CN104226981A - Nano particle hardened steel with high strength - Google Patents
Nano particle hardened steel with high strength Download PDFInfo
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- CN104226981A CN104226981A CN201410435724.9A CN201410435724A CN104226981A CN 104226981 A CN104226981 A CN 104226981A CN 201410435724 A CN201410435724 A CN 201410435724A CN 104226981 A CN104226981 A CN 104226981A
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Abstract
The invention discloses nano particle hardened steel with high strength. The nano particle hardened steel comprises the following substances in parts by weight: 35-46 parts of iron powder, 11-15 parts of nano-silica dispersoid, 58-70 parts of copper, 5-12 parts of paraffin, 16-22 parts of brass powder, 5-17 parts of nodular cast iron powder, 3-4 parts of aluminum hydroxide, 11-14 parts of modified nano-scale silicon oxide, 10-12 parts of halogenate phosphate, 3-8 parts of aluminum silicate, 12-23 parts of sand, and 25-40 parts of glass fiber. The nano particle hardened steel provided by the invention is better in tenacity and uniform in texture, and the intensity and tenacity can be improved to achieve a toughness requirement.
Description
Technical field
The present invention relates to the particle reinforced steel of a kind of high-strength nano.
Background technology
In order to improve the thermal efficiency of thermal power generation, reducing CO2 discharge, greatly developing high parameter, an important trend that jumbo ultra supercritical (USC) power station has been world power industrial development.And low alloy ferritic steel, 9%-12% Cr type martensite steel and common 18/8 type austenitic steel conventional in China power station, all cannot meet the demands in elevated temperature strength or antioxygenic property, only have development both to have good high-temperature behavior, the Novel austenitic heat-resistance steel again with relatively low cost could meet the demand of ultra supercritical power station to high-temperature material.Through years of researches and exploitation, multiple austenitic heat-resistance steel has been had to be developed and to obtain application at present, wherein mainly utilize copper-rich phase and be aided with the elevated temperature strength steel of 18Cr9Ni3CuNbN (super 304H steel) the Austenitic high-strength heat-resistance steel that MX phase is strengthened mutually with M23C6 Carbide Precipitation, anti-oxidant, welding and processing characteristics all good, at present as the superheater of ultra supercritical station boiler, the preferred material of reheater piping and being widely used in worldwide.
Now confirm that in super 304H steel, topmost hardening constituent is rich copper nanophase.Because in clean steel, carbon, nitrogen content are extremely low, the effect of traditional micro alloying element cannot be not fully exerted.Therefore, when material alloysization designs, the intensified element selecting not rely on carbon, nitrogen is needed.Copper is that one does not need C, N element, can produce the alloying element of strong precipitating reinforcing effect in steel.Meanwhile, its precipitated phase has good plasticity, thus ensure that steel has high-ductility while having high strength.In addition, it can also improve the anticorrosive of steel and welding performance, so Cu is ideal intensified element in high purity steel.
In steel, add copper, the corrosion resistance of steel, intensity can be improved, improve weldability, improve fatigue resistance, mouldability and machinability etc.Although copper has many excellent effects in steel, when the content of copper in steel reaches some, when steel is heated to general hot processing temperature, obvious hot-short tendency can be produced, therefore, in steel, adding of copper is restricted, and it is only used as anticorrosive element in structural steel for a long time.But when in steel, copper content is lower than 0.6wt%, without obvious invigoration effect, when only having the content of copper to be greater than 0.75wt%, its invigoration effect just can manifest.Along with the progress of modern metallurgical technology, steel alloying component control accuracy improves greatly, impurity content obviously declines, steel is more and more purer, after the hot-working of copper-bearing alloy steel, through Wetted constructures, the tiny and precipitate of Dispersed precipitate can make strength level increase substantially, and the matrix of high-purity and the precipitate particle of high-ductility ensure that the high-strength tenacity of steel simultaneously.In addition, by the tissue that coordinate come refinement steel of specific heat treatment with pick-up behavior, to improve steel performance further.
In current existing material and technology of preparing, the subject matter existed is: due to rich copper nanophase skewness in the base, effectively can not control the precipitation of nanophase, evenly can not prepare high strength, anti-oxidant, welding and all good strengthening steel of processing characteristics.Therefore, a kind of elevated temperature strength steel with heterogeneous forming core of exploitation and preparation method thereof is needed.
Summary of the invention
Technical problem to be solved by this invention is to provide the particle reinforced steel of a kind of high-strength nano.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
The particle reinforced steel of a kind of high-strength nano, is characterized in that, comprise the material of following parts by weight: iron powder 35-46 part, Nano silicon dioxide dispersion 11-15 part, copper 58-70 part, paraffin 5-12 part, brass powder 16-22 part, spheroidal graphite cast-iron powder 5-17 part, aluminium hydroxide 3-4 part, nanoscale silicon 11-14 part of modification, halogenated phosphate 10-12 part, alumina silicate 3-8 part, sand 12-23 part, glass fibre 25-40 part.
The invention has the beneficial effects as follows: toughness of the present invention is better, and even tissue, intensity and toughness are all improved, and reach obdurability requirement.
Detailed description of the invention
Embodiment 1
The particle reinforced steel of a kind of high-strength nano, comprises the material of following parts by weight: iron powder 46 parts, Nano silicon dioxide dispersion 11 parts, copper 70 parts, 12 parts, paraffin, brass powder 16-22 part, 5 parts, spheroidal graphite cast-iron powder, 3 parts, aluminium hydroxide, the nanoscale silicon of modification 11 parts, halogenated phosphate 10-12 part, alumina silicate 8 parts, 12 parts, sand, 40 parts, glass fibre.
Claims (1)
1. the particle reinforced steel of high-strength nano, is characterized in that, comprises the material of following parts by weight: iron powder 35-46 part, Nano silicon dioxide dispersion 11-15 part, copper 58-70 part, paraffin 5-12 part, brass powder 16-22 part, spheroidal graphite cast-iron powder 5-17 part, aluminium hydroxide 3-4 part, nanoscale silicon 11-14 part of modification, halogenated phosphate 10-12 part, alumina silicate 3-8 part, sand 12-23 part, glass fibre 25-40 part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410435724.9A CN104226981A (en) | 2014-08-31 | 2014-08-31 | Nano particle hardened steel with high strength |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410435724.9A CN104226981A (en) | 2014-08-31 | 2014-08-31 | Nano particle hardened steel with high strength |
Publications (1)
| Publication Number | Publication Date |
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| CN104226981A true CN104226981A (en) | 2014-12-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410435724.9A Pending CN104226981A (en) | 2014-08-31 | 2014-08-31 | Nano particle hardened steel with high strength |
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| CN (1) | CN104226981A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115446301A (en) * | 2021-05-21 | 2022-12-09 | 中国科学院大连化学物理研究所 | Copper nanoparticle material and preparation and application thereof |
-
2014
- 2014-08-31 CN CN201410435724.9A patent/CN104226981A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115446301A (en) * | 2021-05-21 | 2022-12-09 | 中国科学院大连化学物理研究所 | Copper nanoparticle material and preparation and application thereof |
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Legal Events
| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20141224 |