CN102974958B - 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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- CN102974958B CN102974958B CN201210481004.7A CN201210481004A CN102974958B CN 102974958 B CN102974958 B CN 102974958B CN 201210481004 A CN201210481004 A CN 201210481004A CN 102974958 B CN102974958 B CN 102974958B
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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 the supporting welding rod of steel for a kind of hot-galvanized cauldron.
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.There are at present two kinds of iron zinc pot and ceramic zinc boilers, 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, at zinc-plated temperature, easily deforms, and service life is shorter, the external hot-galvanized cauldron that conventionally adopts this pure iron material to manufacture.More than domestic hot-galvanized cauldron, be to adopt the thick high-quality low carbon low silicon steel plate of 35 ~ 60mm to be welded, typical galvanized pot is as represented in table 1 by steel main chemical compositions:
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 zinc pot is 430 ~ 450 ℃, because the zinc liquid of melting has strong corrosivity to ferrous materials, make the service life of galvanized pot very short, it is mainly the process that carbon in steel and silicon have promoted corrosion, when particularly in steel matrix or weld seam, silicone content is higher, due to Sandelin effect, iron zinc reaction speed is accelerated, and causes zinc pot to be worn by erosion and to scrap very soon.
Existing galvanizing equipment producer is mainly used weld metal silicone content in the welding of the J422 of 0.09% left and right welding rod, causes service life of equipment to shorten, and the feature according to hot-galvanized cauldron with steel, need to develop the welding rod matching that weld metal silicone content is lower.
Summary of the invention
In order to address the above problem, the invention provides a kind of and hot-galvanized cauldron supporting welding rod of steel.
The supporting welding rod of steel for hot-galvanized cauldron, comprises steel core and coating, and compositions of surfacing metal is calculated as by quality percentage composition: CaCO
3: 15 ~ 25%, CaF
2: 35 ~ 45%, TiO
2: 18 ~ 22%, Na
2cO
3: 1%, Ti-Fe:8 ~ 10%, surplus is iron powder.
The present invention adopts CaO-CaF
2-TiO
2type 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 weld seam, in coating, do not add siliceous raw material.The combination of each raw material and proportioning in 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 is not enough, and proportioning is when large, the defect 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 mobility of slag, can reduce the gaseous impurity in weld metal, have certain dehydrogenation effect, when its content in coating is few, dehydrogenation scarce capacity, the excessive slag that can cause again of content is excessively rare.TiO
2in electrode coating, mainly play fluxing effect, can improve the mobility of slag, promote the gathering of weld metal reduzate also they to be rejected in slag.TiO
2different can the having a significant impact the macrostructure of slag of content, when its proportioning hour in coating, slag fluidity is bad, moulding variation; When proportioning is large, de-slag difficulty.Ti-Fe(ferrotianium) be the quality percentage composition of the titanium ferrotianium in 20.0% ~ 75.0% scope.
Preferably, coating accounts for 40% of welding rod gross weight, to guarantee that welding rod has good welding procedure within the scope of above-mentioned compositions of surfacing metal.
Preferably, in Ti-Fe, the quality percentage composition of Ti is 27 ~ 30%, 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 H08A steel wire, and in welding wire, silicone content is less than 0.03%, and carbon content is less than 0.08%.Welding rod is of a great variety with steel, and the steel core material of conventional welding rod also can make C and the Si constituent content in weld seam increase, and therefore need to by the feature of steel, select for hot-galvanized cauldron, to guarantee in weld seam that C and Si can not exceed standard.
Preferably, compositions of surfacing metal is calculated as by 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 in weld seam and silicone content lower than mother metal, can meet the welding requirements of steel for hot-galvanized cauldron, and welding technological properties and good mechanical properties, its liquid zinc corrosion resistant performance, deposited metal composition and deposited metal mechanical property all can meet the welding requirements of steel for hot-galvanized cauldron.By in welding on steel for hot-galvanized cauldron, welding rod welding technological properties of the present invention is good, and arc stability, de-slag is easy, moulding is attractive in appearance.
The specific embodiment
Below in conjunction with specific embodiment, the invention will be further described, can be implemented, but illustrated embodiment is not as a limitation of the invention so that those skilled in the art can better understand the present invention also.
Embodiment 1
The supporting welding rod of steel for a kind of hot-galvanized cauldron.This welding rod is comprised of welding rod steel core and coating, welding rod steel core is H08A steel wire, with waterglass, as binding agent, adopts existing welding rod production equipment and process method preparation, coating accounts for 40% of welding rod gross weight, and wherein 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
The supporting welding rod of steel for a kind of hot-galvanized cauldron.This welding rod is comprised of welding rod steel core and coating, welding rod steel core is H08A steel wire, with waterglass, as binding agent, adopts existing welding rod production equipment and process method preparation, coating accounts for 40% of welding rod gross weight, and wherein 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
The supporting welding rod of steel for a kind of hot-galvanized cauldron.This welding rod is comprised of welding rod steel core and coating, welding rod steel core is H08A steel wire, with waterglass, as binding agent, adopts existing welding rod production equipment and process method preparation, coating accounts for 40% of welding rod gross weight, is wherein that 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 in Ti-Fe, the quality percentage composition of Ti is 27 ~ 30%.
Embodiment 4
Welding rod to embodiment 1 ~ 3 preparation carries out deposited metal composition and mechanical property analysis, and the value recording uses respectively actual value 1 ~ 3 to represent.
The deposited metal composition of welding rod is in 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 within the scope of the guarantee value of table 2.
The deposited metal mechanical property of welding rod and liquid zinc corrosion resistant performance are in 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 within the scope of the guarantee value of table 3.
The above embodiment is only the preferred embodiment for absolutely proving 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. the supporting welding rod of steel for hot-galvanized cauldron, comprises steel core and coating, it is characterized in that, compositions of surfacing metal is calculated as by 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 is iron powder.
2. the supporting welding rod of steel for hot-galvanized cauldron according to claim 1, is characterized in that, coating accounts for 40% of welding rod gross weight.
3. the supporting welding rod of steel for hot-galvanized cauldron according to claim 1, is characterized in that, in described Ti-Fe, the quality percentage composition of Ti is 27 ~ 30%.
4. the supporting welding rod of steel for hot-galvanized cauldron according to claim 1, is characterized in that, described steel core and coating chien shih use waterglass as binding agent.
5. the supporting welding rod of steel for hot-galvanized cauldron according to claim 1, is characterized in that, described steel core adopts H08A steel wire.
6. the supporting welding rod of steel for hot-galvanized cauldron according to claim 1, is characterized in that, compositions of surfacing metal is calculated as by 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 |
Applications Claiming Priority (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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102974958A CN102974958A (en) | 2013-03-20 |
| CN102974958B true CN102974958B (en) | 2014-11-05 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103659041B (en) * | 2013-12-27 | 2015-12-30 | 武汉铁锚焊接材料股份有限公司 | The supporting welding rod of a kind of midium-carbon steel SA517 |
| 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 |
| 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 |
| 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 |
| 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 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1010393B (en) * | 1985-10-24 | 1990-11-14 | 张奎元 | Special welding rod for aluminium-coated steel |
| JPS62292298A (en) * | 1986-06-12 | 1987-12-18 | Kawasaki Steel Corp | Coated electrode for fillet welding having excellent crack resistance |
| CN87102782B (en) * | 1987-04-16 | 1988-08-31 | 冶金工业部钢铁研究总院 | Ultralow hydrogen type welding rod |
| CN1221663A (en) * | 1998-12-21 | 1999-07-07 | 赵志显 | Welding rod prescription material cap able to weld high strength steel and its mfg. method |
| CN1113726C (en) * | 1999-02-04 | 2003-07-09 | 魏国章 | Electric welding electrode of refractory pearlitic steel |
| CN100500363C (en) * | 2006-10-26 | 2009-06-17 | 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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