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    • 100. 发明公开
    • NITRIDED Mo ALLOY WORKED MATERIAL HAVING HIGH CORROSION RESISTANCE, HIGH STRENGTH AND HIGH TOUGHNESS AND METHOD FOR PRODUCTION THEREOF
    • 氮化钼合金材料,具有高耐腐蚀性能,用于生产高和高韧性和强度过程
    • EP1491651A1
    • 2004-12-29
    • EP03745433.7
    • 2003-03-27
    • Japan Science and Technology AgencyNational University Corporation Okayama UniversityA.L.M.T. CORP.
    • Takada, JunNagae, MasahiroNakanishi, MakotoTakida, Tomohiro
    • C23C8/24C22C27/04
    • C22C27/04C23C8/02C23C8/24C23C26/00
    • The present invention provides an innovative material which has properties which cannot be achieved with conventional materials, i.e., having satisfactory high corrosion resistance and high strength in very severe corrosive conditions, for example, a 75% sulfuric acid (H 2 SO 4 ) aqueous solution (180°C) in addition to high strength at high temperatures and high toughness at low temperatures, and provides a method for effectively manufacturing the innovative material.
      A worked molybdenum-alloy material, subjected to nitriding, which has high corrosion resistance, high strength, and high toughness, includes fine nitride particles formed by subjecting a nitride-forming-metal element dissolved to form a solid solution in an untreated worked molybdenum-alloy material to internal nitriding, the fine nitride particles being dispersed inside the worked molybdenum-alloy material subjected to nitriding; and a molybdenum nitride layer formed by subjecting a worked structure or a recovered structure at the surface of the untreated worked molybdenum-alloy material to external nitriding, the molybdenum nitride layer being provided at the surface of the worked molybdenum-alloy material subjected to nitriding. A method for manufacturing a worked molybdenum-alloy material subjected to nitriding includes the steps of subjecting an untreated worked alloy material in which at least any one of titanium, zirconium, hafnium, vanadium, niobium, and tantalum is dissolved to form a solid solution to multi-step internal nitriding treatment including a stepwise increase of the treatment temperature, and then subjecting the worked alloy material to external nitriding treatment.
    • 氮化钼合金加工材料(1)包括基钼合金制作在表面上形成材料和氮化钼层(4)。 所述基材含有工作通过氮化的金属元素存在内部的材料加工形成的微细的氮化物粒子(2)。 氮化物层是由氮化加工组织或回收的结构形成。