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Heat treatment method of high-temperature-resistant rolling needle

A heat treatment method and high temperature resistant technology, applied in heat treatment furnaces, heat treatment equipment, furnace types, etc., can solve problems such as poor high temperature resistance, and achieve the effects of improving service life and high temperature dimensional stability

Inactive Publication Date: 2013-12-25
常州苏特轴承制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the deficiency of poor high temperature resistance of existing needle rollers, the present invention provides a heat treatment method for high temperature resistant needle rollers

Method used

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Experimental program
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Embodiment Construction

[0011] A heat treatment method for high temperature resistant needle rollers, including workpiece preheating, heat preservation and tempering treatment, characterized in that:

[0012] a. Place the workpiece in an environment of 800°C-900°C for preheating, the preheating time is: 5min-10min;

[0013] b. Heat the workpiece to 1000°C-1200°C and keep it warm for 8min-35min;

[0014] c. Cool the workpiece to normal temperature, and the residence time in the normal temperature stage is: 30min-210min;

[0015] d. Temper the workpiece 3 times, the tempering temperature is 450°C-600°C, and the tempering time is 1.5h-2.5h each time;

[0016] e. Each time tempering is cooled to normal temperature, the residence time in the normal temperature stage is: 30min-210min.

[0017] The heat treatment method of this high-temperature-resistant needle roller improves the high-temperature resistance of the needle roller and the strength of the needle roller through high-temperature tempering, and...

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Abstract

The invention relates to the technical field of production of rolling needles, and in particular relates to a heat treatment method of a high-temperature-resistant rolling needle. The method comprises the following steps of: performing preheating, heat preservation and tempering on a workpiece and specifically comprises the following steps: a, preheating the workpiece in an environment of which the temperature is 800-900 DEG C; b, heating the workpiece to 1000-1200 DEG C, and performing heat preservation for 8-35 minutes; c, cooling the workpiece to the normal temperature; d, tempering the workpiece for three times, wherein the tempering temperature is 450-600 DEG C and the tempering time of each tempering is 1.5-2.5 hours; e, cooling to the normal temperature after each tempering. The rolling needle produced by using the heat treatment method of the high-temperature-resistant rolling needle can be used for a long time in an environment of which the working temperature is lower than 315 DEG C in a using process, and has high high-temperature dimensional stability, high-temperature hardness and high-temperature contact fatigue resistance. By adopting the method, the problem that a needle bearing at a big end of a connecting rod is damaged by high-temperature adhesion when a motor tricycle is in a condition of low speed and high load is solved, and the service life of the needle bearing is prolonged.

Description

technical field [0001] The invention relates to the technical field of needle roller production, in particular to a heat treatment method for high temperature resistant needle rollers. Background technique [0002] At present, the needle roller is SUJ2 or GCr15 bearing steel fully hardened type, and the needle roller has insufficient high temperature resistance: it can be used normally at a temperature lower than 120°C, and can be used normally at a temperature below 150°C for a short time. If it is used above 150°C for a long time, high-temperature annealing will occur, resulting in a decrease in the hardness of the needle roller. After the hardness is reduced, the needle roller will wear out and become invalid. If the needle roller is to be used in an environment with a temperature higher than 180°C, the hardness of the needle roller can only be reduced and damaged. Contents of the invention [0003] In order to overcome the disadvantage of poor high temperature resista...

Claims

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Application Information

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IPC IPC(8): C21D9/26
Inventor 吴亚新
Owner 常州苏特轴承制造有限公司
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