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A metal wear-resistant pipeline with internal anti-corrosion coating

A technology of wear-resistant pipelines and anti-corrosion coatings, applied in the field of pipelines, can solve the problems of anti-corrosion coatings that are difficult to balance water resistance and anti-fouling effects, and achieve the effects of shortening the heat treatment cycle, low friction coefficient and high hardness

Inactive Publication Date: 2015-09-09
ZHEJIANG HEYUAN DECORATION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] However, anti-corrosion coatings in the prior art are usually difficult to balance water resistance, anti-fouling effect, and high temperature resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] A) Preparation of wear-resistant pipe body

[0057] 1) To obtain materials, select raw materials with the following chemical composition weight percentages:

[0058] C: 1.6%, V: 4.5%,

[0059] W: 9.1%, Mo: 7.6%,

[0060] Cr: 3.8%, RE: 0.15%,

[0061] Mn: 0.7%, Si: 0.05%,

[0062] B: 0.02%, Al: 0.2%,

[0063] Nb: 0.08%, Ni: 0.1%,

[0064] The balance is Fe and trace unavoidable impurities;

[0065] 2) Mix and heat ordinary steel scrap, micro-carbon ferrochrome, ferroniobium, ferronickel, ferrotungsten, ferromolybdenum, ferrochrome and ferromanganese, add carbon with pig iron or graphite, mix and heat to melt into molten steel, and add the molten steel after it is melted Ferrosilicon for pre-deoxidation;

[0066] 3) According to the distribution ratio of raw materials, adjust the composition in front of the furnace and raise the temperature to 1580°C, then add aluminum blocks for final deoxidation, and then leave the furnace;

[0067] 4) Place the rare earth ferro...

Embodiment 2

[0088] A) Preparation of wear-resistant pipe body

[0089] 1) To obtain materials, select raw materials with the following chemical composition weight percentages:

[0090] C: 2.7%, V: 6.0%,

[0091] W: 6.9%, Mo: 5.3%,

[0092] Cr: 5.4%, RE: 0.23%,

[0093] Mn: 0.6%, Si: 0.08%,

[0094] B: 0.01%, Al: 0.5%,

[0095] Nb: 1.1%, Ni: 0.2%,

[0096] The balance is Fe and trace unavoidable impurities;

[0097] 2) Mix and heat ordinary steel scrap, micro-carbon ferrochrome, ferroniobium, ferronickel, ferrotungsten, ferromolybdenum, ferrochrome and ferromanganese, add carbon with pig iron or graphite, mix and heat to melt into molten steel, and add the molten steel after it is melted Ferrosilicon for pre-deoxidation;

[0098] 3) According to the distribution ratio of raw materials, adjust the composition in front of the furnace and raise the temperature to 1600°C, then add aluminum blocks for final deoxidation, and then leave the furnace;

[0099] 4) Place the rare earth ferros...

Embodiment 3

[0120] A) Preparation of wear-resistant pipe body

[0121] 1) To obtain materials, select raw materials with the following chemical composition weight percentages:

[0122] C: 3.7%, V: 8.5%,

[0123] W: 3.2%, Mo: 2.4%,

[0124] Cr: 8.9%, RE: 0.4%,

[0125] Mn: 0.3%, Si: 1.0%,

[0126] B: 0.01%, Al: 0.8%,

[0127] Nb: 2.4%, Ni: 0.3%,

[0128] The balance is Fe and trace unavoidable impurities;

[0129] 2) Mix and heat ordinary steel scrap, micro-carbon ferrochrome, ferroniobium, ferronickel, ferrotungsten, ferromolybdenum, ferrochrome and ferromanganese, add carbon with pig iron or graphite, mix and heat to melt into molten steel, and add the molten steel after it is melted Ferrosilicon for pre-deoxidation;

[0130] 3) According to the distribution ratio of raw materials, adjust the composition in front of the furnace and raise the temperature to 1630°C, then add aluminum blocks for final deoxidation, and then leave the furnace;

[0131] 4) Put the rare earth ferrosilic...

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Abstract

The invention relates to a wear-resistant metal pipeline with an inner corrosion-resistant coating. The metal pipeline is manufactured by manufacturing a wear-resistant pipeline body through centrifugal casting, carrying out the processes of quenching, high-temperature tempering, solid solution strengthening thermal treatment and double tempering and dispersion hardening thermal treatment, and finally air-spraying a corrosion-resistant coating on the inner wall of the pipeline. The metal pipeline has higher hardness and wear resistance, and the corrosion-resistant coating of the metal pipeline has excellent water resistance, antifouling effect and high temperature resistance.

Description

technical field [0001] The invention relates to a pipeline, in particular to a metal wear-resistant pipeline with an internal anti-corrosion coating. Background technique [0002] There are three main forms of material failure: fracture, corrosion, and wear. Although unlike the other two forms, material wear rarely causes catastrophic damage to metal workpieces, but the economic losses it causes are quite staggering. According to statistics, about 75%-80% of the failed mechanical parts are caused by metal wear. About 30%-50% of the energy supplied to the machine is consumed in the process of friction and wear. Parts wear out After that, it will not only affect the use efficiency of machinery and equipment, but also consume a lot of manpower and material resources to replace parts and repair equipment. The economic losses caused by wear and tear are about 120 billion US dollars per year in the United States and about 50 billion marks per year in Germany. According to 2005 A...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/48C22C38/56C21D9/14C21D1/25C21D1/34C09D181/06C09D127/18C09D127/12C09D7/12C09D5/08
Inventor 叶海平
Owner ZHEJIANG HEYUAN DECORATION CO LTD
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