Учеба и наука
Task #1 Read the text and answer the questions METALWORKING Metals are important in industry because they can be easily deformed into useful - вопрос №1873853
shapes. A lot of metalworking processes have been developed for certain applications. They can be divided into five broad groups: 1. rolling, 2. extrusion, 3. drawing, 4. forging, 5. sheet-metal forming. During the first four processes metal is subjected to large amounts of strain (deformation). But if deformation goes at a high temperature, the metal will recrystallize — that is, new strain-free grains will grow instead of deformed grains. For this reason metals are usually rolled, extruded, drawn, or forged above their recrystallization temperature. This is called hot working. Under these conditions there is no limit to the compressive plastic strain to which the metal can be subjected. Other processes are performed below the recrystalli-zation temperature. These are called cold working. Cold working hardens metal and makes the part stronger. However, there is a limit to the strain before a cold part cracks. Rolling Rolling is the most common metalworking process.
март 10, 2016 г.
-
Всего ответов: 1
-
1. Metals are important for industry because they can be easily deformed into useful shapes.
2. The main metalworking processes are rolling, extrusion, drawing, forging, sheet-metal forming.
3. Metals are worked mostly hot because new strain-free grains will gwow instead of deformed grains.
4. Cool working gives such properties as hardening metals and making the part stronger
5. Rolling is the most common metalworking process which is used during the work with aluminium, steel and copper
6. Extraction is pushing a billet to flow through the orifice of a die.
7. The type of extraction is back extraction
Похожие вопросы
Решено
мини сочинения 7-10 предложений не больше на английском
Вопрос задан анонимно декабрь 14, 2012 г.
You have decided to join an online penfriend club. Write an email of 50-80 words to the club in which you: • describe yourself • write about your
февраль 21, 2016 г.
Решено
Помогите, пожалуйста, перевести или найти перевод текста. Нужно очень срочно.
апрель 7, 2014 г.
Решено
Помогите создать рекламу какого-либо товара на английском языке, нужен слоган, адрес, телефоны. Начинать нужно со слов: "Я хочу представить...Покупайте этот товар, потому что он..."
декабрь 4, 2014 г.
Work in groups.Organise an eco-helper group.Write a list of activities for the group for next weekend
апрель 12, 2015 г.