日本金属学会誌

J. Japan Inst. Metals, Vol. 14, No. 3 (1950),
pp. 74-77

Studies on the Forgibility of Complex Light Alloys

Takuichi Morinaga, Shôshi Ikeno


Abstract:

The studies were made to obtain a general information regarding the forgibility of complex light alloys (See Table 1). The relation between the forging temperature, speed and composition was examined by means of the Universal Testing Machine. The best condition was found for the forging temperature to be from 350° to 450° and the velocity from 5 to 100 mm/min.The results obtained may be summerised as follows:
(1) The forgibility of the alloys was examined under two different conditions, viz,, chill cast and forged-annealed and found that the latter is superior to the former in forgibility. (2) The resistance to deformation and yielding point are remarkably affected by the forging temperature and speed. The best condition is recorded when the former is from 350° up to 450° and the latter is in the range of 5∼10 mm/min. (3) Even under the best condition, the coarse crystalline will appear in structures and it can not be avoided without addition of Mn and Cr. The addition of a small amount of Mn and Cr not only eliminate the said deletrious deffects but also contribute to improve the season cracking of the alloys.


(Received 1949/7/27)

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