Heat Treatment 0.0 / 5 ? Design & Technology: Resistant MaterialsHeat TreatmentGCSEAQA Created by: Mr_MackintoastCreated on: 01-06-17 17:00 What is case hardening? Case hardening is the process of hardening the skin of mild steel allowing metals to retain internal elastic properties 1 of 7 How is case hardening done? Case Hardening: Heat to cherry red & dip in carbon powder, repeat x3 2 of 7 What is hardening & tempering done on? Hardening & Tempering is only done on carbon steel 3 of 7 What does hardening & tempering do? Hardening & Tempering increases hardness but makes it brittle. Tempering reduces brittleness 4 of 7 How is hardening & temerping done? Hardening & Tempering: to heat to correct temperature. Quench immediately. 5 of 7 What does annealing do? Annealing makes ferrous and non-ferrous metaks less brittle, softens metal and reduces stresses causes by cold working 6 of 7 How is annealing done? Annealing: Heat to correct temperature and allow to cool 7 of 7
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