CN103990918B - Welding FV520B Martensite Stainless Steel welding wire and its preparation method - Google Patents
Welding FV520B Martensite Stainless Steel welding wire and its preparation method Download PDFInfo
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- CN103990918B CN103990918B CN201410181961.7A CN201410181961A CN103990918B CN 103990918 B CN103990918 B CN 103990918B CN 201410181961 A CN201410181961 A CN 201410181961A CN 103990918 B CN103990918 B CN 103990918B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/3601—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest with inorganic compounds as principal constituents
- B23K35/3608—Titania or titanates
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
- B23K35/0255—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in welding
- B23K35/0261—Rods, electrodes, wires
- B23K35/0266—Rods, electrodes, wires flux-cored
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/368—Selection of non-metallic compositions of core materials either alone or conjoint with selection of soldering or welding materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/40—Making wire or rods for soldering or welding
- B23K35/406—Filled tubular wire or rods
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
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Abstract
Welding FV520B Martensite Stainless Steel welding wire, comprise medicine core and crust, medicine core is composed of the following components by mass percentage: 15%��35% rutile, 5%��15% zircon sand, 2%��5% quartz, 4%��10% feldspar, 2%��5% sodium carbonate, 2%��5% aluminium sesquioxide, 6%��12% aluminum magnesium alloy, 5%��10% electrolytic metal Mn, 18%��25% chromium powder, 6%��10% nickel powder, 2%��6% ferro-niobium, 1%��10% molybdenum powder, each constituent mass per-cent sum is 100%. Welding wire of the present invention, the starting the arc and arc-stabilising can be good, molten bath good fluidity, splashing particle is tiny, and after weldering, slag covers evenly, and de-slag is easy, appearance of weld is careful attractive in appearance, being applicable to large-line energy welding, the Microstructure and properties obtained after weld preheating, postweld heat treatment technique meets needs of production, reaches the welding requirement of FV520B Martensite Stainless Steel.
Description
Technical field
The invention belongs to materials processing technology field, be specifically related to a kind of welding FV520B Martensite Stainless Steel welding wire, the present invention also relates to the preparation method of this welding wire.
Background technology
FV520B is a kind of low carbon martensite PH Stainless Steel, there is excellent corrosion resisting property and the weldability close with common austenitic stainless steel, also there is good impact toughness and the lateral performance of larger cross-section coideal, it is widely used in the occasions such as gear, bolt, axle, wheel disc, blade, rotor, pump part.
At present, the relevant wlding of FV520B mainly relies on import, domestic also not about its special wlding, the ER630 welding wire of main employing and mother metal homogeneity or E410NiMo-16 welding rod. The wlding of import mainly contains special solid wire and welding rod special for special, and cost is higher.
Summary of the invention
It is an object of the invention to provide a kind of welding FV520B Martensite Stainless Steel welding wire, the welding technological properties of this welding wire and excellent in mechanical performance, meet the welding requirement of high strength, high tenacity.
It is a further object to provide the preparation method of above-mentioned welding FV520B Martensite Stainless Steel welding wire.
The technical solution adopted in the present invention is, welding FV520B Martensite Stainless Steel welding wire, comprise medicine core and crust, medicine core is composed of the following components by mass percentage: the rutile of 15%��35%, the zircon sand of 5%��15%, the quartz of 2%��5%, the feldspar of 4%��10%, the sodium carbonate of 2%��5%, the aluminium sesquioxide of 2%��5%, the aluminum magnesium alloy of 6%��12%, the electrolytic metal Mn of 5%��10%, the chromium powder of 18%��25%, the nickel powder of 6%��10%, the ferro-niobium of 2%��6%, the molybdenum powder of 1%��10%, the mass percent sum of each component is 100%.
The feature of the present invention is also,
Crust adopts common 304 stainless steel cold-rolled steel bands to prepare as starting material.
Another technical scheme of the present invention is, the preparation method of welding FV520B Martensite Stainless Steel welding wire, specifically implements according to following step:
Step 1, take respectively by mass percentage 15%��35% rutile, 5%��15% zircon sand, 2%��5% quartz, 4%��10% feldspar, 2%��5% sodium carbonate, 2%��5% aluminium sesquioxide, 6%��12% aluminum magnesium alloy, 5%��10% electrolytic metal Mn, 18%��25% chromium powder, 6%��10% nickel powder, the ferro-niobium of 2%��6%, the molybdenum powder of 1%��10%, the mass percent sum of each component is 100%;
Step 2, puts in spraying type tablets press after rutile, zircon sand, quartz, feldspar, sodium carbonate and aluminium sesquioxide are carried out be dry mixed process in mixed powder machine, makees binding agent with water and carry out granulation, and grain diameter controls at 2��3mm;
Step 3, particle step 2 obtained is broken after oversintering, and filtering out granularity is 60��100 object medicinal powder;
Step 4, medicinal powder step 3 obtained mixes with aluminum magnesium alloy, electrolytic metal Mn, chromium powder, nickel powder, ferro-niobium and molybdenum powder, obtains medicine core powder;
Step 5, medicine core powder step 4 obtained is placed on flux-cored wire production unit charging machine, prevent putting on band machine by common 304 stainless steel cold-rolled steel bands of wide 10mm, thick 0.3mm, through steel strip cleaning device, carry out alkali cleaning, warm water cleans, the clean of oven dry, carries out rolling U-type groove subsequently and adds powder operation, control filling ratio 20 �� 0.5%, carry out steel band by forming machine subsequently to heal up, form the welding wire of diameter 3.8mm;
Step 6, welding wire step 5 obtained is placed on rough equipment, subtracts footpath process through 6 roads, then draws on the paying out machine of production line in essence, carry out 9 grades of essences subtracting footpath and draw process, obtain the welding wire that diameter is 2.4mm.
The feature of the present invention is also,
In step 1, rutile, zircon sand, quartz, feldspar, sodium carbonate and aluminium sesquioxide dried 1.5��1.8h before taking at 250��280 DEG C; Aluminum magnesium alloy, electrolytic metal Mn, chromium powder, nickel powder, ferro-niobium and molybdenum powder dry 1.0��1.5h before taking at 150��180 DEG C.
Being dry mixed the treatment time in step 2 is 0.5��0.8h.
Sintering temperature 700��750 DEG C in step 3, the time is 0.5��0.8h.
The invention has the beneficial effects as follows,
1. the present invention welds FV520B Martensite Stainless Steel welding wire, by control denitrogenation, the adding of oxygen agent (Al-Mg alloy powder, ferromanganese), slag making, the gas making function being equipped with rutile, zircon sand and carbonate again, reach good slag-gas-Jin trinity from protected effect; The starting the arc and arc-stabilising can be good, molten bath good fluidity, splashing particle is tiny, after weldering, slag covers evenly, de-slag is easy, and appearance of weld is careful attractive in appearance, is applicable to large-line energy welding, the Microstructure and properties obtained after weld preheating, postweld heat treatment technique meets needs of production, reaches the welding requirement of FV520B Martensite Stainless Steel.
2. the present invention welds the preparation method of FV520B Martensite Stainless Steel welding wire, medicinal powder is after pretreatment, granularity is comparatively even, the proportion of mineral powder is greatly improved, the filling ratio of medicinal powder can be good at control, and meanwhile, the mobility of medicinal powder is better, the welding wire medicinal powder produced is even, stable performance.
Accompanying drawing explanation
Fig. 1 is the metallographic structure figure of Weld pipe mill after the welding wire welding using the embodiment of the present invention 1 to prepare;
Fig. 2 is the metallographic structure figure of Weld pipe mill after the welding wire welding using the embodiment of the present invention 2 to prepare;
Fig. 3 is the metallographic structure figure of Weld pipe mill after the welding wire welding using the embodiment of the present invention 3 to prepare.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
The present invention welds FV520B Martensite Stainless Steel welding wire, comprise medicine core and crust, medicine core is composed of the following components by mass percentage: the rutile of 15%��35%, the zircon sand of 5%��15%, 2%��5% quartz, 4%��10% feldspar, 2%��5% sodium carbonate, 2%��5% aluminium sesquioxide, 6%��12% aluminum magnesium alloy, 5%��10% electrolytic metal Mn, 18%��25% chromium powder, 6%��10% nickel powder, the ferro-niobium of 2%��6%, the molybdenum powder of 1%��10%, the mass percent sum of each component is 100%. Crust adopts common 304 stainless steel cold-rolled steel bands to prepare as starting material.
The effect of welding wire Chinese medicine each component of core of the present invention:
Rutile: the main component of rutile is TiO2, adding of rutile, make electrode coating realize the characteristic of " short slag " in the process of welding fusing, due to TiO2Under welding high temperature, viscosity is lower, and sprawling of weld seam molten metal is very favourable, and when electric arc removes a certain region, this region TiO2Viscosity will sharply increase, thus effectively ensure welding rod to the adaptability of the welding of all positon vertical downward. Rutile also plays the effect of stable electric arc simultaneously. In electrode coating, work as TiO2When content is less, when can cause welding, electric arc is unstable, but its content is too much, can cause again the decline of blow force of arc. TiO in a large amount of production reality it has been found that in electrode coating2Content when controlling rationally, it is steady arc not only, and reduces welding and splash, moreover it is possible to promotes sprawling of molten pool metal, makes appearance of weld well to reduce the formation of pore in weld seam. Rutile content of the present invention is controlled to 15%��35%.
Zircon sand: the main chemical compositions of zircon sand is ZrO2, fusing point is 2715 DEG C, has two kinds of variants, and a kind of is less than 1000 DEG C stable monoclinic crystals, and another kind is higher than quadratic crystal stable when 1000 DEG C. When being another kind of crystal by a kind of crystalline transformation there is the change of about 7% in volume, utilizes this performance can improve the deslag performance of solder flux, is conducive to de-slag. The content of zircon sand of the present invention is 5%��15%.
Quartz: quartz chemical formula is SiO2, mainly it is used as slag former. The major ingredient of the quartzite in nature is quartz, normal containing a small amount of impurity component, such as Al2O3, CaO, MgO etc., it has broad variety. Basic slag is had certain shoddye effect by quartz, and when proportioning content is too little, slag fluidity is bad, shaping variation; When proportioning content is excessive, slag is black glass shape, de-slag difficulty. The content of quartz of the present invention is 2%��5%.
Feldspar: feldspar is a kind of aluminium silicate mineral containing calcium, sodium, potassium, and it has a variety of, such as albite, lime feldspar, potassium felspar sand etc., conventional is potassium felspar sand. Welding wire is mainly used as slag former, and the physical and chemical performance of slag can be regulated, due to containing K2O and Na2O, contributes to improving arc stability, refinement molten drop and improving the effects such as fusing coefficient. The content of feldspar of the present invention is 4��10%.
Sodium carbonate: Na2CO3The generation of nitrogen pore can be suppressed when not affecting deposited metal impelling strength, because Na2CO3Decompose the CO produced2N in air-isolation can be played2Effect, reduce N2Invade the chance of molten metal, and the boiling point of Na is very low, can not remain in deposited metal the microstructure and mechanical property affecting deposited metal. The content of sodium carbonate of the present invention is 2%��5%.
Aluminium sesquioxide: Al2O3The viscosity of slag can be adjusted, improve the mobility of slag, make weld seam ripple fine and closely woven. But work as Al2O3When content is more than 5%, viscosity coefficient of dross also can raise, and viscosity is too high, and weld seam easily produces undercut. The content of aluminium sesquioxide of the present invention is 2%��5%.
Aluminum magnesium alloy: Al-Mg alloy is reductor conventional in self-protection flux-cored wire. Therefore Mg add the add-on that can reduce Al, thus be beneficial to the content of Al in control deposited metal. In alloy, the boiling point of Mg is lower, produces Mg steam, it is possible to reduce the nitrogen partial pressure in electric arc atmosphere under the effect of welding electric arc, but consumption crosses the very big flue dust of conference generation, and splashing is increased. Al has deoxidation, nitrogen fixation, is conventional reductor and nitrogen fixation agent, it is possible to effectively prevent the generation of pore in weld seam, play a very good protection. In aluminium and deposited metal oxygen reaction equation be:
4Al+3O2=2A12O3
Meanwhile, aluminium is again strong nitrogen fixation agent, and aluminium can generate stable nitride with nitrogen effect and be insoluble to liquid steel, thus effectively prevent the N of supersaturation in deposited metal and be combined into N2Bubble, has stopped deposited metal and has produced pore. In molten bath, the reaction of aluminium and nitrogen is:
[Al]+[N]=[AlN]
Al is combined with nitrogen and generates AlN, but when the content of denitrogenation product A lN reaches certain limit in weld seam, the low-temperature impact toughness of weld seam will be made seriously to decline, and Al can make crystal grain thick, worsening the plasticity and toughness of weld seam, therefore, in control deposited metal, the content of Al is extremely important. Test it has been found that in deposited metal during A1-Mg too high levels, the fraction of coverage of slag reduces greatly, because under the effect of high-temperature electric arc, with MgO and A1 that other substance reaction generates2O3Improve the surface tension of slag, the viscosity of slag increased, mobility be deteriorated, slag is easily assembled agglomerating, can not uniform fold at weld face. This test occurring, the reason that slag lid is incomplete is because the add-on of Al-Mg is too many, and very easily oxidized, cause product MgO and A12O3Amount increase, cause viscosity coefficient of dross relatively big, mobility is not good, affects the covering quality of weld seam. Weld flue dust mainly due to the too high levels of Mg, caused by Mg steam. So, the add-on of A1-Mg of the present invention should control 6%��12%.
Electrolytic metal Mn: Mn is austenitizing stable element, it is possible to reduce the temperature of austenite to ferritic transformation. Mn in weld metal serves as solution strengthening group unit, in the scope of Mn��2.0%, along with the increase of Mn content, the quantity of acicular ferrite increases, the quantity of proeutectoid ferrite and ferrite side plate reduces, and the grain fineness number making acicular ferrite becomes more tiny, Mn also can improve the intensity of weld metal while improving weld metal toughness. Mn in welding wire also plays the effect of deoxidation, and can generate stable MnS with sulphur reaction, thus reduces the generation of low melting point phase FeS, is conducive to improving the heat resistanceheat resistant crackle of weld metal and ability that stratiform is torn. In weld seam, the mechanical property of the content Resistance of Weld Metal of Mn has a great impact, with the increase of Mn content, yield strength and the tensile strength of weld metal linearly increase, often increasing 0.01%Mn can make the yield strength of weld seam and tensile strength increase 10MPa, although Mn does not increase the room temperature impact toughness of weld metal, but significantly reduces brittle transition temperature. Manganese metal content of the present invention is 5%��10%.
Chromium powder: Cr is strongly formed and stablizes ferritic element, adds the chromium enough measured, steel both can have been made to produce a kind of ferrochrome oxide compound (FeCr) with matrix mortise in Oxidant on the basis of carbon steel2O3Passive film; Can effectively improve again the pitting potential value of steel, reduce steel to the susceptibility of spot corrosion. Cr improves corrosion proof effect and meets n/8 law. Along with the increase of Cr content, some intermetallic compounds precipitate out the tendency formed and increase, and the existence of these intermetallic compounds not only significantly reduces plasticity and the toughness of steel, and also reduces the solidity to corrosion of steel in some conditions. The content of hafnium metal powfer of the present invention is 18%��25%.
Nickel powder: Ni is austenite stabilizer element, and Ni is infinitely solid-solution in ��-Fe, also plays solution strengthening effect in weld metal, can increase acicular ferrite and precipitate out, thinning microstructure. The effect of Ni is similar to Mn, just weak compared with the effect of Mn, is weak reinforced alloys element. Within the scope of the whole speed of cooling of weld metal, Ni can make transformation temperature reduce, and make ferrite side plate start transition temperature reduction degree and be obviously greater than the reduction that acicular ferrite starts transition temperature. Time in weld metal containing Mn, this kind of effect of Ni is more conducive to the formation of acicular ferrite. The content of metal nickel powder of the present invention is 6%��10%.
The main effect of ferro-niobium: Nb-Fe is transition alloy elements, Nb is that strong carbide forms element, stable carbide NbC can be formed during high temperature, thus suppress the formation of chromium carbide, improve the solidity to corrosion of the various forms of stainless steel, particularly can postpone the sensitization time and improve anti intercrystalline corrosion performance, also be a kind of element forming precipitation hardening phase simultaneously. Precipitation strength phase under aging temp, hardened stainless steel and not damage corrosion proof precipitation phase be NbCrN, this precipitated phase results from 1050 DEG C of solution treatment, and it has extraordinary raising intensity, improves corrosion proof effect. Nb has good anti-drawability, namely along with the enhancing of Nb content, the numerical value that intensity lowers with tempering temperature and reduce. Ferro-niobium of the present invention shared mass percent in medicinal powder is 2��6%.
Molybdenum powder: Mo is ferrite former, and Mo can resist chlorion (Cl-) pitting attack that produces, and Mo be added on the intensity increasing steel while, and toughness does not reduce. It is improve solidity to corrosion, cryogenic mechanics performance, hot strength and temper resistance that Mo mainly acts on. The content of metal molybdenum powder of the present invention is 1%��10%.
The preparation method of above-mentioned welding FV520B Martensite Stainless Steel welding wire, specifically implements according to following step:
Step 1, take respectively by mass percentage 15%��35% rutile, 5%��15% zircon sand, 2%��5% quartz, 4%��10% feldspar, 2%��5% sodium carbonate, 2%��5% aluminium sesquioxide, 6%��12% aluminum magnesium alloy, 5%��10% electrolytic metal Mn, 18%��25% chromium powder, 6%��10% nickel powder, the ferro-niobium of 2%��6%, the molybdenum powder of 1%��10%, the mass percent sum of each component is 100%; Rutile, zircon sand, quartz, feldspar, sodium carbonate and aluminium sesquioxide dried 1.5��1.8h before taking at 250��280 DEG C; Aluminum magnesium alloy, electrolytic metal Mn, chromium powder, nickel powder, ferro-niobium and molybdenum powder dry 1.0��1.5h before taking at 150��180 DEG C;
Step 2, puts in spraying type tablets press after rutile, zircon sand, quartz, feldspar, sodium carbonate and aluminium sesquioxide are carried out be dry mixed process 0.5��0.8h in mixed powder machine, makees binding agent with water and carry out granulation, and grain diameter controls at 2��3mm;
Step 3, particle step 2 obtained is broken after sintering 0.5��0.8h at 700��750 DEG C, and filtering out granularity is 60��100 object medicinal powder;
Step 4, medicinal powder step 3 obtained mixes with aluminum magnesium alloy, electrolytic metal Mn, chromium powder, nickel powder, ferro-niobium and molybdenum powder, obtains medicine core powder;
Step 5, medicine core powder step 4 obtained is placed on flux-cored wire production unit charging machine, prevent putting on band machine by common 304 stainless steel cold-rolled steel bands of wide 10mm, thick 0.3mm, through steel strip cleaning device, carry out alkali cleaning, warm water cleans, the clean of oven dry, carries out rolling U-type groove subsequently and adds powder operation, control filling ratio 20 �� 0.5%, carry out steel band by forming machine subsequently to heal up, form the welding wire of diameter 3.8mm;
Step 6, welding wire step 5 obtained is placed on rough equipment, subtracts footpath process through 6 roads, then draws on the paying out machine of production line in essence, carry out 9 grades of essences subtracting footpath and draw process, obtain the welding wire that diameter is 2.4mm.
The present invention welds the preparation method of FV520B Martensite Stainless Steel welding wire, medicinal powder is after pretreatment, granularity is comparatively even, the proportion of mineral powder is greatly improved, the filling ratio of medicinal powder can be good at control, and meanwhile, the mobility of medicinal powder is better, the welding wire medicinal powder produced is even, stable performance.
Embodiment 1
Step 1, take respectively by mass percentage 30% rutile, 6% zircon sand, 2% quartz, the feldspar of 6%, the sodium carbonate (Na of 4%2CO3), the aluminium sesquioxide (Al of 3%2O3), the aluminum magnesium alloy (Al-Mg) of 6%, 5% electrolytic metal Mn (Mn), 20% chromium powder (Cr), 10% nickel powder (Ni), the ferro-niobium (Nb-Fe) of 4%, the molybdenum powder (Mo) of 4%, the mass percent sum of each component is 100%;
Step 2, puts in spraying type tablets press after rutile, zircon sand, quartz, feldspar, sodium carbonate and aluminium sesquioxide carry out be dry mixed process 0.5h in mixed powder machine, makees binding agent with water and carry out granulation, and grain diameter controls at 2��3mm;
Step 3, particle step 2 obtained is broken after sintering 0.8h at 700 DEG C, and filtering out granularity is 60��100 object medicinal powder;
Step 4, medicinal powder step 3 obtained mixes with aluminum magnesium alloy, electrolytic metal Mn, chromium powder, nickel powder, ferro-niobium and molybdenum powder, obtains medicine core powder;
Step 5, medicine core powder step 4 obtained is placed on flux-cored wire production unit charging machine, prevent putting on band machine by common 304 stainless steel cold-rolled steel bands of wide 10mm, thick 0.3mm, through steel strip cleaning device, carry out alkali cleaning, warm water cleans, the clean of oven dry, carries out rolling U-type groove subsequently and adds powder operation, control filling ratio 20 �� 0.5%, carry out steel band by forming machine subsequently to heal up, form the welding wire of diameter 3.8mm;
Step 6, welding wire step 5 obtained is placed on rough equipment, subtracts footpath process through 6 roads, then draws on the paying out machine of production line in essence, carry out 9 grades of essences subtracting footpath and draw process, obtain the welding wire that diameter is 2.4mm.
The welding wire adopting embodiment 1 to prepare, carries out all-position welding to FV520B Martensite Stainless Steel. The specification of test piece for welding is 500mm �� 155mm �� 15mm, and groove adopts double V-shaped groove. Welding condition is as shown in table 1:
Table 1 welding condition
The mechanical property of welding joint is in table 2, and welding joint is carried out metallographic experiment, and Weld pipe mill metallographic structure is as shown in Figure 1. Seam organization is tempered sorbite+lath martensite+residual austenite+secondary-precipitated phase. What wherein become parallel shape be lath martensite, it and the interlaced arrangement of tempered sorbite, formation braided; Having a small amount of residual austenite at crystal boundary place, secondary-precipitated phase then scatters in crystal boundary and crystal grain inner, mainly plays precipitation strength effect.
The mechanical property of table 2 welding joint
Embodiment 2
Step 1, according to mass percent take respectively 25% rutile, 5% zircon sand, 2% quartz, the feldspar of 7%, the sodium carbonate (Na of 5%2CO3), the aluminium sesquioxide (Al of 3%2O3), the aluminum magnesium alloy (Al-Mg) of 7%, 6% electrolytic metal Mn (Mn), 25% chromium powder (Cr), 6% nickel powder (Ni), the ferro-niobium (Nb-Fe) of 4%, the molybdenum powder (Mo) of 5%, the mass percent sum of each component is 100%;
Step 2, puts in spraying type tablets press after rutile, zircon sand, quartz, feldspar, sodium carbonate and aluminium sesquioxide carry out be dry mixed process 0.6h in mixed powder machine, makees binding agent with water and carry out granulation, and particle median size controls at 2��3mm;
Step 3, particle step 2 obtained is broken after sintering 0.7h at 720 DEG C, and filtering out granularity is 60��100 object medicinal powder;
Step 4, medicinal powder step 3 obtained mixes with aluminum magnesium alloy, electrolytic metal Mn, chromium powder, nickel powder, ferro-niobium and molybdenum powder, obtains medicine core powder;
Step 5, medicine core powder step 4 obtained is placed on flux-cored wire production unit charging machine, prevent putting on band machine by common 304 stainless steel cold-rolled steel bands of wide 10mm, thick 0.3mm, through steel strip cleaning device, carry out alkali cleaning, warm water cleans, the clean of oven dry, carries out rolling U-type groove subsequently and adds powder operation, control filling ratio 20 �� 0.5%, carry out steel band by forming machine subsequently to heal up, form the welding wire of diameter 3.8mm;
Step 6, welding wire step 5 obtained is placed on rough equipment, subtracts footpath process through 6 roads, then draws on the paying out machine of production line in essence, carry out 9 grades of essences subtracting footpath and draw process, obtain the welding wire that diameter is 2.4mm.
The welding wire adopting embodiment 2 to prepare, carries out all-position welding to FV520B Martensite Stainless Steel. The specification of test piece for welding is 500mm �� 155mm �� 15mm, and groove adopts double V-shaped groove. Welding condition is as shown in table 3:
Table 3 welding condition
The mechanical property of welding joint is in table 4, and welding joint is carried out metallographic experiment, and Weld pipe mill metallographic structure is as shown in Figure 2. Seam organization is tempered sorbite+lath martensite+residual austenite+secondary-precipitated phase. What wherein become parallel shape be lath martensite, it and the interlaced arrangement of tempered sorbite, formation braided; Having a small amount of residual austenite at crystal boundary place, secondary-precipitated phase then scatters in crystal boundary and crystal grain inner, mainly plays precipitation strength effect, and relatively example 1 is few for the addition of the shape caryoplasm point element in this embodiment, and the amount of secondary-precipitated phase is also relatively less.
The mechanical property of table 4 welding joint
Embodiment 3
Step 1, according to mass percent take respectively 28% rutile, 7% zircon sand, 4% quartz, the feldspar of 10%, the sodium carbonate (Na of 2%2CO3), the aluminium sesquioxide (Al of 2%2O3), the aluminum magnesium alloy (Al-Mg) of 10%, 5% electrolytic metal Mn (Mn), 18% chromium powder (Cr), 7% nickel powder (Ni), the ferro-niobium (Nb-Fe) of 3%, the molybdenum powder (Mo) of 4%, the mass percent sum of each component is 100%;
Step 2, puts in spraying type tablets press after rutile, zircon sand, quartz, feldspar, sodium carbonate and aluminium sesquioxide carry out be dry mixed process 0.7h in mixed powder machine, makees binding agent with water and carry out granulation, and particle median size controls at 2��3mm;
Step 3, particle step 2 obtained is broken after sintering 0.5h at 750 DEG C, and filtering out granularity is 60��100 object medicinal powder;
Step 4, medicinal powder step 3 obtained mixes with aluminum magnesium alloy, electrolytic metal Mn, chromium powder, nickel powder, ferro-niobium and molybdenum powder, obtains medicine core powder;
Step 5, medicine core powder step 4 obtained is placed on flux-cored wire production unit charging machine, prevent putting on band machine by common 304 stainless steel cold-rolled steel bands of wide 10mm, thick 0.3mm, through steel strip cleaning device, carry out alkali cleaning, warm water cleans, the clean of oven dry, carries out rolling U-type groove subsequently and adds powder operation, control filling ratio 20 �� 0.5%, carry out steel band by forming machine subsequently to heal up, form the welding wire of diameter 3.8mm;
Step 6, welding wire step 5 obtained is placed on rough equipment, subtracts footpath process through 6 roads, then draws on the paying out machine of production line in essence, carry out 9 grades of essences subtracting footpath and draw process, obtain the welding wire that diameter is 2.4mm.
The welding wire adopting embodiment 3 to prepare, carries out all-position welding to FV520B Martensite Stainless Steel. The specification of test piece for welding is 500mm �� 155mm �� 15mm, and groove adopts double V-shaped groove. Welding condition is as shown in table 5:
Table 5 welding condition
The mechanical property of welding joint is in table 6, and welding joint is carried out metallographic experiment, and Weld pipe mill metallographic structure is as shown in Figure 3. Seam organization is tempered sorbite+lath martensite+residual austenite+secondary-precipitated phase. What wherein become parallel shape be lath martensite, it and the interlaced arrangement of tempered sorbite, formation braided; Having a small amount of residual austenite at crystal boundary place, secondary-precipitated phase then scatters in crystal boundary and crystal grain inner, mainly plays precipitation strength effect.
The mechanical property of table 6 welding joint
Embodiment 4
Step 1, according to mass percent take respectively 35% rutile, 10% zircon sand, 4% quartz, the feldspar of 4%, the sodium carbonate (Na of 4%2CO3), the aluminium sesquioxide (Al of 2%2O3), the aluminum magnesium alloy (Al-Mg) of 6%, 6% electrolytic metal Mn (Mn), 18% chromium powder (Cr), 8% nickel powder (Ni), the ferro-niobium (Nb-Fe) of 2%, the molybdenum powder (Mo) of 1%, the mass percent sum of each component is 100%;
Step 2, puts in spraying type tablets press after rutile, zircon sand, quartz, feldspar, sodium carbonate and aluminium sesquioxide carry out be dry mixed process 0.8h in mixed powder machine, makees binding agent with water and carry out granulation, and particle median size controls at 2��3mm;
Step 3, particle step 2 obtained is broken after sintering 0.6h at 730 DEG C, and filtering out granularity is 60��100 object medicinal powder;
Step 4, medicinal powder step 3 obtained mixes with aluminum magnesium alloy, electrolytic metal Mn, chromium powder, nickel powder, ferro-niobium and molybdenum powder, obtains medicine core powder;
Step 5, medicine core powder step 4 obtained is placed on flux-cored wire production unit charging machine, prevent putting on band machine by common 304 stainless steel cold-rolled steel bands of wide 10mm, thick 0.3mm, through steel strip cleaning device, carry out alkali cleaning, warm water cleans, the clean of oven dry, carries out rolling U-type groove subsequently and adds powder operation, control filling ratio 20 �� 0.5%, carry out steel band by forming machine subsequently to heal up, form the welding wire of diameter 3.8mm;
Step 6, welding wire step 5 obtained is placed on rough equipment, subtracts footpath process through 6 roads, then draws on the paying out machine of production line in essence, carry out 9 grades of essences subtracting footpath and draw process, obtain the welding wire that diameter is 2.4mm.
The welding wire adopting embodiment 4 to prepare, carries out all-position welding to FV520B Martensite Stainless Steel. The specification of test piece for welding is 500mm �� 155mm �� 15mm, and groove adopts double V-shaped groove. Welding condition is as shown in table 7:
Table 7 welding condition
The mechanical property of welding joint is in table 8.
The mechanical property of table 8 welding joint
Embodiment 5
Step 1, according to mass percent take respectively 15% rutile, 10% zircon sand, 5% quartz, the feldspar of 4%, the sodium carbonate (Na of 2%2CO3), the aluminium sesquioxide (Al of 2%2O3), the aluminum magnesium alloy (Al-Mg) of 12%, 10% electrolytic metal Mn (Mn), 18% chromium powder (Cr), 6% nickel powder (Ni), the ferro-niobium (Nb-Fe) of 6%, the molybdenum powder (Mo) of 10%, the mass percent sum of each component is 100%;
Step 2, puts in spraying type tablets press after rutile, zircon sand, quartz, feldspar, sodium carbonate and aluminium sesquioxide carry out be dry mixed process 0.5h in mixed powder machine, makees binding agent with water and carry out granulation, and particle median size controls at 2��3mm;
Step 3, particle step 2 obtained is broken after sintering 0.5h at 740 DEG C, and filtering out granularity is 60��100 object medicinal powder;
Step 4, medicinal powder step 3 obtained mixes with aluminum magnesium alloy, electrolytic metal Mn, chromium powder, nickel powder, ferro-niobium and molybdenum powder, obtains medicine core powder;
Step 5, medicine core powder step 4 obtained is placed on flux-cored wire production unit charging machine, prevent putting on band machine by common 304 stainless steel cold-rolled steel bands of wide 10mm, thick 0.3mm, through steel strip cleaning device, carry out alkali cleaning, warm water cleans, the clean of oven dry, carries out rolling U-type groove subsequently and adds powder operation, control filling ratio 20 �� 0.5%, carry out steel band by forming machine subsequently to heal up, form the welding wire of diameter 3.8mm;
Step 6, welding wire step 5 obtained is placed on rough equipment, subtracts footpath process through 6 roads, then draws on the paying out machine of production line in essence, carry out 9 grades of essences subtracting footpath and draw process, obtain the welding wire that diameter is 2.4mm.
Embodiment 6
Step 1, according to mass percent take respectively 16% rutile, 15% zircon sand, 3% quartz, the feldspar of 5%, the sodium carbonate (Na of 3%2CO3), the aluminium sesquioxide (Al of 4%2O3), the aluminum magnesium alloy (Al-Mg) of 6%, 8% electrolytic metal Mn (Mn), 20% chromium powder (Cr), 8% nickel powder (Ni), the ferro-niobium (Nb-Fe) of 5%, the molybdenum powder (Mo) of 7%, the mass percent sum of each component is 100%;
Step 2, puts in spraying type tablets press after rutile, zircon sand, quartz, feldspar, sodium carbonate and aluminium sesquioxide carry out be dry mixed process 0.7h in mixed powder machine, makees binding agent with water and carry out granulation, and particle median size controls at 2��3mm;
Step 3, particle step 2 obtained is broken after sintering 0.6h at 750 DEG C, and filtering out granularity is 60��100 object medicinal powder;
Step 4, medicinal powder step 3 obtained mixes with aluminum magnesium alloy, electrolytic metal Mn, chromium powder, nickel powder, ferro-niobium and molybdenum powder, obtains medicine core powder;
Step 5, medicine core powder step 4 obtained is placed on flux-cored wire production unit charging machine, prevent putting on band machine by common 304 stainless steel cold-rolled steel bands of wide 10mm, thick 0.3mm, through steel strip cleaning device, carry out alkali cleaning, warm water cleans, the clean of oven dry, carries out rolling U-type groove subsequently and adds powder operation, control filling ratio 20 �� 0.5%, carry out steel band by forming machine subsequently to heal up, form the welding wire of diameter 3.8mm;
Step 6, welding wire step 5 obtained is placed on rough equipment, subtracts footpath process through 6 roads, then draws on the paying out machine of production line in essence, carry out 9 grades of essences subtracting footpath and draw process, obtain the welding wire that diameter is 2.4mm.
The present invention has following feature:
1. FV520B Martensite Stainless Steel whole position drug core welding wire of the present invention, the Weld Performance obtained for the welding of domestic martensitic steel is as follows:
1) tensile strength sigma of weld seamb>=980Mpa, room temperature impact toughness mean value >=80J, unit elongation mean value >=20%, relative reduction in area >=65%. Excellent over-all properties, ensure that its application in industry field.
2) tissue of weld seam is mainly tempered sorbite+lath martensite+residual austenite+secondary-precipitated phase;
2. the present invention has good welding technological properties: striking and arc-stabilising can be good, deslag performance is excellent, welding bead uniform in shaping is attractive in appearance, it is applicable to large-line energy welding, the Microstructure and properties obtained after weld preheating, postweld heat treatment technique meets needs of production, reaches the welding requirement of FV520B Martensite Stainless Steel.
3. welding wire of the present invention adopts the principle design of microalloying, and development technology is simple, with low cost, is applicable to producing and industrialization.
Claims (5)
1. weld FV520B Martensite Stainless Steel welding wire, comprise medicine core and crust, described crust adopts common 304 stainless steel cold-rolled steel bands to prepare as starting material, it is characterized in that, medicine core is composed of the following components by mass percentage: the rutile of 15%��35%, the zircon sand of 5%��15%, the quartz of 2%��5%, the feldspar of 4%��10%, the sodium carbonate of 2%��5%, the aluminium sesquioxide of 2%��5%, the aluminum magnesium alloy of 6%��12%, the electrolytic metal Mn of 5%��10%, the chromium powder of 18%��25%, the nickel powder of 6%��10%, the ferro-niobium of 2%��6%, the molybdenum powder of 1%��10%, the mass percent sum of each component is 100%.
2. weld the preparation method of FV520B Martensite Stainless Steel welding wire, it is characterised in that, specifically implement according to following step:
Step 1, take respectively by mass percentage 15%��35% rutile, 5%��15% zircon sand, 2%��5% quartz, 4%��10% feldspar, 2%��5% sodium carbonate, 2%��5% aluminium sesquioxide, 6%��12% aluminum magnesium alloy, 5%��10% electrolytic metal Mn, 18%��25% chromium powder, 6%��10% nickel powder, the ferro-niobium of 2%��6%, the molybdenum powder of 1%��10%, the mass percent sum of each component is 100%;
Step 2, puts in spraying type tablets press after rutile, zircon sand, quartz, feldspar, sodium carbonate and aluminium sesquioxide are carried out be dry mixed process in mixed powder machine, makees binding agent with water and carry out granulation, and grain diameter controls at 2��3mm;
Step 3, particle step 2 obtained is broken after oversintering, and filtering out granularity is 60��100 object medicinal powder;
Step 4, medicinal powder step 3 obtained mixes with aluminum magnesium alloy, electrolytic metal Mn, chromium powder, nickel powder, ferro-niobium and molybdenum powder, obtains medicine core powder;
Step 5, medicine core powder step 4 obtained is placed on flux-cored wire production unit charging machine, common 304 stainless steel cold-rolled steel bands of wide 10mm, thick 0.3mm are placed on band machine, through steel strip cleaning device, carry out alkali cleaning, warm water cleans, the clean of oven dry, carries out rolling U-type groove subsequently and adds powder operation, control filling ratio 20 �� 0.5%, carry out steel band by forming machine subsequently to heal up, form the welding wire of diameter 3.8mm;
Step 6, welding wire step 5 obtained is placed on rough equipment, subtracts footpath process through 6 roads, then draws on the paying out machine of production line in essence, carry out 9 grades of essences subtracting footpath and draw process, obtain the welding wire that diameter is 2.4mm.
3. the preparation method of welding FV520B Martensite Stainless Steel welding wire according to claim 2, it is characterized in that, in step 1, rutile, zircon sand, quartz, feldspar, sodium carbonate and aluminium sesquioxide dried 1.5��1.8h before taking at 250��280 DEG C; Aluminum magnesium alloy, electrolytic metal Mn, chromium powder, nickel powder, ferro-niobium and molybdenum powder dry 1.0��1.5h before taking at 150��180 DEG C.
4. the preparation method of welding FV520B Martensite Stainless Steel welding wire according to claim 2, it is characterised in that, being dry mixed the treatment time in step 2 is 0.5��0.8h.
5. the preparation method of welding FV520B Martensite Stainless Steel welding wire according to claim 2, it is characterised in that, sintering temperature 700��750 DEG C in step 3, the time is 0.5��0.8h.
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