Method for preparing high-melting-point metal powder through multistage depth reduction

• Main Authors: ZHANG ZIMU, LIU YAN, NIU LIPING, FU DAXUE, ZHAO QIUYUE, ZHANG TING'AN, FAN SHIGANG, DOU ZHIHE, ZHANG WEIGUANG, LYU GUOZHI
• Format: Patent
• Language: Chinese; English
• Published: 10.10.2017
• Subjects: CASTING; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; MAKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; METALLURGY; PERFORMING OPERATIONS; POWDER METALLURGY; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS; WORKING METALLIC POWDER

The invention discloses a method for preparing high-melting-point metal powder through multistage depth reduction, and belongs to the technical field of powder preparing. The method comprises the steps that dried high-melting-point metallic oxide powder and magnesium powder are mixed and then subject to the self-propagating reaction, and high-melting-point metal Me is one or several of W, Mo, Ta, Nb, V, Zr, Hf or Re; intermediate products are placed in a seal reaction kettle, hydrochloric acid serves as a leaching agent to carry out leaching, and low-valence oxide MexO precursor of low-valence high-melting-point metal is obtained; the precursor is evenly mixed with calcium powder to be pressed, a mixture is placed in a vacuum reduction furnace, heating is carried out to enable the temperature to rise to 700 DEG C to 1200 DEG C, deep reduction is carried out for 1 h to 6 h, hydrochloric acid serves as the leaching agent to carry out leaching on a deep reduction product, and through treatment, high-melting-poin