彩色鍍鋅工藝及理論研究.pdf

1、東北大學(xué)博士學(xué)位論文樂(lè)啟熾摘要彩色熱浸鍍鋅工藝是把熱鍍鋅與高溫氧化相結(jié)合的生產(chǎn)彩色鋼板的新方法，該工藝及其產(chǎn)品具有彩色涂層鋼板無(wú)法比擬的優(yōu)越性，因此，具究開(kāi)發(fā)價(jià)值和廣泛應(yīng)用前景。本文對(duì)彩色熱浸鍍鋅工藝及理論進(jìn)行了較深入的研出下列研究成果:對(duì)彩色熱鍍鋅中鍍液合金元素、浸鍍溫度(TO及后處理方式和條件等對(duì)呈色影響的系統(tǒng)研究表明，呈色元素Mn和Ti的最大添加量(mass%)分別為。7和。.3改變合金元素含量、T。及浸鍍后處理方式等可控制試樣的

2、呈色色調(diào)、深度(飽和度)以及均勻性等指標(biāo)。對(duì)ZnMn二元鍍液，低Mn含量時(shí)，隨Tb升高，試樣呈色變化順序?yàn)?藍(lán)色一黃色一紫色一藍(lán)色，或，藍(lán)色一黃色一綠紫色一綠色(或黃綠色)，高M(jìn)n含量時(shí)為:藍(lán)色一黃色一紫色一綠色。增加Mn含量，各顏色的浸鍍溫度區(qū)間縮小，采用空冷時(shí)，Mn含量增加及T、升高加速了顏色的變化且隨冷卻時(shí)間推移顏色變化逐漸減慢。對(duì)ZnTi二元鍍液，隨Tb升高呈色依次發(fā)生如下變化:藍(lán)灰色一黃色一紫色一深藍(lán)色，其中紫色區(qū)很小，而Ti

3、含量對(duì)呈色沒(méi)有顯著影響。經(jīng)相同鍍液浸鍍的試樣，降低后處理冷卻速率，呈色種類增加，呈色飽和度(深度)提高，可呈色的最低浸鍍溫度(T..)降低，呈色區(qū)向低溫移動(dòng)。正交試驗(yàn)表明，MnNiCu有利于提高鍍液的綜合性能，Ti的利弊因情況不同而異，而Ce是有害元素。最優(yōu)鍍液組成與浸鍍后的冷卻速率有關(guān)，綜合考慮外觀質(zhì)量和獲良好外觀的T。區(qū)間大小時(shí)，室溫空冷和保溫爐保溫(冷卻速率較低)時(shí)的最優(yōu)鍍液為(mass%):ZnO.1Mn0.05NiO.OlCu

4、，水冷(冷速高)時(shí)為:Zn0.3MnO.1NiO.OlCu。若只考慮外觀質(zhì)量，水冷或空冷時(shí)的最優(yōu)鍍液分別為Zn0.3Mn0.15TiO.lNi0.01Cu和Zn0.lMn0.05Ti0.05Ni0.01CuoANSYS有限元計(jì)算表明，預(yù)熱鋼帶在鍍液中瞬間即達(dá)穩(wěn)定溫度場(chǎng)，而鋼帶出口端的溫度場(chǎng)對(duì)鋼帶呈色有重要影響:鋼帶出口溫度場(chǎng)與Tb及u(帶速)密切相關(guān)，鋼帶橫向溫差隨幾升高及u降低而增加橫向溫差沿縱向先增后減，呈現(xiàn)的峰值隨幾增加及u減小而

5、上升，且隨u增加向遠(yuǎn)離鋼帶的出口端方向移動(dòng)橫向最大溫差隨Tb增加而線性上升，隨u增加而降低，降低速率開(kāi)始時(shí)較小，在高于0.05ms后基本上呈線性下降。片狀試樣空冷時(shí)，角部溫降速率高于中心，且Tb越高速率梯度越大在鍍液組成或后處理不當(dāng)時(shí)所造成的較大溫差會(huì)導(dǎo)致表面色彩不均。開(kāi)發(fā)了用于RGB顏色識(shí)別的軟件，對(duì)彩色鍍鋅樣品顏色進(jìn)行了數(shù)據(jù)化識(shí)別。與用分光光度計(jì)實(shí)驗(yàn)檢測(cè)比較，此法不僅識(shí)別操作簡(jiǎn)便、快捷、準(zhǔn)確，而且成本低廉，且對(duì)測(cè)試樣品本身的尺寸、平

6、整度、表面質(zhì)量等也幾乎不作要求，可以用于表面質(zhì)量不高的一般工業(yè)產(chǎn)品的顏色測(cè)量。首次從熱力學(xué)角度對(duì)彩色鍍鋅液的呈色性能進(jìn)行了分析。ZnMnZnTiZnNi和東北大學(xué)博士學(xué)位論義樂(lè)啟熾ABSTRACTThetechniqueofcoloringhotdipgalvanizationisanewtechnologycombiningthehotdipgalvanizationwithhightemperatureoxidationforpro

7、ducingcolorsteelplates.Thesuperioritiesofitsprocessanditsmanufacturedproductsascomparedwithcoloredorganiccoatingplatesmakeittobeatechniqueworthyofstudyinganddevelopingandwithabrightfutureinapplications.Inthispapertherese

8、archworkshavebeencarriedoutprocessingparametersachieved.andtheoriesonthistechniqueandthefollowingresults1山ewereThestudieswerecarriedoutsystematicallyontheinfluencesofalloyingelementshotdiptemperature(TAandtheaftertreatme

9、ntsoncolorgenerationTheresultsshowthatmanganeseortitaniumasacolorgeneratingadditionagentinbaththeirmaximumsofadditions(mass%)are0.7and0.3respectivelyandthetonedeepness(saturation)anduniformityofcoloronthespecimenscanbeco

10、ntrolled妙alteringtheamountsofalloyingagentsTbandtheaftertreatments.ForZnMnbinaryalloybathwiththeTbincreasingtheorderofcolordevelopingiseitherblueyellowpurpleblueorblueyellow(greenpurple)green(oryellowishgreen)atlowermang

11、anesecontentandblueyellowpurplegreenathighermanganesecontent.WiththeincreasingofMncontentregionsofhotdiptemperatureforcolorsnarrowed.WiththeincreasingofMncontentandTbcolorchangemorefrequentlyandcolorchangeisfasterinthebe

12、ginningthanlaterascooledinopenair.ForZnTibinaryalloybathinwhichTbhasanotableinfluenceoncolorgeneration(Bluegray)yellowpurpledarkbluearepresentedinorderas幾elevatesandanarrowtemperatureintervalforpurplehowevertitaniumconte

13、nthashardlyefectoncolorgeneration.Thesamplesafterdippedinthesamebathwiththedecreasingofcoolingrateinaftertreatmentprocedurethekindofcolorgenerationisincreasedanditstonedeepened.幾regionofcolorgenerationmovestolowertempera

14、tureandtheminimumofcolorgenerationtemperature(Tm)islowered.Orthogonalexperimentaldesignindicatesthatmanganesenickelandcopperareallbeneficialtoimprovingcombinationpropertyofhotdipbaththeefectoftitaniumvarieswithconditions

15、andceriumisharmfulelement.Theoptimumcompositionofbathisrelatedwithcoolingrateafterhotdip.Asbothpresentationqualityandwhose幾regionareconcernedtheoptimumcomposition恤ass%)ofbathisZn0.1Mn0.05Ni0.0lCuforcooledinopenairorkepti