CN102886620A - Nitrogen and boron alloying high tenacity hardfacing flux-cored wire - Google Patents
Nitrogen and boron alloying high tenacity hardfacing flux-cored wire Download PDFInfo
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- CN102886620A CN102886620A CN2012104110834A CN201210411083A CN102886620A CN 102886620 A CN102886620 A CN 102886620A CN 2012104110834 A CN2012104110834 A CN 2012104110834A CN 201210411083 A CN201210411083 A CN 201210411083A CN 102886620 A CN102886620 A CN 102886620A
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Abstract
The invention relates to a nitrogen and boron alloying high tenacity hardfacing flux-cored wire. The skin of the nitrogen and boron alloying high tenacity hardfacing flux-cored wire adopts a mild-carbon steel strip, and the core part is filled with alloy or mineral powder, and is pulled into a wire. The nitrogen and boron alloying high tenacity hardfacing flux-cored wire is characterized in that nitrogen and boron compounds, such as NaN3, BN and the like and a rear earth oxide are added into flux-cored powder to realize the surfacing metal nitrogen and boron alloying. The flux-cored wire comprises chemical components (weight percentage) including 1.0-3.0 % of carbon, 35-40% of chromium, 1.0-2.0% of niobium, 3.0-8.0% of boron, 2.0-5.0% of nitrogen, 1.0-2.0% of molybdenum, 1.0-2.5% of rare earth oxide, and the balance of iron or other impurities. Because the flux-cored wire adopts nitrogen and boron to replace part of carbon alloying surfacing metal, the hardness of a surfacing layer is high, and the highest hardness can reach HRC 66-69. The nitrogen and boron alloying high tenacity hardfacing flux-cored wire has the advantages of favorable toughness and outstanding wear resistance. The nitrogen and boron alloying high tenacity hardfacing flux-cored wire can be mainly used for the surfacing repair and the composite manufacturing of easily-damaged parts of ferrous metallurgy equipment, building machinery and the like.
Description
Technical field
The invention belongs to the solder wire material technical field, be specifically related to a kind of high nitrogen, boron alloy abrasion-proof overlaying welding flux-cored wire, be mainly used in consumable accessory built-up welding reparation and the composite manufacturings such as Ferrous Metallurgy equipment, building machinery.
Background technology
Hardfacing materials is main mainly with rich chromium cast iron at present, namely contain the alloying elements such as carbon, chromium, silicon, manganese, with certain carbide, by a large amount of facts have proved, rich chromium cast iron has very strong practicality as hardfacing powder core material, hardness than general built-up welding powder core material is all high, and wearability is better, and the tool processing characteristics also is greatly improved.Flux-cored wire is saved time, and then is created more economic interests owing to the efficient that can significantly improve the built-up welding reparation or pile brave composite manufacturing, and enjoys businessman's favor.But traditional flux-cored wire hardness is low, wearability is bad, service life is short.Present hard-face alloy flux-cored wire material generally adopts carbon to carry out alloying, and this material carbon equivalent height, anti-weld crack poor performance, plasticity be low, easily peel off, high-temperature stability is lower, poor corrosion resistance.
Boron is abundant at China's reserves, and FeB, the Fe of boron and iron generation
2B can improve surfacing hardness largely.Nitrogen and carbon have similarity, with nitrogen, boron Substitute For Partial carbon alloy deposited metal, can reduce the carbon equivalent of solder wire material, thereby improve the cracking resistance, hardness, toughness, wearability etc. of overlay cladding.Therefore, nitrogen boron is that surfacing welding alloy has preferably application prospect.
Summary of the invention
A kind of high nitrogen provided by the invention, boron alloy abrasion-proof overlaying welding flux-cored wire material, its wearability mainly by with nitrogen, boron Substitute For Partial carbon alloy deposited metal, reduce the carbon equivalent of solder wire material, thereby improve anti-weld crack performance; And FeB, Fe that boron and iron generate
2B can improve surfacing hardness largely, a small amount of boron can the refinement alloy in carbide grain, obviously improve quenching degree, hardness and the wearability of chrome cast iron.The present invention is by mild steel foreskin and medicine core powder constituent.
A kind of high nitrogen provided by the invention, boron alloy abrasion-proof overlaying welding flux-cored wire material, its wearability mainly by with nitrogen, boron Substitute For Partial carbon alloy deposited metal, reduce the carbon equivalent of solder wire material, thereby improve anti-weld crack performance; And FeB, Fe that boron and iron generate
2B can improve surfacing hardness largely, a small amount of boron can the refinement alloy in carbide grain, obviously improve quenching degree, hardness and the wearability of chrome cast iron.The present invention is by mild steel foreskin and medicine core powder constituent.
The technical scheme of taking for achieving the above object is: a kind of high nitrogen, boron alloy abrasion-proof overlaying welding flux-cored wire, and its crust adopts the H08A mild-carbon steel strip, core filler alloys or mineral dust, medicine core powder is mainly by high carbon ferro-chrome, chromium powder, ferro-niobium, NaN
3, BN, molybdenum-iron and rare earth oxide evenly mix according to a certain percentage, carbon, chromium, niobium, boron, nitrogen, molybdenum, the shared welding wire percentage by weight of rare earth element element are in the medicine core powder: carbon 1.0-3.0%, chromium 35-40%, niobium 1.0-2.0%, boron 3.0-8.0%, nitrogen 2.0-5.0%, molybdenum 1.0-2.0%, rare earth 1.0-2.5%, surplus is iron or other impurity.
The present invention is characterised in that in medicine core pulvis and adds nitrogen, boron compound such as NaN
3, BN etc. and rare earth oxide.
The rare earth oxide that adds in the above-mentioned hardfacing medicine core powder is lanthana (La
2O
3), cerium oxide (general name of the oxide of cerium), praseodymium oxide (Pr
6O
11), or their mixture.
The effect of main component is as follows in the medicine core:
High carbon ferro-chrome, chromium powder: introduce carbon and chromium element, carbon content is higher, and the hardness of overlay cladding is higher; Cr is the ferrite element, with the increase that contains the Cr amount, can limit thickization of austenite crystal, forms simultaneously CrB and Cr
2C
3,Cause the crystal boundary area coverage to increase, the anti-wear performance of overlay cladding also improves thereupon.
Ferro-niobium: introduce the niobium element, can the refinement deposited metal, improve the hardness of deposited metal, add that the carbide of formed niobium can be used as the hard phase particle behind the niobium, improve the hardness of overlay cladding; Can reduce because of micro-cutting and the wearing and tearing that " plough " effect forms after adding simultaneously niobium, significantly improve the wearability of overlay cladding.
NaN
3, BN: introduce nitrogen, boron and sodium element, with nitrogen, boron Substitute For Partial carbon alloy deposited metal, improve surfacing hardness, wearability and toughness; The sodium element of introducing simultaneously can play the effect of stable arc.
Molybdenum-iron: introduce molybdenum element, molybdenum is stronger carbide former, when the content of molybdenum is more, will form double carbide and carbide [(F e, M o) in the deposited metal
6C, M o C], the hardness of alloy is improved greatly; Simultaneously, phase transformation has strong inhibitory action to molybdenum to perlite, will impel the martensite that contains molybdenum to produce, and this high alloy martensite phase hardness is very high, thereby significantly improves the wearability of layer metal.
Rare earth oxide: rare earth oxide energy refinement overlay cladding carcass metal structure, eliminate the defective of carcass metal, refinement carcass metal fracture dimple and making is torn rib quantity to be increased, improve overlay cladding impact flexibility and plasticity, impel ceramic on metal to become polycrystalline transition region and local amorphous state phase with the carcass metal interface, improve the bond strength at interface, the adding of rare earth oxide is little on the impact of carcass metal microstructure hardness, but can significantly improve the wearability under the overlay cladding dry friction and wear state, have certain antifriction function.
The present invention is relative, and the prior art advantage is as follows:
The present invention is by adding NaN
3, BN, introduce nitrogen, boron and sodium element.Nitrogen and boron and carbon have similarity, are the interstitial solute atom, and can both form Second Phase Particles with the alloying element such as Cr; Boron (B) can produce the effect of playing intercrystalline strengthening of assembling near crystal boundary, and an amount of boron can play the benefit that increases primary carbide quantity, a small amount of boron can the refinement alloy in carbide grain, obviously improve quenching degree, hardness and the wearability of chrome cast iron.Replace part carbon to carry out alloying with nitrogen, boron, can reduce the carbon equivalent of solder wire material, thereby improve anti-weld crack performance, hardness, toughness, the wearability of overlay cladding.Simultaneously, the sodium element of introducing can play the effect of stable arc.
Welding wire of the present invention is realized by the following method:
The method be with steel band by rolling, roll into U-shaped groove, good and through well-mixed medicine core powder (selected powder size is more than 70 orders) toward wherein adding configured in advance again, filling rate is 42%-55%.
1. through repeatedly rolling, U-shaped groove is rolled into O shape, and then arrives respective diameters size, last smart coiled dish with wire drawing machine drawing tube reducing.
The specific embodiment:
Embodiment 1
With high carbon ferro-chrome, chromium powder, ferro-niobium, NaN
3, BN, molybdenum-iron and rare earth oxide evenly mix according to a certain percentage, so that carbon, chromium, niobium, boron, nitrogen, molybdenum, the shared welding wire percentage by weight of rare earth element are in the medicine core powder: carbon 1.0%, chromium 35%, niobium 1.0%, boron 3.0%, nitrogen 2.0%, molybdenum 1.0%, rare earth 1.0%, surplus are iron or other impurity.Selecting 12 * 0.2(width is 12 ㎜, and thickness is 0.2 ㎜) the H08A cold-rolled strip.First it is rolled into U-shaped.The granularity of the powder of getting is for can pass through 70 purpose sieves.The various powder of getting are put into mixed powder machine mixed 40 minutes, then mixed-powder is added in the type H08A cold-rolled steel trough of belt, filling rate is 42%, and U-shaped groove is healed up, and makes the medicinal powder parcel wherein.And then with wire drawing machine by road drawing, tube reducing, make at last its diameter reach 2.8 ㎜, the surfacing layer metal hardness that makes at last is 55-60HRC, wearability is good.
Embodiment 2
With high carbon ferro-chrome, chromium powder, ferro-niobium, NaN
3, BN, molybdenum-iron and rare earth oxide evenly mix according to a certain percentage, so that carbon, chromium, niobium, boron, nitrogen, molybdenum, the shared welding wire percentage by weight of rare earth element are in the medicine core powder: carbon 1.5%, chromium 36%, niobium 1.5%, boron 4.0%, nitrogen 3.0%, molybdenum 1.5%, rare earth 1.5%, surplus are iron or other impurity.Selecting 12 * 0.2(width is 12 ㎜, and thickness is 0.2 ㎜) the H08A cold-rolled strip.First it is rolled into U-shaped.The granularity of the powder of getting is for can pass through 70 purpose sieves.The various powder of getting are put into mixed powder machine mixed 40 minutes, then mixed-powder is added in the U-shaped H08A cold-rolled steel trough of belt, filling rate is 42%, and U-shaped groove is healed up, and makes the medicinal powder parcel wherein.And then with wire drawing machine by road drawing, tube reducing, make at last its diameter reach 2.8 ㎜, the surfacing layer metal hardness that makes at last is 58-62HRC, wearability is good.
Embodiment 3
With high carbon ferro-chrome, chromium powder, ferro-niobium, NaN
3, BN, molybdenum-iron and rare earth oxide evenly mix according to a certain percentage, so that carbon, chromium, niobium, boron, nitrogen, molybdenum, the shared welding wire percentage by weight of rare earth element are in the medicine core powder: carbon 1.5%, chromium 38%, niobium 2.0%, boron 6.0%, nitrogen 5.0%, molybdenum 1.5%, rare earth 2.0%, surplus are iron or other impurity.Selecting 14 * 0.3(width is 14 ㎜, and thickness is 0.3 ㎜) the H08A cold-rolled strip.First it is rolled into U-shaped.The granularity of the powder of getting is for can pass through 70 purpose sieves.The various powder of getting are put into mixed powder machine mixed 40 minutes, then mixed-powder is added in the U-shaped H08A cold-rolled steel trough of belt, filling rate is 48%, and U-shaped groove is healed up, and makes the medicinal powder parcel wherein.And then with wire drawing machine by road drawing, tube reducing, make at last its diameter reach 3.2 ㎜, the surfacing layer metal hardness that makes at last is 60-64HRC, wearability is good.
Embodiment 4
With high carbon ferro-chrome, chromium powder, ferro-niobium, NaN
3, BN, molybdenum-iron and rare earth oxide evenly mix according to a certain percentage, so that carbon, chromium, niobium, boron, nitrogen, molybdenum, the shared welding wire percentage by weight of rare earth element are in the medicine core powder: carbon 2.0%, chromium 37%, niobium 2.0%, boron 5.0%, nitrogen 5.0%, molybdenum 2.0%, rare earth 2.0%, surplus are iron or other impurity.Selecting 14 * 0.3(width is 14 ㎜, and thickness is 0.3 ㎜) the H08A cold-rolled strip.First it is rolled into U-shaped.The granularity of the powder of getting is for can pass through 70 purpose sieves.The various powder of getting are put into mixed powder machine mixed 40 minutes, then mixed-powder is added in the U-shaped H08A cold-rolled steel trough of belt, filling rate is 48%, and U-shaped groove is healed up, and makes the medicinal powder parcel wherein.And then with wire drawing machine by road drawing, tube reducing, make at last its diameter reach 3.2 ㎜, the surfacing layer metal hardness that makes at last is 65-66HRC, wearability is good.
Embodiment 5
With high carbon ferro-chrome, chromium powder, ferro-niobium, NaN
3, BN, molybdenum-iron and rare earth oxide evenly mix according to a certain percentage, so that carbon, chromium, niobium, boron, nitrogen, molybdenum, the shared welding wire percentage by weight of rare earth element are in the medicine core powder: carbon 2.5%, chromium 38%, niobium 2.0%, boron 6.0%, nitrogen 5.0%, molybdenum 2.0%, rare earth 2.0%, surplus are iron or other impurity.Selecting 16 * 0.4(width is 16 ㎜, and thickness is 0.4 ㎜) the H08A cold-rolled strip.First it is rolled into U-shaped.The granularity of the powder of getting is for can pass through 70 purpose sieves.The various powder of getting are put into mixed powder machine mixed 40 minutes, then mixed-powder is added in the U-shaped H08A cold-rolled steel trough of belt, filling rate is 55%, and U-shaped groove is healed up, and makes the medicinal powder parcel wherein.And then with wire drawing machine by road drawing, tube reducing, make at last its diameter reach 4.0 ㎜, the surfacing layer metal hardness that makes at last is 64-68HRC, wearability is good.
Embodiment 6
With high carbon ferro-chrome, chromium powder, ferro-niobium, NaN
3, BN, molybdenum-iron and rare earth oxide evenly mix according to a certain percentage, so that carbon, chromium, niobium, boron, nitrogen, molybdenum, the shared welding wire percentage by weight of rare earth element are in the medicine core powder: carbon 2.5%, chromium 39%, niobium 2.0%, boron 7.0%, nitrogen 5.0%, molybdenum 2.0%, rare earth 2.5%, surplus are iron or other impurity.Selecting 16 * 0.4(width is 16 ㎜, and thickness is 0.4 ㎜) the H08A cold-rolled strip.First it is rolled into U-shaped.The granularity of the powder of getting is for can pass through 70 purpose sieves.The various powder of getting are put into mixed powder machine mixed 40 minutes, then mixed-powder is added in the U-shaped H08A cold-rolled steel trough of belt, filling rate is 55%, and U-shaped groove is healed up, and makes the medicinal powder parcel wherein.And then with wire drawing machine by road drawing, tube reducing, make at last its diameter reach 4.0 ㎜, the surfacing layer metal hardness that makes at last is 66-68HRC, wearability is good.
Embodiment 7
With high carbon ferro-chrome, chromium powder, ferro-niobium, NaN
3, BN, molybdenum-iron and rare earth oxide evenly mix according to a certain percentage, so that carbon, chromium, niobium, boron, nitrogen, molybdenum, the shared welding wire percentage by weight of rare earth element are in the medicine core powder: carbon 3.0%, chromium 40%, niobium 2.0%, boron 8.0%, nitrogen 5.0%, molybdenum 2.0%, rare earth 2.5%, surplus are iron or other impurity.Selecting 16 * 0.4(width is 16 ㎜, and thickness is 0.4 ㎜) the H08A cold-rolled strip.First it is rolled into U-shaped.The granularity of the powder of getting is for can pass through 70 purpose sieves.The various powder of getting are put into mixed powder machine mixed 40 minutes, then mixed-powder is added in the U-shaped H08A cold-rolled steel trough of belt, filling rate is 55%, and U-shaped groove is healed up, and makes the medicinal powder parcel wherein.And then with wire drawing machine by road drawing, tube reducing, make at last its diameter reach 4.0 ㎜, the surfacing layer metal hardness that makes at last is 60-66HRC, wearability is good.
Claims (2)
1. a nitrogen, boron alloy high-toughness wear-resistant flux-cored wire, crust adopts mild-carbon steel strip, and core filler alloys or mineral dust through being drawn into silk, is characterized in that adding nitrogen, boron compound such as NaN in medicine core pulvis
3With compounds such as BN, built-up welding realizes high nitrogen, boron alloy.
2. chemistry part of described flux-cored wire is calculated as with % by weight according to claim 1: carbon 1.0 ~ 3.0, and chromium 35 ~ 40, niobium 1.0 ~ 2.0, boron 3.0 ~ 8.0, nitrogen 2.0 ~ 5.0, molybdenum 1.0 ~ 2.0, rare earth 1.0 ~ 2.5, surplus is iron or other impurity.
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| CN201210411083.4A CN102886620B (en) | 2012-10-25 | 2012-10-25 | The boron alloyed high-toughness wear-resistant flux-cored wire of a kind of nitrogen |
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| CN105252168A (en) * | 2014-07-16 | 2016-01-20 | 徐工集团工程机械股份有限公司 | Functional-form Fe-based surfacing powder |
| CN105269183A (en) * | 2015-12-01 | 2016-01-27 | 哈尔滨工业大学 | Flux core for nano-modified boron-containing high-chromium iron hardfacing self-protection flux-cored wire |
| CN105643142A (en) * | 2016-04-08 | 2016-06-08 | 苏州捷德瑞精密机械有限公司 | Arc welding electrode additive and preparation method thereof |
| US9475154B2 (en) | 2013-05-30 | 2016-10-25 | Lincoln Global, Inc. | High boron hardfacing electrode |
| CN106112303A (en) * | 2016-07-28 | 2016-11-16 | 江苏科技大学 | A kind of multicomponent nitride Strengthening and Toughening self protection pile-up welding flux core welding wire and preparation method thereof |
| CN106695174A (en) * | 2016-12-14 | 2017-05-24 | 安徽华众焊业有限公司 | Wear-resistant self-protection flux-cored wire and preparation method thereof |
| CN106862800A (en) * | 2017-03-31 | 2017-06-20 | 安徽再制造工程设计中心有限公司 | The built-up welding of steel pipe forming roller, flux cored wire used for submerged arc welding and its welding procedure |
| CN107052621A (en) * | 2016-11-30 | 2017-08-18 | 安徽华众焊业有限公司 | High rigidity self protection pile-up welding flux core welding wire and preparation method thereof |
| CN107138875A (en) * | 2017-06-15 | 2017-09-08 | 燕山大学 | A kind of arc surfacing increasing material manufacturing is with hypereutectic Fe Cr C Ti Nb N flux-cored wires |
| CN107138874A (en) * | 2017-06-15 | 2017-09-08 | 燕山大学 | A kind of arc surfacing increasing material manufacturing is with hypereutectic siderochrome carbon titanium niobium nitrogen lanthanum aluminate flux-cored wire |
| CN109175779A (en) * | 2018-10-23 | 2019-01-11 | 郑州大学 | A kind of bridge steel Q500qE flux-cored wire used for welding |
| CN110760777A (en) * | 2019-11-29 | 2020-02-07 | 国网山东省电力公司电力科学研究院 | Preparation method of zinc-aluminum alloy powder core wire for electric arc spraying |
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| CN113857719A (en) * | 2021-10-25 | 2021-12-31 | 郑州大学 | Flux-cored wire for hardfacing of surface of extrusion roller |
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| CN105269183A (en) * | 2015-12-01 | 2016-01-27 | 哈尔滨工业大学 | Flux core for nano-modified boron-containing high-chromium iron hardfacing self-protection flux-cored wire |
| CN105643142A (en) * | 2016-04-08 | 2016-06-08 | 苏州捷德瑞精密机械有限公司 | Arc welding electrode additive and preparation method thereof |
| CN106112303B (en) * | 2016-07-28 | 2018-04-06 | 江苏科技大学 | A kind of multicomponent nitride Strengthening and Toughening self protection pile-up welding flux core welding wire and preparation method thereof |
| CN106112303A (en) * | 2016-07-28 | 2016-11-16 | 江苏科技大学 | A kind of multicomponent nitride Strengthening and Toughening self protection pile-up welding flux core welding wire and preparation method thereof |
| CN107052621A (en) * | 2016-11-30 | 2017-08-18 | 安徽华众焊业有限公司 | High rigidity self protection pile-up welding flux core welding wire and preparation method thereof |
| CN106695174A (en) * | 2016-12-14 | 2017-05-24 | 安徽华众焊业有限公司 | Wear-resistant self-protection flux-cored wire and preparation method thereof |
| CN106862800A (en) * | 2017-03-31 | 2017-06-20 | 安徽再制造工程设计中心有限公司 | The built-up welding of steel pipe forming roller, flux cored wire used for submerged arc welding and its welding procedure |
| CN107138875A (en) * | 2017-06-15 | 2017-09-08 | 燕山大学 | A kind of arc surfacing increasing material manufacturing is with hypereutectic Fe Cr C Ti Nb N flux-cored wires |
| CN107138874A (en) * | 2017-06-15 | 2017-09-08 | 燕山大学 | A kind of arc surfacing increasing material manufacturing is with hypereutectic siderochrome carbon titanium niobium nitrogen lanthanum aluminate flux-cored wire |
| CN109175779A (en) * | 2018-10-23 | 2019-01-11 | 郑州大学 | A kind of bridge steel Q500qE flux-cored wire used for welding |
| CN110760777A (en) * | 2019-11-29 | 2020-02-07 | 国网山东省电力公司电力科学研究院 | Preparation method of zinc-aluminum alloy powder core wire for electric arc spraying |
| CN113070607A (en) * | 2021-03-12 | 2021-07-06 | 哈尔滨威尔焊接有限责任公司 | Chromium-free high-wear-resistance impact-resistant surfacing flux-cored wire |
| CN113857719A (en) * | 2021-10-25 | 2021-12-31 | 郑州大学 | Flux-cored wire for hardfacing of surface of extrusion roller |
| CN113857719B (en) * | 2021-10-25 | 2022-11-01 | 郑州大学 | Flux-cored wire for hardfacing of surface of extrusion roller |
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Effective date of registration: 20161205 Address after: 412000 Taishan West Road, Tianyuan District, Hunan, No. 88, No. Patentee after: Hunan University of Technology Address before: 412007 School of metallurgical engineering, Hunan University of Technology, 88 West Taishan Road, Tianyuan District, Hunan, Zhuzhou 405, China Patentee before: Yin Ruiming |