CN106736002B - A kind of J507 welding rod and preparation method thereof - Google Patents
A kind of J507 welding rod and preparation method thereof Download PDFInfo
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- CN106736002B CN106736002B CN201611109158.8A CN201611109158A CN106736002B CN 106736002 B CN106736002 B CN 106736002B CN 201611109158 A CN201611109158 A CN 201611109158A CN 106736002 B CN106736002 B CN 106736002B
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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
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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
- B23K35/362—Selection of compositions of fluxes
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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
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Abstract
The invention belongs to technical field of welding materials, and in particular to a kind of J507 welding rod and preparation method thereof.A kind of J507 welding rod, coating are made of following parts by weight ingredient: 38~40 parts of marble;21~23 parts of fluorite;1.5~2.5 parts of titanium dioxide;Na2CO30.5~1.5 part;3~5 parts of ferromanganese powder;2~3 parts of ferrosilicon;12~13 parts of ferrotianium;6~8 parts of quartz.The presentation quality of J507 welding rod of the present invention is qualified, and surface zero defect, metallographic structure is excellent, and Vickers hardness and tensile strength are high, and comprehensive mechanical property is good, fully meets comprehensive performance requirement of the modern welding procedure to welding rod.
Description
Technical field
The invention belongs to technical field of welding materials, and in particular to a kind of J507 welding rod and preparation method thereof.
Background technique
J507 welding rod is typical low hydorgew sodium type basic electrode, can with Q235, Q245R typical in welding structure steel,
The steel such as Q345R.Current J507 welding rod shortcoming common on the market is that welding technological properties is good not as good as acidic electrode, mainly
Show the problems such as weld ripples is relatively thick, welding bead is in convex, and some is unsuitable for AC power source, and restarting performance is bad.With industrial skill
The fast development of art, high-strength steel using increasingly extensive, the important features such as pressure vessel, boiler, ship, heavy-duty machinery are to weld seam
The requirement of comprehensive mechanical performance increasingly improve, it is also growing to the utilization rate of basic electrode in this way.But due to basic electrode
Processing performance it is poor so that it is above very restricted in application.
J507 welding rod generally uses Si-Mn-Ti alloy system.As can composite alloy, calcium-silicon, dilute is added in welding rod
The alloys such as soil and magnesium metal have good effect to welding rod powder amount is reduced, while adjusting compositions of surfacing metal, improve the anti-gas of weld seam
Hole sensibility has certain benefit to processing property of electrode is improved.The purification of weld metal has very the mechanical property for improving welding rod
Big benefit.
The welding structure for manufacturing high quality, will not only select the base material of excellent weldability, while must have good weldering
Connect material (including welding rod, solder flux, welding wire and protective gas).The superiority and inferiority of welding material not only directly affects the matter of welding point
Amount, also affects welding productivity, product cost and health of welder etc..For mechanical property in existing J507 welding rod
Generally, the problems such as processing performance is poor prepares a kind of J507 welding rod of good combination property, is very necessary.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of J507 welding rods of good combination property.
A kind of J507 welding rod of the present invention, is made of core wire and the coating two parts being attached on core wire, wherein the coating
It is made of following parts by weight ingredient:
38~40 parts of marble;
21~23 parts of fluorite;
1.5~2.5 parts of titanium dioxide;
Na2CO30.5~1.5 part;
3~5 parts of ferromanganese powder;
2~3 parts of ferrosilicon;
12~13 parts of ferrotianium;
6~8 parts of quartz.
Further, above-mentioned a kind of J507 welding rod, wherein the coating is made of following parts by weight ingredient:
39 parts of marble;
22 parts of fluorite;
2 parts of titanium dioxide;
Na2CO31 part;
4 parts of ferromanganese powder;
2.5 parts of ferrosilicon;
12.5 parts of ferrotianium;
7 parts of quartz.
Above-mentioned a kind of J507 welding rod, wherein CaCO in the marble3Content > 97wt%, P content < 0.037wt%, S
Content < 0.037wt%;
CaF in the fluorite2Content > 90wt%, granularity are 120 mesh;
Silicon in Ferrosilicon content >=75%, granularity are 80 mesh;
The titanium dioxide is anatase titanium dioxide, wherein TiO2Content >=91.0wt%;
The ferromanganese powder is low Carbon Manganese iron powder FeMn84C0.4, wherein C content≤0.4wt%, Si content is 0.1~
0.2wt%, P are 0.15~0.3wt%, and S < 0.002wt%, granularity is 100 mesh;
The quartz Powder Particle Size is 200 mesh, wherein silicon content >=99.7wt%, 80~100ppm of iron-content, moisture≤
0.05wt%;
The titanium-iron powder selects FeTi30-A type, and wherein Ti content is 25~35wt%, Al content 8wt%, Si content
For 8wt%, Mn content is 2.5wt%.
The present invention also provides a kind of preparation methods of J507 welding rod.
The preparation method of above-mentioned J507 welding rod, comprising the following steps:
A, it ingredient: is weighed according to ingredient each in coating, for use;
B, core wire prepares: core wire surface being polished, removes surface scale, for use;
C, dry-mixed: the load weighted compositions of surfacing metal of a step is mixed;
D, wet mixing: being added binder in the material after step c is mixed, stirs, and mixes, obtains wet-milling group;
E, it suppresses: the wet-milling group that Step d obtains being put into press along the uniform pressure dressing of core wire length direction, wet-milling group is made
It pastes on core wire, dries 24 hours;
F, dry: the welding rod that step e is dried, at 250~350 DEG C dry 1.5~2.5h to get.
The preparation method of above-mentioned J507 welding rod, wherein the diameter of core wire is 3.2mm in b step.
The preparation method of above-mentioned J507 welding rod, wherein binder described in Step d is by 45 Baume degrees, modulus M=2.9
Waterglass is prepared after mixing with 5wt% methyl acrylate.
Further, the preparation method of above-mentioned a kind of J507 welding rod, wherein welding rod dries 2h at 350 DEG C in f step.
A kind of J507 welding rod of the present invention, by reasonable disposition raw material and coating constituent, in addition special binder
With manufacture craft and the method for inspection, so that the presentation quality of J507 welding rod of the present invention is qualified, surface zero defect, metallographic structure is excellent
Different, Vickers hardness and tensile strength are high, and comprehensive mechanical property is good, fully meets modern welding procedure and wants to the comprehensive performance of welding rod
It asks.
Detailed description of the invention
Fig. 1 amplifies the organization chart of the Q235 steel base material under 100 multiples;
Fig. 2 is the metallographic structure figure that weld seam amplifies 100 times;
Fig. 3 is the main view of plate type tensile specimen;
Fig. 4 is the left view of plate type tensile specimen.
Specific embodiment
A kind of J507 welding rod of the present invention, is made of core wire and the coating two parts being attached on core wire, wherein the coating
It is made of following parts by weight ingredient:
38~40 parts of marble;
21~23 parts of fluorite;
1.5~2.5 parts of titanium dioxide;
Na2CO30.5~1.5 part;
3~5 parts of ferromanganese powder;
2~3 parts of ferrosilicon;
12~13 parts of ferrotianium;
6~8 parts of quartz.
Further, above-mentioned a kind of J507 welding rod, wherein the coating is made of following parts by weight ingredient:
39 parts of marble;
22 parts of fluorite;
2 parts of titanium dioxide;
Na2CO31 part;
4 parts of ferromanganese powder;
2.5 parts of ferrosilicon;
12.5 parts of ferrotianium;
7 parts of quartz.
Above-mentioned a kind of J507 welding rod, wherein CaCO in the marble3Content > 97wt%, P content < 0.037wt%, S
Content < 0.037wt%;
CaF in the fluorite2Content > 90wt%, granularity are 120 mesh;
Silicon in Ferrosilicon content >=75%, granularity are 80 mesh;
The titanium dioxide is anatase titanium dioxide, wherein TiO2Content >=91.0wt%;
The ferromanganese powder is low Carbon Manganese iron powder FeMn84C0.4, wherein C content≤0.4wt%, Si content is 0.1~
0.2wt%, P are 0.15~0.3wt%, and S < 0.002wt%, granularity is 100 mesh;
The quartz Powder Particle Size is 200 mesh, wherein silicon content >=99.7wt%, 80~100ppm of iron-content, moisture≤
0.05wt%;
The titanium-iron powder selects FeTi30-A type, and wherein Ti content is 25~35wt%, Al content 8wt%, Si content
For 8wt%, Mn content is 2.5wt%.
Welding material includes welding rod and welding wire, wherein welding material is still based on welding rod, and application percentage is still 1. in China
Up to 70% or more;2. the purpose of welding material is hardness, wearability and the crack resistance for improving weld seam, it is especially applied to weld seam
The weld seam of region of stress concentration, these weld seams are often irregular;3. welding rod production method simple and flexible, quantity can mostly may be used
It is few, the stage is debugged in deposited metal composition, welding rod is optimal selection.Due to its deposited metal of welding rod be cooled to it is lower
Temperature after just undergone phase transition (at 350 DEG C or less), so welding rod of the present invention also known as low transformation temperature welding rod.
Welding rod is made of core wire and coating two parts attached thereto, and electrode coating and core wire weight ratio are known as coating
Weight coefficient.The weight coefficient of general acidity covered electrode is about 35%, and basic coating is slightly below this value, and surfacing welding is then
It is higher, it can be 160% or so.Using thick coating can a large amount of alloying elements of transition, also useful weight coefficient is 1%~20%
Lightly coated electrode, coating only play striking, stabilising arc.
(1) core wire
The chemical component and performance of core wire directly affect the performance and quality of weld metal, it is contemplated that and the content of carbon is higher,
Then there is stomata in weld seam and the tendency of crackle is bigger, when carbon content is greater than 0.1%~0.14%, it is possible to cause the serious of carbon
Segregation, and it is also easy to produce solidification cracking, decline the impact flexibility of weld seam and plasticity sharply, while because oxidation of coal can generate a large amount of one
Carbonoxide and easily cause to splash very much, or stay in and form stomata in weld seam.So the present invention, using low in cost, stable components can
The ordinary low-carbon steel H08A leaned on is as core wire.H08A core wire carbon content is less than 0.10%, it is ensured that postwelding weld properties are good.
Manganese is good deoxidier and mixes alloying constituent, there is desulfidation.It is demonstrated experimentally that under conditions of welding low-carbon steel,
Deoxidation effect is best when manganese content is 0.5% or so.Therefore in " H08A " core wire manganese content control 0.30%~0.55% it
Between.
Silicon is a kind of strong reducing agent, can generate SiO in the welding process2, increase the acidity and viscosity of slag, make to weld
Stomata and slag inclusion are also easy to produce in seam, and silicone content increases and can increase resistivity in core wire, so that welding rod is easy to rubescent in welding, shadow
Welding quality is rung, therefore requires silicon content more lower better in welding wire, " H08A " core wire controls below 0.03%.
Sulphur, phosphorus are all objectionable impurities, it can not only reduce the performance of steel, but also weld seam can be made to generate stomata and crackle,
Therefore it must strictly limit." H08A " core wire sulphur phosphorus content is controlled respectively in 0.04% and 0.03% or less.
Due to smelting the difference with method of deoxidation, certain non-metallic inclusions, such as Si0 are often mixed into core wire2Deng, if
When the quantity of these field trashes is sufficiently large, can also it have a certain impact to the electric conductivity of welding rod, arc-stabilising.
According to welding rod size and type difference, core wire is cut into certain full-length when manufacturing welding rod, can consult
Regulation is closed, core wire length tolerance is ± 2mm, and electrode size tolerance is ± 0.05mm.
(2) electrode coating
It coheres the mixture of various powders and adhesive on core wire and is known as coating, the mixture before not being coated with is known as applying
Expect, all needs the constituent for considering 10 kinds or so of addition to play the role of in general coated electrode above, but can be seen that certain compositions
Object can serve it is a variety of, as marble can be with stabilising arc, gas making and slag making.
A kind of preparation method of above-mentioned J507 welding rod, comprising the following steps:
A, it ingredient: is weighed according to ingredient each in coating, for use;
B, core wire prepares: core wire surface being polished, removes surface scale, for use;
C, dry-mixed: the load weighted compositions of surfacing metal of a step is mixed;
D, wet mixing: being added binder in the material after step c is mixed, stirs, and mixes, obtains wet-milling group;
E, it suppresses: the wet-milling group that Step d obtains being put into press along the uniform pressure dressing of core wire length direction, wet-milling group is made
It pastes on core wire, dries 24 hours;
F, dry: the welding rod that step e is dried, at 250~350 DEG C dry 1.5~2.5h to get.
The preparation method of above-mentioned J507 welding rod, wherein the diameter of core wire is 3.2mm in b step.
The preparation method of above-mentioned J507 welding rod, wherein binder described in Step d is by 45 Baume degrees, modulus M=2.9
Waterglass is prepared after mixing with 5wt% methyl acrylate.
Further, the preparation method of above-mentioned J507 welding rod, wherein welding rod dries 2h at 350 DEG C in f step.
The microscopic structure properties of weld of welding heat affected zone has important influence, and postwelding will ensure welding heat affected zone
Tissue distribution is uniform, and especially incomplete recrystallization section is that postwelding crackle is easiest to the position occurred.
Micro-hardness testing test uses static(al) plunging, and pressure head is a very small diamond pyramid body, hard in test
When spending, to determine that the hardness in each area is distributed according to the distribution of tissue.
The tensile strength values of welding point can react the drag of connector maximum uniform plastic deformation, and tensile sample is being born
Before maximum tension stress, deformation is uniform, but after being above maximum tension stress value, metal starts necking occur,
It generates and concentrates deformation.
At present since the processing performance of basic electrode is poor, and its processing performance depends mainly on the composition of electrode coating,
Therefore, of the invention in order to preferably study the influence of each ingredient and its proportion to a certain or certain performance of welding rod in coating
Inventor has been carried out by many experiments to compositions of surfacing metal the study found that welding rod is comprehensive when the composition of electrode coating is in following range
Performance is closed better than other proportions: 38~41 parts of marble;21~23 parts of fluorite;1.5~2.5 parts of titanium dioxide;Na2CO30.5~
1.5 part;3~5 parts of ferromanganese powder;2~3 parts of ferrosilicon;12~13 parts of ferrotianium;6~8 parts of quartz especially selects 39 parts of marble;Firefly
22 parts of stone;2 parts of titanium dioxide;Na2CO31 part;4 parts of ferromanganese powder;2.5 parts of ferrosilicon;12.5 parts of ferrotianium;When 7 parts of quartz, obtain
The welding rod comprehensive performance arrived is best.
A specific embodiment of the invention is further described below with reference to embodiment, is not therefore limited the present invention
System is among the embodiment described range.
Embodiment 1
One, prepared by welding rod
1, ingredient: only having chosen most representational several groups of experiments in many experiments below, to prove present invention selection
Welding rod coating recipe comprehensive performance it is best.Specific test parameters is as shown in table 1;
Coating component prescription in 1 welding rod of table
2, core wire is handled: with the oxide skin on the core wire surface that emery cloth polishing diameter is 3.2 mild steel H08A of Φ, core wire chemistry
Ingredient is shown in Table 2;
2 H08A core wire chemical component (/wt%) of table
Chemical component | C | Si | Mn | P | S | Ni | Cr |
Core wire H08A | ≤0.10 | ≤0.03 | 0.30~0.55 | ≤0.03 | ≤0.03 | ≤0.30 | ≤0.20 |
3, dry-mixed: each medicinal powder that will be weighed up, which mixes, to be gently mixed until uniformly, it is desirable that there is not allowed that blocky, grain
Shape;
4, wet mixing: being gradually added into appropriate waterglass, be gently mixed with hand, is allowed to uniformly mixed until that can form dough;
5, suppress: the good wet-milling group of wet mixing is put into press and is allowed to along core wire length direction even application, then with pair
Hand rolls core wire gently on a glass, is sticked to coating gradually securely on core wire;The welding rod suppressed is placed 24 hours,
It is allowed to dry;
6, dry: the welding rod that will be dried, put into electrically heated drying cabinet dried at 350 DEG C 2 hours to get.
Two, welding rod presentation quality is examined
Welding rod presentation quality not only directly reflects the comprehensive technical level of welding rod manufacture, also directly affects the usability of welding rod
Energy and welding quality.Eccentricity refers to the offset at welding rod section coating center.The calculation method of eccentricity:
In formula: T1-- welding rod section coating maximum gauge+electrode size (mm);
T2-- welding rod section coating minimum thickness+electrode size (mm);
With the diameter T of vernier caliper measurement welding rod, maximum to be denoted as T1, the smallest to be denoted as T2, specific test data is shown in Table 3
It is shown:
3 welding-rod eccentricity rate of table calculates
It is observed that: 1. the appearance of welding rod is integrally relatively uniform;
2. electrode surface has bubble, when making welding rod it is noted that uniformly covering coating;
3. every electrode is not of uniform size, hand-made to have error;
4. J507 welding rod is the carbon steel of low hydorgew sodium type coating, from the above, it can be seen that its eccentricity is less than 4mm, above-mentioned S1~
S4 group all meets requirement.
Two, microstructure observation tests
1, the performance of welding point and its chemical component, structural state are closely related.The chemical component of welding point is true
After fixed, joint performance is dependent on the structural state of connector.By observing the metallographic structure of welding point, it can determine that welding connects
The tissue characteristics in each region, grain size, generation microscopic defect (lack of penetration, crackle, stomata, slag inclusion).According to metallographic group
The observation result knitted may determine that the structural state of welding line joint is met the requirements, selected welding material, welding procedure, Re Chu
Manage rational technology.
Attached drawing 1 amplifies the organization chart of the Q235 steel base material under 100 multiples, and blocky multi-panel body tissue is as can be seen from Figure 1
Ferrite, black multi-panel body tissue are pearlite, the more uniform mixed distribution of ferrite and pearlite;
Attached drawing 2 is the metallographic structure figure that weld seam amplifies 100 times, occurs more pearlite in weld seam as can be seen from Figure 2,
It is the ferrite of lamella and the bipolar mixture tissue of cementite, synusia spacing is smaller, and C, without saturation degree, is in ferrite
A kind of statenchyma, with favorable comprehensive mechanical property.
Three, hardness test
Hardness test device therefor is HVS-50 number Vickers.Test parameter setting such as the following table 4 institute when hardness
Show.
4 hardometer parameter setting of table
Pressure/kg | Dwell time/s | Amplification factor |
10 | 15 | 20X |
Each sample testing 5 times, due to sample and pressure head have one contact after reach stable process, so each sample
First hardness point ignore, take the average value of rear four hardness numbers as final data.The processing method and weld seam of base material are tried
Sample is identical.
Hardness number is as shown in table 5:
5 hardness number of table (/HV)
As can be seen from Table 5, the hardness of weld seam is substantially in 190HV or so, but the hardness of S1 group welding rod weld seam is average
Value is up to 216.9HV;The hardness of base material is probably in 150HV or so;Weld hardness is greater than base material hardness;It is formulated the hardness of S1 most
Greatly, material resistance flexible deformation, plastic deformation or the ability of destruction are strong after this kind of welding electrode.
Four, measurement is stretched
1, tensile sample is intercepted from welding point perpendicular to weld line direction, and the reinforcement of specimen surface weld seam is beaten with grinding wheel
It grinds off and removes, be allowed to concordant with base material.Without transverse direction tool marks and scratch in the tested length of sample.The shape of tensile sample such as Fig. 3
Shown in (main view) and Fig. 4 (left view).
When sample thickness is greater than 2mm, b value 25mm, i.e. head width are 37mm, total length L value 100mm.
Tension test carries out on universal testing machine, removes weld seam tension test, while one section of base material being taken to stretch.
2, test result
6 maximum tensile stress value of table
The tensile stress of J507 welding rod probably arrives 580MPa or so 490, as can be seen from Table 6, the maximum value of welding rod S1
(tensile stress) is 598.13MPa, and the tensile property of the formula welding rod is best.
In summary, the presentation quality of welding rod S1 of the present invention is qualified, and metallographic structure is excellent, Vickers hardness and tensile strength
Height, comprehensive performance is best, fully meets comprehensive performance requirement of the modern welding procedure to welding rod.
Claims (3)
1. a kind of preparation method of J507 welding rod, the J507 welding rod is by core wire and the coating two parts group being attached on core wire
At, which is characterized in that H08A is made of as core wire, the coating following parts by weight ingredient:
CaCO in the marble3Content > 97wt%, P content < 0.037wt%, S content < 0.037wt%;
CaF in the fluorite2Content > 90wt%, granularity are 120 mesh;
Silicon in Ferrosilicon content >=75%, granularity are 80 mesh;
The titanium dioxide is anatase titanium dioxide, wherein TiO2Content >=91.0wt%;
The ferromanganese powder is low Carbon Manganese iron powder FeMn84C0.4, wherein C content≤0.4wt%, P are 0.15~0.3wt%, S <
0.002wt%, granularity are 100 mesh;
The quartz granularity is 200 mesh, wherein silicon content >=99.7wt%, 80~100ppm of iron-content, moisture≤0.05wt%;
The ferrotianium selects FeTi30-A type, and wherein Ti content is 25~35wt%, and Al content 8wt%, Mn content is
2.5wt%;
The preparation method of the J507 welding rod the following steps are included:
A, it ingredient: is weighed according to ingredient each in coating, for use;
B, core wire prepares: core wire surface being polished, removes surface scale, for use;
C, dry-mixed: the load weighted compositions of surfacing metal of a step is mixed;
D, wet mixing: being added binder in the material after step c is mixed, stirs, and mixes, obtains wet-milling group;
E, it suppresses: the wet-milling group that Step d obtains being put into press along the uniform pressure dressing of core wire length direction, wet-milling group is pasted
On core wire, dry 24 hours;
F, dry: the welding rod that step e is dried, at 250~350 DEG C dry 1.5~2.5h to get;
Binder described in Step d is made after being mixed by the waterglass of 45 Baume degrees, modulus M=2.9 with 5wt% methyl acrylate
It is standby to form.
2. a kind of preparation method of J507 welding rod according to claim 1, it is characterised in that: the diameter of core wire is in b step
3.2mm。
3. a kind of preparation method of J507 welding rod according to claim 1, it is characterised in that: welding rod is at 350 DEG C in f step
Dry 2h.
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