CN109837541A - A kind of heavy rail straightening help roll laser cladding method - Google Patents
A kind of heavy rail straightening help roll laser cladding method Download PDFInfo
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- CN109837541A CN109837541A CN201910303909.7A CN201910303909A CN109837541A CN 109837541 A CN109837541 A CN 109837541A CN 201910303909 A CN201910303909 A CN 201910303909A CN 109837541 A CN109837541 A CN 109837541A
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- melting coating
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Abstract
A kind of heavy rail straightening help roll laser cladding method first pre-processes heavy rail straightening help roll to be processed, is preheated again later, then carry out laminar smelting and coating.When laminar smelting and coating, the cladding of laser melting coating transition zone is first carried out, then carries out the cladding of laser melting coating working lining.The cladding of working lining I, working lining II, working lining III, working lining IV are successively carried out in laser melting coating working lining.The present invention solves the technical issues of final product quality existing in the prior art is looked by the restriction of the above method and specific machined parameters, provides that a kind of Quality Cost is good, the service life is high, and rail high in machining efficiency aligns help roll laser cladding method.
Description
Technical field
The invention belongs to technique manufacture field more particularly to a kind of heavy rail straightening help roll laser cladding method.
Background technique
In the prior art, intensive treatment is generally carried out to heavy rail straightening help roll using plating mode, this technique uses
In the process, the waste material environmental pollution of generation is larger, and the electroplated layer of finished product, than relatively thin, hardness and wear-resisting property are bad,
Final product quality is poor.
Summary of the invention
The invention provides a kind of heavy rail straightening help roll laser cladding method, cladding face is divided into multilayer, successively
Laser melting coating is carried out, the technological parameter of every layer of cooperation setting carries out cladding, and it is poor to solve final product quality existing in the prior art,
Service life is short, and the technical problem that problem of Cracking is serious.
To achieve the goals above, the technical solution that the invention uses are as follows:
A kind of heavy rail straightening help roll laser cladding method, the steps include:
1) it pre-processes: removal help roll surface grease, corrosion pit and crackle；
2) it preheats help roll: by help roll with the heating speed of 20 DEG C/s, being heated to 100-200 DEG C, and keep 20min,
Make that roller surface is assisted to be maintained at reservation temperature range；
3) laser melting coating:
3a) laser melting coating transition zone；
3b) laser melting coating working lining: working lining successively includes working lining I, working lining II, working lining III, working lining IV；
4) help roll after heat preservation slow cooling processing laser melting coating.
The step 3a) in specific process parameter are as follows: laser power 2200W, laser melting coating surface sweeping rate be 15mm/
S, for laser melting coating with a thickness of 1mm, powder feeding width is 4mm, powder sending quantity 15g/min.
The step 3b) in, laser melting coating completes the laser melting coating of progress working lining II after working lining I, laser melting coating
The laser melting coating of working lining III is carried out after completion working lining II again, laser melting coating carries out working lining IV after completing working lining III again
Laser melting coating.
The laser melting coating specific process parameter of the working lining I are as follows: laser power 1800w, laser melting coating surface sweeping speed
Rate is 15mm/s, and for laser melting coating with a thickness of 1mm, powder feeding width is 5mm, powder sending quantity 13g/min.
The laser melting coating specific process parameter of the working lining II are as follows: laser power 1900w, laser melting coating surface sweeping speed
Rate is 18mm/s, and for laser melting coating with a thickness of 2mm, powder feeding width is 5mm, powder sending quantity 19g/min.
The laser melting coating specific process parameter of the working lining III are as follows: laser power 2300w, laser melting coating surface sweeping
Rate is 17mm/s, and for laser melting coating with a thickness of 1mm, powder feeding width is 5mm, powder sending quantity 14g/min.
The laser melting coating specific process parameter of the working lining IV are as follows: laser power 2800w, laser melting coating surface sweeping speed
Rate is 12mm/s, and for laser melting coating with a thickness of 1mm, powder feeding width is 5mm, powder sending quantity 18g/min.
The invention has the beneficial effect that
The present invention provides a kind of heavy rail straightening help roll laser cladding methods, first to heavy rail straightening help roll to be processed
Memory pretreatment, is preheated, then carry out laminar smelting and coating again later.When laminar smelting and coating, the molten of laser melting coating transition zone is first carried out
It covers, then carries out the cladding of laser melting coating working lining.Working lining I, working lining II, work are successively carried out in laser melting coating working lining
The cladding of layer III, working lining IV.By the above method, and the restriction of specific machined parameters, the present invention provides one kind to be processed into
Quality is good, the service life is long, and rail high in machining efficiency aligns help roll laser cladding method.
Specific embodiment
1) it pre-processes: removal help roll surface grease, corrosion pit and crackle；
2) it preheats help roll: by help roll with the heating speed of 20 DEG C/s, being heated to 100-200 DEG C, and keep 20min,
Make that roller surface is assisted to be maintained at reservation temperature range；
3) laser melting coating:
3a) laser melting coating transition zone；
3a) laser melting coating transition zone: specific process parameter are as follows: laser power 2200W, laser melting coating surface sweeping rate are
15mm/s, for laser melting coating with a thickness of 1mm, powder feeding width is 4mm, powder sending quantity 15g/min.
Laser power is 2200W, this magnitude of power can obtain comparatively ideal cladding layer, if power value is excessive, just
It will cause cladding powder burn-off phenomenon, influence cladding effect；If the power chosen is too low, it will cause cladding powder and matrix cannot be effective
Fusing, ultimately cause cladding layer generation and be mingled with and macrosegregation, and crackle is obvious.The scanning speed of laser melting coating is set as
15mm/s is optimum parameter value, and scanning speed is excessive, influences whether cladding layer hardness, will lead to cladding and is not enough, to tissue
Interior microscopic pattern has an important influence on, and stomata, to be mingled with phenomenon gradually obvious, is easy to produce crackle.If scanning speed is too small, lead
The powder fallen into molten bath and matrix is caused to generate burning, the time that liquid phase is solidified as solid phase is elongated, influences coagulation result.Meanwhile
Too small scanning speed also influences whether cladding efficiency.Cladding thick layer 1mm is also optimal processing parameter, and thickness depends primarily on
Final cladding effect, while thickness also influences whether the associativity between each cladding layer.It is excessive, it will lead to cladding layer mistake
Afterwards, the too small energy snubber and bond effect that can not effectively play between connection cladding layer.Powder feeding width depends on laser function
Rate, the powder feeding width under selected power using 4mm is optimal, as long as the realization of this powder feeding width is straight depending on hot spot
Diameter.Powder sending quantity 15g/min and optimal parameter, powder sending quantity size determine the impact effect between laser beam and powder beam, powder feeding
It measures excessive, causes effectively solidify in molten bath, generation is mingled with；It is too small, cause alloy infiltration to be not enough, influences cenotype
It generates, the final quality for influencing cladding road.
3b) laser melting coating working lining: working lining successively includes working lining I, working lining II, working lining II, and laser melting coating is complete
At the laser melting coating for carrying out working lining II after working lining I, the laser of working lining III is carried out after laser melting coating completion working lining II again
Cladding.
The laser melting coating specific process parameter of the working lining I are as follows: the laser melting coating concrete technology of the working lining I
Parameter are as follows: laser power 1800w, laser melting coating surface sweeping rate are 15mm/s, and laser melting coating is with a thickness of 1mm, powder feeding width
5mm, powder sending quantity 13g/min.
Laser power is 1800W, this magnitude of power can obtain comparatively ideal cladding layer, if power value is excessive, just
It will cause cladding powder burn-off phenomenon, influence cladding effect；If the power chosen is too low, it will cause cladding powder and matrix cannot be effective
Fusing, ultimately cause cladding layer generation and be mingled with and macrosegregation, and crackle is obvious.The scanning speed of laser melting coating is set as
15mm/s is optimum parameter value, and scanning speed is excessive, influences whether cladding layer hardness, will lead to cladding and is not enough, to tissue
Interior microscopic pattern has an important influence on, and stomata, to be mingled with phenomenon gradually obvious, is easy to produce crackle.If scanning speed is too small, lead
The powder fallen into molten bath and matrix is caused to generate burning, the time that liquid phase is solidified as solid phase is elongated, influences coagulation result.Meanwhile
Too small scanning speed also influences whether cladding efficiency.Cladding thick layer 1mm is also optimal processing parameter, and thickness depends primarily on
Final cladding effect, while thickness also influences whether the associativity between each cladding layer.It is excessive, it will lead to cladding layer mistake
Afterwards, the too small energy snubber and bond effect that can not effectively play between connection cladding layer.Powder feeding width depends on laser function
Rate, the powder feeding width under selected power using 5mm is optimal, as long as the realization of this powder feeding width is straight depending on hot spot
Diameter.Powder sending quantity 13g/min and optimal parameter, powder sending quantity size determine the impact effect between laser beam and powder beam, powder feeding
It measures excessive, causes effectively solidify in molten bath, generation is mingled with；It is too small, cause alloy infiltration to be not enough, influences cenotype
It generates, the final quality for influencing cladding road.
The laser melting coating specific process parameter of the working lining II are as follows: the specific work of laser melting coating of the working lining II
Skill parameter are as follows: laser power 1900w, laser melting coating surface sweeping rate are 18mm/s, and laser melting coating is with a thickness of 2mm, powder feeding width
For 5mm, powder sending quantity 19g/min.
Laser power is 1900W, this magnitude of power can obtain comparatively ideal cladding layer, if power value is excessive, just
It will cause cladding powder burn-off phenomenon, influence cladding effect；If the power chosen is too low, it will cause cladding powder and matrix cannot be effective
Fusing, ultimately cause cladding layer generation and be mingled with and macrosegregation, and crackle is obvious.The scanning speed of laser melting coating is set as
18mm/s is optimum parameter value, and scanning speed is excessive, influences whether cladding layer hardness, will lead to cladding and is not enough, to tissue
Interior microscopic pattern has an important influence on, and stomata, to be mingled with phenomenon gradually obvious, is easy to produce crackle.If scanning speed is too small, lead
The powder fallen into molten bath and matrix is caused to generate burning, the time that liquid phase is solidified as solid phase is elongated, influences coagulation result.Meanwhile
Too small scanning speed also influences whether cladding efficiency.Cladding thick layer 2mm is also optimal processing parameter, and thickness depends primarily on
Final cladding effect, while thickness also influences whether the associativity between each cladding layer.It is excessive, it will lead to cladding layer mistake
Afterwards, the too small energy snubber and bond effect that can not effectively play between connection cladding layer.Powder feeding width depends on laser function
Rate, the powder feeding width under selected power using 5mm is optimal, as long as the realization of this powder feeding width is straight depending on hot spot
Diameter.Powder sending quantity 19g/min and optimal parameter, powder sending quantity size determine the impact effect between laser beam and powder beam, powder feeding
It measures excessive, causes effectively solidify in molten bath, generation is mingled with；It is too small, cause alloy infiltration to be not enough, influences cenotype
It generates, the final quality for influencing cladding road.
The laser melting coating specific process parameter of the working lining III are as follows: laser power 2300w, laser melting coating surface sweeping
Rate is 17mm/s, and for laser melting coating with a thickness of 1mm, powder feeding width is 5mm, powder sending quantity 14g/min.
Laser power is 2300W, this magnitude of power can obtain comparatively ideal cladding layer, if power value is excessive, just
It will cause cladding powder burn-off phenomenon, influence cladding effect；If the power chosen is too low, it will cause cladding powder and matrix cannot be effective
Fusing, ultimately cause cladding layer generation and be mingled with and macrosegregation, and crackle is obvious.The scanning speed of laser melting coating is set as
17mm/s is optimum parameter value, and scanning speed is excessive, influences whether cladding layer hardness, will lead to cladding and is not enough, to tissue
Interior microscopic pattern has an important influence on, and stomata, to be mingled with phenomenon gradually obvious, is easy to produce crackle.If scanning speed is too small, lead
The powder fallen into molten bath and matrix is caused to generate burning, the time that liquid phase is solidified as solid phase is elongated, influences coagulation result.Meanwhile
Too small scanning speed also influences whether cladding efficiency.Cladding thick layer 1mm is also optimal processing parameter, and thickness depends primarily on
Final cladding effect, while thickness also influences whether the associativity between each cladding layer.It is excessive, it will lead to cladding layer mistake
Afterwards, the too small energy snubber and bond effect that can not effectively play between connection cladding layer.Powder feeding width depends on laser function
Rate, the powder feeding width under selected power using 5mm is optimal, as long as the realization of this powder feeding width is straight depending on hot spot
Diameter.Powder sending quantity 14g/min and optimal parameter, powder sending quantity size determine the impact effect between laser beam and powder beam, powder feeding
It measures excessive, causes effectively solidify in molten bath, generation is mingled with；It is too small, cause alloy infiltration to be not enough, influences cenotype
It generates, the final quality for influencing cladding road.
The laser melting coating specific process parameter of the working lining IV are as follows: laser power 2800w, laser melting coating surface sweeping speed
Rate is 12mm/s, and for laser melting coating with a thickness of 1mm, powder feeding width is 5mm, powder sending quantity 18g/min.
Laser power is 2800W, this magnitude of power can obtain comparatively ideal cladding layer, if power value is excessive, just
It will cause cladding powder burn-off phenomenon, influence cladding effect；If the power chosen is too low, it will cause cladding powder and matrix cannot be effective
Fusing, ultimately cause cladding layer generation and be mingled with and macrosegregation, and crackle is obvious.The scanning speed of laser melting coating is set as
12mm/s is optimum parameter value, and scanning speed is excessive, influences whether cladding layer hardness, will lead to cladding and is not enough, to tissue
Interior microscopic pattern has an important influence on, and stomata, to be mingled with phenomenon gradually obvious, is easy to produce crackle.If scanning speed is too small, lead
The powder fallen into molten bath and matrix is caused to generate burning, the time that liquid phase is solidified as solid phase is elongated, influences coagulation result.Meanwhile
Too small scanning speed also influences whether cladding efficiency.Cladding thick layer 1mm is also optimal processing parameter, and thickness depends primarily on
Final cladding effect, while thickness also influences whether the associativity between each cladding layer.It is excessive, it will lead to cladding layer mistake
Afterwards, the too small energy snubber and bond effect that can not effectively play between connection cladding layer.Powder feeding width depends on laser function
Rate, the powder feeding width under selected power using 5mm is optimal, as long as the realization of this powder feeding width is straight depending on hot spot
Diameter.Powder sending quantity 18g/min and optimal parameter, powder sending quantity size determine the impact effect between laser beam and powder beam, powder feeding
It measures excessive, causes effectively solidify in molten bath, generation is mingled with；It is too small, cause alloy infiltration to be not enough, influences cenotype
It generates, the final quality for influencing cladding road.
4) help roll after heat preservation slow cooling processing laser melting coating.
Claims (7)
1. a kind of heavy rail straightening help roll laser cladding method, it is characterised in that:
1) it pre-processes: removal help roll surface grease, corrosion pit and crackle；
2) it preheats help roll: by help roll with the heating speed of 20 DEG C/s, being heated to 100-200 DEG C, and keep 20min, make auxiliary
Roller surface is helped to be maintained at reservation temperature range；
3) laser melting coating:
3a) laser melting coating transition zone；
3b) laser melting coating working lining: working lining successively includes working lining I, working lining II, working lining III, working lining IV；
4) help roll after heat preservation slow cooling processing laser melting coating.
2. a kind of heavy rail straightening help roll laser cladding method according to claim 1, it is characterised in that: the step
Specific process parameter in 3a) are as follows: laser power 2200W, laser melting coating surface sweeping rate be 15mm/s, laser melting coating with a thickness of
1mm, powder feeding width are 4mm, powder sending quantity 15g/min.
3. a kind of heavy rail straightening help roll laser cladding method according to claim 1, it is characterised in that: the step
In 3b), laser melting coating complete working lining I after carry out working lining II laser melting coating, laser melting coating complete working lining II after again into
The laser melting coating of row working lining III, laser melting coating carry out the laser melting coating of working lining IV after completing working lining III again.
4. a kind of heavy rail straightening help roll laser cladding method according to claim 3, it is characterised in that: the work
The laser melting coating specific process parameter of layer I are as follows: laser power 1800w, laser melting coating surface sweeping rate are 15mm/s, laser melting coating
With a thickness of 1mm, powder feeding width is 5mm, powder sending quantity 13g/min.
5. a kind of heavy rail straightening help roll laser cladding method according to claim 3, it is characterised in that: the work
The laser melting coating specific process parameter of layer II are as follows: laser power 1900w, laser melting coating surface sweeping rate are 18mm/s, and laser is molten
It covers with a thickness of 2mm, powder feeding width is 5mm, powder sending quantity 19g/min.
6. a kind of heavy rail straightening help roll laser cladding method according to claim 3, it is characterised in that: the work
The laser melting coating specific process parameter of layer III are as follows: laser power 2300w, laser melting coating surface sweeping rate are 17mm/s, and laser is molten
It covers with a thickness of 1mm, powder feeding width is 5mm, powder sending quantity 14g/min.
7. a kind of heavy rail straightening help roll laser cladding method according to claim 3, it is characterised in that: the work
The laser melting coating specific process parameter of layer IV are as follows: laser power 2800w, laser melting coating surface sweeping rate are 12mm/s, and laser is molten
It covers with a thickness of 1mm, powder feeding width is 5mm, powder sending quantity 18g/min.
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| CN201910303909.7A CN109837541A (en) | 2019-04-16 | 2019-04-16 | A kind of heavy rail straightening help roll laser cladding method |
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| CN201910303909.7A CN109837541A (en) | 2019-04-16 | 2019-04-16 | A kind of heavy rail straightening help roll laser cladding method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102392243A (en) * | 2011-12-22 | 2012-03-28 | 广州有色金属研究院 | Laser surface cladding method of straightening roller |
| CN104647474A (en) * | 2015-02-11 | 2015-05-27 | 福建工程学院 | Die roller for rotary die-cutting equipment and forming method for blade of die roller |
| CN105420724A (en) * | 2015-12-17 | 2016-03-23 | 辽宁工业大学 | Iron-base alloy gradient cladding layer and preparation method thereof |
| CN109402631A (en) * | 2018-12-27 | 2019-03-01 | 安徽工业大学 | High rigidity grad enhancement cold roll and its Laser Melting Cover Layer preparation method |
-
2019
- 2019-04-16 CN CN201910303909.7A patent/CN109837541A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102392243A (en) * | 2011-12-22 | 2012-03-28 | 广州有色金属研究院 | Laser surface cladding method of straightening roller |
| CN104647474A (en) * | 2015-02-11 | 2015-05-27 | 福建工程学院 | Die roller for rotary die-cutting equipment and forming method for blade of die roller |
| CN105420724A (en) * | 2015-12-17 | 2016-03-23 | 辽宁工业大学 | Iron-base alloy gradient cladding layer and preparation method thereof |
| CN109402631A (en) * | 2018-12-27 | 2019-03-01 | 安徽工业大学 | High rigidity grad enhancement cold roll and its Laser Melting Cover Layer preparation method |
Non-Patent Citations (3)
| Title |
|---|
| 任宗文等: ""高速重轨矫直辊使用中破损原因分析及预防"", 《武钢技术》 * |
| 关振中: "《激光加工工艺手册》", 30 September 2005, 中国计量出版社 * |
| 张昌春等: ""激光熔覆高厚度涂层技术研究现状及发展趋势"", 《激光技术》 * |
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Application publication date: 20190604 |