Laser heat treatment strengthening process

A laser heat treatment and process technology, applied in the field of laser applications, can solve the problems of many production processes and high production costs, and achieve the effects of saving processes, improving service life and improving processing speed.

Inactive Publication Date: 2012-07-11
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a laser heat treatment intensification process using laser heat treatment on the edge of the pot, so as to solve the problems in the prior art that after the frying pan is pressure formed, the edge of the pot is flanged and the production process is many, and the production cost is high.

Method used

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  • Laser heat treatment strengthening process

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Effect test

Embodiment 1

[0021] For the processed wok with a diameter of 200 mm, the laser power is 1200 watts, the laser beam scanning speed is 15 mm / s, and the spot diameter is 2 mm. The laser makes the surface of the workpiece reach the melting temperature of the material, and the heat treatment time is 40 seconds, reaching Laser remelting refines the grain effect.

[0022] A pressure deformation test was carried out on the treated wok. Compared with the conventional treatment technology, the anti-deformation ability is equivalent, the heat treatment speed has been increased by 60%, and the production cost has been reduced. The surface hardness of the frying pan is HB=360, and the thickness of the surface nitrided layer and hardened layer is 0.6 mm.

Embodiment 2

[0024] For the processed wok with a diameter of 250 mm, the laser power is 1000 watts, the laser beam scanning speed is 10 mm / s, and the spot diameter is 3 mm. The laser makes the surface of the workpiece reach the melting temperature of the material, and the heat treatment time is 30 seconds, reaching Laser remelting refines the grain effect.

[0025] A pressure deformation test was carried out on the treated wok. Compared with the conventional treatment technology, the anti-deformation ability is equivalent, the heat treatment speed has been increased by 60%, and the production cost has been reduced. The surface hardness of the frying pan is HB=350, and the thickness of the surface nitrided layer and hardened layer is 0.5 mm.

Embodiment 3

[0027] For the processed wok with a diameter of 300 mm, the laser power is 1500 watts, the scanning speed of the laser beam is 20 mm / s, and the diameter of the spot is 1 mm. The laser makes the surface of the workpiece reach the melting temperature of the material, and the heat treatment time is 50 seconds.

[0028] A pressure deformation test was carried out on the treated wok. Compared with the conventional treatment technology, the anti-deformation ability is equivalent, the heat treatment speed has been increased by 60%, and the production cost has been reduced. The surface hardness of the frying pan is HB=400, and the thickness of the surface nitrided layer and hardened layer is 1 mm.

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Abstract

The invention relates to the field of laser application, in particular to a laser heat treatment strengthening process. A laser technique is used for performing laser remelting strengthening heat treatment, selected laser power ranges from 1000 to 1500w, laser beam scanning speed ranges 10 to 20mm/s, spot diameter ranges from 1 to 3mm, the laser enables the surface of a workpiece to reach a material melting temperature, and heat treatment time ranges from 30 to 50s. The process utilizes the laser to perform hardening treatment, the laser surface is hardened when laser beams irradiate on the surfaces of materials, the laser is absorbed by the materials to become heat energy, and the surface material is heated to warm up so as to enable the material to have solid phase change. After the laser beams are cut off or removed, cooling speed of the surfaces of the materials is fast, grain refinement in metal can be achieved. The laser metal surface hardening treatment has the advantages of being thick in hardening layer, good in treatment quality, high in treatment efficiency, low in operating cost and the like. The laser heat treatment strengthening process can laser high-energy beams for heating metal surfaces transiently, cooling is performed depending on metal materials, grain refinement is preformed on material laser irradiation surfaces, and strength is enhanced.

Description

technical field [0001] The invention relates to the field of laser applications, in particular to a laser heat treatment strengthening process. Background technique [0002] Produce the wok of 200 millimeters of diameter pot edge after pressure forming, when rapid cooling rapid heating is used, and pot can be out of shape. At present, the deformation problem is usually solved by flanging the edge of the pot, but the production process is increased, especially the three-layer composite metal plate process is more complicated, and the production cost is correspondingly increased. good workmanship. [0003] Laser heat treatment is a surface heat treatment technology, which uses laser to heat the surface of metal materials to achieve surface heat treatment. Laser heating has extremely high power density, that is, extremely high power is concentrated on the unit area of ​​the laser irradiation area. Due to the extremely high power density, the conduction and heat dissipation o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D9/00C21D1/09
Inventor 龙康王胜刚
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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