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    • 1. 发明授权
    • Overlay welding alloy and engine valve overlayed therewith
    • 叠加焊接合金和发动机阀盖
    • US06248292B1
    • 2001-06-19
    • US09256296
    • 1999-02-24
    • Kimihiko AndoAkio YasudaAkira ManabeEiji Ito
    • Kimihiko AndoAkio YasudaAkira ManabeEiji Ito
    • C22C3844
    • F01L3/04B23K35/3093B23K35/32C22C1/045C22C27/04C22C33/0285C22C38/04C22C38/08C22C38/52
    • An overlaying alloy containing no Cr or a reduced amount of Cr, in which an effective amount of Mo oxide is formed even in a weak oxidizing atmosphere such as a combustion atmosphere of diesel engines and engines using CNG, LPG or other gases as a fuel to provide an improved non-damaging property and wear resistance. An overlaying alloy comprising 20-70 wt % Mo, 0.5-3 wt % C, 5-40 wt % Ni, and the balance being Fe and unavoidable impurities, which contains no Cr to facilitate formation of Mo oxide and is advantageously applied to the parts on which an oxide coating is not easily formed such as the engine parts subject to a lower temperature combustion atmosphere. An overlaying alloy comprising 20-60 wt % Mo, 0.2-3 wt % C, 5-40 wt % Ni, 0.1-10 wt % Cr, and the balance of Fe and unavoidable impurities, which contains a small amount of Cr to control formation of Mo oxide and is advantageously applied to the parts on which an oxide coating is relatively easily formed. Other alloying elements such as Mn, Co, Si, Nb may be added in the alloy in accordance with need.
    • 即使在诸如使用CNG,LPG或其他气体作为燃料的柴油发动机和发动机的燃烧气氛的弱氧化气氛中也形成有效量的Mo氧化物的不含Cr或减少量的Cr的覆盖合金, 提供改进的非破坏性和耐磨性。 包含20-70重量%的Mo,0.5-3重量%的C,5-40重量%的Ni,余量是Fe和不可避免的杂质的叠层合金,其不含Cr以促进Mo氧化物的形成,并且有利地应用于 不容易形成氧化物涂层的部件,例如受到较低温度燃烧气氛的发动机部件。 包含20-60重量%Mo,0.2-3重量%C,5-40重量%Ni,0.1-10重量%Cr,余量为Fe和不可避免的杂质,其含有少量的Cr以控制 形成Mo氧化物,并且有利地施加到氧化物涂层相对容易形成的部分上。 可以根据需要在合金中添加Mn,Co,Si,Nb等其他合金元素。