CN100446911C - Welding rod for bridge steel - Google Patents
Welding rod for bridge steel Download PDFInfo
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- CN100446911C CN100446911C CNB2006100199222A CN200610019922A CN100446911C CN 100446911 C CN100446911 C CN 100446911C CN B2006100199222 A CNB2006100199222 A CN B2006100199222A CN 200610019922 A CN200610019922 A CN 200610019922A CN 100446911 C CN100446911 C CN 100446911C
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- welding rod
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- bridge steel
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Abstract
A welding electrode for bridge steel Q420q is prepared from H08GX steel wire as core, water glass as adhesive and surface flux layer containing proportionally CaCO3, CaF2, TiO2, SiO2, Mn, Ti-Fe, Si-Fe, RE-Mg, B-Fe, Mo-Fe and Fe.
Description
Technical field:
The present invention relates to welding material, more specifically relate to the welding material of steel.
Background technology:
Welding material is the common name of welding time institute's consumable material, and it comprises welding rod, welding wire, solder flux and gas etc.And in welding material, the shared ratio of welding rod is 50%～60%, and therefore, welding rod is a kind of important welding material.
Enter the nineties, economic development is growing to the demand of transport development, the construction of freeway net and stride the construction of rivers, gulf over strait passage, and LARGE SPAN STEEL BRIDGE is built in an urgent demand.China's steel bridge construction is full weldering bridge from bolt weldering bridge transition gradually, and the design of combined bridge is open to traffic speed per hour also in raising gradually.As the design speed per hour that is open to traffic is Nanjing all the people present's Yangtze Bridge of 300KM/H, and employed steel are the bridge steel Q420q of China a new generation.
According to the welding rod that chemical composition of steel, mechanical property, cracking resistance etc. require needs to select for use to be complementary with it, Q420q is a new steel grade, at present the welding rod that does not match with it.
Summary of the invention:
The object of the present invention is to provide a kind of welding rod for bridge steel, the deposited metal composition of this welding rod and deposited metal mechanical property can satisfy the welding requirements of bridge steel Q420q, are a kind of welding rods that is complementary with bridge steel Q420q.
In order to achieve the above object, the present invention adopts following technical scheme:
A kind of welding rod for bridge steel is made up of welding rod steel core and coating, and the welding rod steel core adopts the H08GX steel wire, as binding agent, adopts existing welding rod production equipment and process preparation with waterglass, it is characterized in that the covering of an electrode composition is by weight percentage:
CaCO
3: 40～50, CaF
2: 13～25, TiO
2: 2～5, SiO
2: 2～5, Mn:3～6, Ti-Fe:2～4, Si-Fe:4～7, rare earth magnesium: 1.5, B-Fe:0.1～0.3, Mo-Fe:1～1.6, all the other are iron powder.
The present invention adopts CaO-CaF
2-SiO
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 the electrode coating each material select for use and proportioning is the key of decision welding rod welding technological properties and mechanical property, must have suitable theoretical level and actual tests, by a large amount of verification experimental verifications.CaCO in compositions of surfacing metal
3Proportioning hour, the gas making deficiency worsens toughness; When proportioning is big, slag glue, splash increase and moulding bad.CaF
2Proportioning hour, the dehydrogenation scarce capacity; When proportioning was big, slag was rare excessively.SiO
2With TiO
2Play fluxing effect, proportioning hour, slag fluidity is bad, the moulding variation; When proportioning is big, take off the slag difficulty.Mn proportioning hour, insufficient strength; When proportioning was big, weld seam crystal grain in the postwelding cooling procedure was thick, worsened toughness.For this reason, by a large amount of theories and experimental study, with CaCO
3, CaF
2, SiO
2With TiO
2Be formulated to a desirable scope, guaranteed that the good welding technological properties of welding rod reaches the generation that effectively prevents weld defect.Ti-Fe mainly plays deoxidation, has cooperated with B-Fe and has strengthened the low-temperature impact toughness that the toughness effect improves weld seam.The adding of rare earth can obtain the effect of sulphur removal, phosphorus and crystal grain thinning, and can improve the toughness of weld seam.Mo-Fe works to improve weld strength.
Characteristics of the present invention are: the electrode coating composition proportion that is adopted, can bring into play the advantage of forming the various compositions of coating to greatest extent, suppress its shortcoming to greatest extent, can make deposited metal composition and deposited metal mechanical property can satisfy the welding requirements of bridge steel Q420q, be a kind of welding rod that is complementary with bridge steel Q420q.
By welding on the Q420q steel, welding rod welding technological properties of the present invention is good, arc stability, takes off that slag is easy, moulding is attractive in appearance.
Deposited metal composition and mechanical property meet the requirement of GB/T5118-1995 " low-alloy steel electrode ".
The deposited metal composition of welding rod sees Table 1.
Table 1 deposited metal composition (%)
| C | Si | Mn | S | P | Mo | |
| Guarantee value | ≤0.10 | ≤0.6 | 1.0～1.6 | ≤0.015 | ≤0.020 | 0.1～0.4 |
| Actual value 1 | 0.042 | 0.38 | 1.41 | 0.010 | 0.016 | 0.25 |
| Actual value 2 | 0.047 | 0.44 | 1.19 | 0.0050 | 0.013 | 0.35 |
| Actual value 3 | 0.041 | 0.37 | 1.40 | 0.0028 | 0.014 | 0.24 |
Through actual detected repeatedly, adopt welding rod of the present invention, the actual value of its deposited metal composition is all in the guarantee value scope of table 1.
The deposited metal mechanical property of welding rod sees Table 2.
Table 2 deposited metal mechanical property
| Tensile strength Rm MPa | Lower yield strength ReL MPa | Percentage elongation A% | Akv(J) -40℃ | |
| Guarantee value | ≥590 | ≥490 | ≥17 | ≥47 |
| Actual value 1 | 645 | 560 | 28 | 83 92 83 |
| Actual value 2 | 640 | 575 | 25 | 136 138 142 |
| Actual value 3 | 640 | 545 | 24.5 | 109 140 136 |
Through actual detected repeatedly, adopt welding rod of the present invention, the actual value of its deposited metal mechanical property is all in the guarantee value scope of table 2.
The specific embodiment:
Embodiment 1:
A kind of welding rod for bridge steel is made up of welding rod steel core and coating, and the welding rod steel core adopts the H08GX steel wire, as binding agent, adopts existing welding rod production equipment and process preparation with waterglass, it is characterized in that the covering of an electrode composition is by weight percentage:
CaCO
3: 48, CaF
2: 19, TiO
2: 2, SiO
2: 5, Mn:3.5, Ti-Fe:3, Si-Fe:6, rare earth magnesium: 1.5, B-Fe:0.2, Mo-Fe:1.1, iron powder: 10.7.
Embodiment 2:
A kind of welding rod for bridge steel is made up of welding rod steel core and coating, and the welding rod steel core adopts the H08GX steel wire, as binding agent, adopts existing welding rod production equipment and process preparation with waterglass, it is characterized in that the covering of an electrode composition is by weight percentage:
CaCO
3: 42, CaF
2: 25, TiO
2: 3, SiO
2: 4, Mn:4, Ti-Fe:4, Si-Fe:4.5, rare earth magnesium: 1.5, B-Fe:0.1, Mo-Fe:1.2, iron powder: 10.7.
Embodiment 3:
A kind of welding rod for bridge steel is made up of welding rod steel core and coating, and the welding rod steel core adopts the H08GX steel wire, as binding agent, adopts existing welding rod production equipment and process preparation with waterglass, it is characterized in that the covering of an electrode composition is by weight percentage:
CaCO
3: 42, CaF
2: 23, TiO
2: 4, SiO
2: 3, Mn:5, Ti-Fe:2, Si-Fe:5, rare earth magnesium: 1.5, B-Fe:0.2, Mo-Fe:1.5, iron powder: 12.8.
Claims (4)
1, a kind of welding rod for bridge steel is made up of welding rod steel core and coating, and the welding rod steel core adopts the H08GX steel wire, as binding agent, it is characterized in that the percentage by weight of this electrode coating composition is with waterglass:
CaCO
3: 40～50, CaF
2: 13～25, TiO
2: 2～5, SiO
2: 2～5, Mn:3～6, Ti-Fe:2～4, Si-Fe:4～7, rare earth magnesium: 1.5, B-Fe:0.1～0.3, Mo-Fe:1～1.6, all the other are iron powder.
2, a kind of welding rod for bridge steel according to claim 1 is characterized in that, the percentage by weight of described electrode coating composition is:
CaCO
3: 48, CaF
2: 19, TiO
2: 2, SiO
2: 5, Mn:3.5, Ti-Fe:3, Si-Fe:6, rare earth magnesium: 1.5, B-Fe:0.2, Mo-Fe:1.1, iron powder 10.7.
3, a kind of welding rod for bridge steel according to claim 1 is characterized in that, the percentage by weight of described electrode coating composition is:
CaCO
3: 42, CaF
2: 25, TiO
2: 3, SiO
2: 4, Mn:4, Ti-Fe:4, Si-Fe:4.5, rare earth magnesium: 1.5, B-Fe:0.1, Mo-Fe:1.2, iron powder 10.7.
4, a kind of welding rod for bridge steel according to claim 1 is characterized in that, the percentage by weight of described electrode coating composition is:
CaCO
3: 42, CaF
2: 23, TiO
2: 4, SiO
2: 3, Mn:5, Ti-Fe:2, Si-Fe:5, rare earth magnesium: 1.5, B-Fe:0.2, Mo-Fe:1.5, iron powder 12.8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100199222A CN100446911C (en) | 2006-08-07 | 2006-08-07 | Welding rod for bridge steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100199222A CN100446911C (en) | 2006-08-07 | 2006-08-07 | Welding rod for bridge steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1903497A CN1903497A (en) | 2007-01-31 |
| CN100446911C true CN100446911C (en) | 2008-12-31 |
Family
ID=37672938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100199222A Expired - Fee Related CN100446911C (en) | 2006-08-07 | 2006-08-07 | Welding rod for bridge steel |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102069319B (en) * | 2010-12-24 | 2013-01-30 | 武汉铁锚焊接材料股份有限公司 | Welding rod matched with steel used for containment of nuclear power plant |
| CN103551760B (en) * | 2013-11-01 | 2015-12-30 | 四川大西洋焊接材料股份有限公司 | A kind of nuclear power carbon steel welding carbon steel and preparation method |
| 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 |
| CN105290645B (en) * | 2015-10-30 | 2018-03-16 | 武汉铁锚焊接材料股份有限公司 | A kind of welding rod for high-strength steel welding and its preparation method and application |
| CN105665958B (en) * | 2016-03-18 | 2018-10-16 | 武汉铁锚焊接材料股份有限公司 | A kind of welding rod mating suitable for 690MPa grades of rack steels of ocean platform |
| CN110977240A (en) * | 2019-11-18 | 2020-04-10 | 天津大桥焊材集团有限公司 | Welding rod special for 80 kg-grade weathering steel and production method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85107972A (en) * | 1985-10-24 | 1987-05-06 | 张奎元 | The welding rod for aluminium coated steel of coat removed from groove |
| CN87102782B (en) * | 1987-04-16 | 1988-08-31 | 冶金工业部钢铁研究总院 | Ultralow hydrogen type welding rod |
| US5155333A (en) * | 1990-07-24 | 1992-10-13 | Kabushiki Kaisha Kobe Seiko Sho | Low hydrogen type coated electrode |
| JPH05111791A (en) * | 1991-10-21 | 1993-05-07 | Nippon Steel Corp | Low hydrogen coated arc welding electrode |
| JPH05293690A (en) * | 1992-04-16 | 1993-11-09 | Kobe Steel Ltd | Low-hydrogen type coated electrode for weather resistant steel |
-
2006
- 2006-08-07 CN CNB2006100199222A patent/CN100446911C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85107972A (en) * | 1985-10-24 | 1987-05-06 | 张奎元 | The welding rod for aluminium coated steel of coat removed from groove |
| CN87102782B (en) * | 1987-04-16 | 1988-08-31 | 冶金工业部钢铁研究总院 | Ultralow hydrogen type welding rod |
| US5155333A (en) * | 1990-07-24 | 1992-10-13 | Kabushiki Kaisha Kobe Seiko Sho | Low hydrogen type coated electrode |
| JPH05111791A (en) * | 1991-10-21 | 1993-05-07 | Nippon Steel Corp | Low hydrogen coated arc welding electrode |
| JPH05293690A (en) * | 1992-04-16 | 1993-11-09 | Kobe Steel Ltd | Low-hydrogen type coated electrode for weather resistant steel |
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|---|---|
| CN1903497A (en) | 2007-01-31 |
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Granted publication date: 20081231 Termination date: 20110807 |