The Essay of “English for Professional Engineers”(专业英语写作).docxVIP

The Essay of “English for Professional Engineers” ---Materials forming and Control Engineering My Title: Forging in My Mind Teacher： Professional : Materials Forming and Control Engineering Name : Class : 1004 Student ID : Date :2012-10-31 Forging in my mind Abstract： Forging is a methods of forming and it is the oldest of metalworking arts. Now in the manufacturing industry is also a common manufacturing process. Forging is a use of forging machinery to metal blank pressure, then let the materials plastic deformation. By the means of Forging can Eliminate metal in the smelting process of casting defects such as loose state, and it we can gain a better Mechanical properties than others casting. Related machinery high load working conditions, severe important parts ,in addition to shape a simple available rolled plate, material or weldments outside, use more forgings. Introduction ： The professional----Materials Forming and Control Engineering. Before I learn the English for Professional Engineers ,I know some knowledge about the professional. Just like materials 、heat treatment process、functions、performance and so on . Because we learnt “Engineering materials ”、“Engineering training ”、“Mechanical design technology foundation ”and so on . All of those subjects involves the forging . I know more about it by learning the professional English . Like “the changing of China’s steel trade :a course for concern” 、“the history of rolling ”、“metal casting processes ”、“cast alloys”、“forging”、“Methods of welding” and so on。 Today，in this passage，I will talk some knowledge I learnt in the book of professional English .The main topic is “forging in my mind ” . Body: Through the inquires the material, we can know the beginning of the steel recrystallization temperature is about 727 ℃, but generally adopts 800 ℃ as division line, higher than 800 ℃ is hot forging, In 300 ~ 800 ℃ between c