Simulation study on heating characteristics of vertical vacuum heat treatment

In this paper, the vertical vacuum furnace numerical model was built by AnsysWork bench, and the finite element simulation calculation of the heating process of vertical vacuum furnace was carried out based on the transient heat of ANSYS software. The temperature field distribution during the heating process under the condition of empty furnace was analyzed, and the influence of the number and placement of workpieces was studied. The results show that the heating lag is relatively large in the early stage of heating, and the maximum temperature difference reaches 26.81 ℃ under the condition of empty furnace. With the extension of time, the temperature difference of each point gradually decreases, and the maximum temperature difference is only about 2.28 ℃ at 3600 s. The uniformity of furnace temperature in empty furnace is better than that with workpiece. The number of workpieces and the way of placement mainly affect the temperature field distribution in the furnace body in the initial period, among which the way of placement has a greater impact, so the masking should be minimized or avoided in actual production.