Casting Forming And Joining Processes

Centre-line feeding resistance CFR is an important parameter in casting processes that measures the resistance to filling the mold A CFR greater than 70% typically indicates that the feeding of the material into the mold is difficult This could lead to issues such as improper filling or void formation in the final casting A lower CFR value indicates better feeding capability

In drawing the maximum possible reduction of area in one pass is theoretically limited by the material properties The maximum reduction of area is generally accepted as 63%

Step 1: Use the power equation.
The power is given by: The equation for the voltage and current is: Step 2: Maximize power To maximize power, we need to find the voltage and current that give the highest value of . This happens when . Step 3: Conclusion By solving the equation, the optimal voltage is . Final Answer:

Step 1: Understand solid-state joining processes.
Solid-state joining processes occur without melting the base materials. These processes rely on the application of heat and pressure to join materials. Step 2: Identify the correct process
- Friction welding is a solid-state joining process where heat is generated by friction, and the materials are welded without melting.
- The other options, such as Gas tungsten arc welding, Submerged arc welding, and Resistance spot welding, are fusion welding processes, which involve melting the base materials.
Step 3: Conclusion The correct answer is Friction welding. Final Answer: