CN109226942A - A kind of method of two-layer compound powder and submerged arc overlay welding high-chromium alloy - Google Patents
A kind of method of two-layer compound powder and submerged arc overlay welding high-chromium alloy Download PDFInfo
- Publication number
- CN109226942A CN109226942A CN201811380838.2A CN201811380838A CN109226942A CN 109226942 A CN109226942 A CN 109226942A CN 201811380838 A CN201811380838 A CN 201811380838A CN 109226942 A CN109226942 A CN 109226942A
- Authority
- CN
- China
- Prior art keywords
- powder
- welding
- layer compound
- chromium alloy
- compound powder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- B23K9/18—Submerged-arc welding
-
- 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
- B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
- B23K35/0222—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in soldering, brazing
- B23K35/0244—Powders, particles or spheres; Preforms made therefrom
-
- 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
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3053—Fe as the principal constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
- C22C27/06—Alloys based on chromium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Nonmetallic Welding Materials (AREA)
- Arc Welding In General (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention discloses a kind of methods of two-layer compound powder and submerged arc overlay welding high-chromium alloy.The method of the present invention is mainly, it includes that the mixed-powder being made of various powdery components forms the Composite particle of specified particle size through bonded pelleting, adhesive surface activating agent, sintering and sifting step and serves as the H08A solid welding wire of arc vector as resurfacing welding material that it, which is used, carry out submerged-arc welding, utilize the easy launching electronics of the Composite particle with surfactant, induce electric arc optimization fusing Composite particle, and fusing Composite particle melt and molten drop is integrated molten bath, which forms through cooled and solidified with the M that comes into being7C3For the high-chromium alloy of the institutional framework of main wear phase.Not only preparation process is simple and deposition efficiency is high for the method for the present invention, but also prepared high-chromium alloy has good wearability, fully meets real requirement, can be used for components submerged arc overlay welding wearing layer under abrasive wear operating condition.
Description
Technical field
The invention belongs to hardfacing technical fields, and in particular to a kind of two-layer compound powder with surfactant and
The method of its submerged arc high-chromium alloy.
Background technique
High-chromium alloy is because to contain microhardness higher (Fe, Cr) for it7C3(1300~1800HV) and (Fe, Cr)23C6
Carbide such as (1140HV) and better Abrasive Resistance of Stubble-cleaning is presented, have both corrosion resistance, be widely used as part the most
Wear-resistant material, such as cement grinding roller, liner plate and concrete delivery pipe.
The preparation method of high-chromium alloy mainly casting and built-up welding etc..Casting uses the raw materials such as electro-smelting high carbon ferro-chrome,
Then molten iron is injected into sand mold and prepares high chromium part, but moulding process requires height, raw material and energy consumption are big.Built-up welding is low
Carbon or low alloy steel substrate deposition high-chromium alloy, as flux-cored wire submerged-arc welding or self-shield open arc welding, covered-electrode welding,
The weldering of silk material oxy-acetylene flame, powder laser deposition, powder plasma arc deposition, powder spray welding and strip electrode electroslag surfacing etc.；Wherein,
It is the most typical with flux-cored wire submerged-arc welding or self-shield open arc welding, it is currently the mainstream manufacturing method of high-chromium alloy, its advantage is that
The raw materials such as high carbon ferro-chrome and energy consumption are less, even if can still repair use after the abrasion of high-chromium alloy layer.
The resurfacing welding material of high-chromium alloy is based on flux-cored wire, high chromium solid welding wire or powder.Covered electrode is molten because of it
It is relatively low to apply efficiency, and labor intensive is excessive, use ratio declines year by year.Flux-cored wire advantage is that built-up welding continuous production is good,
Deposition efficiency is higher；But the disadvantage is that the development & production period is long, single welding wire applicable surface is narrow and price is more expensive.Laser, plasma
With alloy powder used in the methods of surfacing, air-flow powder feeding is mostly used, high, used powder price is required to the sphericity of powder
Expensive and kind is few.Moreover, laser, plasma arc equipment investment are high, and maintenance is complicated, and medium-sized and small enterprises are difficult to bear
Its excessively high use cost；And laser and plasma cladding because its heat input it is big, powder deposition alloy easily cracks.In addition,
Individual enterprises use powder block surfacing high-chromium alloy, although supply of material form is simple, because powder agglomates arcing is poor, cause its component non-
Chang Teshu, and overlay-operation requires height, therefore apply few.
In addition, built-up welding high-chromium alloy is prominent because being influenced by mild steel or low alloy steel substrate component diluent, with base
The tissue of hypoeutectic structure, high-chromium alloy composition of layer and tissue odds' weighing apparatus are formd at body interface.After the abrasion of its surface layer hard formation, after
Subsequent layers are severely impacted because of rapid wear, part service life.
Summary of the invention
It is an object of the invention to for drawbacks described above existing for existing high-chromium alloy overlaying method, provide a kind of both easily to draw
Arc and deposition efficiency height, and make prepared high-chromium alloy that there is the two-layer compound powder of excellent abrasive resistance and the high chromium of submerged arc overlay welding to close
The method of gold.
Above-mentioned purpose of the invention is realized by the following technical solutions:
The method of the two-layer compound powder and submerged arc overlay welding high-chromium alloy, including following steps in sequence:
(1) alloy compositions powder mixes: each alloy compositions powder being sieved respectively, is matched according to each alloy compositions powder constituent
Than weighing, it is put into same container, is sufficiently stirred and is allowed to uniformly mixed, form mixed-powder；
Each alloy compositions powder constituent proportion are as follows: the chrome content that weight percentage is 75~80% is 68~
72%, the high carbon ferro-chrome (FeCr70C8.0) that phosphorus content is 8%；The vanadium content that weight percentage is 9~12% is 50%
Vanadium iron (FeV50-A)；The ferrotianium (FeTi30A) that the titaniferous amount that weight percentage is 2~4% is 25~35%；Weight percent
The phosphorus content that content is 6~8% is not less than 98% crystalline flake graphite (C)；Surplus is the reduced iron powder that iron-content is not less than 98%
(Fe)；
(2) mixed-powder bonded pelleting: the annex solution class binder into mixed-powder obtained by step (1), during addition not
Disconnected stirring, and make rotary powder, 1~2 hour is stood with sizing, obtains the wet Composite particle of almost spherical；
(3) wet Composite particle surface adhesion activating agent: the wet Composite particle after step (2) sizing is spread out, and makes its heap
Product height is less than 10mm, sprays fine activating agent to Composite particle surface, during spraying, stirs powder slightly to be allowed to surface
One layer of activating agent on uniform adhesion forms two-layer compound powder；
(4) two-layer compound powder is sintered: the container for filling two-layer compound powder obtained by step (3) is put into sintering furnace,
It is warming up to sintering temperature, 2~4 hours is kept the temperature, comes out of the stove after cooling to room temperature with the furnace；
(5) two-layer compound powder is sieved: the two-layer compound powder after step (4) is come out of the stove first crosses 10 meshes, and removal is greater than
The powder of 10 mesh, then it is crossed into 30 meshes, the powder less than 30 mesh is removed, acquisition granularity is 10 mesh~30 mesh two-layer compound powder
Grain；
(6) submerged arc overlay welding high-chromium alloy: setting automatic welder bead-welding technology parameter, and make each built-up welding parameter constant；?
On welding bead, two-layer compound powder made from initialization step (5) adjusts preset powder layer height and width, makes unit length welding bead
The ratio of the upper preset weight of two-layer compound powder and solid welding wire fusing weight on this section of welding bead meets sets requirement, then at this
Preset two-layer compound powder particle surface covers the granular fysed flux that upper a layer thickness is not less than 10mm；
Submerged-arc welding is carried out using the two-layer compound powder and solid welding wire as resurfacing welding material, make two-layer compound powder melt and
The fusion of solid welding wire molten drop is integrated molten bath；The molten bath cooled and solidified forms first layer weld seam, is air-cooled to the tilting of weld seam slag
It falls off；Then the built-up welding second layer and third layer are distinguished in the same way, obtain high-chromium alloy.
Specifically, each alloy compositions powder is crossed 60 meshes respectively in step (1).
Specifically, the liquid class binder is the silicic acid that Baume degrees is 20~40, modulus is 3.0~3.3 in step (2)
Sodium form waterglass；Liquid class binder add cubical content and mixed-powder weight ratio be 15~25ml silicic acid sodium form waterglass/
100g mixed-powder.
Specifically, the fine activating agent is the fluorination sodium powder (NaF) of 300 mesh of granularity in step (3)；Activating agent adds
The ratio of mixed-powder weight contained by add weight and Composite particle is that 0.5~1.5g is fluorinated sodium powder/100g mixed-powder.
Specifically, the sintering temperature is 300~400 DEG C in step (4).
Specifically, in step (6), the preset weight of two-layer compound powder and reality on this section of welding bead on the unit length welding bead
The ratio that cored welding wire melts weight is 0.70~1.00.
Specifically, the automatic welder bead-welding technology parameter is that current control value is 480~520A, small in step (6)
Vehicle 15~17m/h of the speed of travel, polarity are DC reverse connection.
Specifically, the solid welding wire is the H08A solid welding wire of diameter of phi 2.5mm~Φ 3.0mm in step (6).
Specifically, the granular fysed flux is HJ260 in step (6).
The main wear phase of the high-chromium alloy of the method for the present invention preparation is seven metallic element phase (M of nascent three carbonization7C3), M includes
The alloy elements such as Fe, Cr, V.The high-chromium alloy is typical hypereutectic structure organization, can be applied to the zero of abrasive wear operating condition
Component build-up wear-resistant layer, such as liner plate.
Compared with prior art, the present invention have following innovative point and the utility model has the advantages that
(1) matrix composition diluting effect is small: due to using the two-layer compound powder with surfactant as heap wlding
The characteristics of material, launching electronics easy using superficial layer activating agent, induction arcing are allowed to preferentially melt, reduce in Composite particle
Degree of heat of the electric arc to matrix, this makes the component diluent of base material act on the high chromium for reducing and obtaining ingredient and Tissue Equalization Techniques to close
Layer gold.
(2) alloy compositions quantity is few: Composite particle component of the invention also only has 7 kinds plus surfactant and waterglass
Component, is usual ingredients, and alloying component is easy to adjust.10 kinds or more alloy groups are usually required with flux-cored wire and covered electrode
Split-phase ratio, purchasing of raw materials quantity are greatly reduced, easily controllable hardfacing alloy ingredient and ensure quality stablize, built-up welding organization of production
It is easy.
(3) alloy compositions utilization efficiency is high: since high carbon ferro-chrome, vanadium iron, ferrotianium and graphite are focused on Composite particle, in
The components such as high carbide former such as Cr, V, Ti and carbon component are in coherent condition, this not only contributes to the M that comes into being in alloy7C3
The formation of phase, and realize the intensive use of alloy element；In addition, 10~30 mesh two-layer compound powders, than tradition 60~
The surface area of 80 mesh powder is greatly lowered, and is allowed to reduce with the haptoreaction area of oxygen atom；The above improves conjunction
Golden component utilization rate.
(4) high-chromium alloy preparation cost significantly reduces: compared with flux-cored wire and covered electrode, the system of two-layer compound powder
Standby simple process, built-up welding producer can self-organization production, be not necessarily to outsourcing, this makes manually to reduce needed for wlding transit link；Meanwhile
Powder production equipment is simple, is also remarkably decreased the fixed equipment cost for preparing high-chromium alloy；In addition, the high-chromium alloy production cycle
It is significant to shorten, improve the rate of capital turnover；The above significantly reduces the preparation cost of high-chromium alloy totally.
(5) high-chromium alloy layer tissue and ingredient prepared by are more balanced: due to the diluted reduction of base material and having surface
The use of activating agent Composite particle, each powder heating degree is more balanced, and the ingredient and tissue of melt local microcell are more equal
Weighing apparatus is formd with the nascent M of bulk7C3Phase and the secondary M of particle7C3The high-chromium alloy of the institutional framework of phase reasonable layout, this is allowed to have
There is higher toughness, three layers of submerged arc overlay welding do not crack.
Detailed description of the invention
Fig. 1 is the tissue morphology figure on the high-chromium alloy surface layer of the method for the present invention preparation.
Fig. 2 is the phase composition figure of high-chromium alloy shown in Fig. 1.
The high-chromium alloy and the tissue morphology figure at Q235A basal body interface that Fig. 3 is the method for the present invention preparation.
Fig. 4 is the tissue morphology figure on powder submerged arc overlay welding high-chromium alloy surface layer in comparative example 1.
Fig. 5 is the phase composition figure of powder submerged arc overlay welding high-chromium alloy in comparative example 1 shown in Fig. 3.
Fig. 6 is powder submerged arc overlay welding high-chromium alloy and the tissue morphology figure at Q235A basal body interface in comparative example 1.
Fig. 7 is the wear morphology figure of the high-chromium alloy of the preparation of the method for the present invention shown in Fig. 1.
Fig. 8 is the wear morphology figure of powder submerged arc overlay welding high-chromium alloy in comparative example 1 shown in Fig. 4.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.
The present invention using include the mixed-powder that is made of various powdery components through bonded pelleting, surface adhesion activating agent,
Sintering and sieving and etc. and formed the two-layer compound powder of specified particle size and serve as arc vector H08A solid welding wire make
For resurfacing welding material, carries out submerged-arc welding and prepare high-chromium alloy.
The weight percentage that the mixed-powder respectively forms powdery components be respectively as follows: 75~80% chrome content be 68~
72%, the high carbon ferro-chrome (FeCr70C8.0) that phosphorus content is 8%；The vanadium iron (FeV50-A) that 9~12% vanadium content is 50%；2
The ferrotianium (FeTi30A) that~4% titaniferous amount is 25~35%；6~8% phosphorus content is not less than 98% crystalline flake graphite (C)；
Surplus is the reduced iron powder (Fe) that iron-content is not less than 98%.
When submerged arc overlay welding, keep the preset weight of two-layer compound powder and solid welding wire on this section of welding bead on unit length welding bead molten
Change the Ratio control of weight 0.70~1.00, to obtain the good high-chromium alloy of wearability.
Before weighing mixed-powder component, first by powder such as high carbon ferro-chrome, vanadium iron, ferrotianium, crystalline flake graphite, reduced iron powders
Component crosses 60 meshes, is then weighed according to composition and ratio, and all powder component is put into same container, is sufficiently stirred
To be allowed to uniformly mixed, mixed-powder is formed.
Then, be 20~40 with the Baume degrees for pouring into 5ml every time to the mixed-powder, modulus is 3.0~3.3 silicic acid sodium form
Waterglass, until waterglass finally adds the silicic acid sodium form waterglass of 15~25ml cubical content in every 100g mixed-powder；Addition
Period keeps stirring, and makes mixed powder rotation to be granulated, and is then allowed to stand 1~2 hour with sizing, final acquisition forms close
Spheroidal wet Composite particle.
Continue, which is spread out, forms height and be lower than 10mm powder particle layer below；It is again that 300 purposes are ultra-fine
Change fluorination sodium powder (NaF) uniformly to spray in powder particle surface, sprays fluorination sodium powder weight and mixed with contained in the wet Composite particle
The ratio of powder weight is 0.5~1.5g sodium fluoride/100g mixed-powder, and is slightly stirred to be allowed to one on the uniform adhesion of surface
Layer surface activating agent forms two-layer compound powder；
Then, which is put into sintering furnace and is warming up to 300~400 DEG C, keep the temperature 2~4 hours, it is cold with furnace
But to coming out of the stove after room temperature.Finally, sintered Composite particle is first crossed 10 meshes, removal is greater than the bulky grain of 10 mesh；Again by it
30 meshes are crossed, the little particle less than 30 mesh, the final two-layer compound powder for obtaining 10~30 mesh of granularity are removed.
On length 160mm × width 75mm × thickness 16mm Q235A steel plate, the preset two-layer compound powder, adjustment
Preset powder layer height and width, make on unit length welding bead the preset weight of two-layer compound powder and Φ 2.5 on this section of welding bead~
The ratio of the H08A solid welding wire fusing weight of Φ 3.0mm is 0.70~1.00, to control the ingredient of built-up welding high-chromium alloy.
Before built-up welding, the polarity of automatic welder ZD5-1000E is selected as DC reverse connection, current setting value is 480~
520A, 28~40V of arc voltage, 28~40mm of dry extension of electrode, 15~17m/h of carriage walking speed, solder flux used are melting
Solder flux HJ260, and make each every layer heap Welding parameter constant.
Submerged-arc welding is carried out using above-mentioned two-layer compound powder and H08A solid welding wire as resurfacing welding material, keeps two-layer compound powder molten
Body and the fusion of H08A solid welding wire molten drop are integrated molten bath, form first layer weld seam after the cooled and solidified of molten bath, are air-cooled to weldering
Road slag Automatic-falling；Then the built-up welding second layer and third layer are distinguished in the same way, are air-cooled to slag Automatic-falling.
Based on this, the present invention has the two-layer compound powder of surfactant and its setting for submerged arc overlay welding high-chromium alloy method
Meter principle can be summarized as: first prefabricated 10~30 purpose has the two-layer compound powder of surfactant, then with the two-layer compound
Powder and solid welding wire cooperate fysed flux HJ260 as resurfacing welding material, and it is pre- to control two-layer compound powder on unit length welding bead
The ratio for setting weight with solid welding wire fusing weight on this section of welding bead, easily emits electricity using the Composite particle with surfactant
The Composite particle is melted in the advantage of son, induction electric arc optimization, fuses its melt and solid welding wire molten drop for integrated molten bath；It should
Molten bath is formed through cooled and solidified with seven metallic element (M of nascent three carbonization7C3) be main wear phase institutional framework high-chromium alloy.
Embodiment 1:
Before weighing, all powder component is first crossed into 60 meshes.High-carbon is weighed by the composition and ratio requirement of mixed-powder
The powdery components such as ferrochrome, vanadium iron, ferrotianium, crystalline flake graphite and reduced iron powder.The mixed-powder forms (weight percent) are as follows: high-carbon
Ferrochrome (FeCr70C8.0) 80%, vanadium iron (FeV50-A) 10%, ferrotianium (FeTi30A) 2%, crystalline flake graphite (C) 7%, reduced iron
Powder (Fe) 1%.Each powder after weighing is put into same container, is sufficiently stirred and is allowed to uniformly mix, forms mixed-powder.
Then, into above-mentioned mixed-powder, with the additive amount of each 5ml, it is doped into the silicic acid of Baume degrees 35, modulus 3.0
Sodium form waterglass, until every 100g mixed-powder waterglass finally adds the silicic acid sodium form waterglass of 20ml cubical content.Herein
Period keeps stirring, and makes mixed powder rotation to be granulated, and stands 1 hour with sizing, obtains the wet composite powder of almost spherical
Grain.
Continue, which is spread out, its piling height is made to be less than 10mm；Again by the fine sodium fluoride of 300 mesh/
NaF powder is uniformly sprayed in powder particle surface, sprays contained mixed-powder weight in fluorination sodium powder weight and the wet Composite particle
Ratio is 1.0g sodium fluoride/100g mixed-powder, and is slightly stirred to be allowed to layer of surface activating agent, shape on the uniform adhesion of surface
At the double-deck Composite particle；
Continue, which is put into sintering furnace and is warming up to 350 DEG C, keeps the temperature 2.5 hours, cool to room with the furnace
Temperature is come out of the stove.Then, which first crosses 10 meshes, and removal is greater than the bulky grain of 10 mesh；After 30 meshes,
Remove the little particle less than 30 mesh, the final two-layer compound powder for obtaining 10~30 mesh of granularity.
Finally, on length 160mm × width 75mm × thickness 16mm Q235A steel plate, the preset Composite particle, adjustment
Preset powder layer height and width are allowed to the preset weight of two-layer compound powder and diameter on this section of welding bead on unit length welding bead
The ratio of the H08A solid welding wire fusing weight of Φ 2.5 is 0.80~0.85.
Before built-up welding, DC reverse connection, bead-welding technology parameter such as 1 institute of table are set by the polarity of automatic welder ZD5-1000E
Show, solder flux used is fysed flux HJ260.
Two-layer compound powder and H08A solid welding wire to be sintered after being sieved carry out submerged-arc welding, make double as resurfacing welding material
Layer Composite particle melt and the fusion of solid welding wire molten drop are integrated molten bath.Molten bath cooled and solidified forms first layer weld seam, air-cooled
To face of weld slag Automatic-falling.Then, the built-up welding second layer and third layer respectively in the same way.Postwelding, weld seam is without splitting
The defects of line and stomata.
1 Composite particle of table and solid welding wire submerged arc overlay welding technological parameter
The processing of bead weld specimen wire cutting method is prepared as 57mm × 25.5mm × 6mm wearability sample, and uses HR-
150 Rockwell apparatuses test its surface macrohardness.
Abrasion test uses the wheeled abrasion tester of MLS-225B type damp sand rubber, and experimental condition is as follows: rubber wheel is straight
Diameter 176mm, hardness are 60 Shao Er, and added counterweight weighs 2.5 kilograms, and 240 revs/min of rubber wheel speed, mortar ratio is 40~60
1500 grams of quartz sands of mesh match 1000 grams of tap water.1000 turns of sample elder generation pre-grinding, is rinsed well, and drying claims initial weight M0, then formally
Drying is cleaned after 1000 turns of test, weigh M1, the absolute weight loss Δ M=M of sample abrasion0-M1。
Below in face of 1# bead weld specimen described in ratio 1 as standard sample, relative wear coefficient ε=standard sample is absolute
The absolute weight loss of weight loss/sample, test result are shown in Table 2.
The tissue morphology on the high-chromium alloy surface layer of the present embodiment 1, phase composition and its with the tissue of the interface Q235 respectively such as
Shown in Fig. 1, Fig. 2 and Fig. 3, the wear morphology of the high-chromium alloy is as shown in Figure 7.
Embodiment 2:
Before weighing, all powder component is first crossed into 60 meshes.High-carbon is weighed by the composition and ratio requirement of mixed-powder
The powdery components such as ferrochrome, vanadium iron, ferrotianium, crystalline flake graphite and reduced iron powder.The mixed-powder forms (weight percent) are as follows: high-carbon
Ferrochrome (FeCr70C8.0) 75%, vanadium iron (FeV50-A) 12%, ferrotianium (FeTi30A) 4%, crystalline flake graphite (C) 8%, reduced iron
Powder (Fe) 1%.Each powder after weighing is put into same container, is sufficiently stirred and is allowed to uniformly mix, forms mixed-powder.
Then, into above-mentioned mixed-powder, with the additive amount of each 5ml, it is doped into the silicic acid of Baume degrees 40, modulus 3.3
Sodium form waterglass, until every 100g mixed-powder waterglass finally adds the silicic acid sodium form waterglass of 15ml cubical content.Herein
Period keeps stirring, and makes mixed powder rotation to be granulated, and stands 1.5 hours with sizing, obtains the wet compound of almost spherical
Powder.
Continue, which is spread out, its piling height is made to be less than 10mm；Again by the fine sodium fluoride of 300 mesh
Powder (NaF) is uniformly sprayed in powder particle surface, and makes to be fluorinated contained mixed-powder weight in sodium powder weight and the wet Composite particle
Ratio be 0.8g sodium fluoride/100g mixed-powder, and slightly stir to be allowed to layer of surface activating agent on the uniform adhesion of surface,
Form two-layer compound powder；
Continue, which is put into sintering furnace and is warming up to 320 DEG C, keeps the temperature 3 hours, cool to room temperature with the furnace
It comes out of the stove.Then, which first crosses 10 meshes, and removal is greater than the bulky grain of 10 mesh；After 30 meshes, go
It is final to obtain the two-layer compound powder that granularity is 10~30 mesh except the little particle less than 30 mesh.
Finally, on length 160mm × width 75mm × thickness 16mm Q235A steel plate, the preset Composite particle, adjustment
Preset powder layer height and width are allowed to the preset weight of two-layer compound powder and diameter on this section of welding bead on unit length welding bead
The ratio of the H08A solid welding wire fusing weight of Φ 3.0 is 0.82~0.87.
Remaining step and abrasion test content are same as Example 1.
Embodiment 3:
Before weighing, all powder component is first crossed into 60 meshes.It is weighed by the composition and ratio requirement of above-mentioned mixed-powder
The powdery components such as high carbon ferro-chrome, vanadium iron, ferrotianium, crystalline flake graphite and reduced iron powder.The mixed-powder forms (weight percent) are as follows:
High carbon ferro-chrome 78% (FeCr70C8.0), ferrotianium (FeTi30A) 4%, crystalline flake graphite (C) 7%, is gone back vanadium iron (FeV50-A) 9%
Former iron powder (Fe) 2%.Each powder after weighing is put into same container, is sufficiently stirred and is allowed to uniformly mix, forms mixed powder
End.
Then, into above-mentioned mixed-powder, with the additive amount of each 5ml, it is doped into the silicic acid of Baume degrees 30, modulus 3.2
Sodium form waterglass, until every 100g mixed-powder waterglass finally adds the silicic acid sodium form waterglass of 25ml cubical content.Herein
Period keeps stirring, and makes mixed powder rotation to be granulated, and stands 1.2 hours with sizing, obtains the wet compound of almost spherical
Powder.
Continue, which is spread out, its piling height is made to be less than 10mm；Again by the fine sodium fluoride of 300 mesh
Powder (NaF) is uniformly sprayed in powder particle surface, and makes to be fluorinated mixed-powder weight contained by sodium powder weight and the wet Composite particle
Ratio is 1.5g sodium fluoride/100g mixed-powder, and is slightly stirred to be allowed to layer of surface activating agent, shape on the uniform adhesion of surface
At the double-deck Composite particle；
Continue, which is put into sintering furnace and is warming up to 380 DEG C, keeps the temperature 4 hours, cool to room temperature with the furnace
It comes out of the stove.Then, which first crosses 10 meshes, and removal is greater than the bulky grain of 10 mesh；After 30 meshes, go
It is final to obtain the two-layer compound powder that granularity is 10~30 mesh except the little particle less than 30 mesh.
Finally, on length 160mm × width 75mm × thickness 16mm Q235A steel plate, the preset Composite particle, adjustment
Preset powder layer height and width are allowed to the preset weight of two-layer compound powder and diameter on this section of welding bead on unit length welding bead
The ratio of the H08A solid welding wire fusing weight of Φ 2.5 is 0.85~0.90.
Remaining step and abrasion test content are same as Example 1.
Comparative example 1:
(weight percent) is formed according to the mixed-powder of embodiment 1 are as follows: high carbon ferro-chrome (FeCr70C8.0) 80%, vanadium iron
(FeV50-A) 10%, ferrotianium (FeTi30A) 2%, crystalline flake graphite (C) 7%, reduced iron powder 1 (Fe) %, weigh above-mentioned powder group
Point, then above-mentioned all powder component is put into same container, is sufficiently stirred and is allowed to uniformly mix.Then, it is preset in welding bead
On, mixed-powder height and width are adjusted, the mixed-powder weight and diameter of phi on this section of welding bead in unit length are allowed to
The ratio that 2.5mmH08A solid welding wire melts weight is 0.80~0.85, and is held essentially constant each bead-welding technology parameter.
Bead-welding technology parameter, polarity setting and the weld deposit process of automatic welder ZD5-1000E used in comparative example 1 is the same as implementation
Example 1.Abrasion test content is the same as embodiment 1.
The tissue morphology of submerged arc overlay welding high-chromium alloy, phase composition shown in comparative example 1 and the high-chromium alloy and Q235 matrix circle
Tissue morphology at face distinguishes as shown in Figure 4, Figure 5 and Figure 6, the wear morphology of high-chromium alloy prepared by comparative example 1 such as Fig. 8 institute
Show, using high-chromium alloy prepared by comparative example 1 as 1# control sample.
From table 2 it can be seen that the relative wear coefficient ε of high-chromium alloy prepared by the method for the present invention is preset identical mixed powder
1.48~1.63 times of high-chromium alloy prepared by end, and significantly lower than commercially available rich chromium cast iron flux-cored wire in same wear test item
Average 0.05~0.06g wear weight loss under part, this illustrates that high-chromium alloy prepared by the method for the present invention has good wearability,
Fully meet real requirement.
The Abrasive Resistance of Stubble-cleaning of high-chromium alloy prepared by 2 comparative example of table and embodiment
By Fig. 1 and Fig. 2 it is found that the present invention is using two-layer compound powder and H08A solid welding wire as wlding submerged arc overlay welding
High-chromium alloy tissue by come into being M7C3Phase, α-Fe (ferrite), (Fe, Cr)3C, minute quantity (Ti, V)2C and austenite group
At wherein M includes Fe, the metallic elements such as Cr, V.
In addition, from the figure 3, it may be seen that high-chromium alloy prepared by the method for the present invention and the tissue of the interface Q235A include a large amount of
Nascent (Fe, Cr)7C3Phase, this is with flux-cored wire or covered electrode built-up welding high-chromium alloy by the diluted prominent shadow of base material composition
The case where ringing and forming hypoeutectic structure is significantly different, illustrates that the method for the present invention significantly reduces the component diluent effect of built-up welding matrix
It answers, thus high-chromium alloy prepared by the method for the present invention has better homogeneity of ingredients and Tissue Equalization Techniques.
On the contrary, the preset mixed-powder composition on welding bead of comparative example 1 is identical with embodiment 1, only it is not prepared into
Two-layer compound powder, other bead-welding technologies are identical.As Fig. 4 and Fig. 5 it is found that high-chromium alloy tissue prepared by comparative example 1
Including M7C3, α-Fe (ferrite), (Fe, Cr)3C, minute quantity (Ti, V)2The phases such as C and austenite, wherein M includes Fe, Cr, V etc.
Metallic element.But the M of alloy prepared by comparative example 17C3Size is smaller, comes into being (Fe, Cr) with shown in Fig. 17C3The size of phase differs
Excessive, this absolutely proves that two-layer compound powder prepared by the present invention changed dramatically the tissue morphology of high-chromium alloy.
Moreover, Fig. 6 is shown, the tissue and embodiment of high-chromium alloy prepared by the comparative example 1 and the interface Q235A
1 it is significantly different, be typical hypoeutectic structure, mainly by the α-Fe (ferrite) or austenite of born of the same parents' shape, along brilliant M7C3Xiang He
(Fe,Cr)3The carbide such as C and a small amount of (Ti, V)2C phase composition, by base material Q235A component diluent feature clearly.
In addition, high-chromium alloy prepared by comparative example 1, is presented unconspicuous hypereutectic or eutectic group because of cooling fast in addition to surface layer
Feature is knitted, hardfacing alloy middle layer and interface are hypoeutectic structure.This further illustrates that high chromium prepared by comparative example 1 closes
Gold by base material composition it is diluted influence it is particularly evident, it is difficult to obtain the high-chromium alloy layer of ingredient and Tissue Equalization Techniques.
The wear morphologies of two kinds of high-chromium alloys shown in comparison diagram 7 and Fig. 8 is it is found that under the conditions of identical wear test, this hair
High-chromium alloy wear surface scratch negligible amounts prepared by bright method, and many scratches encounter block phase and change direction or
Stop, wear mechanism is mainly the micro cutting of abrasive grain；And the 1# high-chromium alloy of preset same powder component shown in comparative example 1
Wear surface scratch is more, and scratch is coherent, has no suspension phenomenon, wear mechanism is also the micro cutting of abrasive grain.The above knot
Fruit shows that high-chromium alloy prepared by the present invention has good wearability and higher toughness, can be used for zero under abrasive wear operating condition
Component submerged arc overlay welding wearing layer.
Claims (9)
1. a kind of method of two-layer compound powder and submerged arc overlay welding high-chromium alloy, it is characterised in that including following steps in sequence:
(1) alloy compositions powder mixes: each alloy compositions powder being sieved respectively, matches and claims according to each alloy compositions powder constituent
Amount, is put into same container, is sufficiently stirred and is allowed to uniformly mixed, forms mixed-powder；
Each alloy compositions powder constituent proportion are as follows: the chrome content that weight percentage is 75~80% is 68~72%, contains
The high carbon ferro-chrome (FeCr70C8.0) that carbon amounts is 8%；The vanadium iron that the vanadium content that weight percentage is 9~12% is 50%
(FeV50-A)；The ferrotianium (FeTi30A) that the titaniferous amount that weight percentage is 2~4% is 25~35%；Weight percentage
It is not less than 98% crystalline flake graphite (C) for 6~8% phosphorus content；Surplus is the reduced iron powder (Fe) that iron-content is not less than 98%；
(2) mixed-powder bonded pelleting: the annex solution class binder into mixed-powder obtained by step (1) constantly stirs during addition
It mixes, and makes rotary powder, stand 1~2 hour with sizing, obtain the wet Composite particle of almost spherical；
(3) wet Composite particle surface adhesion activating agent: the wet Composite particle after step (2) sizing is spread out, and keeps its accumulation high
Degree is less than 10mm, sprays fine activating agent to Composite particle surface, during spraying, it is uniform to be allowed to surface slightly to stir powder
One layer of activating agent is adhered to, two-layer compound powder is formed；
(4) two-layer compound powder is sintered: the container for filling two-layer compound powder obtained by step (3) being put into sintering furnace, is heated up
To sintering temperature, 2~4 hours are kept the temperature, is come out of the stove after cooling to room temperature with the furnace；
(5) two-layer compound powder is sieved: the two-layer compound powder after step (4) is come out of the stove first crosses 10 meshes, and removal is greater than 10 mesh
Powder, then it is crossed into 30 meshes, removes the powder less than 30 mesh, acquisitions granularity is 10 mesh~30 mesh two-layer compound powder；
(6) submerged arc overlay welding high-chromium alloy: setting automatic welder bead-welding technology parameter, and make each built-up welding parameter constant；In welding bead
On, two-layer compound powder made from initialization step (5) adjusts preset powder layer height and width, makes double on unit length welding bead
The layer preset weight of Composite particle and the ratio of solid welding wire fusing weight on this section of welding bead meet sets requirement, then preset at this
Two-layer compound powder particle surface covers the granular fysed flux that upper a layer thickness is not less than 10mm；
Submerged-arc welding is carried out using the two-layer compound powder and solid welding wire as resurfacing welding material, makes two-layer compound powder melt and solid
The fusion of welding wire molten drop is integrated molten bath；The molten bath cooled and solidified forms first layer weld seam, is air-cooled to the tilting of weld seam slag and falls off；
Then the built-up welding second layer and third layer are distinguished in the same way, obtain high-chromium alloy.
2. the method for two-layer compound powder and submerged arc overlay welding high-chromium alloy according to claim 1, it is characterised in that: step
(1) in, each alloy compositions powder is crossed into 60 meshes respectively.
3. the method for two-layer compound powder and submerged arc overlay welding high-chromium alloy according to claim 1, it is characterised in that: step
(2) in, the liquid class binder is the silicic acid sodium form waterglass that Baume degrees is 20~40, modulus is 3.0~3.3；Liquid class bonding
It is 15~25ml silicic acid sodium form waterglass/100g mixed-powder that cubical content and the ratio of mixed-powder weight are added in agent.
4. the method for two-layer compound powder and submerged arc overlay welding high-chromium alloy according to claim 1, it is characterised in that: step
(3) in, the fine activating agent is the fluorination sodium powder (NaF) of 300 mesh of granularity；Activating agent adds contained by weight and Composite particle
The ratio of mixed-powder weight is that 0.5~1.5g is fluorinated sodium powder/100g mixed-powder.
5. the method for two-layer compound powder and submerged arc overlay welding high-chromium alloy according to claim 1, it is characterised in that: step
(4) in, the sintering temperature is 300~400 DEG C.
6. the method for two-layer compound powder and submerged arc overlay welding high-chromium alloy according to claim 1, it is characterised in that: step
(6) in, on the unit length welding bead on the preset weight of two-layer compound powder and this section of welding bead solid welding wire fusing weight ratio
Value is 0.70~1.00.
7. the method for two-layer compound powder and submerged arc overlay welding high-chromium alloy according to claim 1, it is characterised in that: step
(6) in, the automatic welder bead-welding technology parameter is, current control value is 480~520A, carriage walking 15~17m/h of speed,
Polarity is DC reverse connection.
8. the method for two-layer compound powder and submerged arc overlay welding high-chromium alloy according to claim 1, it is characterised in that: step
(6) in, the solid welding wire is the H08A solid welding wire of diameter of phi 2.5mm~Φ 3.0mm.
9. the method for two-layer compound powder and submerged arc overlay welding high-chromium alloy according to claim 1, it is characterised in that: step
(6) in, the granular fysed flux is HJ260.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811380838.2A CN109226942B (en) | 2018-11-20 | 2018-11-20 | Method for submerged arc overlaying welding of high-chromium alloy by double-layer composite powder particles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811380838.2A CN109226942B (en) | 2018-11-20 | 2018-11-20 | Method for submerged arc overlaying welding of high-chromium alloy by double-layer composite powder particles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109226942A true CN109226942A (en) | 2019-01-18 |
| CN109226942B CN109226942B (en) | 2020-09-29 |
Family
ID=65076039
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811380838.2A Active CN109226942B (en) | 2018-11-20 | 2018-11-20 | Method for submerged arc overlaying welding of high-chromium alloy by double-layer composite powder particles |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109226942B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11285846A (en) * | 1998-03-31 | 1999-10-19 | Mazda Motor Corp | Joining method of metallic member |
| CN1946876A (en) * | 2004-02-16 | 2007-04-11 | 凯文·弗朗西斯·道曼 | Hardfacing ferroalloy materials |
| CN102152020A (en) * | 2011-01-31 | 2011-08-17 | 山东博润工业技术有限公司 | Coating powder for submerged arc surfacing of low-carbon steel and application method thereof |
| CN102513647A (en) * | 2011-12-29 | 2012-06-27 | 上海鸿威硬面技术有限公司 | Process for surfacing welding composite hard-surface nickel-base alloy high-temperature material on surface of wrapper roll |
| CN104668817A (en) * | 2015-01-28 | 2015-06-03 | 辽宁工程技术大学 | Coal ash activated argon arc welding flux and application thereof |
| CN104708226A (en) * | 2015-02-12 | 2015-06-17 | 西安理工大学 | Titanium carbide type self-protective wear-resistant bead weld flux-cored wire and preparation method thereof |
| CN108406167A (en) * | 2017-02-09 | 2018-08-17 | 奥林康焊接技术有限公司 | Sintered flux and the austenitic stainless steel buried arc welding method for using the solder flux |
-
2018
- 2018-11-20 CN CN201811380838.2A patent/CN109226942B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11285846A (en) * | 1998-03-31 | 1999-10-19 | Mazda Motor Corp | Joining method of metallic member |
| CN1946876A (en) * | 2004-02-16 | 2007-04-11 | 凯文·弗朗西斯·道曼 | Hardfacing ferroalloy materials |
| CN102152020A (en) * | 2011-01-31 | 2011-08-17 | 山东博润工业技术有限公司 | Coating powder for submerged arc surfacing of low-carbon steel and application method thereof |
| CN102513647A (en) * | 2011-12-29 | 2012-06-27 | 上海鸿威硬面技术有限公司 | Process for surfacing welding composite hard-surface nickel-base alloy high-temperature material on surface of wrapper roll |
| CN104668817A (en) * | 2015-01-28 | 2015-06-03 | 辽宁工程技术大学 | Coal ash activated argon arc welding flux and application thereof |
| CN104708226A (en) * | 2015-02-12 | 2015-06-17 | 西安理工大学 | Titanium carbide type self-protective wear-resistant bead weld flux-cored wire and preparation method thereof |
| CN108406167A (en) * | 2017-02-09 | 2018-08-17 | 奥林康焊接技术有限公司 | Sintered flux and the austenitic stainless steel buried arc welding method for using the solder flux |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109226942B (en) | 2020-09-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102990058B (en) | Oxide particle reinforced laser-clad high abrasion resistance cobalt-base alloy powder and preparation method thereof | |
| CN100575553C (en) | A kind of laser cladding Co-based alloy powder for conductor roll | |
| CA1276843C (en) | Composite hard chromium compounds for thermal spraying | |
| CN105033507B (en) | A kind of welding rod special for special repairing built-up welding for hot-work die | |
| CN102899664A (en) | Laser cladding alloy powder and preparation method thereof | |
| CN102990060B (en) | Silicide particle reinforced laser-clad high abrasion resistance nickel-base alloy powder and preparation method thereof | |
| CN102912188A (en) | Laser cladding nickel-based alloy powder and preparation method thereof | |
| CN102912189A (en) | Laser-cladding cobalt-based alloy powder and method for preparing same | |
| CN101187022A (en) | Laser cladding Co-based alloy powder for conductor roll | |
| CN105132913B (en) | A kind of laser cladding alloy powder remanufactured for hot-work die reparation | |
| CN110549035B (en) | Composite powder of submerged arc surfacing high-boron alloy and application method thereof | |
| CN104250801A (en) | Process for performing laser cladding on alloy coating with characteristics of wear resistance and heat resistance by hot rolling of seamless steel pipe | |
| CN109355652A (en) | Laser melting coating Co-based alloy powder and preparation method thereof | |
| CN105081612B (en) | A kind of plasma arc surfacing alloy powder for hot-work die | |
| CN112404672B (en) | Composite powder particles of titanium carbide phase reinforced iron-based surfacing alloy and application method thereof | |
| CN109351957A (en) | Laser melting coating iron(-)base powder and preparation method thereof | |
| CN109290698A (en) | The method for preparing high boron alloy as resurfacing welding material using Composite particle and solid welding wire | |
| CN110549034B (en) | Composite powder of open arc surfacing austenite high-chromium alloy and application method thereof | |
| CN105483698A (en) | Cladding method for compounding tungsten carbide on high-chromium cast iron roller shell | |
| CN102990059B (en) | Silicide particle reinforced laser-clad high abrasion resistance cobalt-base alloy powder and preparation method thereof | |
| CN104308390B (en) | The flux-cored wire and preparation method of fabricated in situ WC particle enhancing iron-based composite coating | |
| CN100347332C (en) | Low hardness high-performance glass mold and cast-iron flame-spray welding nickel base alloy powder | |
| CN103170619A (en) | Silicide particle enhanced laser-cladding alloy powder and preparation method thereof | |
| CN105624470A (en) | Iron-nickel-based composite alloy powder for laser cladding and laser cladding method of powder | |
| CN109365957B (en) | Multilayer composite powder and self-protection open arc surfacing high-chromium alloy method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |