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熱噴涂技術和冷噴涂技術的區別

日期:2019-11-07 15:08 人氣:
    熱噴涂技術是表面工程領域中十分重要的技術,約占表面工程技術的1/3。熱噴涂技術是利用不同的熱源和噴涂設備,將某種線材或粉末狀的材料加熱至熔化或半熔化狀態,并加速形成高速熔滴,噴向基體表面上形成具有希望性能的膜層,從而達到對基體表面改質目的的表面處理技術。這種覆蓋層稱為噴涂層。由于熱噴涂涂層具有特殊的層狀結構和若干微小氣孔,涂層與底材的結合一般是機械方式,其結合強度較低。在很多情況下,熱噴涂可以引起相變、部分元素的分解和揮發以及部分元素的氧化。常見的熱噴涂涂層功能有防腐、耐磨、不粘、抗高溫、耐氧化、隔熱、絕緣、超導和遮蔽等。
    冷噴涂技術是相對于熱噴涂技術而言,在噴涂時,噴涂粒子以高速(500~1000m/s)撞擊基體表面,其過程是高壓氣體經過一定低溫預熱(一般低于600℃)通過縮放噴管產生超音速氣體射流,將噴涂粒子從軸向送入氣體射流中加速,粒子以固定的形式撞擊基體形成涂層。這整個過程中粒子沒有熔化,保持固體狀態。冷噴涂技術可獲得低氧化物含量、低內應力、高硬度、大厚度涂層。
    我公司擁有先進的噴涂設備,豐富的噴涂經驗,技術力量雄厚,施工能力強,歡迎廣大客戶致電咨詢,服務熱線:400-0708-056。
    本文由信息部張忠霞搜集整理
熱噴涂技術和冷噴涂技術的區別

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