Multi-stage tempering process of automobile leaf spring

Abstract

The invention discloses a multi-segment tempering technology of an automobile steel plate spring, and belongs to the technical field of heat treatment tempering technologies of the steel plate spring. A whole multi-segment tempering technology designed by an inventor is matched with a dedicated device, after tempering every time, reasonable cooling is carried out, next-time tempering is carried out, and the phenomenon that tempering is insufficient is avoided. The quenching technology temperature is controlled through a numeric terminal, the temperature curve approaching to the design technology is achieved, the ideal material structure and the ideal performance can be obtained, and the finished product quality of the steel plate spring is greatly improved. During operation implementation of tempering equipment, full-process automation is achieved, manual consumption is reduced, a worker does not need to make contact with the tempering environment with the close distance, remote operation is needed, and safety and health coefficients are high. In addition, full-automatic equipment reduces the production cost, and the technology is suitable for large-scale quantity production of small sample test pieces.

Description

Technical field [0001] The invention belongs to the technical field of heat treatment and tempering process for leaf springs, and specifically relates to a multi-section tempering process for automobile leaf springs. Background technique [0002] At present, in the actual production process, the tempering process of leaf springs is generally a single tempering, but the tempering of this type of steel cannot be replaced by a long-term tempering instead of multiple short-term tempering. This is because the transformation of retained austenite into martensite is carried out during tempering and cooling. Therefore, after each tempering, it must be kept warm for a period of time and then air-cooled to room temperature before the next tempering. Otherwise, the phenomenon of insufficient tempering is likely to occur (insufficient tempering means that the retained austenite in the steel is not completely eliminated). [0003] In addition, the current tempering process of leaf springs can...

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Problems solved by technology

[0003] In addition, the tempering process of the current leaf spring cannot be digitally monitored, and the temperature curve after tempering cannot be precisely controlled, so that it is in line with the expected design process temperature curve, and ultimately the desired material structure and temperature cannot be obtained. performance, so that there is a certain gap between the actual performance of the leaf spring and the design expectation

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