High-temperature anti-oxidation layer on metal tungsten surface and manufacturing method of high-temperature anti-oxidation layer

Abstract

The invention discloses a manufacturing method of a high-temperature anti-oxidation layer on the metal tungsten surface. The manufacturing method includes the steps that a metal tungsten base material is polished till the surface is smooth and level, and deoiling and degreasing treatment is conducted on the polished surface; the treated metal tungsten base material is soaked into a molybdenum seeping agent and then subjected to heat treatment in the inertia atmosphere, impurities are removed after cooling, and a semi-finished product with a tungsten and molybdenum solid solution layer on the metal tungsten surface is obtained; the semi-finished product is placed in the nitrogen atmosphere to be subjected to heat treatment, impurities are removed after cooling, and a prefabricated body with a molybdenum nitride and tungsten nitride coating on the metal tungsten surface is obtained; the prefabricated body is soaked into a silicification seeping agent to be subjected to heat treatment in the inertia atmosphere, impurities are removed after cooling, and a finished product with W-Mo-N-Si high-temperature anti-oxidation layer on the metal tungsten base material surface is obtained. The invention further relates to the high-temperature anti-oxidation layer obtained through the method and used on the metal tungsten surface.

Description

technical field [0001] The invention relates to a high-temperature anti-oxidation layer on the surface of metal tungsten and a preparation method thereof. Background technique [0002] High-density tungsten-based materials are widely used in the fields of national defense and military industry, machinery and electronics, aerospace, metallurgy and mining, petroleum and coal, clocks and accessories. Uncoated tungsten materials have defects such as non-wear resistance, poor oxidation resistance, perspiration corrosion, and dull color. [0003] CN101195285 discloses a coated tungsten material, including a tungsten substrate, on which the tungsten substrate is coated with TiN or Cu (balance)-(15-45)%Zn-(0.1- 1.5)%Ni-(0.5-1)%Al 2 o 3 alloy coating. The coated tungsten material can effectively improve the comprehensive performance of the surface of the tungsten-based material, such as oxidation resistance, wear resistance, sweat corrosion resistance, and bright color, under the...

AI Technical Summary

Problems solved by technology

However, the coated tungsten material is obtained by using CVD or PVD methods, the preparation process is relatively complicated, the production cost is high, and there are poor compactness of the coating, poor thermal matching between the coating and the substrate, and difficulty in controlling the thermal stability of the coating. Problems such as structure and phase state directly affect the high-temperature service life of metal tungsten

Du Zhiqiang used the electroplating process to obtain coatings on tungsten-based powder metallurgy materials. The process was electrolytic degreasing-cyanide copper plating-bright copper plating-bright nickel plating, but the bonding force between the parts and the coating was still not high, and corrosion was found on the edges of the parts Phenomenon, the thickness of the coating is uneven, and the corrosion resistance is not up to the use standard.