8 Mild Steel World of Welding（8焊接低碳钢世界）.pdf

8 Consumables Mild Steel temperature Distribution Across Iron carbon equilibrium Diagram Weldability of Steel Half the Weld Liquid overview d Weldability is a term used to describe the relative ease or Austenite difficulty with which a metal or alloy can be welded. The better c the weldability, the easier it is to weld. However, weldability is b a complicated property, as it encompasses the metallurgical compatibility of the metal or alloy with a specific welding process, a its ability to be welded with mechanical soundness, and the capacity Ferrite + of the resulting weld to perform satisfactorily under the intended Cementile service conditions. Before attempting to weld any material, it is essential to know 0.2% Carbon how easy it is to weld and to be aware of any problems that might arise. One of the main problems likely to be encountered when welding carbon and alloy steels is hydrogen cracking. For hydrogen cracking to occur, it is necessary to have a supply of hydrogen to Variation in temperature from the centre of the weld to the base material. the weld and a heat affected zone (HAZ), a susceptible hardened