Steels

Table of Contents

Steels

Selection of Iron and Steel

Effect of Carbon Content

Iron-carbon Phase Diagram

Low Carbon - Mild Steel (~0.1%C)

Carbon Atmospheres

Luders Bands

Luders Bands (cont.)

Prevention of Luders Bands

Full TTT Curves for Steel

Martensite

Martensite and Carbon Content

Heat Treatment of Steels

Heat Treatment Processes

Annealing

Annealing (cont.)

Quenching and Tempering

Quench Hardening

Quench Hardening (cont).

Continuous Cooling Transformation (CTT) Curves

CCT curves (cont.)

Hardenability

Assessment of Hardenability

Assessment of Hardenability

Grossman Method

Jominy End Quench

Factors Affecting Hardenability

Is High Hardenability Desirable?

Specialist Heat Treatments

Specialist Heat Treatments (cont.)

Tempering of Martensite

Secondary Hardening Steels

Welding of Steel

Microstructural Changes

Fusion Zone

Heat-Affected Zone (HAZ)

HAZ (cont.)

Problems with Steel Welds

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