On 2018-08-08 14:48:54
Heat treatment of nodular cast iron
In order to make the metal parts have the required mechanical, physical and chemical properties, in addition to the reasonable selection of materials and various forming processes, heat treatment process is often essential. Steel is the most widely used material in mechanical industry. The microstructure of steel is complex and can be controlled by heat treatment, so the heat treatment of steel is the main content of metal heat treatment. In addition, aluminum, copper, magnesium, titanium and their alloys can also change their mechanical, physical and chemical properties through heat treatment to obtain different service properties.
When we process some metal workpieces, we often use a method of heat treatment. There are also some differences in this process method for different processing objects. As for nodular cast iron and steel, if they both need heat treatment, we should also treat them differently in specific operation. How about the breakdown.
Of course, the heat treatment of nodular cast iron is not completely different from that of steel, and they also share similar parts. Although the heat treatment of nodular cast iron is modeled on the heat treatment process of steel, there are still differences, mainly because of the existence of graphite in nodular cast iron and the difference of chemical composition, which leads to the special heat treatment of cast iron.
The method of heating and cooling is generally used in the heat treatment of nodular cast iron, because it can regularly change the core structure of nodular cast iron, so that its tenderness can also be changed to meet our needs, such as higher strength, hardness, wear resistance, better plasticity, toughness and so on.