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什么是深冷技術(shù)?

日期:2025-09-09 13:15
瀏覽次數(shù):0
摘要:<p class="p" style="margin-left:0pt;text-indent:0pt;line-height:18pt;background:#FFFFFF;"> 什么是深冷技術(shù)?<o:p></o:p> </p> <p class="p" style="margin-left:0pt;text-indent:0pt;line-height:18pt;background:#FFFFFF;"> “深冷處理技術(shù)”或“超深冷處理技術(shù)”&nbsp;(簡稱“深冷技術(shù)”)是近年來興起的一種提高中**金屬工件強(qiáng)度和耐磨性能的新工藝。所謂深冷技術(shù)是利用冷媒介,比如液氮,作為冷卻介質(zhì),將淬火后的金屬材料進(jìn)行深冷或接近**零度的超深冷處理,以改變金屬,以及工程塑料,陶瓷等材料的微細(xì)結(jié)構(gòu),從而提高材料的耐磨性,增加零部件的使用壽命。<o:p></o:p> </p> <p class="p" style="margin-left:0pt;text-indent:0pt;line-height:18pt;background:#FFFFFF;"> 金屬部件在淬火后,結(jié)構(gòu)中不穩(wěn)定的奧氏體會(huì)部分轉(zhuǎn)化為較穩(wěn)定的馬氏體.但由于很多**合金的完全轉(zhuǎn)化溫度(Mf)可低達(dá)-200℃,&nbsp;一般淬火技術(shù)無法實(shí)現(xiàn)結(jié)構(gòu)的完全轉(zhuǎn)變。只有在深冷處理過程中,金屬部件被冷卻到-200℃&nbsp;或以下,&nbsp;才能實(shí)現(xiàn)殘余奧氏體向馬氏體的完全轉(zhuǎn)化。同時(shí)在深冷條件下,亞穩(wěn)定的馬氏體會(huì)降低過飽和度,析出和彌散尺寸僅為20~60&nbsp;?&nbsp;的超微細(xì)碳化物。這些細(xì)小彌散的碳化物在材料塑性變形時(shí)可以阻礙位錯(cuò)運(yùn)動(dòng),從而大大增強(qiáng)金屬部件的抗磨損能力。馬氏體晶格的改變也使金屬部件內(nèi)部微觀應(yīng)力降低,基體組織強(qiáng)化,從而使金屬部件的硬度、抗沖擊韌性和耐磨性都得以顯著提高<o:p></o:p> </p> <p class="p" style="margin-left:0pt;text-indent:0pt;line-height:18pt;background:#FFFFFF;"> 深冷技術(shù)不同于其他任何一種傳統(tǒng)表面處理技術(shù)之處,在于深冷技術(shù)引起的結(jié)構(gòu)改變深及工件核心,是一種零部件的整體處理。因此被處理的部件可以反復(fù)磨用而不改變其性能。這種特點(diǎn)也進(jìn)一步數(shù)倍地延長了部件的使用壽命。<o:p></o:p> </p> <p class="p" style="margin-left:0pt;text-indent:0pt;line-height:18pt;background:#FFFFFF;"> 深冷技術(shù)在處理金屬部件時(shí)不僅不改變部件尺寸大小,相反,處理過程會(huì)減少淬火產(chǎn)生的內(nèi)應(yīng)力,&nbsp;從而增強(qiáng)尺寸穩(wěn)定性。<o:p></o:p> </p> <p class="p" style="margin-left:0pt;text-indent:0pt;line-height:18pt;background:#FFFFFF;"> 深冷技術(shù)是目前提高金屬材料工件性能*有效,*經(jīng)濟(jì)的高新技術(shù)。特點(diǎn)為耗材,耗電少,無任何環(huán)境污染,是一種**的環(huán)保技術(shù)。目前該技術(shù)已經(jīng)在航天、船舶、**、制造業(yè)、汽車、五金工具、體育器材等行業(yè)中得到廣泛的應(yīng)用。<o:p></o:p> </p> <p class="p" style="margin-left:0pt;text-indent:0pt;line-height:18pt;background:#FFFFFF;"> <a href="http://www.jbwshoes.cn/s04/cryo-asc/yjml/20150601/3375943/1.html" target="_blank">深冷處理設(shè)備</a>引進(jìn)國際上目前***的現(xiàn)代深冷技術(shù)和設(shè)備。我公司所研制的*新設(shè)備其與其他設(shè)備*大不同之處就是可以在同一設(shè)備內(nèi)進(jìn)行深冷和超深冷處理并可以在同一設(shè)備中連續(xù)進(jìn)行+200℃至-196℃之間的冷熱溫度沖擊,使金屬材料部件可以更好的適應(yīng)不同的溫度要求,發(fā)揮深冷處理的*大效應(yīng)。 </p> <p class="p" style="margin-left:0pt;text-indent:0pt;line-height:18pt;background:#FFFFFF;"> &nbsp; </p>

什么是深冷技術(shù)

“深冷處理技術(shù)”或“超深冷處理技術(shù)” (簡稱“深冷技術(shù)”)是近年來興起的一種提高中**金屬工件強(qiáng)度和耐磨性能的新工藝。所謂深冷技術(shù)是利用冷媒介,比如液氮,作為冷卻介質(zhì),將淬火后的金屬材料進(jìn)行深冷或接近**零度的超深冷處理,以改變金屬,以及工程塑料,陶瓷等材料的微細(xì)結(jié)構(gòu),從而提高材料的耐磨性,增加零部件的使用壽命。

金屬部件在淬火后,結(jié)構(gòu)中不穩(wěn)定的奧氏體會(huì)部分轉(zhuǎn)化為較穩(wěn)定的馬氏體.但由于很多**合金的完全轉(zhuǎn)化溫度(Mf)可低達(dá)-200℃, 一般淬火技術(shù)無法實(shí)現(xiàn)結(jié)構(gòu)的完全轉(zhuǎn)變。只有在深冷處理過程中,金屬部件被冷卻到-200℃ 或以下, 才能實(shí)現(xiàn)殘余奧氏體向馬氏體的完全轉(zhuǎn)化。同時(shí)在深冷條件下,亞穩(wěn)定的馬氏體會(huì)降低過飽和度,析出和彌散尺寸僅為20~60 ? 的超微細(xì)碳化物。這些細(xì)小彌散的碳化物在材料塑性變形時(shí)可以阻礙位錯(cuò)運(yùn)動(dòng),從而大大增強(qiáng)金屬部件的抗磨損能力。馬氏體晶格的改變也使金屬部件內(nèi)部微觀應(yīng)力降低,基體組織強(qiáng)化,從而使金屬部件的硬度、抗沖擊韌性和耐磨性都得以顯著提高

深冷技術(shù)不同于其他任何一種傳統(tǒng)表面處理技術(shù)之處,在于深冷技術(shù)引起的結(jié)構(gòu)改變深及工件核心,是一種零部件的整體處理。因此被處理的部件可以反復(fù)磨用而不改變其性能。這種特點(diǎn)也進(jìn)一步數(shù)倍地延長了部件的使用壽命。

深冷技術(shù)在處理金屬部件時(shí)不僅不改變部件尺寸大小,相反,處理過程會(huì)減少淬火產(chǎn)生的內(nèi)應(yīng)力, 從而增強(qiáng)尺寸穩(wěn)定性。

深冷技術(shù)是目前提高金屬材料工件性能*有效,*經(jīng)濟(jì)的高新技術(shù)。特點(diǎn)為耗材,耗電少,無任何環(huán)境污染,是一種**的環(huán)保技術(shù)。目前該技術(shù)已經(jīng)在航天、船舶、**、制造業(yè)、汽車、五金工具、體育器材等行業(yè)中得到廣泛的應(yīng)用。

深冷處理設(shè)備引進(jìn)國際上目前***的現(xiàn)代深冷技術(shù)和設(shè)備。我公司所研制的*新設(shè)備其與其他設(shè)備*大不同之處就是可以在同一設(shè)備內(nèi)進(jìn)行深冷和超深冷處理并可以在同一設(shè)備中連續(xù)進(jìn)行+200℃至-196℃之間的冷熱溫度沖擊,使金屬材料部件可以更好的適應(yīng)不同的溫度要求,發(fā)揮深冷處理的*大效應(yīng)。

 

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