公开(公告)号：US3846188A

公开(公告)日：1974-11-05

申请号：US26150472

申请日：1972-06-09

Applicant: MC DONNELL DOUGLAS CORP

Inventor： WERKEMA R ,  NEWCOMER R

IPC: C22F1/18 ,  C23F1/04

CPC classification number: C22F1/183

Abstract: 1. A TITANIUM ALLOY CAPABLE OF BEING CHEMICALLY PROCESSED IN A SOLUTION CONTAINING HYDROGEN IONS WITHOUT PICKING UP AN EXCESSIVE QUANTITY OF HYDROGEN IONS WITHOUT PICKSISTING ESSENTIALLY OF TITANIUM, ALUMINUM, VANADIUM AND TIN AND BEING KNOWN AS TI-6A1-6V-2SN, SAID ALLOY BEING IN THE BETA OR ALPHA-BETA- PHASES, SAID ALLOY HAVING RELATIVELY LOW STRENGTH AND HIGH DUCTILITY AS A RESULT OF HAVING BEEN ANNEALED BY HEATING TO AT LEAST ABOUT 1300*F. BUT LESS THAN THE SOLUTION TREATING TEMPERATURE AND BY THEREAFTER COOLING RELATIVELY SLOWLY, SAID ALLOY THEREAFTER HAVING BEEN MAINTAINED BETWEEN ABOUT 800*F. AND ABOUT 1000*F. FOR AT LEAST APPROXIMATELY ONE HOUR TO STABILIZE IT AGAINST HYDROGEN PICKUP.