Nickel-based alloy and preparation method thereof, glass mold and preparation method and application thereof

Abstract

The invention belongs to the technical field of glass mold materials, and particularly relates to a nickel-based alloy and a preparation method thereof, a glass mold and a preparation method and application of the glass mold. The nickel-based alloy is prepared from the following raw material components in percentage by mass: 3.00 percent to 3.20 percent of Si, 2.05 percent to 2.30 percent of B, 0.04 percent to 0.05 percent of Fe, 0.021 percent to 0.035 percent of La, 0.02 percent to 0.03 percent of Al, 0.01 percent to 0.02 percent of Cr, 0.0018 percent to 0.0022 percent of C, 0.001 percent to 0.0015 percent of Cu and the balance of nickel and inevitable impurities. The nickel-based alloy provided by the invention has very high high temperature resistance and corrosion resistance. According to the preparation method of the nickel-based alloy, the nickel-based alloy prepared through twice three-stage heating and two-stage cooling treatment is high in density, and the hardness reaches 40 HRC to 47 HRC.

Description

Technical Field

[0001] The invention belongs to the technical field of glass mold materials, and in particular relates to a nickel-based alloy and a preparation method thereof, a glass mold and a preparation method and application thereof. Background Art

[0002] Existing glass mold materials generally include metal materials (such as cast iron, stainless steel, alloy steel), ceramic materials (such as silicon carbide), plastic materials (such as polyetheretherketone), graphite, silicone, rubber, etc. However, among metal materials, cast iron molds and stainless steel molds have poor thermal conductivity, and may overheat and stick during use; alloy steel has good strength and heat resistance, but it still has overheating and adhesion problems. Although ceramic materials have high high temperature resistance and chemical stability, they are brittle and prone to cracking during use; plastic materials, silicone and rubber have the advantages of light weight, good formability and low cost, but due to their poor high temperature resistance and wear resistance, they are easily deformed or damaged by high temperature during use; even though graphite has high thermal conductivity and easy processing, it is susceptible to mechanical damage and has a short service life. In the high temperature and high pressure glass molding process, graphite molds may be severely worn or deformed. Summary of the invention

[0003] To solve the above problems, the present invention provides a nickel-based alloy and a preparation method thereof, a glass mold and a preparation method thereof and application thereof. The nickel-based alloy has high high temperature resistance and corrosion resistance; the glass mold contains the nickel-based alloy and has high high temperature resistance, corrosion resistance and wear resistance.

[0004] The present invention is achieved through the following technical solutions:

[0005] One of the purposes of the present invention is to provide a nickel-based alloy, which is composed of the following raw material components in mass fractions:

[0006] Si: 3.00% ~ 3.20%, B: 2.05% ~ 2.30%, Fe: 0.04% ~ 0.05%, La: 0.021% ~ 0.035%, Al: 0.02% ~ 0.03%, Cr: 0.01% ~ 0.02%, C: 0.0018% ~ 0.0022%, Cu: 0.001% ~ 0.0015%, and the balance is nickel and unavoidable impurities.

[0007] A second object of the present invention is to provide a method for preparing the nickel-based alloy provided by the present invention, comprising the following steps:

[0008] Under an inert gas atmosphere, the mixed metal powder is melted to obtain a nickel-based alloy;

[0009] The mixed metal powder includes silicon powder, boron powder, iron powder, lanthanum powder, aluminum powder, chromium powder, carbon powder, copper powder and nickel powder.

[0010] As some possible implementations of the present invention, the melt processing comprises the following steps:

[0011] First melting and heat preservation: heating from room temperature to 1000℃~1200℃ at a heating rate of 10℃ / min~20℃ / min, and heat preservation for 0.5h~1h;

[0012] Second melting and heat preservation: heating from 1600℃~1700℃ to 1700℃~1750℃ at a heating rate of 25℃ / min~35℃ / min, and heat preservation for 1h~2h;

[0013] The third melting and heat preservation: heating from 1700°C to 1750°C to 2500°C to 3000°C at a heating rate of 45°C / min to 50°C / min, and heat preservation for 2h to 5h;

[0014] First cooling and heat preservation: cooling from 2500℃~3000℃ to 1000℃~1200℃ at a cooling rate of 55℃ / min~60℃ / min, and heat preservation for 0.5h~1.5h;

[0015] Second cooling and heat preservation: cooling from 1000℃~1200℃ to room temperature at a cooling rate of 5℃ / min~10℃ / min;

[0016] The ingot is turned over, and the first melting and heat preservation, the second melting and heat preservation, the third melting and heat preservation, the first cooling and heat preservation, and the second cooling and heat preservation are repeated to obtain the nickel-based alloy.

[0017] A third object of the present invention is to provide a glass mold, comprising a mold body, wherein the mold body material comprises the nickel-based alloy provided by the present invention.

[0018] As some possible implementations of the present invention, the glass mold further includes a wear-resistant layer coated on the surface of the mold body;

[0019] The wear-resistant layer material includes a high entropy alloy;

[0020] The metal raw materials of the high entropy alloy include five or more of iron, aluminum, chromium, copper, nickel, titanium and magnesium.

[0021] As some possible implementations of the present invention, the thickness of the wear-resistant layer is 120 μm to 345 μm.

[0022] A fourth object of the present invention is to provide a method for preparing a glass mold provided by the present invention, comprising the following steps:

[0023] The nickel-based alloy is made into a glass mold body.

[0024] As some possible implementations of the present invention, the preparation method further includes the steps of preparing the wear-resistant layer:

[0025] After spraying the wear-resistant layer spray coating onto the surface of the glass mold body, remelting the coating and then heat-insulating the coating to obtain the wear-resistant layer;

[0026] The wear-resistant layer spray coating comprises high entropy alloy metal raw powder;

[0027] The high entropy alloy metal raw powder includes a mixture of five or more metal powders of iron, aluminum, chromium, copper, nickel, titanium and magnesium.

[0028] As some possible implementations of the present invention, the spraying is plasma spraying.

[0029] As some possible implementations of the present invention, the remelting temperature is 1200°C to 1300°C.

[0030] As some possible implementations of the present invention, the insulation temperature is 1200° C. to 1300° C., and the insulation time is 1 h to 2 h.

[0031] A fifth object of the present invention is to provide an application of the nickel-based alloy provided by the present invention or the glass mold provided by the present invention in the field of mold manufacturing.

[0032] The nickel-based alloy and its preparation method, glass mold and its preparation method provided by the present invention have at least the following beneficial technical effects compared with the prior art:

[0033] (1) The nickel-based alloy provided by the present invention has high high temperature resistance and corrosion resistance.

[0034] (2) The method for preparing the nickel-based alloy provided by the present invention adopts the nickel-based alloy raw material provided by the present invention, and undergoes two three-stage heating and two-stage cooling treatments, so that the prepared nickel-based alloy has high density and a hardness of 40HRC to 47HRC.

[0035] (3) The glass mold provided by the present invention adopts the nickel-based alloy provided by the present invention, so the glass mold has high hardness, high temperature resistance and corrosion resistance.

[0036] (4) The glass mold provided by the present invention also has a high entropy alloy wear-resistant layer on the surface, which makes it have high wear resistance.

[0037] (5) The preparation method of the glass mold provided by the present invention comprises spraying a high entropy alloy onto the surface of the mold body, performing a remelting treatment and then keeping the mold warm, so that the high entropy alloy and the mold surface are metallurgically bonded, which not only improves the wear resistance of the glass mold, but also improves its hardness and corrosion resistance; and after the wear-resistant layer is sprayed on the surface, mechanical damage can be reduced, thereby extending the service life of the glass mold. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is described and illustrated in conjunction with the embodiments below. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Based on the embodiments provided by the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0039] Obviously, the following descriptions are only some examples or embodiments of the present invention, and for those of ordinary skill in the art, the present invention can also be applied to other similar scenarios without creative work. In addition, it can also be understood that although the efforts made in such a development process may be complex and lengthy, for those of ordinary skill in the art related to the contents disclosed in the present invention, some changes in design, manufacturing or production based on the technical contents disclosed in the present invention are just conventional technical means, and should not be understood as the contents disclosed in the present invention being insufficient.

[0040] However, unnecessary detailed descriptions may be omitted. For example, detailed descriptions of well-known matters and repeated descriptions of substantially the same structures may be omitted. This is to avoid the following description from becoming unnecessarily lengthy and to facilitate understanding by those skilled in the art. In addition, the following description is provided for those skilled in the art to fully understand the present invention and is not intended to limit the subject matter described in the claims.

[0041] If not otherwise specified, all embodiments and optional embodiments of the present invention may be combined with each other to form a new technical solution, and all technical features and optional technical features of the present invention may be combined with each other to form a new technical solution.

[0042] The following is a detailed description of a nickel-based alloy and a preparation method thereof, a glass mold and a preparation method and application thereof in embodiments of the present invention.

[0043]

Nickel-based alloy

[0044] A first aspect of an embodiment of the present invention provides a nickel-based alloy, which is composed of the following raw material components in mass fractions:

[0045] Si: 3.00% ~ 3.20%, B: 2.05% ~ 2.30%, Fe: 0.04% ~ 0.05%, La: 0.021% ~ 0.035%, Al: 0.02% ~ 0.03%, Cr: 0.01% ~ 0.02%, C: 0.0018% ~ 0.0022%, Cu: 0.001% ~ 0.0015%, and the balance is nickel and unavoidable impurities.

[0046] In the nickel-based alloy provided by the embodiment of the present invention, silicon is used to improve the fatigue resistance, wear resistance, and overall strength and hardness of the alloy; the BC compound formed by boron and carbon can enhance the strength and hardness of the nickel-based alloy; iron can enhance the strength of the nickel-based alloy and improve the corrosion resistance; lanthanum is used to improve the thermal corrosion resistance of the nickel-based alloy; aluminum can react with nickel to form Ni3Al phase, which serves as a strengthening phase to improve the strength of the alloy; chromium can increase the grain boundary strength and interface energy of the alloy, thereby resisting grain boundary relaxation and deformation, and improving the high temperature strength of the alloy; copper can enhance the mechanical strength and toughness of the nickel-based alloy under high stress and high temperature environment. The nickel-based alloy provided by the embodiment of the present invention has high high temperature resistance, corrosion resistance and mechanical strength.

[0047] In some embodiments, the nickel-based alloy has a yield strength of 853 MPa to 917 MPa.

[0048] [A method for preparing a nickel-based alloy]

[0049] A second aspect of an embodiment of the present invention provides a method for preparing a nickel-based alloy provided by an embodiment of the present invention, comprising the following steps:

[0050] S1. Under an inert gas atmosphere, the mixed metal powder is melt-treated to obtain a nickel-based alloy;

[0051] The mixed metal powder includes silicon powder, boron powder, iron powder, lanthanum powder, aluminum powder, chromium powder, carbon powder, copper powder and nickel powder.

[0052] The method for preparing the nickel-based alloy provided in the embodiment of the present invention can improve the purity of the alloy, reduce metal oxidation, and improve the mechanical strength and corrosion resistance of the nickel-based alloy by melting under an inert atmosphere.

[0053] In some embodiments, in the above step S1, the inert gas includes at least one of helium, neon, and argon.

[0054] In some embodiments, in the above step S1, the average particle size of the mixed metal powder is 80 μm to 120 μm.

[0055] In some embodiments, in the above step S1, the melt processing includes the following steps:

[0056] S101. First melting and heat preservation: heating from room temperature to 900°C to 950°C at a heating rate of 10°C / min to 20°C / min, and heat preservation for 0.5h to 1h.

[0057] S102. Second melting and heat preservation: heat from 900°C to 950°C to 1000°C to 1250°C at a heating rate of 25°C / min to 35°C / min, and keep warm for 1h to 2h.

[0058] S103. The third melting and heat preservation: heating from 1000°C to 1250°C to 1300°C to 1410°C at a heating rate of 45°C / min to 50°C / min, and heat preservation for 2h to 5h.

[0059] S104. First cooling and heat preservation: cool from 1300°C to 1410°C to 850°C to 950°C at a cooling rate of 55°C / min to 60°C / min, and keep warm for 0.5h to 1.5h.

[0060] S105. Second cooling and heat preservation: cooling from 850°C to 950°C to room temperature at a cooling rate of 5°C / min to 10°C / min.

[0061] S106. Turn the ingot over, repeat the first melting and heat preservation, the second melting and heat preservation, the third melting and heat preservation, the first cooling and heat preservation, and the second cooling and heat preservation to obtain a nickel-based alloy.

[0062] In the above-mentioned melting treatment, the nickel-based alloy raw material provided by the embodiment of the present invention is used, and the first melting and heat preservation, the second melting and heat preservation, the third melting and heat preservation, the first cooling and heat preservation and the second cooling and heat preservation are carried out in stages, and repeated, which can gradually promote the phase change combination of each metal, and can reduce the smelting to obtain a nickel-based alloy with fine grains and uniform composition. The first melting and heat preservation, the second melting and heat preservation, and the third melting and heat preservation promote the melting point metal to gradually melt at a temperature lower than its own melting point, thereby reducing the melting temperature; the first cooling and heat preservation quickly reduces the alloy to below 1000°C, which can inhibit the formation of precipitation phases, retain uniform structure at high temperature, and improve the mechanical properties of the alloy; the second cooling and heat preservation makes the precipitation phase in the alloy uniformly precipitate and refines the grains, thereby improving the high temperature resistance, corrosion resistance and mechanical strength of the alloy; the prepared nickel-based alloy has high density and a hardness of 40HRC~47HRC.

[0063] In some embodiments, in the above step S1, an arc melting furnace is used for melting treatment. It should be noted that the arc melting furnace is an existing device and is not particularly limited in the embodiments of the present invention, but as an example, the arc melting furnace can be a VAF-300 vacuum arc melting furnace.

[0064] In some embodiments, a method for preparing a nickel-based alloy is provided, comprising the following steps:

[0065] S10. In the arc melting furnace, after evacuating to negative pressure, inert gas is introduced to form an inert gas atmosphere.

[0066] S20. Melting the mixed metal powder to obtain a nickel-based alloy.

[0067]

Glass mold

[0068] The third purpose of the embodiment of the present invention is to provide a glass mold, including a mold body, and the mold body material includes the nickel-based alloy provided by the embodiment of the present invention.

[0069] The glass mold provided in the embodiment of the present invention adopts the nickel-based alloy provided in the embodiment of the present invention, so the glass mold has high hardness, high temperature resistance and corrosion resistance. It should be noted that the structure of the glass mold provided in the embodiment of the present invention is the same as the existing structure, which does not belong to the invention point of the embodiment of the present invention, and is therefore not described in detail in the embodiment of the present invention.

[0070] In some embodiments, the glass mold further comprises a wear-resistant layer coated on the surface of the mold body;

[0071] The wear-resistant layer material includes a high entropy alloy;

[0072] The metal raw materials of high entropy alloys include five or more of iron, aluminum, chromium, copper, nickel, titanium and magnesium.

[0073] In some embodiments, the metal raw material of the high entropy alloy consists of the following components in atomic percentage:

[0074] Iron: 14% to 22%, aluminum 12% to 23%, chromium 10% to 25%, copper 8% to 15% and nickel 20% to 30%.

[0075] In this case, the metal raw materials of the high-entropy alloy are the same as the metal components in the nickel-based alloy, and the metallurgical bonding is tighter and less likely to fall off.

[0076] In some embodiments, the thickness of the wear-resistant layer is 120 μm to 345 μm. In an exemplary embodiment, the thickness can be 120 μm, 220 μm, 345 μm, or any other typical but non-limiting thickness or a range between any two thicknesses. In this case, the wear-resistant layer has high wear resistance at an extremely thin thickness, thereby improving the service life of the glass mold.

[0077] In some embodiments, a glass mold is provided, which is composed of a mold body and a wear-resistant layer; the wear-resistant layer is coated on the surface of the mold body.

[0078] [A method for preparing a glass mold]

[0079] A fourth aspect of the embodiments of the present invention provides a method for preparing a glass mold provided by an embodiment of the present invention, comprising the following steps:

[0080] X01. Make the glass mold body out of nickel-based alloy.

[0081] In some embodiments, the preparation method further comprises:

[0082] X02. Preparation of the wear-resistant layer: After the wear-resistant layer spray coating is sprayed onto the surface of the glass mold body, it is remelted and heat-insulated to obtain a wear-resistant layer;

[0083] The wear-resistant layer spray coating includes high entropy alloy metal raw powder;

[0084] The raw metal powder of high entropy alloy includes a mixture of five or more metal powders of iron, aluminum, chromium, copper, nickel, titanium and magnesium. In this case, the high entropy alloy is sprayed onto the surface of the mold body, and then remelted and kept warm, so that the high entropy alloy and the mold surface are metallurgically bonded, which not only improves the wear resistance of the glass mold, but also improves its hardness and corrosion resistance; and after the wear-resistant layer is sprayed on the surface, mechanical damage can be reduced, extending the service life of the glass mold.

[0085] In some embodiments, in the above step X02, the spraying is plasma spraying.

[0086] In some embodiments, in the above step X02, the step of spraying the wear-resistant layer spray coating onto the surface of the glass mold body includes:

[0087] X020. Preheat the glass mold body to 100℃~120℃ at a heating rate of 10℃ / s~20℃ / s for 10min~20min.

[0088] X021. Spray the wear-resistant layer spray paint onto the surface of the glass mold body by plasma spraying.

[0089] It should be noted that the plasma spraying device is an existing device and is not particularly limited in the embodiments of the present invention. However, as an example, the plasma spraying device model may be DH-2080 plasma spraying equipment (Shanghai Ruifa Spraying Machinery Co., Ltd.).

[0090] In some embodiments, in the above step X021, the spraying distance of plasma spraying is 70 mm to 100 mm.

[0091] In some embodiments, in the above step X021, the flame velocity of the plasma spraying is 420 m / s to 500 m / s.

[0092] In some embodiments, in the above step X021, the impact velocity of the plasma sprayed powder is 350 m / s to 400 m / s.

[0093] In some embodiments, in the above step X02, the remelting temperature is 1200° C. to 1300° C., and the holding time is 1 h to 2 h.

[0094] In some embodiments, a method for preparing a glass mold is provided, comprising the following steps:

[0095] X10. Make the glass mold body into a nickel-based alloy.

[0096] X20. Preparation of wear-resistant layer: After spraying the wear-resistant layer spray paint onto the surface of the glass mold body, remelting treatment is carried out and heat preservation is carried out to obtain the wear-resistant layer.

[0097] The following is further described in conjunction with specific embodiments.

[0098] Example 1

[0099] Example 1 provides a nickel-based alloy consisting of the following raw material components in mass fractions: Si: 3.17%, B: 2.21%, Fe: 0.047%, La: 0.032%, Al: 0.03%, Cr: 0.02%, C: 0.002%, Cu: 0.0015%, and the remainder is nickel and unavoidable impurities.

[0100] This embodiment also provides a method for preparing the nickel-based alloy provided in this embodiment, the steps are as follows:

[0101] S1-10. The raw materials silicon powder, boron powder, iron powder, lanthanum powder, aluminum powder, chromium powder, carbon powder, copper powder and nickel powder are mixed and ground to obtain a mixed metal powder with an average particle size of 100 μm.

[0102] S1-20. Place the mixed metal powder in an arc melting furnace, evacuate to negative pressure, and then introduce an inert gas atmosphere.

[0103] S1-30. The mixed metal powder is melt-treated as follows to obtain a nickel-based alloy:

[0104] S1-301. First melting and heat preservation: heat from room temperature to 900°C at a heating rate of 15°C / min and keep warm for 1h.

[0105] S1-302. Second melting and heat preservation: heat from 900°C to 1000°C at a heating rate of 30°C / min and keep warm for 1h.

[0106] S1-303. Third melting and heat preservation: heat from 1000°C to 1300°C at a heating rate of 45°C / min and keep warm for 4h.

[0107] S1-304. First cooling and heat preservation: cool from 1300°C to 900°C at a cooling rate of 60°C / min and keep warm for 1h.

[0108] S1-305. Second cooling and heat preservation: cool from 900°C to room temperature at a cooling rate of 5°C / min.

[0109] S1-306. Turn over the ingot and repeat steps S1-301 to S1-305.

[0110] This embodiment also provides a glass mold, and the mold body material is the nickel-based alloy provided in this embodiment.

[0111] Example 2

[0112] Embodiment 2 provides a nickel-based alloy, which is composed of the following components by mass fraction:

[0113] Si: 3.00%, B: 2.05%, Fe: 0.04%, La: 0.021%, Al: 0.02%, Cr: 0.01%, C: 0.0018%, Cu: 0.001%, and the balance is nickel and inevitable impurities.

[0114] This embodiment also provides a method for preparing the nickel-based alloy provided in this embodiment, and the steps are basically the same as those in Example 1, except that:

[0115] S1-30. The mixed metal powder is melt-treated as follows to obtain a nickel-based alloy:

[0116] S1-301. First melting and heat preservation: heat from room temperature to 950°C at a heating rate of 20°C / min and keep warm for 0.5h.

[0117] S1-302. Second melting and heat preservation: heat from 950°C to 1250°C at a heating rate of 35°C / min and keep warm for 1.5h.

[0118] S1-303. Third melting and heat preservation: heat from 1250°C to 1410°C at a heating rate of 50°C / min and keep warm for 2h.

[0119] S1-304. First cooling and heat preservation: cool from 1410℃ to 950℃ at a cooling rate of 60℃ / min and keep warm for 0.5h.

[0120] S1-305. Second cooling and heat preservation: cool from 950°C to room temperature at a cooling rate of 10°C / min.

[0121] S1-306. Turn over the ingot and repeat steps S1-301 to S1-305.

[0122] This embodiment also provides a glass mold, and the mold body material is the nickel-based alloy provided in this embodiment.

[0123] Example 3

[0124] Embodiment 3 provides a nickel-based alloy, which is composed of the following components by mass fraction:

[0125] Si: 3.20%, B: 2.30%, Fe: 0.05%, La: 0.035%, Al: 0.03%, Cr: 0.02%, C: 0.0022%, Cu: 0.0015%, and the balance is nickel and inevitable impurities.

[0126] This embodiment also provides a method for preparing the nickel-based alloy provided in this embodiment, and the steps are basically the same as those in Example 1, except that:

[0127] S1-30. The mixed metal powder is melt-treated as follows to obtain a nickel-based alloy:

[0128] S1-301. First melting and heat preservation: heat from room temperature to 930°C at a heating rate of 10°C / min and keep warm for 0.8h.

[0129] S1-302. Second melting and heat preservation: heat from 930°C to 1200°C at a heating rate of 25°C / min and keep warm for 2h.

[0130] S1-303. Third melting and heat preservation: heat from 1200°C to 1350°C at a heating rate of 45°C / min and keep warm for 3h.

[0131] S1-304. First cooling and heat preservation: cool from 1350℃ to 850℃ at a cooling rate of 55℃ / min and keep warm for 1.5h.

[0132] S1-305. Second cooling and heat preservation: cool from 850°C to room temperature at a cooling rate of 5°C / min.

[0133] S1-306. Turn over the ingot and repeat steps S1-301 to S1-305.

[0134] This embodiment also provides a glass mold, and the mold body material is the nickel-based alloy provided in this embodiment.

[0135] Example 4

[0136] Embodiment 4 provides a nickel-based alloy, which is composed of the following components by mass fraction:

[0137] Si: 3.17%, B: 2.21%, Fe: 0.047%, La: 0.028%, Al: 0.03%, Cr: 0.02%, C: 0.002%, Cu: 0.0015%, and the balance is nickel and inevitable impurities.

[0138] This embodiment also provides a method for preparing the nickel-based alloy provided in this embodiment, and the steps are basically the same as those in Example 1, except that:

[0139] S1-30. The mixed metal powder is melt-treated as follows to obtain a nickel-based alloy:

[0140] S1-301. First melting and heat preservation: heat from room temperature to 900°C at a heating rate of 20°C / min and keep warm for 1h.

[0141] S1-302. Second melting and heat preservation: heat from 900°C to 1150°C at a heating rate of 35°C / min and keep warm for 1h.

[0142] S1-303. Third melting and heat preservation: heat from 1150°C to 1300°C at a heating rate of 45°C / min and keep warm for 5 hours.

[0143] S1-304. First cooling and heat preservation: cool from 1300°C to 890°C at a cooling rate of 60°C / min and keep warm for 1.5h.

[0144] S1-305. Second cooling and heat preservation: cool from 890°C to room temperature at a cooling rate of 5°C / min.

[0145] S1-306. Turn over the ingot and repeat steps S1-301 to S1-305.

[0146] This embodiment also provides a glass mold, which is composed of a mold body and a wear-resistant layer; the mold body material is the nickel-based alloy provided in this embodiment;

[0147] The wear-resistant layer material is a high entropy alloy composed of the following atomic percentage components:

[0148] Iron: 20%, Aluminum 25%, Chromium 20%, Copper 10% and Nickel 25%.

[0149] This embodiment also provides a method for preparing a glass mold, the steps are as follows:

[0150] X4-01. Make the glass mold body out of nickel-based alloy.

[0151] X4-02. Preparation of wear-resistant layer:

[0152] X4-021. Preheat the glass mold body to 100°C at a heating rate of 15°C / s for 20 minutes.

[0153] X4-022. The wear-resistant layer spray coating is sprayed onto the surface of the glass mold body by plasma spraying; wherein, the spraying distance is 80mm, the flame flow speed is 450m / s, the powder impact speed is 380m / s, and the spraying thickness is 300μm.

[0154] X4-023. Remelt the sprayed glass mold at 1200℃ and keep it warm for 2 hours.

[0155] Example 5

[0156] Example 5 provides a nickel-based alloy and a preparation method thereof that are the same as Example 4.

[0157] This embodiment also provides a glass mold, which is composed of a mold body and a wear-resistant layer; the mold body material is the nickel-based alloy provided in this embodiment;

[0158] The wear-resistant layer material is a high entropy alloy composed of the following atomic percentage components:

[0159] Iron: 22%, aluminum 20%, chromium 20%, copper 15% and nickel 23%.

[0160] This embodiment also provides a method for preparing a glass mold, and the steps are basically the same as those in Embodiment 4, except that:

[0161] X4-022. The wear-resistant layer spray coating is sprayed onto the surface of the glass mold body by plasma spraying; wherein, the spraying distance is 100 mm, the flame flow speed is 500 m / s, the powder impact speed is 400 m / s, and the spraying thickness is 150 μm.

[0162] X4-023. Remelt the sprayed glass mold at 1300℃ and keep it warm for 1 hour.

[0163] Example 6

[0164] Example 6 provides a nickel-based alloy and a preparation method thereof that are the same as those of Example 4.

[0165] This embodiment also provides a glass mold, which is composed of a mold body and a wear-resistant layer; the mold body material is the nickel-based alloy provided in this embodiment;

[0166] The wear-resistant layer material is a high entropy alloy composed of the following atomic percentage components:

[0167] Iron: 22%, aluminum 23%, chromium 25%, copper 8% and nickel 22%.

[0168] This embodiment also provides a method for preparing a glass mold, and the steps are basically the same as those in Embodiment 4, except that:

[0169] X4-022. The wear-resistant layer spray coating is sprayed onto the surface of the glass mold body by plasma spraying; wherein, the spraying distance is 70mm, the flame flow speed is 420m / s, the powder impact speed is 350m / s, and the spraying thickness is 200μm.

[0170] X4-023. Remelt the sprayed glass mold at 1300℃ and keep it warm for 2 hours.

[0171] Comparative Example 1

[0172] Comparative Example 1 provides a nickel-based alloy consisting of the following raw material components by mass fraction:

[0173] Si: 3.17%, B: 2.21%, Fe: 0.047%, Cr: 0.02%, C: 0.002%, Cu: 0.0015%, and the balance is nickel and inevitable impurities.

[0174] Comparative Example 1 also provides a method for preparing the nickel-based alloy provided in this embodiment, and the steps are as follows:

[0175] D1-10. The raw materials silicon powder, boron powder, iron powder, lanthanum powder, aluminum powder, chromium powder, carbon powder, copper powder and nickel powder are mixed and ground to obtain a mixed metal powder with an average particle size of 100 μm.

[0176] D1-20. Place the mixed metal powder in an arc melting furnace, evacuate to negative pressure and then introduce an inert gas atmosphere.

[0177] D1-30. Heat the mixed metal powder from room temperature to 3000°C at a heating rate of 45°C / min and keep it at that temperature for 4 hours.

[0178] D1-40. Cool from 3000℃ to room temperature at a cooling rate of 5℃ / min.

[0179] D1-50. Turn the ingot over and repeat steps D1-30 and D1-40 to obtain a nickel-based alloy.

[0180] In order to verify the progressiveness of the nickel-based alloy and its preparation method, the glass mold and its preparation method in the embodiment of the present invention, the nickel-based alloy or glass mold provided in the embodiment and the comparative example was tested: ① the yield strength of the nickel-based alloy was tested according to the standard GB / T228.1 "Methods for testing tensile properties of metal materials"; ② the mass loss of the glass mold in a high temperature environment of 70°C was tested according to the copper accelerated acetic acid salt spray test (CASS) in the standard GB / T 10125 "Artificial atmosphere corrosion test salt spray test"; ③ the hardness of the nickel-based alloy was tested by the Rockwell hardness method. The results are shown in Table 1 below.

[0181] Table 1

[0182] Yield strength(MPa) Mass loss (ppm) HRC Example 1 890 0.013 45 Example 2 917 0.01 40 Example 3 886 0.02 43 Example 4 893 0.012 47 Example 5 894 0.008 46 Example 6 897 0.0055 47 Comparative Example 1 910 100 38

[0183] From Table 1 above, at least the following conclusions can be drawn:

[0184] (1) The nickel-based alloy provided in the embodiment of the present invention has high high temperature resistance and corrosion resistance.

[0185] (2) The method for preparing the nickel-based alloy provided in the embodiment of the present invention is subjected to two three-stage heating and two-stage cooling treatments. The prepared nickel-based alloy has high density and a hardness of 40HRC to 47HRC.

[0186] (3) The glass mold provided in the embodiment of the present invention adopts the nickel-based alloy provided in the embodiment of the present invention. Therefore, the glass mold has high hardness, high temperature resistance and corrosion resistance, and the yield strength reaches 886MPa to 917MPa.

[0187] (4) The glass mold provided in the embodiment of the present invention also has a high entropy alloy wear-resistant layer on the surface, so that it has high wear resistance.

[0188] (5) The preparation method of the glass mold provided in the embodiment of the present invention sprays the high entropy alloy onto the surface of the mold body, performs a remelting treatment and then keeps it warm, so that the high entropy alloy and the mold surface are metallurgically bonded, which not only improves the wear resistance of the glass mold, but also improves its hardness and corrosion resistance; and after the wear-resistant layer is sprayed on the surface, mechanical damage can be reduced, thereby extending the service life of the glass mold.

[0189] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A nickel-based alloy, characterized in that: It is composed of the following raw material components by mass fraction: Si: 3.00% ~ 3.20%, B: 2.05% ~ 2.30%, Fe: 0.04% ~ 0.05%, La: 0.021% ~ 0.035%, Al: 0.02% ~ 0.03%, Cr: 0.01% ~ 0.02%, C: 0.0018% ~ 0.0022%, Cu: 0.001% ~ 0.0015%, and the balance is nickel and unavoidable impurities.

2. A method for preparing a nickel-based alloy as claimed in claim 1, characterized in that: The steps include: Under an inert gas atmosphere, the mixed metal powder is melted to obtain a nickel-based alloy; The mixed metal powder includes silicon powder, boron powder, iron powder, lanthanum powder, aluminum powder, chromium powder, carbon powder, copper powder and nickel powder.

3. The method for preparing a nickel-based alloy according to claim 2, characterized in that: The melt processing comprises the following steps: First melting and heat preservation: heating from room temperature to 1000℃~1200℃ at a heating rate of 10℃ / min~20℃ / min, and heat preservation for 0.5h~1h; Second melting and heat preservation: heating from 1600℃~1700℃ to 1700℃~1750℃ at a heating rate of 25℃ / min~35℃ / min, and keeping the temperature for 1h~2h; The third melting and heat preservation: heating from 1700°C to 1750°C to 2500°C to 3000°C at a heating rate of 45°C / min to 50°C / min, and heat preservation for 2h to 5h; First cooling and heat preservation: cooling from 2500℃~3000℃ to 1000℃~1200℃ at a cooling rate of 55℃ / min~60℃ / min, and heat preservation for 0.5h~1.5h; Second cooling and heat preservation: cooling from 1000℃~1200℃ to room temperature at a cooling rate of 5℃ / min~10℃ / min; The ingot is turned over, and the first melting and heat preservation, the second melting and heat preservation, the third melting and heat preservation, the first cooling and heat preservation, and the second cooling and heat preservation are repeated to obtain the nickel-based alloy.

4. A glass mold, comprising a mold body, characterized in that: The mold body material comprises the nickel-based alloy as claimed in claim 1.

5. The glass mold according to claim 4, characterized in that: The glass mold further comprises a wear-resistant layer coated on the surface of the mold body; The wear-resistant layer material includes a high entropy alloy; The metal raw materials of the high entropy alloy include five or more of iron, aluminum, chromium, copper, nickel, titanium and magnesium.

6. The glass mold according to claim 5, characterized in that: The thickness of the wear-resistant layer is 120 μm to 345 μm.

7. A method for preparing a glass mold according to any one of claims 4 to 6, characterized in that: The steps include: The nickel-based alloy is made into a glass mold body.

8. The method for preparing a glass mold according to claim 7, characterized in that: The preparation method further comprises the steps of preparing the wear-resistant layer: After spraying the wear-resistant layer spray coating onto the surface of the glass mold body, remelting the coating and then heat-insulating the coating to obtain the wear-resistant layer; The wear-resistant layer spray coating comprises high entropy alloy metal raw powder; The high entropy alloy metal raw powder includes a mixture of five or more metal powders of iron, aluminum, chromium, copper, nickel, titanium and magnesium.

9. The method for preparing a glass mold according to claim 8, characterized in that: The spraying is plasma spraying; And / or, the remelting temperature is 1200° C. to 1300° C.; And / or, the insulation temperature is 1200° C. to 1300° C., and the insulation time is 1 h to 2 h.

10. Use of the nickel-based alloy according to claim 1 in the field of mold manufacturing.