Blender blade and preparation method thereof

Abstract

This application relates to the technical field of mixer accessories, and in particular to a mixer blade and a preparation method thereof. The mixer blade includes: a ductile matrix, a wear-resistant part, and a wear-resistant layer; wherein, the ductile matrix is formed with a plurality of forming holes, and the wear-resistant part is arranged in the forming holes; the wear-resistant layer covers the surfaces of the ductile matrix and the wear-resistant part. It can be seen that the wear-resistant part and the wear-resistant layer have a certain hardness, that is, they have good wear resistance, while the ductile matrix has a certain toughness. The toughness of the ductile matrix is used to make up for the brittleness of the wear-resistant part and the wear-resistant layer, achieving complementary advantages, that is, the overall impact toughness of this mixer blade is relatively high, solving the problem of fracture during application, and also having good resistance to abrasive wear.

Description

Technical Field

[0001] This application relates to the technical field of mixer accessories, and in particular to a mixer blade and a preparation method thereof. Background Art

[0002] Currently, mixers are commonly used in the mixing operations of power plant ash and slag, mine concentrate powder, slurry, and chemical raw material powder particles. However, the blades of existing mixers adopt traditional steel casting technology, namely single-metal sand casting process, to produce low-alloy steel blades, and then obtain the final blade products through heat treatment. Although the application of the heat treatment process can improve the hardness of the products, the brittleness of the blade products increases, that is, they are prone to fracture, and the balance between the toughness and hardness of the blade products cannot be achieved. Furthermore, the purpose of increasing the anti-abrasive wear performance of the products and reducing the wear rate cannot be achieved. Summary of the Invention

[0003] The purpose of this application is to provide a mixer blade and a preparation method thereof, which to a certain extent solve the technical problem that in the prior art, the balance between the toughness and hardness of the blade products cannot be achieved, and thus the purpose of increasing the anti-abrasive wear performance of the products and reducing the wear rate cannot be achieved.

[0004] This application provides a mixer blade, including: a tough matrix, a wear-resistant part, and a wear-resistant layer; wherein, the tough matrix is formed with a plurality of forming holes, and the wear-resistant part is arranged in the forming holes;

[0005] The wear-resistant layer covers the surfaces of the tough matrix and the wear-resistant part.

[0006] In the above technical solution, further, the wear-resistant part, the wear-resistant layer and the tough matrix are integrally formed by the lost foam negative pressure casting process.

[0007] In any of the above technical solutions, further, the thickness of the casting bonding layer between the wear-resistant part, the wear-resistant layer and the tough matrix is equal to 30um - 100um.

[0008] In any of the above technical solutions, further, the distance between any two adjacent forming holes is 15mm - 20mm;

[0009] The diameter of the forming hole is 20mm - 25mm.

[0010] In any of the above technical solutions, further, the sum of the cross-sectional areas of the plurality of forming holes along the height direction of the tough matrix is 25% of the cross-sectional area of the tough matrix along its height direction;

[0011] The thickness of the tough matrix is 25% of the total thickness of the mixer blade;

[0012] The weight of the ductile matrix is 10% of the total weight of the wear-resistant part and the wear-resistant layer.

[0013] In any of the above technical solutions, further, the ductile matrix is formed of low-alloy structural steel, and the low-alloy structural steel is 16Mn steel;

[0014] Both the wear-resistant layer and the wear-resistant part are formed of high-chromium cast iron, and the high-chromium cast iron includes the following components by mass percentage: C = 3% - 4.3%, Si = 0.8% - 1.2%, Mn = 0.5% - 0.9%, Cr = 20% - 28%, Mo = 0.3% - 0.7%, Ni = 0.3% - 0.4%, Cu = 0.3% - 0.4%, V = 0.15% - 0.2%, P < 0.06%, S < 0.06%, Re = 0.02% - 1%, Ti = 0.25%.

[0015] In any of the above technical solutions, further, the plurality of forming holes are staggered and evenly distributed.

[0016] In any of the above technical solutions, further, the ductile matrix has a sector plate structure, and both the inner ring side close to the center of the circle and the outer ring side far from the center of the circle of the sector plate structure are arc-shaped, and the sector plate structure is formed with bolt mounting holes; or

[0017] The ductile matrix has a sector plate structure, and the inner ring side close to the center of the circle of the sector plate structure is linear, and the outer ring side far from the center of the circle of the sector plate structure is arc-shaped; the linear inner ring side of the sector plate structure is connected with a flat base, and the base is provided with mounting through holes; or

[0018] The ductile matrix has a sector plate structure, and both the inner ring side close to the center of the circle and the outer ring side far from the center of the circle of the sector plate structure are arc-shaped; the arc-shaped inner ring side of the sector plate structure is connected with an arc-shaped plate base, and the base is provided with mounting through holes.

[0019] The present application also provides a preparation method for a mixer blade, which is used to form the mixer blade according to any of the above technical solutions. Therefore, it has all the beneficial technical effects of the mixer blade, and will not be elaborated here.

[0020] In the above technical solution, further, the preparation method of the mixer blade includes the following steps:

[0021] Perform sandblasting treatment on the ductile matrix;

[0022] Adopt the lost foam negative pressure casting process to form the wear-resistant part and the wear-resistant layer in the forming holes and on the surface of the ductile matrix respectively, so as to obtain an intermediate product;

[0023] The intermediate product is quenched and tempered successively.

[0024] In any of the above technical solutions, further, the pouring temperature of the lost foam negative pressure casting process is 1360°C - 1400°C;

[0025] The heating temperature of the quenching is 1020°C

[0026] The heating temperature of the tempering is 500°C.

[0027] Compared with the prior art, the beneficial effects of the present application are as follows:

[0028] The mixer blade provided by the present application includes a tough matrix, a wear-resistant part, and a wear-resistant layer. The wear-resistant part and the wear-resistant layer have a certain hardness, that is, they have good wear resistance, while the tough matrix has a certain toughness. Using its toughness to make up for the brittleness of the wear-resistant part and the wear-resistant layer achieves complementary advantages, that is, the overall impact toughness of the mixer blade is relatively high, solving the problem of fracture during application, and it also has good anti-abrasive wear performance.

[0029] The mixer blade produced by the preparation method of the mixer blade provided by the present application realizes the balance between the toughness and hardness of the product, ensuring that the product has excellent anti-abrasive wear performance on the premise of not breaking. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0031] Figure 1 It is a schematic structural diagram of the mixer blade provided in Embodiment 1 of the present application;

[0032] Figure 2 It is another schematic structural diagram of the mixer blade provided in Embodiment 1 of the present application;

[0033] Figure 3 It is a schematic structural diagram of the mixer blade provided in Embodiment 2 of the present application;

[0034] Figure 4 It is another schematic structural diagram of the mixer blade provided in Embodiment 2 of the present application;

[0035] Figure 5 It is a schematic structural diagram of the mixer blade provided in Embodiment 3 of the present application;

[0036] Figure 6 Another structural schematic diagram of the blender blade provided in the third embodiment of the present application;

[0037] Figure 7 Another structural schematic diagram of the blender blade provided in the third embodiment of the present application;

[0038] Figure 8 Process schematic diagram of the preparation method of the blender blade provided in the fourth embodiment of the present application.

[0039] Reference numerals:

[0040] 1 - Tough matrix, 11 - Forming hole, 2 - Wear-resistant part, 3 - Wear-resistant layer, 4 - Bolt mounting hole, 5 - Base, 51 - Mounting through hole. Detailed implementation manners

[0041] The technical solutions of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some but not all of the embodiments of the present application.

[0042] The components of the embodiments of the present application usually described and shown in the accompanying drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but merely represents the selected embodiments of the present application.

[0043] All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts belong to the scope of protection of the present application.

[0044] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0045] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "joined" should be understood in a broad sense. For example, it 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0046] The following refers to Figures 1 to 8 Describe the mixer blade and the preparation method of the mixer blade according to some embodiments of the present application.

[0047] Embodiment 1

[0048] Refer to Figure 1 and Figure 2 As shown, the embodiment of the present application provides a mixer blade, including: a ductile matrix 1, a wear-resistant part 2, and a wear-resistant layer 3;

[0049] Among them, a plurality of forming holes 11 are formed in the ductile matrix 1, and the wear-resistant part 2 is arranged in the forming holes 11. Specifically, in this embodiment, the ductile matrix 1 is a kind of perforated plate. Of course, it is not limited thereto and can be set according to actual needs;

[0050] The wear-resistant layer 3 covers the surfaces of the ductile matrix 1 and the wear-resistant part 2.

[0051] From the above-described structure, it can be seen that the wear-resistant part 2 and the wear-resistant layer 3 have a certain hardness, that is, they have good wear resistance, while the ductile matrix 1 has a certain toughness. Using its toughness to make up for the brittleness of the wear-resistant part 2 and the wear-resistant layer 3 achieves complementary advantages, that is, the overall impact toughness of the mixer blade is relatively high, solving the problem of fracture during application, and also having good anti-abrasive wear performance.

[0052] Among them, preferably, the ductile matrix 1 has a fan-shaped plate structure, and both the inner ring side close to the center of the circle and the outer ring side far from the center of the circle of the fan-shaped plate structure are arc-shaped. The fan-shaped plate structure forms a bolt mounting hole 4, that is, the mixer blade is directly mounted to the corresponding mounting position on the mixer rotating main shaft through the bolt mounting hole 4. This structure is relatively simple and convenient for processing and manufacturing.

[0053] Among them, preferably, a part of the forming holes 11 are symmetrically distributed on both sides of the center line of the fan-shaped plate structure, and the connection line of the plurality of forming holes 11 on each side of the center line is a curve extending along the length direction of the center line; another part of the forming holes 11 is exactly located on the center line of the fan-shaped plate structure and is arranged at intervals along the extending direction of the center line. Generally speaking, the above-mentioned plurality of forming holes 11 are staggered and evenly distributed, so that the wear-resistant part 2 is more evenly distributed, and good wear resistance is achieved everywhere on the ductile matrix 1.

[0054] In this embodiment, preferably, as Figure 1 shown, the ductile matrix 1 is a perforated plate formed of low-alloy structural steel, and the ductile matrix 1 includes the following components by mass percentage: C < 0.2%, Mn < 0.5Cr, Mo < 0.25%, Ni < 0.25%. Specifically, the above-mentioned low-alloy structural steel is 16Mn steel. The reason for using this material is that after the blade is cast and formed, quenching is required. The ductile matrix 1 of 16Mn steel ensures that it will not harden during quenching. 16Mn steel best meets this condition, and it is convenient to obtain materials, and the cost is relatively low, and it has good toughness;

[0055] The wear-resistant layer 3 and the wear-resistant part 2 are both formed of high-chromium cast iron, which has good anti-wear performance and corrosion resistance, but at the same time has the deficiency of low impact toughness. Therefore, the ductile matrix 1 is needed to make up for the above deficiencies. Among them, the high-chromium cast iron includes the following components by mass percentage: C = 3% - 4.3%, Si = 0.8% - 1.2%, Mn = 0.5% - 0.9%, Cr = 20% - 28%, Mo = 0.3% - 0.7%, Ni = 0.3% - 0.4%, Cu = 0.3% - 0.4%, V = 0.15% - 0.2%, P < 0.06%, S < 0.06%, Re = 0.02% - 1%, Ti = 0.25%.

[0056] Further, preferably, the wear-resistant part 2 and the wear-resistant layer 3 of the above materials and the ductile matrix 1 are integrally formed by the lost foam negative pressure casting process, that is, the wear-resistant high-chromium cast iron and 16Mn are melted and cast, so as to achieve the effect of double-metal melting and casting, so that the blades of this mixer have the properties of the above two different materials, and use the plasticity of 16Mn steel to make up for the brittleness of high-chromium cast iron, so that the overall impact toughness of the product is increased to greater than or equal to 20 J·cm 2 , achieving the excellent performance of anti-wear and anti-corrosion of high-chromium cast iron without breaking during use and fully exerting it. Moreover, note that the reason for forming multiple forming holes 11 in the ductile matrix 1 is that in addition to ensuring the uniform distribution of high-chromium cast iron inside the ductile matrix 1, while ensuring strength and hardness, it can also make the ductile matrix 1 of 16Mn and the wear-resistant part 2 and the wear-resistant layer 3 of high-chromium cast iron have the largest possible surface area for fusion, so that the two metals are better combined into one without changing the characteristics of the two materials.

[0057] Note that the chemical composition of the above high-chromium cast iron is a range. Specifically, how much to adjust depends on the particle size of the ore to adjust the impact toughness of the product and the hardness of the ore to adjust the relative hardness of the product. The following takes the working conditions often encountered in actual production as an example to illustrate: pulverized coal ash particle size < 80 mesh (containing 62% of SiO2 and 12% of Al2O3), humidity: not forming mud and not raising dust, pH value 5 to 8. Under such working conditions, preferably:

[0058] The chemical composition of high-chromium cast iron is as follows: C = 4%, Si = 1.0%, Mn = 0.6%, Cr = 23%, Mo = 0.4%, Ni = 0.35%, Cu = 0.4%, V = 0.15%, P < 0.06%, S < 0.06%, Re = 0.03%, Ti = 0.25%.

[0059] On the premise of ensuring wear resistance and corrosion resistance, small values are taken for precious elements such as molybdenum, vanadium, titanium, and copper, resulting in lower costs, while a large value is taken for the carbon content to ensure sufficient hardness without increasing costs.

[0060] In this embodiment, preferably, the distance between any two adjacent forming holes 11 is 15 mm - 20 mm.

[0061] The reason for limiting the spacing of the forming holes 11 is as follows: If the distance between any two adjacent forming holes 11 is too small, the heat capacity becomes smaller, and when contacting high-temperature molten iron, the temperature rises quickly, the casting layer becomes thicker, low-carbon steel becomes high-carbon steel, and it will become hard and brittle during heat treatment quenching, that is, the toughness decreases; if the distance between any two adjacent forming holes 11 is too large, incomplete casting will occur, seriously affecting the mechanical strength of the product.

[0062] In this embodiment, preferably, the diameter of the forming hole 11 is 20 mm - 25 mm.

[0063] In this embodiment, preferably, although the sizes of each blade are different, the ductile matrix 1 should also change accordingly, and the number of forming holes 11 in each ductile matrix 1 also changes accordingly. However, it is necessary to ensure that the sum of the cross-sectional areas of all the forming holes 11 in each ductile matrix 1 is one-fourth of the cross-sectional area of the entire blade, that is, the sum of the cross-sectional areas of multiple forming holes 11 along the height direction of the ductile matrix 1 is 25% of the cross-sectional area of the ductile matrix 1 along its height direction. Only in this way can it be ensured that the ductile matrix 1 of 16Mn steel and the wear-resistant part 2 and wear-resistant layer 3 of high-chromium cast iron have the largest surface area fusion as much as possible without changing the characteristics of the two materials.

[0064] Furthermore, preferably, the thickness of the ductile matrix 1 is 25% of the total thickness of the mixer blade. It can be seen that the thickness of the ductile matrix 1 is determined by the thickness of the finished mixer blade. If the ductile matrix 1 is too thin, it is easy to have excessive fusion during pouring, carburize the ductile matrix 1, resulting in embrittlement after heat treatment quenching and losing plasticity. If the ductile matrix 1 is too thick, the ductile matrix 1 and the high-temperature high-chromium cast iron do not fuse sufficiently during pouring. It can be seen that the above numerical limitations ensure that the ductile matrix 1 and the wear-resistant layer 3 are each in a suitable thickness, thereby achieving the balance of the toughness and hardness of the product.

[0065] Based on the above two limitations, the weight of the ductile matrix 1 is 10% of the total weight of the wear-resistant part 2 and the wear-resistant layer 3.

[0066] Furthermore, preferably, as Figures 1 to 3 shown, the thickness of the casting bonding layer between the wear-resistant part 2, the wear-resistant layer 3 and the ductile matrix 1 is equal to 30um - 100um, ensuring the bonding strength.

[0067] Embodiment 2

[0068] Refer to Figure 3 and Figure 4 shown, the mixer blade in this embodiment is an improvement based on Embodiment 1. The technical content disclosed in Embodiment 1 will not be described repeatedly, and the content disclosed in Embodiment 1 also belongs to the content disclosed in this embodiment.

[0069] The differences between the technical solution disclosed in this embodiment and the technical solution disclosed in Embodiment 1 are as follows:

[0070] The ductile matrix 1 has a sector plate structure, and the inner ring edge close to the center of the circle of the sector plate structure is straight, and the outer ring edge far from the center of the circle of the sector plate structure is arc-shaped;

[0071] A flat base 5 with a straight cross-section along the height direction of the ductile matrix 1 is connected to the straight inner ring edge of the sector plate structure. The base 5 is provided with an installation through hole 51. Specifically, the base 5 is installed at the corresponding position on the mixer rotating main shaft, that is, at the installation seat on the mixer rotating main shaft, so as to realize the connection between the mixer blade and the mixer rotating main shaft.

[0072] And note that the bolt installation hole 4 opened in the ductile matrix 1 itself is cancelled. The reason for using the above-mentioned mixer blade different from that in Embodiment 1 is mainly to adapt to mixers of different manufacturers.

[0073] Among them, optionally, the cross-section of the base 5 along the direction perpendicular to the height of the mixing blade is square, with a regular shape, which is convenient for processing and manufacturing.

[0074] Embodiment 3

[0075] Refer to Figures 5 to 7 shown, the mixer blade in this embodiment is an improvement based on Embodiment 1. The technical content disclosed in Embodiment 1 will not be described repeatedly, and the content disclosed in Embodiment 1 also belongs to the content disclosed in this embodiment.

[0076] The differences between the technical solution disclosed in this embodiment and the technical solution disclosed in Embodiment 1 are as follows:

[0077] The ductile matrix 1 has a sector plate structure, and both the inner ring edge close to the center of the circle and the outer ring edge far from the center of the circle of the sector plate structure are arc-shaped;

[0078] The arc-shaped inner ring edge of the sector plate structure is connected to a base 5 with an arc-shaped cross-section along the height direction of the ductile matrix 1. The base 5 is provided with a mounting through hole 51. Specifically, the base 5 is installed at the corresponding position on the rotating main shaft of the mixer, that is, at the mounting seat on the rotating main shaft of the mixer, so as to realize the connection between the mixer blade and the rotating main shaft of the mixer.

[0079] And note that the bolt mounting holes 4 opened in the ductile matrix 1 itself are cancelled. The reason for adopting the above-mentioned mixer blade different from that in the first embodiment is mainly to adapt to mixers of different manufacturers.

[0080] Among them, optionally, the cross-section of the base 5 along the height direction perpendicular to the mixing blade is polygonal, specifically hexagon, and it is a centrosymmetric figure, and by changing θ, the angle between the blade and the rotating main shaft of the mixer can be satisfied.

[0081] Embodiment 4

[0082] The embodiment of the present application also provides a preparation method of a mixer blade for forming the mixer blade described in any one of the above embodiments. Therefore, it has all the beneficial technical effects of this mixer blade and will not be elaborated here.

[0083] In this embodiment, preferably, as Figure 8 shown, the preparation method of the mixer blade includes the following steps:

[0084] Perform sandblasting treatment on the ductile matrix 1 of 16Mn steel. Note here that the ductile matrix 1 of 16Mn steel, that is, the orifice plate, can be pre-processed by a processing machine tool, and in this step, it is necessary to control the sum of the cross-sectional areas of the forming holes 11 and the thickness of the ductile matrix 1;

[0085] Adopt the lost foam negative pressure casting process to form the wear-resistant part 2 and the wear-resistant layer 3 of high-chromium cast iron in the forming holes 11 and on the surface of the ductile matrix 1 respectively, so as to obtain an intermediate product, and the metallographic structure of this intermediate product is A + B + C + D (where the casting temperature is 1360°C - 1400°C to ensure the fusion effect; the chemical composition of the wear-resistant high-chromium cast iron: C = 3% - 4.3%, Si = 0.8% - 1.2%, Mn = 0.5% - 0.9%, Cr = 20% - 28%, Mo = 0.3% - 0.7%, Ni = 0.3% - 0.4%, Cu = 0.3% - 0.4%, V = 0.15% - 0.2%, P < 0.06%, S < 0.06%, Re = 0.02% - 1%, Ti = 0.25%);

[0086] The intermediate product is quenched and tempered in sequence, and the metallographic structure of the finally obtained mixer blade product is A + B + D + E (wherein, the heating temperature of quenching is 1020°C, and air cooling is adopted to obtain an ideal metallographic structure; the heating temperature of tempering is 500°C to eliminate the internal stress of the product, and at the same time convert the metallographic structure C into the metallographic structure D, further improving the anti-wear and anti-corrosion performance of the product).

[0087] To more clearly understand the excellent performance of the mixer blade obtained by this process, the performance of the mixer blade obtained by using the above production process is compared with that of the ordinary mixer blade produced by the single-metal sand casting process in the prior art as follows. For details, see Table 1, Table 2 and Table 3:

[0088] Table 1 Comparison of Chemical Compositions of Two Products

[0089]

[0090] Note: Percentages are by weight

[0091] Table 2 Comparison of Metallographic Structures of Two Products

[0092]

[0093]

[0094] Table 3 Metallographic Code Table

[0095]

[0096] Through the above comparison and the corresponding hardness test, it can be known that after quenching and tempering treatment, the metallographic structure of the mixer blade obtained in this application is: A + B + E + D, HRC ≥ 58, and the wear rate is reduced to 0.01 - 0.02 g / 12hcm 2 。

[0097] The metallographic structure A accounts for 20% of the total volume, and the Vickers hardness is HV1200 - HV1800, which is equivalent to HRC above 75.

[0098] The metallographic structure B accounts for 8% of the total volume, and the Vickers hardness is HV900 - HV1500, which is equivalent to HRC above 70. The two metallographic structures A and B account for > 28% of the total volume, making the Rockwell hardness HRC ≥ 58 of the product, and thus enabling the product to have good anti-abrasive wear performance.

[0099] Based on the above, the mixing blade prepared by this method ensures that the product has excellent anti-abrasive wear performance on the premise of not breaking. Calculated by the wear rate, the service life of this mixer blade reaches four times that of the alloy steel blade.

[0100] Note that this preparation method is not limited to the casting of 16Mn orifice plates and high-chromium cast iron bimetals, but can also cast other metal materials, and by changing the chemical composition and metallographic structure of the cast metal, products resistant to different chemical media corrosion and with different anti-wear properties can be produced.

[0101] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limiting them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A blender blade, characterized in that, Comprising: A ductile matrix, a wear-resistant part, and a wear-resistant layer; wherein, a plurality of forming holes are formed in the ductile matrix, and the wear-resistant part is arranged in the forming holes; The wear-resistant layer covers the surfaces of the ductile matrix and the wear-resistant part; The distance between any two adjacent forming holes is 15 mm - 20 mm; The sum of the cross-sectional areas of all the forming holes of the ductile matrix along the height direction perpendicular to the ductile matrix is 25% of the cross-sectional area of the ductile matrix along its height direction; The thickness of the ductile matrix is 25% of the total thickness of the mixer blade; The ductile matrix is formed of low-alloy structural steel, and the low-alloy structural steel is 16Mn steel; Both the wear-resistant layer and the wear-resistant part are formed of high-chromium cast iron, and the high-chromium cast iron comprises the following components by mass percentage: C = 3% - 4.3%, Si = 0.8% - 1.2%, Mn = 0.5% - 0.9%, Cr = 20% - 28%, Mo = 0.3% - 0.7%, Ni = 0.3% - 0.4%, Cu = 0.3% - 0.4%, V = 0.15% - 0.2%, P < 0.06%, S < 0.06%, Re = 0.02% - 1%, Ti = 0.25%.

2. The blender blade according to claim 1, wherein The wear-resistant part and the wear-resistant layer and the ductile matrix are integrally formed by a lost foam negative pressure casting process.

3. The mixer blade according to claim 2, characterized in that, The thickness of the casting bonding layer between the wear-resistant part and the wear-resistant layer and the ductile matrix is equal to 30 μm - 100 μm.

4. The mixer blade according to claim 1, wherein The diameter of the forming hole is 20 mm - 25 mm.

5. The mixer blade according to claim 1, wherein The weight of the ductile matrix is 10% of the total weight of the wear-resistant part and the wear-resistant layer.

6. The mixer blade according to claim 1, characterized in that, The plurality of forming holes are staggered and evenly distributed.

7. The blender blade according to any one of claims 1 to 6, characterized in that, The ductile matrix has a sector plate structure, and both the inner ring edge close to the center of the circle and the outer ring edge far from the center of the circle of the sector plate structure are arc-shaped, and the sector plate structure is formed with bolt mounting holes; or The ductile matrix has a sector plate structure, and the inner ring edge close to the center of the circle of the sector plate structure is linear, and the outer ring edge far from the center of the circle of the sector plate structure is arc-shaped; a flat base is connected to the linear inner ring edge of the sector plate structure, and the base is provided with mounting through holes; or The ductile matrix has a sector plate structure, and both the inner ring edge close to the center of the circle and the outer ring edge far from the center of the circle of the sector plate structure are arc-shaped; an arc-shaped base is connected to the arc-shaped inner ring edge of the sector plate structure, and the base is provided with mounting through holes.

8. A preparation method of a blender blade, characterized in that, For forming the mixer blade according to any one of claims 1 to 7, the preparation method of the mixer blade comprises the following steps: Performing sandblasting treatment on the ductile matrix; Adopting a lost foam negative pressure casting process to respectively form the wear-resistant part and the wear-resistant layer in the forming holes and on the surface of the ductile matrix, thereby obtaining an intermediate product; Performing quenching and tempering treatments on the intermediate product in sequence; The casting temperature of the lost foam negative pressure casting process is 1360 °C - 1400 °C; The heating temperature of the quenching is 1020°C; The heating temperature of the tempering is 500°C; Among them, the tough matrix is formed of low-alloy structural steel, and the low-alloy structural steel is 16Mn steel; the wear-resistant layer and the wear-resistant part are both formed of high-chromium cast iron, and the high-chromium cast iron includes the following components by mass percentage: C = 3% - 4.3%, Si = 0.8% - 1.2%, Mn = 0.5% - 0.9%, Cr = 20% - 28%, Mo = 0.3% - 0.7%, Ni = 0.3% - 0.4%, Cu = 0.3% - 0.4%, V = 0.15% - 0.2%, P < 0.06%, S < 0.06%, Re = 0.02% - 1%, Ti = 0.25%.

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