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    • 4. 发明申请
    • LOW SULFUR NICKEL-BASE SINGLE CRYSTAL SUPERALLOY WITH PPM ADDITIONS OF LANTHANUM AND YTTRIUM
    • 低硫镍基单晶超级合金与PPM添加剂
    • US20120034127A1
    • 2012-02-09
    • US12851111
    • 2010-08-05
    • Kenneth Harris
    • Kenneth Harris
    • C22C19/05
    • C22C19/057
    • A single crystal casting having substantially improved high-temperature oxidation resistance, hot corrosion (sulfidation) resistance, and resistance to creep under high temperature and high stress is characterized by an as-cast composition comprising a maximum sulfur content of 0.5 ppm by weight, a maximum phosphorus content of 20 ppm by weight, a maximum nitrogen content of 3 ppm by weight, a maximum oxygen content of 3 ppm by weight, and a combined yttrium and lanthanum content of 5-80 pm by weight. It has been discovered that careful control of the deleterious impurities, particularly sulfur, phosphorus, nitrogen and oxygen, in combination with a carefully controlled addition of yttrium and/or lanthanum provides unexpected improvements in corrosion and oxidation resistance, while also enhancing high-temperature, high-stress resistance to creep, without any detrimental effects on other mechanical properties, processing or producability, particularly castability.
    • 具有显着提高的高温抗氧化性,耐热腐蚀(耐硫化)性,耐高温和高应力下的蠕变性的单晶铸件的特征在于包含最大硫含量为0.5重量ppm的铸态组合物, 最大磷含量为20重量ppm,最大氮含量为3重量ppm,最大氧含量为3重量ppm,组合钇和镧含量为5-80微米。 已经发现,仔细控制有害杂质,特别是硫,磷,氮和氧,结合仔细控制的钇和/或镧添加,提供了耐腐蚀和抗氧化性的意想不到的改进,同时还提高了高温, 高应力耐蠕变性,对其他机械性能,加工或可生产性,特别是浇注性没有任何不利影响。
    • 7. 发明授权
    • Nickel-base superalloy for high temperature, high strain application
    • 镍基超级合金用于高温,高应变应用
    • US06632299B1
    • 2003-10-14
    • US09692750
    • 2000-10-19
    • Kenneth Harris
    • Kenneth Harris
    • C22C1905
    • C22C19/057
    • A nickel-base superalloy that exhibits outstanding mechanical properties under high temperature and high strain conditions when cast in an equiaxed and/or directionally solidified, columnar grain structure, and which exhibits increased grain boundary strength and ductility while maintaining microstructural stability includes, in percentages by weight, 5-6 chromium, 9-9.5 cobalt, 0.3-0.7 molybdenum, 8-9 tungsten, 5.9-6.3 tantalum, 0.05-0.25 titanium, 5.6-6.0 aluminum, 2.8-3.1 rhenium, 1.1-1.8 hafnium, 0.10-0.12 carbon, 0.010-0.024 boron, 0.011-0.020 zirconium, with the balance being nickel and incidental impurities. The superalloys of this invention are useful for casting gas turbine engine components exhibiting significantly improved low cycle fatigue life, improved airfoil high temperature stress rupture life, significantly reduced life cycle cost, and longer useful life.
    • 当在等轴和/或定向凝固的柱状晶粒结构中铸造时,在高温和高应变条件下表现出优异的机械性能并且在保持微观结构稳定性的同时显示出增加的晶界强度和延展性的镍基超级合金包括以百分比表示 重量,5-6铬,9-9.5钴,0.3-0.7钼,8-9钨,5.9-6.3钽,0.05-0.25钛,5.6-6.0铝,2.8-3.1铼,1.1-1.8铪,0.10-0.12 碳,0.010-0.024硼,0.011-0.020锆,余量为镍和偶然杂质。 本发明的超级合金可用于铸造燃料涡轮发动机部件,其显示出显着改善的低循环疲劳寿命,改进的翼型件高温应力断裂寿命,显着降低的寿命周期成本和更长的使用寿命。