CN1054924A - Moisture resistant austenitic stainless steel welding electrode - Google Patents
Moisture resistant austenitic stainless steel welding electrode Download PDFInfo
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- CN1054924A CN1054924A CN 90101679 CN90101679A CN1054924A CN 1054924 A CN1054924 A CN 1054924A CN 90101679 CN90101679 CN 90101679 CN 90101679 A CN90101679 A CN 90101679A CN 1054924 A CN1054924 A CN 1054924A
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Abstract
Moisture resistant austenitic stainless steel welding electrode, be to have anti humility performance, only need low temperature drying when promptly making, do not require multiple baking before the use, pore-free during welding, coating do not have the titanium type coating 19-10 type stainless steel electrode of cracking, obscission, it is characterized in that adding in electrode coating 15-32% enhydrite (kaolin, white clay, mica etc.), control coating moisture is a kind of not only economy but also stainless steel electrode easy to utilize in the 1.5-2.5% scope.
Description
Moisture resistant austenitic stainless steel welding electrode of the present invention is a kind of anti humility performance that has, and only needs the lower temperature oven dry when promptly making, and does not require multiple baking before the use, and pore does not appear in weld seam during welding, and coating does not have the stainless steel electrode of the titanium type 19-10 type of cracking, obscission.
The 19-10 type stainless steel electrode of normally used titanium type coating, weld seam is easy to generate hydrogen blistering during welding.Therefore require to reduce the moisture in the electrode coating, with the hydrogen blistering that prevents from when welding, to produce as far as possible.So in the welding rod manufacture process, require welding rod in higher temperature (more than 300 ℃) oven dry, welding rod before use need be 250 ℃ of multiple bakings under 300～350 ℃ of temperature even, to remove adsorbed water in the electrode coating, otherwise be difficult to the assurance weld seam pore does not appear.
Because the stainless steel electrode resistance coefficient is bigger, welding rod is easy to generate the cracking phenomena of coating when higher temperature is dried, and when drying by the fire again before use, cause bond strength decline between core wire and the coating, cause that the coating obscission appears in the welding rod end in the welding process, influence normally carrying out of welding process,, stainless steel electrode is scrapped if when welding rod repeatedly dries by the fire again.Cause serious economy loss.
In order to address the above problem, it is double-deck 19-10 type stainless steel electrode that the clear 61-206596 of Japan Patent has proposed a kind of coating, this electrode coating is divided into internal layer and skin, the internal layer coating is titanium type or low hydrogen type, and the outer refractory layer of forming by carbonate minerals such as calcium carbonate, magnesium carbonate, improved the heat resistance of welding rod greatly, welding rod bake out temperature is during fabrication brought up to 500 ℃.The major defect of the present invention is a double-layer coating manufacturing process complexity, is difficult to extensive employing.
The clear 54-62135 of Japan Patent has proposed a kind of structural steel iron powder electrode in addition; in coating, add cellulose and make gas-forming agent; cause gas shield during welding; and prevent that weld seam from producing pore; because it is excessive that the cellulose addition surpasses 2% o'clock weld fumes; cellulosic addition is restricted; thereby add enhydrites such as potter's clay, kaolin, talcum; its coating water content is that 0.8～1.5%(coating is heated to the amount of moisture of emitting below 1000 ℃); when welding, decompose the hydrogen that produces with moisture and make protection gas, the deficiency of supplementary fibre element gas making.Obviously the purpose that adds cellulose and enhydrite in this invention electrode coating is that enough protective gas are provided when welding, produces nitrogen pore to prevent weld seam.But 19-10 type stainless steel electrode generally can nitrogen pore not occur by the image structures steel like that, and is only relatively responsive to hydrogen blistering, obviously can not eliminate hydrogen blistering with the way of strengthening gas shield.
The purpose of moisture resistant austenitic stainless steel welding electrode of the present invention is: find out the quantitative relation between titanium type 19-10 type stainless steel electrode coating water content and the pore tendency and have the specified conditions of this relation, thereby provide a kind of by increasing the coating water content, cooperate low temperature drying and control to adjust the scheme of other compositions, reach the purpose of eliminating hydrogen blistering, preventing coating cracking, obscission.
Moisture resistant austenitic stainless steel welding electrode of the present invention, be to be foundation with the represented rule of the quantitative relation curve (seeing accompanying drawing) between the titanium type 19-10 stainless steel electrode coating water content that finds by a large amount of tests and the pore tendency, by increasing the coating water content, make it be in the high-moisture place of safety, and make weld joint stable ground overcome pore.Represented coating water content and the rule between the weld porosity in the accompanying drawing, can describe like this: when percentage of moisture for covering＜0.35%, because the source of hydrogen is seldom, weld seam does not produce hydrogen blistering, represented A district, i.e. low moisture place of safety in Here it is the accompanying drawing; When the coating water content is increased to 0.4%, its water content enters the pore sensitizing range, i.e. B district among the figure, the weld porosity tendency obviously increases, when the coating water content further increases, hydrogen is dissolved into the also corresponding increase of amount in the molten bath, but the speed that while hydrogen is overflowed from the molten bath also increases gradually, when amount of moisture surpassed 0.6%, the further increase of the effusion speed of hydrogen made the pore tendency reduce gradually on the contrary, up to the coating water content above 1.5% o'clock, pore is then eliminated fully, and this moment, the coating water content was in the C district in the accompanying drawing, i.e. high-moisture place of safety.
Normally used this class stainless steel electrode in fact all is to adopt the approach that as far as possible reduces the coating water content, makes the coating water content be controlled at the low moisture place of safety, avoids hydrogen blistering.Improve the welding rod bake out temperature with regard to inevitable requirement so as far as possible, reduce percentage of moisture for covering, and before welding rod uses, must toast once more, to remove the moisture of welding rod absorption when storing, coating cracking and coating and core wire bond strength variation have so just appearred, coating problem such as come off during welding.
Moisture resistant austenitic stainless steel welding electrode of the present invention is characterized in that, utilize titanium type 19-10 stainless steel electrode coating water content and pore the tendency between quantitative relation and the rule of action condition, the coating water content is controlled at corresponding high-moisture place of safety, to eliminate pore.For realizing this point, in coating, add on the one hand enhydrites such as kaolin, white clay, mica (account for coating weight 15～32%), adopt the method for low bake out temperature on the other hand, make coating increase adsorbed water, make the coating total moisture content reach 1.5～2.5%, and be in the high-moisture place of safety of coating.In the welding rod storage process, when the coating moisture absorption, adsorbed water own increases, and the coating water content more trends towards the right-hand of curve high-moisture place of safety among the figure, and pore more can not take place.Just because of this, the multiple baking before welding rod of the present invention does not need to use can stably prevent pore.
Being designed to of moisture-proof stainless steel electrode compositions of surfacing metal (percentage by weight) of the present invention: TiO
230～50%, the summation 10～20% of carbonate and fluoride, the summation 15～32% that contains the mineralogical composition (mineral such as kaolin, white clay, mica more than one) of the crystallization water, ferrosilicon＜3%, other metals, powder and ferroalloy 15～25%, other mineralogical compositions 0～14%, percentage of moisture for covering (measure with absorbing weight method, press 3.7 regulations among the GB5118-85) 1.5～2.5%.Adopt HoCr21Ni10 type core wire, its chemical composition meets GB424 1-84 regulation.
The welding rod deposited metal composition is: C≤0.08%, Mn 0.5～2.5%, Si≤1.5%, Cr18.0～21.0%, Ni9.0～11.0%, S≤0.025%, P≤0.035%, the mechanical performance of deposited metal: σ
b〉=550MPa, δ
S〉=30%.
Embodiment one
Adopt HoCr21Ni10 type core wire, chemical composition meets the GB4241-84 regulation.Electrode size is 4 millimeters, and length is 350 millimeters, and compositions of surfacing metal (by weight percentage) is: rutile 29, titanium dioxide 8, fluorite 9, marble 7, mica 11, white clay 6, kaolin 3, feldspar 11, crome metal 12, manganese metal 4.
Embodiment two
Employing is as core wire as described in the embodiment one, and compositions of surfacing metal (by weight percentage) is: rutile 38, titanium dioxide 4, fluorite 8, dolomite 7, mica 13, white clay 10, kaolin 4, manganese metal 5, crome metal 10, ferrotianium 1.
Embodiment three
Adopt as embodiment one described core wire, compositions of surfacing metal (by weight percentage) is: rutile 30, titanium dioxide 9, ice crystal 4.5, fluorite 4, marble 7.5, mica 8, white clay 10, kaolin 4, crome metal 11, manganese metal 5, feldspar 6, ferrotianium 1.
More than each embodiment welding rod bake out temperature be 200～220 ℃, temperature retention time is 0.8～1 hour.
In sum, moisture resistant austenitic stainless steel welding electrode of the present invention can utilize the ordinary carbon steel welding rod production line to produce owing to take low temperature drying technology fully, simplified the manufacturing process of welding rod, shorten the production cycle, saved the energy simultaneously, reduced manufacturing cost; This welding rod does not require multiple baking before using, and this just guarantees that the stainless steel electrode coating has enough intensity, avoids the waste of the stainless steel electrode that causes because coating ftractures, comes off; The anti humility performance that this welding rod itself has has very strong adaptive capacity to greasy dirt, the moisture of weldment, has alleviated before the weldering the workload of weldment cleaning, has removed multiple baking operation from before the weldering simultaneously, and this especially provides great convenience to the welding procedure operation in field.
Description of drawings:
Curve is represented the relation of titanium type 19-10 stainless steel electrode coating water content and pore tendency among the figure, be divided into three districts among the figure, the B district is the pore sensitizing range, A district and C district represent low moisture and high-moisture place of safety respectively, the abscissa of curve is the percetage by weight of coating water content, ordinate is represented pore tendency, I-pore-free of representing on the reference axis; II-indivedual pores; III-increased number of stomata; IV-volume pore.
Claims (4)
1, moisture resistant austenitic stainless steel welding electrode is the titanium type coating I9-Io type austenite stainless steel-made welding rod that adds the enhydrite composition in a kind of coating, it is characterized in that in coating, adding 15～32% enhydrites, control coating water content is in high-moisture place of safety scope 1.5～2.5%, it is a kind of anti humility performance that has, do not need multiple baking before promptly using, do not occur pore during welding, do not have the stainless steel electrode of coating cracking, obscission during welding, this electrode coating composition (by weight percentage) is: TiO
230～50%, carbonate and fluoride summation are 10～20%, enhydrite composition (adopt kaolin, white clay, mica etc. more than one) summation is 15～32%, ferrosilicon＜3%, other metal powders and ferroalloy are 15～25%, other mineralogical compositions are 0～14%, and percentage of moisture for covering is that 1.5～2.5% core wire models that adopt are ROCr21Ni10, and chemical composition meets the GB4241-84 regulation.
2, according to the described moisture resistant austenitic stainless steel welding electrode of claim 1, it is characterized in that this welding rod optimum implementation is: adopting diameter is 4 millimeters, 350 millimeters of length, composition core wire as claimed in claim 1, the compositions of surfacing metal (percentage by weight) that adopts is: rutile 29, titanium dioxide 8, mica 11, white clay 6, kaolin 3, feldspar 11, crome metal 12, manganese metal 4, fluorite 9, marble 7.
3, according to the described moisture-resistant stainless steel electrode of claim 1, it is characterized in that this welding rod can also be by following scheme implementation, adopt core wire as claimed in claim 2, coating is formed (percentage by weight) by following composition: rutile 38, titanium dioxide 4, fluorite 8, dolomite 7, mica 13, white clay 10, kaolin 4, manganese metal 5, crome metal 10, ferrotianium 1.
4, according to the described moisture resistant austenitic stainless steel welding electrode of claim 1, it is characterized in that this welding rod can also be by following scheme implementation, employing is as core wire as described in the claim 2, and compositions of surfacing metal (percentage by weight) is: rutile 30, titanium dioxide 9, ice crystal 4.5, fluorite 4, marble 7.5, mica 8, white clay 10, kaolin 4, crome metal 11, manganese metal 5, feldspar 6, ferrotianium 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90101679 CN1018343B (en) | 1990-03-22 | 1990-03-22 | Moisture resistant austenitic stainless steel welding electrode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90101679 CN1018343B (en) | 1990-03-22 | 1990-03-22 | Moisture resistant austenitic stainless steel welding electrode |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1054924A true CN1054924A (en) | 1991-10-02 |
| CN1018343B CN1018343B (en) | 1992-09-23 |
Family
ID=4877195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90101679 Expired CN1018343B (en) | 1990-03-22 | 1990-03-22 | Moisture resistant austenitic stainless steel welding electrode |
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| CN (1) | CN1018343B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101700607B (en) * | 2009-11-13 | 2011-05-18 | 北京金威焊材有限公司 | Special stainless steel electrode for deep refrigerating project |
| CN1939649B (en) * | 2005-09-30 | 2011-10-12 | 中国船舶重工集团公司第七二五研究所 | High-strength underwater welding electrodes |
| CN108311809A (en) * | 2017-12-22 | 2018-07-24 | 洛阳双瑞特种合金材料有限公司 | A kind of electrode coating, the welding rod with low-crackle sensitive and its preparation and application |
| CN108515288A (en) * | 2018-05-08 | 2018-09-11 | 山东省科学院海洋仪器仪表研究所 | One kind paddle welding welding rod and coating under environment, and preparation method thereof |
| CN109848607A (en) * | 2019-01-16 | 2019-06-07 | 阜阳佳派生产力促进中心有限公司 | A kind of preparation method of the brazing material welded for steel alloy and silicon carbide ceramics |
| CN111037153A (en) * | 2019-12-27 | 2020-04-21 | 中国第一重型机械集团大连加氢反应器制造有限公司 | E316H type welding rod for manufacturing fast neutron reactor equipment |
| CN115229383A (en) * | 2022-09-23 | 2022-10-25 | 四川西冶新材料股份有限公司 | Acid stainless steel welding rod free of repeated baking and preparation method thereof |
-
1990
- 1990-03-22 CN CN 90101679 patent/CN1018343B/en not_active Expired
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1939649B (en) * | 2005-09-30 | 2011-10-12 | 中国船舶重工集团公司第七二五研究所 | High-strength underwater welding electrodes |
| CN101700607B (en) * | 2009-11-13 | 2011-05-18 | 北京金威焊材有限公司 | Special stainless steel electrode for deep refrigerating project |
| CN108311809A (en) * | 2017-12-22 | 2018-07-24 | 洛阳双瑞特种合金材料有限公司 | A kind of electrode coating, the welding rod with low-crackle sensitive and its preparation and application |
| CN108515288A (en) * | 2018-05-08 | 2018-09-11 | 山东省科学院海洋仪器仪表研究所 | One kind paddle welding welding rod and coating under environment, and preparation method thereof |
| CN108515288B (en) * | 2018-05-08 | 2020-10-23 | 山东省科学院海洋仪器仪表研究所 | Welding rod and coating for welding in wading environment and preparation method thereof |
| CN109848607A (en) * | 2019-01-16 | 2019-06-07 | 阜阳佳派生产力促进中心有限公司 | A kind of preparation method of the brazing material welded for steel alloy and silicon carbide ceramics |
| CN109848607B (en) * | 2019-01-16 | 2020-11-27 | 阜阳佳派生产力促进中心有限公司 | Preparation method of brazing material for welding alloy steel and silicon carbide ceramic |
| CN111037153A (en) * | 2019-12-27 | 2020-04-21 | 中国第一重型机械集团大连加氢反应器制造有限公司 | E316H type welding rod for manufacturing fast neutron reactor equipment |
| CN115229383A (en) * | 2022-09-23 | 2022-10-25 | 四川西冶新材料股份有限公司 | Acid stainless steel welding rod free of repeated baking and preparation method thereof |
| CN115229383B (en) * | 2022-09-23 | 2022-12-16 | 四川西冶新材料股份有限公司 | Acid stainless steel welding rod free of repeated baking and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1018343B (en) | 1992-09-23 |
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