CN103878502A - Alloy tool steel welding electrode - Google Patents
Alloy tool steel welding electrode Download PDFInfo
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- CN103878502A CN103878502A CN201410143929.XA CN201410143929A CN103878502A CN 103878502 A CN103878502 A CN 103878502A CN 201410143929 A CN201410143929 A CN 201410143929A CN 103878502 A CN103878502 A CN 103878502A
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- parts
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- welding electrode
- tool steel
- alloy tool
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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
-
- 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
- B23K35/3601—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
- B23K35/3602—Carbonates, basic oxides or hydroxides
-
- 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
- B23K35/3603—Halide salts
- B23K35/3605—Fluorides
-
- 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
- B23K35/365—Selection of non-metallic compositions of coating materials either alone or conjoint with selection of soldering or welding materials
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Nonmetallic Welding Materials (AREA)
Abstract
The invention discloses an alloy tool steel welding electrode which comprises a core wire and a welding electrode coating combination. The mass ratio of the welding electrode coating combination to the core wire ranges from 28:100 to 32:100, and the core wire is made of HO8A steel. The welding electrode coating combination comprises, by weight, 25-35 parts of calcium fluoride, 30-40 parts of calcium oxide, 35-45 parts of marble, 20-30 parts of fluorite, 2-4 parts of titanium dioxide, 5-10 parts of calcium dioxide, 8-13 parts of ferrotitanium, 0.5-1.5 parts of alkali, 3-6 parts of chrome, 4-8 parts of manganese, 4-8 parts of nickel powder, 4-8 parts of ferromolybdenum, 2-6 parts of rare earth silicon, 2-6 parts of quartz and 2-6 parts of feldspar. Potassium-sodium mixed water glass serves as adhesives. The alloy tool steel welding electrode is excellent in welding processing property and high in welding strength, rigidity, plasticity and tenacity.
Description
Technical field
The present invention relates to technical field of welding materials, relate in particular to a kind of alloy tool steel welding electrode, be the alloy tool steel welding electrode of a kind of ultralow-hydrogen low high strength, high tenacity, it is mainly used in 40Cr, 45Cr, the mould bases of 5CrNiMo forging equipment configuration that be matrix, hardness HRC32～36, the welding of base.
Background technology
In forging industry, mould bases, base are very important technological equipments, the quality of its state of the art directly has influence on life-span and the product quality of mould, especially mould bases body, is mainly used on crankshaft press and friction press, high energy and electronic friction press, punch press, various forcing press, and its tonnage is large, involve great expense, dimensional accuracy is tight, the weight of mould bases body reaches 2～30 tons, cost reaches 10～6,000,000 yuan, in production and application, will bear heavier load, and environmental condition is severe.To this, the base material of mould bases should have very high intensity, rigidity and good toughness, and general enterprises is selected to 40Cr, and 40CrMo and 5CrNiMo make mould bases base material, and through quenching, after tempering, the hardness of material is HRC32-38.
In use procedure, the impact of and other factors severe due to the service condition of mould bases, base, its failure mode is mostly subsides fracture or produces larger crackle.In general, most enterprises are entirety whereabouts for the processing method of subsiding, and this method result is fast, good integrity.But after several times processing several times, its gauge is close to scrapping size, and business economic loss is large.Fracture is also the common invalidation of mould bases, base, and most enterprises feel simply helpless for fracture, can only scrap processing.Because its somewhat expensive, general enterprises only can be equipped with a set of mould bases, base, once mould bases, base fracture are scrapped, certainly will cause stopping of enterprise's production, give enterprise economically, produce on cause great predicament, if want a set of mould bases of new system, base, also need to wait for that more than 6-12 month the production cycle is long.
Certainly, the reparation form that has been is REPAIR WELDING, at present, also there are many enterprises to carry out mould bases to having cracked to carry out the exploration of built-up welding reparation, but be all difficult to successfully, its main cause is the repairing condition that the processing performance of welding electrode and the process conditions of welding are difficult to meet mould bases, majority is that the crackle producing in welding process is difficult to solve, difficulty is high, difficulty is large, has great challenge.
According to market survey, in industry, generally believe, the problem of REPAIR WELDING maximum is that demand provides a kind of strong adaptability, processing performance is good, cracking resistance is high welding rod, to adapt to produce the upper reparation to mould bases fracture, therefore, develop a kind of welding rod that possesses good welding technological properties and cracking resistance, there is very high intensity (> 1000MPa), rigidity, toughness simultaneously, become the necessary condition of REPAIR WELDING.
Summary of the invention
Technical problem to be solved by this invention is to overcome above-mentioned the deficiencies in the prior art, a kind of alloy tool steel welding electrode is provided, have good welding technological properties, very high weld strength, rigidity, plasticity and toughness for the mould bases fracture of all kinds of forcing presses configurations of forging industry, subside and carry out built-up welding reparation, mould bases after reparation can all reach technical conditions and the technological requirement of mould bases, has very high practical value, very high economic benefit and social effect.
For achieving the above object, the technical solution used in the present invention is:
A kind of alloy tool steel welding electrode, comprises core wire and electrode coating composition, and the mass ratio of described electrode coating composition and core wire is 28～32: 100;
Described core wire is HO8A steel;
Described electrode coating composition, comprise calcium oxide, calcirm-fluoride, calcite and fluorite, titanium dioxide, calcium dioxide, ferrotianium, alkali, chromium, manganese, nickel powder, molybdenum-iron, rare earth silicon, quartz, feldspar, described said components parts by weight are: calcirm-fluoride 25～35, calcium oxide 30～40, marble 35～45, fluorite 20～30, titanium dioxide 2～4, calcium dioxide 5～10, ferrotianium 8～13, alkali 0.5～1.5, chromium 3～6, manganese 4～8, nickel powder 4～8, molybdenum-iron 4～8, rare earth silicon 2～6, quartz 2～6, feldspar 2～6.
As the improvement to technique scheme, described feldspar is potassic feldspar.
As the improvement to technique scheme, described welding rod selects potassium sodium mixing water glass as bonding agent.
Advantage and good effect that the present invention has are:
Alloy tool steel welding electrode of the present invention is mainly adapted to carbon structural steels (45#), alloy tool steel (5CrNiMo, 5CrMnMo) and structural alloy steel (40Cr, 42CrMn), and to be the mould bases of matrix compound, the built-up welding reparation of associating and edger base, in the time meeting processing performance and welding performance, can reach the substrate performance before built-up welding, 400 ℃ of left and right of temperature of 400 ℃～450 ℃ of preheat temperatures, built-up welding when welding.
1, the deposited metal hot strength > 1000MPa of welding rod, a little more than the intensity of mould bases mother metal, has guaranteed the weld strength of mould bases.
2, toughness is high, deposited metal diffusible hydrogen content is low, is conducive to avoid the generation of weld crack.
3, there is certain hardness, be conducive to meet the rigidity requirement of mould bases.
4, the ratio of reasonably filling a prescription, has guaranteed good welding technological properties, can carry out comprehensive welding.
5, during the present invention has filled up, the mould bases of large-sized forging equipment carries out built-up welding and repairs required welding rod processing performance, generally be adapted to welding or the built-up welding of structural alloy steel and carbon structural steels, therefore there is very high practical value, there is very high economic benefit and enterprise development meaning.
The specific embodiment
Below in conjunction with specific embodiments and embodiment, technical scheme of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Based on the embodiment in the present invention, those of ordinary skills are not making the every other embodiment obtaining under creative work prerequisite, any modification of doing, are equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Embodiment mono-:
The alloy tool steel welding electrode of the present embodiment, comprises the composition of core wire and electrode coating, and the mass ratio of described electrode coating composition and core wire is 28: 100;
The parts by weight of described electrode coating composition are as follows:
Calcirm-fluoride 25, calcium oxide 40, marble 45, fluorite 20, titanium dioxide 2, calcium dioxide 5, ferrotianium 13, alkali 1.5, chromium 3, manganese 4, nickel powder 4, molybdenum-iron 4, rare earth silicon 2, quartz 6, potassic feldspar 2; Core wire is HO8A steel.With potassium sodium mixing water glass be binding agent, be pressed into welding rod, dry, temperature is 350 ℃, holding furnace is cold; The packing of coming out of the stove.
The deposited metal composition (wt%) of the present embodiment welding rod is as following table:
| C | Si | Mn | Ni | Mo | Cr | S | P |
| 0.15 | 0.4 | 1.8 | 1.0 | 2.0 | 2.4 | ≤0.03 | ≤0.03 |
The welding rod mechanical property of welding rod is as following table:
| Experimental project | σb(Mpa) | σs(Mpa) | δ 5(％) | Akv(J) | HRC |
| Guarantee value | 1078 | 978 | ≥25 | (40℃)27 | 32 |
Embodiment bis-:
The alloy tool steel welding electrode of the present embodiment, comprises the composition of core wire and electrode coating, and the mass ratio of described electrode coating composition and core wire is 32: 100;
The parts by weight of described electrode coating composition are as follows:
Calcirm-fluoride 35, calcium oxide 30, marble 35, fluorite 30, titanium dioxide 4, calcium dioxide 10, ferrotianium 8, alkali 0.5, chromium 6, manganese 4, nickel powder 8, molybdenum-iron 8, rare earth silicon 6, quartz 2, potassic feldspar 6; Core wire is HO8A steel.With potassium sodium mixing water glass be binding agent, be pressed into welding rod, dry, temperature is 350 ℃, holding furnace is cold; The packing of coming out of the stove.
The deposited metal composition (wt%) of the present embodiment welding rod is as following table:
| C | Si | Mn | Ni | Mo | Cr | S | P |
| 0.20 | 0.38 | 2.0 | 0.9 | 2.1 | 2.3 | ≤0.03 | ≤0.03 |
The welding rod mechanical property of welding rod is as following table:
| Experimental project | σb(Mpa) | σs(Mpa) | δ 5(％) | Akv(J) | HRC |
| Guarantee value | 1080 | 988 | ≥25 | (40℃)27 | 32 |
Adopt arc-welding method, select DC welder, reversed polarity.Select the welding rod of embodiment mono-and embodiment bis-.Welding rod uses first 350 ℃ to dry at 1 o'clock, the insulation of coming out of the stove, and ready access upon use, uranami welding electrode is selected specification Φ 4.0mm, all the other Φ 6.0mm, long 600mm.
Select DC welder, reversed polarity, the welding current of permission sees the following form:
| Welding rod specification | 4.0 | 6.0 |
| Welding current (A) | 180--250 | 250-350 |
Cover whole weldering body insulation Slow cooling with asbestos cloth afterwards, be chilled to room temperature, dismantle, do not crack through assay.
The concrete example that uses this welding rod:
The mould bases of certain enterprise 8000 tons of forging presses configuration in 2009, lower bottom base is 2200 × 1900 × 400mm, heavily approximately 16 tons, in use form middle part fracture, of serious failure, by approximately 970,000 yuan of costs at that time, base material is 5CrNiMo, injured production, if do not adopt REPAIR WELDING, new cost is 1,670,000 yuan, adopt novel welding rod welding, only used 37000 yuan, repair after precision performance good, repair so far use reached 36 months in good condition.
Renovation technique is: to body cracks output U-shaped groove (groove deeply for thickness 1/2) 450 ℃ of preheatings, be incubated 16 hours----bis-people built-up welding simultaneously, in the asbestos insulation of body outside---180 ° of-(built-up welding is complete) upsets, the another side of crackle is opened to groove, and---------400 ℃ of tempering 16 hours---air cooling----welding position is carried out to machined by drawing guarantee dimensional accuracy and technological requirement to dress watch in built-up welding.
The mould bases of certain enterprise 12000 tons of forging press configurations in 2011, lower bottom base is 2200 × 550 × 2500mm, heavily approximately 24 tons, in use form length and be 2000m fracture (several times splitting disconnection), of serious failure, by approximately 2,780,000 yuan of costs (single-piece), base material is 5CrNiMo, loss is real be heaviness, affects also very seriously, has formed the serious threat of enterprise production and management.
Final decision is used alloy tool steel welding electrode of the present invention to carry out REPAIR WELDING, its technique is that butt welding mould bases both sides are fixed------cracks exposing is opened to its thickness 1/2 unit U-shaped groove---400 ℃ of the large stove preheating of-coke > that output panelling nest position, outer surface insulation---built-up welding------built-up welding---cleaning---processing built-up welding place---cleaning---panelling---steady pin---panelling is carried out to built-up welding connection---cleaning---all---tempering---of processing-check that the crackle of opposite side is opened groove.After reparation, come into operation nearly 1 year, in order various.
Claims (3)
1. an alloy tool steel welding electrode, comprises core wire and electrode coating composition, it is characterized in that: the mass ratio of described electrode coating composition and core wire is 28～32: 100;
Described core wire is HO8A steel;
Described electrode coating composition, comprise calcium oxide, calcirm-fluoride, calcite and fluorite, titanium dioxide, calcium dioxide, ferrotianium, alkali, chromium, manganese, nickel powder, molybdenum-iron, rare earth silicon, quartz, feldspar, described said components parts by weight are: calcirm-fluoride 25～35, calcium oxide 30～40, marble 35～45, fluorite 20～30, titanium dioxide 2～4, calcium dioxide 5～10, ferrotianium 8～13, alkali 0.5～1.5, chromium 3～6, manganese 4～8, nickel powder 4～8, molybdenum-iron 4～8, rare earth silicon 2～6, quartz 2～6, feldspar 2～6.
2. alloy tool steel welding electrode according to claim 1, is characterized in that: described feldspar is potassic feldspar.
3. alloy tool steel welding electrode according to claim 1 and 2, is characterized in that: alloy tool steel welding electrode selects potassium sodium mixing water glass as bonding agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410143929.XA CN103878502A (en) | 2014-04-11 | 2014-04-11 | Alloy tool steel welding electrode |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410143929.XA CN103878502A (en) | 2014-04-11 | 2014-04-11 | Alloy tool steel welding electrode |
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| CN103878502A true CN103878502A (en) | 2014-06-25 |
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| CN201410143929.XA Pending CN103878502A (en) | 2014-04-11 | 2014-04-11 | Alloy tool steel welding electrode |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106624454A (en) * | 2017-03-10 | 2017-05-10 | 大连智讯科技有限公司 | Low hydrogen type electrode and preparation method thereof |
-
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- 2014-04-11 CN CN201410143929.XA patent/CN103878502A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106624454A (en) * | 2017-03-10 | 2017-05-10 | 大连智讯科技有限公司 | Low hydrogen type electrode and preparation method thereof |
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Addressee: Xu Feng Document name: Notification that Application Deemed to be Withdrawn |
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Application publication date: 20140625 |