Presentation is loading. Please wait.

Presentation is loading. Please wait.

PowerPoint ® Presentation Chapter 11 Iron and Steel Ironmaking Steelmaking.

Similar presentations


Presentation on theme: "PowerPoint ® Presentation Chapter 11 Iron and Steel Ironmaking Steelmaking."— Presentation transcript:

1

2 PowerPoint ® Presentation Chapter 11 Iron and Steel Ironmaking Steelmaking

3 Chapter 11 Iron and Steel The blast furnace is used to convert iron ore into pig iron.

4 Chapter 11 Iron and Steel Elements present in pig iron must be refined to allowable amounts to meet steelmaking specifications.

5 Chapter 11 Iron and Steel The microstructure of wrought iron consists of ferrite grains incorporating a large quantity of silicate slag elongated in the working direction.

6 Chapter 11 Iron and Steel In the basic oxygen furnace, oxygen is lanced into the molten pig iron and scrap steel.

7 Chapter 11 Iron and Steel The open hearth furnace can make large amounts of steel in one heat.

8 Chapter 11 Iron and Steel The electric-arc furnace is the most common furnace used in making many alloys of steel.

9 Chapter 11 Iron and Steel Each level of deoxidation practice exhibits a significant influence on the macrostructure of the ingot.

10 Chapter 11 Iron and Steel A shroud is used to protect the molten steel from picking up atmospheric gases as it is poured from the ladle into the mold.

11 Chapter 11 Iron and Steel The four types of semifinished forms (blooms, billets, slabs, and rounds) are defined by shape and dimensions.

12 Chapter 11 Iron and Steel The ingot mold is tapered to facilitate its removal from the steel ingot after solidification.

13 Chapter 11 Iron and Steel The macrostructure of a cast ingot consists of a chill zone of fine equiaxed grains adjacent to the mold wall, columnar grains that grow perpendicular to the wall, and equiaxed grains toward the center.

14 Chapter 11 Iron and Steel Primary rolling reduces the ingot to semifinished forms of desired cross section.

15 Chapter 11 Iron and Steel Continuous casting is a direct and continuous method of producing blooms, billets, slabs, and rounds.

16 Chapter 11 Iron and Steel Pipe is a shrinkage cavity located in the upper portion of the ingot.

17 Chapter 11 Iron and Steel Heavy press forging is performed in a large hydraulic press in order to reduce the size of the ingot to a semifinished form larger than a standard bloom.

18 Chapter 11 Iron and Steel Structural shapes are formed in several rolling sequences, known as roughing, intermediate rolling, and finishing.

19 Chapter 11 Iron and Steel Wire is drawn in several stages, known as drafts, on a wire drawing machine. After each draft the wire is coiled.

20 Chapter 11 Iron and Steel Tubing products may be produced as seamless or welded.

21 Chapter 11 Iron and Steel Inclusions become elongated in the working direction of the steel and lead to directional mechanical properties, known as anisotropy.

22 Chapter 11 Iron and Steel The AISI-SAE designation system indicates the alloying elements and the partial chemical composition.

23 Chapter 11 Iron and Steel The end use of carbon steel is strongly influenced by the carbon content.

24 Chapter 11 Iron and Steel Generic ASTM specifications indicate common characteristics of families of product forms and prevent excessive repetition in the individual product specifications.

25 Chapter 11 Iron and Steel Quality descriptors in ASTM standards are used to distinguish products well suited to specific applications.


Download ppt "PowerPoint ® Presentation Chapter 11 Iron and Steel Ironmaking Steelmaking."

Similar presentations


Ads by Google