Topic: Material Science
What is the common surface hardening treatment in steel?
- A. Carburizing
- B. Tempering
- C. Quenching
- D. None of the above
Answer: A. Carburizing
Explanation: Carburizing is the common surface hardening treatment used in steel. It is specifically used for low carbon steel to introduce carbon into the surface layer, making the exterior hard and wear-resistant while leaving the core tough and ductile.