CN101559517A - Explosive welding method of C276 nickel-based alloy clad steel plate - Google Patents
Explosive welding method of C276 nickel-based alloy clad steel plate Download PDFInfo
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- CN101559517A CN101559517A CNA200810233242XA CN200810233242A CN101559517A CN 101559517 A CN101559517 A CN 101559517A CN A200810233242X A CNA200810233242X A CN A200810233242XA CN 200810233242 A CN200810233242 A CN 200810233242A CN 101559517 A CN101559517 A CN 101559517A
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Abstract
The invention relates to an explosive cladding process for metals. The process is characterized by comprising the following steps: substrate treatment, composite treatment, applying and pairing, explosive cladding, repair welding, heat treatment and post-treatment. The process can help clad C276 nickel-based alloys with general steel plates effectively so that the clad steel plates can have the required strength on the premise of owning all the advantages of the C276 nickel-based alloys, thus saving consumption of expensive metals. The clad steel plates have high welding quality, and can certainly remain stable in long-term use without sealing off.
Description
Affiliated technical field
What the present invention relates to is the metallic explosive combination process.
Background technology
The C276 alloy is a kind of Ni-Cr-Mo alloy of tungstenic, has extremely low silicon and carbon.Usually be considered to omnipotent corrosion-resisant alloy.This alloy has following characteristic: 1. in oxidation and reduction two atmosphere states, most of corrosive mediums are had excellent decay resistance.2. outstanding anti-spot corrosion, crevice corrosion and stress crack corrosion performance are arranged.The C276 alloy is applicable to the various chemical industry that contain oxidation and reducing medium.Higher molybdenum, chromium content make the alloy can anti-chlorine ion corrosion, and W elements has further improved corrosion resistance.Simultaneously, the C276 alloy is one of material of only several humidity chlorine, hypochlorite and ClO 2 solution corrosion, and the chlorate solution of high concentration such as iron chloride and copper chloride are had significant corrosion resistance.Because C276 carbon, silicone content are low, separating out of heat affected area carbide is controlled, thereby has improved decay resistance better.Just because of this, C276 by widely as the equipment of working under the severe rugged environment such as the scrubbing tower in the reactor of equipment under heat exchanger, corrugated expansion joint, chemical industry equipment, flue gas desulfurization and denitrification, paper industry, the sour environment and element, acetate and acidic products, the PGD system, condensation of sulfuric acid device etc.But, satisfy the needs of intensity again, so C276 and common metal composite need be used because the market price of C276 is higher.
Explosion welding technique is the high-voltage pulse load that produces by explosive detonation, promote the another kind of material (base material) of a kind of material (multiple material) high speed inclined impact, its loading stress is higher than the yield strength of metal material far away, the moment property of loading procedure (generally with millisecond meter), the locality of material stand under load, interweaving occurs in the small adjacent domain of application point and mode such as moves at high speed, realizes the metallurgical binding of two kinds of metals, and the land is rendered as wavy metallurgical binding.Explosive welding is again the new and high technology a kind of of great practical value of carrying out the intermetallic welding and producing metallic composite as the energy with explosive.Its maximum characteristics are metallic combination to be welded together simple, rapid and strongly in moment.The advantage of comparing explosion welding technique with solder technology such as rolling, built-up welding, casting is:
Material adaptability and solderability are applicable to most ductile metal or alloy widely; Especially for the welding of large-area metal, can be described as unique method of attachment; Be not only applicable to the combination of intermiscibility metal, and be applicable to the combination of non-intermiscibility metal, be applicable to the metal and the alloy of compound between easy generation brittle metal yet; Have good thermal conductivity, low interface resistance, the land does not have the heat affected area and constitutes good joint performance, and the thermal process of moment does not have the interface or a spot of dissolving is only arranged.
Summary of the invention
The explosion welding method that the purpose of this invention is to provide a kind of C276 nickel-based alloy composite steel plates is to remedy the deficiency of prior art.
The object of the present invention is achieved like this: the explosion welding method of C276 nickel-based alloy composite steel plates is characterized in that: may further comprise the steps:
A, base material treatment: smoothing makes steel plate unevenness＜5mm/m; And whole plate face≤10mm/ total length (wide); Tube sheet plate face unevenness＜1.5mm/m; And whole plate face≤2.5mm/ total length (wide); Again with the steel plate horizontal positioned, use emery wheel to polish, remove surface irregularities, make any surface finish, smooth, surface roughness is Ra12.5 μ m, it is bright and clean to carry out rubbing down again;
B, multiple material are handled: the plate face unevenness＜5mm/m that guarantees the C276 nickel-base alloy; And whole plate face≤10mm/ total length (wide); Tube sheet plate face unevenness＜1.5mm/m; And whole plate face≤2.5mm/ total length (wide); Set level again, use abrasive band or impeller bright and clean along the length polishing;
C, brushing and pairing: the C276 nickel-base alloy is coated with brushes multiple material protective agent, with the steel plate pairing, place by interruption between pairing back C276 nickel-base alloy and the steel plate then, avoid direct friction and damage C276 nickel-base alloy surface;
D, the blast compound: with the steel plate horizontal positioned, the parallel thereon placement of C276 nickel-base alloy is evenly placed explosive at C276 nickel-base alloy outer surface, passes through cap sensitive, under high brake pressure, the surface of C276 nickel-base alloy and steel plate just bonds together firmly;
E, repair welding: explode compound after, clad steel plate detects not through 100%UT that recombination region gives repair welding;
F, heat treatment: the clad steel plate after the repair welding is heat-treated, and to eliminate the stress that explosion time produces, guarantees every performance and the weld seam and the requirements of material decay resistance again such as intensity of base material;
G, subsequent treatment: the clad steel plate after the heat treatment through smoothing, is cut edge, get product behind machine glazed finish or the acid wash passivation.
The explosion welding method of described C276 nickel-based alloy composite steel plates is characterized in that: when the material of writing in reply was handled, during C276 nickel-base alloy thickness 〉=5mm, periphery should be slotted;
The explosion welding method of described C276 nickel-based alloy composite steel plates is characterized in that: the C276 nickel-base alloy can splice before the material of writing in reply is handled.
The explosion welding method of described C276 nickel-based alloy composite steel plates is characterized in that: described multiple material protective agent is a waterglass, and its concentration (° Be) is 16-20.
The good effect of invention
Method provided by the invention can be effectively compound with C276 nickel-base alloy and general steel plate, thereby guaranteeing that clad steel plate has under the prerequisite of all advantages of C276 nickel-base alloy, had the intensity of needs, thereby saved the use amount of expensive metal.The product that while this method provides has very high welding quality, guarantees that steady in a long-term the use can not come off.
Below by embodiment the present invention is further described:
The specific embodiment
Embodiment:
The base material technology for blanking:
Steel plate should have quality certificate, indicates clear; The steel plate that material has Ultrasonic Detection to require should be qualified through Ultrasonic Detection as requested; The grade of steel of material, specification, examination of materials numbering are consistent with the follow-up of quality card.
By the feed intake specification line of follow-up of quality card, the angle that should guarantee steel plate four limit dimension lines during line is the right angle.The length of steel plate and width difference are 0-5mm, and the diagonal error is not more than 3mm.
Check the surface quality of steel plate, qualified if the discovery surface of steel plate should in time be handled when mass defect is arranged.Carry out gas cutting or shearing by line, allow to stay an amount of reconditioning surplus, shear the back deburr, should remove slag during gas cutting, cut surface should be vertical and smooth bright and clean with the steel plate face, must not scab, defectives such as zigzag, pit, when above-mentioned defective occurring, allow reconditioning to reach the cutting surfacing.
Should smooth when steel plate plate face unevenness 〉=5mm/m or whole plate face＞10mm/ total length (wide), after smoothing the unevenness of steel plate plate face should＜5mm/m, and whole plate face≤10mm/ total length (wide).
Clad tubesheet should be smoothed during with steel plate plate face unevenness 〉=1.5mm/m or whole plate face＞2.5mm/ total length (wide), after smoothing the unevenness of steel plate plate face should＜1.5mm/m, and whole plate face≤2.5mm/ total length (wide).
Multiple material technology for blanking:
Check material, the specification of C276 nickel-base alloy.When if the C276 nickel-base alloy need splice, its splicing requires as follows: when the width of C276 nickel-base alloy need splice, the splicing width dimensions 〉=300mm of C276 nickel-base alloy in the time can not satisfying, spliced the width minimum dimension and answers＞250mm in principle; When the length of C276 nickel-base alloy need be spliced, answered≤L/4 position of center line (L is a C276 nickel-base alloy total length) the splicing welding joint position of C276 nickel-base alloy.Assembling and spot welding should adopt the welding rod with product welding same model, specification, every 100mm spot welding a bit, and the about 4-6mm of spot welding length.Grinding and buffing weld seam again.
Cleaning roll-type purl machine before unreeling, foreign material that equipment such as plate shearing machine are inside and outside and dust, and the roller of wiping roll-type purl machine if feel will polish smooth with crocus cloth when rough, are used wooden stick and are transmitted when unreeling, prevent C276 nickel-base alloy surface tear.
Shear is sheared by line, keeps line, deburring again.Plasma cutting keeps line by the line cutting, removes slag, and with grinder buffing scarfing acute angle.
When C276 nickel-base alloy thickness 〉=5mm, periphery should be slotted: the center line of groove is 10-20mm with the distance of multiple edge line, and the bottom surface of groove is 2-4mm with the distance of the bottom surface of multiple material; Because multiple material is in compound, under the effect of powerful impulsive force, the edge of multiple material can be sheared under the effect of shearing force and come off, the end face of that multiple material and base material will be concordant, when the thickness of answering material was big, shearing force was not enough to reach requirement, will influence the edge quality of composite plate, in order to be effective, just can be at the desired location fluting so that come off smoothly.Groove is processed on planer or lathe; If, should guarantee the notch size as far as possible with the carbon arc air gouging fluting.Should be coated with the anti-coating that splashes before the gouge, answer the splash and the oxide of sand milling both sides behind the gouge.
Smoothing: the plate face unevenness 〉=5mm/m of C276 nickel-base alloy or and should smooth plate face after smoothing during whole plate face＞10mm/ total length (wide); Unevenness＜5mm/m; And whole plate face≤10mm/ total length (wide); Clad tubesheet should be smoothed during with steel plate plate face unevenness 〉=1.5mm/m or whole plate face＞2.5mm/ total length (wide) with plate face clad tubesheet, after smoothing the unevenness of steel plate plate face should＜1.5mm/m, and whole plate face≤2.5mm/ total length (wide).
The base material technique for grinding:
The buffed surface of steel plate composite surface is wanted evenly not allow defectives such as oxide skin, pit, pit, and will guarantee steel plate thickness.
Thick polishing is with No. 36 grinding wheels when 60mm (steel plate thickness＜) or No. 24 grinding wheels when 60mm (steel plate thickness 〉=), and discovery oxide skin, pit, pit and polishing when inhomogeneous when slightly polishing polished after should in time handling again; Should in time remove the abrasive dust on polishing surface behind the thick polishing back.Foreign material such as oxide skin, laying dust.
The essence polishing should in time be removed foreign material such as the surperficial iron filings of polishing, laying dust with No. 60 grinding wheels after the smart polishing; Buffed surface after the smart polishing is smooth, bright and clean.Its surface roughness Ra 12.5 μ m.
It is bright and clean that steel plate plate face after the polishing carries out rubbing down uniformly with stainless steel wire wheel.
Multiple material technique for grinding:
It is bright and clean that the polishing of C276 nickel-base alloy adopts abrasive band or impeller to polish along the length direction, if C276 nickel-base alloy surface defectiveness can adopt the abrasive band to polish in the time of need polishing.
Polishing is wanted evenly not allow defectives such as oxide skin, pit, pit to occur, the thickness of the multiple material of revisal C276 nickel-base alloy.Should in time remove foreign material such as the surperficial abrasive dust of polishing, laying dust after the polishing.
The multiple material surface of C276 nickel-base alloy after the polishing should be smooth, presents metallic luster.
Multiple material protective agent brushing technique:
Substrate of steel plate and the multiple material of C276 nickel-base alloy are matched, and again with C276 nickel-base alloy external coating waterglass, its concentration (° Be) is 16-20, and the foam brush or the spray gun that are coated with waterglass must keep clean.Explode compound before, should strict control base material and multiple material between intermittence, guarantee composite quality.
It is compound to explode: with the steel plate horizontal positioned, the parallel thereon placement of C276 nickel-base alloy is evenly placed explosive at C276 nickel-base alloy outer surface, and the explosion velocity of explosive is 1.8 * 10
3-2.2 * 10
3M/s, brisance are that 6-10mm, density are 0.6g/cm
-3-0.85g/cm
-3, by cap sensitive, under high brake pressure, the surface of C276 nickel-base alloy and steel plate just bonds together firmly.
Repair welding:
Explode compound after, detecting not through 100%UT, recombination region gives repair welding.The compound back Surface Defects in Steel Plate degree of depth is no more than the defective partly of composite plate tolerance and is polished smoothly.
Treating to brush the anti-coating that splashes around the repair welding district in the 100mm scope, on the carbon arc air gouging direction, except that adopting the anti-coating that splashes, the Ying Zuofang dividing plate that splashes also, the splash damage plate surface when not allowing gouge.With carbon arc air gouging will be not the multiple layer of bound fraction remove, then with emery wheel will the gouge surface around polishing clean, and basic unit ground off 0.5-1mm, grind 50-60 degree oblique angle on every side.According to the regulation welding of " stainless compound steel plate welding procedure rules ", should adopt Φ 2.5mm welding rod and little electric current to connect a circle after the repair welding of multiple layer, then to reduce the depression at melt run place along melt run.
Repair welding place is earlier smooth with the emery wheel corase grind after the repair welding, then with the sand ribbon polishing, last repair welding place and around in the 100mm scope, should be through UT and PT passed examination.
Technology for Heating Processing:
Clad steel plate after the repair welding is heat-treated, and to eliminate the stress that explosion time produces, guarantees every performance and the weld seam and the requirements of material decay resistance again such as intensity of base material.
Smoothing, trimming technology:
Roll-in smoothing back and forth on seven roller levelling machines or three rolls plate bending machine on the multiple course of composite plate is rule after reaching requirement, shears (composite plate thickness≤20mm) or plasma cutting (composite plate thickness＞20mm) by line again; The peripheral cut surface of composite plate four (circle) should be vertical with the plate face, and defectives such as the peripheral cut surface of composite plate four (circle) should be smooth, smooth, must not scab, zigzag, pit, if there is above-mentioned defective to allow reconditioning to reach requirement.
Mechanical polishing process or acid cleaning process:
Use impeller that the composite plate clad surface is polished or acid wash passivation after get product, the continuous mill line of its clad surface of finished product after the polishing must be consistent.
Claims (4)
1, the explosion welding method of C276 nickel-based alloy composite steel plates is characterized in that: may further comprise the steps:
A, base material treatment: smoothing makes steel plate unevenness＜5mm/m; And whole plate face≤10mm/ total length (wide); Tube sheet plate face unevenness＜1.5mm/m; And whole plate face≤2.5mm/ total length (wide); Again with the steel plate horizontal positioned, use emery wheel to polish, remove surface irregularities, make any surface finish, smooth, surface roughness is Ra12.5 μ m, it is bright and clean to carry out rubbing down again;
B, multiple material are handled: the plate face unevenness＜5mm/m that guarantees the C276 nickel-base alloy; And whole plate face≤10mm/ total length (wide); Tube sheet plate face unevenness＜1.5mm/m; And whole plate face≤2.5mm/ total length (wide); Set level again, use abrasive band or impeller bright and clean along the length polishing;
C, brushing and pairing: the C276 nickel-base alloy is coated with brushes multiple material protective agent, with the steel plate pairing, place by interruption between pairing back C276 nickel-base alloy and the steel plate then, avoid direct friction and damage C276 nickel-base alloy surface;
D, the blast compound: with the steel plate horizontal positioned, the parallel thereon placement of C276 nickel-base alloy is evenly placed explosive at C276 nickel-base alloy outer surface, passes through cap sensitive, under high brake pressure, the surface of C276 nickel-base alloy and steel plate just bonds together firmly;
E, repair welding: explode compound after, clad steel plate detects not through 100%UT that recombination region gives repair welding;
F, heat treatment: the clad steel plate after the repair welding is heat-treated, and to eliminate the stress that explosion time produces, guarantees the strength character of base material and the requirement of weld seam and multiple material decay resistance;
G, subsequent treatment: the clad steel plate after the heat treatment through smoothing, is cut edge, get product behind machine glazed finish or the acid wash passivation.
2, the explosion welding method of C276 nickel-based alloy composite steel plates as claimed in claim 1 is characterized in that: when the material of writing in reply was handled, during C276 nickel-base alloy thickness 〉=5mm, periphery should be slotted;
3, the explosion welding method of C276 nickel-based alloy composite steel plates as claimed in claim 1 is characterized in that: when C276 nickel-base alloy undersized, spliced before the material of writing in reply is handled.
4, the explosion welding method of C276 nickel-based alloy composite steel plates as claimed in claim 1 is characterized in that: described multiple material protective agent is a waterglass, and its concentration (° Be) is 16-20.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810233242XA CN101559517A (en) | 2008-12-08 | 2008-12-08 | Explosive welding method of C276 nickel-based alloy clad steel plate |
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| CNA200810233242XA CN101559517A (en) | 2008-12-08 | 2008-12-08 | Explosive welding method of C276 nickel-based alloy clad steel plate |
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| CN101559517A true CN101559517A (en) | 2009-10-21 |
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| CNA200810233242XA Pending CN101559517A (en) | 2008-12-08 | 2008-12-08 | Explosive welding method of C276 nickel-based alloy clad steel plate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109434267A (en) * | 2018-12-14 | 2019-03-08 | 安徽宝泰特种材料有限公司 | A kind of explosion welding method using C-276 alloy production composite plate |
-
2008
- 2008-12-08 CN CNA200810233242XA patent/CN101559517A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109434267A (en) * | 2018-12-14 | 2019-03-08 | 安徽宝泰特种材料有限公司 | A kind of explosion welding method using C-276 alloy production composite plate |
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Open date: 20091021 |