What material is best for forging? What material has the best weldability? Illustrate
With iron, iron casting material (such as the need to manufacture non-standard equipment, the diesel engine flywheel)
1, as long as the temperature is solid at room temperature, more than a temperature above the liquid material can be cast. Some of the lower melting point, liquid flow better material is more suitable for casting, such as bronze, iron, carbon steel and so on.2 brittle materials are not suitable for forging. Good plasticity, more plastic areas are more suitable for forging, such as carbon steel, alloy steel, and some non-ferrous metals such as copper, aluminum and magnesium alloys.3, in general, carbon content is relatively low or low carbon equivalent material welding performance is better, like low carbon steel, low alloy steel, such as Q235, Q345 and so on.
Gray cast iron is most suitable for casting, and most machine tools, equipment, stand, column and so on are all gray iron materials. Low carbon steel, medium carbon steel (including its alloy steel) material is most suitable for forging, most of the mass production of gears, shafts and other important parts are forged with this material rough. Low carbon steel has the best weldability. The weldability of medium carbon steel began to get worse, and the welding parts such as automobile body were all low carbon steel and its alloy steel.
