Chemical milling of titanium,refractory metals and their alloys
Abstract
Abstract A PROCESS OF CHEMICALLY MILLING TITANIUM, REFRACTORY METALS, AND THEIR ALLOYS, RESULTING IN DECREASED ABSORPTION OF HYDROGEN, THUS ALLOWING CHEMICAL MILLING OF BETA TITANIUM AND ALPHA BETA TITANIUM, WHICH NORMALLY CANNOT BE CHEMICALLY MILLED IN CONVENTIONAL CHEMICAL MILLING SOLUTIONS BECAUSE OF HYDROGEN EMBRITTLEMENT. ANOTHER ADVANTAGE OF THIS PROCESS IS A BETTER CHEMICALLY MILLED SUR FACE FINISH AND MORE RAPID AND UNIFORM METAL REMOVAL RATES THAN OBTAINABLE IN CONVENTIONAL REFRACTORY METAL CHEMICAL MILLING SOLUTIONS. THE PROCESS ALSO IS SUITABLE FOR ALPHA TITANIUM ALLOYS. THE CHEMICAL MILLING SOLUTIONS ITSELF CONSISTS OF A MIXTURE OF NITRIC ACID, HYDROFLUORIC ACID OR FLUORIDE SALTS AND DERIVATIVES OF CARBONIC ACID SUCH AS CARBAMIDE, IN CONCENTRATIONS OF AT LEAST 10 GRAMS PER LITER OF FINAL SOLUTION.
Inventors
- 👤 J Gumbelevicius
Bibliographic Details
Claims Analysis
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