Çağlar YÜKSEL, Hüseyincan EKER, Muzaffer TÜRKOĞLU, Yaşar Onur BATMAZ, Mustafa ENGİN
Even though there are several methods to obtain refined grains in the cast microstructure, grain refining via chemical agents introducing to the liquid metal is a common practice to procure enhanced properties of both net-shape and near-net shape parts for casting applications. The importance of fine grains in contrast to columnar grains is known for casting. A fine-grained structure has reduced anisotropy, good formability, and less segregation.Besides, efforts of casting engineers always are attempted to attain more refined cast structures, thus, this trial is focussed on semi-continuous casting system of copper alloys. In addition, the grain refining mechanism provides hot tear resistance, casting fluidity, and increased surface quality for some alloys. It has importance in copper alloys as well as resistance in hot tear resistance.In this study, grain refinement behavior of six different hot-rolled CuZn10 copper alloys was investigated. 0.01, 0.03, 0.06, 0.09, 0.12, and 0.15 wt.% Fe were added to the brass melt. Tensile tests were performed to evaluate the effect of Fe element as a grain refiner, and values of the mechanical tests were measured according to ASTM E8 / E8M-16ae1. A correlation was established between Fe% and mechanical properties. Also, microstructural analyzes were conducted via optical microscope to examine the average grain size.

Anahtar Kelimeler: CuZn10, Brass, Hot rolling, Grain refinement, Grain refiner