САМОСТІЙНА РОБОТА №13

Тема: Технічний переклад та переказ тексту за фахом: «Гаряча обробка сталі »

Завдання до самостійної роботи:

І. Письмово перекладіть текст.

«Heat treatment of steel

 

We can alter the characteristics of steel in various ways. In he first place ,steel which contains very little carbon will milder than steel which contains a higher percentage of carbon , up to the limit of about 1.5%.Secondly ,we can heat the steel, above a certain critical temperature and then allow it to cool at different rates. At this critical temperature , changes begin to take place in the molecular structure of the metal .In the process knowing as annealing we can heat the steel above the critical temperature and permit it to cool very slowly.This causes the metal to become softer than before, and much easier to machine .Annealing has a second advantage. It helps to relieve any internal stresses which exist in the metal. These stresses are liable to occur through hammering or working the metal or through rapid cooling .Metal which we cause to cool rapidly contracts more rapidly on the outside than on the inside.This produces unequal constructions , which may give rise to distortion or cracking . Metal which cools slowly is less liable to have internal stresses than metals which cool quickly.

On the other hand , we can make steel harder by rapid cooling. We heat it beyond the critical temperature and then quench it in water or some other liquid . The rapid temperature drop fixes the structural change in the steel which occurred at the critical temperature, and makes it very hard .But a bar of this hardened steel is more liable to fracture than normal steel. We therefore heat it again to a temperature below the critical temperature , and cool it slowly .This treatment I called tempering .It helps to relieve the internal stresses , and makes the steel less brittle than before . The properties of tempered steel enable us to use it in the manufacture of tools which need a fairly hard steel.High carbon steel is harder than tempered steel,but it much more difficult to work .

These heat treatments take place during the various shaping operations.

 

ІІ. Передивіться текст ще раз і дайте відповіді на такі запитання усно.

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ІІІ. Сумуйте інформацію тексту , заповнивши таблицю.

Назва процесу	Технологія процесу	переваги	недоліки
англ	укр	англ	укр	англ	укр	англ	укр
аnnealing quenching tempering

 

 

Питання для самоконтролю:

· What steel is on the first place?

· Where do changes take place ?

· What happened with metal cooling rapidly (slowly)?

 

Рекомендована література:

1. IBM PC для пользователя. – Краткий курс. – М.: ИНФА. – 1999

2. Гальперин И.Р., Медникова Э.М. Большой англо-русский политехнический словарь. – Москва: Русский язык, 1987.

3. Лоскутова Г.В. О компьютере по-английски. – Санкт-Питербург: КАРО. – 2004

4. Федоршин О.П., Євстіфєєв П.Ф., Рябушенко Т.Л.Англійська мова. Практикум з науково-технічного перекладу, – Тернопіль Навчальна книга – Богдан, 2002 – 52с.

5. Чебурашкин Н.Д. Хрестоматия по техническому переводу. – Москва: Просвещение, 1987.

Дидактичне забезпечення:текст, словник.