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Název SŠ: SŠ-COPt Uherský Brod Autor: Ing. Hana Kubišová, Ph.D. Název prezentace (DUMu): Metallic Materials Název sady: Technical English for students of study branch Technician Gunsmith 2 nd, 3 rd and 4 th class Číslo projektu: CZ.1.07./1.5.00/34.0727 Datum vzniku: 17.1.2013 Uvedení autoři, není-li uvedeno jinak, jsou autory tohoto výukového materiálu a všech jeho částí. Tento projekt je spolufinancován ESF a státním rozpočtem ČR. 1
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Záměrem této sady výukových materiálů s názvem Technical English je ukázat žákům, kteří se v této oblasti vzdělávají, jaký byl vývoj zbraní. Jednotlivé DUMy (prezentace) v této sadě popíší postupně tematické oblasti, které jsou probírány v předmětu Anglický jazyk na naší SŠ. Konkrétně tato prezentace je zaměřena na kovové materiály. 2
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Do you know a geometrical characteristic of powder? Could you tell me the basic parts of the ball bullets? What is explosive? Which materials are used for production of explosives? What materials are not used for productin of explosives? 4
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Highlights from the most widely are technical alloys in which iron predominates. It is an alloy of iron with carbon and other elements. Divided into two groups : a wrought iron-iron with a carbon content of 2,14% a malleable iron-steel with a carbon content up to 2,14% 6
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Steels are divided into nine classes. Basic numeric steel grade is a five-digit number. Additional digits are separated from the basic numeric signs dot. 7
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Steel is an alloy of iron and carbon with max. 2.14% C and flanking elements like Mn, Si, P, S, Cu. Steels also contain alloying elements -Cr, W, Mo, V, Ni, etc. We classified steels according to: design and tooling, a chemical composition. 8
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Cast irons are alloys of iron and carbon, silicon, manganese and other elements. The amount of carbon in the alloy is greater than 2.14%. Cast iron also contains alloying elements. Grey cast iron is divided into alloyed and unalloyed. The numbers in the gray cast iron is composed of a six-digit number. The first two digits are 42, the second two digits is 24. 16
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A ductile iron is an important construction material. It is produced by adding magnesium. After casting graphite is eliminated in the form of pellets. The first two digits are 42, the second two digits is 23, third two digits indicates the value of the ultimate material. The ductile cast iron is used for casting the wall thickness from 5 to 100 mm. 17
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Malleable cast iron is tough and easily workable material. Malleable cast iron forms a transition between steel and gray cast iron. Malleable cast iron is produced by heat treatment of white cast iron. The first two digits are 42, the second two digits is 25, third two digits indicates the value of the ultimate material. Malleable cast iron is used for castings with wall thickness from 3 to 30 mm. 18
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Furthermore use the production: non-ferrous metals and their alloys, heavy non-ferrous metals and their alloys, light non-ferrous metals and their alloys, special alloys of non-ferrous metals, metal powders. 19
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What is steel? Do you know the classification of steel? What do you know about steel grade 10? What do you know about steel grade 11? What do you know about steel grade 12? What do you know about steel grade 13? Do you know the difference between steel grade 14 and steel grade 15? 21
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Steel is classified according to design and tooling, a chemical composition. Basic numeric steel grade is five-digit number. Additional digits are separated from the basic numeric signs dot. The highest quality of steel grades are 17,18,19. 23
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Class 10 has got the lowest quality. The production also use iron alloys and cast iron. We cast gray, ductile and malleable. The first two digits of the cast iron is 42. 24
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KŘÍBEK, J. Střelné zbraně I. část, 2. vyd. Brno: PC- DIR spol. s.r.o., 1995. 26
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