advances in brazing

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Advances in brazing
Author :
Publisher : Elsevier Inc. Chapters
Release Date :
ISBN 10 : 0128088850
Pages : 620 pages
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An important brazing application is the production of cutting and machining tools. This chapter provides an overview of brazing alloys for the joining of cutting materials. Process-related problems and solutions are presented and discussed. High strength values can be achieved with the right filler alloy and joint design. Most cemented carbides consist of a hard material such as tungsten carbide and a metallic binder. Due to the high carbide content, wetting and bonding reactions have to be monitored. Addition of active elements can help to induce a wetting reaction. Brazing ceramic cutting materials requires the use of active filler alloys to achieve a wetting reaction. The chapter reviews the alloys required. A joint can be weakened by interfacial effects or mismatches in physical properties. Employing the right filler metal with an adapted brazing process can significantly improve joint quality. Stress calculations based on the finite element method contribute to better joint design with reduced stress levels.

Advances in brazing

An important brazing application is the production of cutting and machining tools. This chapter provides an overview of brazing alloys for the joining of cutting materials. Process-related problems and solutions are presented and discussed. High strength values can be achieved with the right filler alloy and joint design. Most cemented

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Advances in brazing

Although brazing is commonly regarded as a joining technique, the following chapter will introduce possibilities for using brazing as a coating technology, which offers new and unique solutions for applying functional coatings to surfaces. Details are presented of some fundamental aspects of this coating technology with regard to processes, metallurgical

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Advances in Brazing

Brazing processes offer enhanced control, adaptability and cost-efficiency in the joining of materials. Unsurprisingly, this has lead to great interest and investment in the area. Drawing on important research in the field, Advances in brazing provides a clear guide to the principles, materials, methods and key applications of brazing. Part

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Advances in brazing

Huge technological progress in high-temperature brazing has made in the last few decades. This chapter reassesses the topic. It describes compositional and structural specifics of base metal (BM) classes at high temperatures. The classification of brazing filler metals (BFMs) is given, with some new compositions. In choosing optimal BFMs the

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Advances in brazing

The chapter focuses on the problems of reactive-flux brazing and soldering of aluminium and aluminium to steel. High-temperature fluxes of the K,Al,Si/F salt system improve wetting and capillary properties of filler metals during brazing. The possibility of brazing aluminium using a reactive flux without a filler metal

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Advances in brazing

A quiet revolution in industry has happened over the last 50 or so years due to the use of diamond and cubic boron nitride (CBN) in many applications. Joining of diamonds to various materials via brazing is very specific compared with conventional brazing due to the unique nature of diamond. This

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Advances in brazing

Metal–nonmetal brazing is an established joining method used to fabricate products such as hermetic electronic packages, insulators for power generation and turbo-machinery components. Brazing presents opportunities for the materials engineer seeking to utilize recently engineered materials in advanced applications and extreme environments. Three commonly used brazing methods used for

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Advances in brazing

The creation of a thermally induced metallic bond between aluminium components in the absence of powdered brazing fluxes has been achieved using a number of different techniques. Oxide disruption to promote the wetting and flow of filler metal on the surface is necessary for brazed joint formation. This can be

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Advances in brazing

The phenomena involved in a brazing process constitute a set of very complex spatially distributed, transient physical and chemical processes, influenced by multiple parameters. This has been difficult to model reliably. This chapter offers a high level review of three broad areas of modeling: (i) the heating/cooling process during

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Advances in brazing

The brazing of carbon–carbon (C/C) composites and metals is a necessary manufacturing technique for some high-performance applications. In this chapter, the fundamentals of brazing C/C composites to metals are described including the wettability of the brazing filler on C/C composites and the coefficient of thermal expansion (

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Advances in brazing

Intermetallics have many metallic characteristics, including luster, and electrical and thermal conductivity. Ordered intermetallic structural materials have recently been the focus of many investigations. The physical and brazing properties of Ni–Al system intermetallics, Fe–Al intermetallics and Ti–Al intermetallics are presented in this chapter, including brazing methods, joint

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Advances in brazing

The amendment of the Drinking Water Directive has reduced the permissible nickel ion content in drinking water from 50μg/l to 20μg/l. The development of draft standards has begun on a European level so that national standards can be adjusted and transformed to meet European and international standards. For

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Advances in brazing

Despite the great advances in analytical methods available to structural engineers, designers of brazed structures have great difficulties in determining load-carrying capabilities of the brazed assemblies and predicting their failures. In this chapter we will review why such common engineering tools as finite element analysis (FEA) as well as many

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Advances in brazing

This contribution presents the state of the art in brazing metal–ceramic compounds. General problems during brazing of metal and ceramic and different process variations with appropriate brazing materials are described. The brazing process itself and interesting examination methods for metal–ceramic compounds are explained. For a selected material combination,

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Advances in brazing

The fundamental equations of wetting and adhesion are presented and the contact angles of non-reactive liquid metals and molten oxides on different types of solids are interpreted. The main features of reactive wetting are briefly described and illustrated. The two types of brazing used in practice (capillary brazing and sandwich

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