CN100460137C - Low-alloy steel welding wire containing cerium oxide - Google Patents
Low-alloy steel welding wire containing cerium oxide Download PDFInfo
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- CN100460137C CN100460137C CNB2007100209784A CN200710020978A CN100460137C CN 100460137 C CN100460137 C CN 100460137C CN B2007100209784 A CNB2007100209784 A CN B2007100209784A CN 200710020978 A CN200710020978 A CN 200710020978A CN 100460137 C CN100460137 C CN 100460137C
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Abstract
A welding low-alloy steel electrode containing cerium oxide is composed of a coated layer prepared proportionally from marble, fluorite, ferrotitanium, low-carbon ferrosilicon, middle-carbon ferromanganese, mica, sodium carbonate and CeO2-5, and a core made of H08A steel. It has high tension strength, yield strength and impact strength.
Description
Technical field
The present invention relates to technical field of welding materials, specifically is a kind of low-alloy steel electrode of oxidation-containing cerium.
Background technology
Typical low-alloy steel electrodes such as existing E5515 type are as welding carbon equivalent C
EDuring Hi-Stren steel such as 0.4% medium carbon steel and Q390, for avoiding producing hardened structure and crackle, need adopt special technological measure during welding, as weld preheating to 250 ℃～400 ℃, adopt thin welding rod, little electric current to reduce the depth of fusion of mother metal, slow down the cooling velocity of heat affected area; Postheating and carry out stress relief annealing etc.Increase the production cycle in the middle of this is invisible, increased production cost.Though this type of welding rod price is low, performance is low, the production cost height.
The ultralow hydrogen type electrode that has worked out at present (J * * * H), high-tenacity welding electrodes (J * * * GR) and high toughness super low hydrogen electrode (J * * * welding rod special for special such as RH), the price of these welding rods is more than 1.5 times of common low-alloy high-strength steel covered are welding electrode, though performance height, but price is also high, has therefore limited applying of these welding rods.
Through consulting document, the application of rare earth material in electrode coating, mostly be applied on the surfacing welding at present, several applications is also arranged on low-alloy steel electrode, but usefulness is the more of light rare earth and heavy rare earth mixing or heavy rare earth, because heavy rare earth is more expensive, therefore also make these low-alloy steel electrode price height, the ratio of performance to price is not high.
Separately the light rare earth oxide is used on the electrode coating, still finds no bibliographical information.
Summary of the invention
The low-alloy steel electrode that the purpose of this invention is to provide a kind of oxidation-containing cerium solves the deficiency of above-mentioned welding rod.Do not need preheating before the weldering, need not adopt thin welding rod, little electric current, postwelding does not need to carry out stress relief annealing, has shortened the production cycle, has reduced production cost.Price is low, performance height, cost performance height.
The present invention adopts following technical scheme to realize: a kind of low-alloy steel electrode of oxidation-containing cerium, and compositions of surfacing metal and weight ratio are: marble 39-48%, fluorite 18-26%, ferrotianium 10-12%, low-carbon ferrosilicon 5-8%, mid-carbon fe-mn 3-6%, mica 4-4.5%, soda ash 0.5-1%, CeO
2-5 is 2.6-3.4%.
Compositions of surfacing metal and weight ratio are preferably: marble 46.3%, and fluorite 24.9%, ferrotianium 10.7%, low-carbon ferrosilicon 7%, mid-carbon fe-mn 5.9%, mica 4.3%, soda ash 1%, CeO2-5 are 3%.
The medicinal powder material of said components is mixed the back make binding agent, on the H08A core wire that on the piston type hydraulic press at diameter is 4mm, make low-alloy steel electrode its extrusion with sodium silicate.
Advantage of the present invention is: do not need preheating before the weldering, need not adopt thin welding rod, little electric current, postwelding does not need to carry out stress relief annealing, has shortened the production cycle, has reduced production cost.Price is low, performance height, cost performance height.
The specific embodiment
Below in conjunction with embodiment and experimental example the solution of the present invention and effect are further specified.
Experimental selection of the present invention be that the trade mark is CeO
2-5 regular grade cerium oxide product also is the most cheap a kind of of price in the cerium oxide, and its chemical composition is as shown in table 1.Select for use by electrode coating transition Rare-Earth Ce O
2Mode, with the mechanical property of improving welding rod and the structure property of deposited metal.Selecting alkaline purpose big, the less basic slag system of oxidisability for use is to reduce the scaling loss of cerium oxide under welding condition.
Table 1 CeO
2-5 chemical composition
Do not add CeO
2Welding rod (being E 5515-G type welding rod) coating recipe be reference examples.As shown in table 2.
Table 2 does not add CeO
2Welding rod coating recipe
Select to add cerium oxide, but the amount of cerium oxide should be suitable.When the content of cerium oxide in the coating very little in 2.6% its effect when following, at the mechanical property of 3.4% deposited metal of severe exacerbation when above and the tissue of deposited metal.In testing novel coating recipe during oxidation-containing cerium 2.6-3.4% usability of electrode can and the mechanical property better (actual content of cerium oxide is more much smaller than 2.6-3.4% in deposited metal) of deposited metal.The rolling mill practice of new type of electrode is identical with the rolling mill practice of common low-alloy steel electrode (as E5515 type welding rod).Add Rare-Earth Ce O
2After, because rare earth element easily generates high-melting-point and oxide, sulfide and oxygen sulfur compound etc. that at high temperature plasticity is very little with oxygen and sulphur, can play the effect of desulfating and deoxidation change inclusion morphology.Add the microscopic structure that the proper amount of rare-earth oxide can the refinement deposited metal, rare earth can reduce the hydrogen in the deposited metal, thereby has significantly improved the impact flexibility of deposited metal.Mechanical property is best when the cerium oxide that adds 3%, sees Table 3.
Table 3 does not add and adds CeO
2The comparison of mechanical property of welding rod deposited metal
Adopt the Finder-1000 type X-ray energy spectrometer of BeiJing ZhongKe technology Co., Ltd that the deposited metal field trash is carried out scanning analysis (acquisition condition: accelerating potential: 20.00keV, live time: 44 seconds, the angle of emergence: 35.00 degree), find rare earth content seldom, percentage by weight maximum in weld seam is 0.2756%, sees shown in Figure 1.The electronic energy spectrum analysis result is as shown in table 4.This explanation is in molten drop inside, and rare earth oxide, rare-earth sulfide and rare-earth oxide sulfate major part that inner each reflection in molten bath generates enter residue, and small part remains in deposited metal becomes field trash.
Fig. 1 is the weld seam electronic energy spectrum
Table 4 electronic energy spectrum analysis result
New type of electrode performance height, technology is simple, need not weld preheating, need not adopt thin welding rod, little electric current, and postwelding is not yet With carrying out annealing in process, although the welding rod manufacturing cost has improved 2.1%, owing to need not to adopt special technology with postwelding before the weldering Measure, so total production cost remains reduction. This welding rod cost performance height. The weight that cerium oxide accounts for electrode coating is 3%, At present,
Oxidation-containing cerium weight is in the 350 gram medicinal powder: 350 * 3%g=0.0105kg
The weight that 350 gram medicinal powder can be made welding rod is: 350+10.5+350/0.30g=1.5272kg (gravity coefficient of coating is 0.30)
So the cerium oxide weight that the 1kg welding rod needs is: 0.0105/1.5272=0.006875kg
The 1kg welding rod needs the expense of cerium oxide to be: 30 * 0.006875=0.2063 unit
The expense of novel J557 welding rod per kilogram has improved:
Embodiments of the invention and result of the test
Embodiment 1: add CeO2Be 2.6%. Not preheating need not be adopted thin welding rod, little electric current before weldering, and postwelding need not carry out Test new type of electrode to not adding with the mechanical property of the welding rod deposited metal that adds CeO2 in the situation of annealing in process The result that performance improves is as shown in table 5:
Table 5 adds CeO2The mechanical property of welding rod deposited metal when being 2.6%
Embodiment 2: add CeO
2Be 3%.Not preheating need not be adopted thin welding rod, little electric current before weldering, and postwelding need not carry out testing not adding with the mechanical property of the welding rod deposited metal that adds CeO2 under the situation of annealing in process, and the result that the new type of electrode performance improves is as shown in table 6:
Table 6 adds CeO
2It is the mechanical property of 3% o'clock welding rod deposited metal
Embodiment 3: add CeO
2Be 3.4%.Not preheating need not be adopted thin welding rod, little electric current before weldering, and postwelding need not carry out testing not adding with the mechanical property of the welding rod deposited metal that adds CeO2 under the situation of annealing in process, and the result that the new type of electrode performance improves is as shown in table 7:
Table 7 adds CeO
2It is the mechanical property of 3.4% o'clock welding rod deposited metal
Claims (2)
1. the low-alloy steel electrode of an oxidation-containing cerium, it is characterized in that: mix by the medicinal powder material of following each component and make basic coating, each component of electrode coating and weight ratio are: marble 39-48%, fluorite 18-26%, ferrotianium 10-12%, low-carbon ferrosilicon 5-8%, mid-carbon fe-mn 3-6%, mica 4-4.5%, soda ash 0.5-1%, CeO
2-5 is 2.6-3.4%.
2. the low-alloy steel electrode of oxidation-containing cerium according to claim 1 is characterized in that, each component of electrode coating and weight ratio are: marble 46.3%, fluorite 24.9%, ferrotianium 10.7%, low-carbon ferrosilicon 7%, mid-carbon fe-mn 5.9%, mica 4.3%, soda ash 1%, CeO
2-5 is 3%.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2007100209784A CN100460137C (en) | 2007-03-30 | 2007-03-30 | Low-alloy steel welding wire containing cerium oxide |
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| CNB2007100209784A CN100460137C (en) | 2007-03-30 | 2007-03-30 | Low-alloy steel welding wire containing cerium oxide |
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| CN101028676A CN101028676A (en) | 2007-09-05 |
| CN100460137C true CN100460137C (en) | 2009-02-11 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103962745B (en) * | 2014-04-18 | 2016-08-24 | 中国电建集团上海能源装备有限公司 | Acid slag system stainless steel electrode and coating thereof |
| CN104117784B (en) * | 2014-05-30 | 2016-10-26 | 安徽升鸿电子有限公司 | Welding rod additive of oxidation-containing cerium and preparation method thereof |
| CN106670679B (en) * | 2016-12-06 | 2019-02-05 | 攀枝花学院 | High tensile J507 welding rod and preparation method thereof |
| CN106425167A (en) * | 2016-12-06 | 2017-02-22 | 攀枝花学院 | High-hardness J507 welding rod and preparation method thereof |
| CN106736002B (en) * | 2016-12-06 | 2019-11-05 | 攀枝花学院 | A kind of J507 welding rod and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1089200A (en) * | 1992-12-29 | 1994-07-13 | 陈保国 | Rare-earth type crack-resisting welding electrode without preheating for build-up welding |
| JPH07276081A (en) * | 1994-03-31 | 1995-10-24 | Kobe Steel Ltd | Low hydrogen type coated electrode |
| CN1148529A (en) * | 1995-10-24 | 1997-04-30 | 李向荣 | Preheating-free high anti-cracking surfacing welding electrode |
| CN1152491A (en) * | 1995-12-18 | 1997-06-25 | 邢台神光焊接有限公司 | Surfacing welding electrode for roller |
-
2007
- 2007-03-30 CN CNB2007100209784A patent/CN100460137C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1089200A (en) * | 1992-12-29 | 1994-07-13 | 陈保国 | Rare-earth type crack-resisting welding electrode without preheating for build-up welding |
| JPH07276081A (en) * | 1994-03-31 | 1995-10-24 | Kobe Steel Ltd | Low hydrogen type coated electrode |
| CN1148529A (en) * | 1995-10-24 | 1997-04-30 | 李向荣 | Preheating-free high anti-cracking surfacing welding electrode |
| CN1152491A (en) * | 1995-12-18 | 1997-06-25 | 邢台神光焊接有限公司 | Surfacing welding electrode for roller |
Non-Patent Citations (2)
| Title |
|---|
| 为改善焊条工艺性能计算机对稀土元素含量的优化设计. 陈东高，李云，彭致隆，明珠.兵器材料科学与工程，第24卷第1期. 2001 |
| 为改善焊条工艺性能计算机对稀土元素含量的优化设计. 陈东高，李云，彭致隆，明珠.兵器材料科学与工程，第24卷第1期. 2001 * |
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