Introduction to Brazing Technology

Introduction to Brazing Technology provides practical guidance for the industrial production of an effectively brazed joint. Written in plain language by an active technical consultant with more than 50 years of brazing experience, this clear and concise book: Explains the fundamental concepts of the brazing process Covers all the common heating methods used for brazing Describes how to obtain brazing operator accreditation Addresses the latest advances in brazing technology Features an extensive glossary of brazing terms Underscores the importance of the joint gap References EN and ISO standards Introduction to Brazing Technology ensures a good working knowledge of the application of brazing as an industrial joining technique. The book offers new and existing users of the technology a comprehensive reference for tackling the day-to-day challenges encountered during the brazing process.

Process Fundamentals and Operator SafetySetting the SceneWettingCapillary FlowHealth and Safety in Brazing Where Brazing Fits in Joining TechnologyWhich Specific Process Should Be Used?What Are the Advantages of Brazing?Basic Definitions and PrinciplesCapillary Attraction and Capillary FlowSolidus, Liquidus, Melting Range and EutecticWorking TemperatureLiquationProcess WindowHeat Pattern DevelopmentProceduresComponent CleanlinessSummary: Fundamental Rules for Successful Brazing Joint Design FundamentalsIntroductionBasic Joint Design ConfigurationsAtmosphere Furnace Brazing Filler Materials, Fluxes and Brazing Paste FundamentalsIntroductionAluminium-Base Filler MaterialsSilver-Base Filler MaterialsSelf-Fluxing CuP and AgCuP AlloysCopper-Brazing Filler MaterialsHigh-Temperature Nickel (and Cobalt) Filler MaterialsUnclassified Platinum-Group Metal Filler AlloysISO Standardised Noble-Metal-Bearing Filler MaterialsBrazing FluxesBrazing Alloy Pastes Brazing with FlamesTorches for Manual Flame BrazingFlame Process RelationshipsHeating with FlamesGases and Gas MixturesHand-Torch-Brazing TechniqueAutomated Flame-Brazing MachinesProcess Complexity Induction and Resistance HeatingIntroductionWhat Induction Heating offers in BrazingCommonly Used Inductor ShapesDesign of Joints and the Associated InductorsResistance Heating Furnace BrazingIntroductionOxide FilmsBrazing in a Reducing AtmosphereTypes of Furnaces Used for BrazingBrazing in VacuumVacuum Brazing Process ParametersFurther General Comments on Vacuum BrazingVapour Pressure Brazing AluminiumIntroduction to the Technology of Aluminium BrazingUse of Brazing for the Joining of Aluminium and its Alloys Troubleshooting and Some Common Brazing ProblemsIdentification of the ProblemMethodology of TroubleshootingAre You Asking Yourself the Right Questions?FlexibilitySeeking AdviceFrequently Asked QuestionsIs It Possible to Braze Ceramics?Can I Braze to the Surface of an Electroplated Item?Which Filler Material Will Be Best for the Brazing of Tungsten Carbide Teeth to Circular Saw Blades?Can Brass Be Successfully Brazed without Flux in a Reducing-Atmosphere Furnace?Can Contact with Ammonia Result in the Corrosion of a Joint?What Is the Maximum Temperature at Which a Brazed Joint Can Be Safely Used?Can Tool Steels Be Brazed?What Is Crevice Corrosion?What Is the Trillium Project? Accreditation of Brazing OperatorsScopeNormative ReferencesApproval of the Parts to Be Joined by BrazingTerms and DefinitionsInformation and Requirements to be both agreed upon and DocumentedBrazing VariablesThe pBPSStage 4: Approval of OperatorsTest Pieces and Test SpecimensExamination and TestingRange of ApprovalBrazing Procedure Approval Record Importance of the Joint Gap in BrazingSome Initial Points about Brazing When a Flux Is UsedSome Initial Points about Fluxless Brazing ProcessesContribution of the Brazing Gap to Process ControlBrazing in conjunction with FluxProcess Parameters for the Use of FluxHigh-Temperature Brazing in conjunction with a FluxFluxless Brazing ProcessesFiller Metal Pre-Placement: Sandwich JointsConventional Pre-Placement of Filler Material Glossary Addendum A: SafeFlame® Appendix A: Selection Charts Appendix B: Filler Metal Comparison Tables

P. M. Roberts first encountered the brazing process when he joined Johnson Matthey and Company Limited in 1956 to train as an assayer of industrially used silver alloys and silver-containing brazing filler materials. In 1958, he changed departments and trained as a process control metallurgist, and studied the intricacies and the technology of the subject at Battersea Polytechnic, the forerunner of Surrey University. In 1963, an opportunity arose for him to join the Sales Technical Services Department of Johnson Matthey Metals to be trained as a specialist brazing engineer. During the next 30 years, he held a sequence of technical posts that provided support to the customers of three of the four leading producers of brazing materials in the Western world, and gained hands-on practical experience in the specification and use of automated brazing equipment and continuous-conveyor brazing furnaces. Between 1993 and 1996, he was the manager of the Precious Metals Division of the UK Branch of Degussa AG. He took early retirement on his 60th birthday in 1996, and created Delphi Brazing Consultants, a small but specialised business that is still in operation. This change of role on his retirement has been instrumental in his being able to write and help clients around the world solve brazing problems.