英语第六课汇总

焊接技术的应用如此广泛，以至于现在
都很难定义“焊接”了。原先，焊接被定义 为“通过熔融连接金属”，也就是说，通过 熔化，但这种定义已不再适用。尽管熔融法 仍然是最普通的，却并非总被采用。焊接随 后被定义为“借助热量将金属连接”，现在 这个定义也不完善。不仅金属可以焊接，很 多塑料也可以。尤其是很多焊接方法并不需 要热量。
每个机械工人都对无热焊接很熟悉。冷压焊接 在某些情况下是很合适的生产焊接方法。除压 力焊接外，我们还可以用声波甚至激光来焊接。 面对历年创造的多样化焊接方法，我们必须在 这里采用下述焊接定义：“焊接是金属和塑料 不采用紧固件联接的方法”。
Biblioteka Baidu
There is no uniform method of naming welding processes. Many processes are named according to the heat source or shielding method, but certain specialized processes are named after the type of joint produced. Examples are spot and butt welding. An overall classification can not take account of this because the same type of joint may be produced by a variety of processes. Spot welding may be done by electric resistance, arc, or electron-beam processes and butt welding by resistance, flash or any of a number of other methods.
等离子体，血浆 industrial applications of plasma. 等离子体的工业应用
Welding techniques have become so versatile that it is difficult nowadays to define “ Welding”. Formerly welding was “the joining of metals by fusion, ”that is, by melting, but this definition will no longer do. Even though fusion methods are still the most common, they are not always used. Welding was next defined as the “joining of metals by heat,” but this is no longer a proper definition either. Not only metals can be welded. So can many of the plastic. Furthermore several welding methods do not require heat.
Every machinist is familiar with heatless welding.Cold pressure welding is a proper production welding method under some circumstances. Besides pressure welding,we can weld with sound and even with light from the famous laser. Faced with a diversit of welding methods that increase year by year, we must here adopt the following definition of welding: “Welding is the joining of metals and plastics by methods that do not employ fastening devices” .
Unit 6
welding
fusion [`fju:ʒən]
熔化，熔融 核聚变，热核反应； 联合, 合并 thermal fusion power generation 热核聚变发电 fusion formulae under high pressure 高压熔化方程
shield [ʃi:ld] 屏蔽，护罩，遮护 屏蔽，遮护，保护 保护人；保护物；掩护物；屏障 God is our shield. 神是我们的保护者。 His mother shield him from punishment. 他母亲保护了他，使他免受惩罚。
命名焊接没有一致的方法。许多焊接过程
根据热源和保护方法来命名，某些专门的焊接 过程按照形成的联接形式来命名，例如点焊和 对焊。总体的分类不可能考虑这一点，因为同 样的联接可以通过许多焊接过程产生。点焊可 借助电阻焊、电弧焊或电子束焊来完成，而对 焊可以借助电阻焊、闪光焊（火花对焊）或其 他多种方法中的一种来完成。
butt [bʌt] welding
对接焊 solder [`sɔdə] （低温）焊料 软钎焊，锡焊
solder these two pipes together. 把这两段管子焊接在一起。
bismuth [`bizməθ] 铋
cadmium [`kædmiəm] 镉 braze [breiz] 硬钎焊，铜焊
rivet [`rivit] 铆钉，铆接
oxy- acetylene[ə`setili:n] 氧乙炔
flux [flʌks] 焊剂，（电、磁、光、辐射）通量
cathode [`kæθəʊd] 阴极,负极
anode [`æn,əʊd] 阳极，正极
ionize [`aiənaiz] 电离，离子化
plasma [`plæzmə]