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1、24/06/2017,1/41,Course of Metallurgy 冶金教程 Part 2 Heat Treatments and Surface Treatments 第二部分 热处理与表面处理,A. Mantini,Quality 2 Wheels,24/06/2017,2/41,INDEX 索引,1 Heat treatments of steels 钢的热处理 - Annealing 退火 - Normalizing 正火 - Quenching 淬火 - Tempering 回火 - Stress Relieving 应力消除 2 Surface Thermo Chemical
2、 Treatments of steels 钢的表面热-化学处理 - Case Hardening 表面硬化 - Nitriding 滲氮 3 - Protection Surface Treatments of steels 钢的表面保护处理 - Phosphating 磷化 - Zinc Plating (Galvanizing) and Dacromet 镀锌与 Dacromet - Chrome Plating 镀铬,24/06/2017,3/41,Heat Treatment of Steels 钢的热处理,1 - ANNEALING 退火 Ferrite and Pearlite
3、(globular) 铁素体与珠光体(球状)2 - NORMALIZING 正火 Ferrite and Pearlite (lamellar) 铁素体与珠光体(薄片状) 3 QUENCHING (Hardening) 淬火(淬水) Martensite, Bainite 马氏体，贝氏体4 - TEMPERING 回火 Tempering Martensite (Sorbite) 马氏体回火(富氮碳钛矿)5 STRESS RELIEVING 消除应力 Martensite 马氏体6 SURFACE HARDENING (Quenching + Tempering + Surface Quenc
4、hing + Stress Relieving) 表面硬化(淬火+回火+表面淬火+消除应力)7 DIFFUSION THERMO CHEMICAL TREATMENTS (Case Hardening, Nitriding) 渗透热-化学处理(表面硬化与渗氮),24/06/2017,4/41,Heat Treatment of Steels 钢的热处理,Time,Temperature C 温度,AC3,AC1,g,a + g,a,Normalizing正火,Quenching淬火,MS,Tempering 回火,Annealing退火,Stress Relieving消除应力,24/06/2
5、017,5/41,Heat Treatments of Steels钢的热处理,Time,Temperature C,AC3,AC1,g,a + g,a,MS,MF,Quenching + Tempering 淬火+回火,24/06/2017,6/41,Heat Treatments of Steels 钢的热处理,Steel 38NiCrMo4 钢38NiCrMo4 Workmanship annealing: 工艺退火-austenitizing 850C for 1 hour, furnace cooling.奥氏体化 850 C 一个小时，炉冷Microstructure: Ferri
6、te -Pearlite with globular pearlite 显微组织：铁素体-球状珠光体Brinell Hardness HB = 180布氏硬度 HB=180Ultimate Strength R = 635 N/mm2 极限强度 R = 635 N/mm2,24/06/2017,7/41,Heat Treatments of Steels 钢的热处理,Steel 38NiCrMo4Normalized: austenitizing 860C for 30, air cooling (out of furnace)正火：奥氏体化 860 C 30分钟，空冷(在炉外)Microst
7、ructure: Ferrite - Pearlite with lamellar pearlite.显微组织：铁素体-薄片状珠光体。Rockwell Hardness HRC = 20洛氏硬度 HRC = 20Ultimate Strength R = 770 N/mm2 极限强度 R = 770 N/mm2Yield Strength RS= 600 N/mm2A5 = 20% 屈服强度 RS= 600 N/mm2A5 = 20%Toughness KCU = 200 Joules韧性/刚性 KCU = 200 Joules,24/06/2017,8/41,Heat Treatment o
8、f Steels 钢的热处理,Steel 38NiCrMo4Quenching: austenitizing 860C for 30, oil cooling淬火：奥氏体化860 C 30分钟，油冷Microstructure: Acicular Martensite.显微组织：针状奥氏体Rockwell Hardness HRC = 55洛氏硬度 HRC = 55Ultimate strength R = 1980 N/mm2极限强度 R = 1980 N/mm2Yield strength RS = N.D.A% = N.D 屈服强度 RS = N.D.A% = N.DKCU = N.D.
9、,24/06/2017,9/41,Heat Treatments of steels 钢的热处理,Steel 38NiCrMo4Quenching: austenitizing 860C for 30, salt bath at 330C for 1 hour, air cooling淬火：奥氏体化 860 C 30 分钟， 在330 C 盐浴一个小时， 空冷Microstructure: Bainite显微组织：贝氏体Rockwell Hardness HRC = 42洛氏硬度 HRC = 42Ultimate Strength R = 1347 N/mm2 极限强度 R = 1347 N/
10、mm2Yield Strength RS = 1200 N/mm2A5 = 15%屈服强度 RS = 1200 N/mm2A5 = 15%KCU = 130 Joules,24/06/2017,10/41,Heat Treatment of steels 钢的热处理,Steel 38NiCrMo4Quenching: austenitizing 860C for 30, oil cooling淬火： 奥氏体化 860 C 30分钟，油冷Stress relieving: 200C for 2 hours消除应力： 200C 达2个小时Microstructure: Acicular Marte
11、nsite 显微组织：针尖状马氏体Rockwell Hardness HRC = 52洛氏硬度 HRC = 52Ultimate strength R = 1820 N/mm2 极限强度 R = 1820 N/mm2Yield Strength RS = 1550 N/mm2A5 = 8%屈服强度 RS = 1550 N/mm2A5 = 8%KCU = 30 Joules,24/06/2017,11/41,Heat Treatment of steels 钢的热处理,Steel 38NiCrMo4Quenching: austenitizing 860C for 30, oil cooling
12、.淬火：奥氏体化 860 C 达30分钟，油冷Tempering: 600C for 2 hours回火600 C达2小时 Microstructure: Tempered Martensite (Sorbite).显微组织： 回火马氏体(富氮碳钛矿)Rockwell Hardness HRC = 32洛氏硬度 HRC = 32 Ultimate Strength R = 1050 N/mm2 极限强度 R = 1050 N/mm2Yield Strength RS = 900 N/mm2A5 = 14%屈服强度 RS = 900 N/mm2A5 = 14%KCU = 120 Joules,24/06/2017,12/41,Heat Treatment of steels 钢的热处理,24/06/2017,13/41,Heat Treatments of steels 钢的热处理,24/06/2017,14/41,Heat Treatments of steels 钢的热处理,24/06/2017,15/41,Heat Treatments of steels 钢的热处理,24/06/2017,16/41,Heat Treatments of steels 钢的热处理,24/06/2017,17/41,Surface Hardening 表面处理,
