Page 46 - Heat Treatment of Steels (การอบ-ชุบ เหล็กกล้า)
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Austenite transition temperature                                                                         Martempering

                     Full annealing                           Hardening                           Austempering



                                Spheroidizing


                                                                        Stress-relieving





                                                                                     Tempering

                                                                                                                                      M  s















                                               Heat treatment thermal cycles



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