TC4 titanium alloy plate machining method

Abstract

The invention discloses a TC4 titanium alloy plate machining method. The method includes the following steps that firstly, sponge titanium, aluminum powder, vanadium powder and iron powder are mixed according to the mass percent and extruded to form titanium blank, and then the titanium blank is welded, smelted and scalped to form a titanium ingot; secondly, cogging and forging are carried out on the titanium ingot to form a titanium slab, and then a smooth titanium slab with the thickness being smaller than or equal to 100 mm is formed through sawing and milling; thirdly, the smooth titanium slab is hot-rolled and ground at least three times after hot rolling to form a titanium plate with the thickness being smaller than or equal to 2 mm, annealing is conducted at the temperature of 800 DEG C, and heat is preserved for 0.8-1.2 hours to form a smooth titanium plate without cracks; and fourthly, cold rolling is conducted, and the smooth titanium plate is cold-rolled into the titanium plate with the thickness being smaller than or equal to 0.4 mm under at least three times of different annealing temperature conditions. The method reduces oxide skin formed during heating, has the advantages of being good in corrosion resistance, small in density, high in specific strength and good in toughness and welding performance, and is widely used in aerospace, petrifaction, shipbuilding and the automobile industry.

Description

technical field [0001] The invention belongs to the technical field of metal material processing, relates to titanium alloy processing, in particular to a TC 4 Alloy plate processing method. Background technique [0002] People take advantage of the high strength and strong corrosion resistance of titanium plates to use titanium plates in heat exchanger components, camera bodies, kitchen equipment and other civilian products, motorcycles, automobiles and other transportation machinery components, and home appliances and other exterior materials. With the improvement of people's quality of life, plate heat exchangers with high heat exchange efficiency are becoming more and more widely used. However, if high heat exchange efficiency is to be satisfied, it must be processed into a corrugated shape by extrusion to increase the surface area. Therefore, the processing of titanium plates into components of various products has higher requirements for their formability and cleanin...

AI Technical Summary

Problems solved by technology

The rolling temperature of this method is between 450°C and 1150°C, and it is easy to react with air to form TiO 2 and Ti 2 o 3 A large part of these two compounds penetrate directly into the surface of titanium, with a depth of up to 2 mm. The damage caused by this pollution to the product is that obvious and wide cracks occur on the surface of the titanium slab during the rolling process. The depth of the board reaches 2mm to 3mm, and 30% of the entire board surface has this situation, resulting in a serious decline in product quality

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