大断面球铁件石墨漂浮浅析

Sup.200112SHANXIFORESTRYSCIENCEANDTECHNOLOGYDec12001:10072726X(2001)20007204(,043010):2001209206:(19532),,,1979,:,,,:;;;:TF59312:A,55mm95mm,,,,,,,,,1,,15mm,,,;:,,,,1,1,,,,21CMnSSiP31380168010060139010433177016901080[1],,,,,,,(20mm),,,,(75mm)::,,,,,,(1280),,,,214%22,,,,,,,,,,,,,,,,,:,,,,,,,,,(tokes),011mm:F=3PdTG(1):d(m);T(mös);G(Nsöm2),,,:F=V(rj-rg)=1ö6Pd3(rj-rg)(2):V(m3);rj(7200Nöm3);rg(2250Nöm3),,:F=F(1)(2):d=412GVö$Cd0,d0=412V0Gö$C(V0),d0G,,,d0dd0,,,82001,3311,,,312,,,,,+,,,,dd0;,,,,,,,,,,dd0,,:313SPSP,SP,,d0,314,,,,;,4(1)CE415%;,,,(2),12901320(3)Si,Si213%,Si(4);(5),,(6),Re01020105,,,5(1),,,,dd0,9:(2);,(3),,,(4),,,StudyofGraphiteFloatinginLargeSectionGlobularIronCastingXIAODe-quan(ShanxiForestryMachineFactory,043010Houma,China)Abstract:Mechanismofcausinggraphitefloatingwasstudied,andconsideredthatgraphitefloatingdependsibytsnatureonthesizeofgraphiteball,andthefloatinggraphiteisonlyfreegrowingoneandConceptionofcriticalsizetographitefloatingwaspresentedandthemosteffectivemethodtosolvegraphitefloatingwasgivenofcontrollingcarbonequivalentandquicklycooling.Keywords:graphitefloating;coolingspeed;carbonequivalent;sizeofgraphiteball(6):[1],,,1[J],,1986(6):13161[2],,,1[J],,1986(2):461[3]1[J],,1981(3):10111[4]1[J],,1997(3):35391StudyonThePiedWagtaillandGreenfinchBreedingPeriodoutofNestFANLong-suo1,ZHANGLong-sheng2,SONGQiu-ju1,LIUHuan-jin3(1.LishanNatureReserve,043211Qinshui,China;2.ShanxiNatureReserveManagingStatin,030013Taiyuan,China;3.ShanxibiologyResearchInstitute,030006Taiyuan,China)Abstract:From1993to1998,theauthorstudiedthepiedwagtaill(Motacillaalba)andgreenfinch(Cardueilssinica)breedingperiodoutofnestes.Thestudycontertoftreedingperiodoutofnestes,youngbirdsactivitiesandsurvivalrate.TheresultsshowthatthePieswagtaillbreedingperiodoutofnestesis5d7d,deathrateis54.3%andtheGreenfinchbreedingperiodoutofnestesif6d8d,deathrateis51.6%.Keywords:piedwagtaill;greenfinch;breedingperiodoutofnestes;LishanNatureReserve012001