CN102922168A - Nickel-based welding rod for welding nickel chromium iron alloy steel - Google Patents
Nickel-based welding rod for welding nickel chromium iron alloy steel Download PDFInfo
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Abstract
The invention belongs to a nickel-based welding rod for welding nickel chromium iron alloy steel. The nickel-based welding rod comprises a core wire, a coating and an adhesive, wherein the core wire comprises the following components in percentage by weight: 2.5%<=Mn<=4.0%, 15.0%<=Cr<=18.0%, 2.0%<=Fe<=5.0%, 0.4%<=Ti<=1.0%, 1.5%<=Nb<=2.5%, Co<=0.05%, Cu<=0.30%, C<=0.04%, S<=0.010%, P<=0.025%, Si<=0.20%, the balance of Ni; and the coating comprises the following components in percentage by weight: 20 to 35% of rutile powder, 15 to 30% of cryolite, 20 to 35% of marble powder, 3 to 7% of ilmenite powder, 3 to 8% of barium carbonate, 0.5 to 1% of sodium alginate, 0.2 to 0.6% of soda ash, 3 to 6% of electrolytic manganese, and 3 to 6% of ferrocolumbium powder. The nickel-based welding rod for welding nickel chromium iron alloy steel has the advantages that the welding technology capacity is high, weld joints are smooth and bright, the appearance is nice, welding beads are in proper height, and infiltration angles of the weld joints are proper; the deposited metal is high in comprehensive mechanical performance under conditions with common temperature, ultralow temperature and high temperature, and can be applied to the working condition with high radiation; and a welding body can be safely and reliably operated within the working temperature range from -196 DEG C to 980 DEG C.
Description
Technical field
The present invention relates in a kind of welding processing welding rod, particularly a kind of GB/T13814-2008 of satisfying the welding rod to being exclusively used in of requiring of the ENi6133 resisto steel (UNS NO8800) that welding is heat-resisting, high-temperature corrosion resistance, creep rupture strength are had relatively high expectations; The welding body that adopts this welding rod to process can be in safety in-196 ℃ of ultralow temperature to 980 ℃ operating temperature ranges, reliably use.This welding rod can be used for the austenite of various compositions and the different-metal material welding between ferritic stainless steel and Langaloy, as: Inconel (Yin Kangluoyi alloy) and carbon steel, stainless steel, nickel 200, the welding of covering nickel that alloy, 70-30 corronil; The welding of corronil and nickel 200, your alloy of illiteracy nickel etc.Be particularly useful for the welding of welding processing LNG liquid nitrogen storage tank and Yin Kangluoyi 800 and 9% nickel steel.
Background technology
Nickel-base alloy refers to have a class alloy of higher intensity and certain combination properties such as antioxidant anticorrosive ability under 650～1000 ℃ of high temperature.Nickel-base alloy and contains other alloying elements take nickel as the basis, and has good corrosion resistance in some media.Mainly contain several classes such as nickel, nickel molybdenum (nickel-molybdenum iron) alloy, nickel chromium triangle (ferronickel) alloy, Ni-Cr-Mo, nickel chromium iron.Be subdivided into again nickel base superalloy according to main performance, abros, nickel-base antiwear alloy, Ni-based Precise Alloy and Ni-based marmem.
Development along with industry, the application of nickel-base alloy is more and more extensive, heat exchanger, nuclear reactor, LNG liquid nitrogen storage tank, reactor pressure vessel force container, the manufacturing of vacuum plant and the built-up welding of dissimilar steel of the various large chemical equipments that the corrosion of acidproof, resistance to oxidation and INCONEL (nichrome) make, more and more using nickel welding rod; Thereby the demand of Nickel-based Alloy Welding material is increasing.
The domestic producer that can produce the supporting welding rod of nickel-base alloy is few, and most products all establish one's own system, and coating type has slant acidity and alkalescence.Basic coating type welding rod wherein, take marble and fluorite as main, cooperate some other arc stabilizer and improve the extrusion material, this coating type welding rod skull is crisp, and diffusible hydrogen content is low, but arc stability is poor, the molten bath poor fluidity, it is bad that slag covers uniformity, takes off that slag is clean, residue easy to clean not, the appearance of weld out-of-flatness; And slant acidity coating type welding rod notification number to be CN101745759B, denomination of invention namely belong to this type of slant acidity covered electrode for " a kind of nickel-base welding rod ", this covering of an electrode adopts rutile-fluorite-ice crystal slant acidity slag system; Although it is better that this type of welding rod has arc stability, slag spreadability and appearance of weld, but exist skull hardness large, take off that slag is clean, face of weld easily stays residue, easy to clean not, and at normal temperatures tensile strength (Rm), the yield strength (Rp0.2) of deposited metal after its welding, (A) is lower for percentage elongation, the disadvantage such as all be difficult to meet the demands of the mechanical property under the ballistic work (AKV) under-196 ℃ of ultralow temperature and the 820 ℃ of high temperature.
Summary of the invention
The objective of the invention is the defective for the background technology existence, research and develop a kind of nichrome steel welding nickel-base welding rod; To be used for the welding of UNS NO8800 nichrome steel, reach in the Effective Raise weld(ing) deposit and reach on the basis of the mechanical property under-196 ℃ of ultralow temperature at normal temperature, 820 ℃ of high temperature, when realizing welding good, the arc stability of slag fluidity, slag cover evenly, splash little, the removability of slag is good, weld seam is bright, moulding is attractive in appearance, it is moderate that bead height and weld seam infiltrate the angle, and the purpose such as comprehensive good operation performance.
Solution of the present invention is high than the fusing point of ferrous alloy for the fusing point of nickel-base alloy, it is bad that arc stability often appears in the welding rod that adopts common slant acidity or basic slag system coating recipe to manufacture experimently, slag viscosity is large, the molten bath is mobile bad, and the slag skull covers inhomogeneous; Skull is hard, takes off the slag difficulty, and the residue cleaning is unclean; The shortcoming such as appearance of weld out-of-flatness, surface brightness are bad.The present invention adopts nichrome as core wire, and adopts the compound slag system coating of soda acid.Thereby nichrome steel of the present invention welding is respectively with the weight percent content of each chemical composition of core wire in the nickel-base welding rod: 2.5≤Mn≤4.0,15.0≤Cr≤18.0,2.0≤Fe≤5.0,0.4≤Ti≤1.0,1.5≤Nb≤2.5, Co≤0.05, Cu≤0.30, C≤0.04, S≤0.010, P≤0.025, Si≤0.20, surplus are Ni; The weight percent content of each composition is respectively in the coating: golden red stone flour 20～35%, cryolite powder 15～30%, marble powder 20～35%, ilmenite powder 3～7%, brium carbonate 3～8%, sodium alginate 0.5～1%, soda ash 0.2～0.6%, electrolytic manganese 3～6%, molybdenum-iron powder 3～6%, ferro-niobium powder 4～8%, the total amount of each composition are 100%; The binding agent that the powder of each composition in the coating is mixed in proportion afterwards, adds the heavy 22-28% of total composition mixes; Then send in the plodder and wrap it on core wire according to a conventional method, cure through low temperature and high temperature again; The weight of coating is the 40-50% of core wire weight in the welding rod.
TiO in the above-mentioned golden red stone flour
2〉=91%, F in the cryolite powder 〉=54%, Al 〉=15%, Na≤29%, CaCO in the marble powder
3Content 〉=96%, FeO+Fe in the ilmenite powder
2O
3〉=45%, TiO
2〉=46%, BaCO in the brium carbonate
3〉=98.5%, in the sodium alginate ash be 20～30%, Na
2O is 9.5～13.0%, Na in the soda ash
2CO
3〉=98.5%, Mn in the electrolytic manganese 〉=99.5%, Mo in the molybdenum-iron powder 〉=55%, Nb in the ferro-niobium powder 〉=50%, Si≤2.5%, Al≤2.0%, FeO.20-30%.And the binding agent of the heavy 22-28% of the total composition of described adding is sodium silicate or KP1 or potassium-sodium water glass, and its Baume concentration is 41 °～43 °.The temperature that described low temperature cures is 80-120 ℃, and the temperature that high temperature cures is 350-400 ℃.
Described nichrome steel welding is respectively with the weight percent content of the rear deposited metal composition of nickel-base welding rod welding: C≤0.03%, Mn:2.0～3.0%, Si:0.35～0.45%, S≤0.015%, P≤0.010%, Cr:14.5～16.5%, Mo:1.25～1.85%, Fe:7.0～10.5%, Cu:0.02～0.05%, Ti:0.07～0.10%, Nb:2.0～2.8%, surplus are Ni and inevitable impurity.
The Main Function of each composition is as follows in the coating raw material of the present invention:
Rutile: the Main Function of rutile is stable arc, slag making, adjusts the physical properties such as surface tension, viscosity, flowability of slag, improves and improves deslag performance, improves appearance of weld, the minimizing effect such as splash; The content of rutile in coating is 20～35%.
Ice crystal: Main Function is slag making, adjusts the physical property of slag, dehydrogenation and improve the usability of electrode energy; The content of ice crystal in coating is 15～30%.
Marble: Main Function is slag making, gas making, and stable arc improves slag basicity, improves deslag performance, and preferably desulphurizing ability and indirectly dephosphorization effect are arranged, and decomposes CO
2The protection weld seam reduces the hydrogen content in the weld metal not by oxygen, nitrogenize; The content of marble in coating is 20～35%.
Ilmenite: Main Function is slag making, impels molten drop to be vaporific transition, improves speed of welding, is conducive to weld seam and takes off slag and improve appearance of weld, can the Partial Replacement rutile, reduce the welding rod cost; The content of ilmenite in coating is 3～7%.
Brium carbonate: Main Function is slag making, gas making, stable arc, adjusts the slag physical property, improves the removability of slag and extrusion performance; The content of brium carbonate in coating is 3～8%.
Sodium alginate: adding sodium alginate is in order to increase the extrusion of welding rod; Sodium alginate content in coating is 0.5～1%.
Soda ash: soda ash can be used as lubricant, adds the extrusion that soda ash can increase welding rod in welding rod, and the stabilising arc effect is also arranged simultaneously; The content of soda ash in coating is 0.2～0.6%, and addition is crossed and caused at most the easy moisture absorption of coating.
Electrolytic manganese: the adding of electrolytic manganese mainly is excessive manganese element in the weld seam, improves intensity and the plasticity of weld metal, can play deoxidization desulfuration simultaneously, accelerate the effect of welding reaction speed; The content of electrolytic manganese in coating is 3～6%.
Molybdenum-iron: molybdenum mainly plays solution strengthening effect, also is carbide former, and is best on the impact of the heat resistance of nickel-base alloy and plasticity, thereby the solution temperature that can significantly improve γ ' phase improves the serviceability temperature of nickel-base alloy; The all right refinement weld metal crystal grain of molybdenum prevents crack sensitivity, improves weld metal intensity, impact flexibility and acidproof heat-proof ability; The content of molybdenum-iron in coating is 3～6%.
Ferro-niobium: niobium can improve the ability of intensity, plasticity and the heat-and corrosion-resistant of weld metal, and the adding of ferro-niobium mainly is transition niobium element in the weld seam, satisfies the requirement to the content of niobium, and the adding of ferro-niobium can also improve welding technological properties; The content of ferro-niobium in coating is 4～8%.
Thereby the present invention namely combines coating by mentioned component organic and cooperate with the nichrome core wire and to realize purpose of the present invention.
The present invention is because the compound slag system coating of employing soda acid cooperates the arc stability that has both overcome the welding rod existence of adopting common slant acidity or the production of basic slag system coating bad with the nichrome core wire, and slag viscosity is large; The defectives such as skull is hard, takes off the slag difficulty, and surface brightness is poor, again Effective Raise the welding rod deposited metal at normal temperatures, the mechanical property when particularly under ultralow temperature, hot conditions, using.The present invention covers evenly at good, the arc stability of when welding slag fluidity, slag, the function admirable little, that take off slag of splashing; Weld seam light, moulding are attractive in appearance, and it is moderate that bead height and weld seam infiltrate the angle, can carry out direct current reversed polarity, all-position welding and welding performance good; Welding rod deposited metal tensile strength (Rm) at normal temperatures reaches 650MPa, yield strength (Rp0.2) is that 380～390MPa, percentage elongation (A) reach 42.5～45.0%; Be on close level with external similar welding rod;-196 ℃ of ultralow temperature ballistic work AKV average out to 115.5J; And 820 ℃ of mechanical behavior under high temperature Rm:215～260MPa, yield strength (Rp0.2): 285～305MPa, percentage elongation (A) average out to 20% (820 ℃ of high temperature: Rm=210Mp, A=17% among the American I NCONEL ENiCrFe-2).Thereby nickel-base welding rod of the present invention has that welding procedure is good, weld seam is bright, moulding is attractive in appearance, and it is moderate that bead height and weld seam infiltrate the angle; The every mechanical performance index of deposited metal is all good, especially using its good combination property under ultralow temperature, hot conditions is that background technology is incomparable, the welding body of welding rod of the present invention processing can be in safety in-196 ℃ of ultralow temperature to 980 ℃ operating temperature ranges, use reliably, can fully satisfy among the GB/T13814-2008 among ENi6133 and the AWS A5.11 (Unite States Standard) to the requirement of ENiCrFe-2.
The specific embodiment
Embodiment 1:
The chemical composition of nickel chromium iron core wire (percentage by weight) is respectively in the present embodiment: C:0.013, S:0.002, P:0.003, Si:0.07, Mn:3.07, Cr:16.49, Fe:3.38, Cu:0.017, Ti:0.48, Co:0.019, Nb:1.77, surplus is Ni; The present embodiment is take preparation 250kg core wire coating as example, and each composition weight is as follows in the coating: contain TiO
2The golden red stone flour 34kg of 94.6wt% contains the cryolite powder 24kg of F55wt%, contains CaCO
3The marble powder 20kg of 98.50wt%, contain FeO+Fe
2O
348.80wt%, TiO
2The ilmenite powder 3kg of 47.07wt% contains BaCO
3The brium carbonate 3kg of 99.3wt% contains Na
2The sodium alginate 0.5kg of O 12.67wt% contains Na
2CO
3The soda ash 0.5kg of 99.1wt% contains the electrolytic manganese 5kg of Mn99.56wt%, contains the molybdenum-iron powder 4kg of Mo57.35wt%, contains the ferro-niobium powder 6kg of Nb55.52wt%; After above-mentioned each powder after the weighing mixed, to add 25kg concentration (Be ') be that 43 °, modulus are that the potassium-sodium water glass wet-mixing of 3.1M is even, the group of beating is prepared into the coating lotion, then send in the plodder it is wrapped on the core wire, cure 2 hours, 380 ℃ high temperature through 100 ℃ of low temperature again and cured 1 hour.
The prepared welding rod of the present embodiment (adopt dc reverse connection welding) carries out the welding technological properties experiment, during welding good, the arc stability of slag fluidity, slag cover evenly, splash little, the removability of slag is good; Weld seam is bright, moulding is attractive in appearance, and bead height is moderate, and it is moderate that weld seam infiltrates the angle, and full position operation performance is good; After tested: (welding rod) deposited metal composition is: C:0.024%, Mn:2.03%, Si:0.42%, S:0.010%, P:0.001%, Cr:13.73%, Mo:1.797%, Fe:9.83%, Cu:0.041%, Ti:0.0766%, Nb:2.718%, and surplus is Ni and inevitable impurity; Deposited metal mechanical property at normal temperatures: Rm=650Mpa, Rp
0.2=385Mpa, A=45%;-196 ℃ of ultralow temperature ballistic work AKV mean value 113J; High temperature 820 ℃ of mechanical property: Rm=260Mpa, A=19%.
Embodiment 2:
The core wire composition is identical with embodiment 1 in the present embodiment; Still take preparation 250kg core wire coating as example, each composition weight is as follows in the coating: golden red stone flour 22kg, cryolite powder 16kg, marble powder 35kg, ilmenite powder 5kg, brium carbonate 6kg, sodium alginate 0.5kg, soda ash 0.5kg, electrolytic manganese 5kg, molybdenum-iron powder 4kg, ferro-niobium powder 6kg; All the other are also identical with embodiment 1.The present embodiment gained welding rod welds experiment, and its welding procedure is identical with embodiment 1; The welding rod deposited metal composition is: C:0.025%, Mn:2.04%, Si:0.38%, S:0.009%, P:0.001%, Cr:14.434%, Mo:1.35%, Fe:8.44%, Cu:0.035%, Ti:0.074%, Nb:2.468%, and surplus is Ni and inevitable impurity; Deposited metal mechanical property at normal temperatures: Rm=645Mpa, Rp
0.2=390Mpa, A=42.5% ,-196 ℃ of ultralow temperature ballistic work AKV mean value 118J; High temperature 820 ℃ of mechanical property: Rm=215Mp, A=21%.
Above-described embodiment 1,2 welding experiments, two groups of deposited metal ambient temperature mechanical properties ,-196 ℃ of ultralow temperature ballistic works (AKV), 820 ℃ of every mechanical index such as mechanical behavior under high temperature are all good, can fully satisfy among the GB/T13814-2008 among ENi6133 and the AWS A5.11 (Unite States Standard) to the requirement of ENiCrFe-2.
Claims (5)
1. a nichrome steel welds and uses nickel-base welding rod, comprise core wire and wrap in the coating on core wire surface, it is characterized in that the weight percent content of each chemical composition is respectively in the core wire: 2.5≤Mn≤4.0,15.0≤Cr≤18.0,2.0≤Fe≤5.0,0.4≤Ti≤1.0,1.5≤Nb≤2.5, Co≤0.05, Cu≤0.30, C≤0.04, S≤0.010, P≤0.025, Si≤0.20, surplus are Ni; The weight percent content of each composition is respectively in the coating: golden red stone flour 20～35%, cryolite powder 15～30%, marble powder 20～35%, ilmenite powder 3～7%, brium carbonate 3～8%, sodium alginate 0.5～1%, soda ash 0.2～0.6%, electrolytic manganese 3～6%, molybdenum-iron powder 3～6%, ferro-niobium powder 4～8%, the total amount of each composition are 100%; The binding agent that the powder of each composition in the coating is mixed in proportion afterwards, adds the heavy 22-28% of total composition mixes; Then send in the plodder and wrap it on core wire according to a conventional method, cure through low temperature and high temperature again; The weight of coating is the 40-50% of core wire weight in the welding rod.
2. use nickel-base welding rod by the described nichrome steel welding of claim 1, it is characterized in that TiO in the described golden red stone flour
2〉=91%, F in the cryolite powder 〉=54%, Al 〉=15%, Na≤29%, CaCO in the marble powder
3Content 〉=96%, FeO+Fe in the ilmenite powder
2O
3〉=45%, TiO
2〉=46%, BaCO in the brium carbonate
3〉=98.5%, in the sodium alginate ash be 20～30%, Na
2O is 9.5～13.0%, Na in the soda ash
2CO
3〉=98.5%, Mn in the electrolytic manganese 〉=99.5%, Mo in the molybdenum-iron powder 〉=55%, Nb in the ferro-niobium powder 〉=50%, Si≤2.5%, Al≤2.0%, Fe0.20-30%.
3. use nickel-base welding rod by the described nichrome steel welding of claim 1, it is characterized in that the binding agent of the heavy 22-28% of the total composition of described adding is sodium silicate or KP1 or potassium-sodium water glass, its Baume concentration is 41 °～43 °.
4. use nickel-base welding rod by the described nichrome steel welding of claim 1, it is characterized in that the temperature that described low temperature cures is 80-120 ℃, the temperature that high temperature cures is 350-400 ℃.
5. by the described nichrome steel welding of claim 1 nickel-base welding rod, the weight percent content that it is characterized in that each chemical composition in the rear deposited metal of nickel-base welding rod welding is respectively: C≤0.03%, Mn:2.0～3.0%, Si:0.35～0.45%, S≤0.015%, P≤0.010%, Cr:14.5～16.5%, Mo:1.25～1.85%, Fe:7.0～10.5%, Cu:0.02～0.05%, Ti:0.07～0.10%, Nb:2.0～2.8%, surplus are Ni and inevitable impurity.
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| CN103921017B (en) * | 2014-04-25 | 2016-03-16 | 湖北船王特种焊材有限公司 | A kind of welding rod supporting containing Ni low-temperature steel |
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| US11117208B2 (en) | 2017-03-21 | 2021-09-14 | Kennametal Inc. | Imparting wear resistance to superalloy articles |
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| CN112475661A (en) * | 2021-02-04 | 2021-03-12 | 四川西冶新材料股份有限公司 | Nickel-chromium-iron coating and welding rod for welding nickel-based alloy and preparation method thereof |
| CN112475661B (en) * | 2021-02-04 | 2021-05-14 | 四川西冶新材料股份有限公司 | Nickel-chromium-iron coating and welding rod for welding nickel-based alloy and preparation method thereof |
| CN115365701A (en) * | 2022-09-29 | 2022-11-22 | 中国科学院上海应用物理研究所 | Welding rod for welding molten salt corrosion resistant nickel-based high-temperature alloy |
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