CN102974958A - Welding rod matched with steel for hot galvanizing pot - Google Patents
Welding rod matched with steel for hot galvanizing pot Download PDFInfo
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- CN102974958A CN102974958A CN2012104810047A CN201210481004A CN102974958A CN 102974958 A CN102974958 A CN 102974958A CN 2012104810047 A CN2012104810047 A CN 2012104810047A CN 201210481004 A CN201210481004 A CN 201210481004A CN 102974958 A CN102974958 A CN 102974958A
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- hot galvanizing
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Abstract
The invention discloses a welding rod matched with steel for a hot galvanizing pot and belongs to the technical field of a welding material. The welding rod comprises a steel core and a cover, wherein the cover comprises the following components by mass percent: 15-25% of CaCO3, 35-45% of CaF2, 18-22% of TiO2, 0.5-1% of Na2CO3, 8-10% of Ti-Fe, and the balance of iron powder. The welding rod provided by the invention can meet the welding demand of the steel for the hot galvanizing pot; the welding processing property and the mechanical property are excellent; and the galvanizing zinc corrosion resistance, the deposited metal chemical component and the deposited metal mechanical property of the welding rod all can meet the welding demand of the steel for the hot galvanizing pot.
Description
Technical field
The present invention relates to a kind of welding material, be specifically related to a kind of hot-galvanized cauldron supporting welding rod of steel.
Background technology
At present, Hot Galvanizing Technology has become the most basic, the most economical effective method of ferrous materials anticorrosion aspect application.In hot galvanizing process, galvanized pot is to consume very large equipment.Two kinds of iron zinc pot and ceramic zinc boilers are arranged at present, although few life-span of ceramic zinc boiler cadmia is long, because of expensive less being used of its equipment manufacturing cost.Iron zinc pot requires Zinc-corrosion resistant, thus must make of carbon containing and the few pure iron of silicon, but pure iron intensity is lower, easily deforms under zinc-plated temperature, and service life is shorter, the external hot-galvanized cauldron that usually adopts this pure iron material to make.Be to adopt the thick high-quality low carbon low silicon steel plate of 35 ~ 60mm to be welded more than the domestic hot-galvanized cauldron, typical galvanized pot is represented with steel main chemical compositions such as table 1:
Table 1(mass fraction %)
| C | Si | Mn | S | P | Cu | Cr | Ni | Fe |
| 0.07 | 0.15 | 0.32 | 0.01 | 0.012 | 0.13 | 0.03 | 0.07 | Surplus |
Zinc liquid temperature in the zinc pot is 430 ~ 450 ℃, because the zinc liquid of melting has strong corrosivity to ferrous materials, so that the service life of galvanized pot is very short, it mainly is the process that carbon in the steel and silicon have promoted corrosion, particularly when silicone content is higher in steel matrix or the weld seam, because the Sandelin effect, iron zinc reaction speed is accelerated, and causes the zinc pot to be worn by erosion very soon and scraps.
Existing galvanizing equipment producer mainly uses the J422 welding rod welding of weld metal silicone content about 0.09%, causes service life of equipment to shorten, and according to the characteristics of hot-galvanized cauldron with steel, needs the lower welding rod that matches of development weld metal silicone content.
Summary of the invention
In order to address the above problem, the invention provides a kind of and the hot-galvanized cauldron supporting welding rod of steel.
A kind of hot-galvanized cauldron comprises steel core and coating with the supporting welding rod of steel, and compositions of surfacing metal is calculated as by the quality percentage composition: CaCO
3: 15 ~ 25%, CaF
2: 35 ~ 45%, TiO
2: 18 ~ 22%, Na
2CO
3: 1%, Ti-Fe:8 ~ 10%, surplus are iron powder.
The present invention adopts CaO-CaF
2-TiO
2The type basic slag system.Basic clinker can effectively reduce the non-metallic inclusion of weld metal and have desulfidation, can significantly improve the toughness of weld metal.
In order to control the silicone content in the weld seam, do not add siliceous raw material in the coating.The combination of each raw material and proportioning in the above compositions of surfacing metal all grope to draw through lot of experiments.CaCO
3Main Function be gas making and slag making in welding process, if proportioning is little gas making not enough, and proportioning is when large, the defective such as can cause again slag to glue, splash to increase and moulding is bad.CaF
2It is the important source material of hydrogen controlled electrode, Main Function is slag making, in basic slag, can reduce fusing point, viscosity and the surface tension of slag, increase the flowability of slag, can reduce the gaseous impurity in the weld metal, certain dehydrogenation effect is arranged, when its content in coating is few, the dehydrogenation scarce capacity, the excessive slag that can cause again of content is excessively rare.TiO
2Mainly in electrode coating play fluxing effect, can improve the flowability of slag, promote the gathering of weld metal reduzate and they are rejected in the slag.TiO
2Different can the macrostructures of slag being had a significant impact of content, when its proportioning hour in coating, slag fluidity is bad, the moulding variation; When proportioning is large, take off the slag difficulty.The Ti-Fe(ferrotianium) is the ferrotianium of quality percentage composition in 20.0% ~ 75.0% scope of titanium.
Preferably, coating accounts for 40% of welding rod gross weight, to guarantee that welding rod has good welding procedure in above-mentioned compositions of surfacing metal scope.
Preferably, the quality percentage composition of Ti is 27 ~ 30% among the Ti-Fe, mainly plays deoxidation, if proportioning is little, deoxidation is not enough; When proportioning is large, worsen toughness.
Preferably, described steel core and coating chien shih use waterglass as binding agent.Described waterglass is the aqueous solution of sodium metasilicate.
Preferably, described steel core adopts the H08A steel wire, and silicone content is less than 0.03% in the welding wire, and carbon content is less than 0.08%.Welding rod is various with the steel grade class, and the steel core material of welding rod commonly used also can make C and the Si constituent content in the weld seam increase, and therefore need to select with the characteristics of steel for hot-galvanized cauldron, can not exceed standard with C and Si in the assurance weld seam.
Preferably, compositions of surfacing metal is calculated as by the quality percentage composition: CaCO
3: 20%, CaF
2: 38%, TiO
2: 20%, Na
2CO
3: 1%, Ti-Fe:9%, iron powder: 12%.
The present invention has following beneficial effect:
The electrode coating composition proportion that the present invention adopts makes carbon and silicone content in the weld seam be lower than mother metal, can satisfy the hot-galvanized cauldron welding requirements of steel, and welding technological properties and good mechanical properties, its liquid zinc corrosion resistant performance, deposited metal composition and deposited metal mechanical property all can satisfy the welding requirements that hot-galvanized cauldron is used steel.By welding with steel at hot-galvanized cauldron, welding rod welding technological properties of the present invention is good, arc stability, takes off that slag is easy, moulding is attractive in appearance.
The specific embodiment
The invention will be further described below in conjunction with specific embodiment, can be implemented so that those skilled in the art can better understand the present invention also, but illustrated embodiment is not as a limitation of the invention.
Embodiment 1
A kind of hot-galvanized cauldron supporting welding rod of steel.This welding rod is comprised of welding rod steel core and coating, the welding rod steel core is the H08A steel wire, as binding agent, adopts existing welding rod production equipment and process method preparation with waterglass, coating accounts for 40% of welding rod gross weight, and wherein the covering of an electrode composition is by weight percentage: CaCO
3: 15%, CaF
2: 45%, TiO
2: 18%, Na
2CO
3: 0.5%, Ti-Fe:8%, all the other are iron powder.
Embodiment 2
A kind of hot-galvanized cauldron supporting welding rod of steel.This welding rod is comprised of welding rod steel core and coating, the welding rod steel core is the H08A steel wire, as binding agent, adopts existing welding rod production equipment and process method preparation with waterglass, coating accounts for 40% of welding rod gross weight, and wherein the covering of an electrode composition is by weight percentage: CaCO
3: 25%, CaF
2: 35%, TiO
2: 22%, Na
2CO
3: 1%, Ti-Fe:10%, all the other are iron powder.
Embodiment 3
A kind of hot-galvanized cauldron supporting welding rod of steel.This welding rod is comprised of welding rod steel core and coating, the welding rod steel core is the H08A steel wire, as binding agent, adopts existing welding rod production equipment and process method preparation with waterglass, coating accounts for 40% of welding rod gross weight, wherein is that the covering of an electrode composition is by weight percentage: CaCO
3: 20%, CaF
2: 38%, TiO
2: 20%, Na
2CO
3: 1%, Ti-Fe:9%, all the other are iron powder, wherein the quality percentage composition of Ti is 27 ~ 30% among the Ti-Fe.
Embodiment 4
Welding rod to embodiment 1 ~ 3 preparation carries out deposited metal composition and mechanical property analysis, and the value that records is used respectively actual value 1 ~ 3 expression.
The deposited metal composition of welding rod sees Table 2.
Table 2 deposited metal composition (%)
| ? | C | Si | Mn | S | P |
| Guarantee value | ≤0.07 | ≤0.05 | ≤1.0 | ≤0.030 | ≤0.030 |
| Actual value 1 | 0.045 | 0.038 | 0.5 | 0.02 | 0.023 |
| Actual value 2 | 0.047 | 0.04 | 0.47 | 0.017 | 0.025 |
| Actual value 3 | 0.039 | 0.035 | 0.55 | 0.018 | 0.019 |
Through repeatedly actual detection, adopt welding rod of the present invention, the actual value of its deposited metal composition is all in the guarantee value scope of table 2.
Deposited metal mechanical property and the liquid zinc corrosion resistant performance of welding rod see Table 3.
Table 3 deposited metal mechanical property
| ? | Tensile strength Rm MPa | Lower yield strength ReLMPa | Percentage elongation A% | Akv(J) 0℃ | Liquid zinc corrosion resistant performance hanging film scene 90 days |
| Guarantee value | ≥350 | ≥260 | ≥22 | ≥47 | The weld corrosion degree of depth is less than mother metal |
| Actual value 1 | 400 | 360 | 28 | 202 210 211 | Than the little 9mm of mother metal |
| Actual value 2 | 430 | 315 | 26 | 190 230 192 | Than the little 9.32mm of mother metal |
| Actual value 3 | 410 | 330 | 26 | 200 210 198 | Than the little 9.12mm of mother metal |
Through repeatedly actual detection, adopt welding rod of the present invention, the actual value of its deposited metal mechanical property and liquid zinc corrosion resistant performance is all in the guarantee value scope of table 3.
The above embodiment is the preferred embodiment that proves absolutely that the present invention lifts, and protection scope of the present invention is not limited to this.Being equal to that those skilled in the art do on basis of the present invention substitutes or conversion, all within protection scope of the present invention.Protection scope of the present invention is as the criterion with claims.
Claims (6)
1. a hot-galvanized cauldron comprises steel core and coating with the supporting welding rod of steel, it is characterized in that compositions of surfacing metal is calculated as by the quality percentage composition: CaCO
3: 15 ~ 25%, CaF
2: 35 ~ 45%, TiO
2: 18 ~ 22%, Na
2CO
3: 0.5 ~ 1%, Ti-Fe:8 ~ 10%, surplus are iron powder.
2. hot-galvanized cauldron according to claim 1 is characterized in that with the supporting welding rod of steel coating accounts for 40% of welding rod gross weight.
3. hot-galvanized cauldron according to claim 1 is characterized in that with the supporting welding rod of steel the quality percentage composition of Ti is 27 ~ 30% among the described Ti-Fe.
4. hot-galvanized cauldron according to claim 1 is characterized in that with the supporting welding rod of steel, and described steel core and coating chien shih use waterglass as binding agent.
5. hot-galvanized cauldron according to claim 1 is characterized in that with the supporting welding rod of steel, and described steel core adopts the H08A steel wire.
6. hot-galvanized cauldron according to claim 1 is characterized in that with the supporting welding rod of steel compositions of surfacing metal is calculated as by the quality percentage composition: CaCO
3: 20%, CaF
2: 38%, TiO
2: 20%, Na
2CO
3: 1%, Ti-Fe:9%, iron powder: 12%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210481004.7A CN102974958B (en) | 2012-11-23 | 2012-11-23 | Welding rod matched with steel for hot galvanizing pot |
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|---|---|---|---|
| CN201210481004.7A CN102974958B (en) | 2012-11-23 | 2012-11-23 | Welding rod matched with steel for hot galvanizing pot |
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|---|---|
| CN102974958A true CN102974958A (en) | 2013-03-20 |
| CN102974958B CN102974958B (en) | 2014-11-05 |
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|---|---|---|---|
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103659041A (en) * | 2013-12-27 | 2014-03-26 | 武汉铁锚焊接材料股份有限公司 | Welding rod matched with steel SA517 for nuclear power |
| CN104708228A (en) * | 2015-02-12 | 2015-06-17 | 西安理工大学 | General type self-protection powder core soldering flux and preparation method thereof |
| CN106425170A (en) * | 2016-12-06 | 2017-02-22 | 攀枝花学院 | Low-hydrogen type iron-powder electrode and preparation method thereof |
| CN106624444A (en) * | 2016-12-06 | 2017-05-10 | 攀枝花学院 | High-deposition-rate and low-hydrogen type iron powder electrode and preparation method thereof |
| CN109773372A (en) * | 2019-03-04 | 2019-05-21 | 辽宁工程技术大学 | A kind of manual electric arc welding coating of build-up welding bar formula and welding rod preparation method |
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| CN1262160A (en) * | 1999-02-04 | 2000-08-09 | 魏国章 | Electric welding electrode of refractory pearlitic steel |
| CN101168219A (en) * | 2006-10-26 | 2008-04-30 | 中国船舶重工集团公司第七二五研究所 | Method for preparing low hydrogen type downwards electrode |
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2012
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Patent Citations (6)
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|---|---|---|---|---|
| CN85107971A (en) * | 1985-10-24 | 1987-05-06 | 张奎元 | The special welding rod of aluminium-coated steel |
| JPS62292298A (en) * | 1986-06-12 | 1987-12-18 | Kawasaki Steel Corp | Coated electrode for fillet welding having excellent crack resistance |
| CN87102782A (en) * | 1987-04-16 | 1988-12-14 | 治金工业部钢铁研究总院 | Ultralow hydrogen type welding rod |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103659041A (en) * | 2013-12-27 | 2014-03-26 | 武汉铁锚焊接材料股份有限公司 | Welding rod matched with steel SA517 for nuclear power |
| CN104708228A (en) * | 2015-02-12 | 2015-06-17 | 西安理工大学 | General type self-protection powder core soldering flux and preparation method thereof |
| CN104708228B (en) * | 2015-02-12 | 2017-03-15 | 西安理工大学 | A kind of universal self-shield fluxed-cored welding agent and preparation method thereof |
| CN106425170A (en) * | 2016-12-06 | 2017-02-22 | 攀枝花学院 | Low-hydrogen type iron-powder electrode and preparation method thereof |
| CN106624444A (en) * | 2016-12-06 | 2017-05-10 | 攀枝花学院 | High-deposition-rate and low-hydrogen type iron powder electrode and preparation method thereof |
| CN106624444B (en) * | 2016-12-06 | 2019-02-22 | 攀枝花学院 | High deposition rate low hydrogen type iron powder electrode and preparation method thereof |
| CN106425170B (en) * | 2016-12-06 | 2019-03-19 | 攀枝花学院 | A kind of low hydrogen type iron powder electrode and preparation method thereof |
| CN109773372A (en) * | 2019-03-04 | 2019-05-21 | 辽宁工程技术大学 | A kind of manual electric arc welding coating of build-up welding bar formula and welding rod preparation method |
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|---|---|
| CN102974958B (en) | 2014-11-05 |
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