淬火、回火、退火、正火用英文怎样定义?

将其定义用英语来定义

1、淬火:quenching

读音:英[ˈkwentʃɪŋ],美[ˈkwentʃɪŋ]

释义:将金属工件加热到某一适当温度并保持一段时间,随即浸入淬冷介质中快速冷却的金属热处理工艺

2、回火:tempering

读音:英[ˈtempərɪŋ],美[ˈtempərɪŋ]

释义:将经过淬火的工件重新加热到低于下临界温度Ac1(加热时珠光体向奥氏体转变的开始温度)的适当温度,保温一段时间后在空气或水、油等介质中冷却的金属热处理工艺。

3、退火:annealing

读音:英[əˈniːlɪŋ],美[əˈniːlɪŋ]

释义:将工件加热到适当温度,根据材料和工件尺寸采用不同的保温时间,然后进行缓慢冷却,目的是使金属内部组织达到或接近平衡状态,获得良好的工艺性能和使用性能,或者为进一步淬火作组织准备。

4、正火:normalized

读音:英[ˈnɔːməlaɪzd],美[ˈnɔːrməlaɪzd]

释义:正火的目的在于消除钢板在轧制过程中因工艺或其他问题所产生的偏析现象;袭去除材料的内应力;降低材料的硬度。



扩展资料

金属热处理是机械制造中的重要工艺之一,与其他加工工艺相比,热处理一般不改变工件的形状和整体的化学成分,而是通过改变工件内部的显微组织,或改变工件表面的化学成分,赋予或改善工件的使用性能。其特点是改善工件的内在质量,而这一般不是肉眼所能看到的。

退火、正火、淬火、回火是整体热处理中的“四把火”,其中的淬火与回火关系密切,常常配合使用,缺一不可。“四把火”随着加热温度和冷却方式的不同,又演变出不同的热处理工艺。

热处理是机械零件和工模具制造过程中的重要工序之一。大体来说,它可以保证和提高工件的各种性能 ,如耐磨、耐腐蚀等。还可以改善毛坯的组织和应力状态,以利于进行各种冷、热加工。

例如白口铸铁经过长时间退火处理可以获得可锻铸铁,提高塑性 ;齿轮采用正确的热处理工艺,使用寿命可以比不经热处理的齿轮成倍或几十倍地提高;另外,价廉的碳钢通过渗入某些合金元素就具有某些价昂的合金钢性能,可以代替某些耐热钢、不锈钢;工模具则几乎全部需要经过热处理方可使用。

温馨提示:答案为网友推荐,仅供参考
第1个回答  2015-02-28
淬火 quenching
回火 tempering
退火 annealing
正火 normalizing本回答被网友采纳
第2个回答  推荐于2017-09-07
Quench hardening is a mechanical process in which steel and cast iron alloys are strengthened and hardened. These metals consist of ferrous metals and alloys. This is done by heating the material to a certain temperature, dependent upon material, and then rapidly cooling the material. This produces a harder material by either surface hardening or through-hardening varying on the rate at which the material is cooled. The material is then often tempered to reduce the brittleness that may increase from the quench hardening process. Items that may be quenched include gears, shafts, and wear blocks.

Tempering is a heat treatment technique applied to ferrous alloys, such as steel or cast iron, to achieve greater toughness by decreasing the hardness of the alloy. The reduction in hardness is usually accompanied by an increase in ductility, thereby decreasing the brittleness of the metal. Tempering is usually performed after quenching, which is rapid cooling of the metal to put it in its hardest state.
Annealing , a heat treatment that alters the microstructure of a material causing changes in properties such as strength, hardness, and ductility
Normalization is an annealing process in which a metal is cooled in air after heating in order to relieve stress.本回答被网友采纳
第3个回答  2020-12-18

正火、退火、淬火、回火,到底是什么意思呢?你都搞清楚了吗

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