A kind of tungsten-nickel alloy and its preparation method

Abstract

The invention provides a tungsten-nickel alloy and a preparation method thereof. The tungsten-nickel alloy comprises, by mass, 20-80% of W, 80-20% of Ni, 0-3 % of Ti, 0-4% of Al, 0-10% of Nb and 0-12%of Ta. The preparation method sequentially comprises the following steps of air atomization spraying, powder preparation, hot isostatic pressing and heat treatment. The preparation method of the tungsten-nickel alloy has the advantages that the prepared tungsten-nickel alloy is uniform in structure and short in technological process, complex shapes can be manufactured, raw materials can be saved,the tensile strength of the materials can reach 1000-2100 MPa, the yield strength is 500-1500 MPa, and the elongation rate is 15-60%. The tungsten-nickel alloy prepared by the method is suitable forthe fields such as high-energy ray shielding protection and high-speed kinetic energy weapon, and has good economic and social benefits.

Description

technical field [0001] The invention belongs to the field of refractory metal materials, and relates to a tungsten-nickel alloy and a preparation method thereof. Background technique [0002] High-speed kinetic energy weapons mainly refer to armor-piercing, armor-piercing and ground-penetrating projectiles, which rely on the high density and kinetic energy of projectiles to strike moving or fixed targets. It first appeared in the 1860s, and was mainly used to deal with armored fortifications and ships; in World War I, it began to be used to attack the opponent's tanks and other heavy equipment, generally using high-strength steel and tungsten carbide materials; in the 1970s , using tungsten alloy (mainly tungsten-nickel-iron with certain trace elements added) and depleted uranium alloy as the bullet core, which can penetrate armor with a large inclination angle and composite armor. The kinetic energy of the core and the material properties of the core determine the damage t...

AI Technical Summary

Problems solved by technology

[0006] Tungsten-nickel alloy adopts the traditional casting process, and the general tungsten content can only reach about 30%. If the tungsten content is increased, the melting temperature will increase, the segregation will increase, and the performance of the cast alloy will be low.

Even if it is about 30% casting alloy, tungsten segregation will occur in the casting process. In the subsequent deformation process, the large deformation stress will easily cause cracks and other defects, and the yield rate is low.

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