Tantalum is a rare and precious non-ferrous metal, used in acid resistant equipment of chemical and chemical fiber industry, and can be made into tantalum spinneret for spinning production in chemical fiber factory.
According to this situation, ion electroplating technology was used to generate 4μm thick silver gray lithium ion film on the tantalum spinneret.
This layer consists of a osmotic affinity binding layer and an ion membrane layer, whose structure is as follows: The tantalum spinneret matrix is combined with the permeation affinity layer and the lithium ion film is permeated into the tantalum spinneret matrix at a depth of 50μm ~ 60μm. The permeation affinity layer is then combined with the lithium ion film.
Methods to improve hardness and strength are: low vacuum thermal oxidation treatment; Chemical deposition; Anodic oxidation; Physical processing; Vacuum nitrogen absorption treatment. However, the results are not ideal, hardness can only reach HV300, tensile strength is only 55 kg/mm2, can not meet the actual requirements of production, so as to cause waste of raw materials, equipment service life is short, reduce the production effect.
The purpose of the utility model is to provide a lithium ion film layer to be applied on the tantalum spinneret head, which can effectively improve the hardness and strength of the tantalum spinneret and make the tantalum spinneret have the properties of resistance to deformation, wear and corrosion.
It is characterized by permeation bonding between tantalum matrix and lithium ion permeation bonding layer, and lithium ion permeation bonding layer and lithium ion membrane. The combination of the osmotic affinity layer and the tantalum spinneret matrix penetrates lithium ions into the tantalum spinneret matrix at a depth of 50μm ~ 60μm. The li-ion permeation-affinity binding layer is tightly bound to the li-ion membrane and never falls off. The thickness of the li-ion membrane is 4μm and the color is silver-gray. Hardness is HV700 ~ 815, tensile strength is 115 kg/mm2.
The purpose of the utility model is to realize that the hardness and strength of the tantalum nozzle cannot be greatly improved due to the poor affinity and bonding force of the various processing methods currently adopted. In view of this situation, according to the chemical reaction between the elemental properties of tantalum and ions, the principle of ion reaction is adopted. A solid and hard coating layer with thickness of 4μm and color of silver gray was prepared on the surface of tantalum spinneret by means of electrolysis.
