基金项目:国家自然科学基金(52231003)作者简介:郑健(1982-),男,高级工程师;E-mail:xlrzhj@163.com;收稿日期:2022-09-21DOI:10.20057/j.1003-8620.2022-00135Cu/Sb/Sn/Mo/W对新国标09CrCuSb钢组织及力学性能的影响郑健1,彭志贤2,袁渊1,黄振华1,袁泽喜2,刘静2(1湖南华菱湘潭钢铁有限公司,湘潭411101;2武汉科技大学省部共建耐火材料与冶金国家重点实验室,武汉430081)摘要:采用金相显微镜、扫描电镜、电子探针、拉伸力学性能测试、夏比冲击测试,研究了新国标NB/T47019-2021的09CrCuSb钢合金元素Cu、Sb、Sn、Mo和W对其微观组织和力学性能的影响。研究表明,新标准中增加的合金元素将促进钢中δ-铁素体的析出,同时也会增加材料强度但会降低其塑性;δ-铁素体将显著降低材料冲击力学性能[其中,Rp0.2=365.64MPa,夏比冲击功KV2为243J(室温)和192J(-40℃)],使得冲击断口由塑性断口向脆性断口特征转变,特别是对-40℃的冲击功降低作用尤为显著。在新国标成分框架下,须通过合理的热加工工艺调整,降低钢中δ-铁素体的析出,从而提高材料力学性能。关键词:09CrCuSb钢;力学性能;硫酸露点腐蚀;锅炉用钢EffectofCu/Sb/Sn/Mo/WonStructureandMechanicalPropertiesofNewNationalStandard09CrCuSbSteelZhengJian1,PengZhixian2,YuanYuan1,HuangZhenhua1,YuanZexi2,LiuJing2(1HunanXiangtanIronandSteelGroupCo.,Ltd.,Xiangtan,411101;2TheStateKeyLaboratoryofRefractoriesandMetallurgy,WuhanUniversityofScienceandTechnology,Wuhan,430081)Abstract:Inthispaper,theeffectsofalloyelementsCu,Sb,Sn,MoandWofnewnationalstandard09CrCuSbontheirmicrostructureandmechanicalpropertiesarestudiedbymeansofmetallographicmicroscope,scanningelectronmicroscope,EPMA,tensilemechanicalpropertytestandCharpyimpacttest.Theresultsshowthattheadditionofalloyingelementswillpromotetheprecipitationofδ-ferritetoincreasethestrengthofthematerialbutreduceitsplasticity;δ-ferritewillsignifi-cantlyreducetheimpactmechanicalpropertiesofthematerial,makingtheimpactfracturechangefromplasticfracturetobrittlefracture,especiallyfortheimpactenergyat-40℃[Amongthem,Rp0.2=365.64MPa,CharpyimpactenergiesKV2243J(ambient)and192J(-40℃)].Undertheframeworkofthenewnationalstandardcomposit...