Ti-6Al-4V金属粉末注射成形喂料的制备与性能表征.pdfVIP

HoWorkingTechnology2020,Vol.49,No.6

Ti-6A1-4V金属粉末注射成形喂料的

制备与性能表征

刘春林\张钱鹏\郭均文2,张杨2,史安康I

(1.常州大学材料科学与工程学院，江苏常州213164;2.江苏精研科技股份有限公，江苏常州213023)

摘要：通过Ti・6Ak4V粉末制备金属粉末注射成形喂料。利用转矩流变仪确定喂料的临界粉末装载量，观察喂料

粘度的变化，判断喂料的均匀性。采用旋转流变仪对喂料进行流变实验。通过改变烧结温度确定合适的烧结工艺。结果

表明，喂料的临界粉末装载量为51%,混炼2次能使喂料更均匀密实。喂料的粘度随剪切速率的增加而减小，喂料呈假

塑性流体行为。当烧结温度为1280£时，烧结坯密度为4.32g-cm\抗拉强度为987MPa,此时拉伸断面具有较少的孔

洞结构和较好的结构完整性。

关键词:TI-6A1-4V；金属粉末注射成形；临界粉末装载量；流变性能；抗拉强度

DOI:10.14158/j・cnki・1001-3814

中图分类号:TG146.23文献标识码：A文章编号:1001-3814(2020)6-0098-05

PreparationandPropertyCharacterizationofTi-6A1-4VFeedstock

byMetalPowderInjectionMolding

LIUChunlin1,ZHANGQianpeng1,WUJunwen2,ZHANGYang2,SHIAnkang1

(1.SchoolofMaterialsScienceandEngineering,ChangzhouUniversity,Changzhou213164,China;2.JiangsuGian

TechnologyCo.,Ltd.,Changzhou213023,China)

Abstract:ThefeedstockofTi-6A1-4Vformetalpowderinjectionmoldingwasprepared.Thecriticalpowderloadingof

thefeedstockwasmeasuredbytorquerheometer.Thechangeoftheviscosityoffeedstockwasobservedtodeterminethe

homogeneityoffeedstock.Therheologicalexperimenofthefeedstockwascarriedoubyrotaryrheometer.Thesuitable

sinteringprocesswasdeterminedbychangingthesinteringtemperature.Theresultsindicatethecriticalpowderloadingofthe

feedstockis51%,andthefeedstockbecomesmorehomogeneityanddenseaftermixing2times.Theviscosityofthe

feedstockdecreaseswiththeincreaseofshearrateandthefeedstockexhibitspseudoplasticfluidbehavior.Whenthesintering

temperatureis1280°C,thedensityofthesinteredbilleis4.32g•cm3,an