Vacuum oil quenching furnace is suitable for vacuum heat treatment of die steel, spring steel, stainless steel, bearing steel, superalloy steel, etc. Its main characteristics are wide range of suitable materials, strong hardenability, low cost and reusable quenching oil. The shortcomings are: the deformation is relatively large, and the workpiece needs to be cleaned in the follow-up. The vacuum oil quenching furnace can be divided into two-chamber furnace and three-chamber furnace.
For gas quenching furnaces, oil quenching furnaces are more suitable for processing small pieces of materials with higher hardenability (such as 35CrMnSi small pieces) and high hardenability materials. Oil quenching furnaces are more widely used than the former, because the maximum cooling rate of high pressure gas is much lower than that of quenching oil, but the operation and maintenance of gas quenching furnaces are simpler than the latter. In a word, the choice of furnace is mainly based on the heat treatment performance of the product.
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