CN103128421A - Preparation method for iron-based amorphous/nanocrystalline composite coatings - Google Patents
Preparation method for iron-based amorphous/nanocrystalline composite coatings Download PDFInfo
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- CN103128421A CN103128421A CN2013100819174A CN201310081917A CN103128421A CN 103128421 A CN103128421 A CN 103128421A CN 2013100819174 A CN2013100819174 A CN 2013100819174A CN 201310081917 A CN201310081917 A CN 201310081917A CN 103128421 A CN103128421 A CN 103128421A
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Abstract
The invention relates to a preparation method for iron-based amorphous/nanocrystalline composite coatings. The method includes: (1) preparing iron-based amorphous surfacing electrodes: core wires are made of Fe41Co7Cr15Mo14C15B6Y2 (by atomic percentage) iron-based amorphous alloy with the diameter of 2-5mm, the coverings are low-hydrogen-and-sodium, and the quality factor K<b> of the coverings is 0.6; (2) carrying out surfacing on the surface of Q235 steel with a manual arc surfacing method, wherein the technological parameters of the surfacing are as follows: direct current reverse polarity is used, the welding voltage U is 20-30V, the welding current is 40-100A, the welding speed is 5-12.0mm/s, the argon flow is 16-25L/min, and then the iron-based amorphous/nanocrystalline composite coatings are obtained. The method is reliable in principle and convenient to operate. The optimal technological parameters are obtained through exploration, and the iron-based amorphous/nanocrystalline composite coatings prepared with the manual arc surfacing method have good heat stability.
Description
Technical field
The present invention relates to a kind of Fe-based amorphous/preparation method of nanocrystalline composite coating, have good heat endurance, belong to material preparation method field.
Background technology
There are not the defectives such as crystal boundary, segregation and precipitate of crystalline material in amorphous alloy because shortrange order, the long-range of its atomic arrangement are unordered, shows isotropism.This structures shape it have the not available excellent properties of many crystalline state metals, as high rigidity, high strength and excellent wear-resisting, decay resistance etc.But non-crystaline amorphous metal has limited its scope of application because of the thermal stability problems in the metastable state on its structure and thermodynamics and use.Fe-based amorphous alloy not only has higher amorphous formation ability and cost performance, reasonably can also obtain the amorphous/nanocrystalline composite coating under bead-welding technology, and then keep good wear and corrosion behavior, is more suitable for as the surface protection coating materials'use.Performance advantage from Fe-based amorphous alloy, non-crystaline amorphous metal and Modern Surface Engineering-technique for overlaying are combined, preparation has the amorphous/nanocrystalline composite coating of good wear-corrosion resistance, and the reliability that making again of parts repaired, improved the surface of the work performance, improves part, increasing the service life has important practical value.But non-equilibrium on the metastable structure of non-crystaline amorphous metal and its thermodynamics, when causing built-up welding, crystallization can occur in overlay cladding.How to control the amorphous/nanocrystalline composite coating of bead-welding technology gain of parameter optimum performance, become the problem of being badly in need of solution.
At present, heat spraying method is being used widely aspect preparation amorphous/nanocrystalline composite coating, but also exist hot-spraying coating and substrate combinating strength low, coating is thin, the deficiencies such as hole.The amorphous formation ability that Fe-based amorphous alloy is stronger, heat endurance and solderability make and utilize overlaying method to prepare the amorphous/nanocrystalline composite coating to become a reality.Built-up welding has easy and simple to handle, deposited area is large, the advantages such as efficient is high, excellent surface quality, is more suitable for the preparation method as Fe-based amorphous/nanocrystalline composite coating.
Summary of the invention
The object of the present invention is to provide a kind of Fe-based amorphous/preparation method of nanocrystalline composite coating, the method principle is reliable, easy and simple to handle, obtain best bead-welding technology parameter by exploration, adopt the preparation of manual electric arc pile up welding method Fe-based amorphous/nanocrystalline composite coating, have good heat endurance.
For reaching above technical purpose, the invention provides following technical scheme.
A kind of Fe-based amorphous/preparation method of nanocrystalline composite coating, following steps successively:
1) prepare Fe-based amorphous surfacing welding: its core wire is the Fe of diameter 2～5mm
41Co
7Cr
15Mo
14C
15B
6Y
2(atomic percentage) Fe-based amorphous alloy, its coating adopts low hydorgew sodium type, coating quality coefficient K
b=0.6, described coating is made of in mass ratio following component: marble 40～48%, fluorite 20～30%, titanium dioxide 2～5%, soda ash 0～2%, mid-carbon fe-mn 3～8%, ferrotianium 8～15%, 45 ferrosilicon 2～5%, quartzy 3～10%;
2) adopt the manual electric arc pile up welding method to carry out built-up welding on Q235 steel surface, adopt following bead-welding technology parameter: dc reverse connection, weldingvoltage U=20～30V, welding current I=40～100A, speed of welding 5～12.0mm/s, argon flow amount 16～25L/min obtains Fe-based amorphous/nanocrystalline composite coating.
The described the 1st) preparation of the Fe-based amorphous surfacing welding of step, detailed process is as follows: with Fe
41Co
7Cr
15Mo
14C
15B
6Y
2(atomic percentage) Fe-based amorphous alloy is as core wire, the polishing alignment; With each component powder of described coating sieve be dry mixed evenly after, add the binding agent of medicinal powder quality 16～20% to mix, the Baume degrees of described binding agent sodium silicate is 42.5, send in extrusion press coating is wrapped on core wire, then carry out 60～150 ℃ of low temperature dryings, 350～380 ℃ of hyperthermia dryings.
Utilize X-ray diffraction peak width method and Scherrer formula to calculate respectively content of amorphous and the nanocrystalline size of Fe-based amorphous/nanocrystalline composite coating.(DSC) carries out THERMAL STABILITY to Fe-based amorphous/nanocrystalline composite coating with differential scanning calorimetry.
Compared with prior art, the invention has the advantages that: with the method preparation Fe-based amorphous/kept most content of amorphous, Heat stability is good in nanocrystalline composite coating; The preparation technology of coating is simple and easy to do.
Description of drawings
Fig. 1 is the scanning electron microscope (SEM) photograph of Fe-based amorphous/nanocrystalline composite coating
Fig. 2 is the XRD figure of Fe-based amorphous/nanocrystalline composite coating
Fig. 3 is the DSC test curve of Fe-based amorphous/nanocrystalline composite coating
The specific embodiment
Embodiment 1
One, the preparation of the brilliant composite coating of Fe-based amorphous/sodium rice
Prepare Fe-based amorphous surfacing welding: with Fe-based amorphous alloy Fe
41Co
7Cr
15Mo
14C
15B
6Y
2(atomic percentage) as core wire, diameter is 2.0mm; Require coating of build-up welding bar to be carried out Composition Design, coating quality coefficient K according to coating performance
b=0.6, the component of coating (mass percent) is as follows: marble 45%, fluorite 26%, titanium dioxide 3%, soda ash 1.5%, mid-carbon fe-mn 3.5%, ferrotianium 12%, 45 ferrosilicon 2%, quartzy 7%.
Formulate rational bead-welding technology parameter, in the enterprising windrow weldering in Q235 steel surface, make the brilliant composite coating of Fe-based amorphous/sodium rice.The bead-welding technology parameter sees Table 1:
Table 1 is Fe-based amorphous/the bead-welding technology parameter of the brilliant composite coating of sodium rice
Two, the performance test of the brilliant composite coating of Fe-based amorphous/sodium rice
Analyze microstructure phase composition and the heat endurance of the brilliant composite coating of Fe-based amorphous/sodium rice.Fig. 1, Fig. 2 are tissue topography and the XRD analysis result of Fe-based amorphous/nanocrystalline composite coating, and its degree of crystallinity is 20.86%, and the content of amorphous phase is 79.14%, and nanocrystalline crystallite dimension is 40～60nm.Fig. 3 is the DSC test curve of Fe-based amorphous/nanocrystalline composite coating, records the crystallization temperature T of coating
xIt is 747.2 ℃.
1, the Micro-Structure Analysis of coating:
Utilize Quanta450 type environmental scanning electron microscope and X ' PertProX x ray diffractometer x to carry out contextual analysis of organization to overlay cladding and show, the overlay cladding moulding is good, pore-free, defects i.e.cracks; The X ray diffracting spectrum of overlay cladding is typical amorphous state diffuse scattering peak, and calculating respectively the overlay cladding content of amorphous with X-ray diffraction peak width method and Scherrer formula is 79.14%, the nanocrystalline 40～60nm that is of a size of.
2, the dsc analysis of coating:
Fe-based amorphous/nanocrystalline composite coating is cut into the thin slice of 5mm * 1mm * 1mm, adopt NetzschSTA409PC simultaneous thermal analysis instrument it to be carried out dsc analysis, heating rate 15K/min; Gained DSC curve as shown in Figure 3.As seen from Figure 3, obvious crystallization peak, initial crystallization temperature T have appearred in the DSC curve of overlay cladding
x=747.2 ℃, illustrate that overlay cladding has good heat endurance.
Embodiment 2
Adopt the Fe-based amorphous surfacing welding in embodiment 1, adjust the arc surfacing technological parameter, in the enterprising windrow weldering test of Q235 steel surface, the bead-welding technology parameter sees Table 2:
Table 2 is Fe-based amorphous/the bead-welding technology parameter of the brilliant composite coating of sodium rice
Obtain the good amorphous/nanocrystalline composite coating of moulding, its degree of crystallinity is 40.61%, and amorphous content is 59.39%, and nanocrystalline grain size is in the 80nm left and right.
Claims (2)
1. the preparation method of Fe-based amorphous/nanocrystalline composite coating, following steps successively:
1) prepare Fe-based amorphous surfacing welding: its core wire is the Fe of diameter 2～5mm
41Co
7Cr
15Mo
14C
15B
6Y
2(atomic percentage) Fe-based amorphous alloy, its coating adopts low hydorgew sodium type, coating quality coefficient K
b=0.6, described coating is made of in mass ratio following component: marble 40～48%, fluorite 20～30%, titanium dioxide 2～5%, soda ash 0～2%, mid-carbon fe-mn 3～8%, ferrotianium 8～15%, 45 ferrosilicon 2～5%, quartzy 3～10%;
2) adopt the manual electric arc pile up welding method to carry out built-up welding on Q235 steel surface, adopt following bead-welding technology parameter: dc reverse connection, weldingvoltage U=20～30V, welding current I=40～100A, speed of welding 5～12.0mm/s, argon flow amount 16～25L/min obtains Fe-based amorphous/nanocrystalline composite coating.
2. the preparation method of composite coating as claimed in claim 1, is characterized in that, the preparation process of described Fe-based amorphous surfacing welding is as follows: with Fe
41Co
7Cr
15Mo
14C
15B
6Y
2(atomic percentage) Fe-based amorphous alloy is as core wire, the polishing alignment; With each component powder of described coating sieve be dry mixed evenly after, add the binding agent of medicinal powder quality 16～20% to mix, the Baume degrees of described binding agent sodium silicate is 42.5, send in extrusion press coating is wrapped on core wire, then carry out 60～150 ℃ of low temperature dryings, 350～380 ℃ of hyperthermia dryings.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105220084A (en) * | 2015-11-10 | 2016-01-06 | 中国石油集团渤海钻探工程有限公司 | A kind of iron-based amorphous nanocrystalline composite coating and preparation method thereof |
| CN107009048A (en) * | 2017-04-24 | 2017-08-04 | 南昌航空大学 | A kind of Fe-based amorphous welding material of Twin wire arc built-up welding |
| CN109023356A (en) * | 2018-09-30 | 2018-12-18 | 山东大学 | The research of Q235 steel Argon arc cladding FeCoCrMoCBY alloy coat |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0513765B2 (en) * | 1985-07-22 | 1993-02-23 | Masahiko Suzuki | |
| CA2774546A1 (en) * | 2009-09-17 | 2011-03-24 | Scoperta, Inc. | Compositions and methods for determining alloys for thermal spray, weld overlay, thermal spray post processing applications, and castings |
| CN102275049A (en) * | 2011-08-01 | 2011-12-14 | 江西恒大高新技术股份有限公司 | Amorphously structured overlaying flux cored welding wire |
-
2013
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0513765B2 (en) * | 1985-07-22 | 1993-02-23 | Masahiko Suzuki | |
| CA2774546A1 (en) * | 2009-09-17 | 2011-03-24 | Scoperta, Inc. | Compositions and methods for determining alloys for thermal spray, weld overlay, thermal spray post processing applications, and castings |
| CN102275049A (en) * | 2011-08-01 | 2011-12-14 | 江西恒大高新技术股份有限公司 | Amorphously structured overlaying flux cored welding wire |
Non-Patent Citations (1)
| Title |
|---|
| BIN WANG1,ET AL.: ""Microstructure and Wearability of Surface Coating of Fe-based Amorphous Core Welding Rod"", 《ADVANCED MATERIALS RESEARCH》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105220084A (en) * | 2015-11-10 | 2016-01-06 | 中国石油集团渤海钻探工程有限公司 | A kind of iron-based amorphous nanocrystalline composite coating and preparation method thereof |
| CN105220084B (en) * | 2015-11-10 | 2017-05-10 | 中国石油集团渤海钻探工程有限公司 | Iron-based amorphous nanocrystalline composite coating and preparation method thereof |
| CN107009048A (en) * | 2017-04-24 | 2017-08-04 | 南昌航空大学 | A kind of Fe-based amorphous welding material of Twin wire arc built-up welding |
| CN107009048B (en) * | 2017-04-24 | 2019-01-25 | 南昌航空大学 | A kind of Fe-based amorphous welding material of Twin wire arc built-up welding |
| CN109023356A (en) * | 2018-09-30 | 2018-12-18 | 山东大学 | The research of Q235 steel Argon arc cladding FeCoCrMoCBY alloy coat |
| CN109023356B (en) * | 2018-09-30 | 2020-01-03 | 山东大学 | Research on Q235 steel argon arc cladding FeCoCrMoCBY alloy coating |
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| CN103128421B (en) | 2015-05-27 |
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