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A wear-resistant cast pipe with a high-temperature oxidation-resistant anti-corrosion layer

A technology of anti-oxidation and anti-corrosion layer at high temperature, applied in anti-corrosion coatings, coatings, pipes, etc., can solve the problem that anti-corrosion coatings are difficult to take into account water resistance, anti-fouling effect, etc., and achieve excellent anti-oxidation resistance and friction resistance. The effect of good surface quality and shortened heat treatment cycle

Active Publication Date: 2015-10-28
江阴德耐特重工科技有限公司
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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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  • A wear-resistant cast pipe with a high-temperature oxidation-resistant anti-corrosion layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] A) Preparation of wear-resistant pipe body

[0063] 1) To obtain materials, select raw materials with the following chemical composition weight percentages:

[0064] C: 1.6%, V: 4.5%,

[0065] W: 9.1%, Mo: 7.6%,

[0066] Cr: 3.8%, RE: 0.15%,

[0067] Mn: 0.7%, Si: 0.05%,

[0068] B: 0.02%, Al: 0.2%,

[0069] Nb: 0.08%, Ni: 0.1%,

[0070] The balance is Fe and trace unavoidable impurities;

[0071] 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;

[0072] 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;

[0073] 4) Put the rare earth ferrosi...

Embodiment 2

[0097] A) Preparation of wear-resistant pipe body

[0098] 1) To obtain materials, select raw materials with the following chemical composition weight percentages:

[0099] C: 2.7%, V: 6.0%,

[0100] W: 6.9%, Mo: 5.3%,

[0101] Cr: 5.4%, RE: 0.23%,

[0102] Mn: 0.6%, Si: 0.08%,

[0103] B: 0.01%, Al: 0.5%,

[0104] Nb: 1.1%, Ni: 0.2%,

[0105] The balance is Fe and trace unavoidable impurities;

[0106] 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;

[0107] 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;

[0108] 4) Put the rare earth ferrosil...

Embodiment 3

[0132] A) Preparation of wear-resistant pipe body

[0133] 1) To obtain materials, select raw materials with the following chemical composition weight percentages:

[0134] C: 3.7%, V: 8.5%,

[0135] W: 3.2%, Mo: 2.4%,

[0136] Cr: 8.9%, RE: 0.4%,

[0137] Mn: 0.3%, Si: 1.0%,

[0138] B: 0.01%, Al: 0.8%,

[0139] Nb: 2.4%, Ni: 0.3%,

[0140] The balance is Fe and trace unavoidable impurities;

[0141] 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;

[0142] 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;

[0143] 4) Put the rare earth ferrosilic...

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Abstract

The invention relates to an abrasion resistant cast tube with a high temperature oxidation resistant anticorrosive coating. An abrasion resistant cast tube body is produced through centrifugal casting and is subjected to quenching, high-temperature tempering, solution strengthening thermal treatment and twice tempering dispersion hardening thermal treatment, then a rustproof coating is coated on the outer wall of the tube through electrostatic spraying, finally a water glass nanometer composite coating prepared through testing is sprayed on the inner wall of the tube, and a high temperature oxidation resistant anticorrosive coating film inner layer is obtained after high temperature curing and cooling. The obtained metal tube has high hardness and abrasion resistance, and the anticorrosive coating of the metal tube has excellent waterproof performance, antifouling effect and high temperature resistance.

Description

technical field [0001] The invention relates to a pipe, in particular to a wear-resistant cast pipe with a high-temperature oxidation-resistant anti-corrosion layer. 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. Acco...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L58/10F16L9/02C22C38/56C22C38/54C09D5/08C09D1/00
Inventor 严建山
Owner 江阴德耐特重工科技有限公司
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