鎢粉生產(chǎn)工藝研究畢業(yè)論文

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1、XXXXXX畢業(yè)論文鎢粉生產(chǎn)工藝的研究學(xué)生：XXX學(xué)號(hào)：XXXX專業(yè)：物理學(xué)班級(jí)：XXXX指導(dǎo)教師：XXXXXXXXXXXXXX二O一三年六月I摘要摘要鎢粉在工業(yè)生產(chǎn)中占著越來越重要的位置，本文著重對(duì)鎢粉的生產(chǎn)工業(yè)做出來研究，其中包括研究鎢金屬的性質(zhì)和用途，鎢的物理性質(zhì)；化學(xué)性質(zhì)以及鎢的實(shí)際用途。只有了解鎢的性質(zhì)和性能的重要性才能更好更透徹的研究鎢的生產(chǎn)工藝。金屬鎢具有廣泛的用途，鎢合金中最主要的原料是鎢粉，其粒度的大小對(duì)合金的性能起關(guān)鍵性的作用。鎢粉的粒度主要為粗、中、細(xì)粒。含細(xì)顆粒的合金比含粗顆粒的合金，其性能明顯的提高；若合金含超細(xì)晶粒，則性能可產(chǎn)生質(zhì)的飛躍,達(dá)

2、到高強(qiáng)度與高硬度的統(tǒng)一，從而擴(kuò)展其應(yīng)用領(lǐng)域。同時(shí)，金屬鎢在這些領(lǐng)域中的應(yīng)用還與其形貌、粒度的分布有著密切的關(guān)系。本文綜述了近年來超細(xì)鎢粉的多種制備方法，并對(duì)比不同方法所制備超細(xì)粉末的優(yōu)缺點(diǎn)。最后在生產(chǎn)工藝的介紹中本文挑選了目前工業(yè)上最常用的三氧化鎢還原法制作鎢粉的方法以及各種超細(xì)鎢粉的生產(chǎn)方法做出了分析和研究。關(guān)鍵詞：鎢粉；性質(zhì)用途；工業(yè)研究；超細(xì)鎢粉；三氧化鎢氫還原法III摘要III摘要ABSTRACTTungstenpowder?inindustrialproduction?occupied?anincreasinglyimportantposition,this

3、paperfocuses?on?theproductionof?tungstenpowder?madeout?ofindustrialresearchincluding?research?ontheproductionoftungsten,?tungsten?physicalproperties;?chemicalproperties?aswellas?theactualuseoftungsten.OnlybyunderstandingthenatureandPropertiesoftungsteninordertobettertheimportanceofamore

4、thoroughstudyoftungstenproductionprocess.Tungstenwithawiderangeofusesthemostimportantrawmaterialfortungstenalloyoftungstenpowder,theparticlesizeofthesizeofthealloyplayacrucial?roleintheperformance.?Thegrainsizeof?thetungsten?powder?is?coarse,mediumand?fine.Alloys?containing?fineparticle

5、s?than?coarseparticles?containing?alloy,itsperformance?significantlyimproved;?if?alloy?containing?finegrain,the?performancecanbe?aqualitativeleap,toachievehigh?strengthand?highhardness?unity?toextenditsfieldofapplication.?Meanwhile,themetal?tungsten?intheseareas?andtheirapplication?also

6、?morphology,?particlesize?distribution?hasacloserelationship.?Thispaperreviewsrecent?varietyof?fine?tungstenpowder?preparationmethod,?andcomparethe?differentmethods?ofUltrafine?Powder?advantagesanddisadvantages.Finally,in?theintroductionto?thispaper,?theproductionprocess?ofthecurrentsel

7、ectionof?themostcommonlyused?industrial?reduction?oftungstentrioxidetungstenpowder?production?methods?andavarietyof?ultra-fine?tungstenpowderproductionmethods?madethe?analysisandresearch.Keywords:tungsten;powdernature?uses;industrialresearch;ultrafine?tungsten;tungstentrioxide?