If steel is heated to a temperature well below red heat and is then cooled slowly, the process is called_________?
Correct answer: A. Annealing
- A. Annealing
- B. Quenching
- C. Tempering
- D. Nitriding
Explanation
Annealing involves heating steel and then cooling it slowly, allowing internal stresses to decrease and producing a softer, more workable structure. Quenching is the opposite type of rapid cooling, while tempering is reheating quenched steel to a controlled temperature.
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About Crystalline Solids
Crystalline solids contain particles arranged in a regular repeating lattice described by a unit cell. Their study includes coordination number, packing efficiency, density, anisotropy, cleavage, polymorphism and common crystal systems, along with ionic, molecular, covalent network and metallic crystals. Crystalline order differs from the random arrangement of amorphous solids.
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