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《Fe40-A160掺杂钨精矿粉激光自蔓延烧结合金组织及性能研究.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36卷第1期兵器材料科学与工程Vol-36No.12013年1月ORDNANCEMATERIALSCIENCEANDENGINEERINGJan.,2013网络出版时间:2013—1.1223:28网络出版地址:http://www.cnki.net/kcms/detail/33.1331.TJ.20130112.2328.005.htmlre40一Al60掺杂钨精矿粉激光自蔓延烧结合金组织及陛能研究李刚,于君娜,罗崇辉(辽宁工程技术大学材料科学与工程学院,辽宁阜新123000)摘要采用不同激光输出功率对掺杂一定含
2、量钨精矿粉末re40一A60粉末压坯进行激光点燃自蔓延烧结,利用XRD,SEM,硬度、磨损和耐蚀性测试等表征手段,分析研究引燃功率对烧结合金微观组织结构及宏观性能的影响。结果表明:合金组织为条状组织,且随着引燃功率的增加,组织愈加均匀;产物物相主要为A1CrFe,A1Fe,FeA1,A1FeI~,A1Fe及硬质颗粒相WO,。当引燃功率为1100W,合金的烧结密度最大为4.47g/cm,孔隙率最低为4.41%;烧结合金的耐蚀性能最佳,合金的致钝电流密度最小为79.8mA/cm2,维钝电流密度也最小为0.37mA/cm2
3、;烧结合金硬度达到最大值,a层为l309.7HK,b层为1003HK。当引燃功率为1000W,烧结合金的a,b两层相对磨损量最低为0.06,0.05mg/mm。关键词激光;燃烧合成;钨精矿粉;微观组织;力学特性中图分类号TG156.99文献标识码A文章编号1004—244X(2013)01—0057—05Microstructureandpropertiesofre40一6ocompositematerialblendedtlltungstenconcentratepowderpreparedbylaserignit
4、ioninducedSHSLIGang,YUJunna,LUOChonghui(CollegeofMaterialScienceandEngineering,LiaoningTechnicalUniversity,Fuxin123000,China)Abstractre40一A160alloyblendedwithtungstenconcentratepowderwaspreparedbylaserignitioninducedSHSwithdifferentignitionpower.BymeansofXRD,SE
5、M,hardnesstest,abrasiontestandcorrosionresistancetest,theinfluencesoflaserignitionpoweronmicrostructureandmacroscopicpropertiesofthesinteredalloyswerestudied.Theexperimentalresultsshowthatthemicrostructureofthesinteredalloyisfeaturedwithmorphologicalcharacteris
6、ticofstrip,andthemicrostructurebecomesevenwiththeincreaseoflaserignitionpower.ThesinteredalloymainlyconsistsofA1CrFe2,A1Fe,reAl3,A186Fel4,A15Fe2,WO3.Whentheignitionpoweris1100W,thedensityofthesinteredalloyisthehighest,whichis4.47g/cm,whiletheporosityisthelowest
7、,whichis4.41%;thecorosionresistanceisthebest,andthepassivationcurrentdensityandtheinducedbluntcurentdensityarethelowest,whichare0.37mA/cmand79.8mA/cm,respectively;themicrohardnessofthesinteredalloyisthebiggest,layeraandbofwhichis1309.7HKand1O03HK;whentheignitio
8、npoweris1000W,therelativewearrateofthesinteredalloyarethelowest,layeraandbofwhichis0.06and0.05mg/mm,respectively.Keywordslaser;sintering;tungstenconcentratepowder;microstruc
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