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Eliminacja ołowiu z armaturowych stopów miedzi z cynkiem

100%

Kondracki M. , Gawroński J. , Szajnar J.

2006

tom Vol. 26, nr 1

47-55

W artykule przedstawiono stosowane do tej pory metody eliminacji ołowiu ze stopów miedzi. Szczególną uwagę zwrócono na możliwości zastąpienia mosiądzów armaturowych stopami wieloskładnikowymi. Omówiono metodykę prowadzanych badań i ich wyniki. Porównano w-iaściwości nowych stopów z właściwościami klasycznych mosiądzów ołowiowych.

In this work lead elimination methods from fixture brasses were described. Special attention was pointed on possibility of leaded brass replacement with multi-component brass. Studies methodology was shown with some results. The properties of new multi-component alloys were compared with traditional leader brass CuZn39Pb2.

Special non-leaded brasses for permanent mould casting

100%

Kondracki M. , Szajnar J.

2007

tom Vol. 25, nr 2

17-23

Purpose: Leaded brasses are most commonly used Cu alloys, especially for home fixture. High toxicity of lead to human caused tendency to eliminate this additions from these alloys. In this work a discussion of solutions to this problem is shown and possibilities of leaded brasses replacement with multi-component non-leaded brasses. Design/methodology/approach: In this work general properties of multi - component brasses are investigated (mechanical, technological and operating properties) as well as its structure and their correlation with chemical composition. Some interactions of additions are shown with physical and mathematical model of its influence on properties. Findings: It was found that in a complex of additions (closed system) the interactions can be described by physical model and mathematical equations showing properties in function of chemical composition can be used to optimize chemical composition for engineering alloys with known properties. Research limitations/implications: However introducing new elements to the system (chemical composition) will disturb the created models (physical and mathematical). It must be said that for investigated alloys optimal properties can be ensured using presented models. Practical implications: Presented approach enables optimization of alloy properties for particular application. Properties can be introduced to the mathematical model which with use of optimization methods will return needed chemical composition. Originality/value: Alloys engineered with use of presented approach have properties close to leaded brass with low increase in total production costs.