英语翻译Engineering materialsTypes of materials Materials may be grouped inseveral ways.Scientists often classify materials by their stste:solid,liguid,or gas ,they also separate them into organic and inorganic materials.For industrial purposes ,

英语翻译Engineering materialsTypes of materials Materials may be grouped inseveral ways.Scientists often classify materials by their stste:solid,liguid,or gas ,they also separate them into organic and inorganic materials.For industrial purposes ,
英语翻译
Engineering materials
Types of materials
Materials may be grouped inseveral ways.Scientists often classify materials by their stste:solid,liguid,or gas ,they also separate them into organic and inorganic materials.
For industrial purposes ,materials are divided into engineering materials or nonengineering materials,engineering materials are those used in manufcture and become parts of products .nonengineering materials are the chemicals,fuels,lubricants,and other materials used in the manufacturing process which do not become part of the product .
This grouping is not exact.engineering materials may be further subdivided into:1.metals 2.polymers.3ceramics.a fourth type of material sometime listed is called a composite.materials in this group are made up of two or more materials from the engineering groups.each of the materials in a compositeretains its orignal characteristics.examples of composites include wood,concrete glass-reinforced polyester,and graphite polymer advanced composites.
Common metals
Pure metals are seldom used in common industrial products.pure copper is used in electrical applications,in automotive radiators,and gaskets.pure aluminum has applications in the chemical and electrical industries .however,most metals are alloys .there are over 25000 different iron-carbon alloys and over 200standard copper alloys including a number of brasses ,bronzes ,and nickel silvers.each of these alloys are identified by a code number.

英语翻译Engineering materialsTypes of materials Materials may be grouped inseveral ways.Scientists often classify materials by their stste:solid,liguid,or gas ,they also separate them into organic and inorganic materials.For industrial purposes ,
工程材料
材料的种类
材料分类有很多种方法：
科学家通常是根据它们的状态来：固体,液体和汽体,他们也被分为有机物和无机物两种.
作为工业用途,材料分为工程材料和非工程材料,工程材料就是那些用来生产产品的零件的材料,非工程材料就是化学品,燃料,润滑品和其他用于生产过程中但不是产品的一部分的材料.
这样分其实不太精确.
工程材料还可以分为：1.金属2.聚合物3.陶制品4.化合物、
第四种材料通常由两种或更多的工程材料组成的.化合物中的每种原材料还保留其原有的物性.例如化合物包含有木材,混凝土,玻璃纤维,涤纶和石墨等高级复合材料.
普通金属材料
纯金属很少用于普通的工业生产中.
纯铜主要用于电器设备,汽车引擎的冷却器和垫圈中.
纯铝在化学和电气工程中有应用.但是绝大多数金属是合金.有超过25000种铁碳合金和超过200种标准铜合金,包括青铜,黄铜,和镍黄铜.这些合金都有一个编号来区分他们.