Evaluation of Precipitates Type in Brasses as a Function of Charge Material

Abstract

Trial series of cast alloy MO59 obtained from qualified scrap was investigated. SEM and TEM of resulting precipitates were conducted. The SEM analysis demonstrated the dependence of silicon, phosphorus, iron, chromium and nickel in the composition of the so-called hard precipitates. TEM analysis showed the formation of phase AlFeSi and AlCr. Made studies have shown the important role of the composition of the batch melts brass CuZn39Pb2 type. The analysis of SEM and TEM resulting precipitates pointed to the formation of various forms of divisions, only one of which was described in the literature character of the so-called hard inclusions. The SEM studies demonstrated the dependence of the occurrence of inclusions rich in silicon, phosphorus, iron, chromium and nickel. In contrast, additional TEM analysis indicated the formation of AlFeSi phase type and AlCr. The results of the analyses referred to the structure of the batch. Due to the difficulty of obtaining recycled materials that do not contain these elements necessary to carry out further analyzes in the direction of defining the role of phosphorus in the formation of the so-called hard inclusions.

Database of Materials for the Evaluation of the Impact of Harmful Substances in Metallurgical Processes

“…The following figure shows a calculator that facilitates calculating the load of charge (Figure 3). [15] The application contains an interesting appendix describing the determination of process parameters and end properties in copper production [16,17]. You can find here not only information on the processes of alloying, refining or the machining process of a given material.…”

Study of Formability of Brass Sheet Metal Under Different Temperature Conditions

“…The most widely used brass in industrial applications consists of 30-45 wt.% Zn [27,28]. With addition of other alloying elements such as Al, Sn, Ni, Fe etc properties and performance can be enhanced [29,30]. Brass classified as α brass, α + β' brass, and β' brass, and their microconstituents and microstructures are changes with the content of Zn present.…”

Experimental Investigation and Optimization of Material Properties of Brass at Different Temperature Conditions Using Taguchi Technique

“…The brass consists of 30-45 wt.% Zn mostly used in industrial application [7,8]. By adding alloy elements (Al, Sn, Ni, Fe) properties are modified and its performance can be improved [9,10]. Brass can be classified into α brass, α + β' brass, and β' brass, and their microstructures are changes with Zn content.…”