“case hardening”的概念、定义、翻译、参考文献-科学参考

case hardening

Physics

The hardening of the surface layer of steel, used for tools and certain mechanical components. The commonest method is to carburize the surface layer by heating the metal in a hydrocarbon or by dipping the red hot metal into molten sodium cyanide. Diffusion of nitrogen into the surface layer to form nitrides is also used.

Chemistry

The hardening of the surface layer of steel, used for tools and certain mechanical components. The commonest method is to carburize the surface layer by heating the metal in a hydrocarbon or by dipping the red hot metal into molten sodium cyanide. Diffusion of nitrogen into the surface layer to form nitrides is also used.

Chemical Engineering

1. The formation of a layer in a solid being dried that resists the passage of moisture movement from the interior to the surface. In a food dehydration process, or paint or varnish drying, the surface hardens while much of the interior remains soft.

2. The process of hardening the surface of steel that is used for tools and specialist purposes. It involves heating the steel in a hydrocarbon or by dipping the red-hot steel into molten sodium cyanide. A layer of nitrides can also be formed by the diffusion of nitrogen.

Geography

The production on a rock outcrop of a resistant weathering rind mostly made of iron and magnesium hydroxides; sometimes of amorphous silica. Case hardening in limestone occurs when the calcium carbonate dissolved at the surface is re-precipitated internally, most commonly close to the surface from which it was just dissolved (Donovan (2002) Geol. Today 18, 4). Case hardening may be related to the production of visors over some tafoni entrances. See R. Dorn (1998).

单词	case hardening
释义	case hardening Physics The hardening of the surface layer of steel, used for tools and certain mechanical components. The commonest method is to carburize the surface layer by heating the metal in a hydrocarbon or by dipping the red hot metal into molten sodium cyanide. Diffusion of nitrogen into the surface layer to form nitrides is also used. Chemistry The hardening of the surface layer of steel, used for tools and certain mechanical components. The commonest method is to carburize the surface layer by heating the metal in a hydrocarbon or by dipping the red hot metal into molten sodium cyanide. Diffusion of nitrogen into the surface layer to form nitrides is also used. Chemical Engineering 1. The formation of a layer in a solid being dried that resists the passage of moisture movement from the interior to the surface. In a food dehydration process, or paint or varnish drying, the surface hardens while much of the interior remains soft. 2. The process of hardening the surface of steel that is used for tools and specialist purposes. It involves heating the steel in a hydrocarbon or by dipping the red-hot steel into molten sodium cyanide. A layer of nitrides can also be formed by the diffusion of nitrogen. Geography The production on a rock outcrop of a resistant weathering rind mostly made of iron and magnesium hydroxides; sometimes of amorphous silica. Case hardening in limestone occurs when the calcium carbonate dissolved at the surface is re-precipitated internally, most commonly close to the surface from which it was just dissolved (Donovan (2002) Geol. Today 18, 4). Case hardening may be related to the production of visors over some tafoni entrances. See R. Dorn (1998).
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