CN103350315A - Method for reproducing ineffective H-type rolling mill sliding plate - Google Patents
Method for reproducing ineffective H-type rolling mill sliding plate Download PDFInfo
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- CN103350315A CN103350315A CN2013102885594A CN201310288559A CN103350315A CN 103350315 A CN103350315 A CN 103350315A CN 2013102885594 A CN2013102885594 A CN 2013102885594A CN 201310288559 A CN201310288559 A CN 201310288559A CN 103350315 A CN103350315 A CN 103350315A
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- sliding plate
- rolling mill
- laser
- quenching
- failed
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- 238000005096 rolling process Methods 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 30
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 27
- 239000010959 steel Substances 0.000 claims abstract description 27
- 238000003754 machining Methods 0.000 claims abstract description 13
- 239000011248 coating agent Substances 0.000 claims abstract description 11
- 238000000576 coating method Methods 0.000 claims abstract description 11
- 238000005516 engineering process Methods 0.000 claims abstract description 11
- 238000010438 heat treatment Methods 0.000 claims abstract description 11
- 238000005299 abrasion Methods 0.000 claims abstract description 5
- 238000010791 quenching Methods 0.000 claims description 24
- 230000000171 quenching effect Effects 0.000 claims description 24
- 230000008439 repair process Effects 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 12
- 229910052751 metal Inorganic materials 0.000 claims description 12
- 238000004372 laser cladding Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 235000013372 meat Nutrition 0.000 claims description 4
- 229910003271 Ni-Fe Inorganic materials 0.000 claims description 3
- 229910018487 Ni—Cr Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000005336 cracking Methods 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 3
- 238000005728 strengthening Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
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- Heat Treatment Of Articles (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention relates to a method for reproducing an ineffective H-type rolling mill sliding plate. The method includes the steps that the machining mode is adopted for carrying out outline correction on the ineffective H-type rolling mill sliding plate, and therefore the outline size of the corrected ineffective H-type rolling mill sliding plate accords with an original design size; a buildup welding technology is adopted for carrying out surface coating and repairing on the ineffective H-type rolling mill sliding plate, wherein the ineffective H-type rolling mill sliding plate is large in abrasion loss, or surface fracturing or steel losing exists in the ineffective H-type rolling mill sliding plate; heat treatment repairing is carried out on the ineffective H-type rolling mill sliding plate. By the adoption of the method, the ineffective H-type rolling mill sliding plate can be repaired effectively, and in comparison with an original rolling mill sliding plate, the repaired rolling mill sliding plate is small in performance difference and can effectively save enterprise spending.
Description
Technical Field
The invention relates to the field of metallurgy, in particular to a remanufacturing method of a failed H-shaped steel rolling mill sliding plate.
Background
The large-scale H-shaped steel production line is mainly used for producing H-shaped steel in a rolling mode, has the advantages of being fast in rolling rhythm, capable of producing products in full specification and the like, and the stability of equipment operation is determined by the performance of sliding plates of key equipment such as a rolling mill and a sawing machine in the production line. The sliding plate can absorb shock and replace the friction of the equipment body, thereby ensuring the service life of the equipment body
The large H-shaped steel is rolled by adopting the special-shaped steel billet, the flange and the web of the steel billet are heated unevenly, so that a buckle appears in the steel rolling process, and particularly, the rolling in the rolling mill area is unstable, so that the sliding plate is frequently damaged, and the smooth rolling is influenced.
The main causes of rolling mill skid plate damage include: the rolling mill sliding plate causes the surface abrasion of the sliding plate to be increased and the surface to be cracked due to the iron scale; the rolling mill sliding plate is deformed, the rolled meat falls and even breaks due to overlarge impact of the rolled piece, and the equipment cannot be normally used. In the prior art, once a rolling mill sliding plate is damaged, the rolling mill sliding plate can only be discarded, and a new rolling mill sliding plate is used. The frequent replacement of the rolling mill sliding plate brings great economic burden to the iron and steel enterprises.
Disclosure of Invention
The invention aims to overcome the defects that the existing failed rolling mill sliding plate cannot be reused and has high economic expenditure, and thus provides a remanufacturing method of the failed H-shaped steel rolling mill sliding plate.
In order to achieve the purpose, the invention provides a remanufacturing method of a failed H-shaped steel rolling mill sliding plate, which comprises the following steps:
step 1), correcting the appearance of the failed H-shaped steel rolling mill sliding plate in a machining mode, so that the appearance size of the corrected H-shaped steel rolling mill sliding plate meets the original design size;
step 2), performing surface coating repair on the sliding plate of the H-shaped steel rolling mill with large abrasion loss or surface cracking or meat falling by adopting a surfacing technology;
and 3) performing heat treatment repair on the failed H-shaped steel rolling mill sliding plate.
In the above technical solution, the step 2) further includes: and machining the surface-coated and repaired rolling mill steel plate according to the designed original data.
In the above technical scheme, in the step 2), the material adopted for surface coating repair comprises a Ni-Fe-based material or a Ni-Cr-based material.
In the above technical solution, in the step 3), the heat treatment repair includes modulation treatment, laser surface processing, and surface coating strengthening.
In the technical scheme, the laser surface processing is realized by adopting a laser surface engineering technology; the laser surface engineering technology comprises laser quenching and laser cladding; wherein,
the laser quenching realizes ultra-fast heating and cooling in the metal surface scanning process by using a high-energy laser beam to finish the quenching of the metal surface;
in the laser cladding process, high-energy laser beams are utilized to melt and metallurgically bond the alloy material on the surface of the metal material in the metal surface scanning process, so that the repair of the metal surface is completed.
In the above technical solution, the process parameters of the laser quenching are shown in the following table:
| serial number | Item | Laser hardening |
| 1 | Installed capacity for quenching, kVA | 100 |
| 2 | Actual power consumed, kW | 60 |
| 3 | Skateboard material | 42CrMo |
| 4 | Slide plate machining allowance mm before quenching | -0.20～0.10 |
| 5 | Quenching time of hours | 4.5 |
| 6 | Energy consumption, kW.h | 1008 |
| 7 | Superhard rolling time, hour | Is free of |
| 8 | Production process | Machining and laser hardening |
| 9 | Hardness of quenching | HRC45～50 |
| 10 | Depth of hardening layer, mm | 0.8～1.2 |
。
The invention has the advantages that:
the method can effectively repair the failed H-shaped steel rolling mill sliding plate, and compared with the original rolling mill sliding plate, the repaired rolling mill sliding plate has small performance difference, thereby effectively saving the enterprise expenditure.
Drawings
FIG. 1 is a flow chart of the method of the present invention.
Detailed Description
The invention will now be further described with reference to the accompanying drawings.
Referring to fig. 1, for a failed H-type rolling mill skid, the present invention repairs it using the following method,
step 1), correcting the appearance.
The failed H-shaped steel rolling mill sliding plate usually has a deformation phenomenon, so that the deformed rolling mill sliding plate is subjected to shape correction in a machining mode to ensure that the shape dimension of the rolling mill sliding plate basically conforms to the original design dimension.
And 2) coating and repairing the surface.
The surface of the rolling mill sliding plate with large abrasion loss or surface cracking or meat dropping is coated and repaired by adopting a surfacing technology, and the adopted material comprises a Ni-Fe base material or a Ni-Cr base material during surfacing.
As a preferred implementation, the rolling mill skid plate subjected to surface coating repair is further required to be machined according to the original data of design to ensure the roughness of the surface.
And 3) performing heat treatment repair.
The rolling mill sliding plate subjected to the previous repairing operation is subjected to heat treatment repairing, so that the impact resistance and corrosion resistance of the rolling mill sliding plate are improved, and the service performance of the rolling mill sliding plate is ensured. The heat treatment repair adopts any one or more modes including modulation treatment or laser surface processing or surface coating strengthening technology.
In the present embodiment, laser surface processing is implemented by using a laser surface engineering technique. The laser surface engineering technology comprises laser quenching and laser cladding. The laser quenching is to realize ultra-fast heating and cooling in the metal surface scanning process by utilizing a high-energy laser beam to finish the quenching of the metal surface. In laser cladding, a high-energy laser beam is used to melt and metallurgically bond an alloy material on the surface of a metal material in the scanning process of the metal surface to complete the repair of the metal surface, which is also called laser surfacing.
The characteristics of the laser surface engineering technology are given in the following table 1, and the description thereof shows that the laser surface engineering technology not only has good treatment effect, but also has wide selection range of die materials, small processing amount after treatment and wide adaptability.
TABLE 1
As a preferred implementation manner, in this embodiment, the main technical parameters during laser quenching are shown in table 2 below:
TABLE 2
| Serial number | Item | Laser hardening |
| 1 | Installed capacity for quenching, kVA | 100 |
| 2 | Actual power consumed, kW | 60 |
| 3 | Skateboard material | 42CrMo |
| 4 | Slide plate machining allowance mm before quenching | -0.20～0.10 |
| 5 | Quenching time of hours | 4.5 |
| 6 | Energy consumption, kW.h | 1008 |
| 7 | Superhard rolling time, hour | Is free of |
| 8 | Production process | Machining and laser hardening |
| 9 | Hardness of quenching | HRC45～50 |
| 10 | Depth of hardening layer, mm | 0.8～1.2 |
The method can effectively repair the failed H-shaped steel rolling mill sliding plate, and compared with the original rolling mill sliding plate, the repaired rolling mill sliding plate has small performance difference, thereby effectively saving the enterprise expenditure.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and are not limited. Although the present invention has been described in detail with reference to the embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (6)
1. A remanufacturing method of a failed H-shaped steel rolling mill sliding plate comprises the following steps:
step 1), correcting the appearance of the failed H-shaped steel rolling mill sliding plate in a machining mode, so that the appearance size of the corrected H-shaped steel rolling mill sliding plate meets the original design size;
step 2), performing surface coating repair on the sliding plate of the H-shaped steel rolling mill with large abrasion loss or surface cracking or meat falling by adopting a surfacing technology;
and 3) performing heat treatment repair on the failed H-shaped steel rolling mill sliding plate.
2. The method for remanufacturing a skid plate of a failed H-beam mill according to claim 1, wherein the step 2) further comprises: and machining the rolling mill sliding plate subjected to surface coating repair according to the designed original data.
3. The method for remanufacturing a slide plate for a failed H-type steel mill according to claim 1, wherein in the step 2), the material used for surface coating repair comprises a Ni-Fe-based or Ni-Cr-based material.
4. The method for remanufacturing a sliding plate of a failed H-type steel mill according to claim 1 or 2, wherein in the step 3), the heat treatment repairing comprises modulation treatment, laser surface processing and surface coating strengthening.
5. The method for remanufacturing a slide plate of a failed H-beam rolling mill according to claim 4, wherein the laser surface machining is achieved by a laser surface engineering technique; the laser surface engineering technology comprises laser quenching and laser cladding; wherein,
the laser quenching realizes ultra-fast heating and cooling in the metal surface scanning process by using a high-energy laser beam to finish the quenching of the metal surface;
in the laser cladding process, high-energy laser beams are utilized to melt and metallurgically bond the alloy material on the surface of the metal material in the metal surface scanning process, so that the repair of the metal surface is completed.
6. The method for remanufacturing a slide plate of a failed H-beam mill according to claim 5, wherein the process parameters of the laser quenching are as shown in the following table:
。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310288559.4A CN103350315B (en) | 2013-07-05 | 2013-07-05 | A kind of inefficacy H profile steel rolling mill sliding plate reproducing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310288559.4A CN103350315B (en) | 2013-07-05 | 2013-07-05 | A kind of inefficacy H profile steel rolling mill sliding plate reproducing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103350315A true CN103350315A (en) | 2013-10-16 |
| CN103350315B CN103350315B (en) | 2016-01-20 |
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| CN201310288559.4A Expired - Fee Related CN103350315B (en) | 2013-07-05 | 2013-07-05 | A kind of inefficacy H profile steel rolling mill sliding plate reproducing method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104439880A (en) * | 2014-11-07 | 2015-03-25 | 武汉钢铁(集团)公司 | Method for repairing pyramidal shaft of cold rolling coiler mandrel |
| CN113604751A (en) * | 2021-08-04 | 2021-11-05 | 温州东南工业机械实业有限公司 | Sliding plate for rolling mill and surface cladding surfacing process thereof |
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| CN1334164A (en) * | 2000-07-17 | 2002-02-06 | 重庆钢铁(集团)有限责任公司 | Surface combination technology of straightening roll |
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-
2013
- 2013-07-05 CN CN201310288559.4A patent/CN103350315B/en not_active Expired - Fee Related
Patent Citations (7)
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| GB896693A (en) * | 1958-10-29 | 1962-05-16 | Giovanni Galvani | An improved method of repairing and refitting ingot moulds, casting plates and the like, more particularly those of large dimensions |
| CN1334164A (en) * | 2000-07-17 | 2002-02-06 | 重庆钢铁(集团)有限责任公司 | Surface combination technology of straightening roll |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104439880A (en) * | 2014-11-07 | 2015-03-25 | 武汉钢铁(集团)公司 | Method for repairing pyramidal shaft of cold rolling coiler mandrel |
| CN113604751A (en) * | 2021-08-04 | 2021-11-05 | 温州东南工业机械实业有限公司 | Sliding plate for rolling mill and surface cladding surfacing process thereof |
| CN113604751B (en) * | 2021-08-04 | 2022-02-08 | 温州东南工业机械实业有限公司 | Sliding plate for rolling mill and surface cladding surfacing process thereof |
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| CN103350315B (en) | 2016-01-20 |
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