High-strength diamond saw blade tool bit and preparation method thereof

Abstract

The invention provides a high-strength diamond saw blade tool bit and a preparation method thereof, and belongs to the technical field of diamond tools. The high-strength diamond saw blade tool bit provided by the invention is prepared from the following raw material components in parts by mass: 30 to 47 parts of Cu, 22 to 36 parts of Fe, 7 to 16 parts of Ni, 5 to 10 parts of Co, 3 to 7 parts of Sn, 6 to 9 parts of WC, 2 to 8 parts of Ti, 1 to 3 parts of Zr, 0.5 to 2 parts of Y, 0.5 to 1 part of La, 0.5 to 1 part of Ce and 6 to 15 parts of diamond. The components of the diamond tool bit and the proportion of all the components are accurately controlled, so that the obtained diamond tool bit achieves the best balance in the aspects of hardness, wear resistance, toughness and the like, and the use efficiency of the product is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of diamond tools, and in particular to a high-strength diamond saw blade segment and a preparation method thereof. Background Art

[0002] Diamond saw blade is a cutting tool widely used in the processing of hard and brittle materials such as concrete, refractory materials, stone, ceramics, etc. Diamond saw blade mainly consists of two parts: the base and the cutter head. The base is the main supporting part of the bonded cutter head.

[0003] Existing diamond saw blades have poor impact toughness performance and low wear resistance. It is difficult to achieve coordinated improvement in impact toughness and wear resistance, which limits the use efficiency of the product. Summary of the Invention

[0004] In view of this, an object of the present invention is to provide a high-strength diamond saw blade segment and a preparation method thereof.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] One of the technical solutions of the present invention is a high-strength diamond saw blade segment, wherein the raw materials include the following components, calculated by mass: 30-47 parts of Cu, 22-36 parts of Fe, 7-16 parts of Ni, 5-10 parts of Co, 3-7 parts of Sn, 6-9 parts of WC, 2-8 parts of Ti, 1-3 parts of Zr, 0.5-2 parts of Y, 0.5-1 parts of La, 0.5-1 parts of Ce and 6-15 parts of diamond.

[0007] In a preferred embodiment of the present invention, the raw materials include the following components, calculated by mass: 33-40 parts of Cu, 25-31 parts of Fe, 8-14 parts of Ni, 5-7 parts of Co, 3-6 parts of Sn, 7-9 parts of WC, 3-6 parts of Ti, 2-3 parts of Zr, 1-2 parts of Y, 0.5-0.8 parts of La, 0.5-0.8 parts of Ce and 8-12 parts of diamond.

[0008] In a preferred embodiment of the present invention, the raw materials include the following components, calculated by mass: 35 parts of Cu, 29 parts of Fe, 10 parts of Ni, 6 parts of Co, 5 parts of Sn, 8 parts of WC, 4 parts of Ti, 3 parts of Zr, 1 part of Y, 0.7 parts of La, 0.7 parts of Ce and 12 parts of diamond.

[0009] In the raw material ratio of the high-strength diamond saw blade segment of the present invention, the selection and proportion of each component are carefully designed to ensure that the comprehensive performance of the segment is optimal. A reasonable formula is the key to ensuring the high performance of the segment:

[0010] 1.Cu (copper): 30-47 parts

[0011] Function: Copper has excellent thermal conductivity and toughness, improving the thermal conductivity and wear resistance of the blade while also lowering the sintering temperature. Increasing the copper content reduces the blade's hardness and wear resistance. While this further improves thermal conductivity, it may sacrifice strength and wear resistance. Reducing the copper content also worsens thermal conductivity, making the diamond more susceptible to thermal damage at high temperatures. Furthermore, the blade's toughness decreases, making it more susceptible to breakage.

[0012] 2.Fe (iron): 22-36 parts

[0013] Effect: Iron increases the hardness and strength of the cutter head and has a good affinity with diamond, enhancing its grip. Increasing the iron content further increases the hardness and strength of the cutter head, but can also cause it to become brittle, reduce its toughness, and be prone to breakage under high loads. Reducing the iron content significantly reduces the hardness and strength of the cutter head, weakening its grip on the diamond and causing it to fall out.

[0014] 3.Ni (nickel): 7-16 parts

[0015] Function: Nickel can improve the toughness and impact resistance of the cutter head, while enhancing the wear resistance of the carcass. If the proportion of nickel is reduced, the toughness of the cutter head will decrease, the impact resistance will deteriorate, and it will be easily damaged under high load.

[0016] 4. Co (cobalt): 5-10 parts

[0017] Function: Cobalt is a relatively hard metal that enhances the toughness and impact resistance of the cutter head while also improving wear resistance and thermal stability. Reducing the Co content will reduce the toughness and wear resistance of the cutter head, deteriorate its thermal stability, and shorten its service life.

[0018] 5.Sn (tin): 3-7 parts

[0019] Function: Tin strengthens the copper matrix and interacts with titanium to improve its wettability to diamond, enhancing the bond between the matrix and diamond. Increasing the Sn content further improves the wettability of the cutter head to diamond, but reduces its overall strength. Decreasing the Sn content impairs the wettability of the cutter head to diamond, weakening the bond between the matrix and diamond, and causing diamond shedding.

[0020] 6.WC (tungsten carbide): 6-9 parts

[0021] Function: Tungsten carbide can significantly improve the hardness and wear resistance of the cutter head, and at the same time, as a skeleton metal, it strengthens the overall structure of the cutter head.

[0022] 7.Ti (titanium): 2-8 parts

[0023] Function: Titanium can improve the hardness and wear resistance of the blade, and at the same time, it interacts with elements such as tin to enhance its wettability to diamond. If the proportion of Ti is reduced, the hardness and wear resistance of the blade will decrease, and its wettability to diamond will deteriorate.

[0024] 8. Zr (zirconium): 1-3 parts

[0025] Function: Zirconium can improve the toughness and wear resistance of the cutter head, while enhancing the thermal crack resistance of the matrix. If the addition of Zr is omitted, the toughness and thermal crack resistance of the cutter head will decrease, and cracks will easily appear at high temperatures.

[0026] 9. Y (yttrium): 0.5-2 parts

[0027] Function: Yttrium is a rare earth element that can improve the strength and wear resistance of the matrix, while improving its wettability to diamond.

[0028] 10.La (Lanthanum): 0.5-1 part

[0029] Function: Lanthanum can reduce the wetting angle of the matrix to the diamond, enhance the bonding force between the matrix and the diamond, and improve the wear resistance of the cutter head.

[0030] 11. Ce (Cerium): 0.5-1 part

[0031] Function: Cerium can improve the wear resistance and thermal crack resistance of the matrix, while enhancing its wettability to diamond.

[0032] In a preferred embodiment of the present invention, the diamond has a particle size of 30-50 mesh.

[0033] A second technical solution of the present invention is a method for preparing the above-mentioned high-strength diamond saw blade segment, comprising the following steps:

[0034] After the above raw materials are prepared and mixed evenly, a mixture is obtained;

[0035] The mixed material is press-formed and hot-pressed and sintered to obtain the high-strength diamond saw blade segment.

[0036] In a preferred embodiment of the present invention, the pressure during press forming is 2500-3000 tons; the hot pressing sintering is a three-stage hot pressing sintering, first heating to 500-550°C at a heating rate of 15-20°C / min and holding for 0.5-1 hour, then heating to 600-700°C at a heating rate of 10-15°C / min and holding for 2-3 hours, and finally heating to 850-950°C at a heating rate of 5-10°C / min and holding for 2.5-3.5 hours; the pressure of hot pressing sintering is 250-350kg / cm 2 .

[0037] The present invention helps to suppress excessive growth of grains through segmented hot pressing sintering, thereby obtaining a fine-grained structure and a high-density, fine-grained microstructure.

[0038] The third technical solution of the present invention is a diamond saw blade, comprising a base and the above-mentioned high-strength diamond saw blade head.

[0039] The present invention discloses the following technical effects:

[0040] The present invention achieves an optimal balance in terms of hardness, wear resistance and toughness of the obtained diamond tool segment by precisely controlling the components of the diamond tool segment and the proportions of the components, thereby improving the use efficiency of the product. DETAILED DESCRIPTION

[0041] Various exemplary embodiments of the present invention will now be described in detail. This detailed description should not be considered as limiting the present invention, but rather as a more detailed description of certain aspects, features, and embodiments of the present invention.

[0042] It should be understood that the terms described herein are intended only to describe particular embodiments and are not intended to limit the present invention. In addition, for numerical ranges herein, it should be understood that each intermediate value between the upper and lower limits of the range is also specifically disclosed. The intermediate value within any stated value or stated range, and each smaller range between any other stated value or intermediate value within the stated range, is also encompassed within the present invention. The upper and lower limits of these smaller ranges may be independently included or excluded within the scope.

[0043] Unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art. Although only preferred methods and materials are described herein, any methods and materials similar or equivalent to those described herein may also be used in the practice or testing of the present invention. All documents mentioned in this specification are incorporated by reference to disclose and describe the methods and / or materials associated with the documents. In the event of any conflict with any incorporated document, the contents of this specification shall prevail.

[0044] It will be apparent to those skilled in the art that various modifications and variations may be made to the specific embodiments described herein without departing from the scope or spirit of the invention. Other embodiments will be apparent to those skilled in the art from the description of the invention. The description and examples are intended to be exemplary only.

[0045] The words “include,” “including,” “have,” “contain,” etc. used in this document are open-ended terms, meaning including but not limited to.

[0046] Unless otherwise specified, the technical solutions described in the present invention are all conventional solutions in the field, and the reagents or raw materials used, unless otherwise specified, are purchased from commercial channels or have been disclosed.

[0047] In order to better understand the present invention, the content of the present invention is further illustrated below in conjunction with the examples, but the content of the present invention is not limited to the following examples.

[0048] Example 1

[0049] (1) 40 parts of Cu, 35 parts of Fe, 12 parts of Ni, 7 parts of Co, 5 parts of Sn, 7 parts of WC, 3 parts of Ti, 1 part of Zr, 1.5 parts of Y, 0.5 parts of La, 0.6 parts of Ce and 15 parts of diamond were prepared and mixed uniformly to obtain a mixture;

[0050] (2) The mixed material was placed in a mold and pressed (the pressure was 2500 tons), and then hot pressed and sintered (first heated to 550°C at a heating rate of 20°C / min and kept at this temperature for 0.5 hours, then heated to 650°C at a heating rate of 10°C / min and kept at this temperature for 3 hours, and finally heated to 850°C at a heating rate of 5°C / min and kept at this temperature for 3.5 hours; the pressure of hot pressing and sintering was 250kg / cm 2 ).

[0051] Example 2

[0052] The only difference from Example 1 is that 37 parts of Cu, 31 parts of Fe, 8 parts of Ni, 5 parts of Co, 6 parts of Sn, 9 parts of WC, 3 parts of Ti, 2 parts of Zr, 0.5 parts of Y, 0.8 parts of La, 0.5 parts of Ce and 11 parts of diamond are prepared. Other steps and parameters are the same as those in Example 1.

[0053] Example 3

[0054] The only difference from Example 1 is that the ingredients are prepared according to 35 parts of Cu, 29 parts of Fe, 10 parts of Ni, 6 parts of Co, 5 parts of Sn, 8 parts of WC, 4 parts of Ti, 3 parts of Zr, 1 part of Y, 0.7 parts of La, 0.7 parts of Ce and 12 parts of diamond. The other steps and parameters are the same as those in Example 1.

[0055] Comparative Example 1

[0056] The only difference from Example 1 is that the amount of copper is 20 parts, and the other steps and parameters are the same as those in Example 1.

[0057] Comparative Example 2

[0058] The only difference from Example 1 is that nickel is 3 parts, and other steps and parameters are the same as those in Example 1.

[0059] Comparative Example 3

[0060] The only difference from Example 1 is that the amount of cobalt is 1 part, and the other steps and parameters are the same as those in Example 1.

[0061] Comparative Example 4

[0062] The only difference from Example 1 is that WC is 3 parts, and the other steps and parameters are the same as those in Example 1.

[0063] Comparative Example 5

[0064] The only difference from Example 1 is that WC is 12 parts, and the other steps and parameters are the same as those in Example 1.

[0065] Comparative Example 6

[0066] The only difference from Example 1 is that Ti is 0.5 parts, and the other steps and parameters are the same as those in Example 1.

[0067] Comparative Example 7

[0068] The only difference from Example 1 is that the addition of Zr is omitted, and the other steps and parameters are the same as those in Example 1.

[0069] Comparative Example 8

[0070] The only difference from Example 1 is that the addition of Y, La and Ce is omitted, and the other steps and parameters are the same as those in Example 1.

[0071] Comparative Example 9

[0072] The only difference from Example 1 is that Y is 6 parts, and the other steps and parameters are the same as those in Example 1.

[0073] Comparative Example 10

[0074] The only difference from Example 1 is that La is 5 parts, and the other steps and parameters are the same as those in Example 1.

[0075] Comparative Example 11

[0076] The only difference from Example 1 is that Ce is 5 parts, and the other steps and parameters are the same as those in Example 1.

[0077] The performance of the tool tips prepared in Example 1 and the comparative example was tested. The tool tips were each 1.8 mm thick and were welded to a 250 mm diameter circular substrate. The substrate thickness was 2 mm. Density was tested according to GB / T 5163-2006, impact toughness was tested according to GBT 5318-1985, bending strength was tested according to GB / T 5319-2002, and hardness was tested according to GB / T 230.1-2009. Tool wear ratio was tested according to JB-T 3235-1999. The results are shown in Table 1.

[0078] Table 1

[0079]

[0080]

[0081] As can be seen from the above examples and comparative examples, the present invention achieves an optimal balance of hardness, wear resistance, and toughness in the cutting head by precisely controlling each component and its ratio. Adjusting the ratio of any one component could disrupt this balance, leading to reduced cutting head performance, affecting service life and cutting efficiency.

[0082] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A high-strength diamond saw blade segment, characterized in that: The raw materials include the following components in parts by mass: 30-47 parts of Cu, 22-36 parts of Fe, 7-16 parts of Ni, 5-10 parts of Co, 3-7 parts of Sn, 6-9 parts of WC, 2-8 parts of Ti, 1-3 parts of Zr, 0.5-2 parts of Y, 0.5-1 parts of La, 0.5-1 parts of Ce and 6-15 parts of diamond.

2. The high-strength diamond saw blade segment according to claim 1, characterized in that: The raw materials include the following components by mass: 33-40 parts of Cu, 25-31 parts of Fe, 8-14 parts of Ni, 5-7 parts of Co, 3-6 parts of Sn, 7-9 parts of WC, 3-6 parts of Ti, 2-3 parts of Zr, 1-2 parts of Y, 0.5-0.8 parts of La, 0.5-0.8 parts of Ce and 8-12 parts of diamond.

3. The high-strength diamond saw blade segment according to claim 1, characterized in that: The raw materials include the following components in parts by mass: 35 parts of Cu, 29 parts of Fe, 10 parts of Ni, 6 parts of Co, 5 parts of Sn, 8 parts of WC, 4 parts of Ti, 3 parts of Zr, 1 part of Y, 0.7 parts of La, 0.7 parts of Ce and 12 parts of diamond.

4. The high-strength diamond saw blade segment according to claim 1, characterized in that: The particle size of the diamond is 30-50 mesh.

5. A method for preparing the high-strength diamond saw blade segment according to any one of claims 1 to 4, characterized in that: The following steps are involved: After the raw materials are prepared according to claim 1, they are mixed uniformly to obtain a mixture; The mixed material is press-formed and hot-pressed and sintered to obtain the high-strength diamond saw blade segment.

6. The preparation method according to claim 5, characterized in that The pressure during press forming is 2500-3000 tons; the hot pressing sintering is a three-stage hot pressing sintering, first heating to 500-550℃ at a heating rate of 15-20℃ / min and keeping warm for 0.5-1 hour, then heating to 600-700℃ at a heating rate of 10-15℃ / min and keeping warm for 2-3 hours, and finally heating to 850-950℃ at a heating rate of 5-10℃ / min and keeping warm for 2.5-3.5 hours; the pressure during hot pressing sintering is 250-350kg / cm 2 .

7. A diamond saw blade, characterized in that: The invention comprises a substrate and the high-strength diamond saw blade segment according to any one of claims 1 to 4.

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