Rotary spraying quenching device and rotary spraying quenching method for high-chromium wear-resistant iron castings

Abstract

The invention provides a rotary spraying quenching device and a rotary spraying quenching method for high-chromium wear-resistant iron castings. The rotary spraying quenching device comprises a base,wherein a plurality of rotary disc support assemblies are arranged at the top of the base in a manner of uniform distribution, a rotary disc device is supported at the top of each rotary disc supportassembly, and each rotary disc device is connected with a rotary power device at the bottom of the rotary disc device, and drives the rotary disc device to rotate; and a first support frame device isarranged on the side surface of each rotary disc device, a plurality of spraying devices used for spraying are adjustably installed at the top of each first support frame device, and are connected with a water source through a water supply pipe. The equipment is capable of realizing an integrated quenching technique process for the high-chromium castings, replaces the traditional manual quenchingcontrol manner, and then increases the working efficiency and optimizes the quenching technique process; and meanwhile, the quality of the castings is greatly improved, the rate of unqualified products is lowered, and the surface wear resistance of the high-chromium castings is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of casting quenching, and in particular relates to a rotary spray quenching device and method for high-chromium wear-resistant castings, which are suitable for quenching the outer surface of sand-type high-chromium wear-resistant castings. Background technique [0002] High chromium wear-resistant castings are often used in parts that require wear resistance on heavy machinery, and their performance directly determines the quality of heavy equipment. In order to obtain high wear resistance, high chromium castings need to be quenched. Most of the quenching process still adopts the overall water cooling method for quenching. By manually controlling the quenching process conditions, this operation method has the following problems: [0003] (1) During the quenching process, only one side or part of the workpiece on the workbench can be cooled, and multiple sides or the whole can not be cooled at the same time. ...

AI Technical Summary

Problems solved by technology

[0003] (1) During the quenching process, only one side or part of the workpiece on the workbench can be cooled, and multiple sides or the whole can not be cooled at the same time. The workpiece quenching process can only be realized by artificially changing the cooling direction of the workpiece. The operation process consumes Time-consuming and laborious, and the cooling quality cannot be guaranteed

[0004] (2) During the quenching process, due to the overall water cooling method, the local temperature around the casting will rise during the cooling process, which will affect its quenching effect;

[0005] (3) During the quenching process, the uniformity of the quenching temperature of each part of the workpiece cannot be guaranteed, and internal stress will be generated inside the workpiece during cooling. When it reaches a certain level, the workpiece will be distorted, deformed or even cracked

[0006] (4) During the quenching process, especially for large castings, the entire casting to be quenched is usually placed in a pool filled with water for quenching. The above quenching process cannot guarantee a good control of the quenching temperature curve, which in turn affects The quenching effect of castings cannot be guaranteed, and the surface wear resistance of high chromium castings cannot be guaranteed

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