· Aleaciones ligeras ·
K.H. Choe*, G.S.Cho*, K.W. Lee*, Y.J. Choi**, K.Y. Kim*** and M.H. Kim****
*KITECH, Korea, **Hanbat N. U, Korea.*** Hankuk Aviation U, Korea. ****Inha U, Korea
67th World Foundry Congress
The microstructures and mechanical properties of high strength brass
made by semi solid squeeze forging were investigated and compared with
those of conventionally hot forged product and gravity die castings. No
shrinkage or gas hole was found in squeeze forgings. Fine equiaxed
crystals developed at the center of squeeze forgings, while grains in the
corner of squeeze forgings were elongated perpendicular to the pressure
direction. The grains of squeeze forgings were smaller than those of hot
forgings and gravity die castings. It is suggested that a rapid heat transfer
condition due to applied pressure is responsible for grain refinement.
Tensile and yield strengths of squeeze forgings were as high as those of
hot forgings but elongation was positioned between that of hot forgings
and gravity die castings.
