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How To Perform Heat Treatment On High Precision Cold Drawn Tubes
May 09, 2018

High-precision cold-drawn tubes are particularly high in the production and processing of the technical requirements, high-precision cold-drawn tubes under the effect of heat, due to the formation of the temperature is relatively high, the contraction rate is faster, the speed of condensation is also relatively Fast, easy to be stimulated in the process of condensation! In order to pursue the high-quality physical and chemical properties, high-precision cold-drawn tubes must be heat-treated.

The faster the cooling rate, the higher the carbon content and the alloy composition, and the greater the non-uniform plastic deformation caused by the thermal stress in the cooling process, the greater the residual stress formed. On the other hand, due to the change of microstructure during the heat treatment of steel, that is, austenite to martensite, due to the increase in specific volume, the volume of the workpiece expands. Each part of the workpiece undergoes a phase change, resulting in an inconsistency in volume growth. stress. The ultimate result of the change in tissue stress is the tensile stress on the surface and the stress on the heart, which is exactly the opposite of the thermal stress. The size of the tissue stress is related to the cooling rate, shape, and chemical composition of the material in the martensitic transformation zone.

The heat treatment technology for high-precision cold-drawn tubes is related to the degree of hardness of high-precision cold-drawn tubes. The perfect volume is related to this technology.