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This text provides a comprehensive overview of the technology surrounding the brazing process to allow the inexperienced engineer, student or professional, to utilize fully this technology.
This specification prescribes the requirements for the classification of brazing filler metals for braze and braze welding. The chemical composition, physical form, and packaging of more than 120 brazing filler metals are specified. The brazing filler metal groups described include aluminum, cobalt, copper, gold, magnesium, nickel, silver, titanium, and brazing filler metals for vacuum service. Information is provided concerning the liquidus, the solidus, the brazing temperature range, and general areas of application recommended for each brazing filler metal. Additional requirements are included for manufacture, sizes, lengths, and packaging. A guide is appended to the specification as a source of information concerning the classification system employed and the intended use of the brazing filler metals for braze and braze welding. This specification makes use of the International System of Units (SI) and U.S. Customary Units. Since these are not equivalent, each must be used independently of the other.
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 metallurgical background is built on phase diagrams of BM and BFM and potential interactions. Novel methods of BFM placements, joint loading and heat treatment are covered. Rapidly solidified amorphous BFMs are described. The modern outlook on metallurgical paths of joint formation and an understanding of brazing mechanisms are provided. Finally, recent examples of advanced applications are given, particularly in the aerospace and automotive industries and in energy conservation and environment protection.