CN111498387A - Wear-resistant and corrosion-resistant gradient coating for middle groove of scraper conveyor - Google Patents
Wear-resistant and corrosion-resistant gradient coating for middle groove of scraper conveyor Download PDFInfo
- Publication number
- CN111498387A CN111498387A CN202010314585.XA CN202010314585A CN111498387A CN 111498387 A CN111498387 A CN 111498387A CN 202010314585 A CN202010314585 A CN 202010314585A CN 111498387 A CN111498387 A CN 111498387A
- Authority
- CN
- China
- Prior art keywords
- coating
- resistant
- gradient
- corrosion
- wear
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G19/00—Conveyors comprising an impeller or a series of impellers carried by an endless traction element and arranged to move articles or materials over a supporting surface or underlying material, e.g. endless scraper conveyors
- B65G19/18—Details
- B65G19/28—Troughs, channels, or conduits
- B65G19/30—Troughs, channels, or conduits with supporting surface modified to facilitate movement of loads, e.g. friction reducing devices
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/0047—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents
- C22C32/0052—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents only carbides
-
- 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
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
- C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Abstract
The invention relates to a wear-resistant and corrosion-resistant gradient coating for a middle groove of a scraper conveyor, which can effectively solve the problems of uneven wear, serious corrosion and easy shedding of the coating of the traditional middle plate to a certain extent. The technical scheme of the invention is as follows: the components of the coating are changed in a gradient mode, and the total number is three. From the base body to the outside, the coating components are as follows according to the weight percentage, and the gradient coating is-1: 43% -48% of Ni50, 47% -52% of Ni60, 1% -3% of TiC and 2% -4% of WC. Gradient coating-2: 38% -43% of Ni50, 42% -47% of Ni60, 6% -8% of TiC and 7% -9% of WC. Gradient coating-3: 33% -38% of Ni50, 37% -42% of Ni60, 11% -13% of TiC and 12% -14% of WC. The wear-resistant and corrosion-resistant gradient coating has the characteristics of low water absorption, good toughness, light weight and the like, and is very wear-resistant and corrosion-resistant. Meanwhile, the gradient change of the components of the coating is controlled, so that the abrupt change of the structure and the performance from the matrix to the coating is avoided, the combination condition between coating interfaces is improved, the bearing capacity and the wear resistance of the coating can be further improved, the integral service life of the middle groove can be effectively prolonged, and the safe and efficient operation of the scraper conveyor is ensured.
Description
Technical Field
The invention relates to the technical field of coating of a middle groove of a scraper conveyor, in particular to a wear-resistant and corrosion-resistant gradient coating of the middle groove of the scraper conveyor.
Background
Coal is a main energy source in China, the content of the coal is about 7200 hundred million tons, and a comprehensive mechanized coal mining technology (called fully mechanized coal mining technology for short) is a mining technology commonly adopted by various large coal industry groups at present. The scraper conveyor is used as a main bearing and conveying device and plays an indispensable important role in the whole fully mechanized mining face. The middle trough is used as a key part of the scraper conveyor, and the service life of the whole scraper conveyor is influenced by the quality of the middle trough. In the coal mining process, the scraper and the chain continuously rub against the middle plate to cause rapid abrasion of the middle groove middle plate, particularly the abrasion of the chain channel position of the middle plate is the most serious, so that the uneven abrasion failure of the middle plate is caused. In addition, the corrosion phenomenon of the middle plate is also very serious due to the complex and severe coal mining environment.
In order to solve the problem of abrasion and corrosion of the middle plate of the middle groove, in the prior patent, namely 'a low-friction-coefficient scraper conveyer middle groove abrasion-resistant middle plate and a production method thereof', patent No. 201811406511.8, a method for cladding a latticed alloy abrasion-resistant layer on the surface of a middle plate main body and coating an anti-abrasion coating in a grid of the alloy abrasion-resistant layer is adopted to improve the abrasion resistance of the middle plate of the middle groove, and the method greatly improves the abrasion resistance of the middle plate of the middle groove. In a patent of a repair method for a middle groove of a scraper conveyor, patent No. 201010599645.3, high-chromium cast iron powder is spray-welded on the surface of a middle plate of the middle groove by a plasma spray welding technology for repair, and the method also improves the wear resistance of the middle plate to a certain extent. Although the wear resistance of the middle groove middle plate is improved by the surface treatment technology, the problems of uneven wear and serious corrosion of the middle groove middle plate are still not solved, and the phenomenon of coating peeling is caused by abrupt change of the performance of the combination position of the coating and the substrate.
Therefore, it is necessary to develop a method for treating a middle trough middle plate of a scraper conveyor to solve the problems of uneven wear, severe corrosion and coating peeling of the middle trough middle plate.
Disclosure of Invention
The invention aims to provide a wear-resistant and corrosion-resistant gradient coating for a middle groove of a scraper conveyor, which can effectively solve the problems of uneven wear and serious corrosion of the existing middle plate and easy falling of the coating to a certain extent, improve the wear resistance and corrosion resistance of the middle plate, prolong the integral service life of the middle groove and ensure the safe and efficient operation of the scraper conveyor.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the wear-resistant and corrosion-resistant gradient coating for the middle groove of the scraper conveyor has three parts in total, wherein the components of the coating are in gradient change. From the base body to the outside, the coating components are as follows according to the weight percentage, and the gradient coating is-1: 43% -48% of Ni50, 47% -52% of Ni60, 1% -3% of TiC and 2% -4% of WC. Gradient coating-2: 38% -43% of Ni50, 42% -47% of Ni60, 6% -8% of TiC and 7% -9% of WC. Gradient coating-3: 33% -38% of Ni50, 37% -42% of Ni60, 11% -13% of TiC and 12% -14% of WC.
The wear-resistant and corrosion-resistant gradient coating has the characteristics of low water absorption, good toughness, light weight and the like, and is mainly characterized by high wear resistance, corrosion resistance, strong binding force, difficult shedding and long service life. The Ni-based self-fluxing alloy powder has good adaptability to various base materials, is easy to obtain a compact coating with low oxide content, smooth surface, low dilution rate, small porosity and metallurgical bonding with a matrix, has good wettability, corrosion resistance and oxidation resistance, and has moderate price and high cost performance. TiC and WC have high hardness, can be well wetted by Ni metal melt, can form composite powder with Ni-based alloy powder, and enhances the wear resistance of the surface of a metal material. The composite coating of the high-melting-point hard ceramic material such as TiC and WC and the Ni-based alloy powder has the characteristics of obdurability, good manufacturability, high hardness, wear resistance, corrosion resistance, oxidation resistance and the like of metal. In addition, the gradient change of the components of the coating is controlled, so that the mutation of the structure and the performance from the matrix to the coating is avoided, the combination condition between the interfaces of the coating is improved, and the bearing capacity and the wear resistance of the coating can be further improved.
The invention has the beneficial effects that:
the wear-resistant and corrosion-resistant gradient coating has the characteristics of low water absorption, good toughness, light weight and the like, and is mainly characterized by high wear resistance, corrosion resistance, strong binding force, difficult shedding and long service life. In addition, the gradient change of the components of the coating is controlled, so that the mutation of the structure and the performance from the matrix to the coating is avoided, the combination condition between the interfaces of the coating is improved, and the bearing capacity and the wear resistance of the coating can be further improved. In a word, the invention greatly improves the wear resistance and the corrosion resistance of the middle groove to a certain extent, simultaneously solves the problem that the existing coating is easy to peel off, can effectively prolong the integral service life of the middle groove, and ensures the safe and efficient operation of the scraper conveyor.
Drawings
FIG. 1 is a SEM topography of a cross section of a wear-resistant and corrosion-resistant gradient coating obtained in example 1;
FIG. 2 shows the micro-wear morphology of matrix NM360
FIG. 3 is the micro-wear profile of the wear-resistant, corrosion-resistant gradient coating obtained in example 1
FIG. 4 shows the substrate NM360 etching profile
FIG. 5 shows the corrosion profile of the wear-resistant and corrosion-resistant gradient coating obtained in example 1.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, and it should be further understood that when the terms "includes" and/or "including" are used in this specification, they specify the presence of the features, steps, operations, devices, components, and/or combinations thereof.
As introduced in the background art, the phenomena of abrasion and serious corrosion of a middle plate of a middle groove of a scraper conveyor and easy falling of a coating in the operation process exist in the prior art, and in order to solve the technical problems, the invention provides a wear-resistant and corrosion-resistant gradient coating for the middle groove of the scraper conveyor and a preparation method thereof.
The invention provides a wear-resistant and corrosion-resistant gradient coating for a middle groove of a scraper conveyor, and the components of the coating are changed in a gradient manner, and the three components are counted. From the base body to the outside, the coating components are as follows according to the weight percentage, and the gradient coating is-1: 43% -48% of Ni50, 47% -52% of Ni60, 1% -3% of TiC and 2% -4% of WC. Gradient coating-2: 38% -43% of Ni50, 42% -47% of Ni60, 6% -8% of TiC and 7% -9% of WC. Gradient coating-3: 33% -38% of Ni50, 37% -42% of Ni60, 11% -13% of TiC and 12% -14% of WC.
In order to make the technical solutions of the present invention more clearly understood by those skilled in the art, the technical solutions of the present invention will be described in detail below with reference to specific embodiments.
Example 1
A wear-resistant and corrosion-resistant gradient coating material for a middle groove of a scraper conveyor is prepared according to the following weight percentage, namely a gradient coating-1: 45% Ni50, 50% Ni60, 2% TiC, 3% WC. Gradient coating-2: 40% Ni50, 45% Ni60, 7% TiC, 8% WC. Gradient coating-3: 35% Ni50, 40% Ni60, 12% TiC and 13% WC.
Ni50, Ni60, TiC and WC powder are prepared into composite powder for cladding according to the proportion.
Performing ball milling treatment on the composite powder by adopting a planetary ball mill, wherein the ball-material ratio is 10: 1, ball milling for 7 hours to uniformly mix the composite powder and refine the particles.
And cleaning the ball-milled composite powder by using a constant-temperature ultrasonic cleaning machine, wherein the cleaning medium is absolute ethyl alcohol, the cleaning time is 40min, and the temperature is 20 ℃.
And drying the cleaned composite powder by using a drying oven at the drying temperature of 100 ℃ for 1 hour.
And (3) pretreating the surface of the chain channel position of the intermediate plate to remove oil stains, oxides and rust impurities on the surface.
Cladding the coating by adopting a laser cladding mode.
Example 2
A wear-resistant and corrosion-resistant gradient coating material for a middle groove of a scraper conveyor is prepared according to the following weight percentage, namely a gradient coating-1: 43% Ni50, 52% Ni60, 1% TiC, 4% WC. Gradient coating-2: 38% Ni50, 47% Ni60, 6% TiC and 9% WC. Gradient coating-3: 33% Ni50, 42% Ni60, 11% TiC, 14% WC.
Ni50, Ni60, TiC and WC powder are prepared into composite powder for cladding according to the proportion.
Performing ball milling treatment on the composite powder by adopting a planetary ball mill, wherein the ball-material ratio is 10: 1, ball milling for 7 hours to uniformly mix the composite powder and refine the particles.
And cleaning the ball-milled composite powder by using a constant-temperature ultrasonic cleaning machine, wherein the cleaning medium is absolute ethyl alcohol, the cleaning time is 40min, and the temperature is 20 ℃.
And drying the cleaned composite powder by using a drying oven at the drying temperature of 100 ℃ for 1 hour.
And (3) pretreating the surface of the chain channel position of the intermediate plate to remove oil stains, oxides and rust impurities on the surface.
Cladding the coating by adopting a laser cladding mode.
The wear resistance and corrosion resistance of the gradient coatings obtained in examples 1 and 2 and the matrix NM360 were measured.
The abrasion performance of the gradient coatings obtained in the examples 1 and 2 and the abrasion performance of the matrix NM360 are detected by adopting an Rtec MFT-5000 friction abrasion tester, the size of an abrasion sample is 10mm × 10mm × 5mm, under the test conditions that a grinding ball is a steel ball (GCr15, the hardness of the steel ball is 750HV, the diameter of the steel ball is 6.25mm), a load is 50N, the abrasion stroke is 4.5mm, the reciprocating frequency is 4HZ, the abrasion time is 60min, the temperature is room temperature, the steel ball is dry and non-lubricated, before and after the experiment, a test piece is placed into a beaker containing alcohol, the test piece is cleaned in an ultrasonic cleaner for 20 min, after the test piece is fully dried, the abrasion weight loss of the contrast gradient coating and the matrix NM400 is measured, the size of the corrosion sample is 10mm × 10mm × 5mm, the corrosion liquid is mine water solution, under the test conditions that the corrosion sample is soaked in the mine water solution for 48 h, after the full drying, the corrosion weight loss of the contrast gradient coating and the matrix NM400 is measured, and the.
Table 1 shows the results of abrasion weight loss and corrosion weight loss of the matrix NM360, example 1 and example 2
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. .
Claims (3)
1. The wear-resistant and corrosion-resistant gradient coating for the middle groove of the scraper conveyor is characterized in that the components of the coating are in gradient change from a base body to the outside, and the components of the coating are as follows in percentage by weight, namely, the gradient coating is-1: 43% -48% of Ni50, 47% -52% of Ni60, 1% -3% of TiC and 2% -4% of WC; gradient coating-2: 38% -43% of Ni50, 42% -47% of Ni60, 6% -8% of TiC and 7% -9% of WC; gradient coating-3: 33% -38% of Ni50, 37% -42% of Ni60, 11% -13% of TiC and 12% -14% of WC.
2. The gradient coating of claim 1, wherein the coating composition varies in a gradient from the substrate outward, the coating composition being in weight percent as follows, gradient coating-1: 43% -45% of Ni50, 45% -52% of Ni60, 1% -2% of TiC and 3% -4% of WC; gradient coating-2: 38% -40% of Ni50, 45% -47% of Ni60, 6% -7% of TiC and 8% -9% of WC; gradient coating-3: 33% -35% of Ni50, 40% -42% of Ni60, 11% -12% of TiC and 12% -13% of WC.
3. The gradient coating of claim 1, wherein the coating composition varies in a gradient from the substrate outward, the coating composition being in weight percent as follows, gradient coating-1: 45% -48% of Ni50, 47% -50% of Ni60, 2% -3% of TiC and 2% -3% of WC; gradient coating-2: 40% -43% of Ni50, 42% -45% of Ni60, 7% -8% of TiC and 7% -8% of WC; gradient coating-3: 35% -38% of Ni50, 37% -40% of Ni60, 12% -13% of TiC and 12% -13% of WC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010314585.XA CN111498387A (en) | 2020-04-21 | 2020-04-21 | Wear-resistant and corrosion-resistant gradient coating for middle groove of scraper conveyor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010314585.XA CN111498387A (en) | 2020-04-21 | 2020-04-21 | Wear-resistant and corrosion-resistant gradient coating for middle groove of scraper conveyor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111498387A true CN111498387A (en) | 2020-08-07 |
Family
ID=71872872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010314585.XA Pending CN111498387A (en) | 2020-04-21 | 2020-04-21 | Wear-resistant and corrosion-resistant gradient coating for middle groove of scraper conveyor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111498387A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0690144B1 (en) * | 1994-06-27 | 2001-11-21 | Ebara Corporation | Method of forming carbide-base composite coatings, the composite coatings formed by that method, and members having thermally sprayed chromium carbide coatings |
| CN1405355A (en) * | 2001-08-04 | 2003-03-26 | 山东科技大学机械电子工程学院 | Method for depositing paint-coat of metal surface, especially for gradient paint-coat |
| CN102031516A (en) * | 2010-12-21 | 2011-04-27 | 上海工程技术大学 | Method for preparing Ni-based nano WC/Co composite coating with gradient function |
| CN104388887A (en) * | 2014-11-20 | 2015-03-04 | 西安交通大学 | Composite gradient coating on surface of heavy load gear and method for preparing composite gradient coating on surface of heavy load gear |
| CN105689643A (en) * | 2016-01-27 | 2016-06-22 | 北京科技大学 | Fast casting preparation method for steel-based abrasion-resistant and corrosion-resistant coating based on 3D printing |
| CN107267909A (en) * | 2017-06-23 | 2017-10-20 | 燕山大学 | A kind of plasma spray Ni bases WC/TiC/LaAlO3Wear-resistant coating |
| CN109023361A (en) * | 2018-07-02 | 2018-12-18 | 东南大学 | gradient coating cutter and preparation method thereof |
| CN209112928U (en) * | 2018-11-23 | 2019-07-16 | 洛阳骄一新材料科技有限公司 | A kind of low-friction coefficient Scraper Conveyer Middle Trough wear-resistant middle plate |
-
2020
- 2020-04-21 CN CN202010314585.XA patent/CN111498387A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0690144B1 (en) * | 1994-06-27 | 2001-11-21 | Ebara Corporation | Method of forming carbide-base composite coatings, the composite coatings formed by that method, and members having thermally sprayed chromium carbide coatings |
| CN1405355A (en) * | 2001-08-04 | 2003-03-26 | 山东科技大学机械电子工程学院 | Method for depositing paint-coat of metal surface, especially for gradient paint-coat |
| CN102031516A (en) * | 2010-12-21 | 2011-04-27 | 上海工程技术大学 | Method for preparing Ni-based nano WC/Co composite coating with gradient function |
| CN104388887A (en) * | 2014-11-20 | 2015-03-04 | 西安交通大学 | Composite gradient coating on surface of heavy load gear and method for preparing composite gradient coating on surface of heavy load gear |
| CN105689643A (en) * | 2016-01-27 | 2016-06-22 | 北京科技大学 | Fast casting preparation method for steel-based abrasion-resistant and corrosion-resistant coating based on 3D printing |
| CN107267909A (en) * | 2017-06-23 | 2017-10-20 | 燕山大学 | A kind of plasma spray Ni bases WC/TiC/LaAlO3Wear-resistant coating |
| CN109023361A (en) * | 2018-07-02 | 2018-12-18 | 东南大学 | gradient coating cutter and preparation method thereof |
| CN209112928U (en) * | 2018-11-23 | 2019-07-16 | 洛阳骄一新材料科技有限公司 | A kind of low-friction coefficient Scraper Conveyer Middle Trough wear-resistant middle plate |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104162676B (en) | A kind of fracturing pump valve body, valve seat vacuum cladding surface reinforcing method | |
| CN110699629A (en) | High-entropy amorphous powder with high-temperature erosion resistance and plasma spraying function, coating of high-entropy amorphous powder, preparation method of coating and application of coating | |
| CN1339616A (en) | Coating method for wear resistank composite coating on steel base surface | |
| CN109576603B (en) | Functional layer alloy powder and method for repairing pinch roll of finish rolling descaling box through laser cladding | |
| CN100510310C (en) | Method for preparing self lubricating nickel base alloy spray welding oil pumping rod collar | |
| CN107338434A (en) | Wear-resisting composite coating of the spontaneous high-temperature self-lubrication of Laser Cladding in-situ and preparation method thereof | |
| CN111498387A (en) | Wear-resistant and corrosion-resistant gradient coating for middle groove of scraper conveyor | |
| CN109913868A (en) | A kind of hole array steel surface composite coating and preparation method thereof | |
| CN111411356A (en) | Preparation method of wear-resistant and corrosion-resistant gradient coating for middle groove of scraper conveyor | |
| CN109182946B (en) | Composition of wear-resistant, corrosion-resistant and medium-high temperature-resistant coating for hydraulic hoist piston rod, coating and preparation method of coating | |
| CN109338266A (en) | A kind of wear resistant self-lubricating coating and preparation method | |
| CN110923696A (en) | Laser cladding nickel-based material for surface of ball valve and additive manufacturing process thereof | |
| CN1900523A (en) | Oil pump plunger | |
| CN110684942B (en) | Wear-resistant arc spraying powder core wire material and coating preparation method | |
| CN109797358A (en) | A kind of preparation method of ceramic base self-lubricating composite coating | |
| CN111593345B (en) | Composite powder and preparation method thereof, and anti-contact fatigue coating and preparation method thereof | |
| Dallaire et al. | Abrasion wear resistance of arc-sprayed stainless steel and composite stainless steel coatings | |
| CN112359354A (en) | Method for strengthening pump sealing part through laser cladding | |
| CN201582429U (en) | Self-cleaning ball valve | |
| CN111270233A (en) | Method for strengthening retaining ring of superhard wear-resistant slurry pump | |
| CN101021007A (en) | Self-lubricating spray welding iron-base alloy powder for sucker rod coupling | |
| CN109628927A (en) | A kind of wear-resistant corrosion-resistant nickel-base silicon carbide compound coating and preparation method thereof for marine worker liquid presses piston pole | |
| CN208619834U (en) | A kind of Wear-resistant ceramic slag removal valve | |
| CN113564574B (en) | Nickel-coated graphite enhanced wear-resistant antifriction corrosion-resistant ceramic coating material, coating, and preparation method and application thereof | |
| CN117778927A (en) | Composite coating material of drier coil and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200807 |