CN102941391B - Sub laser instant fusion build-up welding process for damaged surface of large shaft of power station - Google Patents
Sub laser instant fusion build-up welding process for damaged surface of large shaft of power station Download PDFInfo
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- CN102941391B CN102941391B CN201210312363.XA CN201210312363A CN102941391B CN 102941391 B CN102941391 B CN 102941391B CN 201210312363 A CN201210312363 A CN 201210312363A CN 102941391 B CN102941391 B CN 102941391B
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Abstract
The invention provides a sub laser instant fusion build-up welding process for a damaged surface of a large shaft of a power station. The process comprises the following steps: step 1, taking a welding wire with the diameter of 0.6 millimeter to 1.6 millimeters or a welding flake with the thickness of 0.5 millimeter to 1.2 millimeters as welding flux; step 2, setting the maximum instant current of a sub laser instant fusion welding motor to be 800 A, the minimum arcing current to be 1.5 A, the continuous working current to be 100 A, the clearance working current to be 200 A, the energy regulating range to be 0 to 100 J, the impulse regulating range to be 1 to 12 Hz, and the duration regulating range to be 0.04 to 0.8 second; and step 3, bonding a welding gun of the sub laser instant fusion welding motor on the welding flux to weld a welding point with the diameter of about 5 millimeters and the thickness of 0.5 to 1.5 millimeters, and performing welding continuously until a welding face is formed by welding points. The process has the advantages that the repairing quality of build-up welding of large shafts of a power station can be improved, the processing property of repairing is improved, the period for build-up welding repairing of a power station is reduced, and the repairing cost is reduced.
Description
Technical field
The present invention relates to welding technology field, relate to the sub-laser of a kind of power station macrotype axes series damaged surfaces molten bead-welding technology instantaneously.
Background technology
During existing power station macrotype axes series damaged surfaces, in generator rotor shaft neck recovery technique, the normal method used is as turning method, hot spray process, brush plating method, paster differential of the arc welding method, laser cladding, electric spark deposition welding method etc.In the reparation of axle class, serve certain effect in above-mentioned technique, but also respectively have certain limitation, as turning method has the irreversibility of reparation; Thermal spraying and brush plating method, its bond strength is low; Paster differential of the arc welding, its benefit coating porosity is high.Wherein modal is electric spark deposition welding method, electric spark deposition welding method utilizes electric energy to make rotation electrode produce high-frequency spark electric discharge instantaneously at contact workpiece, thus the electrode material fusing as surfacing is even gasified, to make the electrode material of melting by diffusing into the surface coating of surface of the work formation alloying, thus realize surface size recovery.Existing electric spark deposition welding method also exists the problems such as repairing efficiency is longer, deposit thickness is restricted.
Summary of the invention
For the defect existed in the macrotype axes series damaged surfaces technology of existing power station and problem, the object of the embodiment of the present invention is to provide the sub-laser of one more rational power station macrotype axes series damaged surfaces molten bead-welding technology instantaneously.
In order to achieve the above object, the embodiment of the present invention provides following technical scheme: the sub-laser of a kind of power station macrotype axes series damaged surfaces molten bead-welding technology instantaneously, comprising:
Step 1, the welding wire adopting diameter to be 0.6 millimeter to 1.6 millimeters or thickness are that the weld tabs of 0.5 millimeter to 1.2 millimeters is as solder;
Step 2, the maximum instantaneous electric current setting sub-laser moment fusion welding motor are 800 peaces; Minimum striking current is 1.5 peaces; Continuous operation electric current is 100 peaces; Interval work electric current is 200 peaces and energy-conditioning range is 0 to 100 joule; Pulse regulation scope is 1 to 12 hertz; Duration adjustable range is 0.04-0.8 second (0 to 100);
Step 3, the welding gun of sub-laser moment fusion welding motor to be fitted on solder to weld out a diameter 5 millimeters, thickness is the solder joint of 0.5 to 1.5 millimeter; Carry out continuously welding until solder joint forms the face of weld.
Solder described in technique scheme is pure nickel welding wire or nickel-base alloy bare welding filler metal.
Preferred as technique scheme, described technique also comprises: clean solder with cleaning agent.
Preferred as technique scheme, described cleaning agent is acetone.
The technique of the embodiment of the present invention adopts sub-laser moment fusion welding technology, forms layer, to repair macro-axis with the spot welding of sub-laser moment fusion welding.The surface reconditioning of the embodiment of the present invention to power station macrotype axes series from now on has positive directive function, make the macro-axis surface bonding strength after reparation, case hardness substantially identical with macro-axis, guarantee safe handling and the service life of macro-axis, solve the difficult problem that power station macrotype axes series does not have join by fusion renovation technique.The embodiment of the present invention can be repaired macro-axis at the scene simultaneously, decreases the power station enterprise repair time, can save enterprise's rehabilitation cost, realize quality and efficiency doulbe-sides' victory.The embodiment of the present invention, by reducing the cycle of power station macrotype axes series Bead weld repair, improves renovation technique performance, improves the repairing quality of axle, reduces rehabilitation cost.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the schematic flow sheet of the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing of the present invention, be clearly and completely described technical scheme of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Existing sub-laser moment fusion welding technology is at the highest upper kilo-ampere left and right pulse energetic ion stream of moment (Millisecond) release, under argon shield by welding wire (0.6-1.6 millimeters) or weld tabs (0.5-1.2 millimeters) instant melting on matrix.Because sub-laser moment fusion welding technology is that momentary action and interval send pulse, matrix can keep not generating heat or few heating, and the effect that can play cold welding can obtain again the extraordinary layer of compactness.
The technique of the embodiment of the present invention comprises:
Step 1, the welding wire adopting diameter to be 0.6 millimeter to 1.6 millimeters or thickness are that the weld tabs of 0.5 millimeter to 1.2 millimeters is as solder;
Step 2, the maximum instantaneous electric current setting sub-laser moment fusion welding motor are 800 peaces; Minimum striking current is 1.5 peaces; Continuous operation electric current is 100 peaces; Interval work electric current is 200 peaces and energy-conditioning range is 0-100 joule; Pulse regulation scope: 1-12 hertz; Duration adjustable range is 0.04-0.8 second;
Step 3, the welding gun of sub-laser moment fusion welding motor to be fitted on solder to weld out a diameter 5 millimeters, thickness is 0.5 ~ 1.5 millimeter; Carry out continuously welding until solder joint forms the face of weld.
Wherein, described solder is pure nickel welding wire (Ni) or nickel-base alloy bare welding filler metal (such as: ERNiCr-3 or ERNiCrMo-3).
Prove that the technique of the embodiment of the present invention has good effect in the reparation of power station macrotype axes series damaged surfaces below by experiment:
One, engineer testing content:
1, sample and Material selec-tion:
Sample: the 30Cr2Ni4MoV macro-axis material selecting power station conventional is test specimen.
Packing material: pure nickel welding wire, ERNiCr-3, ERNiCrMo-3 are that packing material is divided into three groups to test.
Table 1: mother metal and wlding chemical analysis
2, sample preparation:
Sample welding position, in material be 30Cr2Ni4MoV test specimen axle transversal plane on process 20 mm wides, 2 millimeters deep and 10 mm wides respectively, the artificial wear defect of 1 millimeters deep.Test weld place and welding wire or weld tabs acetone are cleaned up, to prevent the impurity effect such as greasy dirt, moisture content surfacing quality.
3, operation sequence:
Use sub-laser moment fusion welding unit type for the YJG-II type sub-Laser Welding aluminium equipment of Yantai gold woods Surface Engineering equipment Co., Ltd.Tungsten electrode materials'use cerium tungsten electrode, diameter 2 millimeters.Before sample welding, different welding parameters selected by three groups of test specimens, and welding method, more comprehensively to understand various performance indications under different welding parameter and welding manner.Technological parameter is in table 2
Table 2: sub-laser moment fusion welding test technology parameter
Two, sample detects and test:
1, sub-laser moment casting-on Welding quality:
The repair welding of 30CrNi4MoV axle class, the selection of welding material is closely-related with obtaining excellent moment fusion welding quality.So deposited metal should select with mother metal chemical composition quite and the low welding material of impurity content or nickel-base material.The welding wire that the 3 kinds of brands such as nickel-based welding wire, ERNiCr-3 and ERNiCrMo-3 selecting welding procedure excellent are tested in this sub-laser wink fusion welding is tested.In welding wire, the constituent content such as S, P controls in lower level, and the increase of nickel content, can reduce the sensitiveness of the stress corrosion of weld crack and test specimen repair welding layer.
Repair welding height, in controlled range, is being beneficial to the machine-shaping to defect repair.Through overtesting, the welding and assembling height that sub-laser is molten instantaneously or control within the scope of 0.3-1.5 millimeter, according to sample depth of defect, built-up welding thickness can be 1 ~ 2.5 millimeter, and the repair welding for power station axle class wear-out defect has positive effect.
Metal lographic examination and microhardness assay (HV0.2)
Specimen cross section metallographic sample adopts Shimadzu HMV-2T type show hardometer and carry out micro-hardness testing near two batches of bead weld specimen weld seams respectively, load is 200g, test zone comprises overlay cladding, heat affected area and mother metal, and it is as shown in table 3 that inspection institute obtains microhardness result.
Table 3: microhardness result
In the metallograph of above sample, 2-1,3-3 test specimen has weld defect, do not find crackle, and melt run is neat in other position weld seam.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should described be as the criterion with the protection domain of claim.
Claims (3)
1. the sub-laser of a power station macrotype axes series damaged surfaces molten bead-welding technology instantaneously, is characterized in that, comprising:
Step 1, adopt diameter to be the welding wire of 0.6 millimeter to 1.6 millimeters or thickness to be the weld tabs of 0.5 millimeter to 1.2 millimeters as solder, described solder is pure nickel welding wire or nickel-base alloy bare welding filler metal;
Step 2, the maximum instantaneous electric current setting sub-laser moment fusion welding motor are 800 peaces; Minimum striking current is 1.5 peaces; Continuous operation electric current is 100 peaces; Interval work electric current is 200 peaces and energy-conditioning range is 0 to 100 joule; Pulse regulation scope: 1 to 12 hertz; Duration adjustable range is 0.04 to 0.8 second;
Step 3, the welding gun of sub-laser moment fusion welding motor to be fitted on solder to weld out a diameter 5 millimeters, thickness is the solder joint of 0.5 ~ 1.5 millimeter; Carry out continuously welding until solder joint forms the face of weld.
2. the sub-laser of power station according to claim 1 macrotype axes series damaged surfaces molten bead-welding technology instantaneously, it is characterized in that, described technique also comprises: clean solder with cleaning agent.
3. the sub-laser of power station according to claim 2 macrotype axes series damaged surfaces molten bead-welding technology instantaneously, it is characterized in that, described cleaning agent is acetone.
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| CN201210312363.XA CN102941391B (en) | 2012-08-29 | 2012-08-29 | Sub laser instant fusion build-up welding process for damaged surface of large shaft of power station |
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| CN201210312363.XA CN102941391B (en) | 2012-08-29 | 2012-08-29 | Sub laser instant fusion build-up welding process for damaged surface of large shaft of power station |
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| CN102941391B true CN102941391B (en) | 2015-04-15 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103753020B (en) * | 2014-01-17 | 2015-09-09 | 河南科技大学 | A kind of laser welding technique of Zn-Al alloy |
| CN111590170B (en) * | 2019-02-21 | 2021-12-21 | 上海亚尔光源有限公司 | Forming method of high-toughness bending sub-needle |
| CN114734128A (en) * | 2022-03-30 | 2022-07-12 | 大唐锅炉压力容器检验中心有限公司 | Welding repair method for valve seat sealing surface |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1013372A1 (en) * | 1997-03-28 | 2000-06-28 | Nippon Steel Corporation | Method and apparatus for butt welding of hot rolled billet with laser beam |
| JP3061268B1 (en) * | 1999-02-15 | 2000-07-10 | 吉輝 細田 | Melt processing equipment using laser light and arc |
| CN1674408A (en) * | 2004-03-26 | 2005-09-28 | 沈阳大陆激光技术有限公司 | Electric power generator, steam turbine rotor spindle repaired by laser and repairing method thereof |
| CN101700594A (en) * | 2009-11-26 | 2010-05-05 | 兰州瑞迈克电力科技有限公司 | On-site unstressed surfacing repairing process of large rotor journal sealing bush abrasion part |
| CN101947717A (en) * | 2010-09-03 | 2011-01-19 | 刘巨东 | Method for preparing composite worm or bearing bush |
-
2012
- 2012-08-29 CN CN201210312363.XA patent/CN102941391B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1013372A1 (en) * | 1997-03-28 | 2000-06-28 | Nippon Steel Corporation | Method and apparatus for butt welding of hot rolled billet with laser beam |
| JP3061268B1 (en) * | 1999-02-15 | 2000-07-10 | 吉輝 細田 | Melt processing equipment using laser light and arc |
| CN1674408A (en) * | 2004-03-26 | 2005-09-28 | 沈阳大陆激光技术有限公司 | Electric power generator, steam turbine rotor spindle repaired by laser and repairing method thereof |
| CN101700594A (en) * | 2009-11-26 | 2010-05-05 | 兰州瑞迈克电力科技有限公司 | On-site unstressed surfacing repairing process of large rotor journal sealing bush abrasion part |
| CN101947717A (en) * | 2010-09-03 | 2011-01-19 | 刘巨东 | Method for preparing composite worm or bearing bush |
Non-Patent Citations (1)
| Title |
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| 激光熔覆技术应用于轴类零件表面修复的实验研究;李宝灵等;《应用激光》;20070815;第27卷(第4期);第290-294页 * |
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