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    • 5. 发明申请
    • THERMAL SPRAY COATINGS AND APPLICATIONS THEREFOR
    • 热喷涂及其应用
    • WO2008101164A2
    • 2008-08-21
    • PCT/US2008/054092
    • 2008-02-15
    • PRAXAIR S.T. TECHNOLOGY, INC.APTE, Prasad, ShrikrismnaMEAGHER, James, PatrickCALLAHAN, Shawn, W.
    • APTE, Prasad, ShrikrismnaMEAGHER, James, PatrickCALLAHAN, Shawn, W.
    • C23C4/08C23C28/00C22C19/00
    • C23C4/02C22C19/05C22C19/058C23C4/073C23C28/321C23C28/3215C23C28/34C23C28/341C23C28/345C23C28/3455C23C28/36Y10T428/12618Y10T428/12931Y10T428/24355Y10T428/24413Y10T428/24612Y10T428/249969Y10T428/256
    • This invention relates to coatings for a metal or non-metal substrate comprising (i) a thermal sprayed bondcoat layer applied to said substrate comprising an alloy of MCrAlM' wherein M is an element selected from nickel, cobalt, iron and mixtures thereof, and M' is an element selected from yttrium, zirconium, hafnium, ytterbium and mixtures thereof, and wherein M comprises from about 35 to about 80 weight percent of said alloy, Cr comprises from about 15 to about 45 weight percent of said alloy, Al comprises from about 5 to about 30 weight percent of said alloy, and M' comprises from about 0.01 to about 1.0 weight percent of said alloy, said alloy thermally sprayed from a powder having a mean particle size of 50 percentile point in distribution of from about 5 microns to about 100 microns, said bondcoat having a surface roughness of at least 200 micro-inches, and said bondcoat having a thermal expansion of about 6.5 millimeters per meter or less between a temperature of from about 25°C to about 525°C, and (ii) a thermal sprayed ceramic layer applied to said bondcoat layer; wherein said coating has a helium leak rate of less than 6 x 10"6 standard cubic centimeters per second. The coatings are useful for extending the service life under severe conditions, such as those associated with metallurgical vessels' lances, nozzles and tuyeres.
    • 本发明涉及一种用于金属或非金属基底的涂层,其包括(i)施加到所述基底上的热喷涂粘合涂层,其包含MCrAlM'的合金,其中M是选自镍,钴,铁及其混合物的元素,M “是选自钇,锆,铪,镱及其混合物的元素,其中M包括约35至约80重量%的所述合金,Cr包含约15至约45重量%的所述合金,Al包括 约5至约30重量%的所述合金,并且M'包含约0.01至约1.0重量%的所述合金,所述合金由平均粒度为50百分点的粉末热分散从约5微米 至约100微米,所述粘合涂层具有至少200微英寸的表面粗糙度,并且所述粘结涂层在约25℃的温度下具有约6.5毫米/米或更小的热膨胀 (ii)施加到所述粘结涂层的热喷涂陶瓷层; 其中所述涂层具有小于6×10 -6标准立方厘米/秒的氦泄漏率。涂层可用于在苛刻条件下延长使用寿命,例如与冶金容器喷枪,喷嘴和风口相关的使用寿命。