Vocabulary. pewter - пьютер, сплав олова со свинцом, сплав на оловянной основе

brass - латунь

pewter - пьютер, сплав олова со свинцом, сплав на оловянной основе

mixture - смесь

to melt - плавить

to cool - охлаждать

arsenic - мышьяк

ferrous alloys - сплавы черных металлов

non ferrous alloys - сплавы цветных металлов

valve - клапан

heat –resisting alloy - жаростойкий сплав

solder - припой

antifriction alloy - антифрикционный сплав

to be in common use - широко использоваться

engine - двигатель

lead - свинец

German silver - нейзильбер

cutlery – столовые приборы

Babbit - баббит

Brazing solders – твердый (тугоплавкий) припой

assembly -сборка

heat treatment – термообработка

Exercise 2. Answer the following questions.

1. How many alloys are in a common use today?

2. What nonmetals do alloys contain?

3. What is the reason for the preparation of different alloys?

4. How are alloys classified?

5. Where are alloys used?

Exercise 3. Put questions to the bold-typed words.

1. Around 30 metallic elements serve modern needs.

2. According to composition we have ferrous alloys and nonferrous alloys.

3. Alloys may contain carbon.

4. The nonferrous alloys are subdivided into the predominant or base metals.

5. Metallurgists at­tempt to regulate both physical and chemical properties of metals through the preparation of alloys.

6. Sizable amounts of certain metals are convertible into compounds of a great importance.

7. Some of the metals are used in automobile and aircraft engines.

Exercise 4. Give the equivalents for the following words and make up sentences with them: nonferrous alloy, ferrous alloy, base metal, modern, aircraft, lead, engine, stainless steel, mixture, to melt.

Exercise 5. Give the definitions for the following concepts: alloy, lead, ferrous alloy, nonferrous alloy, pewter, brass.

Exercise 6. Put the following words in the gaps: systematic, to form, ultraviolet radiation, hydrocarbons, butane, pentane, natural gas, halogens, soda lime, high-molecular.