A fine-grained high-strength and toughness beta titanium alloy and its manufacturing method
A beta titanium alloy and titanium alloy technology, applied in the field of fine-grained, high-strength and tough beta-titanium alloy and its production, can solve the problems of low strength-plasticity-toughness matching, low plasticity and toughness, and use, etc. The effect of high plasticity-toughness matching performance
Inactive Publication Date: 2017-08-04
TAIYUAN UNIV OF TECH
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Problems solved by technology
As far as the country is concerned, although the research and application of high-strength titanium alloys are relatively early, and many brands of high-strength β-titanium alloys have been developed, most of the domestic high-strength β-titanium alloys are imitations of foreign alloys.
The main problem facing the current research and development of high-strength titanium alloys is that their strength-plasticity-toughness matching is low, that is, the plasticity and toughness at high strength levels are so low that they cannot be used at this strength level, which is a serious limitation. The development and application of high-strength titanium alloy
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[0014] The fine-grained high-strength and toughness beta titanium alloy in this embodiment is a high-strength and toughness titanium alloy Ti-4Al-1Sn-2Zr-5Mo-8V-2.5Cr, with grains smaller than 3 microns.
[0015] Its preparation method is as follows:
[0016] Step 1. Weigh the raw materials, respectively weigh sponge titanium, pure aluminum, pure chromium, pure tin, pure zirconium, aluminum molybdenum alloy (Mo content 73.01%) and aluminum vanadium alloy (V content 83.06%) in total 18000g as Raw materials, so that in the total mass, according to the mass percentage, it is 4% Al, 5% Mo, 8% V, 2.5% Cr, 1% Sn, 2% Zr, the balance is Ti and unavoidable impurities;
[0017] Step two,
[0018] Melting ingots: adding sponge titanium, pure aluminum, pure chromium, pure tin, pure zirconium, aluminum-molybdenum alloys and aluminum-vanadium alloys weighed in step 1 into a vacuum induction magnetic levitation melting furnace for melting, and then cooling with the furnace to obtain ingots...
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Abstract
The invention relates to the field of titanium alloys, in particular to a fine grain high-strength and high-toughness beta titanium alloy and a manufacturing method thereof. The fine grain high-strength and high-toughness beta titanium alloy comprises the following elements in percentage by mass: 3.0-7.0% of Al, 4-9% of Mo, 7-9% of V, 2-5% of Cr, 0.5-1% of Sn, 1-3% of Zr, and the balance of Ti and inevitable impurity elements; and grains of the titanium alloy are less than 3 microns. The invention further discloses the manufacturing method of the titanium alloy. The fine grain high-strength and high-toughness beta titanium alloy is an alloy with close grains, mixed with vein stripes and with high strength, high plasticity, high toughness and high comprehensive performance.
Description
technical field [0001] The invention relates to the field of titanium alloys, in particular to a fine-grained high-strength and tough beta titanium alloy and a manufacturing method thereof. Background technique [0002] With the leapfrog development of a new generation of advanced weapons in the direction of high speed, large size, and complex structure, titanium alloy structural materials are required to have high specific strength, high specific stiffness, high toughness, high damage tolerance, and weldability. comprehensive performance matching. In addition, the load-bearing components and load-bearing bolts and other fasteners of aerospace, weapons, ships and other weaponry have put forward clear requirements for high-strength titanium alloys and ultra-high-strength titanium alloys. Therefore, ultra-high-strength titanium alloy (Rm ≥ 1250MPa) has become one of the key supporting materials for the development of a new generation of weapons and equipment, and is one of th...
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IPC IPC(8): C22C14/00C22C1/02C22F1/18
CPCC22C1/02C22C14/00C22F1/183
Inventor 张长江张树志吕智丹张佳欣王怡陈瑞梅
Owner TAIYUAN UNIV OF TECH