Presentation is loading. Please wait.

Presentation is loading. Please wait.


Similar presentations

Presentation on theme: "BRAZING, SOLDERING, AND ADHESIVE BONDING (Chapter 31)"— Presentation transcript:


2 Brazing, Soldering, and Adhesive Bonding
Chapter Overview This chapter considers three joining processes that are similar to welding in certain respects: Brazing, Soldering, and Adhesive Bonding Brazing Brazed Joints Filler Metals and Fluxes Brazing Methods Soldering Joint Designs in Soldering Solders and Fluxes Soldering Methods Adhesive Bonding Joint Design Adhesive Types Adhesive Application Technology Advantages and Disadvantages of Each Process

3 Brazing Is a joining process in which a filler metal is melted and distributed by capillary action between the faying surfaces of the metal parts being joined No melting of the base metal occurs Only the filler melts Filler metal (brazing metal) has a melting temperature above 450° C but below the melting point of the base metal to be joined

4 Brazed Joints Two common types: butt and lap joints
Been adapted for the brazing process Lap joints more widely used since they provide large interface between parts Clearance between mating surfaces of base parts is important as must be large enough as not to restrict molten filler metal Typical brazing clearances at brazing temperature is mm Cleanliness of the joint surface prior to brazing is important – must be free of oxides, oils, & other contaminants to promote wetting & capillary attraction

5 Filler Metals and Fluxes
Common filler metals: aluminum silicon, copper, copper and phosphorous, copper & zinc, gold & silver, nickel alloys, silver alloys Qualifications for brazing metals Melting temperature must be compatible with base metal Surface tension in liquid phase must be low for good wettability Fluidity of molten metal must be high for penetration into the joint Chemical and physical interactions with the base metal must be avoided The metal must be capable of being brazed into a joint of adequate strength for the application

6 Brazing Methods Torch Brazing gfdsdfgfd Furnace Brazing fdsasdfda
asdfdsa Induction Brazing Resistance Brazing

7 Brazing Methods Cont’d
fdsa Dip Brazing Infrared Brazing fdas Braze Welding

8 Advantages & Disadvantages

9 Soldering Similar to braising and can be defined as a joining process which a filler metal with a melting point below 450° C is melted and distributed by capillary action between the faying surfaces of the metal parts to be joined No melting of base metal occurs Filler metal wets and combines with base metal to form a metallurgical bond Filler metal is called solder

10 Joint Designs in Soldering

11 Solders & Fluxes

12 Soldering Methods Hand Soldering Wave Soldering Reflow Soldering

13 Advantages & Disadvantages

14 Adhesive Bonding

15 Joint Design

16 Adhesive Types Natural Adhesives Inorganic Adhesives
Synthetic Adhesives

17 Adhesive Application Technology
Surface Preparation Application Methods: Brushing Flowing Manual rollers Silk screening Spraying Automatic applicators Roll coating

18 Advantages & Disadvantages

19 References Groover, M. P. (2010). Fundamentals of modern manufacturing: materials, processes, and systems. Upper Saddle River, N.J.: Prentice Hall.


Similar presentations

Ads by Google