Gel Prepared Tungsten Copper Alloy Powder

In this paper, the sol-gel method combined with a spray-drying method series of ultra-fine tungsten copper composite powder, the powder through the different composition, size and other performance standards, different green powder sintering behavior under liquid phase conditions research and analysis by testing the sintered microstructure and physical and mechanical, thermal, electrical properties, the influence of the preparation method and process conditions on the powder properties and the final W-Cu composite material properties, so as to prepare a high density of W-Cu composites were useful to explore and try.

By powder on microstructure and properties of comparative analysis, we found the following preparation process using tungsten-copper composite powder series ideal performance: After paratungstic acid and copper nitrate according to a certain percentage of a beaker with a good, adding a certain amount of citric acid After stirring at room temperature at 30 ℃ dissolve, then add a certain amount of stearic acid as a surfactant, was heated to 80 ℃ stirring, when it becomes a gel by spray drying tower and dried: and then calcined at 600 ℃ 4 hours ; then reduced at 800 ℃. The powder series have in common is: particle size were between 0.1um-1um: powder particle shape is more structured, are spherical shape; powder due to the small particle size, surface activity, leading to more serious powder agglomeration.

Tungsten Copper Wear Resistance

Tungsten copper wear resistance nano-powder materials were milled, depending on the ratio of copper powder mixed 2_4h, first at the bottom of the prepared graphite mold Xianpu ー about O. 5_ thick layer of pure nano-tungsten-copper resistant materials and then mixed in different proportions holes and pure copper powder powder, copper content increased, the thickness of about I. 5mm, the surface layer of about O. 5mm holes and ー thick pure copper powder. The die set installed hot powder sintering furnace, sintering Eito Arts Figure I shows. The sintering resistant materials combined with copper to form functionally graded materials clean copper surface, the wind ro casting process is placed in Zhu type, embedded directly in the casting process cast in the wind ro sleeve ring surface, so resistant materials combined with wind copper metallurgy between the substrate and the implementation.

A high temperature tungsten copper wear resistance material for a lining of a blast-furnace tuyere sleeve, which is prepared by the following raw materials in percentage by weight: 40-60% of nano copper powder, 36-56% of nano tungsten powder, 0.2-0.65% of iron powder and 4-6% of chromium powder. Metal conducts plastic deformation and is molten and diffused at high temperature and high pressure and by the aging effect at the high temperature and the high pressure, so that the high-temperature wear-resistant tungsten copper material is obtained. The high temperature wear resistance  material of tungsten copper is good in heat-conducting property, high-temperature strength and high-temperature wear-resistant property, can realize metallurgical bonding with a fine copper substrate, and can be used for manufacturing the lining of the blast-furnace tuyere sleeve, which is good in wear-resistant property and long in service life; the wear-resistant property of the blast-furnace tuyere sleeve can be improved greatly; and the service life of the blast-furnace tuyere sleeve can be prolonged greatly.