Laser quenching process for reducing width of laser quenching lap joint soft belt

A technology of laser quenching and soft belt, which is applied in the field of laser heat treatment, can solve the problems of uneven quenching hardening layer, etc., and achieve the effect of increasing the depth of quenching layer, increasing the entrance light spot, and shortening the collimation length

Pending Publication Date: 2021-09-07

DANYANG HONGTU LASER TECH

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AI-Extracted Technical Summary

Problems solved by technology

In the case of multi-pass laser scanning, there will be a certain degree of overlap between two adjacent hardened zones, and part of the former laser hardened zone will be reheated by the adjacent subsequent laser, and the formed Martensite Th...

Method used

B, select the laserline laser of multimode 1020um wavelength, 1000um fiber core diameter as laser equipment, and it is adjusted, collimation degree is adjusted to 75mm by 100mm, integrating mirror is adjusted to 30*5mm, adjustment process The moving speed in the parameters is 160mm/min, and the power is 3.3kw. Adjust the emission direction of the laser beam so that the energy of the spot is offset by 10° to the overlapping overlapping end, and the overlapping rate is set to 10%, so as to realize the concentration of the energy at the right end and reduce the Small phantom spots.

B, select the laserline laser of multimode 1020um wavelength, 1000um fiber core diameter as laser equipment, and it is adjusted, collimation degree is adjusted to 75mm by 100mm, integrating mirror is adjusted to 30*5mm, adjustment process The moving speed in the parameters is 170mm/min, and the power is 3.2kw. Adjust the emission direction of the laser beam so that the energy of the spot is shifted to the overlapped end by 9°. Small phantom spots.

B, select the laserline laser of multimode 1020um wavelength, 1000um fiber core diameter as laser equipment, and it is adjusted, collimation degree is adjusted to 75mm by 100mm, integrating mirror is adjusted to 30*5mm, adjustment process The moving speed in the parameters is 170mm/min, and the power is 3.4kw. Adjust the emission direction of the laser beam so that the energy of the spot is shifted to the overlapped end by 8°, and the overlapping rate is set to 12%, so as to realize the concentration of the energy at the right end and reduce the Small phantom spots.

B, select the laserline la...

Abstract

The invention relates to a laser quenching process for reducing the width of a laser quenching lap joint soft belt. The incident light spot can be effectively increased by shortening the collimation length, the heating time of a light spot region can be effectively increased within the same time by increasing the area of an integral mirror, and the heating time of a light spot in a heating region can be effectively prolonged by reducing the moving speed, the heating depth is enhanced, the depth of a quenching layer is effectively improved, light spot energy is made to deviate towards the lap joint overlapping end by adjusting the emitting direction of a laser beam, energy concentration at the right end can be effectively achieved, and virtual spots are reduced. Through adjustment of technological parameters, the width of the tempered soft belt of the obtained laser quenching hardened layer can be reduced to 0.2-0.3 mm from 0.5-1.0 mm in the original technology, the hardness of the soft belt is not obviously reduced, and the ideal effect is achieved.

Technology Topic

Lap jointLaser beams +4

Image

Examples

Experimental program(4)

Example Embodiment

[0025] Example 1

[0026] A method of reducing laser hardening soft lap width of the laser hardening process, comprising the steps of:

[0027] A, treatment of cleaning the surface of the quenching roll, to ensure compliance with the surface laser hardening requirements;

[0028] B, selection of multi-mode 1020um wavelength, fiber core diameter laserline 1000um laser as a laser device, and subjected to calibration, the collimation is adjusted by 100mm to 75mm, with the integrated mirror is adjusted to 30 * 5mm, adjusting the process parameters a moving speed of 180mm / min, power of 3.5kw, adjust the emission direction of the laser beam, so that the energy shift 10 ° to spot overlap the overlapped ends, overlapping ratio to 10%, right centralized energy, reduced spot virtual .

[0029] C, with a calibration complete laserline laser treatment roll surface hardening hardening multi-pass laser scanning;

[0030] D, on completion of the roll laser hardening hardened layer hardness measured by a laser, such as hardness profile obtained Figure 4 Indicated.

[0031] By the adjustment, the laser quenching and tempering the soft rolls in the width of 0.2-0.3 mm, and a flexible tape obvious decrease in hardness, quenching and tempering hardness laser at 600HV or more flexible tape, only normal regions of low 100-200HV, compared in the original process improved significantly.

Example Embodiment

[0032] Example 2

[0033] A method of reducing laser hardening soft lap width of the laser hardening process, comprising the steps of:

[0034] A, treatment of cleaning the surface of the quenching roll, to ensure compliance with the surface laser hardening requirements;

[0035] B, selection of multi-mode 1020um wavelength, fiber core diameter laserline 1000um laser as a laser device, and subjected to calibration, the collimation is adjusted by 100mm to 75mm, with the integrated mirror is adjusted to 30 * 5mm, adjusting the process parameters a moving speed of 170mm / min, power of 3.4 kW, the emission direction of the laser beam is adjusted so that the spot 8 ° to the energy shift overlapped ends overlapped, overlapping ratio of 12% is set, the right end of centralized energy, reduced spot virtual .

[0036] C, with a calibration complete laserline laser treatment roll surface hardening hardening multi-pass laser scanning;

[0037] D, on completion of the roll laser hardening layer hardness measured by a laser hardening, laser hardening and tempering soft roll width of 0.2-0.3 mm are obtained, and a flexible tape obvious decrease in hardness, the hardness of the laser quenching and tempering in the flexible tape 600HV above, only lower than the normal area 100-200HV, improved significantly compared to the original process.

Example Embodiment

[0038] Example 3

[0039] A method of reducing laser hardening soft lap width of the laser hardening process, comprising the steps of:

[0040] A, treatment of cleaning the surface of the quenching roll, to ensure compliance with the surface laser hardening requirements;

[0041] B, selection of multi-mode 1020um wavelength, fiber core diameter laserline 1000um laser as a laser device, and subjected to calibration, the collimation is adjusted by 100mm to 75mm, with the integrated mirror is adjusted to 30 * 5mm, adjusting the process parameters a moving speed of 160mm / min, power of 3.3kw, adjust the emission direction of the laser beam, so that the energy shift 10 ° to spot overlap the overlapped ends, overlapping ratio to 10%, right centralized energy, reduced spot virtual .

[0042] C, with a calibration complete laserline laser treatment roll surface hardening hardening multi-pass laser scanning;

[0043] D, on completion of the roll laser hardening layer hardness measured by a laser hardening, laser hardening and tempering soft roll width of 0.2-0.3 mm are obtained, and a flexible tape obvious decrease in hardness, the hardness of the laser quenching and tempering in the flexible tape 600HV above, only lower than the normal area 100-200HV, improved significantly compared to the original process.

PUM

Property	Measurement	Unit
Hardness	>= 600.0

Description & Claims & Application Information

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