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ID:52271980
大小:10.55 MB
页数:6页
时间:2020-03-26
《铸造方法和正火对 Fe-Cu合金组织和切削加工性能的影响.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8期Vol畅40No畅82015年8月HEATTREATMENTOFMETALSAugust2015铸造方法和正火对Fe-Cu合金组织和切削加工性能的影响陈军,张强(吉林大学应用技术学院,吉林长春130012)摘要:采用硬度测试、显微组织观察和能谱分析等手段研究了不同铸造方法对Fe-Cu合金硬度与组织的影响,对比分析了铸态和正火态Fe-Cu合金的切削加工性能并探讨了合理的切削加工参数。结果表明,金属型铸造Fe-Cu合金的硬度最高,耐火砖型铸造Fe-Cu合金的硬度最低;合金铸造时的冷却速度与其硬度呈正影响关系,冷却速度越大则合
2、金硬度越高。金属型铸造Fe-Cu合金中,网状的组织主要分布在晶界处,而断续线状结构组织主要分布在晶粒内部;树脂砂型铸造Fe-Cu合金中,断续线状组织的数量明显减少,晶界处的白色组织从连续状转变为断续状,但是网状壁的厚度增加;耐火砖型铸造Fe-Cu合金中,晶界处的白色组织转变为柱状或者块状。随着冷却速度的逐步降低,Fe-Cu合金基体组织中Fe元素的含量逐渐增加,而Cu的含量逐渐降低;在切削参数相同的条件下,正火态Fe-Cu合金的切削力比铸态Fe-Cu合金的高。关键词:Fe-Cu合金;冷却速度;正火;组织;切削力中图分类号:TG166.2
3、文献标志码:A文章编号:0254-6051(2015)08-0168-06EffectsofcastingmethodandnormalizingtreatmentonmicrostructureandcuttingpropertiesofFe-CualloyChenJun,ZhangQiang(CollegeofAppliedTechnology,JilinUniversity,ChangchunJilin130012,China)Abstract:Theeffectsofpouringmodeonhardnessandmicros
4、tructureofFe-Cualloywereinvestigatedbymeansofhardnesstest,microstructureobservationandenergyspectrumanalysisrespectively.Comparativeanalysisofthecuttingpropertiesofas-castandnormalizedFe-Cualloywascarriedout,andthepropercuttingparameterswerediscussed.Theresultsshowthatt
5、heFe-Cualloypreparedwithpermanentmoldcastinghasthehighesthardnesswhilethatcastedwithrefractorybricktypemoldhasthelowesthardness.Thecoolingrateofthealloycastingispositivelyrelatedtoitshardness,thefasterthecoolingrate,thehigherthehardnessofthealloy.IntheFe-Cualloyprepared
6、withpermanentmoldcasting,thereticularstructureismainlydistributedatthegrainboundaries,whiletheintermittentlinearstructureismainlydistributedinthegrain.Theamountofintermittentlinearstructureinthealloypreparedwithresinsandcastingdecreasesobviouslyandthewhitestructureinthe
7、grainboundariesturnsfromcontinuoustointermittentstructure,however,thethicknessofthereticularwallincreases.IntheFe-Cualloypreparedwithrefractorybrickcasting,thewhitestructureinthegrainboundarieschangestocolumnarorblockstructure.Withthegradualdecreaseofthecoolingrate,thec
8、ontentofFeelementinthematrixoftheFe-CualloyincreasesgraduallywhiletheCucontentdecreasesgradually.Underthesamec
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