CN117305756B - A metal component - Google Patents
A metal componentInfo
- Publication number
- CN117305756B CN117305756B CN202311442569.9A CN202311442569A CN117305756B CN 117305756 B CN117305756 B CN 117305756B CN 202311442569 A CN202311442569 A CN 202311442569A CN 117305756 B CN117305756 B CN 117305756B
- Authority
- CN
- China
- Prior art keywords
- coating
- chromium
- chromium nitride
- contact surface
- metal
- Prior art date
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Classifications
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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
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
- C23C8/24—Nitriding
- C23C8/26—Nitriding of ferrous surfaces
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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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
-
- 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
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/40—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using liquids, e.g. salt baths, liquid suspensions
- C23C8/42—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using liquids, e.g. salt baths, liquid suspensions only one element being applied
- C23C8/48—Nitriding
- C23C8/50—Nitriding of ferrous surfaces
-
- 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
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/60—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using solids, e.g. powders, pastes
- C23C8/62—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using solids, e.g. powders, pastes only one element being applied
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
本发明涉及金属表面处理技术领域，公开一种金属部件，金属部件包括金属基体，所述金属基体为低碳不锈钢，并具有接触表面，所述接触表面形成有渗氮层。接触表面渗氮可以提高金属基体的接触表面的抗气蚀性能，特别是微孔内表面的抗气蚀性能，可以提高低碳不锈钢金属基材的接触表面的硬度，在采用低碳不锈钢耐高温甲醇及甲酸腐蚀的同时，可以具有较好的硬度。所述渗氮层的表面形成有硅涂层，利用硅涂层的耐酸腐蚀的特性，进一步降低低碳不锈钢的接触表微量的碳以碳化合物形式析出的风险，对金属基体的接触表面的耐腐蚀性能形成二次强化。
This invention relates to the field of metal surface treatment technology, and discloses a metal component comprising a metal substrate, wherein the metal substrate is low-carbon stainless steel, and has a contact surface on which a nitrided layer is formed. Nitriding the contact surface can improve the cavitation resistance of the metal substrate's contact surface, particularly the cavitation resistance of the microporous inner surface, and can improve the hardness of the contact surface of the low-carbon stainless steel substrate. While using low-carbon stainless steel to resist high-temperature methanol and formic acid corrosion, it can also possess good hardness. A silicon coating is formed on the surface of the nitrided layer. Utilizing the acid corrosion resistance of the silicon coating, the risk of trace amounts of carbon on the contact surface of the low-carbon stainless steel precipitating in the form of carbon compounds is further reduced, thus providing a secondary strengthening of the corrosion resistance of the metal substrate's contact surface.
Description
Technical Field
The invention relates to the technical field of metal surface treatment, in particular to a metal part.
Background
The invention mainly solves the problems of corrosion and abrasion of a valve seat of a methanol direct injection fuel injector in a high-temperature methanol environment and cavitation on the surface of the valve seat in a high-pressure gradient methanol fluid environment, and provides an anti-cavitation scheme for solving the problem that an ion sputtering process is applied to a microporous structural member. A plurality of cases of abrasion of the valve seat of the direct injection fuel injector occur in the verification test process, and carbon elements on the surface of the valve seat are separated out under the high-temperature methanol environment through failure mode analysis, so that the surface is accelerated to be abraded, the sealing function of the valve seat is invalid, and the fuel injector drips and leaks methanol. Therefore, the methanol direct injection fuel injector needs to adopt low-carbon stainless steel and adopts a coating technology to improve the surface wear resistance and corrosion resistance.
The valve seat coatings disclosed in the prior art, such as valve seat DLC coatings, are metastable amorphous materials that combine to form sp3 and sp2 bonds. Because the base material of the low-carbon acid-resistant stainless steel valve seat is softer, the sealing surface of the base material can slightly deform when the oil sprayer works, the deformation can cause the internal stress of the DLC coating to be increased, and finally sp3 and sp2 bond fracture failure is caused. Thus, currently, valve seats of conventional materials and DLC processes are not suitable for methanol direct injection injector valve seats.
The valve seat material needs to have higher hardness and wear resistance, so the valve seat material needs to be made of stainless steel with carbon content of more than 0.2 percent. Meanwhile, the valve seat material needs stronger corrosion resistance, including high-temperature methanol resistance and corrosion of methanoic acid and derivatives generated by methanol in a high-temperature methanol environment. Stainless steel with good high temperature methanol and formic acid corrosion resistance is generally low carbon alloy stainless steel with carbon content below 0.1%. And the corrosion-resistant stainless steel with carbon content below 0.1% has low hardness and cannot meet the wear resistance requirement of the valve seat. The two performance requirements are in technical conflict with the need for carbon content.
Disclosure of Invention
The invention discloses a metal part which is used for meeting the requirements of low-carbon steel on high-temperature methanol and formic acid corrosion resistance and high hardness and relieving the technical contradiction of carbon content requirements.
In order to achieve the above purpose, the present invention provides the following technical solutions:
A metal part includes a metal base body that is low-carbon stainless steel and has a contact surface formed with a nitriding layer. Nitriding the contact surface can improve cavitation resistance of the contact surface of the metal matrix, particularly cavitation resistance of the inner surface of the micropore, can improve hardness of the contact surface of the low-carbon stainless steel metal matrix, and has better hardness when the low-carbon stainless steel is adopted to resist high-temperature methanol and formic acid corrosion. The surface of the nitriding layer is provided with a silicon coating, and the risk that trace carbon in the contact surface of the low-carbon stainless steel is precipitated in a carbon compound form is further reduced by utilizing the acid corrosion resistance characteristic of the silicon coating, so that the corrosion resistance of the contact surface of the metal substrate is secondarily strengthened.
Optionally, the nitrided layer has a thickness between 2 μm and 20 μm.
Optionally, the metal matrix is low-carbon stainless steel with carbon content below 0.1%.
Optionally, a silicon coating is formed on the surface of the nitriding layer.
Optionally, the thickness of the silicon coating is between 0.1 μm and 0.5 μm.
Optionally, a chromium nitride coating is formed on the surface of the silicon coating facing away from the nitriding layer.
Optionally, the chromium nitride coating has a chromium nitride content of greater than 80%, and the chromium nitride coating has a thickness of between 0.6 μm and 1 μm.
Optionally, a sealing functional layer is formed on the surface of the chromium nitride coating, which faces away from the silicon coating, the hardness of the sealing functional layer is lower than that of the chromium nitride coating, and the corrosion resistance of the sealing functional layer is higher than that of the chromium nitride coating.
Optionally, the sealing functional layer is a chromium coating.
Optionally, the thickness of the chromium coating is between 0.3 μm and 0.7 μm.
Optionally, a gradual transition layer is arranged between the chromium coating and the chromium nitride coating, and in the gradual transition layer, along the direction from the chromium nitride coating to the chromium coating, the content of chromium nitride is gradually reduced, and the content of chromium is gradually increased.
Optionally, the metal substrate is a valve seat of the direct methanol injection fuel injector, and the contact surface is a contact sealing surface between the valve seat and the valve core.
Drawings
FIG. 1 is a schematic view of a part of a metal part according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a direct methanol injection injector according to an embodiment of the present application;
FIG. 3 is a schematic view of the valve core in FIG. 2;
Fig. 4 is a schematic view of the valve seat of fig. 2.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, the metal part provided by the embodiment of the application can adapt to a high-temperature methanol corrosion environment, can be a kinematic pair part which is applied to various purposes and is contacted with high-temperature methanol, and comprises a metal substrate 1, wherein the metal substrate 1 is low-carbon stainless steel, for example, low-carbon stainless steel with carbon content of less than 0.1%, the type of stainless steel has good high-temperature methanol and formic acid corrosion resistance, and is provided with a contact surface S, and a nitriding layer 2 is formed on the contact surface S. Nitriding the contact surface S can improve cavitation resistance of the contact surface S of the metal matrix 1, particularly cavitation resistance of the inner surface of the micropore, can improve hardness of the contact surface S of the low-carbon stainless steel metal substrate, and can have better hardness when adopting low-carbon stainless steel to resist high-temperature methanol and formic acid corrosion. The surface of the nitriding layer 2 is provided with a silicon coating 3, and the risk that trace carbon on the contact surface S of the low-carbon stainless steel is precipitated in the form of a carbon compound is further reduced by utilizing the acid corrosion resistance characteristic of the silicon coating 3, so that the corrosion resistance of the contact surface S of the metal substrate 1 is secondarily strengthened. The silicon coating 3 may be a siliconizing layer formed by a siliconizing process as a high temperature methanol corrosion resistant layer to prevent corrosion of the metal substrate 1 by high temperature methanol. Specifically, the silicon coating 3 may be formed using an ion sputtering process.
The contact surface S refers to a surface that contacts methanol or a high-temperature methanol environment and carries an impact load or a friction load, and may be a sealing contact surface of a valve seat and a valve ball of a valve element.
In a specific embodiment, the nitriding layer 2 has a thickness of between 2 μm and 20 μm, specifically 2 μm, 4 μm, 6 μm, 7 μm, 9 μm, 12 μm, 14 μm, 15 μm, 17 μm, 19 μm, 20 μm, etc., within which the cavitation resistance of the microporous inner surface can be sufficiently improved while the surface hardness of the metal base 1 is improved and while the nitriding cost is limited to a reasonable range.
In a specific embodiment, the thickness of the silicon coating 3 is between 0.1 μm and 0.5 μm, and may be specifically 0.1 μm, 0.2 μm, 0.3 μm, 0.4 μm, 0.5 μm, etc. When the thickness of the silicon coating layer 3 is within this range, the carbon precipitation as a carbon compound can be sufficiently reduced, and the corrosion resistance can be sufficiently achieved while achieving reasonable cost.
In a specific embodiment, the surface of the silicon coating 3 facing away from the nitrided layer 2 is formed with a chromium nitride coating 4. The chromium nitride coating 4 can simultaneously improve the wear resistance and corrosion resistance of the contact surface S of the metal substrate 1 subjected to impact load. The chromium nitride coating 4 may be a chromium nitride layer formed by a chromium nitride process, which has a higher hardness and better impact resistance than the silicon coating 3.
In a specific embodiment, the chromium nitride content in the chromium nitride coating 4 is greater than 80%, and the thickness of the chromium nitride coating 4 is between 0.6 μm and 1 μm, which may be specifically 0.6 μm, 0.7 μm, 0.8 μm, 0.9 μm, 1 μm, etc. When the thickness of the chromium nitride coating 4 is within this range, it is possible to maintain the wear resistance of the contact surface S and the corrosion resistance of the contact surface S while giving a reasonable cost.
In a specific embodiment, the surface of the chromium nitride coating 4 facing away from the silicon coating 3 is formed with a sealing functional layer 5, and the hardness of the sealing functional layer 5 is lower than that of the chromium nitride coating 4, so that the running-in speed between the contact surface S and the matched surface can be increased, for example, the running-in speed of the valve seat, the valve core and the valve ball is increased, the sealing surface is rapidly formed at the initial stage of the operation of the fuel injector, and the corrosion resistance of the sealing functional layer 5 is higher than that of the chromium nitride coating 4, so as to further improve the corrosion resistance.
In a specific embodiment, the sealing functional layer 5 is a chromium coating, the hardness of the chromium coating is lower than that of the chromium nitride coating 4, and the corrosion resistance is higher than that of the chromium nitride coating 4, so that the sealing functional layer 5 can be used as a material of ideal sealing functional layer 5. The thickness of the chromium coating may be between 0.3 μm and 0.7 μm, and may specifically be 0.3 μm, 0.4 μm, 0.5 μm, 0.6 μm, 0.7 μm, etc. The thickness range can simultaneously give consideration to hardness, corrosion resistance and reasonable cost.
In a specific embodiment, a gradual transition layer is arranged between the chromium coating and the chromium nitride coating 4, in the gradual transition layer, along the direction from the chromium nitride coating 4 to the chromium coating, the content of chromium nitride is gradually reduced, and the content of chromium is gradually increased so as to gradually evolve towards the components of the chromium coating, and the situation that the components cannot be well combined due to overlarge component difference between the chromium coating and the chromium nitride coating is avoided.
Referring to fig. 2 to 4, a conical surface on the injector valve seat a contacts with the ball of the valve core b to form a contact sealing surface. The ball head of the valve core b and the conical sealing surface of the valve seat a form a kinematic pair which is subjected to impact load. In a specific embodiment, the metal substrate 1 is a valve seat a of a direct methanol injection fuel injector, and the contact surface S is a contact sealing surface of the valve seat a and the valve core b. The valve seat a is arranged at the oil outlet end of the valve body c, the valve core b is arranged in the space of the valve body c, and the valve ball at the end part is in sealing fit with the contact sealing surface of the valve seat a. By surface-treating the contact surface S of the valve seat a, the hardness of the contact sealing surface of the valve seat a and the valve body b can be increased, and carbon precipitation of the valve seat a can be prevented by using low-carbon stainless steel.
It will be apparent to those skilled in the art that various modifications and variations can be made to the embodiments of the present invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (8)
1. The metal part is characterized by comprising a metal matrix, wherein the metal matrix is a valve seat of a methanol direct injection fuel injector and is provided with a contact surface, a nitriding layer is formed on the contact surface, a silicon coating is formed on the surface of the nitriding layer, and the carbon content of the metal matrix is below 0.1%;
a chromium nitride coating is formed on the surface of the silicon coating, which faces away from the nitriding layer;
A sealing function layer is formed on the surface, facing away from the silicon coating, of the chromium nitride coating, the hardness of the sealing function layer is lower than that of the chromium nitride coating, and the corrosion resistance of the sealing function layer is higher than that of the chromium nitride coating;
The contact surface is a contact sealing surface of the valve seat and the valve core, and the contact sealing surface and the valve core form a kinematic pair subjected to impact load.
2. The metal part according to claim 1, characterized in that the thickness of the nitrided layer is between 2 μm and 20 μm.
3. The metal part according to claim 1, wherein the metal matrix is a low carbon stainless steel having a carbon content of 0.1% or less.
4. A metal part according to claim 3, characterized in that the thickness of the silicon coating is between 0.1 μm and 0.5 μm.
5. The metal part according to claim 1, characterized in that the chromium nitride coating has a chromium nitride content of more than 80% and the chromium nitride coating has a thickness of between 0.6 and 1 μm.
6. The metal component of claim 1, wherein the sealing function layer is a chromium coating.
7. The metal component of claim 1, wherein the chromium coating has a thickness of between 0.3 μιη and 0.7 μιη.
8. The metal component of claim 6, wherein there is a graded transition layer between the chromium coating and the chromium nitride coating;
In the gradual transition layer, along the direction from the chromium nitride coating to the chromium coating, the content of chromium nitride is gradually reduced, and the content of chromium is gradually increased.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311442569.9A CN117305756B (en) | 2023-11-01 | 2023-11-01 | A metal component |
| PCT/CN2024/116179 WO2025045241A1 (en) | 2023-08-31 | 2024-08-31 | Injector valve seat and preparation method therefor, injector, engine, and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311442569.9A CN117305756B (en) | 2023-11-01 | 2023-11-01 | A metal component |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117305756A CN117305756A (en) | 2023-12-29 |
| CN117305756B true CN117305756B (en) | 2025-11-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311442569.9A Active CN117305756B (en) | 2023-08-31 | 2023-11-01 | A metal component |
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| Country | Link |
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| CN (1) | CN117305756B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2025045241A1 (en) * | 2023-08-31 | 2025-03-06 | 浙江绿色智行科创有限公司 | Injector valve seat and preparation method therefor, injector, engine, and vehicle |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2584098A1 (en) * | 1985-06-27 | 1987-01-02 | Air Liquide | Process for depositing a silicon coating on a metal article |
| CN104271802A (en) * | 2012-02-16 | 2015-01-07 | 马勒发动机零部件巴西有限公司 | Sliding element for use in internal combustion engines |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5607779A (en) * | 1992-12-22 | 1997-03-04 | Citizen Watch Co., Ltd. | Hard carbon coating-clad base material |
| DE10013198A1 (en) * | 2000-03-17 | 2001-09-20 | Siemens Ag | Injector for a combustion engine injection unit, comprises a fuel nozzle with an opening, a nozzle needle and a guide. |
| CN204451373U (en) * | 2015-01-07 | 2015-07-08 | 吴江市锦亿嘉纺织品有限公司 | Multi-functional coatings corrosion resistant plate |
| CN105296858A (en) * | 2015-11-11 | 2016-02-03 | 杨秋香 | High-performance engine inlet valve and preparing method thereof |
| CN205493579U (en) * | 2016-03-07 | 2016-08-24 | 武汉苏泊尔炊具有限公司 | Antirust iron pan |
| CN110055490A (en) * | 2019-05-05 | 2019-07-26 | 兰州理工大学温州泵阀工程研究院 | A kind of compounding method on austenitic stainless steel surface layer |
| CN116770218A (en) * | 2023-06-21 | 2023-09-19 | 常州大学 | High-wear-resistance corrosion-resistance composite strengthening layer for metal surface and preparation method thereof |
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2023
- 2023-11-01 CN CN202311442569.9A patent/CN117305756B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2584098A1 (en) * | 1985-06-27 | 1987-01-02 | Air Liquide | Process for depositing a silicon coating on a metal article |
| CN104271802A (en) * | 2012-02-16 | 2015-01-07 | 马勒发动机零部件巴西有限公司 | Sliding element for use in internal combustion engines |
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| CN117305756A (en) | 2023-12-29 |
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Address after: 315336 No. 276 Xingci Road, Building 4, Room 351, Qianwei Comprehensive Bonded Area, Ningbo City, Zhejiang Province Patentee after: Zhejiang Green Zhixing Science and Technology Innovation Co.,Ltd. Country or region after: China Patentee after: ZHEJIANG GEELY HOLDING GROUP Co.,Ltd. Address before: 315327 Zhejiang Province, Ningbo City, Hangzhou Bay New District, Second Floor of Chongchuang, No.7 Building C117 Room Patentee before: Zhejiang Green Zhixing Science and Technology Innovation Co.,Ltd. Country or region before: China Patentee before: ZHEJIANG GEELY HOLDING GROUP Co.,Ltd. |