: 8.1 - 10.3%; Co: 3.2 - 5.4%; Zn < 0.2%; Mn < 1.5%, and the rest are Cu and inevitable impurities.

[0009] The second aspect of the present invention provides a preparation method of a glass mold with high oxidation resistance, including the following steps: S1: Design a continuous casting mold according to the shape and size of the required glass mold, and a cooling channel is arranged on the continuous casting mold; S2: Install the continuous casting mold below the tundish of the continuous casting production line, and synchronously install a secondary cooler in the middle of the cooling channel. The secondary cooler is an atomizing nozzle, and a tertiary cooler is arranged at the end of the cooling channel, and the cooling method is water cooling; S3: Weigh and melt materials according to the chemical composition of the above glass mold to obtain a molten metal; S4: Pour the molten metal from the ladle into the tundish, and then send it from the tundish into the continuous casting mold for crystallization cooling, and then draw it by a dummy bar to obtain the glass mold; S5: Perform on-line quenching heat treatment on the glass mold, and then cut it according to the size requirements for machining.

[0010] Further, in step S1, the shape of the overflow port of the continuous casting mold is consistent with the cross-sectional shape of the glass mold.

[0011] Further, in step S1, the cooling medium in the cooling channel is high-speed quenching oil, and the cooling temperature after being cooled by the high-speed quenching oil is 500-600°C.

[0012] Further, in step S2, the cooling medium in the secondary cooler is a mixed solution of NaOH solution with a concentration of 10-15% and Na2CO3 solution with a concentration of 5-8%. The cooling temperature after being cooled by the secondary cooler is 80-110°C. The cooling medium in the tertiary cooler is water, and the temperature after being cooled by the tertiary cooler is room temperature.

[0013] Further, in step S3, the melting temperature is 1545-1620°C, and the tapping temperature of the molten metal is 1510-1525°C.

[0014] Further, in step S4, when pouring the molten metal from the ladle into the tundish, a refining flux is added to the tundish synchronously. The refining flux is used to purify the molten metal.

[0015] Further, the refining flux accounts for 0.5-1.5% of the weight of the molten metal. The refining flux is a mixture of NaF with a mass ratio of 20-30% and Na3AlF6 with a mass ratio of 70-80%.

[0016] Further, in step S5, the specific steps of the heat treatment include: quickly heating the glass mold online to 660-740°C, then cooling it to 200-250°C at a rate of 30-35°C / min through quenching oil, and then air-cooling it to room temperature.

[0017] Due to the application of the above technical solutions, the present invention has the following advantages compared with the prior art: For a high-oxidation-resistance glass mold provided by the present invention, the chemical components thereof are calculated by mass percentage as follows: Ni: 3.8-6.5%; Al: 8.1-10.3%; Co: 3.2-5.4%; Zn < 0.2%; Mn < 1.5%, and the rest are Cu and unavoidable impurities. Specifically, Cu has excellent physical, chemical, and mechanical properties; in the above composition formula, Co mainly plays a role in solid solution strengthening, improving the mechanical strength and stability after heat treatment of the copper alloy material. Its low content is sufficient to enhance the oxidation resistance and corrosion resistance of the alloy, especially showing excellent performance in some harsh high-temperature environments; Zn can significantly improve the machining performance of the copper alloy, improving the forgeability and plasticity of copper; Mn can refine grains, enhance oxidation resistance, improve mechanical strength, and improve wear resistance and corrosion resistance, etc.; Al can improve strength and corrosion resistance; Ni exhibits high strength and can improve oxidation resistance and corrosion resistance, and can further improve its thermal conductivity.

[0018] Furthermore, during the process of forming the copper alloy material through the mold, since it is a process of converting from liquid to solid, the copper alloy will generate great tensile force, extrusion force and other stresses during the drawing process. In the present invention, by cooling in three stages, different cooling media are selected, and different cooling temperature ranges are controlled, so as to well control the internal stress generated instantaneously during the forming of the profile, prevent heat accumulation, and avoid the excessive temperature gradient rapid cooling caused by the single water cooling method, resulting in cracking and deformation.

[0019] In addition, due to the good oxidation resistance of the copper base in the formula, and by quenching and heat treating the mold profile online to quickly cool it after heating, it instantaneously reaches a state of high hardness and strength. This process makes the crystal structure between the mold profiles dense, and the strengthening phases between grain boundaries and grain boundaries fuse with each other, thereby improving the wear resistance and corrosion resistance of the glass mold.

[0020] Moreover, due to the excellent thermal conductivity of copper, during the quenching and heat treatment process of the present invention, by precisely controlling its cooling rate to avoid cracking and deformation, the performance of the copper alloy is further optimized to meet the requirements of the customer for the glass mold to be used in the bottle making machine.

[0021] In addition, in the preparation method provided by the present invention, since a copper alloy refining flux is used during the process of pouring from the ladle to the tundish, it has the function of eliminating defects such as oxidation slag, non-metallic oxides and pores, and improves the yield rate of the profile. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Some specific embodiments of the present invention will be described in detail hereinafter with reference to the drawings in an exemplary but not restrictive manner. The same reference numerals in the drawings denote the same or similar components or parts. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings: Figure 1 is a schematic cross-sectional view of the overflow port of the continuous casting mold provided by the present invention; Figure 2 is a schematic structural view of the glass mold provided by the present invention; Figure 3 is a schematic view of the online heat treatment of the glass mold provided by the present invention; Figure 4 is a flow chart of the preparation method of the glass mold provided by the present invention; Among them, the reference numerals are as follows: 1. Continuous casting mold; 2. Overflow port; 3. Glass mold; 301. Hanging ear; 302. Male mold rib; 4. Heat treatment device. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative work fall within the scope of protection of the present invention.

[0024] In the present invention, a glass mold with high antioxidant properties is disclosed. The mold uses a copper alloy profile, which has certain advantages compared with cast iron materials. The thermal conductivity of the copper alloy is much higher than that of the cast iron mold material. The good heat dissipation can avoid the local instantaneous high temperature caused by mold deformation, thus avoiding defects such as cracking and deformation. At the same time, the copper alloy has the advantages of antioxidant property, thermal fatigue resistance, etc.

[0025] The chemical composition of the glass mold in the present invention is as follows by mass percentage: Ni: 3.8 - 6.5%; Al: 8.1 - 10.3%; Co: 3.2 - 5.4%; Zn < 0.2%; Mn < 1.5%, and the rest are Cu and inevitable impurities. Among them, Cu has excellent physical, chemical and mechanical properties; Co mainly plays a role in solid solution strengthening, improving the mechanical strength and stability after heat treatment of the copper alloy material. Its low content is sufficient to enhance the antioxidant property and corrosion resistance of the alloy, especially showing excellent performance in some harsh high-temperature environments; Zn can significantly improve the machining performance of the copper alloy, improving the forging and plasticity of copper; Mn can refine grains, enhance antioxidant properties, improve mechanical strength, and improve wear resistance and corrosion resistance, etc.; Al can improve strength and corrosion resistance; Ni exhibits high strength and can improve antioxidant and corrosion resistance, and can further improve its thermal conductivity.

[0026] In the embodiments of the present invention, the grade of Ni used is Ni9996; Mn is metal manganese block; the grade of Co is metal cobalt of No. 1; the grade of Al is Al99.90; the grade of Zn is Zn99.99; Cu is grade A cathode electrolytic copper of grade Cu-CATH-1.

[0027] In the present invention, a preparation method of a glass mold with high antioxidant properties is also disclosed. Refer to Figure 4 , and specifically includes the following steps: S1: Design a continuous casting mold according to the shape and size of the required glass mold, and a cooling channel is arranged on the continuous casting mold. S2: Install the continuous casting mold under the tundish of the continuous casting production line. At the same time, a secondary cooler is arranged in the middle of the cooling channel. The secondary cooler is an atomizing nozzle, and a tertiary cooler is arranged at the end of the cooling channel. The cooling method is water cooling. S3: Weigh and melt according to the chemical composition of the aforementioned glass mold to obtain a molten metal. S4: Pour the smelting liquid from the ladle into the tundish, and then send it from the tundish into the continuous casting mold for crystallization and cooling, and then draw it by the dummy bar to obtain the glass mold. S5: Perform on-line quenching heat treatment on the glass mold, and then cut it according to the dimensional requirements and wait for machining.

[0028] Specifically, in step S1, the shape of the overflow port of the continuous casting mold is the same as the cross-sectional shape of the glass mold. Refer to Figure 1 and Figure 2 . The shape of the overflow port 2 of the continuous casting mold 1 and the cross-sectional shape of the glass mold 3 can be adjusted according to actual production needs, and the size can also be adjusted accordingly. In the embodiment of the present invention, the glass mold 3 is a semi-cylindrical profile integrally connected with a hanging ear 301, and a male mold rib 302 is also provided on the end face of the profile.

[0029] In step S1, in the cooling channel of the continuous casting mold, the cooling medium introduced is high-speed quenching oil. The cooling temperature after cooling by the high-speed quenching oil is controlled at 500-600°C.

[0030] High-speed quenching oil can rapidly reduce the temperature of metal workpieces in a short time, thereby improving their hardness and strength. Compared with water quenching, quenching oil can provide a more uniform cooling rate, reduce the risk of thermal stress and deformation, and reduce the possibility of crack occurrence.

[0031] In addition, high-speed quenching oil has less evaporation loss under high-temperature action, which can effectively reduce material waste. The excellent lubricating performance of quenching oil can reduce friction, protect the surface of the workpiece, and reduce wear.

[0032] Nowadays, many high-speed quenching oils are added with rust inhibitors, which can effectively prevent the metal surface from rusting and oxidizing after quenching and have relatively high thermal stability.

[0033] In step S2, the cooling medium in the secondary cooler is configured as a mixed solution of a NaOH solution with a concentration of 10-15% and a Na2CO3 solution with a concentration of 5-8%. The cooling temperature after cooling by the secondary cooler is 80-110°C.

[0034] NaOH and Na2CO3 solutions have a high specific heat capacity, can effectively absorb the heat generated during the smelting process, reduce the temperature, improve the hardness of the profile, and enhance its wear resistance. In addition, NaOH is a strong base, which can increase the pH value of the coolant, while Na2CO3 is a weak base, which helps to moderate its alkalinity and ensure that the pH value of the coolant is within an appropriate range, helping to avoid corrosion of equipment and the environment.

[0035] In step S3, the melting temperature is controlled at 1545 - 1620 °C, and the tapping temperature of the molten metal is controlled at 1510 - 1525 °C.

[0036] In step S4, when pouring the molten metal from the ladle into the tundish, a refining flux needs to be added to the tundish synchronously to purify the molten metal. The feeding amount of the refining flux accounts for 0.5 - 1.5% of the weight percentage of the molten metal. In the embodiment of the present invention, the used refining flux is a mixture of 20 - 30% NaF and 70 - 80% Na3AlF6 by mass.

[0037] The mixture of NaF and Na3AlF6 has good fluidity in the molten state, which is beneficial to the full contact between the flux and the copper liquid. Through good contact, impurities in the copper liquid can be effectively adsorbed and removed. When the flux contacts the copper liquid, the components of the flux can better reduce the surface tension of the copper liquid, making the dross easier to be wrapped by the flux and float on the surface of the copper liquid. The presence of the flux makes the separation of impurities and copper easier.

[0038] In step S5, referring to Figure 3 , the specific steps of the heat treatment include: quickly heating the glass mold online to 660 - 740 °C, then cooling it to 200 - 250 °C at a rate of 30 - 35 °C / min by quenching in oil, and then air-cooling to room temperature. Through the above heat treatment method, the performance of the mold profile is further optimized.

[0039] The present invention is further illustrated by the following specific examples: Example 1 This example provides a highly oxidation-resistant glass mold and its preparation method. Among them, the chemical composition and its mass percentage of the mold profile are: 4.3% Ni, 8.6% Al, 3.7% Co, 0.1% Zn, and 1.1% Mn, and the rest are Cu and inevitable impurities.

[0040] The specific operation process includes the following steps: S1: Design a continuous casting mold according to the shape and size of the required glass mold, and a cooling channel is arranged on the continuous casting mold; S2: Install the continuous casting mold under the tundish of the continuous casting production line, and a secondary cooler is arranged in the middle of the cooling channel. The secondary cooler is an atomizing nozzle, and a tertiary cooler is arranged at the end of the cooling channel. The cooling method is water cooling; S3: Weigh electrolytic nickel, aluminum ingots, electrolytic manganese, metallic cobalt, electrolytic zinc, and electrolytic copper raw materials according to the proportion of the aforementioned mold profile composition. Put metallic cobalt, aluminum ingots, electrolytic manganese, and electrolytic nickel into the intermediate frequency induction furnace in sequence. After melting, add electrolytic copper and electrolytic zinc to smelt into molten copper. After sampling and analyzing that the composition is qualified, wait for pouring. The melting temperature is 1572 °C and the tapping temperature is 1516 °C. S4: Pour the molten copper into the ladle, and then transfer it to the mold through the tundish. Add refining flux to the tundish, accounting for 0.7% of the weight of the molten copper. The composition of the refining flux is 25% NaF and 75% Na3AlF6 by mass ratio. The molten copper is cooled for the first time by the mold. The temperature after the first cooling is 527 °C, and the cooling medium used is high-speed quenching oil. Then it is cooled for the second time by the secondary cooler. The way of the second cooling is atomization. The temperature after the second cooling is 93 °C, and the cooling medium used is a mixed solution of 14% NaOH solution and 8% Na2CO3 solution. Then it passes through the terminal tertiary cooler. The cooling medium is water, and it is cooled to room temperature, crystallized and solidified, and then drawn by the dummy bar to obtain the glass mold.

[0041] S5: Conduct on-line heat treatment on the glass mold. First, quickly heat it to 723 °C on-line, then cool it down to 236 °C at a rate of 31 °C / min through quenching oil cooling, and then air-cool it to room temperature, and cut it according to the size requirements, waiting for machining.

[0042] Example 2 This example provides a glass mold with high oxidation resistance and its preparation method. Among them, the chemical composition and its mass percentage of the mold profile are: 5.8% Ni, 9.3% Al, 5.1% Co, 0.2% Zn, and 1.4% Mn, and the rest are Cu and inevitable impurities.

[0043] The specific operation process includes the following steps: S1: Design a continuous casting mold according to the shape and size of the required glass mold. The continuous casting mold is provided with cooling channels. S2: Install the continuous casting mold under the tundish of the continuous casting production line, and synchronously set a secondary cooler in the cooling channel. The secondary cooler is an atomizing nozzle, and a tertiary cooler is set at the end of the cooling channel. The cooling method is water cooling. S3: Weigh electrolytic nickel, aluminum ingots, electrolytic manganese, metallic cobalt, electrolytic zinc, and electrolytic copper raw materials according to the proportion of the aforementioned mold profile composition. Put metallic cobalt, aluminum ingots, electrolytic manganese, and electrolytic nickel into the intermediate frequency induction furnace in sequence. After melting, add electrolytic copper and electrolytic zinc to smelt into molten copper. After sampling and analyzing that the composition is qualified, wait for pouring. The melting temperature is 1611 °C and the tapping temperature is 1520 °C. S4: Pour the molten copper into a ladle, and then transfer it to a mold through a tundish. Add a refining flux to the tundish, which accounts for 1.1% of the weight of the molten copper. The refining flux consists of 22% NaF and 78% Na3AlF6 by mass ratio; The molten copper is cooled once through the mold. The temperature after the first cooling is 586°C, and the cooling medium used is high-speed quenching oil. Then it is cooled twice through a secondary cooler. The secondary cooling method is atomization. The temperature after the secondary cooling is 101°C, and the cooling medium used is a mixed solution of 14% NaOH solution and 8% Na2CO3 solution. Then it passes through a final tertiary cooler. The cooling medium is water, and it is cooled to room temperature, crystallizes and solidifies, and is drawn by a dummy bar to obtain a glass mold.

[0044] S5: Conduct on-line heat treatment on the glass mold. First, quickly heat it up to 699°C on-line, then cool it down to 247°C at a rate of 35°C / min through quenching oil cooling, and then air-cool it to room temperature, cut it according to the size requirements, and wait for machining.

[0045] Example 3 This example provides a glass mold with high oxidation resistance and its preparation method. Among them, the chemical composition and its mass percentage of the mold profile are: 5.1% Ni, 9.0% Al, 4.3% Co, 0.1% Zn, and 1.2% Mn, and the rest are Cu and inevitable impurities.

[0046] The specific operation process includes the following steps: S1: Design a continuous casting mold according to the shape and size of the required glass mold. The continuous casting mold is provided with cooling channels; S2: Install the continuous casting mold under the tundish of the continuous casting production line. Synchronously, install a secondary cooler in the cooling channel. The secondary cooler is an atomizing nozzle, and a tertiary cooler is installed at the end of the cooling channel. The cooling method is water cooling; S3: Weigh electrolytic nickel, aluminum ingots, electrolytic manganese, metal cobalt, electrolytic zinc, and electrolytic copper raw materials according to the proportion of the aforementioned mold profile components. Put metal cobalt, aluminum ingots, electrolytic manganese, and electrolytic nickel into a medium-frequency induction furnace in turn. After melting, add electrolytic copper and electrolytic zinc, melt them into molten copper. After sampling and analyzing that the composition is qualified, wait for pouring. The melting temperature is 1560°C, and the tapping temperature is 1521°C; S4: Pour the molten copper into a ladle, and then transfer it to a mold through a tundish. Add a refining flux to the tundish, which accounts for 0.9% of the weight of the molten copper. The refining flux consists of 23% NaF and 77% Na3AlF6 by mass ratio; The molten copper is first cooled in a mold, and the temperature after the first cooling is 553 °C. The cooling medium used is high-speed quenching oil; then it is further cooled in a secondary cooler. The secondary cooling method is atomization, and the temperature after the secondary cooling is 98 °C. The cooling medium used is a mixed solution of NaOH solution with a concentration of 12% and Na2CO3 solution with a concentration of 6%. Then it passes through the terminal tertiary cooler, with water as the cooling medium, and is cooled to room temperature and crystallized and solidified. It is drawn by a dummy bar to obtain a glass mold.

[0047] S5: Conduct on-line heat treatment on the glass mold. First, quickly heat it up to 721 °C on-line, then cool it down to 209 °C at a rate of 33 °C / min through quenching oil cooling, and then air-cool it to room temperature, cut it according to the size requirements, and wait for machining.

[0048] Example 4 This example provides a high-oxidation-resistance glass mold and its preparation method. Among them, the chemical composition and its mass percentage of the mold profile are: 4.2% Ni, 9.7% Al, 3.2% Co, 0.2% Zn, and 1.0% Mn, and the rest are Cu and inevitable impurities.

[0049] The specific operation process includes the following steps: S1: Design a continuous casting mold according to the shape and size of the required glass mold. The continuous casting mold is provided with cooling channels; S2: Install the continuous casting mold under the tundish of the continuous casting production line. Synchronously, install a secondary cooler in the cooling channel. The secondary cooler is an atomizing nozzle, and a tertiary cooler is installed at the end of the cooling channel. The cooling method is water cooling; S3: Weigh electrolytic nickel, aluminum ingots, electrolytic manganese, metal cobalt, electrolytic zinc, and electrolytic copper raw materials according to the proportion of the aforementioned mold profile components. First, put metal cobalt, aluminum ingots, electrolytic manganese, and electrolytic nickel into the intermediate frequency induction furnace in sequence. After melting, add electrolytic copper and electrolytic zinc, and melt them into molten copper. After sampling and analyzing that the composition is qualified, wait for pouring. The melting temperature is 1618 °C, and the tapping temperature is 1511 °C; S4: Pour the molten copper into a ladle, and then transfer it to the mold through the tundish. Add a refining flux to the tundish, accounting for 1.4% of the weight of the molten copper. The composition of the refining flux is 18% NaF and 82% Na3AlF6 by mass ratio.

[0050] The molten copper is cooled for the first time through a mold, and the temperature after the first cooling is 586 °C. The cooling medium used is high-speed quenching oil; then it is cooled for the second time through a secondary cooler. The method of the second cooling is atomization, and the temperature after the second cooling is 103 °C. The cooling medium used is a mixed solution of a NaOH solution with a concentration of 12% and a Na₂CO₃ solution with a concentration of 6%. Then it passes through the final tertiary cooler, with water as the cooling medium, and is cooled to room temperature, crystallized and solidified, and is drawn by a dummy bar to obtain a glass mold.

[0051] S5: Conduct on-line heat treatment on the glass mold. First, quickly heat it to 701 °C on-line, then cool it down to 248 °C at a rate of 32 °C / min through quenching oil cooling, and then air-cool it to room temperature, and cut it according to the size requirements for machining.

[0052] Comparative Example 1 This example provides a glass mold and its preparation method. The difference from Example 1 is only that Ni is not added to the chemical composition of the glass mold.

[0053] Comparative Example 2 This example provides a glass mold and its preparation method. The difference from Example 1 is only that in step S5, the on-line quenching heat treatment process is not implemented for the glass mold.

[0054] Comparative Example 3 This example provides a glass mold and its preparation method. The difference from Example 1 is only that the glass mold is not subjected to secondary cooling and tertiary cooling.

[0055] Comparative Example 4 This example provides a glass mold and its preparation method. The difference from Example 1 is only that no refining agent is added to the tundish for the glass mold.

[0056] In the present invention, the products of Examples 1-4 and the products of Comparative Examples 1-4 are subjected to performance tests. The yield strength, hardness, and thermal conductivity are tested with reference to GB / T228-2010, GB / T 4340.1-2024, and ISO 22007-4. The results are shown in Table 1.

[0057] Table 1 Data table of relevant mechanical properties of each example and comparative example It can be seen from the above examples and comparative examples that since Co in the component formula mainly plays a role in solution strengthening, enhancing the mechanical strength and stability after heat treatment of the copper alloy material, its relatively low content is sufficient to enhance the oxidation resistance and corrosion resistance of the alloy, especially showing excellent performance in some harsh high-temperature environments; Zn can significantly improve the machining performance of the copper alloy, improving the forging and plasticity of copper, Mn can refine grains, enhance oxidation resistance, improve mechanical strength, wear resistance and corrosion resistance, etc.; Al can improve strength and corrosion resistance, Ni exhibits relatively high strength and can improve oxidation resistance and corrosion resistance, and further improve its thermal conductivity. Since the copper base in the formula has good oxidation resistance and is further heat-treated specially, the performance of the copper alloy is further optimized, thus meeting the requirements of glass molds for bottle making on the machine; the provided preparation method uses a copper alloy refining agent during the pouring process, which has the function of removing oxidation slag and slag, improving the finished product yield of the profile.

[0058] The above examples are only for illustrating the technical concept and characteristics of the present invention, and their purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it accordingly, and it cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A glass mold with high antioxidant property, characterized in that, The forming and cooling method of the glass mold is three-stage cooling forming; the chemical composition of the glass mold is as follows by mass percentage: Ni: 3.8 - 6.5%; Al: 8.1 - 10.3%; Co: 3.2 - 5.4%; Zn < 0.2%; Mn < 1.5%, and the rest is Cu and inevitable impurities.

2. The preparation method of a high antioxidant glass mold according to claim 1, characterized in that It includes the following steps: S1: Design a continuous casting mold according to the shape and size of the required glass mold, and a cooling channel is arranged on the continuous casting mold; S2: Install the continuous casting mold under the tundish of the continuous casting production line, and synchronously set a secondary cooler in the middle of the cooling channel. The secondary cooler is an atomizing nozzle, and a tertiary cooler is arranged at the end of the cooling channel. The cooling method is water cooling; S3: Weigh and melt according to the chemical composition of the glass mold described in Claim 1 to obtain a molten metal; S4: Pour the molten metal from the ladle into the tundish, and then send it from the tundish into the continuous casting mold for crystallization cooling, and then draw it by a dummy bar to obtain the glass mold; S5: Perform on-line quenching heat treatment on the glass mold, and then cut it according to the size requirements for machining.

3. The preparation method of a high antioxidant glass mold according to claim 2, characterized in that, In step S1, the shape of the overflow port of the continuous casting mold is the same as the cross-sectional shape of the glass mold.

4. The preparation method of a high antioxidant glass mold according to claim 2, characterized in that, In step S1, the cooling medium in the cooling channel is high-speed quenching oil, and the cooling temperature after being cooled by the high-speed quenching oil is 500 - 600 °C.

5. The preparation method of a high antioxidant glass mold according to claim 2, characterized in that, In step S2, the cooling medium in the secondary cooler is a mixed solution of a NaOH solution with a concentration of 10 - 15% and a Na2CO3 solution with a concentration of 5 - 8%. The cooling temperature after being cooled by the secondary cooler is 80 - 110 °C; the cooling medium in the tertiary cooler is water, and the temperature after being cooled by the tertiary cooler is room temperature.

6. The preparation method of a high antioxidant glass mold according to claim 2, characterized in that, In step S3, the melting temperature is 1545 - 1620 °C, and the tapping temperature of the molten metal is 1510 - 1525 °C.

7. The preparation method of a high antioxidant glass mold according to claim 2, characterized in that, In step S4, when pouring the molten metal from the ladle into the tundish, a refining flux is synchronously added to the tundish, and the refining flux is used to purify the molten metal.

8. The preparation method of a high antioxidant glass mold according to claim 7, characterized in that, The refining flux accounts for 0.5 - 1.5% of the weight percentage of the molten metal, and the refining flux is a mixture of NaF with a mass ratio of 20 - 30% and Na3AlF6 with a mass ratio of 70 - 80%.

9. The preparation method of a high antioxidant glass mold according to claim 2, characterized in that, In step S5, the specific steps of the on-line quenching heat treatment include: rapidly heating the glass mold on-line to 660 - 740 °C, then cooling it to 200 - 250 °C at a rate of 30 - 35 °C / min through quenching oil cooling, and then air-cooling to room temperature.

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