Metal heat treatment is a working procedure to improve the mechanical properties of metal workpieces. The hardness, strength and wear resistance of metal workpieces can be improved by heat treatment.
Heat treatment process generally includes three processes: heating, heat preservation and cooling, sometimes only heating and cooling. These processes connect with each other and cannot be interrupted. Heating is one of the important processes of heat treatment. There are many heating methods of metal heat treatment, such as charcoal and coal as heat source, and then liquid and gas fuel. With the application of electricity, induction heating equipment makes heating easy to control and has no environmental pollution. These heat sources can be heated directly or indirectly by molten salt or metal or even floating particles.
When the metal is heated, the workpiece is exposed to air, which often oxidizes and decarburizes (that is, the surface carbon content of iron and steel parts decreases), which has a very negative effect on the surface properties of the parts after heat treatment. Therefore, metals should usually be heated in controllable atmosphere or protective atmosphere, molten salt and vacuum, or by coating or packaging.
The heat treatment process of spring is mainly based on the variety and processing state of spring material, which can be divided into three types. The first type: all kinds of strengthened steel wire, such as carbon spring steel wire, carbon spring steel wire for important use, oil quenching and tempering spring steel wire and steel strip made by cold forming process, only need to be annealed after forming.
Metal heat treatment process is one of the important processes in mechanical manufacturing. Compared with other processing processes, heat treatment generally does not change the shape and overall chemical composition of the workpiece, but by changing the internal microstructure of the workpiece. Or change the chemical composition of the surface of the workpiece, enroll or improve the performance of the workpiece. It is characterized by improving the internal quality of the workpiece, which is generally not visible to the naked eye.
Overseas manager: Tom Wang
Phone: 0086-13303078975(whatsapp, wechat,line)
Specialist of bar heat treatment furnace in China; Glad to be your business partner in induction heating field.
Post time: 05-28-2019