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A kind of manufacturing method of self-propagating combustion ceramic composite steel pipe

A composite steel pipe and a manufacturing method, which are applied in the field of wear-resistant steel pipes, can solve the problems of low connection strength, reduced service life of self-propagating ceramic composite steel pipes, and short reaction time.

Active Publication Date: 2021-06-08
江苏鑫都管业有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the prior art, although the sintering temperature in the self-propagating combustion process is relatively high, exceeding the melting point of the steel pipe, because the self-propagating combustion reaction time is relatively short, less steel is melted on the inner surface of the steel pipe during the self-propagating combustion reaction time. The transition layer is only bonded to the inner surface of the steel pipe, resulting in a low connection strength between the ceramic layer formed by the self-propagating combustion reaction and the inner surface of the steel pipe, which reduces the service life of the self-propagating combustion ceramic composite steel pipe

Method used

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  • A kind of manufacturing method of self-propagating combustion ceramic composite steel pipe

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Effect test

Embodiment 2

[0055] The difference between this embodiment and Embodiment 1 is that in step 2) and step 3), the inner thread of the inner wall of the steel pipe is a triangular thread, the difference between the outer diameter and the inner diameter of the inner thread of the inner wall of the steel pipe is 0.2 mm, and the inner thread of the inner wall of the steel pipe The pitch of the screw is 0.6mm; in step 4), the grain size of the grinding wheel is 60 #.

[0056] In step 6), the components of the self-propagating combustion powder 1 include by weight: 500 parts by weight of iron oxide powder, 200 parts by weight of aluminum powder, 50 parts by weight of zeolite powder, 10 parts by weight of copper oxide powder, 10 parts by weight of chromium oxide powder parts by weight, carbon powder 30 parts by weight.

[0057] In step 9), the components of the self-propagating combustion powder 2 include, in parts by weight: 500 parts by weight of iron oxide powder and 200 parts by weight of alumi...

Embodiment 3

[0060] The difference between this embodiment and Embodiment 1 and Embodiment 2 is that in step 2) and step 3), the inner thread of the inner wall of the steel pipe is a triangular thread, and the difference between the outer diameter and inner diameter of the inner thread of the inner wall of the steel pipe is 0.3 mm. The pitch of the internal thread on the inner wall is 0.7mm; in step 4), the grain size of the grinding wheel is 60#.

[0061] In step 6), the components of self-propagating combustion powder 1 include by weight: 600 parts by weight of iron oxide powder, 2040 parts by weight of aluminum powder, 65 parts by weight of zeolite powder, 11 parts by weight of copper oxide powder, 12 parts by weight of chromium oxide powder parts by weight, carbon powder 39 parts by weight.

[0062] In step 9), the components of the self-propagating combustion powder 2 include, in parts by weight: 650 parts by weight of iron oxide powder and 260 parts by weight of aluminum powder.

[...

Embodiment 4

[0065] The difference between this example and Example 1, Example 2, and Example 3 is that in step 2) and step 3), the inner thread of the inner wall of the steel pipe is a triangular thread, and the difference between the outer diameter and inner diameter of the inner wall of the steel pipe is 0.3 mm, and the pitch of the internal thread on the inner wall of the steel pipe is 0.7 mm; in step 4), the grain size of the grinding wheel is 60 # .

[0066] In step 6), the components of the self-propagating combustion powder 1 include by weight: 800 parts by weight of iron oxide powder, 300 parts by weight of aluminum powder, 65 parts by weight of zeolite powder, 12 parts by weight of copper oxide powder, and 12 parts by weight of chromium oxide powder. parts by weight, carbon powder 30 parts by weight.

[0067] In step 9), the components of the self-propagating combustion powder 2 include, in parts by weight: 800 parts by weight of iron oxide powder and 300 parts by weight of alumi...

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Abstract

The present application discloses a method for manufacturing a self-propagating ceramic composite steel pipe, comprising the following steps: 1) preparing a steel pipe, the wall thickness of which is greater than that of the self-propagating ceramic composite steel pipe; 2) thread milling Mill the inner thread on the inner wall of the steel pipe; 3) Mill the inner thread on the inner wall of the steel pipe by thread milling. Grinding the inner wall of the steel pipe, grinding the surface of the thread milled in step 2) and step 3) rough; 5) Grinding the zeolite into powder by dry grinding; adding iron oxide powder, metal oxide powder, aluminum powder to the zeolite powder and Stir evenly to form a self-spreading powder. The technical solution of the application can make the transition layer in the steel pipe and the ceramic layer have better connection strength, and can improve the wear resistance of the ceramic layer, and improve the performance of the ceramic composite steel pipe.

Description

technical field [0001] The invention relates to a method for manufacturing a self-propagating ceramic composite steel pipe, which belongs to the field of wear-resistant steel pipes. Background technique [0002] Self-propagating combustion ceramic composite steel pipe is made by advanced self-propagating high-temperature centrifugal synthesis process. The pipe is composed of three layers of corundum ceramics, a transition layer and a steel body from the inside to the outside. The ceramic layer is dense corundum porcelain formed at a high temperature above 2200 degrees. The ceramic layer is combined with the inner wall of the steel pipe through the transition layer. The process adopts the method of self-propagating centrifugal casting, which mainly uses the chemical reaction of the substance itself, exothermic combustion to generate high temperature, and the technology of synthesizing new substances in the process of spreading the combustion wave. Due to the wear resistance,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00B23K23/00B23K35/34
CPCB23K23/00B23K35/34B23P15/00
Inventor 潘爱军
Owner 江苏鑫都管业有限公司
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