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Gray cast iron parts or components for machines having a basic microstructure consisting of troostite and methods for their manufacture

A basic structure, troostite technology, applied in the field of manufacturing such parts or components, large machine parts or components, can solve the problems that cannot be considered after the upgrade, etc., to achieve favorable tribological properties, improve bearing capacity, and good machinability sexual effect

Active Publication Date: 2015-09-16
MAN DIESEL & TURBO FILIAL AF MAN DIESEL & TURBO SE TYSKLAND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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Method used

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  • Gray cast iron parts or components for machines having a basic microstructure consisting of troostite and methods for their manufacture
  • Gray cast iron parts or components for machines having a basic microstructure consisting of troostite and methods for their manufacture

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Embodiment Construction

[0037] The main field of application of the invention is the larger parts or components of machines, in particular engines, preferably large engines, here in particular the components delimiting the combustion chambers of such engines, such as cylinder liners, pistons, piston rings, etc., which They are subjected to high pressure and temperature loads during operation. Larger components or components of the type referred to here are found, for example, in large two-stroke engines with direct-flow scavenging. Large engines include, for example, engines with a cylinder bore diameter of at least 200 mm.

[0038] figure 1 Cylinder liner 1 based on a large engine, such as a two-stroke large engine. Such a cylinder liner 1 has a cylindrical housing which is provided with an integrally formed air inlet, as is usual in two-stroke engines, and has a flange arranged at the upper end for receiving the cylinder head. The wall thickness a is greater in the region of the flange than in t...

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Abstract

In a part or component for machines, in particular large-scale machines, which consists of grey cast iron with graphite embedded in a basic microstructure, it is possible to achieve a high load-bearing capacity and also good machining properties and good tribological properties by virtue of the fact that finely lamellar troostite is formed as the matrix material, in which the graphite is incorporated in lamellar form, by controlled cooling according to a predefined temperature-time correlation with a normalizing process at 850-900°C, subsequent rapid cooling down to about 400°C and subsequent, relatively slow residual cooling.

Description

technical field [0001] The invention relates to a part or component for a machine, in particular a large machine, consisting of a cast iron material containing graphite embedded in the basic structure. Another concept of the invention relates to a method for producing such a component or component. [0002] In the context of this application, a component means a finished part which is ready to be installed and to perform its function. In the context of this application, a component means a semi-finished product or a simpler primary product, such as a cast blank, pressed blank, etc., from which one or more components can be produced. Of course, the above definitions can be used flexibly within a certain range within the scope of this application. Background technique [0003] The power of the machines became higher and higher in the process of development. Therefore, the requirements for the load-carrying capacity of the machine components are also increased. For example,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C37/00C21D5/00
CPCC22C37/00C21D5/00
Inventor L·莫丘尔斯基P·穆尔森
Owner MAN DIESEL & TURBO FILIAL AF MAN DIESEL & TURBO SE TYSKLAND