CN103418939B - Nitrogen-strengthened hardfacing electrode - Google Patents
Nitrogen-strengthened hardfacing electrode Download PDFInfo
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- CN103418939B CN103418939B CN201310302236.6A CN201310302236A CN103418939B CN 103418939 B CN103418939 B CN 103418939B CN 201310302236 A CN201310302236 A CN 201310302236A CN 103418939 B CN103418939 B CN 103418939B
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Abstract
The invention discloses a nitrogen-strengthened hardfacing electrode, and belongs to the technical field of welding materials. The electrode is composed of a core wire and a coating. The core wire is 1Cr13 martensitic stainless steel or 2Cr13 martensitic stainless steel. The electrode coating comprises 10-30wt% of fluorite, 20-45wt% of marble, 4-8 wt% of titanium dioxide, 2-8wt% of zirconite, 0-5wt% of potassium feldspar, 10-20wt% of nitrogen-bearing ferrochromium, 3-8wt% of ferromanganese, 5-10wt% of ferrotitanium and 5-10wt% of ferrovanadium. According to the nitrogen-strengthened hardfacing electrode, carbon is replaced by nitrogen, the method of nitrogen-strengthened titanium and vanadium microalloying is adopted, and therefore the toughness and the crack resistance of surfacing alloy are improved, and hardness and wear-resisting performance are also improved. The nitrogen-strengthened hardfacing electrode is good in welding process and performance and high in welding crack resisting performance, ensures that the average hardness of a surfacing layer ranges from HRC50 to HRC60 and the abrasive resistance of the surfacing layer is 10-20 times that of Q235 carbon steel, and has the advantages of being strong in air hole preventing ability, good in alloying uniformity degree and the like.
Description
Technical field
The present invention relates to a kind of nitrogen reinforced wear-resistant surfacing welding, belong to technical field of welding materials.This welding rod can be widely used in the roll of steel plant, the surface modification of the coal-grinding roller, engineering excavation machinery, mining machinery etc. in thermal power plant, composite manufacturing and the aspect such as manufacture again.
Background technology
Built-up welding, as the important branch in Rebuilding engineering, is because can form typical metallurgical binding with mother metal.Peeling off in overlay cladding process is under arms inclined to little, and can select according to military service performance or design hardfacing alloy, material or piece surface is made to have the performances such as good wear-resisting, corrosion-resistant, high temperature resistant, radiation hardness, technique has very large flexibility, wherein wear resistance electrode heap is welded in reparation, composite manufacturing and occupies an important position, and is widely used in the wear-corrosion resistance improving mechanical engineering structure.
In the surfacing welding material generally used at present carbon containing and alloying element higher, mainly utilize carbon and chromium, titanium, vanadium, niobium etc. to form carbide hard particle, improve the hardness of surfacing layer metal, thus improve its anti-wear performance.The phosphorus content of this kind of surfacing welding material is high, and anti-weld crack ability is poor, and carbide particle at high temperature easily decomposes, and causes hardness to decline, and anti-wear performance reduces.Usually along with the increase of phosphorus content, carbide content in surfacing layer metal increases, hardness, intensity can raise, but carbide can not be evenly distributed in hardfacing alloy very much, when carbide content is too high, a large amount of carbide can gathering together in grain boundaries bulk, the hardness of hard facing alloy and intensity so not only can not be made effectively to improve, and its toughness can be made obviously to decline.
It is generally acknowledged, reinforcing material surface strength and the effective way improving wearability are to provide case hardness and the obdurability of material, and ideal institutional framework is the particle tough and tensile, continuous print matrix being uniformly distributed high-melting-point, high rigidity, good stability.Nitrogen and carbon are interstitial solute atom, can form the Second Phase Particles of Dispersed precipitate, and nitrogen is less on weldability impact, in welding process, there will not be crackle.Visible, utilize the part carbon that nitrogen replaces in hardfacing alloy, and adopt strong nitrogen element ti, method that V carries out alloying, while improving the toughness of hardfacing alloy, crack resistance, improve the hardness of hardfacing alloy, increase anti-wear performance.For this reason, research and develop a kind of nitrogen reinforced wear-resistant surfacing welding, just become expectation in the industry.
Summary of the invention
The present invention is intended to according to above theoretical, and provide a kind of nitrogen reinforced wear-resistant surfacing welding, core wire is stainless steel, and its innovative point is, the component of coating that parcel dries up on core wire surface and the weight percentage of each component are:
Fluorite 10 ~ 30%,
Marble 20 ~ 45%,
Titanium dioxide 4 ~ 8%,
Zircon 2 ~ 8%,
Potassic feldspar 0 ~ 5%,
Nitrided ferro-chromium 10 ~ 20%,
Ferromanganese 3 ~ 8%,
Ferrotianium 5 ~ 10%,
Vanadium iron 5 ~ 10%.
Core wire involved above, according to the actual needs of engineering, can be common stainless steel.And the present invention's preferably 1Cr13 or 2Cr13 martensitic stain less steel.
The effect of each component of coating is:
Fluorite: slag making and dehydrogenation, realize hydrogen controlled electrode, fully ensures mechanical performance.Its weight percentage is 10 ~ 30%,
Marble: gas making and slag making, butt welded seam plays the effect of gas slag Combined Protection.The proportioning of marble and fluorite is very important: when marble is greater than 1 with the ratio of fluorite, arc stability, and blowing force is large, splashes few.But when marble is greater than 3 with the ratio of fluorite, weld seam has dry slag to occur, de-slag is bad, and slag is glassy, and quality is hard, and the effect even owing to removing hydrogen is not enough and make face of weld have pore.Its weight percentage is 20 ~ 45%,
Titanium dioxide: add a small amount of titanium dioxide in hydrogen controlled electrode, makes coating have good plasticity, to improve welding rod extrusion performance and welding technological properties.Its weight percentage is 4 ~ 8%,
Zircon: improve welding technological properties.Its weight percentage is 2 ~ 8%,
Potassic feldspar: slag making and stabilising arc.Its weight percentage is 0 ~ 5%,
Nitrided ferro-chromium: transition nitrogen element in hardfacing alloy.Its weight percentage is 10 ~ 20%,
Ferromanganese: get rid of the oxygen in weld seam, increases intensity and the hardness of surfacing layer metal.Its weight percentage is: 3 ~ 8%,
Ferrotianium: fixed nitrogen alloy, has deoxidation simultaneously; Form hard, wear-resistant phase while preventing nitrogen pore from being formed in hardfacing alloy, its weight percentage is 5 ~ 10%.
Vanadium iron: fixed nitrogen alloy, forms hard, wear-resistant phase while preventing nitrogen pore from being formed in hardfacing alloy.Its weight percentage is 5 ~ 10%.
The present invention utilizes nitrogen to replace part carbon, adopts the method for strong nitrogen element ti, V alloy, while improving the toughness of hardfacing alloy, crack resistance, improves hardness, increases anti-wear performance.Result of practical application shows, this welding rod bead-welding technology is functional, and anti-weld crack performance is high, overlay cladding average hardness HRC50-60, wearability be the 10-20 of Q235 carbon steel doubly, and there is the advantages such as the strong and alloying uniformity coefficient of anti-pore ability is good.
Accompanying drawing explanation
Fig. 1 is a kind of fabrication processing figure of the present invention.
Detailed description of the invention
The solution of the present invention and effect is further illustrated below in conjunction with example.
Embodiment 1
Core wire: diameter phi 3.2mm 1Cr13 martensitic stain less steel
Coating recipe:
Fluorite 25%,
Marble 35%,
Titanium dioxide 5%,
Zircon 5%,
Potassic feldspar 3%,
Nitrided ferro-chromium 12%,
Ferromanganese 5%,
Ferrotianium 6%,
Vanadium iron 4%.
Preparation method as shown in Figure 1.
Wherein coating thickness 1.5-2.00mm; Welding rod overlay cladding average hardness HRC51.
Example 2
Core wire: diameter phi 4.0mm, 2 Cr13 martensitic stain less steels
Coating recipe:
Fluorite 20%,
Marble 35%,
Titanium dioxide 5%,
Zircon 3%,
Potassic feldspar 2%,
Nitrided ferro-chromium 15%,
Ferromanganese 4%,
Ferrotianium 8%,
Vanadium iron 8%.
Manufacture method is with example 1
Wherein coating thickness 1.5-2.00mm, welding rod overlay cladding average hardness HRC58.
In above two examples, binding agent used is waterglass, also can adopt the clay of subparticle shape, or white lime.And the diameter of described core wire is within the scope of φ 3 ~ 5mm.
Claims (4)
1. a nitrogen reinforced wear-resistant surfacing welding, this welding rod is by stainless steel core wire and wrap up drying up by binding agent and to form at the coating on core wire surface, and it is characterized in that, the component of described coating and the weight percentage of each component are:
Fluorite 10 ~ 30%,
Marble 20 ~ 45%,
Titanium dioxide 4 ~ 8%,
Zircon 2 ~ 8%,
Potassic feldspar 0 ~ 5%,
Nitrided ferro-chromium 10 ~ 20%,
Ferromanganese 3 ~ 8%,
Ferrotianium 5 ~ 10%,
Vanadium iron 5 ~ 10%.
2. welding rod according to claim 1, is characterized in that, described core wire, be 1Cr13 or 2Cr13 martensitic stain less steel, and the diameter of described core wire is within the scope of φ 3 ~ 5mm.
3. welding rod according to claim 1, it is characterized in that, described coating is by after becoming coating with binding agent wet-mixing, through twisting of core wire and described coating, and then to wrap up through drying, curing and dry up on core wire surface, and the thickness of described coating is within the scope of 1.5 ~ 2.5mm.
4. the welding rod according to claim 1 or 3, is characterized in that, described binding agent is waterglass, or clay, or white lime.
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| CN201310302236.6A CN103418939B (en) | 2013-07-19 | 2013-07-19 | Nitrogen-strengthened hardfacing electrode |
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| CN103418939B true CN103418939B (en) | 2015-04-15 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104476012A (en) * | 2014-10-31 | 2015-04-01 | 河海大学常州校区 | Niobium-strengthened wear-resisting surfacing electrode and preparation method thereof |
| CN104493375A (en) * | 2014-10-31 | 2015-04-08 | 河海大学常州校区 | Titanium-reinforced hardfacing electrode and manufacturing method thereof |
| CN104476014A (en) * | 2014-10-31 | 2015-04-01 | 河海大学常州校区 | Vanadium-strengthened wear resistant surfacing electrode and preparation method thereof |
| CN104816108B (en) * | 2015-05-19 | 2017-08-25 | 河海大学常州校区 | A kind of resisting silt abrasion hardfacing electrode |
| CN105108278B (en) * | 2015-08-31 | 2017-09-29 | 鲁西化工集团股份有限公司 | A kind of method for improving welding by both sides welding efficiency |
| CN106041370A (en) * | 2016-06-25 | 2016-10-26 | 袁春华 | Preparation method of hardfacing electrode |
| CN106736041A (en) * | 2016-12-08 | 2017-05-31 | 河海大学常州校区 | A kind of self-protecting flux-cored wire for hardfacing |
| CN106624465B (en) * | 2016-12-08 | 2019-07-26 | 河海大学常州校区 | A kind of hardfacing electrode and preparation method thereof |
| CN110877170A (en) * | 2019-12-04 | 2020-03-13 | 河海大学常州校区 | Surfacing electrode, preparation method and dredging reamer abrasion repair surfacing method |
| CN111922549B (en) * | 2020-07-30 | 2022-02-25 | 内蒙古一机集团神鹿焊业有限公司 | High-hardness wear-resistant surfacing welding electrode and preparation method thereof |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1181940A (en) * | 1968-09-11 | 1970-02-18 | Inst Elektroswarki Patona | Welding Electrode for Hard Surfacing of Steel Parts |
| SU386735A1 (en) * | 1971-12-13 | 1973-06-21 | С. Л. Миличенко, Е. Н. Матвейшин , А. Г. Цукило Запорожский машиностроительный институт В. Я. Чубар | WELDING ELECTRODE -? * 4 |
| SU406678A1 (en) * | 1972-07-12 | 1973-11-21 | М. И. Разиков, Н. В. Королев , О. И. Рылов Уральский политехнический институт С. М. Кирова | |
| SU490611A1 (en) * | 1974-01-23 | 1975-11-05 | Всесоюзный научно-исследовательский и проектно-технологический институт угольного машиностроения | Electrode for surfacing |
| SU950509A1 (en) * | 1981-01-16 | 1982-08-15 | Запорожский Ордена "Знак Почета" Машиностроительный Институт Им.В.Я.Чубаря | Electrode coating composition |
| CN1490121A (en) * | 2003-05-09 | 2004-04-21 | 燕山大学 | Nitrogenous welding wire for railway frog |
| CN103084757B (en) * | 2013-01-23 | 2016-01-27 | 西安理工大学 | High tenacity Low-hydrogen alkaline electrode and preparation method thereof |
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Effective date of registration: 20181114 Address after: 213000 Factory Building 17A of Zhisi Industrial Park No. 18 Fengming Road, Wujin National High-tech Industrial Development Zone, Changzhou City, Jiangsu Province Patentee after: Ousheng Welding Technology (Changzhou) Co.,Ltd. Address before: 213022 No. 200 Jinling North Road, Xinbei District, Changzhou, Jiangsu Patentee before: CHANGZHOU CAMPUS OF HOHAI University |