Heat treatment process of long shaft

A heat treatment device and long shaft technology, applied in the field of heat treatment, can solve the problems of bar surface damage, hard collision, etc., and achieve the effect of enhancing hardness

Active Publication Date: 2020-06-19
杭州大路金属热处理有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, during the feeding process of the bar, it is easy to have a hard collision with other parts, which may easily cause damage to the surface of the bar.

Method used

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  • Heat treatment process of long shaft
  • Heat treatment process of long shaft
  • Heat treatment process of long shaft

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Embodiment Construction

[0040] The present invention will be further described in detail below with reference to the accompanying drawings.

[0041] refer to figure 1 , which is a heat treatment process for a long shaft disclosed in the present invention, comprising the following steps: step S1, selecting a heat treatment device, and feeding the long shaft to the heat treatment device; step S2, quenching, and the quenching temperature is 830 ℃-850 ℃; step S3 , cooling, the long shaft is cooled by spraying, and the cooling temperature is 24 ℃-26 ℃; step S4, tempering, the tempering temperature is divided into a first-stage tempering and a second-stage tempering, and the first-stage tempering temperature is 710 ℃-750 ℃, the second-stage tempering temperature is 500 ℃-600 ℃; step S5, blanking; and the conveying speed of the long axis in steps S2-S4 is 400 mm / min-600 mm / min.

[0042] After the long-axis bar is loaded, it is first quenched, and the quenching temperature is 830°C-850°C, and then it quickl...

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Abstract

The invention relates to a heat treatment process of a long shaft. The heat treatment process comprises the following steps that S1, a heat treatment device is selected, and the long shaft is fed to the heat treatment device; S2, quenching is carried out, wherein the quenching temperature ranges from 830 DEG C to 850 DEG C; S3, cooling is conducted, wherein the long shaft is cooled in a spraying mode, and the cooling temperature ranges from 24 DEG C to 26 DEG C; S4, tempering is conducted, wherein the tempering temperature is divided into first-stage tempering temperature and second-stage tempering temperature, the first-stage tempering temperature ranges from 710 DEG C to 750 DEG C, and the second-stage tempering temperature ranges from 500 DEG C to 600 DEG C; and S5, discharging is carried out. The heat treatment process has the effects of reducing bar damage and being good in heat treatment effect.

Description

technical field [0001] The invention relates to the technical field of heat treatment, in particular to a heat treatment process for a long axis. Background technique [0002] With the rapid development of the construction industry, the market demand for long rod parts such as steel bars is also increasing. The hot-rolled steel bars are quenched and tempered at high temperature to improve the performance of steel bars. Existing steel bar quenching and tempering heat treatment equipment usually uses coils to quench, cool and temper the steel bar at high temperature, and the mechanical properties of the steel bar after the quenching and tempering treatment are optimized and improved. [0003] For example, the Chinese Patent Publication No. CN2811317Y discloses an intermediate frequency quenching and tempering heat treatment equipment for long rod-like workpieces. It is composed of sensors arranged concentrically and installed on a bracket. The brackets are installed on two ga...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D9/28
CPCC21D9/28
Inventor 费张兴
Owner 杭州大路金属热处理有限公司
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