Assignment
1. A 0.90 % C hypereutectoid plain-carbon steel is slowly cooled form 900oC to a temperature just slightly above 723oC. Calculate the weight percent proeutectoid cementite and austenite present in the steel.
![195_Curve Graph.jpg](https://secure.tutorsglobe.com/CMSImages/195_Curve%20Graph.jpg)
2. What is the normalizing heat treatment for steel? What are some of its purposes?
3. Describe the tempering process for a plain-carbon steel.
4. What are the advantages of the austempering process? What are the disadvantages?
5. What are some of the limitations of plain-carbon steels for engineering designs?
6. What are the principal alloying elements added to plain-carbon steels to make low-alloy steels?