CN107740035A - A kind of steel part with anti-corrosion infiltration layer - Google Patents
A kind of steel part with anti-corrosion infiltration layer Download PDFInfo
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- CN107740035A CN107740035A CN201710916658.0A CN201710916658A CN107740035A CN 107740035 A CN107740035 A CN 107740035A CN 201710916658 A CN201710916658 A CN 201710916658A CN 107740035 A CN107740035 A CN 107740035A
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
- C23C10/06—Solid state diffusion of only metal elements or silicon into metallic material surfaces using gases
- C23C10/14—Solid state diffusion of only metal elements or silicon into metallic material surfaces using gases more than one element being diffused in one step
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Abstract
The invention discloses a kind of steel part with anti-corrosion infiltration layer, base material is 304 stainless steels, and substrate surface covers anti-corrosion layer, 50 80 μm of the anti-corrosion layer thickness, and composition includes NiAl and Ni3Al, the mass fraction that the NiAl is accounted for are 20 30wt%, Ni3The mass fraction that Al is accounted for is 70 80wt%.The corrosion-resistant quality layer of the present invention is good, due to that, as source electrode material, N can be generated in reaction from aluminium nitride AlN2, play a part of protecting gas, avoid that other oxidation reactions occur, ensure that steel top layer has higher cleanliness factor；Surface main component is NiAl and Ni3Al, improve the adhesion between infiltration layer and matrix；Carry out that in stainless steel surfaces more complete fine and close anti-corrosion aluminium oxide surface layer can be formed with the time, so as to effectively anticorrosive.
Description
Technical field
The present invention relates to a kind of steel part with anti-corrosion infiltration layer, belong to metal processing sectors.
Background technology
Stainless steel is widely applied due to its excellent performance in the various aspects of production and living.It can lead to
Cross a variety of methods and obtain stainless steel finished product.In powder metallurgy, powder of stainless steel is densified by high temperature sintering to finally give
Product, wherein vacuum-sintering are exactly a method being in daily use.But in vacuum-sintering, the Cr element meetings of antirust in stainless steel
Volatilization, so as to influence the performance of stainless steel product.Therefore, it may be considered that apply protective coating in stainless steel surfaces and be used for increasing it
Corrosion resistance, but, in practice it has proved that it is easy to take off between protective coating and stainless steel base and splits, thus how lifts stainless steel watch
The corrosion resistance in face is the task of top priority.
The content of the invention
In view of the above-mentioned problems of the prior art, it is an object of the invention to provide a kind of steel part with anti-corrosion infiltration layer,
The surface corrosion resistance of steel can be enable to be improved, extend service life.
To achieve the above object, the technical solution adopted by the present invention is：A kind of steel part with anti-corrosion infiltration layer, including base
Material, the base material are 304 stainless steels, and substrate surface covering anti-corrosion layer, 50-80 μm of the anti-corrosion layer thickness, composition includes
NiAl and Ni3Al, the mass fraction that the NiAl is accounted for are 20-30wt%, Ni3The mass fraction that Al is accounted for is 70-80wt%.
As currently preferred technical scheme, 80 μm of the anti-corrosion layer thickness.
As currently preferred technical scheme, the mass fraction that NiAl is accounted in the anti-corrosion layer is 30wt%, Ni3Al
The mass fraction accounted for is 70wt%.
The corrosion-resistant quality layer of the present invention is good, due to that, as source electrode material, can be generated in reaction from aluminium nitride AlN
N2, play a part of protecting gas, avoid that other oxidation reactions occur, ensure that steel top layer has higher cleanliness factor；Surface master
It is NiAl and Ni to want composition3Al, improve the adhesion between infiltration layer and matrix；With the time can be formed in stainless steel surfaces
More complete fine and close anti-corrosion aluminium oxide surface layer, so as to effectively anticorrosive.After surface forms oxide-film, can effectively it prevent
Oxygen atom penetrates further into, integral surface stable performance.
Embodiment
The present invention is described in further detail with reference to embodiment.
Embodiment 1
Method for treating stainless steel surfaces, comprise the following steps：
(1) interception size 15*15*10mm steel sample is as base material, from aluminium nitride AlN as source electrode material；
(2) steel sample is subjected to machine after the polishing of multi-pass sand paper, polishing with 0.5 μm of diamond spraying polishing agent
Tool polishes, then in acetone, alcohol, deionized water is cleaned by ultrasonic 10min successively, and after drying, encapsulation is stand-by；
(3) aluminising processing is carried out with double glow discharge alloying process vacuum drying oven, by the use of stainless steel cylinder as auxiliary cathode,
Base material and aluminium nitride AlN are placed in auxiliary cathode；
(4) start to be surface-treated：Technological parameter is frequency 55Hz, die opening 15mm, 800 DEG C of holding temperature, soaking time
2h, source voltage 400V, cathode voltage 300V, sample cools to room temperature with the furnace after processing.
Aluminized coating phase structure is analyzed using X-ray diffractometer, is distributed, adopted with energy spectrometer analysis specimen surface and cross sectional elements
With the increasing weight of oxidation of electronic balance (precision 0.1mg) measure alumetized steel.
Testing result shows that infiltration layer forms good metallurgical binding with matrix, and surface A l mass fraction is
23.31%；
Material phase analysis shows that main coordinate of infiltration layer is divided into NiAl and Ni3The mass fraction that Al, NiAl are accounted for is 30wt%,
Ni3The mass fraction that Al is accounted for is 70wt%.Due to solubility very little of the aluminium in Fe matrixes, and the affinity of al and ni than aluminium and
The affinity of iron is big, therefore preferentially forms nickel alumin(i)um alloy, and nickel alumin(i)um alloy improves the adhesion between infiltration layer and matrix, resistance to through measuring
80 μm of corrosion layer thickness.
Oxidation 2h being carried out to sample at 600 DEG C, after oxidation after EDS analyses, it can be seen that superficial layer is mainly Al, O element,
And surface A l and O atomic ratio are about 0.641, close to Al2O3The theoretical ratio of middle atom, thereby it is assumed that, the oxidized place of sample
Surface main component after reason is Al2O3., from reflecting on the other hand, the present invention can form more complete in stainless steel surfaces for this
Fine and close aluminium surface layer, so as to effectively anticorrosive.
Sample is further aoxidized into 4h, 6h at 600 DEG C, finds weightening phenomenon unobvious, after illustrating that surface forms oxide-film,
Penetrating further into for oxygen atom, integral surface stable performance can effectively be prevented.
Embodiment 2
Method for treating stainless steel surfaces, comprise the following steps：
(1) interception size 15*15*10mm steel sample is as base material, from aluminium nitride AlN as source electrode material；
(2) steel sample is subjected to machine after the polishing of multi-pass sand paper, polishing with 0.5 μm of diamond spraying polishing agent
Tool polishes, then in acetone, alcohol, deionized water is cleaned by ultrasonic 10min successively, and after drying, encapsulation is stand-by；
(3) aluminising processing is carried out with double glow discharge alloying process vacuum drying oven, by the use of stainless steel cylinder as auxiliary cathode,
Base material and aluminium nitride AlN are placed in auxiliary cathode；
(4) start to be surface-treated：Technological parameter is frequency 60Hz, die opening 10mm, 900 DEG C of holding temperature, soaking time
3h, source voltage 400V, cathode voltage 400V, sample cools to room temperature with the furnace after processing.
Through measurement, surface composition is NiAl and Ni3The mass fraction that Al, NiAl are accounted for is 20wt%, Ni3The quality that Al is accounted for point
Number is 80wt%, 50 μm of anti-corrosion layer thickness.Other performance is consistent with the properties of sample of embodiment 1.
Embodiment 3
Method for treating stainless steel surfaces, comprise the following steps：
(1) interception size 15*15*10mm steel sample is as base material, from aluminium nitride AlN as source electrode material；
(2) steel sample is subjected to machine after the polishing of multi-pass sand paper, polishing with 0.5 μm of diamond spraying polishing agent
Tool polishes, then in acetone, alcohol, deionized water is cleaned by ultrasonic 10min successively, and after drying, encapsulation is stand-by；
(3) aluminising processing is carried out with double glow discharge alloying process vacuum drying oven, by the use of stainless steel cylinder as auxiliary cathode,
Base material and aluminium nitride AlN are placed in auxiliary cathode；
(4) start to be surface-treated：Technological parameter is frequency 55Hz, die opening 15mm, 800 DEG C of holding temperature, soaking time
2h, source voltage 600V, cathode voltage 400V, sample cools to room temperature with the furnace after processing.
Through measurement, surface composition is NiAl and Ni3The mass fraction that Al, NiAl are accounted for is 30wt%, Ni3The quality that Al is accounted for point
Number is 70wt%, 70 μm of anti-corrosion layer thickness.Other performance is consistent with the properties of sample of embodiment 1.
Claims (3)
1. a kind of steel part with anti-corrosion infiltration layer, it is characterised in that including base material, the base material is 304 stainless steels, substrate surface
Anti-corrosion layer, 50-80 μm of the anti-corrosion layer thickness are covered, composition includes NiAl and Ni3Al, the mass fraction that the NiAl is accounted for
For 20-30wt%, Ni3The mass fraction that Al is accounted for is 70-80wt%.
A kind of 2. steel part with anti-corrosion infiltration layer according to claim 1, it is characterised in that the anti-corrosion layer thickness 80
μm。
A kind of 3. steel part with anti-corrosion infiltration layer according to claim 1, it is characterised in that NiAl in the anti-corrosion layer
The mass fraction accounted for is 30wt%, Ni3The mass fraction that Al is accounted for is 70wt%.
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| CN201710916658.0A CN107740035A (en) | 2017-09-30 | 2017-09-30 | A kind of steel part with anti-corrosion infiltration layer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108866536A (en) * | 2018-06-26 | 2018-11-23 | 新余学院 | A kind of nanometer crystalline Ni Al/Ni of fabricated in situ3The preparation method of compound coat between Al bimetallic |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107740036A (en) * | 2017-09-28 | 2018-02-27 | 徐州东南钢铁工业有限公司 | A kind of method for treating stainless steel surfaces for lifting antiseptic power |
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2017
- 2017-09-30 CN CN201710916658.0A patent/CN107740035A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107740036A (en) * | 2017-09-28 | 2018-02-27 | 徐州东南钢铁工业有限公司 | A kind of method for treating stainless steel surfaces for lifting antiseptic power |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108866536A (en) * | 2018-06-26 | 2018-11-23 | 新余学院 | A kind of nanometer crystalline Ni Al/Ni of fabricated in situ3The preparation method of compound coat between Al bimetallic |
| CN108866536B (en) * | 2018-06-26 | 2020-06-16 | 新余学院 | In-situ synthesized nanocrystalline NiAl/Ni3Preparation method of Al bimetal compound coating |
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Application publication date: 20180227 |
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