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Questions and Answers
What do you mean by Ferrous and Non Ferrous metals?
What do you mean by Ferrous and Non Ferrous metals?
Ferrous metals contain iron and steel, while non-ferrous metals do not have iron or iron components.
What do you mean by Impact test of metal?
What do you mean by Impact test of metal?
Impact testing of metals is performed to determine the impact resistance or toughness of materials by calculating the amount of energy absorbed during fracture.
What do you meant by alloy. Give some examples.
What do you meant by alloy. Give some examples.
An alloy is a substance formed from the combination of two or more metals, or from combinations of metals and other elements. Examples include brass, bronze, and gun metal.
What is hardening of steel?
What is hardening of steel?
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What is vacuum hardening?
What is vacuum hardening?
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Write briefly about heat treatment of iron and steel.
Write briefly about heat treatment of iron and steel.
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Study Notes
Ferrous and Non-Ferrous Metals
- Ferrous metals contain iron and are known for their strength and durability, commonly used in construction and manufacturing.
- Non-ferrous metals do not contain significant amounts of iron, offering properties like corrosion resistance and lower weight, commonly used in aerospace and electronics.
- Examples of non-ferrous metals include aluminum, copper, zinc, and lead.
Impact Test of Metal
- An impact test measures a material's ability to absorb energy during fracture, indicating toughness.
- Typically involves striking a notched specimen with a pendulum hammer and measuring the energy absorbed before breaking.
- Common types include Charpy and Izod tests, which differ in specimen configuration and notch design.
Alloy
- An alloy is a mixture of two or more elements, one of which is a metal, which enhances specific properties like strength, corrosion resistance, and hardness.
- Examples of alloys include:
- Steel: Iron combined with carbon and other elements.
- Bronze: Copper mixed with tin, known for its hardness and corrosion resistance.
- Brass: Copper alloyed with zinc, offering good machinability and acoustic properties.
Hardening of Steel
- Hardening refers to a heat treatment process that enhances the hardness and strength of steel.
- Involves heating steel to a high temperature followed by rapid cooling (quenching) in water, oil, or air.
- This process alters the microstructure of steel, resulting in increased hardness but may reduce ductility.
Vacuum Hardening
- Vacuum hardening is a specialized heat treatment process performed in a vacuum environment to reduce oxidation and contamination.
- Involves heating steel to hardening temperatures in a vacuum furnace, followed by quenching in a vacuum or inert gas.
- Results in cleaner, higher-quality surfaces and improved mechanical properties.
Heat Treatment of Iron and Steel
- Heat treatment processes alter the physical and sometimes chemical properties of iron and steel through controlled heating and cooling.
- Common methods include:
- Annealing: Slow cooling to relieve internal stresses and improve ductility.
- Quenching: Rapid cooling to increase hardness, often following heating.
- Tempering: Reheating quenched steel to reduce brittleness while retaining some hardness.
- The selection of the heat treatment process depends on the desired characteristics for specific applications.
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Description
Test your knowledge of engineering materials and heat treatment with this comprehensive question bank. Learn about ferrous and non-ferrous metals, as well as other key concepts related to engineering materials and heat treatment. Ideal for students of DPMT Year II.
