冶金教程3表面處理(已修改)
2025-05-13 22:16 本頁(yè)面
【正文】 29/05/2022 1/41 Course of Metallurgy 冶金教程 Part 2 – Heat Treatments and Surface Treatments 第二部分 熱處理與表面處理 A. Mantini Quality 2 Wheels 29/05/2022 2/41 INDEX 索引 1 – Heat treatments of steels 鋼的熱處理 Annealing 退火 Normalizing 正火 Quenching 淬火 Tempering 回火 Stress Relieving 應(yīng)力消除 2 – Surface Thermo Chemical Treatments of steels 鋼的表面熱 化學(xué)處理 Case Hardening 表面硬化 Nitriding 滲氮 3 Protection Surface Treatments of steels 鋼的表面保護(hù)處理 Phosphating 磷化 Zinc Plating (Galvanizing) and Dacromet 鍍鋅與 Dacromet Chrome Plating 鍍鉻 29/05/2022 3/41 Heat Treatment of Steels 鋼的熱處理 1 ANNEALING 退火 Ferrite and Pearlite (globular) 鐵素體與珠光體 (球狀 ) 2 NORMALIZING 正火 Ferrite and Pearlite (lamellar) 鐵素體與珠光體 (薄片狀 ) 3 – QUENCHING (Hardening) 淬火 (淬水 ) Martensite, Bainite 馬氏體，貝氏體 4 TEMPERING 回火 Tempering Martensite (Sorbite) 馬氏體回火 (富氮碳鈦礦 ) 5 – STRESS RELIEVING 消除應(yīng)力 Martensite 馬氏體 6 – SURFACE HARDENING (Quenching + Tempering + Surface Quenching + Stress Relieving) 表面硬化 (淬火 +回火 +表面淬火 +消除應(yīng)力 ) 7 – DIFFUSION THERMO CHEMICAL TREATMENTS (Case Hardening, Nitriding) 滲透熱 化學(xué)處理 (表面硬化與滲氮 ) 29/05/2022 4/41 Heat Treatment of Steels 鋼的熱處理 Time Temperature 176。C 溫度 AC3 AC1 g a + g a Normalizing正火 Quenching淬火 MS Tempering 回火 Annealing退火 Stress Relieving消除應(yīng)力 29/05/2022 5/41 Heat Treatments of Steels鋼的熱處理 Time Temperature 176。C AC3 AC1 g a + g a MS MF Quenching + Tempering 淬火 +回火 29/05/2022 6/41 Heat Treatments of Steels 鋼的熱處理 Steel 38NiCrMo4 鋼 38NiCrMo4 Workmanship annealing: 工藝退火 austenitizing 850176。 C for 1 hour, furnace cooling. 奧氏體化 850 176。 C 一個(gè)小時(shí)，爐冷 Microstructure: Ferrite Pearlite with globular pearlite 顯微組織：鐵素體 球狀珠光體 Brinell Hardness HB = 180 布氏硬度 HB=180 Ultimate Strength R = 635 N/mm2 極限強(qiáng)度 R = 635 N/mm2 29/05/2022 7/41 Heat Treatments of Steels 鋼的熱處理 Steel 38NiCrMo4 Normalized: austenitizing 860176。 C for 30?, air cooling (out of furnace) 正火：奧氏體化 860 176。 C 30分鐘，空冷 (在爐外 ) Microstructure: Ferrite Pearlite with lamellar pearlite. 顯微組織：鐵素體 薄片狀珠光體。 Rockwell Hardness HRC = 20 洛氏硬度 HRC = 20 Ultimate Strength R = 770 N/mm2 極限強(qiáng)度 R = 770 N/mm2 Yield Strength RS= 600 N/mm2 A5 = 20% 屈服強(qiáng)度 RS= 600 N/mm2 A5 = 20% Toughness KCU = 200 Joules 韌性 /剛性 KCU = 200 Joules 29/05/2022 8/41 Heat Treatment of Steels 鋼的熱
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