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A Quenching Method for 45# Steel Workpiece

A workpiece and quenching agent technology, applied in the direction of quenching agent, manufacturing tools, heat treatment equipment, etc., can solve problems such as quenching cracking

Active Publication Date: 2015-09-09
珠海市顺志机械制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of quenching cracking, the present invention provides a quenching method for 45# steel workpieces

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The steps of the quenching method for a 45# steel workpiece of the present invention are as follows: Place the workpiece in a heating device, heat it to 885°C, and keep it warm for 1.5 hours; quench it with a quenching agent at 75°C, and temper it at 505°C.

[0016] Wherein, the formula of quenching agent is: Potassium chloride: 5.5kg, sodium chloride 1.5kg, water 93kg.

[0017] The preparation method of the quenching agent is as follows: adding potassium chloride and sodium chloride in the formula quantity into the water in the formula quantity, and stirring evenly.

Embodiment 2

[0019] The steps of a quenching method for a 45# steel workpiece of the present invention are as follows: Place the workpiece in a heating device, heat it to 880°C, and keep it warm for 1 hour; quench it with a quenching agent at 73°C, and temper it at 510°C.

[0020] Wherein, the formula of quenching agent is: Potassium chloride: 5.5kg, sodium chloride 1.5kg, water 93kg.

[0021] The preparation method of the quenching agent is as follows: adding potassium chloride and sodium chloride in the formula quantity into the water in the formula quantity, and stirring evenly.

Embodiment 3

[0023] The steps of a quenching method for a 45# steel workpiece of the present invention are as follows: Place the workpiece in a heating device, heat it to 890°C, and keep it warm for 2 hours; quench it with a quenching agent at 70°C, and temper it at 510°C.

[0024] Wherein, the formula of quenching agent is: Potassium chloride: 6kg, sodium chloride 2kg, water 92kg.

[0025] The preparation method of the quenching agent is as follows: adding potassium chloride and sodium chloride in the formula quantity into the water in the formula quantity, and stirring evenly.

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Abstract

The invention provides a quenching method for 45# steel workpieces. The steps are as follows: place the workpieces in heating equipment, heat them to 880-890°C, and keep them warm for 1-2 hours; Tempering at -510°C; wherein, the quenching agent is composed of the following substances in mass percentage: potassium chloride: 5-6%, sodium chloride 1-2%, and the rest is water. The 45# steel obtained by applying the method of the present invention does not appear quenching cracking.

Description

technical field [0001] The invention belongs to the technical field of material heat treatment, and in particular relates to a quenching method for 45# steel workpieces. Background technique [0002] 45# steel is a high-quality carbon structural steel widely used at present. Since 45# steel has good comprehensive mechanical properties after quenching and tempering treatment, when making some key parts (with a size of Φ5-Φ12), the design drawings Most of them require the selection of cold drawn 45 round steel for quenching and tempering (quenching + high temperature tempering) treatment. [0003] At present, the commonly used quenching method for 45# steel is heating to 840-860°C for brine quenching and tempering at 540°C. During such quenching treatment, quenching and cracking of cold-drawn 45 round steel often occurs, resulting in the scrapping of parts. Hundreds of small shafts with a size of Φ8 were scrapped after heat treatment due to quenching cracks, and hundreds of s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D1/18C21D1/60
Inventor 杨龙兴
Owner 珠海市顺志机械制造有限公司
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