Pore-forming agent for ceramic bond grinding tool product as well as preparation method and application of pore-forming agent

Abstract

The invention relates to a pore-forming agent for a ceramic bond grinding tool product and a preparation method and application of the pore-forming agent, and belongs to the technical field of grinding tool production and manufacturing. The pore-forming agent for the ceramic bond grinding tool product is prepared from the following components in percentage by mass: 40%-50% of C14-C18 straight-chain alkyl alcohol, 10%-20% of calcium oxide, 35%-45% of C17-C27 straight-chain alkane and 2%-5% of water glass. According to a ceramic grinding wheel prepared by adopting the pore forming agent for the ceramic bond grinding tool product, the grinding efficiency is improved by at least 50%, the grinding ratio is improved by at least 1.5 times, meanwhile, the finishing frequency of the ceramic grinding wheel is greatly reduced, and the problems that the ceramic grinding wheel is not sharp, the grinding efficiency is low, and the grinding wheel is prone to being blocked and even burns a workpiece in the grinding process can be effectively solved.

Description

Technical Field

[0001] The invention discloses a pore-forming agent for ceramic bonded abrasive tool products, a preparation method and an application thereof, and belongs to the technical field of abrasive tool production and manufacturing. Background Art

[0002] With the advancement of science and technology and the continuous growth of human needs, the application of metal materials in various fields has become more and more extensive, and the performance of traditional metal materials (such as strength, hardness, thermal conductivity, etc.) has been changed and improved; in addition, with the rapid development of artificial intelligence and the Internet of Things, the intelligence and functionalization of metal materials have become increasingly important. For example, by adding nanoparticles to metal materials, it can be made to have self-healing functions and enhance the service life of the material. The application requirements of metal materials are becoming more and more diversified. Not only must they have excellent mechanical properties, but also electromagnetic properties, optical properties, chemical properties, etc. By adding different alloying elements to metal materials, regulating the grain size, and other methods, the various properties of metal materials can be improved to meet the needs of different fields.

[0003] Inorganic non-metallic materials, such as glass, ceramics, and rubber, are rapidly developing towards high performance, multi-functions, and low energy consumption. Furthermore, demand for materials for extreme environments has surged. For example, silicon nitride bearings are replacing metal components in the aerospace industry, with a temperature limit exceeding 1600°C. Products from Japan's NSK have been used in SpaceX engine turbo pumps. Borosilicate radiation-resistant glass developed by Russia can withstand temperatures exceeding 10°C. 8 Gray dose radiation has become a key component of the International Thermonuclear Experimental Reactor (ITER). Inorganic non-metallic materials, with their unique physical and chemical properties, play an irreplaceable role in various fields, and market demand continues to grow.

[0004] With the change and improvement of the performance of metal materials and inorganic non-metallic materials, there will inevitably be higher requirements for the performance of bonded abrasive tools used in the processing and manufacturing industry, such as the grinding efficiency, service life and surface quality of the workpiece after grinding. In recent years, the market demand for difficult-to-grind materials has been gradually increasing. They are widely used in industries such as industry, machinery, and construction, mainly for resisting wear and extending the service life of equipment. At present, commonly used difficult-to-grind materials include high manganese steel, alloy wear-resistant steel, wear-resistant cast iron, wear-resistant rubber and composite wear-resistant materials. For the processing and manufacturing industry, difficult-to-grind materials are prone to low grinding efficiency and grinding chips clogging the grinding wheel during the grinding process, resulting in severe wear of the grinding wheel, and the geometric accuracy or surface roughness of the workpiece after grinding does not meet the requirements. The workpiece may even be burned, cracked or even broken.

[0005] Difficult-to-grind materials usually have the characteristics of high hardness, high strength, high brittleness or high chemical activity. These characteristics make it more demanding on equipment and process during processing, which easily leads to wear of grinding tools and reduced processing accuracy. For example, high-vanadium high-speed steel, nickel-based or cobalt-based heat-resistant alloys, die steel and other metal materials with high hardness, or non-metallic materials such as polyurethane, rubber, and ceramics, most of them require porous grinding wheels to solve the problems of workpiece burns and severe wear of grinding tools during grinding (the burnt workpieces such as Figure 1 shown).

[0006] In recent years, although some methods for manufacturing pore-forming agents have been disclosed in the prior art, the density difference between the pore-forming agent and other materials is large, which makes the pore-forming agent easy to agglomerate and makes it difficult to produce abrasive products with uniformly dispersed pores. In addition, the pore-forming agents developed are only suitable for resin-bonded abrasive products and are not suitable for high-temperature sintered ceramic-bonded abrasive products.

[0007] The Chinese invention patent application document with publication date of December 9, 2022 and publication number CN115448632A discloses a pore-forming agent for magnesia abrasives and its production process. The pore-forming agent is obtained by mixing, stirring, drying, and finally granulating water-soluble crystals, alcohol-soluble linear resins, and anhydrous ethanol. However, this pore-forming agent has a low density and is easy to agglomerate, so it is not suitable for use in press-molded ceramic bond abrasive products.

[0008] The Chinese invention patent application document with publication date of December 24, 2024 and publication number CN119175661A discloses a stacked hollow glass microsphere pore-forming agent, its preparation method and application. Pore-forming agents of different particle sizes are prepared by melting, cooling and crushing hollow glass microspheres and wax. This pore-forming agent is also not suitable for press-formed ceramic bond abrasive products due to its low density, and this patent publicly states that the developed pore-forming agent is suitable for use in resin bond abrasive tools.

[0009] With the rapid development of science and technology, the performance of materials is also changing and improving. The manufacturing industry has increasingly stringent requirements for grinding efficiency, dressing frequency, and surface quality of ground workpieces. In the future, the requirements for the performance and effectiveness of grinding tools will undoubtedly become even higher. Therefore, the development of specialized pore-forming agents suitable for use with vitrified bonded abrasive products is crucial to solving problems such as low efficiency, frequent dressing, tool clogging, and even workpiece burns during the use of vitrified bonded abrasive products. Summary of the Invention

[0010] The first object of the present invention is to provide a pore-forming agent for vitrified bonded abrasive products, and to provide a special pore-forming agent suitable for vitrified bonded abrasive products and capable of achieving uniform pore formation.

[0011] The second object of the present application is to provide a preparation method of a pore-forming agent for a ceramic bond abrasive tool product, and to provide a preparation method of a pore-forming agent for a ceramic bond abrasive tool product with simple operation.

[0012] The third object of the present application is to provide an application of the pore-forming agent for a ceramic bond abrasive tool product in the preparation of a ceramic bond abrasive tool product, so as to solve the problems of low grinding efficiency, frequent dressing, wheel clogging and workpiece burning in the process of grinding workpieces by the ceramic grinding wheel in the prior art.

[0013] In order to achieve the above objects, the technical scheme of the pore-forming agent for a ceramic bond abrasive tool product in the present application is as follows:

[0014] The pore-forming agent for a ceramic bond abrasive tool product is composed of the following components with mass fractions: 14 ~ C 18 Straight-chain alkyl alcohol 40%-50%, calcium oxide 10%-20%, C 17 ~ C 27 Straight-chain alkane 35%-45%, water glass 2%-5%.

[0015] The pore-forming agent for a ceramic bond abrasive tool product is an opening invention. Through a large amount of research, it is found that the main material of the commonly used pore-forming agent cannot be a high-temperature-resistant material, because the high-temperature-resistant material will remain in the structure of the ceramic bond abrasive tool product during high-temperature sintering, and cannot effectively form pores. Finally, the ceramic bond abrasive tool product manufactured cannot effectively hold and remove chips during the process of grinding workpieces, resulting in low grinding efficiency, easy clogging of the grinding wheel, and even burning of the workpiece.

[0016] Based on the above findings, the pore-forming agent for a ceramic bond abrasive tool product is not a single organic or inorganic material in the prior art, but is a complex of organic carbon alcohol and alkane and inorganic calcium oxide. For example, hexadecanol has the chemical formula C 16 H 34 O, is a colorless solid with a melting point of 50℃, which can be in a good molten state at a lower temperature, so that it can be better mixed with other substances. In addition, its boiling point is 344℃, which can form cavities during high-temperature sintering, and has a good pore-forming effect. For example, docosane has the chemical formula C 22 H 46Colorless solid, melting point 44.4℃, can be better in the lower temperature melting state, at the same time can form a better stable state with hexadecanol, in addition, its boiling point 368.6℃, in the process of high temperature sintering, can form a good pore effect. Calcium oxide is an inorganic material, in the compound pore-forming agent plays a role in the skeleton, ceramic bond abrasive tool products after high temperature sintering, remaining a small amount of calcium oxide in the pore-forming agent to create the hole, the ceramic bond abrasive tool products prepared in the process of grinding workpiece, its small amount of calcium oxide in the hole can react with water, generate slightly soluble in water calcium hydroxide, at the same time also into the hole with the grinding dust together into the cooling liquid, better play the role of chip removal, avoid the problem of burning workpiece and abrasive blockage. Finally, the water glass, its state is liquid, as a dispersing agent, can make the compound pore-forming agent in the melting state better dispersion uniform.

[0017] As a further improvement, consisting of the following mass fraction of components: hexadecanol 40%-50%, calcium oxide 10%-20%, docosane 35%-45%, water glass 2%-5%.

[0018] As a further improvement, the particle size of the calcium oxide is not more than 100 mesh.

[0019] As a further improvement, the particle size of the pore-forming agent is 12-30 mesh.

[0020] In order to achieve the above object, the technical scheme of a kind of ceramic bond abrasive tool product pore-forming agent preparation method in the present application is:

[0021] A kind of the ceramic bond abrasive tool product pore-forming agent preparation method, C 14 ~C 18 Straight chain alkyl alcohol, C 17 ~C 27 Straight chain alkane, calcium oxide and water glass are heated to 50-70 DEG C, mixed uniformly, cooling granulation.

[0022] The beneficial effects of the above technical scheme are that the ceramic bond abrasive tool product pore-forming agent of the present application has wide raw material source range, low cost, and simple preparation process, suitable for large-scale industrial production.

[0023] In order to achieve the above object, the technical scheme of a kind of ceramic bond abrasive tool product pore-forming agent in the present application is:

[0024] A kind of ceramic bond abrasive tool product pore-forming agent in the preparation of ceramic bond abrasive tool product application.

[0025] The beneficial effects of the above technical solution are that the ceramic grinding wheel special pore-forming agent is used to increase the grinding efficiency of the prepared ceramic abrasive tool product by at least 50%, increase the grinding ratio by at least 1.5 times, greatly reduce the dressing frequency and dressing amount of the abrasive tool, avoid the clogging of the abrasive tool, and avoid the burning of the workpiece.

[0026] As a further improvement, the density of the mixture used to prepare the ceramic bond abrasive tool product is matched with the pore-forming agent for the ceramic bond abrasive tool product.

[0027] The beneficial effects of the above technical solution are that the particle size of the pore-forming agent is generally 0.5mm-5mm, i.e. 500μm-5000μm, and the particle size range of the abrasive material of the main body material of the ceramic bond abrasive tool product is 70μm-800μm, the particle size of the pore-forming agent is 0.5 to 70 times the particle size of the abrasive material, and in the case of a large particle size deviation, the density of the pore-forming agent needs to be matched with the density of the mixture, i.e. the mixture of the abrasive material and the bond. The density range of the general mixture is 2.1g / cm 3 -3.1g / cm 3 If the density deviation of the pore-forming agent for the ceramic bond abrasive tool product and the mixture is large, the phenomenon of segregation of the pore-forming agent is easy to occur, which further causes the waste ceramic bond abrasive tool product.

[0028] Specifically, in the actual use process, the density of the ceramic bond abrasive tool product mixture prepared is adjusted to adjust the density of the pore-forming agent, such as the density of the mixture is a g / cm 3 Then, the amount of each component is adjusted within the formulation range to make the density reach a±0.1g / cm 3 . BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is an actual diagram of the burning of the workpiece in the grinding process in the background art of the present application (wherein the left side is the sampling position of the burning sample, and the right side is the vertical section diagram of the grinding burn) ;

[0030] Figure 2 It is a ceramic grinding wheel prepared by using the pore-forming agent of Comparative Example 1 in Experimental Example 1 of the present application;

[0031] Figure 3 It is a ceramic grinding wheel prepared by using the pore-forming agent of Example 2 in Experimental Example 1 of the present application;

[0032] Figure 4 It is a ceramic grinding wheel prepared by using the pore-forming agent of Example 3 in Experimental Example 1 of the present application.

[0033] Figure 5 It is a ceramic grinding wheel prepared by using the pore-forming agent of Example 1 in Experimental Example 1 of the present application. DETAILED DESCRIPTION

[0034] With the development of society and the advancement of science and technology, the requirements of various industries for metal materials and non-metallic materials are getting higher and higher, and then the requirements for bonded abrasive tools (such as grinding wheels) used in the processing and manufacturing industry are also gradually increasing. According to the different classifications of binders, common ones are ceramic grinding wheels, resin grinding wheels and rubber grinding wheels. Among them, ceramic grinding wheels have the advantages of high strength, good heat resistance, sharp cutting and high grinding efficiency and are widely used. However, the pore-forming agents of single organic or inorganic substances commonly used at present are not suitable for ceramic grinding wheels. Based on this, the present invention adopts two organic substances and one inorganic substance to compound, and provides a pore-forming agent for ceramic bonded abrasive products.

[0035] The present invention will be further described below in conjunction with specific embodiments. It should be noted that, unless otherwise specified, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments. The equipment and raw materials used are all commercially available or commonly used in the art. The methods in the following embodiments are all conventional methods in the art unless otherwise specified.

[0036] The specifications and manufacturers of the materials used in the following examples and comparative examples of the present invention are as follows:

[0037] (1) Hexadecanol

[0038] Hexadecanol, colorless crystals, manufacturer: Shanghai Shengyue Co., Ltd., its main chemical components are shown in Table 1.

[0039] Table 1

[0040] Element C 16 H 34 O]]> Other alkanes Technical indicators ≥97％ ＜1.0％

[0041] (2) Calcium oxide

[0042] Calcium oxide (analytical grade), white powder, manufacturer: Xilong Chemical Reagent Co., Ltd., its main chemical components are shown in Table 2.

[0043] Table 2

[0044]

[0045] (3) Docosane

[0046] Docosane, colorless solid, produced by Nanjing Fengxinyuan Co., Ltd., its main chemical components are shown in Table 3.

[0047] Table 3

[0048] Element <![CDATA[C 22 H 46 ]]> Other alkanes Technical indicators ≥99％ ＜1.0％

[0049] (4) Water glass

[0050] Water glass is a liquid, produced by Shandong Yuda New Materials Co., Ltd. Its main technical indicators are shown in Table 4.

[0051] Table 4

[0052] <![CDATA[常温比重(g / cm 3 )]]> free SiO2 moisture 1.38-1.39 ≤1.3％ ＜55％

[0053] 1. Specific embodiments of a pore-forming agent for a vitrified bonded abrasive product and a preparation method thereof according to the present invention:

[0054] Example 1

[0055] The pore-forming agent for vitrified bonded abrasive products of this embodiment is composed of the following raw materials in percentage by weight: 45% hexadecanol, 15% calcium oxide, 36% docosane, and 4% water glass.

[0056] The preparation method of the pore-forming agent for a vitrified bonded abrasive product of this embodiment is as follows: calcium oxide is passed through a 100-mesh sieve, then heated to 60° C. together with hexadecanol, docosane, and water glass, and stirred at a stirring speed of 25 rpm / min for 1.5 hours. The mixture is cooled to room temperature, and round granules with a mesh size of 12#-30# are produced using a granulator.

[0057] Example 2

[0058] The pore-forming agent for vitrified bonded abrasive products of this embodiment is composed of the following raw materials in percentage by weight: 50% hexadecanol, 10% calcium oxide, 37% docosane, and 3% water glass.

[0059] The preparation method of the pore-forming agent of this embodiment is as described in Example 1.

[0060] Example 3

[0061] The pore-forming agent for vitrified bonded abrasive products of this embodiment is composed of the following raw materials in weight percentage: 40% hexadecanol, 20% calcium oxide, 35% docosane, and 5% water glass.

[0062] The preparation method of the pore-forming agent of this embodiment is as described in Example 1.

[0063] C 14 ~C 18 The physical properties of linear alkyl alcohols are similar and their densities are very similar. 17 ~C 27 The physical properties of straight-chain alkanes are similar and their densities are very close. In other implementations, the hexadecanol in the above embodiment can be replaced with tetradecanol, octadecanol, etc., and the docosane can be replaced with heptadecane, eicosane, pentacosane, heptacosane, etc., and the same similar use effects can be achieved.

[0064] 2. Comparative Example

[0065] Comparative Example 1

[0066] The pore-forming agent of this comparative example is composed of the following raw materials in weight percentage: 40% hexadecanol and 60% docosane.

[0067] The preparation method of the pore-forming agent of this comparative example is as described in Example 1.

[0068] 3. Experimental Example Application of Pore-Forming Agent for Vitrified Bond Abrasive Products in the Preparation of Vitrified Bond Abrasive Products

[0069] Comparison of pore-forming effects in Experimental Example 1

[0070] In this experimental example, the pore-forming agents of Examples 1 to 3 and Comparative Example 1 were used to prepare vitrified bond abrasive products (ceramic grinding wheels) to compare the pore-forming effects of different pore-forming agents. The specific operation is as follows:

[0071] The pore-forming agents 12#-30# developed in Examples 1-3 and Comparative Example 1 were used to prepare vitrified bonded porous grinding wheels. The abrasive used in the grinding wheels can be corundum, silicon carbide, diamond, or CBN, and the bond used can be a corresponding bond specifically formulated for vitrified grinding wheels. The bond used in Examples 1-1, 2-2, 3-3, and Comparative Example 1-1 is imported Japanese SONOTEC vitrified grinding wheel bond, model SC1802. The abrasive used in Examples 1-1, 2-2, 3-3, and Comparative Example 1-1 is black silicon carbide 60#, or C60#, manufactured by Zhengzhou Xinli Wear-Resistant Materials Co., Ltd. Its main technical specifications are shown in Table 5.

[0072] Table 5

[0073]

[0074]

[0075] 1. Example 1-1

[0076] The pore-forming agents 12#-30# prepared in Example 1 were used to manufacture vitrified bonded abrasive products (ceramic grinding wheels). The grinding wheel formula, by weight percentage, was: C60# (abrasive) 90%, SC1802 (binder) 10%, dextrin powder accounted for 20‰ of the total mass of the abrasive and binder, and had a specific gravity of 1.13 g / cm 3 The dextrin liquid accounts for 20‰ of the total mass of the abrasive and binder, and the pore-forming agent 12#-30# accounts for 60‰ of the total mass of the abrasive and binder.

[0077] The preparation method of ceramic bond abrasive products comprises the following specific steps:

[0078] (1) First, add the wetting agent dextrin liquid to the abrasive C60# and mix it using a three-dimensional mixer for 15 minutes. Then add the binder and dextrin powder and mix and stir for 25 minutes. Finally, pass it through a 16-mesh sieve and let it sit for 36 hours.

[0079] (2) Using a 200-ton cold press to press and form the material under a pressure of 8 MPa for 30 seconds, and then drying it at 110°C for 50 hours; sintering it in a high-temperature sintering furnace at a sintering temperature of 850°C for 32 hours to obtain a ceramic grinding wheel.

[0080] 2. Example 2-2

[0081] The pore-forming agents 12#-30# prepared in Example 2 were used to manufacture vitrified bond abrasive products (ceramic grinding wheels). The formula and preparation method of Example 2-2 were the same as those of Example 1-1.

[0082] 3. Example 3-3

[0083] The pore-forming agents 12#-30# prepared in Example 3 were used to manufacture vitrified bond abrasive products (ceramic grinding wheels). The formula and preparation method of Example 3-3 were the same as those of Example 1-1.

[0084] 4. Comparative Example 1-1

[0085] The pore formers 12#-30# prepared in Comparative Example 1 were used to manufacture vitrified bond abrasive products (vitrified grinding wheels). The formulation and preparation method of Comparative Example 1-1 were the same as those of Example 1-1.

[0086] The ceramic grinding wheels prepared by using the pore-forming agents of Comparative Example 1 and Examples 1 to 3 are as follows: Figures 2 to 5 shown.

[0087] Depend on Figure 2 It can be seen that the pore-forming agent used in Comparative Example 1-1 consists of only two organic substances: 40% hexadecanol and 60% docosane. The density of hexadecanol is 0.8176 g / mL, and the density of docosane is 0.778 g / mL. The density of the pore-forming agent prepared from these two organic substances is significantly lower. During use, such a pore-forming agent is likely to cause significant upward segregation of pores, that is, the pore-forming agent is likely to unevenly aggregate in the upper part of the ceramic grinding wheel in the thickness direction. Figure 2 It can be clearly seen that the upper portion of the prepared ceramic grinding wheel has many large holes due to the large upward accumulation of the pore-forming agent. When grinding workpieces, ceramic grinding wheels prepared with such pore-forming agents can experience significant fluctuations in grinding efficiency, sharpness, grinding ratio, and surface quality of the workpiece after grinding. They can even burn the workpiece, thus failing to meet grinding requirements.

[0088] Depend on Figure 3It can be seen that the content of 50% of the pore-forming agent hexadecanol used in Example 2-2 is relatively high, and the standard density of hexadecanol is 0.834 g / cm 3 The content of calcium oxide is low, resulting in a lower density of the prepared pore-forming agent, which is lighter than the mixture. During use, it is easy to cause upward segregation, that is, the pore-forming agent tends to gather unevenly in the upper part of the ceramic grinding wheel in the thickness direction.

[0089] Depend on Figure 4 It can be seen that the content of 20% of calcium oxide as the pore-forming agent used in Example 3-3 is relatively high, and the standard density of calcium oxide is 3.35 g / cm 3 , resulting in a higher density of the prepared pore-forming agent, which is heavier than the mixed material. During use, it is easy to cause the pores to segregate downward, that is, the pore-forming agent tends to gather unevenly in the lower part of the ceramic grinding wheel in the thickness direction.

[0090] Depend on Figure 5 It can be seen that the density of the pore-forming agent used in Example 1-1 is moderate and has good consistency with the density of the mixture (i.e., they match each other). Such a pore-forming agent is easy to be evenly distributed in the organizational structure during use, and will not cause segregation of the pore-forming agent. That is, the pore-forming agent is easy to form evenly distributed voids in the organizational structure of the ceramic grinding wheel. Such a ceramic grinding wheel will achieve the best grinding effect in the process of grinding the workpiece, in terms of grinding efficiency, grinding wheel sharpness, dressing frequency, grinding ratio, and surface quality of the workpiece after grinding.

[0091] In summary, the pores of the ceramic grinding wheel prepared in Comparative Example 1-1 are very obviously segregated upward, while the pores of the ceramic grinding wheels prepared in Examples 2-2 and 3-3 are partially segregated upward and downward, respectively. The pores of the ceramic grinding wheel prepared in Example 1-1 are evenly distributed. In actual use, the ceramic grinding wheel of Comparative Example 1-1 will have problems such as large fluctuations in grinding efficiency, grinding wheel sharpness, grinding ratio and surface quality of the workpiece after grinding during the process of grinding the workpiece, and may even burn the workpiece, thereby failing to meet the grinding requirements. However, this phenomenon will be improved in the ceramic grinding wheels of Examples 2-2 and 3-3, and the grinding effect will be improved compared with the ceramic grinding wheel of Comparative Example 1-1. In the process of grinding the workpiece, the grinding efficiency, grinding wheel sharpness, dressing frequency, grinding ratio and surface quality of the workpiece after grinding of the ceramic grinding wheel of Example 1-1 will achieve the best grinding use effect. This shows that the pore-forming agent in Comparative Example 1 cannot be used to prepare ceramic grinding wheels. When using the pore-forming agent in the embodiment of the present invention to prepare ceramic grinding wheels, it is necessary to adjust the density of the pore-forming agent to be consistent with the density of the ceramic grinding wheel mixture to ensure that the ceramic grinding wheel with the best grinding effect is obtained.

[0092] The pore-forming agent special for ceramic grinding wheel prepared according to the embodiment 1-1 is used to prepare a ceramic grinding wheel for grinding a workpiece high-temperature alloy plate, and the specific material brand is AMS5596, and the roughness requirement of the workpiece after grinding is Ra0.6; compared with the ceramic grinding wheel prepared without the pore-forming agent under the same conditions, the grinding efficiency of the ceramic grinding wheel prepared with the pore-forming agent is increased by 75%, the grinding ratio is 1.8 times of that of the ceramic grinding wheel prepared without the pore-forming agent, the frequency of dressing is increased from dressing once after grinding 50 workpieces to dressing once after grinding 80 workpieces, and the service life of the grinding wheel is also increased by 1.7 times of that of the ceramic grinding wheel prepared without the pore-forming agent. The ceramic grinding wheel with the pore-forming agent has no blockage on the surface after grinding, and the workpiece after grinding meets the grinding use requirement, while the ceramic grinding wheel without the pore-forming agent has low grinding efficiency, frequent dressing of the grinding wheel, low service life of the grinding wheel, and the surface of the grinding wheel after grinding has grinding chips, the alloy plate has a burn phenomenon, and thus cannot meet the grinding use requirement.

[0093] The above merely describes the preferred embodiments of the present application, and is not intended to limit the present application, and the patent protection scope of the present application is subject to the claims, and any equivalent structural changes made according to the content of the specification and drawings of the present application shall also be included in the protection scope of the present application.

Claims

1. A pore-forming agent for a vitrified bonded abrasive product, characterized in that: It is composed of the following components by mass fraction: C 14 ~C 18 Straight chain alkyl alcohol 40%-50%, calcium oxide 10%-20%, C 17 ~C 27 Straight-chain alkanes 35%-45%, water glass 2%-5%.

2. The pore-forming agent for vitrified bonded abrasive products according to claim 1, wherein: The invention is composed of the following components in mass fractions: 40%-50% of hexadecanol, 10%-20% of calcium oxide, 35%-45% of docosane and 2%-5% of water glass.

3. The pore-forming agent for vitrified bonded abrasive products according to claim 1 or 2, characterized in that: The particle size of the calcium oxide is no more than 100 meshes.

4. The pore-forming agent for vitrified bonded abrasive products according to claim 3, wherein: The particle size of the pore-forming agent is 12-30 meshes.

5. A method for preparing a pore-forming agent for a vitrified bonded abrasive product according to any one of claims 1 to 4, characterized in that: C 14 ~C 18 Straight chain alkyl alcohol, C 17 ~C 27 Heat the straight-chain alkane, calcium oxide and water glass to 50-70°C, mix them evenly, and cool them to granulate.

6. Use of the pore-forming agent for vitrified bonded abrasive products according to any one of claims 1 to 4 in the preparation of vitrified bonded abrasive products.

7. Use of the pore-forming agent for vitrified bonded abrasive products according to claim 6 in the preparation of vitrified bonded abrasive products, characterized in that: The density of the mixture used to prepare the vitrified bond abrasive product matches the density of the pore-forming agent used for the vitrified bond abrasive product.

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