Corrosion resistant niobium-titanium alloy, and method for manufacturing plates and pipes with the same

A titanium-niobium alloy, corrosion-resistant technology, applied in the field of titanium-niobium alloy, to achieve the effect of expanding the corrosion resistance range, improving work efficiency, and excellent cold working performance

Inactive Publication Date: 2012-10-03
NINGXIA ORIENT TANTALUM IND
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Problems solved by technology

Although domestic and foreign scholars are quite enthusiastic about Ti-Nb alloy research, so far, except for the Ti-45Nb alloy of Huachang Company in the United States, which can produce plate wire and strip, other components of Ti-Nb alloy plates are still blank. Especially heat exchanger grade titanium-niobium alloy plates and tubes are blank at home and abroad

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Embodiment Construction

[0032] The invention discloses a corrosion-resistant titanium-niobium alloy, which is composed of: Nb 0.1-4.9%, C ≤ 0.08%, N ≤ 0.03%, H ≤ 0.012%, O ≤ 0.12%, Fe ≤ 0.1 %, the balance is Ti.

[0033] The invention also discloses a method for preparing a corrosion-resistant titanium-niobium alloy plate, specifically a titanium alloy pipe containing 0.1-4.9% Nb and its manufacturing method:

[0034] The specific process route is: sponge titanium + pure niobium → batching → electrode preparation → two vacuum consumable electric arc furnace melting → peeling → forging → machining → coating → hot rolling → alkali pickling → heat treatment → grinding → cold rolling → pickling → heat treatment → finishing → finished product.

[0035]A titanium alloy plate containing Nb0.1-4.9% (specifically such as 0.5, 1.0, 2.5 and 4.5%), the alloy composition by weight percentage is: Nb2.5%, control C≤0.05%, N≤0.03%, H≤0.012%, O≤0.10%, Fe≤0.15%, single impurity of other elements ≤0.10%, sum of impur...

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Abstract

The invention relates to a corrosion resistant niobium-titanium alloy, and a method for manufacturing plates and pipes with the corrosion resistant niobium-titanium alloy, wherein the corrosion resistant niobium-titanium alloy contains the following components by weight: 0.1-4.9% o Nb, not more than 0.08% of C, not more than 0.03% of N, not more than 0.012% of H, not more than 0.1% of O, not morethan 0.1% of Fe, and the balance of Ti. In Ti-(0.8-6%) Nb alloy pipes disclosed by the invention, titanium is as a matrix; little niobium is added; mechanical property of the niobium is improved by asolid-solution strengthening way; shearing strength and tensile strength of the alloy are higher than pure titanium; the tensile strength is increased by 10-20%; good plasticity and formability are kept; cold working performance is excellent; the niobium is added to further increase corrosion resistance of titanium and enlarge corrosion resistant range of titanium, so that the corrosion resistantniobium-titanium alloy is a good easily-formed corrosion resistant material.

Description

technical field [0001] The invention relates to a corrosion-resistant titanium-niobium alloy and a method for preparing plates and pipes therefrom. Background technique [0002] In order to improve the corrosion resistance of titanium and maintain good comprehensive performance, in the 1970s, Huachang Company of the United States developed a Ti-45Nb alloy, which inherited the properties of Ti and Nb, and its specific gravity and price were lower than pure niobium. The corrosion resistance is equivalent to that of pure niobium, and its corrosion resistance is an order of magnitude higher than that of pure titanium. However, the price and specific gravity of this alloy are much higher than that of pure titanium, and the cost of raw materials alone has increased by about 7 times, so it can only be used in a small number of special environments, such as hydrometallurgy, board system, low-pressure oxidation, etc. Parts with harsh working conditions, as well as aerospace rivets a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C14/00C22F1/18
Inventor 刘彦昌刘守田王培军朱宝辉袁红军任丽萍王益
Owner NINGXIA ORIENT TANTALUM IND
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