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CN-121989173-A - Ceramic resin composite grinding wheel and preparation method and application thereof

CN121989173ACN 121989173 ACN121989173 ACN 121989173ACN-121989173-A

Abstract

The invention discloses a ceramic resin composite grinding wheel and a preparation method and application thereof, and belongs to the technical field of grinding tools, wherein the composite grinding wheel comprises, by weight, 800 parts of grinding materials, 140-160 parts of auxiliary materials, 8-10 parts of closed isocyanate-based silane coupling agents, 3-5 parts of hollow ceramic fiber-loaded calcium oxide and 110-128 parts of phenolic resin powder, wherein the hollow ceramic fiber-loaded calcium oxide is prepared by taking hollow ceramic fibers as a carrier and calcium nitrate as a calcium source through a dip drying method coupling pyrolysis method.

Inventors

  • ZHU BINGQING
  • ZHU GUOQIAO
  • XU JUN

Assignees

  • 黄山安卡研磨新材料有限公司

Dates

Publication Date
20260508
Application Date
20260204

Claims (10)

  1. 1. The ceramic resin composite grinding wheel is characterized by comprising the following raw materials in parts by weight: 800 parts of abrasive, 140-160 parts of auxiliary materials, 8-10 parts of closed isocyanate-based silane coupling agent, 3-5 parts of hollow ceramic fiber supported calcium oxide and 110-128 parts of phenolic resin powder; The hollow ceramic fiber loaded calcium oxide is prepared by taking hollow ceramic fibers as a carrier and calcium nitrate as a calcium source through a coupling pyrolysis method by a dipping drying method.
  2. 2. The ceramic resin composite grinding wheel according to claim 1, wherein the hollow ceramic fiber is obtained by impregnating a precursor solution with natural hollow plant fibers as a template, drying and calcining.
  3. 3. The ceramic resin composite grinding wheel according to claim 2, wherein the precursor solution is formed by mixing zirconium oxychloride octahydrate, aluminum chloride hexahydrate, yttrium nitrate hexahydrate and ethanol solution, wherein the mass fraction of the zirconium oxychloride octahydrate in the precursor solution is 10-15%, the aluminum chloride hexahydrate is 14-16% of the molar quantity of the zirconium oxychloride octahydrate, the yttrium nitrate hexahydrate is 4-6% of the molar quantity of the zirconium oxychloride octahydrate, and the volume fraction of the absolute ethanol is 40-60%.
  4. 4. The ceramic resin composite grinding wheel according to claim 1, wherein the preparation raw materials of the blocked isocyanate-based silane coupling agent comprise an isocyanate-based silane coupling agent and a blocking agent, and the molar ratio of the isocyanate-based silane coupling agent to the blocking agent is 1:1.1-1.2.
  5. 5. The ceramic resin composite grinding wheel according to claim 4, wherein said isocyanatosilane coupling agent is at least one of 3-isocyanatopropyl trimethoxysilane, 3-isocyanatopropyl methyldiethoxysilane, methyl- (3-isocyanatopropyl) dimethylsilane and isocyanatopropyl triethoxysilane.
  6. 6. The ceramic resin composite grinding wheel according to claim 4, wherein said blocking agent is at least one of methyl ethyl ketoxime, 2-methylimidazole and caprolactam.
  7. 7. The ceramic resin composite grinding wheel according to claim 1 or 4, wherein the preparation method of the blocked isocyanate-based silane coupling agent comprises the following steps: Under the protection of nitrogen, the isocyanate-based silane coupling agent and the sealing agent are placed in a flask, and the temperature is raised to 50-70 ℃ and the stirring reaction is carried out for 4-6 hours.
  8. 8. A method for preparing the ceramic resin composite grinding wheel, which is characterized by comprising the following steps of: s1, adding an abrasive, auxiliary materials and a closed isocyanate silane coupling agent into a stirrer, and stirring and mixing for 2-5 hours at room temperature to obtain pretreated material powder; S2, blending the pretreated material powder, the hollow ceramic fiber loaded calcium oxide and the phenolic resin powder for 10-20min to obtain final powder, pouring the final powder into a mold, carrying out hot pressing treatment, demolding, standing for 24-36h, transferring to an oven for secondary curing, and obtaining the ceramic resin composite grinding wheel after curing is finished.
  9. 9. The method for producing a ceramic resin composite grinding wheel according to claim 8, wherein the heat pressing treatment is carried out at a temperature of 180-200 ℃, a pressure of 50-80MPa, a time of 30-40min, and the secondary curing is carried out at a temperature of 180-200 ℃ for a time of 5-7h.
  10. 10. Use of a ceramic resin composite grinding wheel according to any one of claims 1 to 7 for heavy-duty grinding of steel workpieces.

Description

Ceramic resin composite grinding wheel and preparation method and application thereof Technical Field The invention belongs to the technical field of grinding tools, and particularly relates to a ceramic resin composite grinding wheel and a preparation method and application thereof. Background Heavy-load grinding wheels, also known as barren grinding wheels or billet grinding wheels, are key tools used in the steel industry for grinding steel ingots, billets and steel plates and cleaning surfaces of large castings. The working scene is harsh, extremely high grinding pressure (usually 1000-1500 kg), extremely high linear speed (more than 80m/s and pursuing 100m/s or even more) and extremely high metal grinding rate (target 800-1000 kg/h) are required, and a dry grinding mode is generally adopted. This puts very high demands on the strength, toughness, heat resistance and grinding ratio of the grinding wheel. In order to meet the requirements, the existing domestic and foreign heavy-load grinding wheels mainly adopt a combination of a resin binder and high-toughness abrasive materials (such as brown corundum, zirconia corundum, sintered corundum and the like). Resin binders, particularly phenolic resins, are the mainstay of choice due to their good process compatibility, high bond strength and inherent heat resistance. However, phenolic resin releases small molecules and shrinks during the curing process, so that the cured resin matrix has inherent defects of high brittleness, easiness in generating micro-pores and the like. Under the heavy-load and high-impact grinding working conditions, the defects can obviously reduce the holding force of the resin on the abrasive, become weak links of the whole structure of the grinding wheel, lead the abrasive to fall off prematurely, accelerate the abrasion of the grinding wheel, shorten the service life and even have potential safety hazards under high rotating speed. Although phenolic resin is modified by means of high molecular polymer toughening (such as rubber and epoxy resin modification), resin functionalization enhancement (such as optimizing molecular structure) and the like in the industry to improve toughness and strength, the improvement is basically optimized in an organic resin system and cannot be expanded to the whole grinding wheel raw material system, so that the interface binding force between the modified resin and the grinding material is insufficient, the holding force of the grinding material is weak, and meanwhile, the inherent shrinkage, small molecular release and internal micro defects (such as air holes) generated in the resin curing process are also lack of fundamental inhibition and restoration means. In a word, the resin modification path of the 'inner roll' is difficult to synchronously and cooperatively improve the rigidity, toughness, compactness and heat resistance of the grinding wheel, and limits the breakthrough of the grinding ratio and the service life of the heavy-load grinding wheel under the limit working condition. Disclosure of Invention The invention aims to provide a ceramic resin composite grinding wheel so as to solve the problem of low grinding efficiency of the existing heavy-load grinding wheel. The second object of the present invention is to provide a method for producing the ceramic resin composite grinding wheel. The invention also aims to provide an application of the ceramic resin composite grinding wheel. The aim of the invention can be achieved by the following technical scheme: in a first aspect, the application provides a ceramic resin composite grinding wheel, which comprises the following raw materials in parts by weight: 800 parts of abrasive, 140-160 parts of auxiliary materials, 8-10 parts of closed isocyanate-based silane coupling agent, 3-5 parts of hollow ceramic fiber supported calcium oxide and 110-128 parts of phenolic resin powder. The hollow ceramic fiber loaded calcium oxide is prepared by taking hollow ceramic fibers as a carrier and calcium nitrate as a calcium source through a coupling pyrolysis method by a dipping drying method. The hollow ceramic fiber is obtained by taking natural hollow plant fiber as a template, dipping a precursor solution, drying and calcining. Further, the preparation method of the hollow ceramic fiber supported calcium oxide comprises the following steps: Adding the hollow ceramic fiber into a calcium nitrate solution, stirring for 3-5 hours at the rotating speed of 500-900r/min, drying, placing the dried product into a tube furnace, and heating to 600 ℃ at the heating rate of 3-5 ℃ per min for 1-2 hours. Further, the dosage ratio of the hollow ceramic fiber to the calcium nitrate solution is 1g:8-15mL, and the mass fraction of the calcium nitrate solution is 30-50%. Further, the hollow ceramic fiber preparation raw material comprises plant fibers and precursor solution, and the dosage ratio of the plant fibers to the precursor solution is 1g:20-40mL. Further, the