RECRYSTALLIZATION OF TECHNICAL GRADE TITANIUM BY FAST ELECTRICAL HEAT TREATMENT

Journal Article · Sun May 01 04:00:00 EDT 1960 · Izvest. Akad. Nauk S.S.S.R., Otdel. Tekh. Nauk, Met. i Toplivo

OSTI ID:4148461

Ivanov, V I; Osipov, K A

Although during the heat-treatment of technical Ti the surface of the metal becomes covered with gases, causing a lowering of its plastic properties, melting in a vacuum or in protective atmospheres is not practiced. A reduction of the duration of the treatment is relied upon. However, such an action is limited by the highest possible heat transfer from the furnace to the metal and the establishment of the temperature equilibrium within the metal. In view of this, induction heating was used since this type of heating allows a direct and fast conversion of the electric energy into heat. The recrystallization rate of the technical Ti and the effect of the grain growth on the mechanical properties of the metal were studied. In comparing the mechanical properties of specimens heated by conventional and by fast induction heating, it was found that at rates of 100 deg C/sec the beginning and the end of the recrystallization process shifted toward higher temperatures while the hardness remained practically unchanged. Further increases of the rate, up to 600 deg C/sec, did not cause noticeable additional changes. Mechanical properties were not affected very much by the type of heating; but as a result of the reduced grain size, the plasticity was found to be higher after the inductive heat treatment. (TTT)

• Research Organization: Inst. of Metallurgy, Academy of Sciences, USSR
• NSA Number: NSA-14-024604
• OSTI ID: 4148461
• Journal Information: Izvest. Akad. Nauk S.S.S.R., Otdel. Tekh. Nauk, Met. i Toplivo, Journal Name: Izvest. Akad. Nauk S.S.S.R., Otdel. Tekh. Nauk, Met. i Toplivo Vol. Vol: No. 3
• Country of Publication: Country unknown/Code not available
• Language: Russian

Related Subjects

ABSORPTION
EXPANSION
GASES
GRAIN SIZE
HEAT TREATMENTS
HEATING
INDUCTION
INERT GASES
MECHANICAL PROPERTIES
MELTING
METALS, CERAMICS, AND OTHER MATERIALS
RECRYSTALLIZATION
TITANIUM
VACUUM