Preparation method for wear resistant metal pipeline with internal anticorrosive coating

A wear-resistant pipeline and anti-corrosion coating technology, which is applied in pipeline protection, pipeline damage/wear prevention, pipeline anti-corrosion/anti-rust protection, etc. The effect of heat treatment cycle, reducing segregation, and uniform distribution of carbide structure

Inactive Publication Date: 2015-05-20
江苏中纤管道设备有限公司
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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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] A) Preparation of wear-resistant pipe body

[0054] 1) To obtain materials, select raw materials with the following chemical composition weight percentages:

[0055] C: 1.6%, V: 4.5%,

[0056] W: 9.1%, Mo: 7.6%,

[0057] Cr: 3.8%, RE: 0.15%,

[0058] Mn: 0.7%, Si: 0.05%,

[0059] B: 0.02%, Al: 0.2%,

[0060] Nb: 0.08%, Ni: 0.1%,

[0061] The balance is Fe and trace unavoidable impurities;

[0062] 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;

[0063] 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;

[0064] 4) Put the rare earth ferrosi...

Embodiment 2

[0085] A) Preparation of wear-resistant pipe body

[0086] 1) To obtain materials, select raw materials with the following chemical composition weight percentages:

[0087] C: 2.7%, V: 6.0%,

[0088] W: 6.9%, Mo: 5.3%,

[0089] Cr: 5.4%, RE: 0.23%,

[0090] Mn: 0.6%, Si: 0.08%,

[0091] B: 0.01%, Al: 0.5%,

[0092] Nb: 1.1%, Ni: 0.2%,

[0093] The balance is Fe and trace unavoidable impurities;

[0094] 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;

[0095] 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;

[0096] 4) Place the rare earth ferros...

Embodiment 3

[0117] A) Preparation of wear-resistant pipe body

[0118] 1) To obtain materials, select raw materials with the following chemical composition weight percentages:

[0119] C: 3.7%, V: 8.5%,

[0120] W: 3.2%, Mo: 2.4%,

[0121] Cr: 8.9%, RE: 0.4%,

[0122] Mn: 0.3%, Si: 1.0%,

[0123] B: 0.01%, Al: 0.8%,

[0124] Nb: 2.4%, Ni: 0.3%,

[0125] The balance is Fe and trace unavoidable impurities;

[0126] 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;

[0127] 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;

[0128] 4) Put the rare earth ferrosilic...

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Abstract

The invention relates to a preparation method for a wear resistant metal pipeline with an internal anticorrosive coating. The preparation method comprises the following steps: obtaining a wear resistant pipeline body through centrifugal casting; allowing the wear resistant pipeline body to be subjected to quenching, high temperature tempering, solution strengthening heat treating, and two-time tempering and dispersion hardening heat processing; and finally spraying the anticorrosive coating on an internal wall of the pipeline through air. According to the preparation method, the metal pipeline has higher hardness and wear-resisting property; and the anticorrosive coating has excellent waterproof and antifouling effect, and high temperature resisting property.

Description

technical field [0001] The invention relates to a method for preparing a pipeline, in particular to a method for preparing 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 m...

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 张康
Owner 江苏中纤管道设备有限公司
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