| ? ? ? ? Q345B precision bright tube | precision steel pipe, the latter is austenitized, moved into the front chamber, filled with nitrogen to atmospheric pressure, and oil. The temperature of vacuum carburizing is generally higher than that of ordinary gas carburizing. The infiltration and diffusion are usually carried out at 920-1040 ¡æ, which can be divided into two stages as shown in the figure. Pulse ventilation and gas stop can also be used, and multi-stage infiltration and expansion are alternately used, which has better effect. Because of the high temperature, especially the surface is clean and active, the forming speed of vacuum carburizing layer is faster than that of ordinary gas, liquid and solid carburizing. If the carburizing layer is required to be 1 mm, it only takes 5 h at 927 ¡æ and 1 h at 1033 ¡æ.
? ? ? ? Q345B precision bright tube | precision steel pipe hardness and deformation, take two samples, one is used to study the influence of different deformation degree on hardness, the other is to study the influence of different temperature on the performance. Strong cold deformation ? ? ? It is of great significance in practical production. First of all, this is an important means of strengthening materials, especially for materials that cannot be strengthened by heat treatment. Secondly, cold deformation strengthening is beneficial to the uniform deformation of metal.
? ? ? ? ? The deformation part of Q345B precision bright tube | precision steel pipe will harden, which will make the deformation continue to develop to the part with no deformation or less deformation. Thirdly, cold deformation strengthening can improve the safety of components in the process of use. Once the components are overloaded, plastic deformation will occur. Due to the strengthening effect, the sudden fracture of the components can be prevented. However, cold deformation strengthening also brings difficulties to the continuous deformation of Wuxi precision steel pipe, and even cracks appear. Therefore, "intermediate annealing" is often carried out in the deformation and processing of Wuxi precision steel pipe to eliminate its adverse effects.