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Fabrication method of anti-corrosive and wear-resistant pipeline for delivering minerals

An anti-corrosion and wear-resistant, wear-resistant pipeline technology, applied in pipeline protection, pipeline damage/wear prevention, pipeline anti-corrosion/anti-rust protection and other directions, can solve problems such as incompatibility, achieve improved work efficiency, high hardness, organic solvent resistance powerful effect

Active Publication Date: 2015-05-27
JIANGSU JINSHENGYUAN SPECIAL VALVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing commonly used anti-corrosion coatings include: epoxy resin coatings, polyurethane coatings, phosphorus flake resin coatings, inorganic zinc-rich coatings, etc., but because these anti-corrosion coatings usually use organic polymers as substrates, they are not suitable for high temperature or high corrosion environments. used in

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] A) Preparation of wear-resistant pipe body

[0067] 1) To obtain materials, select raw materials with the following chemical composition weight percentages:

[0068] C: 1.6%, V: 4.5%,

[0069] W: 9.1%, Mo: 7.6%,

[0070] Cr: 3.8%, RE: 0.15%,

[0071] Mn: 0.7%, Si: 0.05%,

[0072] B: 0.02%, Al: 0.2%,

[0073] Nb: 0.08%, Ni: 0.1%,

[0074] The balance is Fe and trace unavoidable impurities;

[0075] 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;

[0076] 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;

[0077] 4) Put the rare earth ferrosi...

Embodiment 2

[0105] A) Preparation of wear-resistant pipe body

[0106] 1) To obtain materials, select raw materials with the following chemical composition weight percentages:

[0107] C: 2.7%, V: 6.0%,

[0108] W: 6.9%, Mo: 5.3%,

[0109] Cr: 5.4%, RE: 0.23%,

[0110] Mn: 0.6%, Si: 0.08%,

[0111] B: 0.01%, Al: 0.5%,

[0112] Nb: 1.1%, Ni: 0.2%,

[0113] The balance is Fe and trace unavoidable impurities;

[0114] 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;

[0115] 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;

[0116] 4) Put the rare earth ferrosil...

Embodiment 3

[0144] A) Preparation of wear-resistant pipe body

[0145] 1) To obtain materials, select raw materials with the following chemical composition weight percentages:

[0146]C: 3.7%, V: 8.5%,

[0147] W: 3.2%, Mo: 2.4%,

[0148] Cr: 8.9%, RE: 0.4%,

[0149] Mn: 0.3%, Si: 1.0%,

[0150] B: 0.01%, Al: 0.8%,

[0151] Nb: 2.4%, Ni: 0.3%,

[0152] The balance is Fe and trace unavoidable impurities;

[0153] 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;

[0154] 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;

[0155] 4) Put the rare earth ferrosilico...

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Abstract

The invention relates to a fabrication method of an anti-corrosive and wear-resistant pipeline for delivering minerals. The method comprises the steps that a wear-resistant pipeline body is fabricated by centrifugal casting; quenching, high temperature tempering, solid solution strengthening heat treatment and a double tempering dispersion hardening heat treatment technology are performed; an outer wall of the pipeline is coated with a water glass nano composite coating subjected to test configuration; high temperature solidifying and then cooling are performed; a high-temperature-resistant, oxidized and anti-corrosive filming inner layer is obtained; and finally an inner wall of the pipeline is coated with a wear-resistant coating. The fabricated metal pipeline has higher hardness and wear-resistant property; the anti-corrosive outer coating of the pipeline has excellent water resistance, anti-fouling effect and high-temperature-resistant property; and the anti-corrosive inner coating of the pipeline has excellent wear-resistant property.

Description

technical field [0001] The invention relates to a preparation method of a pipeline, in particular to a preparation method of a corrosion-resistant and wear-resistant pipeline for conveying minerals. 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 billio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C37/10C22C38/56C22C38/54C21D1/18F16L57/06F16L58/04
CPCY02P10/20
Inventor 毛春龙毛金根陈善俊朱义才
Owner JIANGSU JINSHENGYUAN SPECIAL VALVE
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