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Process for quenching steel plate spring

A leaf spring and process technology, applied in the field of quenching process of leaf springs, can solve the problems of high energy consumption and high cost in the quenching process, and achieve the effects of shortening the holding time, improving the usability, and refining the grains

Inactive Publication Date: 2011-11-16
湖北神风汽车弹簧有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the shortcomings of high energy consumption and high cost of the existing quenching process for spring steel plates, the present invention provides a quenching process for leaf springs. This process can ensure or even effectively improve the performance of the product, compared with the prior art. Reduce energy loss and save energy

Method used

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  • Process for quenching steel plate spring
  • Process for quenching steel plate spring
  • Process for quenching steel plate spring

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] 60Si2Mn leaf spring with V, Cr and B added, plate thickness 9mm, place the leaf spring in a heating furnace and heat it to 930°C for 14 minutes, then continue heating to 1030°C, and keep it at this temperature for 14 minutes, then Quenching the leaf spring in the quenching liquid. After testing, the fatigue life of the obtained product is ≥180,000 times.

Embodiment 2

[0016] 60Si2Mn leaf spring, plate thickness 15 mm, place the leaf spring in a heating furnace and heat it to 940°C for 15 minutes, then continue heating to 1040°C, and keep it at this temperature for 15 minutes, then place the leaf spring in the quenching liquid Medium quenching. After testing, the fatigue life of the obtained product is ≥180,000 times.

Embodiment 3

[0018] 60Si2Mn leaf spring with V, Cr and B added, the plate thickness is 25mm, place the leaf spring in a heating furnace and heat it to 950°C for 17 minutes, then continue heating to 1050°C, and keep it at this temperature for 17 minutes, then Quenching the leaf spring in the quenching liquid. After testing, the fatigue life of the obtained product is ≥180,000 times.

[0019] The quenching treatment of medium and high carbon Si-Mn alloy steel is mainly to ensure that the leaf spring is fully austenitized during the heat treatment process, so that the alloy elements can be integrated into the austenite and strengthen the matrix. The invention controls the size of the austenite grain by simultaneously controlling the heating temperature and the holding time. figure 1 It reflects the change of the microstructure of the leaf spring material at different austenitization temperatures for 35 minutes, of which figure 1 (a) is the microstructure at 910°C, figure 1 (b) is the micro...

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Abstract

The invention provides a process for quenching a steel plate spring, which comprises the following steps of: putting the steel plate spring into a heating furnace, heating to the temperature of between 930 and 950 DEG C, and preheating for 12 to 18 minutes; continuously heating to the temperature of between 1,020 and 1,065 DEG C, and keeping the temperature for 12 to 18 minutes; and putting the steel plate spring into quenching liquid for quenching. By the quenching process, the fatigue life of the steel plate spring can be prolonged, the production energy consumption of a product can be reduced, and production efficiency is improved.

Description

technical field [0001] The invention relates to a quenching process of a leaf spring, which is particularly suitable for quenching medium and high carbon Si-Mn series leaf spring materials used in automobiles, and belongs to the technical field of heat treatment processing of metal materials. Background technique [0002] Leaf springs, especially automobile leaf springs, are important components of various trucks and locomotives. They generally work under conditions of shock, vibration or long-term uniform periodic stress changes. Therefore, the automobile leaf spring must have sufficiently high elastic deformation capacity, good surface quality, excellent fatigue performance, plasticity and toughness. Its mechanical properties depend on the heat treatment process under the premise of material quality assurance. In the heat treatment process of materials, that is, in the process of quenching and tempering, it is necessary to heat to a very high temperature and keep it warm ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D9/02
Inventor 吴礼林伍水华熊金来郑君红
Owner 湖北神风汽车弹簧有限公司
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