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Method for coating a substrate with a spray material and functional layer achievable with this method

A technology of functional layer and friction power, applied in the field of coated substrates, can solve the problems that the diesel engine cannot reach the degree of benefit, and the functional layer does not reach the sufficient hardness of the diesel engine.

Active Publication Date: 2015-05-06
梅赛德斯-奔驰集团股份公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, practice has proved that the functional layer made by using the above method does not at least have sufficient hardness required for the coating of the working path of the diesel engine, and it cannot meet other tribological requirements to the extent that it is beneficial to the diesel engine.

Method used

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  • Method for coating a substrate with a spray material and functional layer achievable with this method

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Embodiment Construction

[0028] According to this embodiment, the functional layer is deposited using arc wire spraying (LDS). In arc wire spraying, two wires of spray material are fed into the applicator head. An electric arc is ignited between the lines of sprayed material. In this case, the linear spray material melts and is applied / coated in a targeted manner by the carrier gas onto the substrate to be coated, where it cools, solidifies and forms the functional layer.

[0029] The linear spraying material mainly includes iron-chromium alloy. The sprayed material is microalloyed in such a way, at least by means of carbon, that when the sprayed material cools, the majority of martensite is already formed, austenite is practically absent and only minor ferrite is present Proportion.

[0030] The composition of the functional layers derived from the characteristic parameters of the Scheffler diagram is as follows:

[0031] Creq=12.9 and Nieq=5.9

[0032] Here, the chromium equivalent is derived f...

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Abstract

The function layer comprises an iron based alloy having a martensitic structure, and alloy components indicated in characteristics consisting of nickel equivalent and chromium equivalent, where a Schaeffler diagram is based on the total weight of the chromium equivalent (greater than 10) and the nickel equivalent (less than 19). An independent claim is included for a method for coating a substrate.

Description

technical field [0001] The invention relates to a method for coating a substrate, in which a linear spray material is melted in an electric arc and deposited as a layer on the substrate. The invention also relates to a corrosion-resistant functional layer with sufficiently high hardness and better tribological properties, which can be produced by the method. Background technique [0002] In the manufacture of internal combustion engines, efforts are made to minimize friction and increase wear and wear resistance in order to increase energy efficiency and reduce emissions. For this purpose, motor components such as the cylinder bore and its walls are provided with a moving surface coating, or a bushing provided with a running surface is inserted into the cylinder bore. In most cases, thermal spraying, such as electric arc wire spraying, is used to apply such working surfaces. With arc wire spraying, an electric arc is created between two wires of sprayed material by applyin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/12B23K35/30B23K35/02C23C4/06
CPCB23K35/02B23K35/30C23C4/06B23K35/308B23K35/3086B23K35/0227B23K35/0261B32B15/01C22C38/02C22C38/04C22C38/44C22C38/48C22C38/50C23C4/067C23C4/131C22C38/58C23C4/08
Inventor E·A·奥兹丹尼兹R·竹斯W·汉森M·沃克U·阿凯
Owner 梅赛德斯-奔驰集团股份公司
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