MANUFACTURING METHODS AND PILOT PRODUCTION OF TITANIUM ALLOY CASTINGS AND REPORTS. Interim Engineering Report No. 1. Phase II: Experimental, September 4 to December 4, 1956

Technical Report · Fri Oct 31 00:00:00 EST 1958

OSTI ID:4349629

Singleton, R H; Torti, M L

ABSTRACTS A total of nine 6 lb heats of pure Ti were poured from a 9-in. diameter tllt pour skull arc furnace into machined graphite molds in an attempt to obtain gas free castings. Pumping in the pressure range below 10 mu while molten and during freezing and subsequent remelting, as well as heating the mold, did not eliminate gas porosity. The vacuum operation of permanent W electrodes was shown to be possible although somewhat difficult. It is suggested that mold reaction or mold gas desorption is a major source of gas porosity. It is recommended that further studies continue to pursue the elimination of gas porositywith major emphasis put on mold material. (auth)

• Research Organization: National Research Corp., Cambridge, Mass.
• DOE Contract Number: AF33(600)-32801
• NSA Number: NSA-12-001390
• OSTI ID: 4349629
• Report Number(s): AD-119840
• Resource Relation: Other Information: Orig. Receipt Date: 31-DEC-58
• Country of Publication: United States
• Language: English

Related Subjects

MINERALOGY, METALLURGY, AND CERAMICS
CASTING
ELECTRIC ARCS
ELECTRODES
FABRICATION
FURNACES
GASES
GRAPHITE
HEATING
LIQUID METALS
POROSITY
PRESSURE
TITANIUM ALLOYS
TUNGSTEN
VACUUM