CN109940308A - A kind of laser melting coating iron-based welding wire and preparation method thereof - Google Patents
A kind of laser melting coating iron-based welding wire and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a kind of iron-based welding wires of laser melting coating, including medicine core and weldering skin, wherein medicine core is composed of the following components by mass percentage: B powder 1.7~6.5%, ferrosilicon powder 1.3~4.0%, ferromanganese powder 2.6~5.5%, Ni powder 10~24%, Cr powder 60~80%, the sum of above constituent mass percentage are 100%.The welding wire can realize the high rigidity that solid welding wire is difficult to realize, high abrasion cladding layer.Also disclose the preparation method of the welding wire: step 1: weighing each medicinal powder by said ratio；Step 2: the weighed each medicinal powder of step 1 being heated, is then mixed；Step 3: being wrapped in mild-carbon steel strip by the mixed powder that step 2 is prepared in flux-cored wire drawing equipment；Step 4: after the first procedure drawing, mold aperture successively being reduced, the final flux-cored wire for obtaining 1.0~1.2mm of diameter；Step 5: after flux-cored wire drawing, for use.
Description
Technical field
The invention belongs to technical field of metal material, and in particular to a kind of iron-based welding wire of laser melting coating, the present invention also relate to
And the preparation method of the welding wire.
Background technique
Laser melting coating can significantly improve the surface property of material, restore workpiece size or repair to lost material,
Have the characteristics that high-efficient, speed is fast, environmentally protective, is widely applied to almost entire mechanical processing industry.
Laser cladding of material largely determines the performance of cladding layer, and laser cladding of material can be divided into according to different shape
Powdered, silk material and bar, nowadays laser melting coating is nearly all dusty material.Laser melting coating is according to the mode of powder feeding
Difference can be divided into prefabricated powder feeding and powder feeding formula cladding, and process is tedious than the cladding of powder feeding formula for prefabricated powder, seldom apply in work
In journey practice.Process of Powder Feeding Laser Cladding requires powder very high, it is desirable that powder has certain granularity, sphericity and flowing
Property, otherwise influence whether the smoothness of powder feeding, so that the stability of cladding process is influenced, high request of the laser melting coating to powder
No doubt it will increase the manufacturing cost of powder.
The laser melting and coating technique of silk material is compared with Process of Powder Feeding Laser Cladding technology, and wire feed process accurately controls, and material is sent
Expect that precision is high, stock utilization is high, and metal wire material is more at low cost than metal powder, so silk material laser melting and coating technique has very big hair
Open up space.Currently, lateral wire feed system is mostly used to carry out laser melting coating greatly, do not used specifically for wire feed laser melting coating system
Welding wire, mostly using existing fusion welding welding wire.
Summary of the invention
The object of the present invention is to provide a kind of iron-based welding wire of laser melting coating, it can be achieved that solid welding wire is difficult to the height to be formed firmly
Degree, high abrasion cladding layer.
It is a further object to provide a kind of laser melting coating preparation methods of iron-based welding wire.
The technical scheme adopted by the invention is that a kind of iron-based welding wire of laser melting coating, including medicine core and weldering skin, Chinese medicine
Core is composed of the following components by mass percentage: B powder 1.7~6.5%, ferrosilicon powder 1.3~4.0%, ferromanganese powder 2.6~5.5%,
Ni powder 10~24%, Cr powder 60~80%, the sum of above constituent mass percentage are 100%.
The features of the present invention also characterized in that:
B powder, ferrosilicon powder, ferromanganese powder, Ni powder and Cr powder granularity be 100-200 mesh.
Weldering skin is mild-carbon steel strip, mild-carbon steel strip with a thickness of 0.4mm, the width of mild-carbon steel strip is 7mm.
Another technical solution of the present invention is a kind of above-mentioned preparation method of the iron-based welding wire of laser melting coating,
Specific step is as follows:
Step 1: weighing following medicinal powder: B powder 1.7~6.5%, ferrosilicon powder 1.3~4.0%, manganese respectively by mass percentage
Iron powder 2.6~5.5%, Ni powder 10~24%, Cr powder 60~80%, the sum of above constituent mass percentage are 100%；
Step 2: by the weighed B powder of step 1, ferrosilicon powder, ferromanganese powder, Ni powder and Cr powder be respectively placed in vacuum furnace into
Row heat treatment, heating temperature are 260~300 DEG C, soaking time 2h；By after heat treatment B powder, ferrosilicon powder, ferromanganese powder,
Ni powder and Cr powder, which are placed in, to carry out being mixed to get mixed powder, incorporation time 1h in mixed powder machine；
Step 3: using the grease on alcohol removal mild-carbon steel strip surface, by flux-cored wire drawing equipment being prepared by step 2
Obtained mixed powder is wrapped in mild-carbon steel strip, and first of drawing mould aperture is 2.6mm；
Step 4: after the first procedure drawing, mold aperture is successively reduced, it is final to obtain 1.0~1.2mm of diameter
Flux-cored wire；
Step 5: after flux-cored wire drawing, being wrapped on wire reel through spiral filament forming machine, it is true to be ultimately encapsulated in flux-cored wire
It is stand-by in empty package bag.
The features of the present invention also characterized in that
In step 1, B powder, ferrosilicon powder, ferromanganese powder, Ni powder and Cr powder granularity be 100-200 mesh.
In step 3, mild-carbon steel strip with a thickness of 0.4mm, the width of mild-carbon steel strip is 7mm.
The beneficial effects of the present invention are:
(1) laser melting coating of the invention, which is solved with iron-based welding wire, does not use dedicated for wire feed laser melting coating system
The problem of welding wire, can widen silk material laser by medicinal powder with the flexibly adjustment laser melting coating chemical cost of iron-based welding wire
The use scope of cladding；Compared to solid welding wire laser melting coating, flux-cored wire cladding is more efficient；It can be realized by deploying medicinal powder
High rigidity that solid welding wire is difficult to realize, high abrasion cladding layer, compared to powder laser cladding, flux-cored wire laser melting coating cost
Low, stock utilization is high, and wire feed precision is high；Powder in flux-cored wire only needs good fluidity to ensure that ingredient is equal in drawing process
It is even, it is high that no powder laser cladding is required to granularity and sphericity, therefore manufacturing cost is relatively low.
(2) it is raw to be convenient for extensive batch for the preparation method of laser melting coating of the invention with iron-based welding wire, simple process
It produces.
Detailed description of the invention
Fig. 1 is the flux-cored wire that in the present invention prepared by case study on implementation 2, acquired when carrying out laser melting coating on Q345 steel plate
Cladding layer scanning electron microscope macrostructure shape appearance figure；
Fig. 2 is the flux-cored wire that in the present invention prepared by case study on implementation 2, acquired when carrying out laser melting coating on Q345 steel plate
Cladding layer and Q345 steel plate between, the metallographic structure shape appearance figure of cladding layer.
Specific embodiment
With reference to the accompanying drawing and specific embodiment the present invention is described in detail.
A kind of iron-based welding wire of laser melting coating of the invention, including medicine core and weldering skin, wherein medicine core by mass percentage by
Following components composition: B powder 1.7~6.5%, ferrosilicon powder 1.3~4.0%, ferromanganese powder 2.6~5.5%, Ni powder 10~24%, Cr
Powder 60~80%, the sum of above constituent mass percentage are 100%.
B powder, ferrosilicon powder, ferromanganese powder, Ni powder and Cr powder granularity be 100-200 mesh, the filling rate control of the flux-cored wire
System is 25~30%.
Weldering skin is mild-carbon steel strip, mild-carbon steel strip with a thickness of 0.4mm, the width of mild-carbon steel strip is 7mm.
The effect of main alloying ingredient and function are as follows in the flux-cored wire:
Main alloy element of the B element as flux-cored wire, B element are strong deoxidant element, and B element and Si element joint are made
With the fusing point that can reduce cladding layer metal, the mobility of cladding layer metal is improved, improves the wetability with basis material.
Main alloy element of the Si element as flux-cored wire, addition Si element can be reduced molten in the metal of cladding layer containing Mn
The oxygen content in metal is covered, prevents the generation of stomata, hardness, the intensity of cladding layer metal are in non-linear increase.
Main alloy element of the Mn element as flux-cored wire, addition Mn element can refine crystal grain in cladding layer metal,
Mn and Si joint can play the purpose of deoxidation, and the hardness and strength of cladding layer metal can be improved；
Main alloy element of the Ni element as flux-cored wire will promote after increasing Ni element in high Mn cladding layer metal
Into the generation of martensite, hardness, the intensity of cladding layer metal are improved；Ni element is added in low Mn cladding layer metal, can be mentioned
The anti-cleavage fracture ability of high cladding layer metal；
Main alloy element of the Cr element as flux-cored wire, add Cr element after, Cr react with B by generation CrB and
Cr2B, Cr and C, which react, will generate Cr23C6And Cr7C3Etc. hard compounds, the hardness and wearability of cladding layer metal can be improved；
A kind of preparation method of the above-mentioned iron-based welding wire of laser melting coating, the specific steps are as follows:
Step 1: weighing following medicinal powder: B powder 1.7~6.5%, ferrosilicon powder 1.3~4.0%, manganese respectively by mass percentage
Iron powder 2.6~5.5%, Ni powder 10~24%, Cr powder 60~80%, the sum of above constituent mass percentage are 100%；
Step 2: by the weighed B powder of step 1, ferrosilicon powder, ferromanganese powder, Ni powder and Cr powder be respectively placed in vacuum furnace into
Row heat treatment, heating temperature are 260~300 DEG C, soaking time 2h, remove the crystallization water in medicinal powder；After heating
B powder, ferrosilicon powder, ferromanganese powder, Ni powder and Cr powder be placed in mixed powder machine and carry out adequately being mixed to get mixed powder, when mixing
Between be 1h；
Step 3: using the grease on alcohol removal mild-carbon steel strip surface, by flux-cored wire drawing equipment being prepared by step 2
Obtained mixed powder is wrapped in mild-carbon steel strip, and first of drawing mould aperture is 2.6mm；
Step 4: after the first procedure drawing, mold aperture is successively reduced, it is final to obtain 1.0~1.2mm of diameter
Flux-cored wire；
Step 5: after flux-cored wire drawing, being wrapped on wire reel through spiral filament forming machine, it is true to be ultimately encapsulated in flux-cored wire
It is stand-by in empty package bag.
In step 1, B powder, ferrosilicon powder, ferromanganese powder, Ni powder and Cr powder granularity be 100-200 mesh.
In step 3, mild-carbon steel strip with a thickness of 0.4mm, the width of mild-carbon steel strip is 7mm.
Embodiment 1
A kind of preparation method of the iron-based welding wire of laser melting coating:
Step 1: weigh following medicinal powder: B powder 1.7% respectively by mass percentage, ferrosilicon powder 1.3%, ferromanganese powder 2.6%,
Ni powder 24%, Cr powder 70.4%, the sum of above constituent mass percentage are 100%；
Step 2: by the weighed B powder of step 1, ferrosilicon powder, ferromanganese powder, Ni powder and Cr powder be respectively placed in vacuum furnace into
Row heat treatment, heating temperature are 260 DEG C, soaking time 2h, remove the crystallization water in medicinal powder；By after heat treatment B powder,
Ferrosilicon powder, ferromanganese powder, Ni powder and Cr powder, which are placed in, to carry out adequately being mixed to get mixed powder in mixed powder machine, and incorporation time is
1h；
Step 3: using the grease on alcohol removal mild-carbon steel strip surface, by flux-cored wire drawing equipment being prepared by step 2
Obtained mixed powder is wrapped in mild-carbon steel strip, and first of drawing mould aperture is 2.6mm；Mild-carbon steel strip with a thickness of
0.4mm, the width of mild-carbon steel strip are 7mm；
Step 4: after the first procedure drawing, mold aperture successively being reduced, the final medicine core for obtaining diameter 1.0mm
Welding wire.
Step 5: after flux-cored wire drawing, being wrapped on wire reel through spiral filament forming machine, it is true to be ultimately encapsulated in flux-cored wire
It is stand-by in empty package bag.
Laser melting coating, laser function are carried out on Q345 steel plate with iron-based flux-cored wire with laser melting coating prepared by embodiment 1
Rate 3000W, spot diameter 2mm, scanning speed 3m/min, wire feed rate 0.8m/min.
After tested, the Rockwell hardness of cladding layer metal is 48HRC.
Embodiment 2
A kind of preparation method of the iron-based welding wire of laser melting coating:
Step 1: weigh following medicinal powder: B powder 6.5% respectively by mass percentage, ferrosilicon powder 4.0%, ferromanganese powder 5.5%,
Ni powder 10%, Cr powder 74%, the sum of above constituent mass percentage are 100%；
Step 2: by the weighed B powder of step 1, ferrosilicon powder, ferromanganese powder, Ni powder and Cr powder be respectively placed in vacuum furnace into
Row heat treatment, heating temperature are 300 DEG C, soaking time 2h, remove the crystallization water in medicinal powder；By after heat treatment B powder,
Ferrosilicon powder, ferromanganese powder, Ni powder and Cr powder, which are placed in, to carry out adequately being mixed to get mixed powder in mixed powder machine, and incorporation time is
1h；
Step 3: using the grease on alcohol removal mild-carbon steel strip surface, by flux-cored wire drawing equipment being prepared by step 2
Obtained mixed powder is wrapped in mild-carbon steel strip, and first of drawing mould aperture is 2.6mm；Mild-carbon steel strip with a thickness of
0.4mm, the width of mild-carbon steel strip are 7mm；
Step 4: after the first procedure drawing, mold aperture successively being reduced, the final medicine core for obtaining diameter 1.2mm
Welding wire.
Step 5: after flux-cored wire drawing, being wrapped on wire reel through spiral filament forming machine, it is true to be ultimately encapsulated in flux-cored wire
It is stand-by in empty package bag.
Laser melting coating, laser function are carried out on Q345 steel plate with iron-based flux-cored wire with laser melting coating prepared by embodiment 2
Rate 3000W, spot diameter 2mm, scanning speed 3m/min, wire feed rate 0.8m/min.
After tested, the Rockwell hardness of cladding layer metal is 58HRC.
The cladding on Q345 steel plate of the iron-based flux-cored wire of the laser melting coating that embodiment 2 is prepared, cladding layer weld seam are swept
Retouch Electronic Speculum macrostructure as shown in Figure 1, Fig. 2 is cladding layer and Q345 matrix metallographic structure pattern.From low power scanning electron microscopic picture
Upper can be seen that is connected good between cladding layer and Q345 matrix, the welding defects such as no macroscopic cracking.It can from metallograph
Out, it is separated between cladding layer and Q345 matrix with melt run, melt run is clear, and melt run does not find that crackle, stomata etc. are normal nearby
See defect, cladding layer is mainly made of cellular dendritic crystals.
Embodiment 3
A kind of preparation method of the iron-based welding wire of laser melting coating:
Step 1: weigh following medicinal powder: B powder 6.5% respectively by mass percentage, ferrosilicon powder 4.0%, ferromanganese powder 5.5%,
Ni powder 24%, Cr powder 60%, the sum of above constituent mass percentage are 100%；
Step 2: by the weighed B powder of step 1, ferrosilicon powder, ferromanganese powder, Ni powder and Cr powder be respectively placed in vacuum furnace into
Row heat treatment, heating temperature are 280 DEG C, soaking time 2h, remove the crystallization water in medicinal powder；By after heat treatment B powder,
Ferrosilicon powder, ferromanganese powder, Ni powder and Cr powder, which are placed in, to carry out adequately being mixed to get mixed powder in mixed powder machine, and incorporation time is
1h；
Step 3: using the grease on alcohol removal mild-carbon steel strip surface, by flux-cored wire drawing equipment being prepared by step 2
Obtained mixed powder is wrapped in mild-carbon steel strip, and first of drawing mould aperture is 2.6mm；Mild-carbon steel strip with a thickness of
0.4mm, the width of mild-carbon steel strip are 7mm；
Step 4: after the first procedure drawing, mold aperture successively being reduced, the final medicine core for obtaining diameter 1.1mm
Welding wire.
Step 5: after flux-cored wire drawing, being wrapped on wire reel through spiral filament forming machine, it is true to be ultimately encapsulated in flux-cored wire
It is stand-by in empty package bag.
Laser melting coating prepared with embodiment 3 carries out laser melting coating, laser function with iron-based flux-cored wire on Q345 steel plate
Rate 3000W, spot diameter 2mm, scanning speed 3m/min, wire feed rate 0.8m/min.
After tested, the Rockwell hardness of cladding layer metal is 53HRC.
Embodiment 4
A kind of preparation method of the iron-based welding wire of laser melting coating:
Step 1: weighing following medicinal powder: B powder 2%, ferrosilicon powder 2%, ferromanganese powder 3%, Ni powder respectively by mass percentage
13%, Cr powder 80%, the sum of above constituent mass percentage are 100%；
Step 2: by the weighed B powder of step 1, ferrosilicon powder, ferromanganese powder, Ni powder and Cr powder be respectively placed in vacuum furnace into
Row heat treatment, heating temperature are 300 DEG C, soaking time 2h, remove the crystallization water in medicinal powder；By after heat treatment B powder,
Ferrosilicon powder, ferromanganese powder, Ni powder and Cr powder, which are placed in, to carry out adequately being mixed to get mixed powder in mixed powder machine, and incorporation time is
1h；
Step 3: using the grease on alcohol removal mild-carbon steel strip surface, by flux-cored wire drawing equipment being prepared by step 2
Obtained mixed powder is wrapped in mild-carbon steel strip, and first of drawing mould aperture is 2.6mm；Mild-carbon steel strip with a thickness of
0.4mm, the width of mild-carbon steel strip are 7mm；
Step 4: after the first procedure drawing, mold aperture successively being reduced, the final medicine core for obtaining diameter 1.0mm
Welding wire.
Step 5: after flux-cored wire drawing, being wrapped on wire reel through spiral filament forming machine, it is true to be ultimately encapsulated in flux-cored wire
It is stand-by in empty package bag.
Laser melting coating, laser function are carried out on Q345 steel plate with iron-based flux-cored wire with laser melting coating prepared by embodiment 4
Rate 3000W, spot diameter 2mm, scanning speed 3m/min, wire feed rate 0.8m/min.
After tested, the Rockwell hardness of cladding layer metal is 45HRC.
Embodiment 5
A kind of preparation method of the iron-based welding wire of laser melting coating:
Step 1: weighing following medicinal powder: B powder 4%, ferrosilicon powder 3%, ferromanganese powder 4%, Ni powder respectively by mass percentage
20%, Cr powder 69%, the sum of above constituent mass percentage are 100%；
Step 2: by the weighed B powder of step 1, ferrosilicon powder, ferromanganese powder, Ni powder and Cr powder be respectively placed in vacuum furnace into
Row heat treatment, heating temperature are 260 DEG C, soaking time 2h, remove the crystallization water in medicinal powder；By after heat treatment B powder,
Ferrosilicon powder, ferromanganese powder, Ni powder and Cr powder, which are placed in, to carry out adequately being mixed to get mixed powder in mixed powder machine, and incorporation time is
1h；
Step 3: using the grease on alcohol removal mild-carbon steel strip surface, by flux-cored wire drawing equipment being prepared by step 2
Obtained mixed powder is wrapped in mild-carbon steel strip, and first of drawing mould aperture is 2.6mm；Mild-carbon steel strip with a thickness of
0.4mm, the width of mild-carbon steel strip are 7mm；
Step 4: after the first procedure drawing, mold aperture successively being reduced, the final medicine core for obtaining diameter 1.2mm
Welding wire.
Step 5: after flux-cored wire drawing, being wrapped on wire reel through spiral filament forming machine, it is true to be ultimately encapsulated in flux-cored wire
It is stand-by in empty package bag.
Laser melting coating, laser function are carried out on Q345 steel plate with iron-based flux-cored wire with laser melting coating prepared by embodiment 5
Rate 3000W, spot diameter 2mm, scanning speed 3m/min, wire feed rate 0.8m/min.
After tested, the Rockwell hardness of cladding layer metal is 50HRC.
It is optimized flux-cored wire medicinal powder filling rate control 25%~30% when, mass percent be 6.5% B powder,
4.0% ferrosilicon, 5.5% manganese iron, 10% Ni powder, in the case where 74% Cr powder, laser melting coating Q345 steel plate can be obtained
, defect best to molding effect be minimum and the preferable laser cladding layer of mechanical property.
Claims (6)
1. a kind of iron-based welding wire of laser melting coating, which is characterized in that including medicine core and weldering skin, wherein medicine core by mass percentage by
Following components composition: B powder 1.7~6.5%, ferrosilicon powder 1.3~4.0%, ferromanganese powder 2.6~5.5%, Ni powder 10~24%, Cr
Powder 60~80%, the sum of above constituent mass percentage are 100%.
2. a kind of iron-based welding wire of laser melting coating according to claim 1, which is characterized in that B powder, ferrosilicon powder, ferromanganese powder,
The granularity of Ni powder and Cr powder is 100-200 mesh.
3. a kind of iron-based welding wire of laser melting coating according to claim 1, which is characterized in that weldering skin is mild-carbon steel strip, low
Carbon steel band with a thickness of 0.4mm, the width of mild-carbon steel strip is 7mm.
4. a kind of laser melting coating preparation method of iron-based welding wire, which is characterized in that specific step is as follows:
Step 1: weighing following medicinal powder: B powder 1.7~6.5%, ferrosilicon powder 1.3~4.0%, ferromanganese powder respectively by mass percentage
2.6~5.5%, Ni powder 10~24%, Cr powder 60~80%, the sum of above constituent mass percentage are 100%；
Step 2: the weighed B powder of step 1, ferrosilicon powder, ferromanganese powder, Ni powder and Cr powder are respectively placed in vacuum furnace and are added
Heat treatment, heating temperature are 260~300 DEG C, soaking time 2h；By B powder, ferrosilicon powder, ferromanganese powder, the Ni powder after heat treatment
And Cr powder is placed in and carries out being mixed to get mixed powder, incorporation time 1h in mixed powder machine；
Step 3: using the grease on alcohol removal mild-carbon steel strip surface, step 2 being prepared by flux-cored wire drawing equipment
Mixed powder be wrapped in mild-carbon steel strip, first drawing mould aperture is 2.6mm；
Step 4: after the first procedure drawing, mold aperture successively being reduced, the final medicine for obtaining 1.0~1.2mm of diameter
Core welding wire；
Step 5: after flux-cored wire drawing, being wrapped on wire reel through spiral filament forming machine, be ultimately encapsulated in flux-cored wire vacuum packet
It is stand-by in pack.
5. a kind of preparation method of the iron-based welding wire of laser melting coating according to claim 4, which is characterized in that in step 1,
B powder, ferrosilicon powder, ferromanganese powder, Ni powder and Cr powder granularity be 100-200 mesh.
6. a kind of preparation method of the iron-based welding wire of laser melting coating according to claim 4, which is characterized in that in step 3,
The mild-carbon steel strip with a thickness of 0.4mm, the width of the mild-carbon steel strip is 7mm.
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| CN110744221A (en) * | 2019-11-29 | 2020-02-04 | 西安理工大学 | Welding wire for TA1-Cu-Q345 transition layer, method and groove form |
| CN113199169A (en) * | 2021-04-25 | 2021-08-03 | 西安理工大学 | Ni-Cr-based welding wire for laser additive manufacturing and preparation method thereof |
| CN114260615A (en) * | 2021-12-28 | 2022-04-01 | 西安热工研究院有限公司 | Welding wire for welding T91-TP304H dissimilar materials and preparation method thereof |
| CN114571127A (en) * | 2022-03-30 | 2022-06-03 | 西安理工大学 | Welding wire for surfacing of composite carbide reinforced scraper and preparation method thereof |
| CN115287573A (en) * | 2022-05-04 | 2022-11-04 | 南京农业大学 | Iron-based Al-containing alloy 2 O 3 /B 4 High-speed electric arc spraying powder core wire material of C composite ceramic and preparation method of coating |
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| CN114571127A (en) * | 2022-03-30 | 2022-06-03 | 西安理工大学 | Welding wire for surfacing of composite carbide reinforced scraper and preparation method thereof |
| CN114571127B (en) * | 2022-03-30 | 2024-02-13 | 西安理工大学 | Welding wire for surfacing of composite carbide reinforced scraping plate and preparation method |
| CN115287573A (en) * | 2022-05-04 | 2022-11-04 | 南京农业大学 | Iron-based Al-containing alloy 2 O 3 /B 4 High-speed electric arc spraying powder core wire material of C composite ceramic and preparation method of coating |
| CN115287573B (en) * | 2022-05-04 | 2023-08-04 | 南京农业大学 | Iron-based Al-containing alloy 2 O 3 /B 4 Preparation method of high-speed electric arc spraying powder core wire and coating of C composite ceramic |
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