PPT-Heat Treatment of Metals

Heat Treatment Heating a metal or alloy to various definite temperatures holding these for various time durations and cooling at various rates Combination of controlled heating and cooling determine not only the nature and distribution of microconstituents which determine the properties of a metal or alloy but also the grain size . METAL CHEMISTRY. N4. CHEMISTRY. N5. CHEMISTRY. After completing this topic you should be able to : . OBTAINING METALS. State ores are naturally occurring compounds of . metals.. State . the less reactive metals, including gold, silver and copper, are found uncombined in the Earth’s crust and the more reactive metals have to be extracted from their ores. What makes up matter?. By Amelia. Atoms. : an atom is the smallest particle of an element. Atomic number. : the number of protons in a nucleus is the elements atomic number. Each element is made of one kind of atom, so elements are called pure substances . Heat Energy. Heat energy is due to the movement of atoms or molecules.. As atoms move faster they create more energy = causing Heat!. Thermal Energy. Depends upon the mass, temperature and phase of an object.. Unit 2. Materials technology. Which materials are widely used in engineering?. What is meant by recycling?. How does recycling affect engineering design?. Look at page 14. Do 1.1.. Complete 2.a. Look at the meaning of the following words:. Metals. In the Construction Industry we use metals in the many areas such as;. Structural. Claddings. Architectural Systems. Building Service. Metals. Metals that are commonly used in the Construction Industry are;. ASM, Metals Park, OH, pp.13-18Development of Machining Procedures to MinimizeD. Hornbach and P. Prev Lesson Objectives. Define vocabulary: luster, thermal conductivity, electrical conductivity, conductor, malleable, ductile, insulator, and brittle . Lesson Objectives. Classify a given element as metal, nonmetal, or metalloid based on its location or properties. What property did Mendeleev use to arrange his periodic table?. How many periods are in the periodic table and what information can you tell by an element’s period?. Where are the groups and what information do they give you about an element?. Solids. Crystalline Solids- have a regular repeating arrangement of their particles.. Salts, Sugars, Metals. Amorphous Solids- have no regular repeating arrangement of their molecules. Common glass, several polymers.. traitment. in France. . Service Produits et Efficacité Matière. Direction Economie Circulaire et Déchets. 20/02/14. 2. Panel heaters. Stoves. Ovens. Dishwashers. Panel heaters. Stoves. Ovens. Dishwashers. # of neutrons. # of electron. Atomic #. Mass #. Oxygen. 8. 8. 16. Silicon. Si. 14. 14. 28. Aluminum. Al. 14. 13. 13. Iron. 26. 56. Ca. 20. 20. 40. Bellwork: Wednesday 2/22/2012. 1- Turn in Pink . Bellwork. What is cryogenic heat treatment?. Cryogenic heat treatment is the ultra low temperature processing of materials to enhance their desired metallurgical and structural properties. The temperature is about -196°C or 77°K. ROLL # 28. WAHEED IKRAM. ROLL # 33. BSc(Hons) Food Science and Technology. 8. th. Semester (Regular). CONTENTS. Introduction. History. Why VHT system was developed. Principle of VHT. Three effective methods of VHT system. MATERIAL SCIENCE & METALLURGY. What is material science? What is metallurgy? Why this subject is studied? . Brief classification of engineering materials. Important properties of each category of engineering materials.