152. Why is a surfacing weld different from the other weld types? 153. Why is it desirable to use energy sources for wel

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152 Why Is A Surfacing Weld Different From The Other Weld Types 153 Why Is It Desirable To Use Energy Sources For Wel 1 (112.46 KiB) Viewed 41 times

152. Why is a surfacing weld different from the other weld types? 153. Why is it desirable to use energy sources for welding that have high heat densities? 154. What is the unit melting energy in welding, and what are the factors on which it depends? 155. Define and distinguish the two terms heat transfer factor and melting factor in welding. 156. What is the heat-affected zone in a fusion weld? 157. How do brazing and soldering differ from the fusion-welding processes? 158. How do brazing and soldering differ from the solid-state welding processes? 159. What is the technical difference between brazing and soldering? 160. Under what circumstances would brazing or soldering be preferred over welding? 161. What are the two joint types most commonly used in brazing?