CN113454260A - Material composition combination for coating of component of internal combustion engine - Google Patents

Material composition combination for coating of component of internal combustion engine Download PDF

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Publication number
CN113454260A
CN113454260A CN201980083523.8A CN201980083523A CN113454260A CN 113454260 A CN113454260 A CN 113454260A CN 201980083523 A CN201980083523 A CN 201980083523A CN 113454260 A CN113454260 A CN 113454260A
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Prior art keywords
component
coating
wire
combination
rest
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Pending
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CN201980083523.8A
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Chinese (zh)
Inventor
W·汉克
L·施拉姆
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KS Kolbenschmidt GmbH
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KS Kolbenschmidt GmbH
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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
    • C23C30/00—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/36—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.7% by weight of carbon
    • 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
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/02—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic 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
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/02—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material
    • C23C28/021—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material including at least one metal alloy layer
    • 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
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
    • 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
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
    • C23C4/06—Metallic 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
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
    • C23C4/06—Metallic material
    • C23C4/08—Metallic material containing only metal elements
    • 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
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
    • C23C4/129—Flame spraying
    • 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
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
    • C23C4/131—Wire arc spraying
    • 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
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
    • C23C4/134—Plasma spraying

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Abstract

A material composition combination for a coating of a component of an internal combustion engine, said material composition combination being selected from one of three material composition combinations given in the following table: carbon (C) Manganese oxide Chromium (III) Boron Silicon Iron First variant 0.1‑5％ 0.1‑3％ 0‑2％ 0.0‑1％ The rest(s) Second variant 0.1‑5％ 0.1‑3％ 1‑13％ 0.1‑10％ The rest(s) Third variant 0.1‑5％ 0.1‑3％ 8‑30％ 0.1‑10％ The rest(s)

Description

Material composition combination for coating of component of internal combustion engine
Technical Field
The invention relates to a material composition combination for producing a component for an internal combustion engine, in particular for a coating of a cylinder surface and/or a piston surface, according to the features of the preambles of the independent claims.
Background
The coating for components of an internal combustion engine, in particular for cylinder surfaces and/or piston surfaces, is suitable, for example, as a corrosion-resistant and wear-resistant cylinder surface for low friction in internal combustion engines. The corrosion-resistant and wear-resistant cylinder surfaces for low friction in internal combustion engines are in turn particularly suitable for use in diesel engines.
There is a need for: for diesel engines above euro 6, transitional friction is reduced in order to obtain lower fuel consumption and to improve wear and corrosion resistance against exhaust gas recirculation condensates and poor fuel condensates.
It is known from the prior art to apply a plasma coating of powders with different chromium, molybdenum and solids contents to components for internal combustion engines. Such a plasma coating is applied, for example, to a cylinder made of stainless steel.
Disclosure of Invention
It is therefore an object of the present invention to provide an improved corrosion-resistant and wear-resistant cylinder surface for low friction in internal combustion engines.
According to the invention, this object is achieved by a respective one of the three material component combinations given in the table below.
Figure BDA0003118502080000011
Figure BDA0003118502080000021
The parameters in the second column of the above table give preferred values for the components used for the respective material component combination. In the first variant, therefore, 0.8% of carbon can be selected, preferably from the range of between 0.1% and 5% of carbon. The same applies to the other two variants. Alternatively, the first variant may also contain 0.1 to 10% of boron, and the second and/or third variants, independently of one another, contain 0.0 to 5%, preferably 0.0 to 1%, of silicon.
In a preferred embodiment, the material component combination can therefore have one of the following material component combinations:
the first variant is as follows:
carbon (C) Manganese oxide Chromium (III) Boron Silicon Iron
0.8％ 0.1-3％ 0-2％ Optionally 0.1-10% 0.0-1％ The rest(s)
The second variant is as follows:
carbon (C) Manganese oxide Chromium (III) Boron Silicon Iron
0.1-5％ 0.1-3％ 9％ 0.1-10％ Optionally 0.1-5% The rest(s)
The third variant:
carbon (C) Manganese oxide Chromium (III) Boron Silicon Iron
0.1-5％ 0.1-3％ 18％ 0.1-10％ Optionally 0.1-5% The rest(s)
The material composition combination according to the invention can be used as a coating on components of an internal combustion engine (in this case in particular a diesel engine). The components of the internal combustion engine are in particular the cylinder running surfaces, the pistons or the intake and exhaust ports in the cylinder head. The cylinder face may be honed (i.e., smooth) or roughened prior to application of the coating with the combination of material compositions according to the present invention.
The chromium content increases the wear and corrosion resistance of the coating. The coating according to the invention results in improved exhaust characteristics and in reduced fuel consumption.
The material component combination according to the invention is preferably fed to the coating process in the form of a wire. Without excluding other embodiments.
Preferably, the coating (in particular in the form of a wire) is applied to the component by means of a "wire plasma arc spraying" (PTWA) process.
For example, the material components present as wire rods can be combined and applied to components of an internal combustion engine (in particular cylinder faces) using a wire spraying process, for example a PTWA, using alloyed solid wires or solid-filled filler wires and optionally smooth honing.
Detailed Description
For example, PTWA internal coating systems are suitable for coating cylinder running surfaces. The PTWA (Plasma Transferred Wire Arc) coating system is a device for coating holes having a diameter of 65 to 350 mm. In this case, the spray additive is fed in a wire shape. The nozzle unit may comprise a thorium-doped tungsten cathode, a gas-cooled pilot nozzle made of copper, and a conductive, wire-like additive material which is fed perpendicularly to the pilot nozzle. The plasma gas (mixture of hydrogen and argon) is fed through a hole tangential to the periphery provided in the cathode holder. Due to the position of the cylinder bore, a gas flow is generated which twists along the cathode and escapes through the nozzle at a high speed. The process begins with a high voltage discharge that ionizes and dissociates the plasma gas between the pilot nozzle and the cathode. The plasma thus generated flows through the nozzle opening at high velocity and extends along the longitudinal axis of the nozzle. Here, the plasma is transported to add material to the wire continuously fed perpendicular to the nozzle, thereby closing the circuit. In this case, the melting and atomization of the wire is influenced in a dual manner. On the one hand, the wire is resistance-heated by a large current intensity, for example at 65 to 90 amperes. The plasma impinges on the preheated wire causing the wire to melt and atomize.
Devices for thermally coating surfaces are described, for example, in US 6,372,298B 1, US 6,706,993B 1 and WO2010/112567 a 1. The devices mentioned there all have: a wire input device for inputting a molten wire, wherein the wire functions as an electrode; a source of plasma gas for generating a plasma gas flow; a nozzle body having a nozzle opening through which a plasma gas stream is directed as a plasma gas jet onto the wire end; and a second electrode disposed in the plasma gas stream prior to the plasma gas stream entering the nozzle opening. US 6,610,959B 2 and WO2012/95371 a1 are also directed to such devices.
An arc is formed between the two electrodes through the nozzle opening. The plasma jet emerging from the nozzle opening impinges on the wire end and there causes melting of the wire with the arc and transports the molten wire material in the direction of the surface to be coated. A secondary air nozzle is mounted annularly around the nozzle opening, by means of which a secondary gas jet is generated which impinges on the material melted from the wire end and thus causes an acceleration of the transport in the direction of the surface to be coated and a secondary atomization of the melted wire material.
Modern internal combustion engines or motor blocks of internal combustion engines can be cast from metal or light metal, for example aluminum, wherein in particular the aluminum block has an iron or metal layer on its cylinder bore.
The coating according to the invention is suitable in particular for components cast from metal or light metal. In particular, these components can be made of an aluminum alloy, which has a metal layer, on which a coating made of the material composition combination according to the invention is then applied. The component can be cast, for example, from an aluminum alloy having an iron layer onto which the coating is applied.
The metal layer may be thermally sprayed onto the component. As the thermal spraying process, in addition to a two-wire arc spraying process (TWA), a high velocity flame (HVOF) spraying process, and a plasma powder spraying process, the above-described processes are known as a plasma wire spraying process or as a PTWA (wire plasma arc spraying). Coating the cylinder bore by means of an ion wire spraying process, i.e. by means of PTWA, is advantageous, since the following coatings can be produced: the coating has a positive effect on reducing the wear factor and increasing the service life of the internal combustion engine at lower oil consumption compared to conventional lining with a lining cast from grey cast iron material.

Claims (12)

1. A material composition combination for a coating of a component of an internal combustion engine, said material composition combination being selected from one of three material composition combinations given in the following table:
carbon (C) Manganese oxide Chromium (III) Boron Silicon Iron First variant 0.1-5％ 0.1-3％ 0-2％ 0.0-1％ The rest(s) Second variant 0.1-5％ 0.1-3％ 1-13％ 0.1-10％ The rest(s) Third variant 0.1-5％ 0.1-3％ 8-30％ 0.1-10％ The rest(s)
2. The material component combination of claim 1, wherein the material component combination is:
carbon (C) Manganese oxide Chromium (III) Boron Silicon Iron 0.8％ 0.1-3％ 0-2％ Optionally 0.1-10% 0.0-1％ The rest(s)
3. The material component combination of claim 1, wherein the material component combination is:
carbon (C) Manganese oxide Chromium (III) Boron Silicon Iron 0.1-5％ 0.1-3％ 9％ 0.1-10％ Optionally 0.1-5% The rest(s)
4. The material component combination of claim 1, wherein the material component combination is:
carbon (C) Manganese oxide Chromium (III) Boron Silicon Iron 0.1-5％ 0.1-3％ 18％ 0.1-10％ Optionally 0.1-5% The rest(s)
5. Use of the material composition combination according to one of claims 1 to 4 as a coating on a component of an internal combustion engine.
6. Use according to claim 5, wherein the coating is applied to the component by means of a "wire plasma arc spraying" (PTWA) process.
7. Use according to claim 6, wherein the material composition combination is fed to a "wire plasma arc spraying" (PTWA) process in the form of a wire.
8. Use according to one of claims 5 to 7, characterized in that the component is cast from metal or light metal.
9. Use according to one of claims 5 to 8, characterized in that the component is cast from an aluminium alloy having a metal layer onto which the coating is applied.
10. Use according to claim 9, wherein the component is cast from an aluminium alloy having an iron layer onto which the coating is applied.
11. Use according to claim 9 or 10, wherein the metal layer is thermally sprayed onto the component.
12. Use according to claim 11, wherein the metal layer is thermally sprayed onto the component by means of a two-wire arc spraying process (TWA), a high-speed flame spraying process, a plasma powder spraying process, a plasma wire spraying process or a wire plasma arc spraying (PTWA) process.
CN201980083523.8A 2018-11-20 2019-11-19 Material composition combination for coating of component of internal combustion engine Pending CN113454260A (en)

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DE102018129167.1 2018-11-20
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PCT/EP2019/081762 WO2020104438A1 (en) 2018-11-20 2019-11-19 Material composition for a coating for components of internal combustion engines

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CN102618785A (en) * 2012-02-13 2012-08-01 新兴铸管股份有限公司 Cr13 alloy composite coating material of metal pipe, and coating spraying method thereof
CN105568167A (en) * 2016-01-14 2016-05-11 北京工业大学 Coating material for thermal insulation protection and coating preparing method of coating material

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DE102019131181A1 (en) 2020-05-20
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Application publication date: 20210928