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Quenching and tempering method for screwdriver heads and sleeves

A sleeve and bit technology, which is applied in the field of tempering and quenching of bit and sleeve, can solve the problems of slow cooling speed, singleness, and poor cooling effect, and achieve the goal of reducing corrosion, improving cooling capacity, and improving cooling effect Effect

Pending Publication Date: 2021-11-05
闽侯县捷恒热处理有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the defects of the prior art, provide a quenching and tempering method for bits and sleeves, and solve the problem of poor cooling effect in the tempering and quenching process for bits and sleeves , and the cooling rate is slow, generally it is only a matter of using a single water, brine or oil for cooling

Method used

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  • Quenching and tempering method for screwdriver heads and sleeves

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1: First, put the bit and the sleeve together on the lifting platform, and make the lifting platform rise, and then the lifting platform drives the bit and the sleeve to rise into the heating end of the high-frequency heating furnace, and heat through high-frequency The heating end of the furnace heats the bit and the sleeve. After heating the bit and the sleeve to AC3+(20-30)°C, the lifting table is moved down, because high-efficiency annular spraying is installed on the upper and lower sides of the outside of the lifting table. device and low-efficiency annular spray device, so the normal-temperature salt water can be sprayed towards the high-temperature batch head and sleeve through the low-efficiency ring spray device first. After 2 seconds with the sleeve, the high-efficiency annular spray device is used to spray water at a temperature of 5°C to the bit and sleeve after the initial cooling, and the quenching is completed. After quenching, the lifting table d...

Embodiment 2

[0034] Example 2: First, put the bit and the sleeve together on the lifting platform, and make the lifting platform rise, and then the lifting platform drives the bit and the sleeve to rise into the heating end of the high-frequency heating furnace, and heat through high-frequency The heating end of the furnace heats the bit and the sleeve. After heating the bit and the sleeve to AC3+(30-50)°C, the lifting table is moved down, because high-efficiency annular spraying is installed on the upper and lower sides of the outside of the lifting table. device and low-efficiency annular spray device, so the normal-temperature salt water can be sprayed towards the high-temperature batch head and sleeve through the low-efficiency ring spray device first. After 3 seconds with the sleeve, the high-efficiency annular spray device is used to spray water at a temperature of 1°C to the bit and sleeve after the initial cooling to complete the quenching. After quenching, the lifting table drives ...

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Abstract

The invention discloses a quenching and tempering method for screwdriver heads and sleeves. The method comprises the following steps that Step 1, the screwdriver heads and the sleeves are placed on a lifting platform together, and the lifting platform ascends; and Step 2, the lifting platform drives the screwdriver heads and the sleeves to ascend into the heating end of a high-frequency heating furnace, and the screwdriver heads and the sleeves are heated through the heating end of the high-frequency heating furnace. Normal-temperature saline water is firstly adopted for primary cooling, salt and alkali crystals are separated out from the normal-temperature saline water in the steam film stage and are burst immediately, the steam film is damaged, oxide skins on the surfaces of the screwdriver heads and the sleeves are also broken, thus the cooling capacity of the normal-temperature saline water on the high-temperature screwdriver heads and sleeves can be improved, after a period of time, the screwdriver heads and the sleeves are cooled through low-temperature water, direct contact between the low-temperature water and the high-temperature screwdriver heads and sleeves can be avoided, the low-temperature water can be used for cooling the screwdriver heads and the sleeves, meanwhile, the saline water on the surfaces of the screwdriver heads and the sleeves can be washed away through the low-temperature water, corrosion of the saline water is reduced, and the cooling effect is improved.

Description

technical field [0001] The invention relates to the technical field of tempering and quenching of bit and sleeve, in particular to a quenching and quenching method of bit and sleeve. Background technique [0002] Quenching is a heat treatment method in which steel is heated to 20-30 degrees above Ac3 or Ac1, and then cooled rapidly after heat preservation (usually in cold water, salt water or oil). The purpose is to improve its hardness and wear resistance, while Quenching and tempering is also called "high temperature tempering". Generally, it is customary to perform high temperature tempering on quenched parts. It is called quenching and tempering in heat treatment. Quenching and tempering can make steel have good comprehensive mechanical properties (hardness, toughness) and generally withstand alternating loads. Most of the parts are "quenched and tempered". [0003] At present, in the tempering and quenching process for the bit and the sleeve, the cooling effect is poor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/18C21D9/00C21D1/10
CPCC21D1/18C21D9/0068C21D1/10Y02P10/25
Inventor 易茂华易文斌唐丽
Owner 闽侯县捷恒热处理有限公司