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Resin ceramic wear-resistant composite material and preparation method thereof

A technology of composite materials and ceramics, which is applied in the field of epoxy resin ceramic wear-resistant and corrosion-resistant composite materials and its preparation, can solve the problems of filling mold defects, poor fluidity, and easy cracking, etc., and achieve the solution of pot life and curing temperature. Requirements, improve dimensional stability, increase the effect of impact toughness

Inactive Publication Date: 2021-06-04
洛阳嘉斯诺泵业制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, resin casting systems with high ceramic particle content often have problems such as poor fluidity, defects in the filling mold, and a large number of bubbles in the molded part after curing.
For large castings, the pot life and curing conditions of the resin system are the key factors for the success of the casting process. Due to the short pot life of the commonly used curing pouring system, the gel is often solidified before the pouring is completed, and sometimes the heat is released due to the reaction. pouring failure
In addition, there are large internal stresses in the molding process of large castings, which are prone to cracking during molding and use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Prepare the resin-ceramic wear-resistant composite material according to the following steps:

[0038](1) Preparation of blocked polyurethane prepolymer: put polyoxypropylene diol in a reaction kettle, dry it under vacuum at 100-110°C for 1 hour, fill it with nitrogen protection and lower the temperature to 55°C-60°C, then add diphenylmethane di Isocyanate (MDI), heated to 75-80°C for 3 hours under the protection of nitrogen, and finally added cardanol, heated to 85-90°C for 3 hours to obtain blocked polyurethane prepolymer (BP-1); among them, polyoxypropylene glycol , the mass ratio of diphenylmethane diisocyanate (MDI) to cardanol is: 100:25:35;

[0039] (2) Ceramic filler pretreatment: premix 250 parts of silicon carbide F14, 150 parts of silicon carbide F30, 70 parts of brown corundum F500 and 186 parts of brown corundum F1200 in a three-dimensional mixer according to the mass parts, and the premixing time is 60 minutes , and then dried at 100-120°C for 12h;

[00...

Embodiment 2

[0059] Prepare the resin-ceramic wear-resistant composite material according to the following steps:

[0060] (1) Preparation of blocked polyurethane prepolymer: Put polytetrahydrofuran diol in a reaction kettle, dry it in vacuum at 100-110°C for 1 hour, fill it with nitrogen protection and cool down to 55°C-60°C, then add isophorone di Isocyanate (IPDI), heated to 75-80°C for 3 hours under the protection of nitrogen, and finally added cardanol, heated to 85-90°C for 3 hours to obtain a blocked polyurethane prepolymer (BP-1); among them, polytetrahydrofuran diol, The mass ratio of isophorone diisocyanate (IPDI) to cardanol is 100:23:35;

[0061] (2) Ceramic filler pretreatment: premix 200 parts of silicon carbide F14, 150 parts of silicon carbide F30, 63 parts of brown corundum F500 and 120 parts of brown corundum F1200 in a three-dimensional mixer according to the mass parts, and the premixing time is 60 minutes , and then dried at 100-120°C for 12h;

[0062] (3) Preparatio...

Embodiment 3

[0081] Prepare the resin-ceramic wear-resistant composite material according to the following steps:

[0082] (1) Preparation of blocked polyurethane prepolymer: Put polytetrahydrofuran diol in a reaction kettle, dry it in vacuum at 100-110°C for 2 hours, fill it with nitrogen protection and lower the temperature to 55°C-60°C, then add dicyclohexylmethane di Isocyanate (H 12 MDI), heated to 75-80°C for 4 hours under the protection of nitrogen, and finally added cardanol, heated to 85-90°C for 4 hours to obtain a blocked polyurethane prepolymer; among them, polytetrahydrofuran diol, dicyclohexylmethane diisocyanate ( h 12 The mass ratio of MDI) and cardanol is 100:27:35;

[0083] (2) Ceramic filler pretreatment: 340 parts of silicon carbide F14, 180 parts of silicon carbide F30, 68 parts of brown corundum F500 and 110 parts of brown corundum F1200 were pre-mixed in a three-dimensional mixer according to the mass parts, and the pre-mixing time was 50 minutes , and then dried ...

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Abstract

The invention provides a resin ceramic wear-resistant composite material and a preparation method thereof. The method comprises the steps: firstly, respectively preparing a polyurethane prepolymer, an epoxy resin component and a curing agent component; then premixing silicon carbide and brown fused alumina filler, and then mixing with a polyurethane prepolymer, an epoxy resin component, a curing agent component, a silane coupling agent, a dispersing agent and a defoaming agent to obtain a castable of the composite material; and finally, injecting the castable into a mold, curing and molding, and demolding to obtain the resin ceramic wear-resistant composite material. The mass fraction of the composite material ceramic filler prepared by the method can reach 87%, the composite material is firmly combined with an embedded part, cracks caused by stress are avoided, the composite material is particularly suitable for manufacturing flow passage components of large transmission equipment, and the prepared wear-resistant composite material flow passage component has the service life in the same working condition environment up to 8 times or more of that of a traditional high-chromium alloy material flow passage component.

Description

technical field [0001] The invention relates to a resin ceramic composite material, in particular to an epoxy resin ceramic wear-resistant and corrosion-resistant composite material and a preparation method thereof. Background technique [0002] Various medium transmission equipment are widely used in mining, thermal power, chemical and water conservancy projects and other fields. Most of the media transmitted by the equipment are a mixture of liquid and solid. These media contain a large number of hard solid particles, and the media often contain various acids and alkaline substances. Therefore, the flow-passing parts of the medium transmission equipment will not only be subject to strong wear but also strong corrosion during use, and the mixed medium will produce strong cavitation when moving at high pressure. Therefore, the flow-passing parts of the medium transmission equipment are required to have the characteristics of wear resistance, acid and alkali corrosion resist...

Claims

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Application Information

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IPC IPC(8): C04B26/32C08G18/48C08G18/30C04B111/20
CPCC04B26/32C08G18/4825C08G18/4854C08G18/2825C04B2111/2038C04B2201/20C04B2201/50
Inventor 王自新蒋纪伦蒋静杰张朝选
Owner 洛阳嘉斯诺泵业制造有限公司
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