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首页> 美国政府科技报告 >Development of Titanium Alloy Casting Technology.
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Development of Titanium Alloy Casting Technology.

机译：钛合金铸造技术的发展。

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This program was conducted to develop the technologies necessary to establish a low-cost approach for producing titanium investment castings. This approach was based on using simpler and cheaper melting and casting techniques,common to steel and super-alloy investment foundries,for producing high-quality,low-cost titanium castings. Program objective included: (1) development of a low-melting titanium alloy displaying adequate tensile properties, (2) development of low reactivity ceramics for use in melting crucibles and investment mold facecoats, (3) establishing an induction melting and vacuum casting capability using the above technologies. Alloy investigations conducted,by RMI Company,evaluated eight binary titanium alloy systems. Low melting alloys from the titanium-copper system displayed the greatest potential with the Ti-13Cu composition being selected as a base alloy for further work. Several Ti-13Cu base alloys exhibited an attractive combination of mechanical properties,heat treatment response and melting temperature. A titanium modified yttria material (Y2O3.15Ti) was developed for melting crucible applications. The concept of producing titanium castings using low-melting alloys,vacuum induction melting in a ceramic crucible,and low-reactivity investment molds,was successfully demonstrated,and offers the potential for further production of low-cost,high-quality,titanium castings.

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