On 2018-08-08 14:48:54
Heat treatment process
Heat treatment is a kind of comprehensive technological process that heat, heat and cool the material in a certain medium, and control its performance by changing the surface or internal structure of the material.
Metal heat treatment is one of the important processes in mechanical manufacturing. Compared with other processing technologies, heat treatment generally does not change the shape and overall chemical composition of the workpiece, but endows or improves the performance of the workpiece by changing the microstructure inside the workpiece or the chemical composition on the surface of the workpiece. Its characteristic is to improve the internal quality of the workpiece, which is generally not visible to the naked eye.
Nantong heat treatment process generally includes three processes: heating, heat preservation and cooling, sometimes only heating and cooling. These processes are interlinked and uninterrupted.
Nylon yarn is a kind of synthetic fiber. The focus structure is closely related to the drawing and Nantong heat treatment in the spinning process. It is easy to crystallize the nylon molecules spun at general spinning speed, which is crystallized in the spinning process, and nylon 6 will crystallize in the placing process after spinning. Due to the temperature difference between inside and outside during cooling forming, generally, the orientation of nylon is higher in the cortex, lower in the crystallinity, higher in the core and lower in the orientation.
The method of heating and cooling is generally used in Nantong 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.