How to heat treat high-precision cold drawn tubes?
High-precision cold-drawn tubes have particularly high technical requirements in production and processing. 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. They are more susceptible to stimulation during the condensation process! If you want to pursue high-quality physical and chemical properties, you mustHigh precision cold drawn tubeheat treatment.
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 final residual stress. On the other hand, due to changes 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 by the expansion of the volume of the workpiece, and various parts of the workpiece will undergo phase transformation, resulting in inconsistent volume growth and tissue stress. The final result of tissue stress changes is that the surface layer is subject to tensile stress and the core is subject to compressive stress, which is exactly the opposite of thermal stress. The size of the structural stress is related to the cooling rate, shape, chemical composition of the material and other factors of the workpiece in the martensitic transformation zone.
The heat treatment technology of high-precision cold-drawn tubes is related to the hardness of high-precision cold-drawn tubes, and the perfect volume is related to this technology.
The main products produced by Changzhou Baiquan Hydraulic Machinery Co., Ltd. include: rolled pipes, high-precision cold drawn pipes, honed pipes, piston rods, etc. The products are widely used in high-precision rollers and large-tonnage automobile transmission shafts in engineering, metallurgy, shipbuilding and transportation, mechanical hydraulic cylinders, oil field pumping, submersible pump barrels, textiles, glass, plastics and other industries.