CN102848102B - Iron-based abrasion-resistant alloy containing superfine hard phase - Google Patents
Iron-based abrasion-resistant alloy containing superfine hard phase Download PDFInfo
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- CN102848102B CN102848102B CN201210224034.XA CN201210224034A CN102848102B CN 102848102 B CN102848102 B CN 102848102B CN 201210224034 A CN201210224034 A CN 201210224034A CN 102848102 B CN102848102 B CN 102848102B
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Abstract
The invention discloses iron-based abrasion-resistant alloy powder containing a superfine hard phase and belongs to the technical field of welding materials. The powder comprises 15.4-20wt.% of Cr, 2.3-4.8wt.% of B, 0.6-1.8wt.% of C, 5.9-9.8wt.% of W, 1.6-4.5wt.% Nb, 3.4-6.0wt.% of Mo, 0-2.8wt.% of V, 2.0-2.4wt.% of Mn, 1.1-1.5wt.% of Si and the balance Fe. The process for preparing a surfacing alloy comprises the steps of uniformly mixing high carbon ferro-chrome between 75 mu m and 150 mu m, chromium metal powder, ferroboron powder, metal tungsten powder, ferroniobium, ferromolybdenum, ferrovanadium, electrolytic manganese powder, ferrosilicon and metallic iron powder and preparing the surfacing alloy through plasma transferred arc spray welding. The prepared surfacing alloy contains the niobium-containing superfine complex hard phase, the dimension can be submicron, the alloy hardness can reach 68HRC, the alloy toughness is good, no crack is produced during welding, and the alloy has the good abrasion-resistance.
Description
Technical field
The invention belongs to technical field of welding materials, relate to a kind of preparation method containing ultra-fine horniness phase wear-resistant hardfacing alloy powder and hardfacing alloy, reparation and the manufacture of mechanical wearing piece in the industries such as electric power, metallurgy, machinery, chemical industry can be widely used in.
Background technology
Wearing and tearing are the one of the main reasons causing mechanical failure, and wherein abrasive wear accounts for more than 50%.In modern industry and technical development, plant equipment and part thereof are in use more and more higher to the requirement of material wear-resistant damage property, and service life more and more becomes the key factor affecting modern comfort production efficiency.According to statistics, the energy of world industry developed country about 30% consumes in different forms in wearing and tearing, and China consumes metal wear resistant material every year and about reaches more than 3,000,000 tons in recent years, the every profession and trade also part of appliance of import up to 1,000 hundred million dollars successively.
The wearability of hardfacing alloy depends on the size of contained hard phase, form, distribution and type thereof, and toughness is not only relevant to its matrix character, quantity, form and distribution etc., also relevant with the size of hard phase, form, distribution and type.Under a lot of operating mode, the wearability that fine grained hard mutual-assistance alloy has had, in particular cases, when hard phase is harder than abrasive material, increases hard phase size and contributes to wearability raising.It is generally acknowledged if hard phase is tiny or for spherical, the isolate effect of hard phase to metallic matrix reduces, favourable to raising toughness.Hard phase distribution alloy wearability has important impact, and hard phase, as the wear-resisting skeleton of alloy, is uniformly distributed with and helps effectively protect matrix, and the easy stress that produces of the gathering of hard phase growth is concentrated, and adds hard phase peeling off in wear process.
Recent year external iron-based abrasion resistant overlaying-welding alloy aspect has suitable research, but reaction chrome carbide hard phase and easy to crack containing the hardfacing alloy of Boronic compound hard phase, hardness and toughness coupling poor.So tiny hard phase is evenly distributed on matrix, raising hardfacing alloy toughness is played an important role.Therefore, study a kind of surfacing welding alloy containing ultra-fine hard phase, it has the matched well of hardness and toughness, thus significant to raising wearability.
Summary of the invention
The object of the invention is in alloy that ultra-fine hard phase is as wear-resisting skeleton, ultra-fine hard phase size reaches sub-micron, reduces isolating matrix, is conducive to putting forward heavy alloyed toughness, and has higher hardness, substantially increase the wearability of hardfacing alloy.
For achieving the above object, the present invention takes following technical scheme.
A kind of containing ultra-fine hard phase iron(-)base powder, powdered ingredients scope is as follows: Cr:15.4-20wt.%; B:2.3-4.8wt.%; C:0.6-1.8%wt.%; W:5.9-9.8%wt; Nb:1.6-4.5wt.%; Mo:3.4-6.0wt.%; V:0-2.8wt.%; Mn:2.0-2.4wt.%; Si:1.1-1.5wt.%; Fe: surplus.Described powder comprises: high carbon ferro-chrome, crome metal powder, FeB powder, metal tungsten powder, ferro-niobium, molybdenum-iron, vanadium iron, electrolytic manganese powder, ferrosilicon, metal iron powder.The granularity of above-mentioned various powder is between 75-150 μm.
Preferred described alloy powder, alloy powder elemental composition scope is preferably as follows: Cr:18.2-19.6wt.%; B:2.6-3.8wt.%; C:0.8-1.8%wt.%; W:5.9-9.8%wt; Nb:3.4-4.5%wt; Mo:4.2-6.0%wt; V:1.5-2.8%wt; Mn:2.0-2.4%wt; Si:1.1-1.5%wt; Fe: surplus.
Further, each element is added by following alloy powder: high carbon ferro-chrome, crome metal powder, FeB powder, metal tungsten powder, ferro-niobium, molybdenum-iron, vanadium iron, electrolytic manganese powder, ferrosilicon, metal iron powder.
Further, the granularity that above powder is various is between 75-150 μm.
Adopt the above-mentioned alloy powder of the present invention to prepare a kind of method containing ultra-fine hard phase iron-based abrasion resistant overlaying-welding alloy, it is characterized in that, adopt plasma transferred arc to prepare hardfacing alloy technique, welding condition is: untransferable arc voltage 18-21V; Untransferable arc electric current 58-63A: transferred arc voltage: 29-32V; Transferred arc electric current 95-125A; Powder feeding voltage: 4.0-5.5V; Ion-gas: 220-280L/h; Powder feeding gas: 260-340L/h; Protection gas: 360-450L/h; Ion-gas, powder feeding gas and protection gas are argon gas; Surfacing speed: 25-30mm/min; The welding gun amplitude of oscillation: 25-30mm; Spray distance: 10-15mm.Said welding method is optimized, by processing parameter setting is: untransferable arc voltage 19-20V; Untransferable arc electric current: 59-61A; Transferred arc voltage: 29-32V; Transferred arc electric current 99-119A; Powder feeding voltage: 4.0-5.5V; Ion-gas: 220-260L/h; Powder feeding gas: 280-320L/h; Protection gas: 380-420L/h; Ion-gas, powder feeding gas and protection gas are argon gas; Surfacing speed: 25-30mm/min; The welding gun amplitude of oscillation: 25-30mm; Spray distance: 10-15mm.
Adopt the hardfacing alloy that this alloy powder is prepared under above-mentioned process conditions, tiny hard phase size containing niobium complexity can reach sub-micron, even dispersion is distributed among matrix, as the main wear-resisting skeleton of alloy, contribute to improving alloy ductility, and matrix is tiny, alloy has good wearability.
Main feature of the present invention is by multicomponent alloy thinning microstructure, the ultra-fine hard phase containing niobium complexity is had in tissue, submicron-scale can be reached, solution strengthening and the hard mutual-assistance alloy of multiple element have higher hardness, and hardness can reach 68HRC, and ultra-fine hard phase even dispersion is distributed on matrix as main wear-resisting skeleton, reduce hard phase and effect is isolated to matrix, there is good toughness, weld and flawless generation in wear process, thus tool has good wearability.
Accompanying drawing explanation
Fig. 1 example 2 micro-organization chart;
Fig. 2 example 5 micro-organization chart;
Fig. 3 example 2 hardfacing alloy XRD schemes;
Fig. 4 example 5 hardfacing alloy XRD schemes
Fig. 5 example 1-6 hardfacing alloy relative wear resistance Changing Pattern.
Detailed description of the invention
Flux-cored wire of the present invention is not by the restriction of above-mentioned example, and the improvement in any scope claimed at claims of the present invention and change are all within protection scope of the present invention.
High carbon ferro-chrome, crome metal powder, FeB powder, metal tungsten powder, ferro-niobium, molybdenum-iron, vanadium iron, electrolytic manganese powder, ferrosilicon, metal iron powder is selected to make medicinal powder, get the granularity of powder between 75 μm-150 μm, got various powder are put into mixed powder machine and mix.
Embodiment 1. 1 kinds is containing ultra-fine hard phase iron-base wear-resistant alloy powder, and each elemental composition scope is as follows: Cr:15.5%; B:2.7wt.%; C:0.7%; W:5.9%wt; Nb:1.6wt.%; Mo:3.4wt.%; V:0wt.%; Mn:2.0wt.%; Si:1.1wt.%; Fe: surplus.Adopt plasma transferred arc surfacing to carry out built-up welding, weld all non-argon gas of protection gas, ion-gas and powder feeding gas used, concrete technology parameter is: untransferable arc voltage 18V; Untransferable arc electric current: 58A; Transferred arc voltage: 29V; Transferred arc electric current: 99A; Powder feeding voltage: 4.5V; Ion-gas: 220L/h; Powder feeding gas: 270L/h; Protection gas: 360L/h; Surfacing speed: 25mm/min; The welding gun amplitude of oscillation: 25mm; Spray distance: 12mm.
Embodiment 2. 1 kinds is containing ultra-fine hard phase iron-base wear-resistant alloy powder, and each elemental composition scope is as follows: Cr:19.6wt.%; B:3.8wt.%; C:0.9%wt.%; W:6.2%wt; Nb:3.8wt.%; Mo:4.8wt.%; V:0wt.%; Mn:2.2wt.%; Si:1.2wt.%; Fe: surplus.Adopt plasma transferred arc surfacing to carry out built-up welding, weld all non-argon gas of protection gas, ion-gas and powder feeding gas used, concrete technology parameter is: untransferable arc voltage 21V; Untransferable arc electric current: 62A; Transferred arc voltage: 32V; Transferred arc electric current: 105A; Powder feeding voltage: 5.0V; Ion-gas: 240L/h; Powder feeding gas: 300L/h; Protection gas: 400L/h; Surfacing speed: 30mm/min; The welding gun amplitude of oscillation: 25mm; Spray distance: 13mm.
Embodiment 3. 1 kinds is containing ultra-fine hard phase iron-base wear-resistant alloy powder, and each elemental composition scope is as follows: Cr:20wt.%; B:4.4wt.%; C:1.8%wt.%; W:9.8%wt; Nb:4.5wt.%; Mo:6.0wt.%; V:2.8wt.%; Mn:2.4wt.%; Si:1.5wt.%; Fe: surplus.Adopt plasma transferred arc surfacing to carry out built-up welding, weld all non-argon gas of protection gas, ion-gas and powder feeding gas used, concrete technology parameter is: untransferable arc voltage 21V; Untransferable arc electric current: 63A; Transferred arc voltage 32V; Transferred arc electric current: 120A; Powder feeding voltage: 5.5V; Ion-gas: 280L/h; Powder feeding gas: 340L/h; Protection gas: 450L/h; Surfacing speed: 30mm/min; The welding gun amplitude of oscillation: 30mm; Spray distance: 14mm.
Embodiment 4. 1 kinds is containing ultra-fine hard phase iron-base wear-resistant alloy powder, and powdered ingredients scope is as follows, and each elemental composition scope is as follows: Cr:18.3wt.%; B:2.6wt.%; C:0.8%wt.%; W:5.9%wt; Nb:3.4%wt; Mo:4.2%wt; V:1.5%wt; Mn:2.0%wt; Si:1.1%wt; Fe: surplus.Adopt plasma transferred arc surfacing to carry out built-up welding, weld all non-argon gas of protection gas, ion-gas and powder feeding gas used, concrete technology parameter is: untransferable arc voltage 18V; Untransferable arc electric current: 59A; Transferred arc voltage: 30V; Transferred arc electric current: 99V; Powder feeding voltage: 4.0V; Ion-gas: 220L/h; Powder feeding gas: 280L/h; Protection gas: 380L/h; Surfacing speed: 30mm/min; The welding gun amplitude of oscillation: 25mm; Spray distance: 13mm.
Embodiment 5. 1 kinds is containing alloy powder such as ultra-fine hard phase iron-based wear-resisting grade, and powdered elemental composition range is as follows: Cr:19.4wt.%; B:3.4wt.%; C:1.3%wt.%; W:7.8%wt; Nb:4.2%wt; Mo:4.8%wt; V:2.4%wt; Mn:2.2%wt; Si:1.4%wt; Fe: surplus.Adopt plasma transferred arc surfacing to carry out built-up welding, weld all non-argon gas of protection gas, ion-gas and powder feeding gas used, concrete technology parameter is: untransferable arc voltage 21V; Untransferable arc electric current: 63A; Transferred arc voltage: 29V; Transferred arc electric current: 115A; Powder feeding voltage: 5.0V; Ion-gas: 240L/h; Powder feeding gas: 300L/h; Protection gas: 400L/h; Surfacing speed: 30mm/min; The welding gun amplitude of oscillation: 30mm; Spray distance: 13mm.
Embodiment 6. 1 kinds is containing ultra-fine hard phase iron-base wear-resistant alloy powder, and powdered ingredients scope is as follows, and powdered ingredients scope is as follows: Cr:19.6wt.%; B:3.8wt.%; C:1.8%wt.%; W:9.8%wt; Nb:4.5%wt; Mo:6.0%wt; V:2.8%wt; Mn:2.4%wt; Si:1.5%wt; Fe: surplus.Adopt plasma transferred arc surfacing to carry out built-up welding, weld all non-argon gas of protection gas, ion-gas and powder feeding gas used, concrete technology parameter is: untransferable arc voltage 20V; Untransferable arc electric current: 60A; Transferred arc voltage: 31V; Transferred arc electric current: 115A; Powder feeding voltage: 5.5V; Ion-gas: 260L/h; Powder feeding gas: 320L/h; Protection gas: 420L/h; Surfacing speed: 25mm/min; The welding gun amplitude of oscillation: 30mm; Spray distance: 14mm.
Wherein with embodiment 2,5 organize best.Prepared by each embodiment, hardfacing alloy Performance Detection is as described below:
1. pair example hardfacing alloy deposited metal adopts HR ~ 150A Rockwell hardness machine to carry out hardness test, and load is 150Kg, averages after making a call to five points, as shown in table 1.
Table 1 each embodiment hardfacing alloy deposited metal hardness number (HRC)
2. prepared by pair example, hardfacing alloy carries out wear-resistant experiment, adopts the wheeled grain-abrasion testing machine of MLS-225 type damp sand rubber to carry out.Wear specimens is of a size of 57 × 25.5 × 6mm, and test parameters is as follows: rubber wheel rotating speed: 240r/min; Rubber wheel diameter: 178mm; Rubber wheel hardness: 60 (continue that hardness); Load 100N; Rubber wheel revolution: pre-grinding 1000 turns, fine grinding 3000 turns, abrasive material: granularity 40-70 order quartz sand.The weight loss of material wear-resistant performance wearing and tearing is weighed.On pretreatment, after, sample is put into the beaker filling acetone soln, in ultrasonic washing instrument, clean 3-5 minute, with 45 hardened steel sample as a comparison in experiment, the ratio of contrast piece weight loss and measuring piece weight loss is as the relative wear resistance of this formula.
example 1-6 hardfacing alloy relative wear resistance Changing Pattern experimental result is as Fig. 5.
Claims (6)
1., containing a ultra-fine hard phase iron-base wear-resistant alloy, it is characterized in that, each elemental composition scope is as follows: Cr:15.4-20wt.%; B:2.3-4.4wt.%; C:0.6-1.8%wt.%; W:5.9-9.8%wt; Nb:1.6-4.5wt.%; Mo:3.4-6.0wt.%; V:0-2.8wt.%; Mn:2.0-2.4wt.%; Si:1.1-1.5wt.%; Fe: surplus.
2. according to claim 1 containing ultra-fine hard phase iron-base wear-resistant alloy, it is characterized in that, each elemental composition scope is as follows: Cr:18.2-19.6wt.%; B:2.6-3.8wt.%; C:0.8-1.8%wt.%; W:5.9-9.8%wt; Nb:3.4-4.5%wt; Mo:4.2-6.0%wt; V:1.5-2.8%wt; Mn:2.0-2.4%wt; Si:1.1-1.5%wt; Fe: surplus.
3. according to claim 1 or 2 containing ultra-fine hard phase iron-base wear-resistant alloy, it is characterized in that, each element is added by following alloy powder: high carbon ferro-chrome, crome metal powder, FeB powder, metal tungsten powder, ferro-niobium, molybdenum-iron, vanadium iron, electrolytic manganese powder, ferrosilicon, metal iron powder.
4. according to claim 3 containing ultra-fine hard phase iron-base wear-resistant alloy, it is characterized in that the various granularity of above powder is between 75-150 μm.
5. the preparation method containing ultra-fine hard phase iron-base wear-resistant alloy as claimed in claim 1, is characterized in that, adopts plasma transferred arc surfacing to prepare hardfacing alloy technological parameter and is: untransferable arc voltage 18-21V; Untransferable arc electric current 58-63A: transferred arc voltage: 29-32V; Transferred arc electric current 95-125A; Powder feeding voltage: 4.0-5.5V; Ion-gas: 220-280L/h; Powder feeding gas: 260-340L/h; Protection gas: 360-450L/h; Ion-gas, powder feeding gas and protection gas are argon gas; Surfacing speed: 25-30mm/min; The welding gun amplitude of oscillation: 25-30mm; Spray distance: 10-15mm.
6. method according to claim 5, is characterized in that, adopts plasma transferred arc surfacing to prepare hardfacing alloy technological parameter to be: untransferable arc voltage 19-20V; Untransferable arc electric current: 59-61A; Transferred arc voltage: 29-32V; Transferred arc electric current 99-119A; Powder feeding voltage: 4.0-5.5V; Ion-gas: 220-260L/h; Powder feeding gas: 280-320L/h; Protection gas: 380-420L/h; Ion-gas, powder feeding gas and protection gas are argon gas; Surfacing speed: 25-30mm/min; The welding gun amplitude of oscillation: 25-30mm; Spray distance: 10-15mm.
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| CN103949794A (en) * | 2014-04-10 | 2014-07-30 | 北京工业大学 | Iron base hardfacing flux-cored wire containing superfine carbide hard phase |
| AU2015258806B2 (en) * | 2014-05-16 | 2019-05-16 | The Nanosteel Company, Inc. | Layered construction of metallic materials |
| CN105312752B (en) * | 2015-11-10 | 2018-01-12 | 中国石油集团渤海钻探工程有限公司 | A kind of iron-based amorphous coating and preparation method thereof |
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| CN101053931A (en) * | 2007-05-23 | 2007-10-17 | 山东大学 | Alloy powder block used for built-up welding |
| CN101421073A (en) * | 2006-02-16 | 2009-04-29 | 司多迪公司 | Hard-facing alloys having improved crack resistance |
| CN101602152A (en) * | 2009-07-23 | 2009-12-16 | 王祖胜 | The flux-cored wire that is used for concrete pump S pipe valve, cheater plate and wear ring |
| CN102407412A (en) * | 2011-09-01 | 2012-04-11 | 北京工业大学 | Particle-reinforced nickel titanium based wear-resistant surfacing layer and preparation method thereof |
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| JPS56112446A (en) * | 1980-02-07 | 1981-09-04 | Mitsubishi Metal Corp | Fe alloy with superior molten zinc erosion resistance |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101421073A (en) * | 2006-02-16 | 2009-04-29 | 司多迪公司 | Hard-facing alloys having improved crack resistance |
| CN101053931A (en) * | 2007-05-23 | 2007-10-17 | 山东大学 | Alloy powder block used for built-up welding |
| CN101602152A (en) * | 2009-07-23 | 2009-12-16 | 王祖胜 | The flux-cored wire that is used for concrete pump S pipe valve, cheater plate and wear ring |
| CN102407412A (en) * | 2011-09-01 | 2012-04-11 | 北京工业大学 | Particle-reinforced nickel titanium based wear-resistant surfacing layer and preparation method thereof |
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