Low-density high-strength niobium alloy bar and preparing method thereof

• Main Authors: CAI XIAOMEI, XUE JIANRONG, BAI RUN, XIA MINGXING, LIU HUI, WANG FENG, WANG HUI, ZHENG XIN
• Format: Patent
• Language: Chinese; English
• Published: 01.03.2019
• Subjects: ALLOYS; CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses a low-density high-strength niobium alloy bar. The low-density high-strength niobium alloy bar is formed by Ti, Al, W, Cr, Zr, Mo, Y and Nb, the density of the niobium alloy bar is 6.5-7.0 g/cm 3 , and the tensile strength at room temperature is 900-1200 MPa. The invention further discloses a preparing method of the low-density high-strength niobium alloy bar. The preparingmethod comprises the steps of 1, pressing, installing and welding consumable electrodes; 2, conducting vacuum consumable smelting to obtain niobium alloy ingots; 3, conducting hot isostatic pressingtreatment; 4, conducting extruding to obtain a niobium alloy bar blank; 5, conducting heating and calcining and obtaining the niobium alloy bar. The niobium alloy bar contains low-melting-point metaland high-meting-point metal separately, and thus the low density and the high density are guaranteed; according to the preparing method, the hot isostatic pressing treatment is adopted to overcome thedefects of micro-segregatio