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High temperature erosion endurable work piece, reciprocating piston internal combustion engine having the same and use of alloy for protection against erosion of high temperature

A high-temperature corrosion and workpiece technology, applied in the direction of pistons, piston rings, mechanical equipment, etc., can solve problems such as inability to protect, expensive materials, and complicated manufacturing

Inactive Publication Date: 2011-06-08
WAERTSILAE SCHWEIZ AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thus, for example, the materials used to form the known surface coatings are relatively expensive because, on the one hand, they consist of a plurality of relatively expensive base substances and, on the other hand, their production is relatively complicated, for example in the case of thermal spraying
Known protective layers are always already optimized with respect to certain corrosion processes, so the specific surface protection is always ultimately a compromise so that hot corrosion is minimized, but ultimately does not protect as much as needed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] In a first embodiment of the workpiece according to the invention, the hot corrosion-resistant alloy comprises at most 95% by weight of Ni, in particular 10% by weight to 80% by weight of Ni, especially 70% by weight of Ni, the rest except Apart from impurities, it consists of copper.

[0024] In this structure, the high temperature corrosion resistant alloy comprises in another instance up to 95% by weight Cu, especially 10% to 80% by weight Cu, especially 70% by weight Cu, the remainder of which Apart from impurities, it consists of nickel.

[0025] Through a specific selection of the proportions of Cu and / or Ni, the high-temperature corrosion resistance of the workpiece according to the invention can be optimized according to requirements.

[0026] In this respect, the cutting volume of the anti-corrosion coating and the workpiece itself are both easily obtained quantities, so that the protective effect of various coatings can be compared quantitatively and qualitat...

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Abstract

The invention relates to a workpiece with resistance against high temperature corrosion, in which one surface of the workpiece has a protective coating against high temperature corrosion, and is formed of an alloy consisting of Cu and Ni except impurities. The invention also relates to the application of the alloy for protecting the workpiece from the high-temperature corrosion.

Description

technical field [0001] In each category, according to the preambles of the independent claims, the invention relates to a workpiece resistant to high-temperature corrosion, a reciprocating piston internal combustion engine with high-temperature corrosion protection, in particular a two-stroke large diesel engine, a turbine, an incinerator, and The use of an alloy to protect workpieces from high temperature corrosion. Background technique [0002] Protective layers that are resistant to high-temperature corrosion (which is often also referred to simply as hot corrosion or hot gas corrosion) are well known in the prior art. These are also understood to mean surface protection layers which, for example, provide high corrosion resistance, especially against oxidation or sulphurization at high temperatures and in chemically aggressive environments. They are produced, for example, by thermal spraying of MCrAlY layers which are widely used for high temperature corrosion resistance...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02F1/24F02F1/00C22C19/03C23C30/00F01N13/16F02F5/00F02F3/00C22C9/06F02B39/00
CPCF05C2201/0484C23C30/00C23C4/06F02B77/02F02B77/04C22C19/03
Inventor D·施拉格尔
Owner WAERTSILAE SCHWEIZ AG