冶金教程3表面处理

《冶金教程3表面处理》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、CourseofMetallurgy冶金教程Part2–HeatTreatmentsandSurfaceTreatments第二部分热处理与表面处理A.MantiniQuality2Wheels09/09/20211INDEX索引1–Heattreatmentsofsteels钢的热处理-Annealing退火-Normalizing正火-Quenching淬火-Tempering回火-StressRelieving应力消除2–SurfaceThermoChemicalTreatmentsofsteels钢的表面热-化学处理-CaseHarden

2、ing表面硬化-Nitriding滲氮3-ProtectionSurfaceTreatmentsofsteels钢的表面保护处理-Phosphating磷化-ZincPlating(Galvanizing)andDacromet镀锌与Dacromet-ChromePlating镀铬09/09/20212HeatTreatmentofSteels钢的热处理1-ANNEALING退火FerriteandPearlite(globular)铁素体与珠光体(球状)2-NORMALIZING正火FerriteandPearlite(lamellar)铁素体

3、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TemperingMartensite(Sorbite)马氏体回火(富氮碳钛矿)5–STRESSRELIEVING消除应力Martensite马氏体6–SURFACEHARDENING(Quenching+Tempering+SurfaceQuenching+StressRelieving)表面硬化(淬火+回火+表面淬火+消除应力)7–DIFFUSIONTHERMOCHEMICALTREATMENT

4、S(CaseHardening,Nitriding)渗透热-化学处理(表面硬化与渗氮)09/09/20213HeatTreatmentofSteels钢的热处理TimeTemperature°C温度AC3AC1ga+gaNormalizing正火Quenching淬火MSTempering回火Annealing退火StressRelieving消除应力09/09/20214HeatTreatmentsofSteels钢的热处理TimeTemperature°CAC3AC1ga+gaMSMFQuenching+Tempering淬火+回火09/09

5、/20215HeatTreatmentsofSteels钢的热处理Steel38NiCrMo4钢38NiCrMo4Workmanshipannealing:工艺退火-austenitizing850°Cfor1hour,furnacecooling.奥氏体化850°C一个小时，炉冷Microstructure:Ferrite-Pearlitewithglobularpearlite显微组织：铁素体-球状珠光体BrinellHardnessHB=180布氏硬度HB=180UltimateStrengthR=635N/mm2极限强度R=635N/mm

6、209/09/20216HeatTreatmentsofSteels钢的热处理Steel38NiCrMo4Normalized:austenitizing860°Cfor30’,aircooling(outoffurnace)正火：奥氏体化860°C30分钟，空冷(在炉外)Microstructure:Ferrite-Pearlitewithlamellarpearlite.显微组织：铁素体-薄片状珠光体。RockwellHardnessHRC=20洛氏硬度HRC=20UltimateStrengthR=770N/mm2极限强度R=770N/mm

7、2YieldStrengthRS=600N/mm2A5=20%屈服强度RS=600N/mm2A5=20%ToughnessKCU=200Joules韧性/刚性KCU=200Joules09/09/20217HeatTreatmentofSteels钢的热处理Steel38NiCrMo4Quenching:austenitizing860°Cfor30’,oilcooling淬火：奥氏体化860°C30分钟，油冷Microstructure:AcicularMartensite.显微组织：针状奥氏体RockwellHardnessHRC=55洛氏硬

8、度HRC=55UltimatestrengthR=1980N/mm2极限强度R=1980N/mm2YieldstrengthRS=N.D