CN106180971B - Tungsten carbide Fe-based self-fluxing alloy resurfacing welding material and overlaying method - Google Patents
Tungsten carbide Fe-based self-fluxing alloy resurfacing welding material and overlaying method Download PDFInfo
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- CN106180971B CN106180971B CN201610716067.4A CN201610716067A CN106180971B CN 106180971 B CN106180971 B CN 106180971B CN 201610716067 A CN201610716067 A CN 201610716067A CN 106180971 B CN106180971 B CN 106180971B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/04—Welding for other purposes than joining, e.g. built-up welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/3601—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest with inorganic compounds as principal constituents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
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Abstract
The invention discloses a kind of tungsten carbide Fe-based self-fluxing alloy resurfacing welding material and overlaying method, the resurfacing welding material is the mixture of the tungsten carbide of Fe-based self-fluxing alloy and 20%-30% parts by weight, and overlay cladding microscopic structure is by polygonal tungsten carbide and eutectic composition.Overlaying method includes: to be uniformly mixed Fe-based self-fluxing alloy and tungsten-carbide powder in automatic mixing machine；Mixed-powder is mixed with waterglass, cold-press moulding obtains coating；Coating is coated in matrix surface, is put into baking oven drying, then natural cooling in air；Using carbon dioxide gas arc welding as heat source, the mixed-powder described in matrix surface built-up welding, overlay cladding microscopic structure is by polygonal tungsten carbide and a small amount of eutectic composition.The problem of the present invention overcomes existing resurfacing welding material surface hardness and wearing no resistance, obtains high surface hardness and wearability.
Description
Technical field
The invention belongs to alloy welding deposit field of material technology, specifically, being related to a kind of tungsten carbide Fe-based self-fluxing alloy heap
Wlding material and overlaying method.
Background technique
Numerous parts generating material surface during long-time service and military service is seriously worn and fails.Built-up welding is a kind of table
Face modification processing method refers to the alloy material with certain service performance by certain heat source means cladding in fertile material
Surface, to assign base material Special use performance or part made to restore the process of original geomery.It can be improved zero
Part service life makes common material surface obtain wear-resisting, corrosion-resistant, high rigidity overlay cladding.Resurfacing welding material has iron-based from fusion
Gold, nickel-based self-fluxing alloy, cobalt base self-fluxing alloy etc..However there is surface hardness and wear no resistance in existing resurfacing welding material.
Summary of the invention
In view of this, the present invention is directed to above-mentioned problem, provide a kind of tungsten carbide Fe-based self-fluxing alloy resurfacing welding material and
Overlaying method overcomes the problems, such as existing resurfacing welding material surface hardness and wears no resistance, obtains high surface hardness and wearability.
In order to solve the above-mentioned technical problem, described the invention discloses a kind of tungsten carbide Fe-based self-fluxing alloy resurfacing welding material
Resurfacing welding material is the mixture of the tungsten carbide of Fe-based self-fluxing alloy and 20%-30% parts by weight, and the granularity of tungsten carbide is 100-200
Mesh, overlay cladding microscopic structure is by polygonal tungsten carbide and eutectic composition.
Further, the resurfacing welding material is in matrix surface overlay cladding with a thickness of 2-3mm.
Further, described matrix is Q235 steel.
Further, the surfacing hardness value is 65.7HRC.
Further, the overlay cladding abrasion loss is 11.7mg.
Further, the Fe-based self-fluxing alloy is Fe314.
The invention also discloses a kind of overlaying methods of tungsten carbide Fe-based self-fluxing alloy resurfacing welding material, comprising:
Fe-based self-fluxing alloy and the tungsten-carbide powder of 20%-30% parts by weight are uniformly mixed in automatic mixing machine, obtained
Mixed-powder；
The mixed-powder is mixed with waterglass, cold-press moulding obtains the mixed powder with regular shape, uniform thickness
Last coating；
The coating is coated in matrix surface, is put into baking oven drying, then natural cooling in air；
Using carbon dioxide gas arc welding as heat source, the mixed powder coat described in matrix surface built-up welding, acquisition
Overlay cladding microscopic structure is by polygonal tungsten carbide and a small amount of eutectic composition.
Further, the coating is coated in matrix surface with a thickness of 2-3mm.
Further, the carbon dioxide gas flow control is 10L/min.
Further, the technological parameter of the built-up welding are as follows: wire feed rate 0.35m/min, welding current 180A, electric arc
Voltage is 25V, and electric power polarity is straight polarity direct current.
Compared with prior art, the present invention can be obtained including following technical effect:
(1) carbon with characteristics such as high rigidity, high-wearing feature, high-melting-points is added in the present invention in fe-based self-fluxing alloy powder
Change tungsten as resurfacing welding material, carries out built-up welding as heat source using carbon-dioxide arc welding, overcome existing resurfacing welding material surface hardness
The problem of with wearing no resistance, to obtain high surface hardness and wearability；Overlay cladding microscopic structure by polygonal tungsten carbide and
A small amount of eutectic composition, the organizational form can obtain high hardness and small abrasion loss.
(2) when coating layer thickness is 3mm, WC content reaches 30%, and overlay cladding microscopic structure is by (the carbonization of polygonal carbide
Tungsten) and a small amount of eutectic composition, hardness number reach up to 65.7HRC, the minimum 11.7mg of abrasion loss.
Certainly, it implements any of the products of the present invention it is not absolutely required to while reaching all the above technical effect.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes a part of the invention, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the overlay cladding metallographic structure of comparative example 1 of the present invention；
Fig. 2 is the overlay cladding metallographic structure of comparative example 2 of the present invention；
Fig. 3 is overlay cladding metallographic structure × 400 of the embodiment of the present invention 1；
Fig. 4 is overlay cladding metallographic structure × 400 of the embodiment of the present invention 2.
Specific embodiment
Carry out the embodiment that the present invention will be described in detail below in conjunction with embodiment, whereby to the present invention how application technology hand
Section solves technical problem and reaches the realization process of technical effect to fully understand and implement.
The present invention provides a kind of tungsten carbide Fe-based self-fluxing alloy resurfacing welding material, the resurfacing welding material be Fe-based self-fluxing alloy and
The granularity of the mixture of the tungsten carbide of 20%-30% parts by weight, tungsten carbide is 100-200 mesh, and overlay cladding microscopic structure is by polygonal
Shape tungsten carbide and a small amount of eutectic composition.
Wherein, the parts by weight of tungsten-carbide powder are the weight relative to Fe-based self-fluxing alloy, and WC, which is added, can make metal material
Expect that surface hardness, wearability improve, can be applicable to hardness and the demanding occasion of wearability, but the excessively high meeting of tungsten carbide content
Cause overlay cladding and the i.e. Fe314 metallurgical bonding of base material bad, therefore tungsten carbide dosage selects 20%-30%.The granularity of tungsten carbide
It need to select OK range, it is excessive or too small can reduce wearability, therefore the granularity selection 100-200 mesh of tungsten carbide.
Preferably, resurfacing welding material is in matrix surface overlay cladding with a thickness of 2-3mm.Wherein, thickness too it is small cause overlay cladding by
Base material dilution rate influences greatly, to reduce performance, and thickness causes greatly very much not weld penetration or overlay cladding and base material metallurgical bonding bad, because
This thickness selects 2-3mm.
Preferably, the surfacing hardness value is 65.7HRC.
Preferably, the overlay cladding abrasion loss is 11.7mg.
Basis material used in the present embodiment is Q235 steel, and specimen size is processed into 100mm × 40mm × 10mm, ingredient
Such as table 1.
Table 1Q235 composition of steel (mass fraction, %)
The Fe base self-fluxing alloy trade mark used in the present embodiment is Fe314 (ingredient is shown in Table 2), is the iron-based self-fluxing nature of high-chromium cast iron-type
Alloy powder belongs to Fe-Cr-B-Si system self-fluxing alloy, is to add B, Si, Ni on the basis of rich chromium cast iron antifriction alloy ingredient
What equal elements developed.
The self-fluxing alloy ingredient (mass fraction, %) of table 2Fe314
The present invention also provides a kind of overlaying methods of tungsten carbide Fe-based self-fluxing alloy resurfacing welding material, comprising the following steps:
Step 1: the tungsten-carbide powder (granularity is 100-200 mesh) of Fe-based self-fluxing alloy and 20%-30% parts by weight is existed
It is uniformly mixed in automatic mixing machine, obtains mixed-powder；Wherein the parts by weight of tungsten-carbide powder are relative to Fe-based self-fluxing alloy
Weight.
Step 2: the mixed-powder being mixed, cold-press moulding with a certain amount of waterglass, obtained with regular shape,
The mixed powder coat of even thickness；Wherein waterglass plays bonding, and dosage wants moderate, and waterglass dosage is with mixed-powder
Blocking it can be advisable.
Due to using CO 2 gas-shielded built-up welding, the alloy powder granularity on base material is deposited in front of striking compared with little Yi quilt
Air-flow dispels.After striking, carbon dioxide gas arc welding blow force of arc is larger, when welding torch is mobile, can will be coated on specimen surface
Powder push ahead, cause weld overlay alloy component distributing uneven, therefore mixed-powder and a certain amount of waterglass are mixed,
Cold-press moulding obtains the mixed powder coat with regular shape, uniform thickness.
Step 3: the coating being coated in matrix surface, is put into baking oven drying, then natural cooling in air；
Step 4: using carbon dioxide gas arc welding as heat source, the mixed powder coat described in matrix surface built-up welding,
The overlay cladding microscopic structure of acquisition is by polygonal tungsten carbide and a small amount of eutectic composition.Wherein polygonal tungsten carbide and a small amount of eutectic
Organizational form can obtain high hardness and small abrasion loss.
Further, the coating is coated in matrix surface with a thickness of 2-3mm.
Further, the carbon dioxide gas flow control is 10L/min.
Further, the hardness number of overlay cladding is up to 65.7HRC, the minimum 11.7mg of abrasion loss.
Further, the technological parameter of the built-up welding are as follows: welding wire is high manganese welding wire H08Mn2SiA, and gage of wire is
1.0mm, wire feed rate 0.35m/min, welding current 180A, arc voltage 25V, electric power polarity are straight polarity direct current.
Embodiment 1
Step 1: Fe-based self-fluxing alloy Fe314 and the tungsten-carbide powder of 20% parts by weight are mixed in automatic mixing machine
It is even, obtain mixed-powder；
Step 2: the mixed-powder being mixed, cold-press moulding with a certain amount of waterglass, obtained with regular shape,
The mixed powder coat of even thickness；
Step 3: the coating being coated in matrix Q235 steel surface, applied thickness 3mm is put into baking oven drying, then
Natural cooling in air；
Step 4: using carbon dioxide gas arc welding as heat source, control carbon dioxide gas flow is 10L/min,
Mixed powder coat described in matrix Q235 steel surface built-up welding, overlay cladding microscopic structure is by polygonal tungsten carbide and a small amount of eutectic group
At.The technological parameter of built-up welding are as follows: welding wire is high manganese welding wire H08Mn2SiA, gage of wire 1.0mm, wire feed rate 0.35m/
Min, welding current 180A, arc voltage 25V, electric power polarity are straight polarity direct current.
Embodiment 2
Step 1: Fe-based self-fluxing alloy Fe314 and the tungsten-carbide powder of 30% parts by weight are mixed in automatic mixing machine
It is even, obtain mixed-powder；
Step 2: the mixed-powder being mixed, cold-press moulding with a certain amount of waterglass, obtained with regular shape,
The mixed powder coat of even thickness；
Step 3: the coating being coated in matrix Q235 steel surface, applied thickness 3mm is put into baking oven drying, then
Natural cooling in air；
Step 4: using carbon dioxide gas arc welding as heat source, control carbon dioxide gas flow is 10L/min,
Mixed powder coat described in matrix Q235 steel surface built-up welding, overlay cladding microscopic structure is by polygonal tungsten carbide and a small amount of eutectic group
At.The technological parameter of built-up welding are as follows: welding wire is high manganese welding wire H08Mn2SiA, gage of wire 1.0mm, wire feed rate 0.35m/
Min, welding current 180A, arc voltage 25V, electric power polarity are straight polarity direct current.
Embodiment 3
Step 1: Fe-based self-fluxing alloy Fe314 and the tungsten-carbide powder of 20% parts by weight are mixed in automatic mixing machine
It is even, obtain mixed-powder；
Step 2: the mixed-powder being mixed, cold-press moulding with a certain amount of waterglass, obtained with regular shape,
The mixed powder coat of even thickness；
Step 3: the coating being coated in matrix Q235 steel surface, applied thickness 2mm is put into baking oven drying, then
Natural cooling in air；
Step 4: using carbon dioxide gas arc welding as heat source, control carbon dioxide gas flow is 10L/min,
Mixed powder coat described in matrix Q235 steel surface built-up welding, overlay cladding microscopic structure is by polygonal tungsten carbide and a small amount of eutectic group
At.The technological parameter of built-up welding are as follows: welding wire is high manganese welding wire H08Mn2SiA, gage of wire 1.0mm, wire feed rate 0.35m/
Min, welding current 180A, arc voltage 25V, electric power polarity are straight polarity direct current.
Embodiment 4
Step 1: Fe-based self-fluxing alloy Fe314 and the tungsten-carbide powder of 25% parts by weight are mixed in automatic mixing machine
It is even, obtain mixed-powder；
Step 2: the mixed-powder being mixed, cold-press moulding with a certain amount of waterglass, obtained with regular shape,
The mixed powder coat of even thickness；
Step 3: the coating being coated in matrix Q235 steel surface, applied thickness 3mm is put into baking oven drying, then
Natural cooling in air；
Step 4: using carbon dioxide gas arc welding as heat source, control carbon dioxide gas flow is 10L/min,
Mixed powder coat described in matrix Q235 steel surface built-up welding, overlay cladding microscopic structure is by polygonal tungsten carbide and a small amount of eutectic group
At.The technological parameter of built-up welding are as follows: welding wire is high manganese welding wire H08Mn2SiA, gage of wire 1.0mm, wire feed rate 0.35m/
Min, welding current 180A, arc voltage 25V, electric power polarity are straight polarity direct current.
Comparative example 1
By Fe-based self-fluxing alloy Fe314, tungsten carbide is not added, carries out built-up welding in matrix Q235 steel surface, coating layer thickness is
2mm, remaining condition are same as Example 1.
Comparative example 2
By Fe-based self-fluxing alloy Fe314, tungsten carbide is not added, carries out built-up welding in matrix Q235 steel surface, coating layer thickness is
3mm, remaining condition are same as Example 1.
The sample of heap postwelding is polished, is polished, then with 4% nital corrosion sample, it is vertical in XJL-024 type
Overlay cladding microscopic structure is observed on metallographic microscope.Using the Rockwell hardness of HR150-A type Rockwell hardness machine test overlay cladding, often
A sample surveys three numerical value, then calculates Rockwell hardness of the average value as the sample.Disc type abrasive test is sold in ML-100
Abrasive grain wear test is carried out on machine, and the sample of abrasion front and back is put and is weighed on an electronic balance, abrasion loss is calculated.
Test result:
(1) overlay cladding Metallographic Analysis
Fig. 1 is the Fe314 overlay cladding microscopic structure of 1 coating layer thickness 2mm of comparative example, and tissue is that primary austenite is added less
Eutectic is measured, is a kind of hypoeutectic structure；Fig. 2 is the Fe314 surfacing layer of 2 coating layer thickness 3mm of comparative example, it is typical mistake
Eutectic structure has a small amount of alloyed cementite (white strip phase) on a large amount of eutectic structure matrixes, and alloyed cementite is answered
For (Fe, Cr)3C, remaining tissue should be the eutectic of Various Complex compound, such as carbide and boride, compared to Figure 1 compared with,
Fig. 2 surfacing layer is similar with Fe314, is still high-chromium alloy cast-iron type, and this is mainly due to increase heap with coating layer thickness
The reason that layer tissue is reduced by base material diluting effect.Fig. 3 is 1 coating layer thickness 3mm of embodiment, the overlay cladding group containing 20%WC
Knit, there is nascent solid solution dendrite and a large amount of eutectic structures on a small quantity in tissue, this illustrates that dilution rate is smaller, built-up welding composition of layer close to
The primitive component of self-fluxing alloy, and since the not high WC of WC content may melt in weld deposit process；Fig. 4 is that embodiment 2 applies
Thickness degree 3mm, the surfacing layer containing 30%WC, the tissue is very typical, is by polygonal carbide (tungsten carbide) and a small amount of
Eutectic composition is analyzed according to relevant information, and polygonal is tungsten carbide, and strip is alloyed cementite, and these compounds
It is to be precipitated and grow up under solid phase.
(2) surfacing hardness is analyzed
Surfacing hardness value when table 3 is different coating thickness and different WC contents, from table 3 it is observed that working as alloyed powder
The hardness of overlay surface increases with the increase of coating layer thickness when being free of WC in end, from metallograph as can be seen that when applying
When layer is with a thickness of 3mm, surfacing layer is hypereutectic tissue, has (Fe, Cr) in tissue3C-type carbide and austenite and carbon boron
The eutectic structure of compound, therefore hardness is higher when coating layer thickness is 3mm；When coating layer thickness be 3mm it is constant, in Fe314 plus
When entering WC, the hardness of overlay surface increases with the increase of WC content, has part WC particle in built-up welding when WC content is less
Shi Fasheng melts, and has a large amount of eutectics in metallographic structure, therefore hardness number is also higher.When WC content reaches 30%, pass through gold
Phase constitution, which can see in tissue, a large amount of WC particles, and the dispersion-strengthened action of these hard particles has alloy welding deposit layer
Higher wearability, red hardness and inoxidizability, therefore when WC content is 30%, surfacing hardness value is up to 65.7HRC.
3 surfacing hardness of table
(3) overlay cladding Analysis on Wear
The abrasion magnitude of overlay cladding when table 4 is different coating thickness and different WC contents, under normal circumstances, material is harder,
Wearability is better, from table it can also be seen that, when being free of WC in alloy powder, when coating layer thickness 3mm, hardness number highest, abrasion loss
Minimum, when coating layer thickness 3mm is constant, when WC content reaches 30%, hardness number highest, abrasion loss minimum.WC is superhard hard
Matter phase, the hard phase WC in overlay cladding can be such that the hardness of sample overlay surface increases substantially, and abrasion loss sharply declines.
4 overlay cladding abrasion loss of table
In conclusion WC content reaches 30%, and overlay cladding microscopic structure is by polygonal carbide when coating layer thickness is 3mm
(tungsten carbide) and a small amount of eutectic composition, hardness number reach up to 65.7HRC, the minimum 11.7mg of abrasion loss.
The carbonization with characteristics such as high rigidity, high-wearing feature, high-melting-points is added in the present invention in fe-based self-fluxing alloy powder
Tungsten carries out built-up welding as heat source as resurfacing welding material, using carbon-dioxide arc welding, overcomes existing resurfacing welding material surface hardness
The problem of with wearing no resistance, obtains high surface hardness and wearability.
Above description has shown and described several preferred embodiments of invention, but as previously described, it should be understood that invention is not
It is confined to form disclosed herein, should not be regarded as an exclusion of other examples, and can be used for various other combinations, modification
And environment, and can be carried out within that scope of the inventive concept describe herein by the above teachings or related fields of technology or knowledge
Change.And changes and modifications made by those skilled in the art do not depart from the spirit and scope of invention, then it all should be in the appended power of invention
In the protection scope that benefit requires.
Claims (7)
1. tungsten carbide Fe-based self-fluxing alloy resurfacing welding material, which is characterized in that the resurfacing welding material is Fe-based self-fluxing alloy and 30%
The mixture of the tungsten carbide of parts by weight, the parts by weight of tungsten-carbide powder are the weight relative to Fe-based self-fluxing alloy, tungsten carbide
Granularity is 100-200 mesh, and overlay cladding microscopic structure is by polygonal tungsten carbide and eutectic composition；
The resurfacing welding material is in matrix surface overlay cladding with a thickness of 3mm；
Described matrix is Q235 steel.
2. tungsten carbide Fe-based self-fluxing alloy resurfacing welding material as described in claim 1, which is characterized in that the surfacing hardness value
For 65.7HRC.
3. tungsten carbide Fe-based self-fluxing alloy resurfacing welding material as claimed in claim 1 or 2, which is characterized in that the overlay cladding mill
Damage amount is 11.7mg.
4. tungsten carbide Fe-based self-fluxing alloy resurfacing welding material as described in claim 1, which is characterized in that the Fe-based self-fluxing alloy
For Fe314.
5. the overlaying method of tungsten carbide Fe-based self-fluxing alloy resurfacing welding material characterized by comprising
Fe-based self-fluxing alloy and the tungsten-carbide powder of 30% parts by weight are uniformly mixed in automatic mixing machine, obtain mixed-powder；
Wherein, the parts by weight of tungsten-carbide powder are the weight relative to Fe-based self-fluxing alloy；
The mixed-powder is mixed, cold-press moulding with waterglass, obtains that there is the mixed-powder of regular shape, uniform thickness to apply
Layer；
The coating is coated in matrix surface, is put into baking oven drying, then natural cooling in air；
Using carbon dioxide gas arc welding as heat source, the mixed powder coat described in matrix surface built-up welding, the built-up welding of acquisition
Layer microscopic structure is by polygonal tungsten carbide and a small amount of eutectic composition；
The coating is coated in matrix surface with a thickness of 3mm.
6. the overlaying method of tungsten carbide Fe-based self-fluxing alloy resurfacing welding material as claimed in claim 5, which is characterized in that described two
Carbon oxide gas flow control is 10L/min.
7. the overlaying method of tungsten carbide Fe-based self-fluxing alloy resurfacing welding material as claimed in claim 5, which is characterized in that the heap
The technological parameter of weldering are as follows: wire feed rate 0.35m/min, welding current 180A, arc voltage 25V, electric power polarity are straight
Stream just connects.
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| CN111843106A (en) * | 2020-06-23 | 2020-10-30 | 苏州优霹耐磨复合材料有限公司 | Overlaying welding dilution compensation process |
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