CN114525381A - Laser patterning local heat treatment method and hardware treated by same - Google Patents
Laser patterning local heat treatment method and hardware treated by same Download PDFInfo
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- CN114525381A CN114525381A CN202111376479.5A CN202111376479A CN114525381A CN 114525381 A CN114525381 A CN 114525381A CN 202111376479 A CN202111376479 A CN 202111376479A CN 114525381 A CN114525381 A CN 114525381A
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- laser
- hardware
- heat treatment
- fitting
- pattern
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/06—Surface hardening
- C21D1/09—Surface hardening by direct application of electrical or wave energy; by particle radiation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0093—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for screws; for bolts
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/40—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rings; for bearing races
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention discloses a laser patterning local heat treatment method and a hardware tool processed by the method. The invention has the following beneficial effects: (1) the patterned laser spots improve the overall wear resistance and service life of the hardware fitting and maintain good plasticity and toughness; (2) the hardware subjected to the reticulate pattern laser spot treatment can store more lubricating oil for a long time, provides a continuous lubricating and rust-proof function for the hardware and prolongs the service life of the hardware; (3) the complete coverage of circumferential reinforcement of a key wear area is realized by rotating the hardware fitting; (4) the wear resistance, the plastic toughness and the service life of the hardware fitting are integrally improved.
Description
Technical Field
The invention relates to the technical field of electric power fittings, in particular to a laser patterning local heat treatment method and a laser patterning local heat treatment method.
Background
Metal accessories made of iron or aluminum widely used for power transmission lines are called hardware fittings. The hardware tool is usually required to bear large pulling force in the using process, the reliability of the hardware tool is directly related to whether a power grid can run stably, and the hardware tool is an important component of a power transmission line. China is wide in breadth, but resource distribution is extremely unbalanced, more than 80% of energy resources are distributed in the west and north, and the high-amplitude high-frequency swing exists between the link fittings due to the fact that the geographical environment of part of regions is complex, the climate is severe, the day and night temperature difference and the instantaneous wind power are large, so that the link fittings are partially abraded and invalid, the safety of a power transmission line is affected, and the power transmission cost is increased. And because the fitting forms of the connecting hardware fittings are different, the positions of the connecting hardware fittings to be strengthened are different according to the actual requirements in the using process. The connection fitting strengthened by the existing strengthening modes such as integral heat treatment, hot galvanizing, blackening and the like can not realize flexible change of the size of the strengthened part, the performance index of the strengthened connection fitting can not meet the actual requirement, a higher failure proportion exists in the use process, and the service life of the fitting and the safety of a power transmission line can not be effectively improved.
For example, a chinese patent document discloses a "laser strengthening method for electric power fittings", whose application number CN201910612937.7, includes the following steps: the laser processing method comprises the steps of first laser cleaning, fixing, setting the size of a light spot, setting the rotating angle and the rotating direction, laser strengthening and second laser cleaning, wherein a laser is connected with a laser through a laser head of a vibrating mirror in a laser strengthening device, and in the laser strengthening process, the electric power fitting is always arranged in the scanning range of the laser head of the vibrating mirror, so that the surface processing of the electric power fitting can be realized only by carrying out single-pass laser quenching with variable size. The method has the disadvantages that the strengthening degree of the strengthening area of the U-shaped ring is consistent, so that the integral hardness of the strengthening area is greatly improved, the plasticity and toughness are greatly reduced, and the hardened layer is easy to fall off along with the time.
Disclosure of Invention
The invention provides a laser patterning local heat treatment method and a hardware tool processed by the method, aiming at overcoming the problems that the strengthening mode in the prior art is low in flexibility and easy to cause the hardened layer to fall off, and meeting the requirements of strength, hardness and plastic toughness of different areas.
In order to achieve the purpose, the invention adopts the following technical scheme:
a laser patterning local heat treatment method is characterized in that laser surface quenching is carried out on a key wear area of a part to be heat treated, and the shape of a laser spot is patterned.
The invention is characterized in that the traditional laser spot shape is changed, but a patterned shape is adopted, the patterns comprise, but are not limited to, a reticulate pattern, a similar 8-shaped pattern, a similar delta-shaped pattern, a similar □ -shaped pattern and the like, the larger the pattern area is, the higher the laser energy is, the higher the surface hardness of the part is, the stronger the wear resistance is, the corresponding plasticity and toughness are lower, and the patterns are selected according to the requirements of the strength and the plasticity and toughness of different regions of different hardware fittings. The pattern can be generated by vibration of the vibrating mirror, and the hardness of the material can be obviously improved so as to improve the wear resistance and the service life of the hardware fitting.
Preferably, the pattern is in the form of a grid.
Selecting latticed laser spots to act on the key wear area, wherein the hardness of a reticulate pattern part acted by laser is greatly improved, and the plasticity and toughness are reduced; the diamond part of the key wear area still keeps better plastic toughness of the base material because the diamond part is not subjected to laser heat treatment, and the diamond part can provide plastic toughness compensation for the reticulate pattern part, so that the whole wear resistance and the service life of the hardware are improved, and meanwhile, the good plastic toughness is still kept; on the other hand, after the hardware fitting acted by the latticed laser spots is used for a period of time, the abrasion degree of the diamond part is higher, the abrasion degree of the reticulate part is lower, a plurality of diamond-shaped pits are formed in the surface of the key abrasion area, more lubricating oil can be stored in the pits, the continuous lubricating and rust-proof function is provided for the hardware fitting, and the service life of the hardware fitting is prolonged.
Preferably, the pattern is a solid pattern, and the pattern width is larger at a portion of the critical wear region where the degree of wear is larger.
The laser energy input is more at the part with wider width, the hardness is greatly improved, and the plasticity and toughness are reduced; the part with the narrower width still keeps the better plastic toughness of the base material due to less laser energy input, so that plastic toughness compensation is provided for other parts, the solid patterns can be triangular, rectangular, 8-shaped, Z-shaped and the like, and the adjustment and selection are carried out according to the requirements of wear resistance and plastic toughness of the hardware fitting. Furthermore, the pattern can also be in a shape of triangle, rectangle, 8-shaped, Z-shaped and the like, and the inside of the pattern is filled in a reticulate pattern, so that the continuous lubrication and rust prevention can be ensured while the laser intensity is flexibly adjusted.
Preferably, the laser spot size is 1 mm larger than the edge of each side of the critical wear area.
Ensuring that the laser spot covers the critical wear area.
Preferably, for the annular key wear region, the key wear region is uniformly divided into a plurality of parts along the circumferential direction, the part to be heat-treated is rotated, and laser patterning heat treatment is sequentially performed on each part.
Annular region sets up along circumference, to reticulation form pattern, carries out circumference all standing through dividing the region, for example divide into 6 parts, and rotatory gold utensil 60 at every turn need not rotatory laser head when guaranteeing the circumference and covering, guarantees the precision.
Preferably, the part to be heat treated is continuously rotated to perform laser patterned localized heat treatment for the annular critical wear region.
And for the solid pattern, continuous laser heat treatment can be carried out, and uniform heat treatment in the circumferential direction is ensured.
Preferably, the part after the laser patterning local heat treatment is subjected to an oil immersion treatment, and the oil is a metal rust preventive oil.
Improve the lubricating and antirust performance.
Preferably, before heat treatment, polishing, cleaning and drying treatment are carried out on the key wear area of the part to be heat treated, wherein the polishing enables the roughness of the key wear area of the hardware to reach Ra 6.3.
The hardware key wear area is cleaned without impurities such as oil stains, and the drying can ensure that the hardware key wear area is not rusted before the laser patterning local heat treatment.
A hardware tool having a localized heat treatment patterned with a laser, a critical wear region of the hardware tool being heat treated.
Preferably, the hardware is a U-shaped ring or a bolt.
The arc inner area of the U-shaped ring and the side face of the bolt can be strengthened, and the plastic toughness is ensured.
Therefore, the invention has the following beneficial effects: (1) the patterned laser spots improve the overall wear resistance and service life of the hardware fitting and maintain good plasticity and toughness; (2) the hardware subjected to the reticulate pattern laser spot treatment can store more lubricating oil for a long time, provides a continuous lubricating and rust-proof function for the hardware and prolongs the service life of the hardware; (3) the complete coverage of circumferential reinforcement of a key wear area is realized by rotating the hardware fitting; (4) the wear resistance, the plastic toughness and the service life of the hardware fitting are integrally improved.
Drawings
FIG. 1 is a schematic view of a U-shaped ring according to the present invention.
Fig. 2 is a plan view of embodiment 1 of the present invention.
Fig. 3 is a schematic structural diagram of embodiment 2 of the present invention.
Fig. 4 is a schematic structural diagram of embodiment 3 of the present invention.
Fig. 5 is a schematic structural diagram of embodiment 4 of the present invention.
Detailed Description
The invention is further described with reference to the following detailed description and accompanying drawings.
Example 1
As shown in fig. 1 and 2, a laser patterning local heat treatment method and a metal tool with laser patterning local heat treatment are provided, the metal tool is a U-shaped ring 1, and a bending section 11 at the bottom of the U-shaped ring is a critical wear area. The method comprises the following specific steps: s1, polishing, cleaning and drying the bent section of the U-shaped ring, wherein the surface roughness of the U-shaped ring is Ra6.3 after polishing, the cleaning ensures that the key wear area has no impurities such as oil stains and the like, and the drying ensures that the key wear area of the hardware fitting is not rusted before heat treatment;
s2, selecting reticulate pattern laser light spots, and enabling the four sides of the reticulate pattern laser light spots to be 1 mm larger than the edge of a U-shaped ring key wear area;
s3, clamping the U-shaped ring on the clamp and placing the U-shaped ring below the laser head, wherein a half height plane of a key abrasion area covered by the laser spot in the height direction is located at a laser focus plane;
s4, carrying out laser reticulate pattern local heat treatment on the bent section of the U-shaped ring, equally dividing a key wear area into 6 parts along the circumferential direction, clockwise rotating the U-shaped ring for 60 degrees each time, and sequentially carrying out laser patterning heat treatment on each part;
s5, carrying out oil immersion treatment on the U-shaped ring subjected to the local heat treatment of the laser reticulate pattern, wherein the oil is metal anti-rust oil.
The hardness of the reticulate pattern part 12 acted by laser is greatly improved, and the plasticity and toughness are reduced; the diamond-shaped part 13 still maintains better plastic toughness of the base material because of not being subjected to laser heat treatment, and the diamond-shaped part can provide plastic toughness compensation for the reticulate pattern part, so that the hardware still maintains good plastic toughness while improving the overall wear resistance and service life of the hardware; after the hardware fitting acted by the latticed laser light spots is used for a period of time, the abrasion degree of the diamond part is high, the abrasion degree of the reticulate part is low, a plurality of diamond-shaped pits are formed in the surface of the bending section, and the pits can store more metal rust-proof oil, so that a continuous lubricating and rust-proof function is provided for the hardware fitting, and the service life of the hardware fitting is prolonged.
Example 2
As shown in fig. 3, a laser patterning local heat treatment method and a hardware with laser patterning local heat treatment are provided, the hardware is a bolt 2, and a side smooth section of the bolt 2 is a key wear area. The method steps are substantially the same as in example 1 except that the laser spot is a solid "8" shaped pattern 21. The bolt 2 is clamped by a jig capable of rotating at a high speed and rotated at a high speed of about 10 r/s.
The hardness of two wider parts of the key wear area of the bolt after the local heat treatment of the laser 8-shaped pattern is greatly improved, and the ductility and toughness are reduced; the widths of the middle part and the two end parts of the key wear area are narrower, the better plastic toughness of the base material is still kept due to less laser energy input, and the middle part and the two end parts can provide plastic toughness compensation for the rest parts, so that the whole service life of the bolt is prolonged, and meanwhile, the good plastic toughness is still kept. The bolt of embodiment 2 is suitable for and cooperates with U type ring ear 14, and bolt 2 inserts in proper order in the through-hole of two ears 14, and the part that the critical wear zone width is wider cooperates with the through-hole inner wall of two ears 14 respectively, promotes the wearability in these two places.
Example 3
As shown in fig. 4, a laser patterning local heat treatment method and a laser patterning local heat treated hardware tool have the same steps as those of embodiment 2, except that the laser spot has a solid rectangular pattern 22. And the bolt 2 does not turn.
The hardness of the middle part of the key wear area of the bolt after the local heat treatment of the laser rectangular pattern is greatly improved, and the plasticity and toughness are reduced; the outer side part of the key wear area still keeps better plastic toughness of the base material because the outer side part is not subjected to laser heat treatment, and the outer side part can provide plastic toughness compensation for the middle part, so that the service life of the whole bolt is prolonged, and meanwhile, the bolt still keeps good plastic toughness.
Example 4
As shown in fig. 5, a laser patterning local heat treatment method and a metal tool with laser patterning local heat treatment method have substantially the same steps as those of embodiment 2, except that the laser spot has a triangular outline and a cross-hatched inside.
The hardness of the right side of the triangle of the bolt after the local heat treatment of the laser triangle reticulate pattern 23 is greatly improved, and the plasticity and toughness are reduced; the left part of the key wear area still keeps better plastic toughness of the base material due to low heat treatment degree, the left part can provide plastic toughness compensation for the right part, and the diamond-shaped part inside the triangle can provide plastic toughness compensation for the reticulate pattern part, so that the whole service life of the bolt is prolonged while good plastic toughness is still maintained. Meanwhile, the worn diamond-shaped part of the bolt forms a pit which can store more metal antirust oil, so that a continuous lubricating and antirust function is provided for the hardware fitting, and the service life of the hardware fitting is prolonged.
Claims (10)
1. A laser patterning local heat treatment method is characterized in that laser surface quenching is carried out on a key wear area of a part to be heat treated, and the shape of a light spot of the laser is patterned.
2. The method of claim 1, wherein the pattern is a grid.
3. The laser patterning local thermal processing method of claim 1, wherein the pattern is a solid pattern, and the pattern width is larger at the parts with larger abrasion degree in the key abrasion area.
4. The method of claim 1, wherein the laser spot size is greater than 1 mm above the edge of each side of the critical wear area.
5. The laser patterning local thermal processing method of claim 2, wherein for the annular key wear region, the key wear region is uniformly divided into a plurality of parts along the circumferential direction, the part to be thermally processed is rotated, and the laser patterning thermal processing is performed on each part in turn.
6. The laser-patterned localized heat treatment method of claim 3, wherein the laser-patterned localized heat treatment is performed on the part to be heat-treated in a continuous rotation for a critical wear region of the ring shape.
7. The laser-patterned local heat treatment method according to claim 1, wherein the part subjected to the laser-patterned local heat treatment is subjected to an oil immersion treatment, and the oil is a metal rust preventive oil.
8. The laser patterning local thermal treatment method of claim 1, wherein before the thermal treatment, the critical wear area of the part to be thermally treated is polished, cleaned and dried, and the polishing is performed to make the roughness of the critical wear area of the hardware tool reach Ra 6.3.
9. A fitting locally heat treated by laser patterning, characterized in that critical wear areas of the fitting have been subjected to a heat treatment according to any of claims 1-8.
10. The hardware fitting is characterized in that the hardware fitting is a U-shaped ring or a bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111376479.5A CN114525381A (en) | 2021-11-19 | 2021-11-19 | Laser patterning local heat treatment method and hardware treated by same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111376479.5A CN114525381A (en) | 2021-11-19 | 2021-11-19 | Laser patterning local heat treatment method and hardware treated by same |
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| CN114525381A true CN114525381A (en) | 2022-05-24 |
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| CN110093480A (en) * | 2019-04-02 | 2019-08-06 | 上海乾岳投资管理有限公司 | NC cutting tool blade laser surface intensified technique method |
| CN110205448A (en) * | 2019-07-09 | 2019-09-06 | 杭州御兴科技有限公司 | A kind of laser strengthening method of electric armour clamp |
| CN112458242A (en) * | 2020-10-29 | 2021-03-09 | 江苏拜欧尼克智能科技有限公司 | Laser bionic strengthening method for heavy-load titanium alloy die forging die |
| CN113621789A (en) * | 2021-08-10 | 2021-11-09 | 国网新疆电力有限公司电力科学研究院 | Laser strengthening device and method for electric power fitting |
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