A large-scale fine-grained tungsten rod and its two-roll rolling preparation method

Abstract

The invention discloses a preparation method of a large-scale fine-grained tungsten rod and a large-scale fine-grained tungsten rod prepared by using the same. The preparation method of the large-scale fine-grained tungsten rod includes the steps of: powder preparation step: selecting tungsten powder, and Sieve to obtain tungsten powder; press forming step: press and form the tungsten powder to obtain a tungsten compact; sintering step: sinter the tungsten compact to obtain a tungsten sintered compact; two-roll rolling step: The tungsten sintered billet is continuously rolled by two rolls to obtain a tungsten rod; the swaging and shaping step: the tungsten rod is cleaned and polished, and then swaged into a circle to obtain a pure tungsten rod; annealing step: the pure tungsten rod is obtained Tungsten rods are annealed to obtain fine-grained tungsten rods. The preparation method of the large-scale fine-grained tungsten rod of the present invention has the advantages of high production efficiency, large amount of deformation, high degree of grain refinement, few human factors, stable product quality and small fluctuations, and the like.

Description

technical field [0001] The invention relates to refractory metal powder metallurgy and deformation processing technology, in particular to a large-scale fine-grained tungsten rod and a two-roll rolling preparation method thereof. Background technique [0002] Metal tungsten is widely used in military industry, automobile, chemical industry, electronics and many other fields due to its excellent properties such as high melting point, high hardness, high density, good high temperature strength, small thermal expansion coefficient and stable chemical properties. However, the rapid technological revolution and product updates in the booming semiconductor industry in the past decade have made it increasingly difficult for ordinary tungsten and molybdenum materials to meet their increasingly demanding industrial production needs. For example, the operating temperature of high-power ion implanters can reach above 2000°C. When the ion beam is erupted, it will produce a huge kinetic ...

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Problems solved by technology

[0005] The present invention aims at the deficiencies and defects of the prior art. One of the purposes of the present invention is to provide a large-scale fine-grained tungsten rod and its two-roll rolling preparation method, which overcomes the high cost, low efficiency, and production process of the current preparation method. The shortcomings of complexity and large fluctuations in product quality solve the problem of uneven grains of tungsten rods and the difficulty of fully guaranteeing fine grains

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