Heat treatment system

Abstract

The invention relates to the technical field of heat treatment, and discloses a heat treatment system. The heat treatment system comprises a heat treatment furnace and a tool positioning frame used for installing of heat treatment parts. The heat treatment furnace comprises a high-temperature heating chamber, a heat preservation transition chamber and a cooling chamber, wherein the high-temperature heating chamber, the heat preservation transition chamber and the cooling chamber are sequentially arranged to be adjacent to one another. Opening-closing doors used for communicating or separatingevery two adjacent chambers are arranged between the high-temperature heating chamber and the heat preservation transition chamber as well as between the heat preservation transition chamber and the cooling chamber. A roller assembly used for transporting the tool positioning frame and the heat treatment parts between the high-temperature heating chamber, the preservation transition chamber and the cooling chamber is installed on the upper portion of a bottom plate of the interior of the heat treatment furnace. A bottom plate of the tool positioning frame is arranged a roller shaft of the roller assembly, and moving of the tool positioning frame between the high-temperature heating chamber, the preservation transition chamber and the cooling chamber is achieved through rotating of the roller shaft. The cooling chamber is internally provided with cooling water jetting holes densely distributed around the cooling chamber. The heat treatment system improves the heat treatment quality of the heat treatment parts effectively.

Description

technical field [0001] The invention relates to the technical field of heat treatment, in particular to a heat treatment system for parts. Background technique [0002] Large shaft parts are widely used in the machinery industry. For example, the wind power spindle in the wind power industry is a typical representative of large shaft parts. In wind turbines, the main shaft of wind power is an important key part connecting the wind wheel and the gearbox or generator. The main raw material is steel ingot, which becomes the main shaft after three main processes of forging, heat treatment and finishing. The heat treatment process is relatively The key is that the quality of its heat treatment directly affects the quality of the final product. [0003] The heat treatment of existing large shaft parts such as wind power main shafts has the following problems: [0004] First, after the parts are heated by the high temperature of the heat treatment furnace, they need to be hoiste...

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Problems solved by technology

[0004] First, after the parts are heated by the high temperature of the heat treatment furnace, they need to be hoisted into the cooling pool for cooling and quenching. When the parts come out of the heat treatment furnace and are hoisted into the cooling pool, the surface temperature will be slowly cooled by the action of the flowing air. If the surface temperature is lower than the critical quenching temperature, the quenching hardness of the surface will not meet the design requirements, resulting in a decrease in the mechanical properties of the product

[0005] Second, when the part enters the cooling pool, the shaft body of the part cannot be immersed in the water at the same time. The lower part of the part first contacts the cooling water, and then gradually immerses in the water from the middle and upper parts

Due to the time difference in quenching of different parts of large shaft parts such as wind power main shafts, the pace of thermal expansion and cold contraction is inconsistent, which may easily lead to deterioration of the surface and even internal stress distribution of large shaft parts such as wind power main shafts. This situation of surface and even internal stress distribution deterioration It can directly lead to the generation of cracks in parts, or in the process of using the product after delivery, subsequent cracks can be generated due to the gradual release of stress, thus causing serious quality accidents of the product

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