CN105665959A - Overlaying flux-cored wire for welding and repairing die-casting dies - Google Patents
Overlaying flux-cored wire for welding and repairing die-casting dies Download PDFInfo
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- CN105665959A CN105665959A CN201610195721.1A CN201610195721A CN105665959A CN 105665959 A CN105665959 A CN 105665959A CN 201610195721 A CN201610195721 A CN 201610195721A CN 105665959 A CN105665959 A CN 105665959A
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Classifications
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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
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3053—Fe as the principal constituent
-
- 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
- B23K35/362—Selection of compositions of fluxes
-
- 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
Abstract
The invention discloses an overlaying flux-cored wire for welding and repairing die-casting dies and belongs to the field of material machining and welding. The overlaying flux-cored wire is formed by covering flux core powder through low-carbon steel strips, and the filling rate of the flux-cored wire ranges from 22% to 30%. The flux core powder comprises, by weight, 1.5-5% of sodium fluoride, 1.5-6% of calcium fluoride, 1-4% of rutile, 0.5-3% of quartz, 9-16% of high-carbon ferrochrome, 31-51% of chromium powder, 0.4-4.5% of nickel powder, 3-8% of electrolytic manganese powder, 3-10% of ferromolybdenum powder, 3-8% of silicon iron powder, 1.5-7% of ferrovanadium powder, 6.1-12% of ferrotungsten powder and the balance reduced iron powder. According to the overlaying flux-cored wire, deposited metal is high in toughness, plasticity and crack resistance; the as-welded hardness is high and still can be higher than 49 HRC after tempering at 550 DEG C, and the heat stability after heat treatment is good; the oxidation resistance and the thermal fatigue resistance are good.
Description
Technical field:
The invention belongs to processing field of welding material, it is specifically related to a kind of for the flux-cored wire of die casting welding and reparation.
Background technology:
The actual working conditions of die casting is very severe, in working process, often with the melting liquid metal contacts of 300～1000 DEG C, not only heated time is long, and the Temperature Ratio hot forged mould being heated high (to be reached 400～600 DEG C during die-cast metal, more than 1000 DEG C can be reached during pressure-casting steel iron material), the metal heated temperature of cavity surface is increased substantially, causes its hardness and intensity significantly to reduce. And, die cavity is heating and cooling repeatedly constantly, very big along section temperature difference, die casting there will be cool-hot fatigue: can produce thermal stresses effect after bearing urgency repeatedly and be hot, anxious cold, causing concentrating place to produce tiny crack gradually in the thermal stresses of die casting mold cavity surface or inside, its shape looks majority presents netted and radial. Compared with other moulds, because difference is by the metal of die casting, the effect of 150～500MPa very High Voltage to be born, design unreasonable place at die casting and will produce stress and concentrate, thus cause the brittle cracking of die casting. In addition, die cavity washes away with under etch effect at liquid metal, easily make metal adhere to mold cavity on the surface (especially aluminium alloy is more outstanding) even sometimes molten metal high pressure, at a high speed under enter mold cavity, the friction fierce to the surface generation of mold cavity and impact, make die surface produce to corrode and abrasion. In sum, die casting die cavity metallic surface there will be the various of failure such as heat fatigue cracking, overall brittle cracking, corrosion or erosion distortion, viscous deformation, abrasion under operating mode so that product requirement does not reach technological standards. Therefore, die casting will lose efficacy after generally using several thousand times, and this kind of inefficacy usually occurs within the scope of the local size of surface. Mould due to the die cavity complicated processing time long, expensive, entirety scraps the huge waste causing resource. So carrying out reparation after mould partial failure can improve die life, save production technique cost, thus the waste of the metals resources avoided.
Built-up welding is considered as a kind of method of manufacture more satisfactory, reliable and repairing mould. First, the remarkable feature of Mold stack welding technology is that firmly interatomic bond occurs for hardfacing alloy and base metals, has typical metallurgical binding, and thus overlay cladding peeling off in military service process is inclined to less; Secondly, owing to the Service Environment at position each in mould use procedure is different, failure mode is not identical yet, adopt technique for overlaying can select according to the concrete working condition of mould and failure mode or design applicable deposited metal, make die surface obtain good splitting resistance, wear resistant corrosion resistant, high temperature resistant, anti-oxidant, etc. performance, thus increase substantially die life; Further, mould generally uses more valuable steel grade manufacture, if the mould after inefficacy can not utilize will cause huge waste, adopts alloy welding deposit technique to turn waste into wealth in Making mold, it is possible to save steel valuable in a large number, reduces die manufacturing cost. Finally, this Technology is very flexible, simply, than being easier to grasps, and equipment is cheap, adapts to face wide. Along with the development that modern industry is produced, adopting overlaying method flux-cored wire to repair inefficacy die casting can avoid mould entirety to scrap, save mach expense, shorten the die production manufacturing cycle, and can effectively extend the mold use life-span, reasonable employment material is significant. The flux-cored wire of now widely used die casting built-up welding and reparation still adopts external import welding wire mostly, its price comparison is expensive, and after domestic welding wire built-up welding completes, commissure hardness is lower, at high temperature hardness and decrease in strength are obvious, and the thermal fatigue resistance of this deposited metal and wear resistance all poor. Therefore develop and a kind of there is higher red hardness, heat resistance, good temper resistance, thermal fatigue resistance, and the flux-cored wire meeting the die casting of the wear resistance and corrosion resistance of operating mode has been extremely urgent.
Summary of the invention:
It is an object of the invention to solve the current as-welded hardness and redhardneas of die casting flux-cored wire on the low side, temper resistance, thermal fatigue resistance energy and wear resistance are poor, and it is big to splash in welding process, the problem that deslag after welding is poor, possess higher as-welded hardness and temper resistance simultaneously, more than 49HRC can be remained in hardness after 550 DEG C of tempering.
Die casting iron base flux-cored wire provided by the present invention, mild-carbon steel strip parcel medicine core powder is adopted to form, flux-cored wire filling ratio is 22～30%, it is characterized in that: the medicine core powder in flux-cored wire is made up of Sodium Fluoride, Calcium Fluoride (Fluorspan), rutile, quartz and powdered alloy, and described alloy powder comprises high-carbon chromium iron, chromium powder, nickel powder, ferrotungsten powder, electrolytic manganese powder, molybdenum-iron powder, ferrosilicon powder, vanadium iron powder, reduced iron powder.
Above-described medicine core powder comprises the material of following mass percentage: Sodium Fluoride: 1.5～5%, Calcium Fluoride (Fluorspan): 1.5～6%, rutile: 1～4%, quartz: 0.5～3%, high-carbon chromium iron 9～16%, chromium powder: 31～51%, nickel powder: 0.4～4.5%, electrolytic manganese powder: 3～8%, molybdenum-iron powder: 3～10%, ferrosilicon powder: 3～8%, vanadium iron powder: 1.5～7%, ferrotungsten powder: 6.1～12%, surplus is reduced iron powder.
A kind of method preparing hardfacing alloy for the flux-cored wire of die casting built-up welding and reparation described in employing, it is characterised in that, comprise the steps:
Step 1: prepare medicine core powder according to described flux-cored wire.Mild-carbon steel strip is rolled into U shape groove, then adds in U shape groove and account for the medicine core powder that flux-cored wire gross weight is 22%～30%; U shape groove is healed up so that medicine core powder wrapped, by wortle, by road drawing, subtracts footpath wherein. The diameter of welding wire is finally made to reach 2.4mm.
Step 2: the mixed gas protected Welding that employing carbon dioxide or volume percent are 80% argon gas and 20% carbonic acid gas prepares hardfacing alloy, and welding condition is: voltage: 24-28V; Electric current: 280-320A; Wire feed rate: 430-460mm/min; Gas flow rate: 18-23L/min; Welding wire stretches out the length of ignition tip: 14-28mm.
Make the mass percentage content of alloying element in obtained deposited metal in following scope: C:0.2～0.4%; Cr:10～16%; Ni:0.1～1%; W:1～2.2; Mn:0.5～1.5%; Mo:0.5～1.5%; Si:0.6～1.6%; V:0.2～1%; Fe surplus.
Wherein the effect of various medicine core powder is as follows:
Sodium Fluoride and Calcium Fluoride (Fluorspan): slag is risen diluting effect, reduce slag fusing point, increases the mobility of slag, makes welding slag have good spreadability, and the fluorion ionized out can generate the H content that HF gas reduces weld seam, it is to increase the mechanical property of weld seam. Welding slag can be caused when but content is too much to cover weld seam uneven problem, and too much fluorion can make molten drop alligatoring increase splashing. Being added with of fluorochemical is beneficial to the hydrogen and sulphur phosphorus content that reduce in deposited metal.
Rutile: the oxidisability increasing molten drop, reduces surface tension refinement molten drop, ionizes out Ti ion and reduces electric arc ionization potential, it is to increase arc stability. Improve slag spreadability, slag detachability, but add-on can reduce the mechanical property of weld seam too much simultaneously.
Quartz: improving arc voltage, refinement molten drop, makes slag have good covering performance simultaneously.
High carbon ferro-chrome: transition C element and Cr element in deposited metal. The present invention is low carbon, and carbon add-on strictly to be controlled, and increases the content of carbon in material, by promoting the formation of martensite, the room temperature strength of steel is significantly improved. But carbon content is too high, easily obtaining plate martensite, its substructure is twin, though intensity is favourable, toughness is unfavorable, it is easy to cause weld seam to produce crackle and brittle tendency.
Chromium powder: transition chromium element in deposited metal. Chromium can improve hardening capacity and the resistance of oxidation of steel. Improve Cr element content in the alloy, contribute to forming fine and close Cr at weld face2O3Film, it is to increase alloy resistance of oxidation, and then improve the Thermal fatigue properties of die steel. And Cr unit have the effect of solution strengthening. But unstable carbide can be precipitated out when add-on is too much and reduce anti-fatigue ability.
Nickel powder: nickel element is austenite former, the unlimited solid solution of Ni and Fe energy, expands austenitic area, has crystal grain thinning, it is to increase hardening capacity. Ni element add mainly in order to increase toughness and plasticity, reduce temper brittleness to improve the resistance to cleavage of overlay cladding
Ferrotungsten powder: to weld metal transition W element, W is that strong carbide forms element, and fusing point height, can improve red hardness and the heat resistance of hardfacing alloy after being dissolved in matrix. And the avidity of W and C atom is big, easy and carbon is combined into the W of high-melting-point, high rigidity2C, WC so that surfacing hardness increases, wear resistance strengthens, it is possible to effectively stop growing up of crystal grain. Therefore adding the hardness that W element can significantly improve alloy on a small quantity, but W content is too high, easily causes hardfacing alloy thermal fatigue property poor, plasticity and toughness reduce, and early fracture easily occurs.
Molybdenum-iron powder: to weld metal transition Mo element, the fusing point of Mo is higher, can improve its recrystallization temperature, thus effectively improve the hot strength of steel after being dissolved in matrix.
Vanadium iron powder: to weld metal transition V element, V is that strong carbide forms element, plays the effect of dispersion-strengthened at high temperature, it is to increase the creep rupture strength of steel; Preventing Cr, Mo dilution, and a small amount of vanadium makes crystalline grain of steel refinement, toughness increases, and can improve the temper resistance of steel alloy simultaneously, but vanadium amount causes the carbide assembled to occur compared with Gao Shihui, reduces the intensity of alloy.
Electrolytic manganese powder: Mn is good reductor and sweetening agent, and austenitizing forms element. Manganese can reduce the speed of phase transformation in the martensite transformation temperature of alloy and alloy strongly, it is to increase hardening capacity, the quenched and tempered organization making alloy evenly, refinement.
Ferrosilicon powder: hardness and the intensity improving ferrite and austenite, can significantly improve yield strength and the yield tensile ratio of alloy, and improve its fatigue resistance; Improve resistance of oxidation.
Reduced iron powder: fill up powder core formula residue space, to ensure that powder core filling ratio meets the requirement of silk material rolling.
The preparation method of the flux-cored wire of die casting built-up welding of the present invention and reparation comprises the following steps:
First prepare medicine core powder according to described flux-cored wire, then mild-carbon steel strip is rolled into U shape groove, then in U shape groove, add the medicine core powder accounting for flux-cored wire gross weight 22～30% of the present invention; U shape groove is healed up, makes medicine core powder wrapped wherein, by wortle, by road drawing, subtract footpath, finally make its diameter reach requirement such as 2.4mm, obtain the finished product.
Die casting built-up welding and the mixed gas protected Welding preparation that reparation hardfacing alloy employing carbonic acid gas or volume percent are 80% argon gas and 20% carbonic acid gas, welding current selects 280-320A; Voltage 24-28V; Wire feed rate: 430-460mm/min; Gas flow rate: 18-23L/min; Welding wire stretches out the length of ignition tip: 14-28mm. Adopt this processing parameter can prepare the hardfacing alloy layer to meet die casting built-up welding and repairing working condition requirement.
Compared with existing flux-cored wire material, the present invention is a little:
1, deposited metal has higher toughness, plasticity and splitting resistance, and after built-up welding, crackle does not occur in repair place;
2, having higher as-welded hardness, hardness value is at more than 50HRC, and after 550 DEG C of tempering heat treatment, hardness still can remain on more than 49HRC, meets die casting to the demand of hardness and heat resistance, and after thermal treatment, temper resistance is better.
3, there is good antioxidant property and thermal fatigue resistance energy.
4, bead-welding technology better performances: arc stability, splash little, formation of weld is attractive in appearance, and deslag after welding is comparatively good.
Accompanying drawing illustrates:
Fig. 1: die casting of the present invention repairs flux-cored wire bead-on-plate weld shape appearance figure, comprises the seam center before de-slag and the seam center after de-slag;
Fig. 2 and Fig. 3: die casting of the present invention repairs flux-cored wire built-up welding deposited metal metallurgical microscopic.
Embodiment:
The substantial advantage of the present invention is illustrated further, but the present invention is not limited to following examples below by several examples.
In each embodiment same section as follows described in:
1, in embodiment, flux-cored wire crust selects specification to be that (width is 12mm to 12 × 0.3mm, thickness is 0.3mm) soft steel steel band, flux for flux-cored wire composition specifically illustrates in an embodiment, selected powder crosses 60 mesh sieve respectively, selected various powder is put into mixed powder machine mixing 10 minutes, then the medicine core powder obtained is added in the steel band groove of U shape, U shape groove is healed up, medicinal powder is wrapped up wherein.Then respectively through diameter it is: the wortle of 3.55mm, 3.2mm, 2.95mm, 2.75mm, 2.6mm, 2.5mm, 2.4mm, by road drawing, subtracts footpath, finally make its diameter reach 2.4mm, obtain flux-cored wire.
2, processing parameter is all set as by welding wire built-up welding process: voltage: 24-28V; Electric current: 280-320A; Wire feed rate: 430-460mm/min; Gas flow rate: 18-23L/min; Welding wire stretches out the length of ignition tip: 14-28mm.
The example of the present invention:
Embodiment 1:
Get Sodium Fluoride 500g, Calcium Fluoride (Fluorspan) 600g, rutile 400g, quartz 300g, high-carbon chromium iron 1118g, chromium powder 3951g, nickel powder 432g, ferrotungsten powder 611g, electrolytic manganese powder 781g, molybdenum-iron powder 526g, ferrosilicon powder 410g, vanadium iron powder 342g, reduced iron powder 29g. Being added by the medicine core powder obtained in the steel band groove of U shape, filling ratio is 27%, is healed up by U shape groove, after obtaining the flux-cored wire that diameter is 2.4mm, prepares overlay cladding by above-mentioned technique, is obtained alloying constituent in deposited metal and is: C:0.24wt.%; Cr:11.5wt.%; Ni:1wt.%; W:1wt.%; Mn:1.3wt.%; Mo:0.8wt.%; Si:0.8wt.%; V:0.4wt.%; Fe: surplus. Embodiment 2:
Get Sodium Fluoride 450g, Calcium Fluoride (Fluorspan) 300g, rutile 400g, quartz 200g, high-carbon chromium iron 932g, chromium powder 5081g, nickel powder 173g, ferrotungsten powder 854g, electrolytic manganese powder 300g, molybdenum-iron powder 329g, ferrosilicon powder 615g, vanadium iron powder 171g, reduced iron powder 195g. Being added by the medicine core powder obtained in the steel band groove of U shape, filling ratio is 27%, is healed up by U shape groove, after obtaining the flux-cored wire that diameter is 2.4mm, prepares overlay cladding by above-mentioned technique, is obtained alloying constituent in deposited metal and is: C:0.2wt.%; Cr:14wt.%; Ni:0.4wt.%; W:1.4wt.%; Mn:0.5wt.%; Mo:0.5wt.%; Si:1.2wt.%; V:0.2wt.%; Fe: surplus.
Embodiment 3:
Get Sodium Fluoride 300g, Calcium Fluoride (Fluorspan) 250g, rutile 300g, quartz 150g, high-carbon chromium iron 1397g, chromium powder 3168g, nickel powder 345g, ferrotungsten powder 1038g, electrolytic manganese powder 601g, molybdenum-iron powder 986g, ferrosilicon powder 769g, vanadium iron powder 684g, reduced iron powder 12g. Being added by the medicine core powder obtained in the steel band groove of U shape, filling ratio is 27%, is healed up by U shape groove, after obtaining the flux-cored wire that diameter is 2.4mm, prepares overlay cladding by above-mentioned technique, is obtained alloying constituent in deposited metal and is: C:0.3wt.%; Cr:10wt.%; Ni:0.8wt.%; W:1.7wt.%; Mn:1wt.%; Mo:1.5wt.%; Si:1.5wt.%; V:0.8wt.%; Fe: surplus. Embodiment 4:
Get Sodium Fluoride 200g, Calcium Fluoride (Fluorspan) 150g, rutile 100g, quartz 50g, high-carbon chromium iron 1583g, chromium powder 5075g, nickel powder 43g, ferrotungsten powder 1160g, electrolytic manganese powder 480g, molybdenum-iron powder 657g, ferrosilicon powder 307g, vanadium iron powder 171g, reduced iron powder 24g. Being added by the medicine core powder obtained in the steel band groove of U shape, filling ratio is 27%, is healed up by U shape groove, after obtaining the flux-cored wire that diameter is 2.4mm, prepares overlay cladding by above-mentioned technique, is obtained alloying constituent in deposited metal and is: C:0.34wt.%; Cr:15wt.%; Ni:0.1wt.%; W:1.9wt.%; Mn:0.8wt.%; Mo:1wt.%; Si:0.6wt.%;V:0.2wt.%; Fe: surplus.
Overlay cladding deposited metal prepared by example carries out experiment of hardness, temper resistance experiment and splitting resistance experiment, and test result is as shown in table 1, and die casting welding and reparation flux-cored wire bead-on-plate weld shape looks are shown in Fig. 1; Die casting welding and reparation flux-cored wire built-up welding deposited metal metallurgical microscopic are shown in Fig. 2 and Fig. 3.
Adopting HR-150A Rockwell hardness machine to measure hardness value, load is 150kg, deposited metal is got 7 and surveys hardness, remove a maximum and a Schwellenwert, average remaining five values, finally obtain the average Rockwell hardness number of this flux-cored wire overlay cladding.
The specimen size size of temper resistance test is identical, after sample is put into the time that chamber type electric resistance furnace is heated to the temperature of setting and is incubated setting, cools to room temperature with the furnace and takes out. Tempering temperature selects 550 DEG C, and tempering time selects 4,8,12 hours respectively. Sample under each different tempering system is carried out normal temperature hardness test, passes judgment on the quality of the temper resistance of this material with the velocity of variation of Rockwell hardness.
During cracking test, not preheating before ensureing weldering, under the prerequisite do not heat-treated after weldering, on die casting, continuous built-up welding 3 layers, observes welding bead surface after being soldered, and shows the crackle situation on welding bead by penetrant inspection technology again after smooth with grinder buffing.
Hardness (HRC) after the as-welded hardness of table 1 embodiment 1-4 deposited metal, tempering and splitting resistance
Claims (4)
1. one kind for die casting welding and repair flux-cored wire, adopt mild-carbon steel strip parcel medicine core powder, flux-cored wire filling ratio is 22～30%, it is characterized in that: the medicine core powder in flux-cored wire is made up of alloy powder and Sodium Fluoride, Calcium Fluoride (Fluorspan), rutile, quartz, and described alloy powder comprises high-carbon chromium iron, chromium powder, nickel powder, ferrotungsten powder, electrolytic manganese powder, molybdenum-iron powder, ferrosilicon powder, vanadium iron powder and reduced iron powder.
2. a kind of for the flux-cored wire of die casting welding and reparation as claimed in claim 1, it is characterized in that: the medicine core powder added contains the material of following mass percentage: Sodium Fluoride: 1.5～5%, Calcium Fluoride (Fluorspan): 1.5～6%, rutile: 1～4%, quartz: 0.5～3%, high carbon ferro-chrome 9～16%, chromium powder: 31～51%, nickel powder: 0.4～4.5%, electrolytic manganese powder: 3～8%, molybdenum-iron powder: 3～10%, ferrosilicon powder: 3～8%, vanadium iron powder: 1.5～7%, ferrotungsten powder: 6.1～12%, surplus is reduced iron powder.
3. adopt a kind of method preparing hardfacing alloy for the flux-cored wire of die casting welding and reparation of claim 1, it is characterised in that, comprise the steps:
Step 1: prepare medicine core powder according to described flux-cored wire, mild-carbon steel strip is rolled into U shape groove, then add in U shape groove and account for the medicine core powder that flux-cored wire gross weight is 22%～30%; U shape groove is healed up so that medicine heart powder wrapped, by wortle, by road drawing, subtracts footpath wherein, finally makes the diameter of welding wire reach requirement;
Step 2: the mixed gas protected Welding that employing carbon dioxide or volume percent are 80% argon gas and 20% carbonic acid gas prepares hardfacing alloy, and welding condition is: voltage: 24-28V; Electric current: 280-320A; Wire feed rate: 430-460mm/min; Gas flow rate: 18-23L/min; Welding wire stretches out the length of ignition tip: 14-28mm.
4. the hardfacing alloy that prepared by method as claimed in claim 3, it is characterised in that, in hardfacing alloy, the mass percentage content of each element is in following scope: C:0.2～0.4%;Cr:10～16%; Ni:0.1～1%; W:1～2.2%; Mn:0.5～1.5%; Mo:0.5～1.5%; Si:0.6～1.6%; V:0.2～1%; Fe surplus.
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| CN106624447A (en) * | 2016-12-27 | 2017-05-10 | 秦皇岛鸿翔焊业有限公司 | Flux-cored wire for overlaying repair remanufacturing of two intermediate rollers of Sendzimir mill and manufacturing method thereof |
| CN107186379A (en) * | 2017-05-12 | 2017-09-22 | 天长市通联焊业有限公司 | A kind of low-alloy structural steel flux-cored wire and preparation method thereof |
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| CN115476071A (en) * | 2022-10-21 | 2022-12-16 | 河南东纬装备技术有限公司 | Wear-resistant anti-cracking welding wire for surfacing and preparation method thereof |
| CN114714023B (en) * | 2022-03-30 | 2024-04-26 | 天津沃盾耐磨材料有限公司 | Titanium carbide self-protection surfacing flux-cored wire and preparation method thereof |
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| CN103862194A (en) * | 2014-03-20 | 2014-06-18 | 北京工业大学 | Surfacing flux-cored wire used for repairing hot-forging die |
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| US20180221997A1 (en) * | 2017-02-09 | 2018-08-09 | Oerlikon Schweisstechnik Gmbh | Agglomerated welding flux and submerged arc welding process of austenitic stainless steels using said flux |
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| CN110977251A (en) * | 2019-12-25 | 2020-04-10 | 安徽应流铸业有限公司 | Method for improving impact toughness of stainless steel welding rod at low temperature |
| CN113210930A (en) * | 2021-05-21 | 2021-08-06 | 泰安市瑞朗科技有限公司 | Flux-cored wire for hot forging die repair and using method thereof |
| CN113210930B (en) * | 2021-05-21 | 2022-07-26 | 泰安市瑞朗科技有限公司 | Flux-cored wire for hot forging die repair and using method thereof |
| CN114714023A (en) * | 2022-03-30 | 2022-07-08 | 天津沃盾耐磨材料有限公司 | Titanium carbide type self-protection surfacing flux-cored wire and preparation method thereof |
| CN114714023B (en) * | 2022-03-30 | 2024-04-26 | 天津沃盾耐磨材料有限公司 | Titanium carbide self-protection surfacing flux-cored wire and preparation method thereof |
| CN115476071A (en) * | 2022-10-21 | 2022-12-16 | 河南东纬装备技术有限公司 | Wear-resistant anti-cracking welding wire for surfacing and preparation method thereof |
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