Titanium based product and method for manufacturing the same

Abstract

A method for manufacturing a titanium based product includes the following steps. The first step is providing a titanium hydride ingot. The next step is pre-sintering the titanium hydride ingot to dehydrogenate the titanium hydride ingot according to a first temperature control mode, so as to form a titanium ingot. The next step is machining the titanium ingot to form a titanium semi-product having a desired shape. The last step is post-sintering the titanium semi-product according to a second temperature control mode that is different from the first temperature control mode, so as to form the titanium based product.

What is claimed is: 
     
         1 . A method for manufacturing a titanium based product, comprising:
 providing a titanium hydride ingot;   pre-sintering the titanium hydride ingot to dehydrogenate the titanium hydride ingot according to a first temperature control mode, so as to form a titanium ingot;   machining the titanium ingot to form a titanium semi-product having a desired shape; and   post-sintering the titanium semi-product according to a second temperature control mode that is different from the first temperature control mode, so as to form the titanium based product.   
     
     
         2 . The method according to  claim 1 , further comprising modifying an appearance of the titanium based product after the step of post-sintering the titanium semi-product. 
     
     
         3 . The method according to  claim 2 , further comprising precisely machining the modified titanium based product after the step of modifying the appearance of the titanium based product. 
     
     
         4 . The method according to  claim 1 , wherein the step of providing the titanium hydride ingot includes dry-pressing a titanium hydride powder to form the titanium hydride ingot. 
     
     
         5 . The method according to  claim 1 , wherein the first temperature control mode is gradually increasing a pre-sintering temperature up to 800-900° C. at a predetermined heating rate and then maintaining the pre-sintering temperature for 3 hours. 
     
     
         6 . The method according to  claim 5 , wherein the second temperature control mode is gradually increasing a post-sintering temperature up to 1200-1300° C. at the predetermined heating rate and then maintaining the post-sintering temperature for 3 hours. 
     
     
         7 . The method according to  claim 6 , wherein the predetermined heating rate is 5° C./min. 
     
     
         8 . The method according to  claim 1 , wherein the titanium ingot has a line shrinkage rate between 6% and 9% with respect to the titanium hydride ingot, and the titanium based product has a line shrinkage rate between 13% and 16% with respect to the titanium hydride ingot. 
     
     
         9 . The method according to  claim 1 , wherein the titanium ingot has a density between 3.5 g/cm 3  and 4.1 g/cm 3 , and the titanium based product has a density of 4.45 g/cm 3 . 
     
     
         10 . The method according to  claim 1 , wherein the titanium ingot has a porosity between 15% and 20%, and the titanium based product has a porosity of 0.4%. 
     
     
         11 . The method according to  claim 1 , wherein the titanium ingot has a Vickers hardness between 90 HV and 110 HV, and the titanium based product has a Vickers hardness between 200 HV and 250 HV. 
     
     
         12 . A titanium based product manufactured by the method according to  claim 1 , the titanium based product having a Vickers hardness between 200 HV and 250 HV, a tensile strength between 600 MPa and 650 MPa, and a yield strength between 500 MPa and 550 MPa.