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

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...