An anti-corrosion and wear-resistant pipeline for transporting minerals

A technology for anti-corrosion, wear-resistant and wear-resistant pipelines, which is applied in pipeline protection, pipeline damage/wear prevention, pipeline anticorrosion/rust protection, etc. High-temperature oxidation resistance and friction resistance, improved bonding strength, and strong organic solvent resistance

Active Publication Date: 2015-07-29
NANTONG LIYUANHENG MACHINERY
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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

[0070] A) Preparation of wear-resistant pipe body

[0071] 1) To obtain materials, select raw materials with the following chemical composition weight percentages:

[0072] C: 1.6%, V: 4.5%,

[0073] W: 9.1%, Mo: 7.6%,

[0074] Cr: 3.8%, RE: 0.15%,

[0075] Mn: 0.7%, Si: 0.05%,

[0076] B: 0.02%, Al: 0.2%,

[0077] Nb: 0.08%, Ni: 0.1%,

[0078] The balance is Fe and trace unavoidable impurities;

[0079] 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;

[0080] 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;

[0081] 4) Put the rare earth ferrosi...

Embodiment 2

[0109] A) Preparation of wear-resistant pipe body

[0110] 1) To obtain materials, select raw materials with the following chemical composition weight percentages:

[0111] C: 2.7%, V: 6.0%,

[0112] W: 6.9%, Mo: 5.3%,

[0113] Cr: 5.4%, RE: 0.23%,

[0114] Mn: 0.6%, Si: 0.08%,

[0115] B: 0.01%, Al: 0.5%,

[0116] Nb: 1.1%, Ni: 0.2%,

[0117] The balance is Fe and trace unavoidable impurities;

[0118] 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;

[0119] 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;

[0120] 4) Put the rare earth ferrosil...

Embodiment 3

[0148] A) Preparation of wear-resistant pipe body

[0149] 1) To obtain materials, select raw materials with the following chemical composition weight percentages:

[0150] C: 3.7%, V: 8.5%,

[0151] W: 3.2%, Mo: 2.4%,

[0152] Cr: 8.9%, RE: 0.4%,

[0153] Mn: 0.3%, Si: 1.0%,

[0154] B: 0.01%, Al: 0.8%,

[0155] Nb: 2.4%, Ni: 0.3%,

[0156] The balance is Fe and trace unavoidable impurities;

[0157] 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;

[0158] 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;

[0159] 4) Put the rare earth ferrosilicon...

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Abstract

The invention relates to an anti-corrosive and wear-resistant pipeline for delivering minerals. 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 pipeline, in particular to 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 billion marks per year in Germany. According to 2005 ...

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
Inventor 丁庆平
Owner NANTONG LIYUANHENG MACHINERY
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