Abstract
The invention provides a method for preparing titanium alloy spherical powder at all levels. The method comprises the steps that cylinder electrode bars are made of titanium alloy; the cylinder electrode bars are made into powder through a plasma rotating electrode powder manufacturing device, low-temperature argon is blown into a vacuum furnace in the process of condensation and flying of the powder, the powder is cooled rapidly and solidified so that the temperature of the powder can be lowered to the room temperature rapidly, and therefore titanium alloy powder is obtained; the titanium alloy powder is screened through a powder screening device, and then the all levels of titanium alloy spherical powder with the granularity ranging from 40 micrometers to 200 micrometers can be obtained. According to the method for preparing the titanium alloy spherical powder at all levels, the powder is prepared through the plasma rotating electrode powder manufacturing device, and the low-temperature argon is blown into the powder in the process of condensation and flying of the powder so that the powder can be cooled rapidly and solidified and the temperature of the powder can be lowered to the room temperature; as a result, the titanium alloy spherical powder which is identical in particular size, good in sphericity degree, smooth in surface, free of cracks and good in mobility is obtained; in the process of screening, inert gas shielding is adopted, the content of impurity elements including O, H and N in the titanium alloy spherical powder is smaller than 1000 ppm, as a result, the ductility of a powder sintered metal product is effectively improved, and the compression performance and the sintering character of the powder are improved.
Description
Technical field
[0001] The invention belongs to the technical field of powder metallurgy industry and relates to a method for preparing titanium alloy spherical powders of various levels. Background technique
[0002] Obtaining high-quality and low-cost titanium alloy spherical powders at all levels is a key link in meeting special forming processes such as hot isostatic pressing and preparing high-performance titanium alloy components. At present, the inert gas atomization method and the plasma rotating electrode method are the two most widely used advanced processes for preparing high-quality titanium alloy spherical powders. The preparation of spherical powder by the gas atomization method will inevitably produce some hollow powder, and this internal void cannot be removed during the subsequent powder metallurgy preparation of titanium alloy materials, thereby forming internal defects of the material. The plasma rotating electrode method has high powder production efficiency ...
