Flaking process of high-strength stainless steel powder

Abstract

The invention discloses a flaking process of high-strength stainless steel powder, and belongs to the technical field of metal materials. The preparation method comprises the following steps: S1, proportioning: selecting various raw materials including carbon, manganese, phosphorus, sulfur, silicon, chromium, aluminum and niobium according to the proportion; step S2, ball milling: putting the selected various raw materials into a high-energy ball mill, and carrying out flaky treatment on the various raw materials by the high-energy ball mill, so that the various raw materials form powder; s3, drying: drying the raw materials forming the flaky powder through a drying machine, and removing moisture in the powder raw materials through the drying machine; s4, annealing: performing annealing treatment on the dried powder raw material, removing impurities and oxides, eliminating a hardening phenomenon of the powder raw material, and stabilizing a lattice structure; the problems that in the prior art, after stainless steel powder processed through a stainless steel powder processing technology is added into a coating, the physical properties such as abrasion resistance, hardness and strength of the coating cannot be improved, and the using effect is poor are solved.

Description

Technical Field

[0001] The invention relates to the technical field of metal materials, and more specifically to a flaking process for high-strength stainless steel powder. Background Art

[0002] Stainless steel powder has good corrosion resistance and durability. Its flake particles can be positioned parallel to the coating surface and distributed throughout the coating to form a shielding layer with excellent hiding power to block moisture. It is mainly used for maintenance coatings, heat-resistant and durable coatings. Stainless steel flake pigments can produce extremely attractive natural metallic colors in decorative paints.

[0003] At present, conventional stainless steel powder uses low carbon steel, i.e. stainless steel containing 18% to 20% chromium, 10% to 12% nickel, and about 3% molybdenum as raw material, and after atomization, is ball-milled in the presence of a lubricant (stearic acid). However, after the stainless steel powder processed by conventional stainless steel powder processing technology is added to the coating, the physical properties of the coating such as wear resistance, hardness, and strength cannot be improved, and the use effect is poor. Therefore, the present invention proposes a flaking process for high-strength stainless steel powder. Summary of the invention

[0004] 1. Technical issues to be solved

[0005] In view of the problems existing in the prior art, the purpose of the present invention is to provide a flaking process for high-strength stainless steel powder, aiming to solve the problem that the stainless steel powder processed by the stainless steel powder processing process in the prior art cannot improve the physical properties of the coating such as wear resistance, hardness, strength, etc. after being added to the coating, resulting in poor use effect.

[0006] 2. Technical solution

[0007] To solve the above problems, the present invention adopts the following technical solutions:

[0008] A process for flaking high-strength stainless steel powder comprises the following steps:

[0009] Step S1, ingredients: selecting various raw materials including carbon, manganese, phosphorus, sulfur, silicon, chromium, aluminum and niobium according to the proportion;

[0010] Step S2, ball milling: putting the selected raw materials into a high-energy ball mill, and the high-energy ball mill performs flaking treatment on the raw materials to form powders;

[0011] Step S3, drying: the raw material forming the flaky powder is dried by a dryer, and the dryer removes the moisture in the powder raw material;

[0012] Step S4, annealing: annealing the dried powder raw material to remove impurities and oxides, eliminate the hardening phenomenon of the powder raw material, and stabilize the lattice structure;

[0013] Step S5, classification: the annealed powder raw material is placed into a classifier, and the classifier separates the powder raw materials that meet the requirements in time;

[0014] Step S6, mixing and packaging: mixing the powder raw material into the coating to form a product with good wear resistance for packaging.

[0015] As a preferred embodiment of the present invention, in step S1, the ratios of the various raw materials are respectively 0.95%-1.2% carbon, 1% manganese, 0.08% phosphorus, 0.03% sulfur, 1% silicon, 16%-18% chromium, 0.75% aluminum and 2% niobium.

[0016] As a preferred embodiment of the present invention, in step S3, the drying temperature of the flaky powder in the dryer is 30-60°C.

[0017] As a preferred solution of the present invention, in step S4, the temperature of the annealing treatment on the powder is 300-600°C.

[0018] As a preferred solution of the present invention, in step S5, the classifier classifies the powder raw material into different particle size grades, and the powder raw material reaching D50: 20-40 microns is separated out, and the powder raw material that does not meet the requirement repeats step S2 again.

[0019] 3. Beneficial effects

[0020] Compared with the prior art, the advantages of the present invention are:

[0021] (1) In this scheme, the raw material ratio is 0.95%-1.2% carbon, 1% manganese, 0.08% phosphorus, 0.03% sulfur, 1% silicon, 16%-18% chromium, 0.75% aluminum and 2% niobium. By adding 2% niobium to the stainless steel powder, the physical properties of the stainless steel powder such as wear resistance, hardness and strength can be improved.

[0022] (2) In this scheme, a high-energy ball mill crushes a variety of raw materials and performs flaking treatment to form flaky powders. The flaky powders are dried in a dryer to remove moisture, which is convenient for subsequent processing of the flaky powders. The dried flaky powders can be reduced by annealing to remove impurities and oxides, thereby facilitating a more thorough elimination of the hardening phenomenon. The dried powder raw materials are graded, and the grader separates the raw materials that meet the standards in a timely manner, thereby avoiding unnecessary energy consumption. Finally, the stainless steel powder formed by the flaked powder raw materials processed through multiple steps is mixed with the coating, which can effectively improve the wear resistance of the coating. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1It is a flowchart of the present invention;

[0024] Figure 2 It is a principle block diagram of the present invention;

[0025] Figure 3 It is the raw material ratio diagram of the present invention. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. 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.

[0027] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] Example:

[0030] See also Figure 1-3 , a process for flaking high-strength stainless steel powder, comprising the following steps;

[0031] Step S1, ingredients: selecting various raw materials including carbon, manganese, phosphorus, sulfur, silicon, chromium, aluminum and niobium according to the proportion;

[0032] Step S2, ball milling: putting the selected raw materials into a high-energy ball mill, and the high-energy ball mill performs flaking treatment on the raw materials to form flaky powders;

[0033] Step S3, drying: the raw material forming the flaky powder is dried by a dryer, and the dryer removes the moisture in the powder raw material;

[0034] Step S4, annealing: annealing the dried powder raw material to remove impurities and oxides, eliminate the hardening phenomenon of the powder raw material, and stabilize the lattice structure;

[0035] Step S5, classification: the annealed powder raw material is placed into a classifier, and the classifier separates the powder raw materials that meet the requirements in time;

[0036] Step S6, mixing and packaging: mixing the powder raw material into the coating to form a product with good wear resistance for packaging.

[0037] In this embodiment, in the raw material ratio, niobium is added to improve the physical properties of the stainless steel powder, such as wear resistance, hardness, and strength. A high-energy ball mill crushes and flaks a variety of raw materials to form flaky powders. The flaky powders are dried by a dryer to remove moisture, which is convenient for subsequent processing of the flaky powders. The dried flaky powders can be reduced by annealing to remove impurities and oxides, which is conducive to more thorough elimination of the hardening phenomenon. The dried powder raw materials are graded, and the grader separates the raw materials that meet the standards in time, thereby avoiding unnecessary energy consumption. Finally, the wear resistance of the coating is improved by mixing the flaked powder raw materials with the coating.

[0038] Specifically, in step S1, the proportions of the various raw materials are respectively 0.95%-1.2% carbon, 1% manganese, 0.08% phosphorus, 0.03% sulfur, 1% silicon, 16%-18% chromium, 0.75% aluminum and 2% niobium.

[0039] In this embodiment, carbon, manganese, phosphorus, sulfur, silicon, chromium and aluminum are added in specific proportions, and finally 2% niobium is added to the various raw materials. Niobium combined with other raw materials can effectively improve the wear resistance of stainless steel powder.

[0040] Specifically, in step S3, the drying temperature of the flaky powder in the dryer is 30-60°C.

[0041] In this embodiment, the raw material will contain more water during the ball milling process, and the dryer can quickly remove the water in the flaky powder at a temperature of 30-60°C.

[0042] Specifically, in step S4, the temperature of the annealing treatment on the powder is 300-600°C.

[0043] In this embodiment, the annealing temperature is set at 300-600° C., which can effectively ensure the annealing effect of the powder raw material.

[0044] Specifically, in step S5, the classifier classifies the powder raw material into different particle size grades, and the powder raw material reaching D50: 20-40 microns is separated out, and the powder raw material that does not meet the requirements repeats step S2 again.

[0045] In this embodiment, only powder raw materials that meet the D50 standard will be separated. The powder raw materials that meet the D50 standard are convenient to mix in the coating, so that the coating can achieve good use effect.

[0046] Working principle: According to the ratio, various raw materials including 0.95%-1.2% carbon, 1% manganese, 0.08% phosphorus, 0.03% sulfur, 1% silicon, 16%-18% chromium, 0.75% aluminum and 2% niobium are selected, and the selected raw materials are put into a high-energy ball mill, which flaks the raw materials to form powders. The raw materials forming flaky powders are dried by a dryer, which removes moisture from the powder raw materials, and anneals the dried powder raw materials to remove impurities and oxides, eliminate the hardening phenomenon of the powder raw materials, stabilize the lattice structure, and put the annealed powder raw materials into a classifier. The powder raw materials that do not meet the requirements are again put into the high-energy ball mill for ball milling, and the powder raw materials that meet the requirements are separated in time by the classifier, and finally the powder raw materials are mixed into the coating to form a product with good wear resistance for packaging.

[0047] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and improved concepts of the present invention within the technical scope disclosed by the present invention, and they should be covered by the protection scope of the present invention.

Claims

1. A process for flaking high-strength stainless steel powder, characterized in that: The steps include: Step S1, ingredients: selecting various raw materials including carbon, manganese, phosphorus, sulfur, silicon, chromium, aluminum and niobium according to the proportion; Step S2, ball milling: putting the selected raw materials into a high-energy ball mill, and the high-energy ball mill performs flaking treatment on the raw materials to form powders; Step S3, drying: the raw material forming the flaky powder is dried by a dryer, and the dryer removes the moisture in the powder raw material; Step S4, annealing: annealing the dried powder raw material to remove impurities and oxides, eliminate the hardening phenomenon of the powder raw material, and stabilize the lattice structure; Step S5, classification: the annealed powder raw material is placed into a classifier, and the classifier separates the powder raw materials that meet the requirements in time; Step S6, mixing and packaging: mixing the powder raw material into the coating to form a product with good wear resistance for packaging.

2. The process for flaking high-strength stainless steel powder according to claim 1, characterized in that: In step S1, the proportions of the various raw materials are respectively 0.95%-1.2% carbon, 1% manganese, 0.08% phosphorus, 0.03% sulfur, 1% silicon, 16%-18% chromium, 0.75% aluminum and 2% niobium.

3. The process for flaking high-strength stainless steel powder according to claim 2, characterized in that: In step S3, the drying temperature of the flaky powder in the dryer is 30-60°C.

4. The process for flaking high-strength stainless steel powder according to claim 3, characterized in that: In step S4, the annealing treatment is performed on the powder at a temperature of 300-600°C.

5. The process for flaking high-strength stainless steel powder according to claim 4, characterized in that: In step S5, the classifier classifies the powder raw materials into different particle size grades, and the powder raw materials reaching D50: 20-40 microns are separated out, and the powder raw materials that do not meet the requirements repeat step S2 again.

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