Preparation process of HEAs sterilization special alloy

Abstract

The invention discloses a preparation process of an HEAs sterilization special alloy, and relates to the technical field of alloy preparation. The preparation method comprises the steps of S1, raw material preparation, S2, mixing and pretreatment, S3, pressing processing, S4, sintering treatment and S5, aftertreatment. Cu, Ni, Sn, Cr, Si and Al are compounded according to different proportions, powder is pressed and formed under the condition of a two-way pressing process under the high-pressure condition, so that the uniform HEAs sterilization special alloy material with specific performance is obtained, the microstructure of the alloy is effectively controlled through a powder metallurgy method, and the alloy quality is improved. The HEAs sterilization special alloy material is a high-entropy alloy which is difficult to synthesize through a conventional melt metallurgy method, under different preparation parameters, the prepared HEAs sterilization special alloy material has excellent antibacterial and sterilization effects and durability, and the HEAs sterilization special alloy material not only has sterilization and algae inhibition functions on a water body, but also has good antibacterial and antibacterial effects on the water body. And the scale inhibitor can be widely applied to water bodies such as seawater, backwater, concentrated water, sewage, domestic water and the like.

Description

Technical Field

[0001] The invention relates to the technical field of alloy preparation, in particular to a process for preparing a HEAs sterilization special alloy. Background Art

[0002] Alloy materials are substances with metallic properties that are synthesized by two or more metals and metals or non-metals through a certain method. They are generally obtained by melting into a uniform liquid and solidifying. According to the number of constituent elements, they can be divided into binary alloys, ternary alloys and multi-element alloys. Alloy materials are generally prepared through processes such as smelting, mechanical alloying, sintering, and vapor deposition; However, the alloy materials prepared by the prior art still have some defects when used in water pipelines: Water pipelines, especially when used in seawater, sewage, or industrial wastewater, have high requirements for the corrosion and antibacterial properties of the circulating medium. However, when alloy materials prepared by existing technologies are processed into pipelines, they are often difficult to cope with the high corrosion and bacteria problems in special environments, and thus cannot achieve anti-corrosion and antibacterial sterilization effects, which in turn affects the service life of the pipeline.

[0003] In view of the above problems, the inventors proposed a HEAs sterilization special alloy preparation process to solve the above problems. Summary of the invention

[0004] In order to solve the problem that the alloy materials prepared by the prior art have poor anti-corrosion and antibacterial sterilization effects; the purpose of the present invention is to provide a preparation process of HEAs sterilization special alloy.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solution: A process for preparing HEAs sterilization special alloy comprises the following steps: S1. Raw material preparation Selecting Cu, Ni, Sn, Cr, Si and Al, adding Cu, Ni, Sn, Cr, Si and Al into a ball mill according to percentage, grinding Cu, Ni, Sn, Cr, Si and Al into powder to obtain metal powder; S2. Mixing and preprocessing Add metal powder into the mixing equipment, mix the metal powder evenly, and remove oxides in the metal powder by chemical cleaning; S3. Pressing The pre-treated metal powder is injected into the mold of the forming press and high pressure is applied to press the metal powder into the shape of the mold cavity. After demolding, the blank is formed; S4. Sintering treatment The blank formed by pressing is sent into a sintering furnace to perform sintering treatment on the blank; S5. Post-processing The sintered blank is sent to a machining device for grinding, polishing and cutting to obtain the HEAs sterilization special alloy.

[0006] Preferably, in S1, the percentages of Cu, Ni, Sn, Cr, Si and Al are 20-30%, 20-25%, 15-18%, 15-30%, 5-10% and 8-10%.

[0007] Preferably, in S2, oxides in the metal powder are removed by chemical cleaning, and the specific steps are as follows: S21, prepare pickling solution: pour warm water into the pickling tank, add acid solution and corrosion inhibitor, and stir evenly to obtain the pickling solution; S22, soaking treatment: pour the metal powder into the pickling solution, and soak for 15~20min; S23, Neutralization treatment: Take the metal powder out of the pickling solution and put it into a neutralization tank for neutralization treatment. A protective film is formed on the metal powder to prevent the surface of the metal powder from oxidation and corrosion again.

[0008] Preferably, in S3, the pressure in the pressing process is 700-1000 MPa; The female mold of the molding press does not move during the pressing process, and the upper mold and the lower mold apply pressure to the metal powder.

[0009] Preferably, in S4, the temperature of the sintering treatment is 1000-1500°C.

[0010] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, by compounding Cu, Ni, Sn, Cr, Si and Al in different proportions, the powder is pressed into shape under high pressure conditions and under the conditions of a bidirectional pressing process to obtain a uniform HEAs sterilization special alloy material with specific properties. The powder metallurgy method effectively controls the microstructure of the alloy. The HEAs sterilization special alloy material is a high-entropy alloy that is difficult to synthesize by conventional melting metallurgy. Under different preparation parameters, the prepared HEAs sterilization special alloy material has excellent antibacterial and sterilization effects and durability, so that the HEAs sterilization special alloy material not only has a sterilization and algae inhibition function for water bodies, but also has a scale-removing and anti-corrosion effect on water pipelines, and can be widely used in seawater, return water, concentrated water, sewage, domestic water and other water bodies; 2. In the present invention, by introducing a chemical cleaning process into the metal powder, the oxides in each metal powder are fully removed, thereby improving the wear resistance of the prepared HEAs sterilization special alloy material, and improving the stability and corrosion resistance of the prepared HEAs sterilization special alloy material. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] 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 description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0012] Figure 1 The present invention is a process flow chart of a HEAs sterilization special alloy preparation process. DETAILED DESCRIPTION

[0013] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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.

[0014] Embodiment 1: Figure 1 As shown, the present invention provides a process for preparing a HEAs sterilization special alloy, comprising the following steps: S1. Raw material preparation Selecting Cu, Ni, Sn, Cr, Si and Al, adding 22% of Cu, 25% of Ni, 18% of Sn, 15% of Cr, 10% of Si and 10% of Al into a ball mill, grinding Cu, Ni, Sn, Cr, Si and Al into powders to obtain metal powders; S2. Mixing and preprocessing Add metal powder into the mixing equipment, mix the metal powder evenly, and remove oxides in the metal powder by chemical cleaning; To remove oxides from metal powder, the specific steps are as follows: S21, prepare pickling solution: pour warm water into the pickling tank, add acid solution and corrosion inhibitor, and stir evenly to obtain the pickling solution; S22, soaking treatment: pour the metal powder into the pickling solution, and soak for 15 minutes; S23, neutralization treatment: taking the metal powder out of the pickling solution and placing it in a neutralization tank for neutralization treatment, so that a protective film is formed on the metal powder to prevent the surface of the metal powder from being oxidized and corroded again; S3. Pressing The pretreated metal powder is injected into the mold of the molding press and the pressure is applied to 800MPa. During the pressing process, the female mold of the molding press does not move, and the upper and lower molds apply pressure to the metal powder to press the metal powder into the shape of the mold cavity. After demolding, the blank is formed; S4. Sintering treatment The blank formed by pressing is sent into a sintering furnace at a sintering temperature of 1000°C to perform sintering on the blank; S5. Post-processing The sintered blank is sent to a machining device for grinding, polishing and cutting to obtain the HEAs sterilization special alloy.

[0015] Embodiment 2: The present invention provides a process for preparing a HEAs sterilization special alloy, comprising the following steps: S1. Raw material preparation Selecting Cu, Ni, Sn, Cr, Si and Al, adding 30% of Cu, 20% of Ni, 15% of Sn, 15% of Cr, 10% of Si and 10% of Al into a ball mill, grinding Cu, Ni, Sn, Cr, Si and Al into powders to obtain metal powders; S2. Mixing and preprocessing Add metal powder into the mixing equipment, mix the metal powder evenly, and remove oxides in the metal powder by chemical cleaning; To remove oxides from metal powder, the specific steps are as follows: S21, prepare pickling solution: pour warm water into the pickling tank, add acid solution and corrosion inhibitor, and stir evenly to obtain the pickling solution; S22, soaking treatment: pour the metal powder into the pickling solution, and soak for 20 minutes; S23, neutralization treatment: taking the metal powder out of the pickling solution and placing it in a neutralization tank for neutralization treatment, so that a protective film is formed on the metal powder to prevent the surface of the metal powder from being oxidized and corroded again; S3. Pressing The pretreated metal powder is injected into the mold of the molding press and the pressure is applied to 1000MPa. During the pressing process, the female mold of the molding press does not move, and the upper and lower molds apply pressure to the metal powder to press the metal powder into the shape of the mold cavity. After demolding, the blank is formed; S4. Sintering treatment The blank formed by pressing is sent into a sintering furnace at a sintering temperature of 1500°C to perform sintering on the blank; S5. Post-processing The sintered blank is sent to a machining device for grinding, polishing and cutting to obtain the HEAs sterilization special alloy.

[0016] Embodiment 3: The present invention provides a process for preparing a HEAs sterilization special alloy, comprising the following steps: S1. Raw material preparation Selecting Cu, Ni, Sn, Cr, Si and Al, adding 28% of Cu, 22% of Ni, 17% of Sn, 20% of Cr, 5% of Si and 8% of Al into a ball mill, grinding Cu, Ni, Sn, Cr, Si and Al into powders to obtain metal powders; S2. Mixing and preprocessing Add metal powder into the mixing equipment, mix the metal powder evenly, and remove oxides in the metal powder by chemical cleaning; To remove oxides from metal powder, the specific steps are as follows: S21, prepare pickling solution: pour warm water into the pickling tank, add acid solution and corrosion inhibitor, and stir evenly to obtain the pickling solution; S22, soaking treatment: pour the metal powder into the pickling solution, and soak for 18 minutes; S23, neutralization treatment: taking the metal powder out of the pickling solution and placing it in a neutralization tank for neutralization treatment, so that a protective film is formed on the metal powder to prevent the surface of the metal powder from being oxidized and corroded again; S3. Pressing The pretreated metal powder is injected into the mold of the molding press and the pressure is applied to 900MPa. During the pressing process, the female mold of the molding press does not move, and the upper and lower molds apply pressure to the metal powder to press the metal powder into the shape of the mold cavity. After demolding, the blank is formed; S4. Sintering treatment The blank formed by pressing is sent into a sintering furnace at a sintering temperature of 1300°C to perform sintering on the blank; S5. Post-processing The sintered blank is sent to a machining device for grinding, polishing and cutting to obtain the HEAs sterilization special alloy.

[0017] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A process for preparing HEAs sterilization special alloy, characterized in that: The following steps are involved: S1. Raw material preparation Selecting Cu, Ni, Sn, Cr, Si and Al, adding Cu, Ni, Sn, Cr, Si and Al into a ball mill according to percentage, grinding Cu, Ni, Sn, Cr, Si and Al into powder to obtain metal powder; S2. Mixing and pre-processing Add metal powder into the mixing equipment, mix the metal powder evenly, and remove oxides in the metal powder by chemical cleaning; S3. Pressing The pre-treated metal powder is injected into the mold of the forming press and high pressure is applied to press the metal powder into the shape of the mold cavity. After demolding, the blank is formed; S4. Sintering treatment The blank formed by pressing is sent into a sintering furnace to perform sintering treatment on the blank; S5. Post-processing The sintered blank is sent to a machining device for grinding, polishing and cutting to obtain the HEAs sterilization special alloy.

2. A process for preparing HEAs sterilization special alloy according to claim 1, characterized in that: In S1, the percentages of Cu, Ni, Sn, Cr, Si and Al are 20-30%, 20-25%, 15-18%, 15-30%, 5-10%, and 8-10%.

3. A process for preparing HEAs sterilization special alloy according to claim 1, characterized in that: In S2, oxides in the metal powder are removed by chemical cleaning, and the specific steps are as follows: S21, prepare pickling solution: pour warm water into the pickling tank, add acid solution and corrosion inhibitor, and stir evenly to obtain the pickling solution; S22, soaking treatment: pour the metal powder into the pickling solution, and soak for 15 to 20 minutes; S23, Neutralization treatment: Take the metal powder out of the pickling solution and put it into a neutralization tank for neutralization treatment. A protective film is formed on the metal powder to prevent the surface of the metal powder from oxidation and corrosion again.

4. A process for preparing HEAs sterilization special alloy as claimed in claim 1, characterized in that: In S3, the pressure during the pressing process is 700-1000 MPa; The female mold of the molding press does not move during the pressing process, and the upper mold and the lower mold apply pressure to the metal powder.

5. A process for preparing HEAs sterilization special alloy as claimed in claim 1, characterized in that: In S4, the sintering temperature is 1000-1500°C.

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