真空油淬炉主要用于合金钢、工具钢、模具钢、高速钢、轴承钢、弹簧钢、不锈钢等产品的光亮淬火、退火等工艺。主要分为双室炉和三室炉两种炉型。双室炉为加热室和冷却室组成；三室炉多加一个准备室，使生产更加的连续，提高生产效率。其特点是：常规炉型、同等功率下,油淬炉的适应面比较宽；同规格（装炉量）的炉子,油淬炉的生产成本比较低；淬火油在使用过程中污染小，能够长期重复使用；整个工作期间，炉体一直处于负压状态，安全性高；在淬火时冷却速度比较快，能够提高生产效率。工作特性：一般采用炉内料车进行自动化操作，炉内料车要有严格的限位要求，通过炉内料车将工件在加热室和冷却室之间进行传递，从而完成整个的热处理进程。风机一般是工件淬火前进行预冷和压低淬火油液面的作用，一般在淬火前都要进行3-5秒的预冷。在淬火前和淬火中还要开启油搅拌，用以出去淬火油中的气体和降低油温。淬火油一定要选择专门的真空淬火油。
Vacuum oil quenching furnace is mainly used for bright quenching and annealing of alloy steel, tool steel, die steel, high speed steel, bearing steel, spring steel, stainless steel and other products. It is mainly divided into two types of furnace: two chamber furnace and three chamber furnace. Two chamber furnace is composed of heating chamber and cooling chamber; three chamber furnace is equipped with one more preparation chamber, which makes the production more continuous and improves the production efficiency. Its characteristics are as follows: under the condition of conventional furnace type and the same power, the suitable surface of oil quenching furnace is relatively wide; the production cost of oil quenching furnace with the same specification (charging capacity) is relatively low; the pollution of quenching oil is small in the use process, which can be reused for a long time; during the whole working period, the furnace body has been in the negative pressure state, with high safety; the cooling speed is relatively fast during quenching, which can improve the production efficiency. Working characteristics: generally, the automatic operation is carried out by the charging car in the furnace. The charging car in the furnace has strict limit requirements. The workpiece is transferred between the heating chamber and the cooling chamber through the charging car in the furnace, so as to complete the whole heat treatment process. Generally, the fan is used for precooling before quenching and lowering the quenching oil level. Generally, precooling for 3-5 seconds is required before quenching. Before and during quenching, oil agitation shall be started to remove the gas in quenching oil and reduce oil temperature. Special vacuum quenching oil must be selected for quenching oil.