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High temperature alloy for casting engine valves

A high-temperature alloy, solidification temperature technology, applied in the direction of engine components, machines/engines, lift valves, etc., can solve problems such as precipitation

Pending Publication Date: 2018-07-03
CATERPILLAR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the alloy composition disclosed in the '465 patent may be prone to precipitation of M at high temperature 6 C carbide

Method used

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  • High temperature alloy for casting engine valves
  • High temperature alloy for casting engine valves
  • High temperature alloy for casting engine valves

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Experimental program
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Embodiment Construction

[0012] figure 1 An exemplary cross-section of internal combustion engine 10 is shown. Engine 10 may be any type of engine, for example, a two-stroke or four-stroke diesel or gasoline engine, a two-stroke or four-stroke gas fueled engine, or a two-stroke or four-stroke dual-stroke fuel powered engine. Engine 10 may be a compression ignition engine or a spark ignition engine. Engine 10 may include, among other things, an engine block 12 at least partially defining cylinders 14 . Although in figure 1 Only one cylinder 14 is shown, but it is contemplated that the engine 10 may include any number of cylinders 14 . Also, cylinders 14 in engine 10 may be arranged in an "axial" configuration, a "V" configuration, an opposed piston configuration, or in any other suitable configuration.

[0013] A piston 16 may be slidably disposed within the cylinder 14 . A cylinder head 18 may be connected to engine block 12 to enclose one end of cylinder 14 . Piston 16 , together with cylinder ...

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PUM

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Abstract

A high temperature alloy is disclosed. The high temperature alloy may have on a weight basis: about 9.0-10.0 weight % of Co, about 0.25 weight % maximum of Fe, about 8.0-9.0 weight % of Cr, about 4.75-5.50 weight % of Al, about 1.0-1.5 weight % of Ti, about 0-2.0 weight % of Mo, about 6.0-9.0 weight %, of W, about 0.12-0.18 weight % of C, about 0.01-0.03 weight % of Zr, about 0.005-0.015 weight %of B, about 0.5-1.5 weight % of Ta, a balance of Ni, and incidental impurities.

Description

technical field [0001] The present invention relates generally to superalloys, and more particularly to superalloys for casting engine valves. Background technique [0002] Internal combustion engines typically include one or more valves that allow fresh air to enter the engine's combustion chamber and / or allow exhaust gases to exit the combustion chamber. These engine valves, especially the exhaust valves, are subjected to very high temperatures during engine operation. For example, valves may often reach temperatures of 800°C or higher (eg, 800-850°C) due to the heat released from combustion of fuel within the combustion chamber, although only a small fraction of the overall engine life. Conventional materials used to manufacture engine valves can withstand such high temperatures for relatively short periods of time, eg, up to 2000 hours, after which the engine valves may require repair or replacement. However, performing such maintenance on the engine valves requires ta...

Claims

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Application Information

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IPC IPC(8): C22C19/05F16K51/00
CPCC22C19/057F16K51/00C22C19/056F01L3/00F01L3/02F01L3/20
Inventor M·D·维利兹C·邱T·J·雅尼亚克
Owner CATERPILLAR INC