标准热处理状态下高强耐蚀C-22HS合金的显微组织和力学性能.pdf

第30卷第1期 北 京 科 技 大 学 学 报 V01．30No．1 2008年1月 Joumalof ofscien∞and Unive玮ity Technolo科Beijing Jan．2008 和力学性能 寇立忠 曾燕屏 谢锡善 北京科技大学材料科学与工程学院，北京100083 态下的显微组织及力学性能．结果表明：标准热处理状态下C一22Hs合金由大小不均匀的等轴晶组成，合金中析出相主要有 的塑性与冲击韧性；无论是在室温还是高温，它的屈服强度都大大高于c一22合金． 关键词镍基合金；显微组织；力学性能；析出相 分类号TGl46．1+5 Microstuctureand mechanical ofacorrosion·resistantC一22HS prOperties alloy with understandardheattreatmentcOndition highstrength KOU Xis^口扎 Li2虎o，29，ZENGy矗咒夕i咒g，XfE SchoolofMaterialsScienceaIld ofScienceaIld E119ineering，UniverSityTechnologyBe巧ing，Be酊iIlg100083，China ABSTRACTThemicrostructureandmechanical ofanewcorrosian—resistantC一22HSwith pmperties alloy understan— highstrength dardheattreatmentconditionwereStudiedmeansof by electron theⅡnodyll锄iccalculations，scanningmicroscopy(S sionelectron mechanical reSultsindicatethatC一22HSunder microscopy(TEM)andproperties standardheattreat— testing．The alloy mentconditionis of withdifferent inC～22HSare composedequiaxedgrains sizes．Majorprecipitations alloy and isshownthat disperseddistributingstrengtheningphaseNi2(Mo，Cr)．It C一22HSunderstandardheattreatmentcondition aHoy not a buta1Soabetter and Its ismuch than possessesonlyhigherstrength plasticityimpacttoughness．yield thatof strength higher C一22 atr∞m