Wear-resistant chain
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United States of America Patent
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Jan 13, 2015
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app pub date -
Mar 29, 2007
filing date -
Mar 29, 2007
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Abstract
There is provided a wear-resistant chain having a high durability even in severe use environments such as those of a timing chain of an engine even though it is highly efficient and productive. A miniaturizing agent containing silicon is doped in a vanadium cementation process of a base material of steel. Vanadium carbide forming a surface-hardened layer contains a secondary phase composed of an amorphous structure containing silicon within crystal grains and a crystal grain size of the vanadium carbide is miniaturized to 1 μm or less.
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