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Preparation method of wear-resistant cast pipe with high-temperature oxidation resistant corrosion-resistant layer

A technology of anti-oxidation at high temperature and anti-corrosion layer, applied in anti-corrosion coatings, coatings, manufacturing tools, etc., can solve problems such as incompatibility, and achieve the effect of improving work efficiency, high hardness, and strong organic solvent resistance

Active Publication Date: 2013-09-11
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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  • Preparation method of wear-resistant cast pipe with high-temperature oxidation resistant corrosion-resistant 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, ferro-niobium, ferronickel, ferro-tungsten, ferro-molybdenum, ferro-chromium, ferro-niobium, ferronickel and ferromanganese, add carbon with pig iron or graphite, mix and heat to melt into molten steel After the molten steel is melted, ferrosilicon is added 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;

[007...

Embodiment 2

[0098] A) Preparation of wear-resistant pipe body

[0099] 1) To obtain materials, select raw materials with the following chemical composition weight percentages:

[0100] C: 2.7%, V: 6.0%,

[0101] W: 6.9%, Mo: 5.3%,

[0102] Cr: 5.4%, RE: 0.23%,

[0103] Mn: 0.6%, Si: 0.08%,

[0104] B: 0.01%, Al: 0.5%,

[0105] Nb: 1.1%, Ni: 0.2%,

[0106] The balance is Fe and trace unavoidable impurities;

[0107] 2) Mix and heat ordinary steel scrap, micro-carbon ferrochromium, ferroniobium, ferronickel, ferrotungsten, ferromolybdenum, ferrochromium, ferroniobium, ferronickel and ferromanganese, add carbon with pig iron or graphite, mix and heat and melt into molten steel After the molten steel is melted, ferrosilicon is added for pre-deoxidation;

[0108] 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;

[0109] ...

Embodiment 3

[0134] A) Preparation of wear-resistant pipe body

[0135] 1) To obtain materials, select raw materials with the following chemical composition weight percentages:

[0136] C: 3.7%, V: 8.5%,

[0137] W: 3.2%, Mo: 2.4%,

[0138] Cr: 8.9%, RE: 0.4%,

[0139] Mn: 0.3%, Si: 1.0%,

[0140] B: 0.01%, Al: 0.8%,

[0141] Nb: 2.4%, Ni: 0.3%,

[0142] The balance is Fe and trace unavoidable impurities;

[0143] 2) Mix and heat ordinary steel scrap, micro-carbon ferrochromium, ferroniobium, ferronickel, ferrotungsten, ferromolybdenum, ferrochromium, ferroniobium, ferronickel and ferromanganese, add carbon with pig iron or graphite, mix and heat and melt into molten steel After the molten steel is melted, ferrosilicon is added for pre-deoxidation;

[0144] 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;

[0145] 4)...

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Abstract

The invention relates to a preparation method of a wear-resistant cast pipe with a high-temperature oxidation resistant corrosion-resistant layer. The preparation method is characterized 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, then electrostatically spraying a rust-resistant coating on the outer wall of the pipeline, finally coating a water glass nano-composite coating prepared through tests on the inner wall of the pipeline, and carrying out cooling after high-temperature curing, thus obtaining a high-temperature oxidation resistant corrosion-resistant film-coated inner layer. The prepared 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 present invention involves a method of preparation of a pipeline, especially a preparation method with wear -resistant casting tube with anti -high temperature oxidation and anticorrosive layers. Background technique [0002] There are three main forms of material destruction: break, corrosion and wear.Although the material wear is not like two other forms, it rarely causes catastrophic harm of metal workpieces, but its economic losses are quite amazing.According to statistics, about 75 %"-80 % of the failure mechanical parts are caused by metal wear.About 30 % -50 % of the energy supply machines are consumed during friction and wear.After the loss of parts, it not only affects the effectiveness of the use of the machine and equipment, but also needs to consume a lot of manpower, material resources to replace accessories and maintenance equipment.The economic losses caused by wear are about $ 120 billion per year, and Germany is about 50 billion yuan / ye...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/56C22C38/54C21D9/14C21D1/18C21D1/25C09D183/04C09D7/12C09D5/08
CPCY02P10/20
Inventor 严建山
Owner JIANGSU JINSHENGYUAN SPECIAL VALVE
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