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Special non-leaded brasses for permanent mould casting

Kondracki M., Szajnar J.

Journal of Achievements in Materials and Manufacturing Engineering

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2007

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Vol. 25, nr 2

17-23

EN

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.

2

Possibilities for leaded brass replacement with multi-component brass

Kondracki M., Szajnar J.

Archives of Foundry Engineering

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2007

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Vol. 7, iss. 2

57-64

EN

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. 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. 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. 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. 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. Alloys engineered with use of presented approach have properties close to leaded brass with low increase in total production costs.

3

Evaluation of possibilities for leaded brasses replacement

Kondracki M., Gawroński J., Szajnar J.

Journal of Achievements in Materials and Manufacturing Engineering

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2006

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Vol. 17, nr 1-2

81--84

EN

Purpose: Leaded brasses are most commonly used Cu alloys, especially for home fixture. High toxicity of lead to human caused tendency to eliminate lead 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.

4

Własności technologiczne bezołowiowych mosiądzów armaturowych

Kondracki M., Gawroński J., Szajnar J., Dyrbuś G.

Archiwum Odlewnictwa

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2003

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R. 3, nr 9

287--292

PL

W artykule przedstawiono porównanie własności technologicznych mosiądzu ołowiowego MO59 z grupą mosiądzów bezołowiowych, w których ołów zastąpiono ze względu na jego wysoką toksyczność bizmutem. Głównym celem badań było zbadanie lejności i skrawalności wymienionych stopów. Wskazano wady i zalety nowych rozwiązań.

EN

This article shows the investigation of technological properties of leaded and non-leaded brasses with different bismuth content. Authors show advantages and disadvantages of new non-leaded alloys.