Preparation process of self-propagating nano-ceramic composite steel pipe

A technology of nano-ceramic and composite steel pipes, which is applied in the technical field of producing ceramic composite steel pipes, can solve problems such as stagnation and no successful reports, and achieve the effects of increasing density, increasing toughness and impact strength, and prolonging service life

Inactive Publication Date: 2011-12-14
扬州恒鑫冶金科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this direction is only in theory at present, and no successful reports have been seen in actual production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] 1. Put a ￠133mm steel pipe with a thickness of 8mm and a length of 2000mm into the centrifuge, prepare the sintering raw materials according to the ingredients of the ceramic layer with a thickness of 3.5mm; 2 o 3 , SiO 2 And mixing auxiliary material, prepare the base material that gross weight is 13.8 kilograms.

[0013] 2. Add nano-ZrO to the base material 2 and nano Al 2 o 3 , nano-ZrO 2 Addition is 4.5% of the total weight of raw materials, nano-Al 2 o 3 The addition amount is 1.5% of the total weight of raw materials.

[0014] 3. Ignite with air supply to make the mixed raw materials fully burn, self-propagating casting, and evenly combine with the transition layer and the inner wall of the steel pipe to form a ceramic composite layer. At the same time, when igniting, the oxygen supply lasts for 3 minutes.

Embodiment 2

[0016] .Put a ￠159mm steel pipe with a thickness of 10mm and a length of 2000mm into the centrifuge, prepare the sintering raw materials according to the ingredients of the ceramic layer with a thickness of 3.5mm; 2 o 3 , SiO 2 And mixing auxiliary material, prepare the base material that total weight is 16.6 kilograms.

[0017] 2. Add nano-ZrO to the base material 2 and nano Al 2 o 3 , nano-ZrO 2 The amount added is 5% of the total weight of raw materials, nano-Al 2 o 3 Addition is 2.4% of the total weight of raw materials.

[0018] 3. Ignition with air supply to make the mixed raw materials fully burn, self-propagating casting, and evenly combine with the transition layer and the inner wall of the steel pipe to form a ceramic composite layer. At the same time, the oxygen supply device lasts for 4 minutes when igniting.

Embodiment 3

[0020] Put a ￠273mm steel pipe with a thickness of 12mm and a length of 2000mm into the centrifuge, prepare the sintering raw materials according to the ingredients of the ceramic layer with a thickness of 3.5mm; 2 o 3 , SiO 2 And mixing auxiliary materials, the preparation total weight is the basic material of 30 kilograms.

[0021] 2. Add nano-ZrO to the base material 2 and nano Al 2 o 3 , nano-ZrO 2 Addition is 4.8% of the total weight of raw materials, nano-Al 2 o 3 The addition amount is 2% of the total weight of raw materials.

[0022] 3. Gas supply and ignition, so that the mixed raw materials are fully combusted, self-propagating casting, and evenly combined with the transition layer and the inner wall of the steel pipe to form a ceramic composite layer. At the same time, when igniting the oxygen supply, the oxygen supply lasts for 5 minutes.

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PUM

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Abstract

The invention relates to a process for producing ceramic composite steel pipes. Including configuration of sintering raw materials, installation, ignition, reaction and other processes, the sintering raw materials include Al, Fe2O3, SiO2, the sintering raw materials also include nano-ZrO2 and nano-Al2O3, the addition of nano-ZrO2 is 4.5-5% of the total weight of raw materials , the addition of nanometer Al2O3 is 1.5-2.4% of the total weight of raw materials. The invention adds 4.5-5% nanometer ZrO2 and 1.5-2.4% nanometer Al2O3 to raw materials (Al, Fe2O3, SiO2). By adding nano-materials, the structure of the material is changed, the structure of the reaction is strengthened, the density is increased, the toughness and impact strength of the ceramic layer are increased, and the service life of the pipeline is extended. The invention solves the defects of high brittleness and poor impact strength of the ceramic layer.

Description

technical field [0001] The invention relates to a process for producing ceramic composite steel pipes, in particular to the improvement of a process for preparing ceramic composite steel pipes by self-propagating high-temperature synthesis technology. Background technique [0002] Self-propagating high-temperature synthesis technology is a process for producing ceramic composite steel pipes. The existing technology is to put a certain amount of mixed raw materials in the steel pipe, and use Al and Fe to 2 o 3 or Fe 3 o 4 Thermite centrifugal reaction, in the high-speed rotating state of the steel pipe, after ignition, the mixed raw materials rely on exothermic reaction to sinter at high temperature to form a ceramic layer that is tightly attached to the inner wall of the steel pipe. [0003] However, the ceramic layer on the inner wall of the steel pipe prepared according to the above process has high brittleness and poor impact resistance. In order to solve the above p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F5/12B22F3/23
Inventor 曹振顺乐玉飞
Owner 扬州恒鑫冶金科技有限公司
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