CN102732878A - Laser strengthening process of piercing point - Google Patents
Laser strengthening process of piercing point Download PDFInfo
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- CN102732878A CN102732878A CN2012102489649A CN201210248964A CN102732878A CN 102732878 A CN102732878 A CN 102732878A CN 2012102489649 A CN2012102489649 A CN 2012102489649A CN 201210248964 A CN201210248964 A CN 201210248964A CN 102732878 A CN102732878 A CN 102732878A
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Abstract
The invention relates to a laser strengthening process of a piercing point. The laser strengthening process comprises the following steps of: smelting a transition alloy layer on the surface of a substrate of the piercing point; smelting a high-strength alloy layer on the transition alloy layer by laser, wherein alloy powder used by the transition alloy layer is an nickel-based alloy; and the alloy powder used by the high-strength alloy layer is a cobalt-based alloy. In the process, the hardness of the transition alloy layer is lower than that of the high-strength alloy layer, has the transition effect on the high-hardness and high-abrasion-resistance high-strength alloy layer, and can better remit an overlaying stress, so that a residual overlaying stress does not cause great influences on tissues of a laser smelting layer even if the point is not pre-heated and not annealed, so that the phenomenon that the performance of the smelting layer is influenced by annealing can be effectively avoided and the surface hardness and the abrasion resistance of the piercing point are greatly improved; and meanwhile, the pre-heating and annealing processes are saved and the production efficiency is improved.
Description
Technical field
The present invention relates to a kind of laser cladding method, the laser cladding method on especially a kind of perforating head surface.
Background technology
Along with the increase of China's weldless steel tube export volume, the consumption of producing the employed spare part of weldless steel tube also increases year by year.Perforating head is the key tool of producing weldless steel tube, and the quality of the quality of perforating head and the length in work-ing life all have direct influence to output, quality and the production cost of weldless steel tube.Perforating head when work temperature very high, and bear very big compound stress, can occur in the use being out of shape, subside, inefficacies such as steel bonding, cracking.China has the perforating head above 1,000,000 to go out of use because of failure cause every year, and this numeral just increases with the speed more than 15% year by year.If can these inefficacies or new perforating head be utilized laser melting and coating technique its surface is handled, can save the more than one hundred million units of materials cost every year.
The temperature that the perforating head nose bears at work, friction ratio, impact are the highest, are positions the most easy to wear.The use laser melting and coating technique is high temperature resistant uniformly, wear-resistant at outside surface built-up welding one layer thickness of perforating head nose, the alloy material of high firmness, can be so that improve greatly the work-ing life of perforating head.At present, both at home and abroad to the laser melting and coating technique that perforating head adopted, generally be the nickel base alloy layer or the cobalt-based alloy layer of outside surface built-up welding one deck hard high-wearing feature in the top.For example: (application number is Chinese patent document CN101596551B: 200910088534.3) disclose a kind of pairing gold plating seamless steel tube top; Nose, the Ni-based or Co-based alloy coating of operate portions laser wide-band cladding in the top; At aligning portion, parallel portion laser wide-band cladding iron alloy coating, obtain a kind of pairing gold plating seamless steel tube top.This pairing gold plating seamless steel tube top is the different alloy layer of different sites cladding in the top.
Perforating head inevitably can produce built-up welding stress in the process of laser melting coating, these stress must in time be eliminated, otherwise the tissue of laser cladding layer is caused fatal destruction.Perforating head laser melting and coating process of the prior art all must carry out preheating to the top, and after built-up welding finishes, anneals, and to eliminate stress, not only operation is loaded down with trivial details, and production efficiency is slow, also can make the hardness of cladding layer reduce, and exists certain problem.
Summary of the invention
The technical problem that the present invention will solve provides a kind ofly carries out laser melting coating to the perforating head surface; Need not preheating before the laser melting coating; Need not annealing after the laser melting coating, can make the laser reinforcing process of the perforating head that perforating head surface hardness and wear resistance significantly improve.
In order to solve the problems of the technologies described above, the invention provides a kind of laser reinforcing process of perforating head, earlier laser melting coating transition alloy layer, laser melting coating high-strength alloy layer on transition alloy layer again on the perforating head matrix surface; The powdered alloy that said transition alloy layer adopts is a nickel-base alloy, and the powdered alloy that said high-strength alloy layer adopts is a cobalt base alloy.
The built-up welding stress that is produced in order to make transition alloy layer better to alleviate in the laser cladding process; A kind of optimized technical scheme is: the component of above-mentioned nickel-base alloy and weight percent content are C≤0.03%; Cr:15% to 19%; B:0.8% to 1.2%, Si:2% to 2.5%, all the other are Ni.The content of C has been controlled in the powdered alloy strictness, makes it be not more than 0.03%, helps improving the wettability of cladding layer, prevents in cladding process, to crack and pore; Simultaneously to make alloy be main matrix solidifying that the back forms with the austenite through adding an amount of B, Si in the powdered alloy; Proper C r element has carried out alloy strengthening to nickel-base alloy in addition.Though transition alloy layer at high temperature hardness still has good welding characteristic and mechanical property less than the high-strength alloy layer.
In order to make the high-strength alloy layer at high temperature have higher hardness and wear resistance, a kind of optimized technical scheme is: the component of above-mentioned cobalt base alloy and weight percent content are C≤0.1%, Cr:19% to 21%; B:1.5% to 2.5%; Si:1.5% to 2.5%, W:5.5% to 6.5%, Ti:0.5% to 1.5%; Al:3% to 5%, all the other are Co.The content of C has been controlled in the powdered alloy strictness, makes it be not more than 0.1%, helps improving the wettability of cladding layer, prevents in cladding process, to crack and pore; Simultaneously to make alloy be main matrix solidifying that the back forms with the austenite through adding an amount of B, Si in the powdered alloy; Proper C r, W, Ti, Al element have carried out alloy strengthening to cobalt base alloy in addition, and play antioxygenation, make high-strength alloy layer hardness, wear resistance and welding characteristic at high temperature significantly promote.
In the laser cladding process heat in the top nose tip concentrate, a kind of optimized technical scheme is: adopt the sectional laser cladding method, from the nose tip of perforating head, carry out cladding from front to back piecemeal.Adopt this method to reach stress equilibrium, thereby even further guarantee not preheating, unannealed, built-up welding stress can not influence the performance of cladding layer yet so that the built-up welding stress that is produced in the laser cladding process disperses more.
In order better to eliminate the built-up welding stress that is produced in the laser cladding process, a kind of optimized technical scheme is: in laser cladding process, perforating head is carried out oscillating aging handle.Adopt this when stress produces just in time with the method for its dispersion even elimination, can effectively eliminate part built-up welding stress, thereby even further guarantee not preheating, unannealed, built-up welding stress can not influence the performance of cladding layer yet.
In order to guarantee the performance of cladding layer, better eliminate built-up welding stress, a kind of optimized technical scheme is: laser melting coating adopts and presets the mode of powder feeding, is that light source carries out the scanning of continuous helical feeding overlap joint to perforating head with the fast-transverse-flow CO; Laser power is 1500W to 1900W, and absolute altitude is 260mm to 275mm, and spot size is 10mm * 1.8mm, and sweep velocity is 110mm/min to 140mm/min, and amount of lap is 6.5mm, and powder sending quantity is 12g/min to 18g/min.Adopt the broad band laser bundle, help to improve the efficient of work; The mode of powder feeding is preset in employing; Powder sending quantity is controlled in strictness, and laser power, sweep velocity, amount of lap etc. are optimized, can be so that the deflection of the fixed head of perforation is little; The fusion rate of cladding layer and matrix is high, it is tight to combine, and the homogeneity of structure of cladding layer is good, thickness and even hardness.
In order to make perforating head obtain better strengthening effect, and guarantee to strengthen the quality of back perforating head, a kind of optimized technical scheme is: before laser melting coating, pre-treatment is carried out on the surface of perforating head; Behind laser melting coating, perforating head is detected.
Technique scheme of the present invention is compared prior art and had the following advantages: the laser reinforcing process of perforating head of the present invention is first laser melting coating one deck transition alloy layer on matrix earlier; Laser melting coating one deck high-strength alloy layer on transition alloy layer again; Transition alloy layer hardness ratio high-strength alloy layer is low; High-strength alloy layer to hard high-wearing feature plays a transition role, and can well alleviate built-up welding stress.Even making, this technology comes directly towards not preheating, unannealed; Residual built-up welding stress can not cause very big influence to the tissue of laser cladding layer yet; Can influence cladding layer capability thereby effectively avoided annealing; Make perforating head surface hardness and wear resistance significantly improve, hardness can reach 58 to 62HRC, saves preheating and annealing process simultaneously and has also improved production efficiency.This technology makes the perforating head longer service life; Also can be used for the perforating head inefficacy and repair, help economical with materials and resource, help reducing the seamless steel tube production cost; Help reducing of the pollution of discarded perforating head, have good economic benefit and social benefit environment.
Embodiment
The concrete steps of the laser reinforcing process of the perforating head of present embodiment are following:
A. pre-treatment is carried out on the surface of perforating head.
With removings such as the dust on the perforating head, greasy dirt, corrosions; Detect the size at each position; And clean.
B. laser melting coating is carried out on the surface of perforating head.
Adopt the sectional laser cladding method, from the nose tip of perforating head, (the top nose tip is a front end, and top external diameter maximum is the rear end) carried out laser melting coating to the surface of perforating head piecemeal from front to back.Elder generation cladding one deck transition alloy layer, cladding one deck high-strength alloy layer on transition alloy layer again on the perforating head matrix surface.In laser cladding process, ceaselessly knock perforating head, thereby make the perforating head vibration eliminate welding stress with copper rod.
Laser melting coating adopts and presets the mode of powder feeding, is that light source carries out the scanning of continuous helical feeding overlap joint to perforating head with the fast-transverse-flow CO.Laser power is 1700W, and absolute altitude (being that laser apparatus leaves the distance between the Substrate, absolute altitude=focal length+defocusing amount) is 270mm, and spot size is 10mm * 1.8mm, and sweep velocity is 120mm/min, and amount of lap is 6.5mm, and powder sending quantity is 15g/min.The powdered alloy that transition alloy layer adopted is a nickel-base alloy, and its component and weight percent content are C:0.03%, Cr:17%, and B:1%, Si:2.2%, all the other are Ni.The powdered alloy that the high-strength alloy layer is adopted is a cobalt base alloy, and its component and weight percent content are C:0.1%, Cr:20%, and B:2%, Si:2%, W:6%, Ti:1%, Al:4%, all the other are Co.
C. after laser melting coating finishes, perforating head is detected.
Detect surface hardness; Detect deflection; Requirement according to drawing is carried out mechanical workout to the perforating head surface; Carry out permeation flaw detection, detect the defective of influence top mechanical propertys such as whether pore, slag inclusion, slight crack are arranged; Carry out verification, whether quality inspection is qualified.
Obviously, the foregoing description only be for clearly the present invention is described and is done for example, and be not to be qualification to embodiment of the present invention.For the those of ordinary skill in affiliated field, on the basis of above-mentioned explanation, can also make other multi-form variation or change.Here need not also can't give exhaustive to all embodiments.And these belong to conspicuous variation or the change that spirit of the present invention extended out and still are among protection scope of the present invention.
Claims (7)
1. the laser reinforcing process of a perforating head is characterized in that: elder generation laser melting coating transition alloy layer, laser melting coating high-strength alloy layer on transition alloy layer again on the perforating head matrix surface; The powdered alloy that said transition alloy layer adopts is a nickel-base alloy, and the powdered alloy that said high-strength alloy layer adopts is a cobalt base alloy.
2. according to the laser reinforcing process of the described perforating head of claim 1, it is characterized in that: the component of said nickel-base alloy and weight percent content are C≤0.03%, Cr:15% to 19%, and B:0.8% to 1.2%, Si:2% to 2.5%, all the other are Ni.
3. according to the laser reinforcing process of the described perforating head of claim 2, it is characterized in that: the component of said cobalt base alloy and weight percent content are C≤0.1%, Cr:19% to 21%; B:1.5% to 2.5%; Si:1.5% to 2.5%, W:5.5% to 6.5%, Ti:0.5% to 1.5%; Al:3% to 5%, all the other are Co.
4. according to the laser reinforcing process of the described perforating head of one of claim 1 to 3, it is characterized in that: adopt the sectional laser cladding method,, carry out cladding from front to back piecemeal from the nose tip of perforating head.
5. according to the laser reinforcing process of the described perforating head of claim 4, it is characterized in that: in laser cladding process, perforating head is carried out oscillating aging handle.
6. according to the laser reinforcing process of the described perforating head of claim 5, it is characterized in that: laser melting coating adopts and presets the mode of powder feeding, is that light source carries out the scanning of continuous helical feeding overlap joint to perforating head with the fast-transverse-flow CO; Laser power is 1500W to 1900W, and absolute altitude is 260mm to 275mm, and spot size is 10mm * 1.8mm, and sweep velocity is 110mm/min to 140mm/min, and amount of lap is 6.5mm, and powder sending quantity is 12g/min to 18g/min.
7. according to the laser reinforcing process of the described perforating head of claim 6, it is characterized in that: before laser melting coating, pre-treatment is carried out on the surface of perforating head; Behind laser melting coating, perforating head is detected.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310537047.7A CN103572282B (en) | 2012-07-18 | 2012-07-18 | A kind of laser cladding method of perforating head surface |
| CN 201210248964 CN102732878B (en) | 2012-07-18 | 2012-07-18 | Laser strengthening process of piercing point |
| CN201310536959.2A CN103572280B (en) | 2012-07-18 | 2012-07-18 | Without the need to the laser reinforcing process of the perforating head of preheating before laser melting coating |
| CN201310537031.6A CN103572281B (en) | 2012-07-18 | 2012-07-18 | Without the need to the laser reinforcing process of the perforating head of annealing after laser melting coating |
| CN201310537063.6A CN103572283B (en) | 2012-07-18 | 2012-07-18 | The laser reinforcing process of perforating head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210248964 CN102732878B (en) | 2012-07-18 | 2012-07-18 | Laser strengthening process of piercing point |
Related Child Applications (4)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310537031.6A Division CN103572281B (en) | 2012-07-18 | 2012-07-18 | Without the need to the laser reinforcing process of the perforating head of annealing after laser melting coating |
| CN201310537063.6A Division CN103572283B (en) | 2012-07-18 | 2012-07-18 | The laser reinforcing process of perforating head |
| CN201310537047.7A Division CN103572282B (en) | 2012-07-18 | 2012-07-18 | A kind of laser cladding method of perforating head surface |
| CN201310536959.2A Division CN103572280B (en) | 2012-07-18 | 2012-07-18 | Without the need to the laser reinforcing process of the perforating head of preheating before laser melting coating |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102732878A true CN102732878A (en) | 2012-10-17 |
| CN102732878B CN102732878B (en) | 2013-12-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310537063.6A Active CN103572283B (en) | 2012-07-18 | 2012-07-18 | The laser reinforcing process of perforating head |
| CN201310537031.6A Active CN103572281B (en) | 2012-07-18 | 2012-07-18 | Without the need to the laser reinforcing process of the perforating head of annealing after laser melting coating |
| CN 201210248964 Expired - Fee Related CN102732878B (en) | 2012-07-18 | 2012-07-18 | Laser strengthening process of piercing point |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310537063.6A Active CN103572283B (en) | 2012-07-18 | 2012-07-18 | The laser reinforcing process of perforating head |
| CN201310537031.6A Active CN103572281B (en) | 2012-07-18 | 2012-07-18 | Without the need to the laser reinforcing process of the perforating head of annealing after laser melting coating |
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| CN103343339A (en) * | 2013-06-29 | 2013-10-09 | 苏州唐氏机械制造有限公司 | Laser restoration method for drawing die |
| CN103769794A (en) * | 2014-01-07 | 2014-05-07 | 烟台开发区蓝鲸金属修复有限公司 | Strengthening method of surface of piercing plug of seamless steel tube rolling mill |
| CN103898518A (en) * | 2014-03-24 | 2014-07-02 | 杭州大冶激光科技有限公司 | Repairing method of cracks on roll surface of back-up roll of rolling mill |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103343339A (en) * | 2013-06-29 | 2013-10-09 | 苏州唐氏机械制造有限公司 | Laser restoration method for drawing die |
| CN103769794A (en) * | 2014-01-07 | 2014-05-07 | 烟台开发区蓝鲸金属修复有限公司 | Strengthening method of surface of piercing plug of seamless steel tube rolling mill |
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| CN103898518A (en) * | 2014-03-24 | 2014-07-02 | 杭州大冶激光科技有限公司 | Repairing method of cracks on roll surface of back-up roll of rolling mill |
| CN104588931A (en) * | 2014-12-04 | 2015-05-06 | 常州大学 | Surfacing method for seamless tube piercing plug |
| CN105039972A (en) * | 2015-08-06 | 2015-11-11 | 宁波市鄞州文昌金属制品有限公司 | Abrasion-resistant steel pipe piercing plug |
| CN105018857A (en) * | 2015-08-06 | 2015-11-04 | 宁波市鄞州文昌金属制品有限公司 | High-temperature-resistant steel pipe piercing plug |
| CN109777977A (en) * | 2017-06-10 | 2019-05-21 | 黄国新 | A kind of punching machine rushes the manufacturing method of stick |
| CN108425034A (en) * | 2018-04-03 | 2018-08-21 | 烟台万隆真空冶金股份有限公司 | A kind of surface reinforcing method of beryllium copper Casting Roller set |
| CN109136802B (en) * | 2018-08-15 | 2020-05-29 | 沈阳工业大学 | Laser pretreatment corrosion-resistant strengthening process for aluminum alloy |
| CN110042387A (en) * | 2019-04-01 | 2019-07-23 | 西安理工大学 | A kind of 40Cr steel surface build-up wear-resistant layer and preparation method thereof |
| CN110205561A (en) * | 2019-06-20 | 2019-09-06 | 芜湖点金机电科技有限公司 | A kind of reinforcing piercing plug for seamless steel tubes and preparation method thereof |
| CN110699687A (en) * | 2019-11-18 | 2020-01-17 | 成都青石激光科技有限公司 | Method for strengthening high-nickel copper alloy glass mold |
| CN114481127A (en) * | 2022-02-10 | 2022-05-13 | 安徽中科春谷激光产业技术研究院有限公司 | Cladding process for laser cladding reinforced punch |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103572283A (en) | 2014-02-12 |
| CN103572281B (en) | 2015-09-30 |
| CN103572281A (en) | 2014-02-12 |
| CN102732878B (en) | 2013-12-18 |
| CN103572283B (en) | 2015-09-23 |
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Effective date of registration: 20200812 Address after: 528000 Shunde Foshan District, Lecong Town, iron and steel world E3 District West, No. two, No. 09, No. Patentee after: Foshan city Shunde District jahzeiah profile steel Co.,Ltd. Address before: 213000, Jiangsu, Zhenjiang province Danyang City, Lu Town, canal plexus Yang Village Patentee before: DANYANG HONGTU LASER TECHNOLOGY Co.,Ltd. |
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