Laser quenching treatment method and quenched workpiece

A technology of laser quenching and treatment method, applied in the field of heat treatment, can solve the problems of inability to meet the performance requirements of high-hardness workpieces and small surface hardness, achieve good energy-saving effects and economic benefits, improve hardness and strength, and improve the effect of wear resistance.

Active Publication Date: 2016-02-17
PINGGAO GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the surface hardness of materials treated by laser hardening or quenching methods in the prior art is relatively small, which cannot meet the performance requirements of high-hardness workpieces

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The laser quenching treatment method of the present embodiment comprises the following steps:

[0033] 1) Quenching and tempering: heat the workpiece to be treated to 860°C, cool it to room temperature in oil, and then heat it to 560°C for tempering. The tempering holding time is 60 minutes, and cool it to room temperature in oil to obtain the quenched and tempered workpiece;

[0034] 2) bluing treatment: put the quenched and tempered workpiece obtained in step 1) into the bluing treatment solution, and keep it warm at 140° C. for 50 minutes to obtain the quenched and tempered and blued workpiece;

[0035] Described bluish treatment liquid is the aqueous solution of sodium hydroxide, sodium nitrite, sodium nitrate, and wherein the concentration of sodium hydroxide is 16mol / L, and the concentration of sodium nitrite is 3.5mol / L, and the concentration of sodium nitrate is 0.5mol / L L;

[0036] 3) Cleaning: Clean up the tempered and bluish workpiece obtained in step 2): us...

Embodiment 2

[0041] The laser quenching treatment method of the present embodiment comprises the following steps:

[0042] 1) Quenching and tempering: heat the workpiece to be treated to 850°C, cool to room temperature in oil, heat to 550°C and temper for 150min, cool to room temperature in oil, and obtain the quenched and tempered workpiece;

[0043] 2) bluing treatment: put the quenched and tempered workpiece obtained in step 1) into the bluing treatment solution, and keep it warm at 135° C. for 60 minutes to obtain a quenched and tempered and blued workpiece;

[0044] Described bluish treatment liquid is the aqueous solution of sodium hydroxide, sodium nitrite, sodium nitrate, and wherein the concentration of sodium hydroxide is 13mol / L, and the concentration of sodium nitrite is 2mol / L, and the concentration of sodium nitrate is 0.4mol / L ;

[0045] 3) Cleaning: Clean up the tempered and bluish workpiece obtained in step 2: use an alkaline degreasing agent for degreasing treatment, the...

Embodiment 3

[0049] The laser quenching treatment method of the present embodiment comprises the following steps:

[0050] 1) Quenching and tempering: heat the workpiece to be treated to 870°C, cool it to room temperature in oil, then heat it to 570°C and temper for 40 minutes, and cool it to room temperature in oil to obtain the quenched and tempered workpiece;

[0051] 2) bluing treatment: put the quenched and tempered workpiece obtained in step 1) into the bluing treatment solution, and keep it warm at 145° C. for 40 minutes to obtain the quenched and tempered and blued workpiece;

[0052] Described bluish treatment liquid is the aqueous solution containing sodium hydroxide, sodium nitrite, sodium nitrate, wherein the concentration of sodium hydroxide is 17mol / L, and the concentration of sodium nitrite is 4mol / L, and the concentration of sodium nitrate is 0.7mol / L L;

[0053] 3) Cleaning: Clean and degrease the tempered and bluish workpiece obtained in step 2): use a neutral degreasing...

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Abstract

The invention relates to a laser quenching treatment method and a quenched workpiece, and belongs to the technical field of heat treatment. The laser quenching treatment method comprises the following steps: a tempered and blued workpiece is quenched by laser; and the laser quenching treatment has the power of 550-650 w, the laser scanning speed of 1.2-1.8 m / min, the focal distance of 300 mm and the defocusing amount of 30-40 mm. The workpiece treated by the laser quenching treatment method has no fusing phenomenon on the surface; and the metal surface hardness can reach above HV700.

Description

technical field [0001] The invention relates to a laser quenching treatment method and a quenched workpiece, belonging to the technical field of heat treatment. Background technique [0002] In order to improve the overall performance of metal materials, heat treatment is usually used to process materials. Quenching is one of the most commonly used heat treatment methods, which can increase the hardness and strength of materials. In mechanical manufacturing, many important structural parts such as shafts and gears need to have very high hardness, and most of them need to be quenched and tempered. [0003] The Chinese invention patent with the publication number CN102952926A discloses a quenching and tempering treatment method for the eccentric body of a press made of 35CrMo, which adopts the method of heating the workpiece to be treated first, heat preservation, quenching, and then high-temperature tempering treatment. This method can The stress inside the workpiece is eli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/09C21D6/00C21D1/18C23C22/62
CPCC21D1/09C21D1/18C21D6/002C21D6/004C21D2211/001C21D2211/008C22C38/12C22C38/18C23C22/62
Inventor 张丹丹张红恩王安平陈东风
Owner PINGGAO GRP
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