Understand the heat treatment process of high-precision cold drawn tubes
The production and processing requirements for high-precision cold drawn tubes are very high. Under the action of heat, high-precision cold-drawn tubes have a relatively high surface temperature, a relatively fast shrinkage speed, and a relatively fast condensation speed, so they are easily affected during the condensation process. In order to obtain good chemical and physical properties, it is necessary to perform heat treatment processing of high-precision cold drawn tubes.
The faster the cooling rate, the higher the carbon content and alloy composition, the greater the uneven plastic deformation produced under the action of thermal stress during the cooling process, and the greater the residual stress formed. On the other hand, due to the change in the structure of steel during the heat treatment process, that is, when austenite transforms into martensite, the increase in specific volume will be accompanied byHigh precision cold drawn tubeThe volume of the workpiece expands, and various parts of the workpiece undergo phase changes successively, resulting in different volume growth and tissue stress. What changes the tissue stress is that the tensile stress of the surface layer is exactly opposite to the thermal stress. The size of the organizational stress is related to factors such as the cooling rate, shape, and chemical composition of the material in the martensitic transformation zone.
The heat treatment process of high-precision cold-drawn tubes is related to the hardness of high-precision cold-drawn tubes, and the size is also related to its processing technology.
