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ID:52269018
大小:7.74 MB
页数:5页
时间:2020-03-26
《退火时间对超纯铁素体含铜不锈钢组织与性能的影响.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第40卷第9期Vol.40No.92015年9月HEATTREATMENTOFMETALSSeptember2015工艺研究退火时间对超纯铁素体含铜不锈钢组织与性能的影响尹鸿祥,赵爱民,赵征志,周开春,裴伟,闫远(北京科技大学冶金工程研究院,北京100083)摘要:为开发具有抗菌性能的超纯铁素体不锈钢,添加1.4%Cu于21%Cr铁素体不锈钢,研究了退火时间对试验钢组织、抗菌性能以及力学性能的影响。利用光学显微镜和透射电镜等微观分析方法对不同退火工艺试验钢进行了组织结构表征,利用电子背散射衍射测量了试验钢的微观织构,通过拉伸试
2、验机测试了钢的拉伸性能。结果表明,退火时间1h后,抗菌性能超过99%,屈服强度347MPa,抗拉强度488MPa,伸长率29.2%。随着退火时间的延长,析出相形貌由球状转变为杆状,尺寸增大,间距减小。试验钢的抗菌性能与铜的存在形式、析出量及形态有关,尺寸为500nm左右的杆状铜析出相具有优良的抗菌效果。试验钢退火1min时,析出相与基体呈半共格关系,强化作用最强。试验钢的第二相的临界转化尺寸为30nm。关键词:铁素体不锈钢;铜合金化;抗菌性能;退火时间;析出相中图分类号:TG142.1;TG113.25文献标志码:A文章编号:
3、0254-6051(2015)09-0109-05EffectsofannealingtimeonmicrostructureandpropertiesofultrapurifiedferriticstainlesssteelcontainingcopperYinHongxiang,ZhaoAimin,ZhaoZhengzhi,ZhouKaichun,PeiWei,YanYuan(SchoolofEngineeringResearchInstitute,UniversityofScienceandTechnologyBeiji
4、ng,Beijing100083,China)Abstract:Fordevelopingtheultrapurifiedferriticanti-bacterialstainlesssteel,1.4%Cuwasaddedin21%Crferriticstainlesssteel.Effectsofannealingtimeonmicrostructure,mechanicalpropertiesandantibacterialpropertywereanalyzed.Microstructureofthesteelafte
5、rdifferentannealingwereinvestigatedbymeansofopticalmicroscopeandtransmissionelectronmicroscopy.Microtextureofthesteelwasmeasuredbyelectronbackscatteringdiffractionanalysisandthemechanicalpropertiesweremeasuredbytensiletester.Theresultsshowthattheantibacterialrateoft
6、hesteelannealedfor1hismorethan99%,theyieldstrengthis347MPa,tensilestrengthis488MPa,andthetotalelongationis29.2%.Withtheincreaseofannealingtime,themorphologyofthesphericalprecipitateschangeintorod,thesizeincreasesandspacingdecreases.Theantibacterialpropertiesoftheste
7、elarerelatedtotheform,amountandmorphologyofthecopperphaces.Whenthesizeofrod-shapedcopperprecipitatesareabout500nm,theantibacterialpropertiesareexcellent.Whenannealedfor1min,therelationshipbetweenprecipitationandmatrixissemi-coherent,andthestrengtheningeffectisthebes
8、t.Thecriticalsizeofthesecondphaseofthesteelisabout30nm.Keywords:ferriticstainlesssteel;Cualloying;antibacterialproperty;annealingtime;prec
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