1. During a Rockwell hardness test, what are the standard load (a) kg and test load (b) kg for a C-scale test?
2. Write the surface finish.
3. Definition and purpose of tempering
4. Two countermeasures against quenching cracks
5. Five major impurity elements in steel excluding Fe (iron) and four effects of Mn (manganese)
6. Five countermeasures to prevent temper embrittlement that occurs at 400-500°C
7. Four types of stainless steel
8. The graphitic carbon accumulated in a converter or carburizing furnace due to soot degrades the functionality of the converter or carburizing furnace. Therefore, a method that periodically injects an appropriate amount of air to burn and remove it as needed is?
- Burn out
9. Explain the mass effect and hardenability.
- Sorbite
- Sulphur Printing Method
- Free-cutting steel: It has good machinability and is suitable for high-speed cutting.
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