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鍋爐防磨噴涂加工過程中怎么樣重新熔斷

人氣:    發布時間:2021/07/13
鍋爐防磨噴涂加工過程中怎么樣重新熔斷

  一、熱噴涂加工進程中涂層是由熔化狀況熱噴涂粉末粒子通過高壓空氣高速噴向基體,一層一層的十分有規則地疊加形成的不連續結構,在工件基體經過磕碰、變形和凝固等進程后形成一種熱噴涂加工涂層,涂層呈典型的層狀結構。

  

  內部不同程度地存在著空地,從而影響了與金屬基體的結合強度和表面層致密度,因此難以適應較惡劣的環境,這限制了它的應用規模及使用壽命。

  

  熱噴涂加工中重熔技能處理是使用熱源將合金中最易熔化的粒子成分熔化,產生的液相有助于分散進程的強化和成分的滲透,熔化的成果使熱噴加工涂涂層與基體的結合區由本來堆疊的層狀安排變為致密和較均勻的安排,孔隙削減乃至消失。

  

  因此選用恰當的重熔處理,可改進涂層與基體間的結合強度和涂層內在質量,從而提高涂層的耐磨、耐蝕性?,F在,重熔處理技能主要有激光、電子束、TIG重熔、火焰重熔、全體加熱和感應重熔等。


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