Patent ID: 11920232
Assignee: CENTRAL SOUTH UNIVERSITY
Field: Materials, metallurgy (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A method for preparing a titanium alloy with a gradient microstructure, comprising the following steps:
successively subjecting a metastable β-type titanium alloy forgings to solution treatment, heat preservation treatment and aging treatment to obtain a titanium alloy with a gradient microstructure, wherein
a temperature of the solution treatment is 20-100° C. below the α/β transition temperature of a metastable β-type titanium alloy in the metastable β-type titanium alloy forgings, and a time is 30-120 min;
a temperature of the heat preservation treatment is 30-100° C. above the α/β transition temperature of the metastable β-type titanium alloy, and a holding time is less than or equal to 1.5 min or greater than 1.5 min and less than or equal to 10 min; and timing is started when the temperature of the metastable β-type titanium alloy forgings is raised to the temperature of the heat preservation treatment; and
when the holding time is less than or equal to 1.5 min, the gradient microstructure is a gradient tri-modal microstructure; when the holding time is greater than 1.5 min and less than or equal to 10 min, the gradient microstructure is a gradient lamellar microstructure.