CN109807494A - A kind of composite powder for AZ91D mg-based material surface overlaying - Google Patents
A kind of composite powder for AZ91D mg-based material surface overlaying Download PDFInfo
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- CN109807494A CN109807494A CN201811512276.2A CN201811512276A CN109807494A CN 109807494 A CN109807494 A CN 109807494A CN 201811512276 A CN201811512276 A CN 201811512276A CN 109807494 A CN109807494 A CN 109807494A
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Abstract
The invention discloses a kind of composite powders that a kind of pair of mg-based material surface carries out built-up welding working process, the composite powder of its wear-resisting property is handled and improved specific to AZ91D mg-based material surface overlaying, its main feature is that significantly improving wear-resistant, corrosion-resistant, the high-temperature erosion-resistant performance of AZ91D mg-based material under the premise of ensureing completion plasma surface bead-welding technology.The characteristics of this alloy powder material is that rare earth elements europium (Eu) or yttrium (Y) are added in conventional alloys powder to promote to be formed compound between novel nano laminated metal, so that composite material surface abrasion resistance properties improve 35% or so after plasma surfacing, overlay cladding is smooth and uniform simultaneously and stomata and crackle does not occur, substantially extends AZ91D magnesium-based composite material parts wear period and service life.
Description
Technical field
The present invention relates to a kind of composite powders that metal surface carries out built-up welding working process, and in particular to AZ91D magnesium substrates
Expect the alloy composite powder of surface plasma built-up welding.
Background technique
AZ91 mg-based material is since small with density, thermal expansion coefficient is low, specific stiffness and specific strength height etc. are many excellent
Performance all achieves successful application in terms of optical precision instrument, body of a motor car and engine, aerospace vehicle.
However AZ91 magnesium-based composite material itself also suffers from certain drawbacks and deficiency, AZ91 magnesium alloy substrate hardness is lower, friction is
Number is high, is easy to pull and be difficult to lubricate that it is caused to wear no resistance.Make a general survey of metal material field, the consumption of metal material, failure
One of the main reasons is exactly to wear.It counts according to related data, is directly or indirectly lost by the economic loss caused by wearing every year
Hundreds billion of members are reached.Therefore the wear-resisting property for improving AZ91 magnesium-based composite material component is to expand AZ91 magnesium-based composite material
One vital task of components application field and bottleneck problem urgently to be resolved.
In order to improve the wear resistance of metal material, numerous scientific research personnel have done a large amount of work, and retrieval is close
Year surface working process technology mainly has with material: (1) Nanjing Aero-Space University's Materials Academy in 2016 publishes thesis " carburizing
Influence of the temperature to Ti2AlNb alloy friction and wear behavior ", different carburizing temperatures are studied to Ti2AlNb alloy microstructure, aobvious
The influence of microhardness and friction and wear behavior.(2) 2012 years Nanchang University of aviation publish thesis, and " three-dimensional nickel screen enhances aluminum-base composite
Material friction wear properties research ", research shows that the wearability of three-dimensional nickel screen reinforced aluminum matrix composites is better than matrix alloy, and
Increase with load, revolving speed increases, wearing- in period extension and the increase of network pore degree, wearability raising are more obvious.(3)2016
Field operation engineering college, year liberation army Polytechnics publish thesis " laser melting coating TiB2 particle enhanced nickel base Alloy Composite Coating it is micro-
See tissue and tribological Properties ", TiB2 particle enhanced nickel base Alloy Composite Coating is had studied in dry friction and Seawater
In friction and wear behavior and mechanism.(4) 2013 years Shandong University's patents, Publication No.: CN101566271B, a kind of metal pottery
Porcelain composite abrasion resistance material and preparation method thereof.It is asked although the above technology and dusty material temporarily solve some material wear-resistants
Topic, but it still has significant limitation, in particular for solving the problems, such as that improving AZ91 magnesium-based composite material wearability is still not suitable for,
Such as using conventional alloys dusty material to AZ91 magnesium-based composite material carry out surface working process, can generate coating easily peels off with
Coating and matrix junction crack or the defects of stomatas, seriously affect the wear-resisting property of component entirety.
To solve this problem, abandoning tradition alloy powder composition proportion of the present invention, and conjunctive use adds two rare earth members
Element: europium (Eu) or yttrium (Y) form the toughness rare-earth phase of a large amount of novel nano stratiform europiums and yttrium in overlay cladding, while promoting heap
Layer tissue crystal grain refinement, nodularization and Dispersed precipitate occur for part Zr3AlC2 ceramic enhancement phase, firmly crisp so as to improve overlay cladding
Property, greatly improve the anti-cold crack performance of AZ91 magnesium-based composite material component.Furthermore.The present invention, which advanced optimizes, improves plasma heap
The component proportion for welding powder metallurgy, realizes the plasma surfacing technique of AZ91 magnesium-based composite material surface high abrasion anti-cracking.
Summary of the invention
Goal of the invention: to overcome the shortcomings of the above technology, the present invention proposes higher a kind of hardness, high temperature resistant, corrosion-resistant, resistance to
It washes away wear-resisting with superior function, is suitble to the dedicated acid bronze alloy of AZ91 magnesium-based composite material surface plasma built-up welding compound
Powder.
The technical solution that the present invention provides first is that: a kind of composite powder for AZ91D mg-based material surface overlaying, institute
State the component that composite powder includes following mass percent: 1.0%≤B≤2.0%；Y:0.1%~0.5%；Al:6.0%~
8.2%；Zr:2.1%~3.2%；C:1.2%~1.8%；Zn:0.6%~1.5%；Mn:0.9%~1.5%；Si:1.6%
~2.6%；Fe:1%；Cu: surplus.Wherein, it is 50~210 mesh, heap after Plasma Welding that composite powder, which uses granularity, when built-up welding
The hardness 30~40 of layer.
The technical solution that the present invention provides second is that: a kind of composite powder for AZ91D mg-based material surface overlaying,
The composite powder includes the component of following mass percent: 0.1% < B < 1.0%；Eu2O3: 0.2%~0.8%；Al:6.2%
~8.9%；Zr:2.1%~3.2%；C:1.2%~1.8%；Zn:0.6%~1.5%；Mn:0.9%~1.5%；Si:
1.6%~2.6%；Fe:0.5%；Cu: surplus.Wherein, composite powder uses granularity: 70~230 mesh when built-up welding；Plasma welding
Connect the hardness 35~45 of rear overlay cladding.
The technical solution that the present invention provides third is that: a kind of composite powder for AZ91D mg-based material surface overlaying, institute
State the component that composite powder includes following mass percent: 2.0%≤B < 2.5%；Eu2O3: 0.2%~0.8%；Y:0.1~
0.5；Al:5.2%~6.9%；Zr:2.1%~3.2%；C:1.2%~1.8%；Zn:0.6%~1.5%；Mn:0.9%~
1.5%；Si:1.6%~2.6%；Fe:0.5%~1%；Cu: surplus.Wherein, when built-up welding composite powder use granularity: 80~
260 mesh, hardness HRC40~45 of overlay cladding after Plasma Welding.
The preparation method of above-mentioned powder is very simple, directly that raw material powder is uniform according to above-mentioned powdered ingredients proportion requirement
Mixing sieving.
Bead-welding technology parameter are as follows: welding gun height: 9-11mm；Minor arc electric current: 100-110A；Back ground current: 25-30A；
Turntable revolving speed: 0.10-0.12 (control box show value)；Powder feeding motor: 48V (zero load) 32V (load)；Ion-gas flow: 0.3-
0.35m3/h；Protection air-flow amount: 0.2-0.4m3/h；Powder feeding throughput: 0.26-0.35m3/h；Amplitude of fluctuation: 4.5mm；Swing frequency
Rate: 4Hz；Swing the residence time a: the left side=right side=1.4-1.8s.
Compared with prior art, the invention has the characteristics that rare earth elements europium (Eu) and yttrium are added in conventional alloys powder
(Y), by adjusting the component ratio of alloy powder, high anti-cracking, high abrasion, corrosion-resistant and high-temperature erosion-resistant alloyed powder are obtained
End, the dusty material are more suitable for the plasma surfacing on AZ91D mg-based material surface, and postwelding overlay surface is smooth and uniform, heap
Layer hardness HRC reaches 36-42, and high quality completes bead-welding technology quality requirement, realizes and requires as shown in Figure 1: through x-ray inspection,
Stomata and cracking breakout are far smaller than conventional powder, and high quality is fully achieved and promotes AZ91D mg-based material surface abrasion resistance, has
Effect extends wear-out period and the service life of AZ91D mg-based material component, is a kind of wide new plasma heap of commercial promise
Weld composite powder material.
Detailed description of the invention
Fig. 1 novel powder and conventional powder plasma surfacing AZ91D magnesium-based plate comparison diagram piece: it (a) is prepared for embodiment 1
Novel powder result；It (b) is conventional powder result (without europium and yttrium).
Specific embodiment
Embodiment 1
The test of plasma surfacing processing technology, alloy powder material each group are carried out to SiC/AZ91 magnesium-based composite material surface
Sub-prime amount fractions are as follows: B:2.0%；Y:0.1%；Al:6.0%；Zr:2.1%%；C:1.2%；Zn:0.6%；Mn:
0.9%；Si:1.6%；Fe:1%；Cu: surplus；Built-up welding powder uses granularity: 50 mesh.
Its technological parameter are as follows: welding gun height: 9mm；Minor arc electric current: 100A；Back ground current: 25A；Turntable revolving speed: 0.10 (control
Box show value processed)；Powder feeding motor: 48V (zero load) 32V (load)；Ion-gas flow: 0.30m3/h；Protection air-flow amount: 0.2m3/
h；Powder feeding throughput: 0.26m3/h；Amplitude of fluctuation: 4.5mm；Hunting frequency: 4Hz；Swing the residence time a: the left side=right side=1.4s.
Test result: as shown in Fig. 1 (a), AZ91 magnesium-based composite material hardfacing weld deposit thickness is about 3.2mm, appearance compared with
It gets well, always body formed to meet the requirements, overlay cladding measured hardness HRC:38.25, x-ray inspection after turnery processing does not occur stomata, splits
Line；This welding conditions meets surfacing requirement, and actual welding can refer to, and effect is significantly better than conventional powder plasma surfacing effect
(shown in such as Fig. 1 (b)).
Embodiment 2
The test of plasma surfacing processing technology is carried out to Si3N4/AZ91 magnesium-based composite material surface, alloy powder material is each
Constituent mass fractions are as follows: B:1.0%；Eu2O3: 0.8%；Al:8.9%；Zr:3.2%；C:1.8%；Zn:1.5%；
Mn:1.5%；Si:2.6%；Fe:0.5%；Cu: surplus；Built-up welding powder uses granularity: 230 mesh.
Its technological parameter are as follows: welding gun height: 10mm；Minor arc electric current: 105A；Back ground current: 28A；Turntable revolving speed: 0.11
(control box show value)；Powder feeding motor: 48V (zero load) 32V (load)；Ion-gas flow: 0.35m3/h；Protection air-flow amount:
0.3m3/h；Powder feeding throughput: 0.30m3/h；Amplitude of fluctuation: 4.5mm；Hunting frequency: 4Hz；Swing the residence time: left=right=
1.6s。
Test result: SiC/AZ91 magnesium-based composite material hardfacing weld deposit thickness is about 3.3mm, and appearance is preferable, it is overall at
Type meets the requirements, overlay cladding measured hardness HRC:39.89, and x-ray inspection after turnery processing does not occur stomata, crackle；This welding
Specification meets surfacing requirement, and actual welding can refer to.
Embodiment 3
The test of plasma surfacing processing technology, alloy powder material each group are carried out to AlN/AZ91 magnesium-based composite material surface
Sub-prime amount fractions are as follows: B:2.5%；Eu2O3:0.2%；Y:0.5；Al:6.9%；Zr:3.2%；C:1.2%；Zn:
0.6%；Mn:0.9%；Si:1.6%；Fe:1%；Cu: surplus；Built-up welding powder uses granularity: 260 mesh.
Its technological parameter are as follows: welding gun height: 11mm；Minor arc electric current: 110A；Back ground current: 30A；Turntable revolving speed: 0.12
(control box show value)；Powder feeding motor: 48V (zero load) 32V (load)；Ion-gas flow: 0.35m3/h；Protection air-flow amount:
0.4m3/h；Powder feeding throughput: 0.35m3/h；Amplitude of fluctuation: 4.5mm；Hunting frequency: 4Hz；Swing the residence time: left=right=
1.8s。
Test result: AlN/AZ91 magnesium-based composite material hardfacing weld deposit thickness is about 3.4mm, and appearance is preferable, it is overall at
Type meets the requirements, overlay cladding measured hardness HRC:42.88, and x-ray inspection after turnery processing does not occur stomata, crackle；This welding
Specification meets surfacing requirement, and actual welding can refer to.
Claims (8)
1. a kind of composite powder for AZ91D mg-based material surface overlaying, which is characterized in that the composite powder includes as follows
The component of mass percent: 1.0%≤B≤2.0%；Y:0.1%~0.5%；Al:6.0%~8.2%；Zr:2.1%~
3.2%；C:1.2%~1.8%；Zn:0.6%~1.5%；Mn:0.9%~1.5%；Si:1.6%~2.6%；Fe:1%；
Cu: surplus.
2. the composite powder according to claim 1 for the surface overlaying of AZ91D mg-based material, which is characterized in that built-up welding
When composite powder using granularity be 50~210 mesh.
3. a kind of composite powder for AZ91D mg-based material surface overlaying, which is characterized in that the composite powder includes as follows
The component of mass percent: 0.1% < B < 1.0%；Eu2O3: 0.2%~0.8%；Al:6.2%~8.9%；Zr:2.1%~
3.2%；C:1.2%~1.8%；Zn:0.6%~1.5%；Mn:0.9%~1.5%；Si:1.6%~2.6%；Fe:
0.5%；Cu: surplus.
4. the composite powder according to claim 3 for the surface overlaying of AZ91D mg-based material, which is characterized in that built-up welding
When composite powder use granularity: 70~230 mesh.
5. a kind of composite powder for AZ91D mg-based material surface overlaying, which is characterized in that the composite powder includes as follows
The component of mass percent: 2.0%≤B < 2.5%；Eu2O3: 0.2%~0.8%；Y:0.1~0.5；Al:5.2%~6.9%；
Zr:2.1%~3.2%；C:1.2%~1.8%；Zn:0.6%~1.5%；Mn:0.9%~1.5%；Si:1.6%~
2.6%；Fe:0.5%~1%；Cu: surplus.
6. the composite powder according to claim 5 for the surface overlaying of AZ91D mg-based material, which is characterized in that built-up welding
When composite powder use granularity: 80~260 mesh.
7. the preparation method described in claim 1 or 3 or 5 for the composite powder of AZ91D mg-based material surface overlaying, special
Sign is, raw material powder is directly uniformly mixed to sieving according to above-mentioned powdered ingredients proportion requirement.
8. the composite powder described in claim 1 or 3 or 5 for the surface overlaying of AZ91D mg-based material is in AZ91D mg-based material
Application in surface overlaying, wherein bead-welding technology parameter are as follows: welding gun height: 9-11mm；Minor arc electric current: 100-110A；Arc maintenance
Electric current: 25-30A；Turntable revolving speed: 0.10-0.12；Powder feeding motor: unloaded 48V loads 32V；Ion-gas flow: 0.3-
0.35m3/h；Protection air-flow amount: 0.2-0.4m3/h；Powder feeding throughput: 0.26-0.35m3/h；Amplitude of fluctuation: 4.5mm；Swing frequency
Rate: 4Hz；Swing the residence time a: the left side=right side=1.4-1.8s.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112958635A (en) * | 2021-03-29 | 2021-06-15 | 浙江一铭机车部件有限公司 | Production process of engine connecting rod bushing and early wear analysis and evaluation method thereof |
Citations (4)
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|---|---|---|---|---|
| JPH08174272A (en) * | 1994-12-21 | 1996-07-09 | Mitsui Mining & Smelting Co Ltd | Copper base alloy powder for head facing |
| CN1143685A (en) * | 1995-02-17 | 1997-02-26 | 丰田自动车株式会社 | Wear-resisting copper base alloy |
| CN1930315A (en) * | 2004-03-15 | 2007-03-14 | 丰田自动车株式会社 | Build-up wear-resistant copper-based alloy |
| CN103659050A (en) * | 2013-12-18 | 2014-03-26 | 江苏科技大学 | Crack-resistant and highly abrasion-resistant powder material for plasma spray welding of three-eccentric center butterfly valve |
-
2018
- 2018-12-11 CN CN201811512276.2A patent/CN109807494B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08174272A (en) * | 1994-12-21 | 1996-07-09 | Mitsui Mining & Smelting Co Ltd | Copper base alloy powder for head facing |
| CN1143685A (en) * | 1995-02-17 | 1997-02-26 | 丰田自动车株式会社 | Wear-resisting copper base alloy |
| CN1930315A (en) * | 2004-03-15 | 2007-03-14 | 丰田自动车株式会社 | Build-up wear-resistant copper-based alloy |
| CN103659050A (en) * | 2013-12-18 | 2014-03-26 | 江苏科技大学 | Crack-resistant and highly abrasion-resistant powder material for plasma spray welding of three-eccentric center butterfly valve |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112958635A (en) * | 2021-03-29 | 2021-06-15 | 浙江一铭机车部件有限公司 | Production process of engine connecting rod bushing and early wear analysis and evaluation method thereof |
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Application publication date: 20190528 Assignee: Center for technology transfer Jiangsu University of Science and Technology Assignor: JIANGSU University OF SCIENCE AND TECHNOLOGY Contract record no.: X2021980006173 Denomination of invention: A composite powder for surface surfacing of AZ91D magnesium matrix material Granted publication date: 20210105 License type: Common License Record date: 20210714 |
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