CN106480363B - 30CrMnSiNi2A steel laser cladding powder and preparation method - Google Patents
30CrMnSiNi2A steel laser cladding powder and preparation method Download PDFInfo
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- CN106480363B CN106480363B CN201611026294.0A CN201611026294A CN106480363B CN 106480363 B CN106480363 B CN 106480363B CN 201611026294 A CN201611026294 A CN 201611026294A CN 106480363 B CN106480363 B CN 106480363B
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/00—Ferrous alloys, e.g. steel alloys
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- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
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Abstract
The present invention relates to 30CrMnSiNi2A steel laser cladding powder and preparation methods, the amount of each component is Cr0.8% 1.0% by weight percentage in the laser cladding powder, Mn0.75% 1.10%, Si0.65% 1.10%, Ni2.0% 3.2%, C0.16% 0.22%, Cu0.15% 0.20%, P0.015% 0.020%, S0.01% 0.015%, rare earth 0.001% 0.015%, surplus is iron.Present invention further propose that the preparation method of cladding powder, laser cladding powder is exclusively used in the laser melting and coating technique of 30CrMnSiNi2A steel, ensure the excellent bond strength in cladding interface, the dilution rate of lower metallurgical imperfection and reduction, and improve the toughness of cladding layer, the wetability of cladding powder is changed, cladding layer is inhibited to crack and delay crack growth rate.
Description
Technical field
The present invention relates to laser melting and coating techniques, and in particular to 30CrMnSiNi2A steel laser cladding powder and preparation side
Method.
Background technology
30CrMnSiNi2A ultrafort steels are because it is with higher intensity, good plasticity, toughness and quenching degree and good
Antifatigue and abrasion resistance etc., is widely used in the important forging of aviation, sheet metal component and weldment, such as wing crossbeam, connection spiral shell
The primary structure members such as bolt, undercarriage.30CrMnSiNi2Tensile strength (the σ of A ultrafort steelsb) up to 1600~1800MPa, fracture toughness
(KIc) up to 105MPa/m, it cools down in the oil, quenching degree diameter of section can reach 50mm or more.However aircraft is under service condition
High-frequency vibration be easy to make parts to generate fatigue failure, most of crackles originate from workpiece surface, and harmfulness is suitable
Big；In addition, 30CrMnSiNi2A is more sensitive to notch, it is breakneck that corrosion, which occurs, in key position, using traditional
Renovation technique is susceptible to crackle, it is most important that workpiece can be made to generate the deformation beyond tolerance.In recent years, laser melting coating
Technology is quickly grown, and is widely used in the reparation of aviation part etc..
Laser melting and coating technique is a kind of use laser beam heats cladding material and matrix surface, makes required special material melting welding
In the new surface modifications technology of piece surface.The principle of laser melting coating refers to being added cladding material with different adding material modes
To on by the surface of cladding matrix, using the laser emission of high-energy-density to matrix surface, make matrix surface thin layer and cladding material
Material rapid melting simultaneously solidifies generation metallurgical binding, significantly improves the wear resistance and corrosion resistance of matrix surface.Laser melting coating and conventional surface
Engineering is compared, and heat input is relatively low, and the thermal deformation of material is small, and energy consumption is small, theoretically can be on a variety of materials surface layer using flexible
Using laser melting and coating technique, and following process very little or need not process.In addition, the chilling in laser cladding process can make
The tissue of cladding layer is finer and close, and crystal grain more refines, to make mechanical property be significantly improved.
Laser cladding of material refers mainly to form the material used in consolidation layer, to obtain the ideal laser cladding layer of performance,
The selection of cladding material is most important, it is necessary to should meet part operating mode and the requirement of laser melting coating common processes.Cladding material is not
But there is good laser melting coating performance, and the metallurgical compatibility that cladding material should have with base material, can be formed uniformly
Combination interface.Under normal conditions, first, cladding material and parent metal coefficient of thermal expansion are as close as possible, if the two
Coefficient of thermal expansion difference is too big, then cladding layer is also easy to produce crackle and even peels off；Second is that the fusing point of cladding material and parent metal is wanted
It is close；Third, should have good wetability between cladding material and parent metal.
Currently, dedicated laser cladding powder powder material shortage is the key that restrict laser melting and coating technique engineer application and popularization
One of factor.Mostly using hot spray powder as raw material, existing main problem is because swashing for the implementation of existing many melting and coating process
Optical energy density bigger causes ingredient scaling loss in cladding process serious, and powder flowbility is insufficient.It is super for 30CrMnSiNi2A
The laser cladding powder correlative study report of strong steel matrix is less, because its tensile strength is up to 1600~1800MPa, elongation of having no progeny
Rate is maintained at 10% or so, larger using laser melting coating difficulty, and difficulty is to be difficult to ensure that laser cladding layer reaches and parent
Consistent or close intensity and toughness matching.It is a variety of that Co50, Ni60, GH4169, AF1410, Fe90 etc. are used in the prior art
The superpower steel matrix of existing hot spraying powder foot couple 30CrMnSiNi2A has carried out cladding reparation, is extremely difficult to preferable effect.It is main
The mass defect wanted is that cladding layer dilution rate is high, cladding layer porosity is high, cladding bed boundary melts bad, oxidation folder there are more
Miscellaneous and micro-crack, cladding layer aoxidize serious etc..
Invention content
It is an object of the invention to provide 30CrMnSiNi2A steel laser melting coatings for overcome the deficiencies in the prior art
Powder and preparation method.The main component of the laser cladding powder of the present invention is close with the composition of 30CrMnSiNi2A steel, and this
Invention further provides the preparation method of laser cladding powder, and the laser cladding powder in the present invention is exclusively used in
In the laser melting and coating technique of 30CrMnSiNi2A ultrafort steels, ensure the excellent bond strength in cladding interface, lower metallurgical imperfection
With the dilution rate of reduction, and the toughness of cladding layer is improved, improve the wetability of cladding powder, cladding layer is inhibited to crack and delay
Crack growth rate.
In order to achieve the above technical purposes, the technical solution adopted by the present invention is：
30CrMnSiNi2A steel laser cladding powders, each component in the 30CrMnSiNi2A steel laser cladding powder
It measures and is by weight percentage：Cr 0.8%-1.0%, Mn 0.75%-1.10%, Si 0.65%-1.10%, Ni 2.0%-
3.2%, C 0.16%-0.22%, Cu 0.15%-0.20%, P 0.015%-0.020%, S 0.01%-0.015% is dilute
Native 0.001%-0.015%, surplus are iron.
The further preferred scheme of 30CrMnSiNi2A steel laser cladding powder proposed by the present invention is：
Wherein, the amount of each component is by weight percentage in the 30CrMnSiNi2A steel laser cladding powder：Cr
0.85%-0.95%, Mn 0.85%-1.0%, Si 0.80%-1.0%, Ni 2.3%-3.0%, C 0.18%-0.20%,
Cu 0.15%-0.18%, P 0.015%-0.018%, S 0.01%-0.013%, rare earth 0.005%-0.013%, surplus
For iron.
Further preferably, the amount of each component is by weight percentage in the 30CrMnSiNi2A steel laser cladding powder
For：Cr 0.90%-0.95%, Mn 0.90%-1.0%, Si 0.85%-0.90%, Ni 2.5%-2.7%, C 0.18%-
0.19%, Cu 0.15%-0.17%, P 0.015%-0.016%, S 0.01%-0.013%, rare earth 0.008%-
0.010%, surplus is iron.
Most preferably, the amount of each component in the 30CrMnSiNi2A steel laser cladding powder is by weight percentage：
Cr 0.9%, Mn 1.0%, Si 0.85%, Ni 2.6%, C 0.19%, Cu 0.15%, P 0.015%, S 0.012%,
Rare earth 0.009%, surplus are iron.
Wherein, at least one of rare earth La, Ce, Y, preferably La.
Wherein, the size of 30CrMnSiNi2A steel laser cladding powder proposed by the present invention includes micron order and nanometer
Grade, the wherein weight ratio of micron order and nano level laser cladding powder are 10-20:1.Wherein, micron-sized laser cladding powder
The average grain diameter at end is 40-200 μm；The average grain diameter of nano level laser cladding powder is 80-350nm.Wherein, described
The microscopic appearance of 30CrMnSiNi2A steel laser cladding powder is spherical.
The preparation method of the special laser cladding powder of 30CrMnSiNi2A ultrafort steels proposed by the present invention, the present invention directly with
30CrMnSiNi2A base materials are the body material of laser cladding powder, by adding Fe/Ni/ on the basis of the body material
Rare earth alloy is prepared；Preparation method includes mixing raw material 30CrMnSiNi2A bars and Fe/Ni/ rare earth alloy powders to melt
Melt, then is prepared by being atomized to be granulated.Wherein, the Fe/Ni/ rare earth alloy powders are by melting, tundish refining, Gao Zhen
Empty deoxygenation refining is made.
Wherein, the preparation method of the 30CrMnSiNi2A steel laser cladding powder includes the following steps：
Step 1：Dispensing：Each component weight percent content prepares in laser cladding powder described in accordance with the claim 1
Raw material 30CrMnSiNi2A bars and Fe/Ni/ rare earth alloy powders；
Step 2：Melting：The raw material of step steady is subjected to melting, obtains alloy molten solution；
Step 3：Atomization：The alloy solution that step 2 obtains further is atomized, atomizing medium is -15 DEG C -- 5 DEG C of argon
The pressure of gas atmosphere, atomization is 3-6MPa；After atomization, obtained after room temperature, drying in the inert atmosphere of room temperature.
Wherein, the atomizing medium described in step 3 is preferably -11 DEG C -- and 9 DEG C of argon gas atmosphere, atomizing pressure are preferably 4-
5MPa。
Wherein, the smelting temperature described in step 2 is 1400-1500 DEG C, and soaking time is 12-18 hours.
Wherein, inert atmosphere is preferably argon gas atmosphere.
In the preparation method of 30CrMnSiNi2A steel laser cladding powder proposed by the present invention, preferably in the mist of step 3
Hydrogen is passed through during changing simultaneously, the wherein volume ratio of argon gas and hydrogen is 20-30:1；So that further being dropped in atomization process
Impurity in eutectic whiting end.Wherein, the detailed process of step 3 is：The alloy solution that step 2 obtains further is atomized,
Atomizing medium is -15 DEG C -- the pressure of 5 DEG C of argon gas atmosphere, atomization is 3-6MPa；It is passed through hydrogen simultaneously during atomization,
The volume ratio of middle argon gas and hydrogen is 20-30:1；After atomization, room temperature inert atmosphere down toward room temperature, it is dry after to obtain the final product
It arrives.
Wherein, in the atomization steps described in step 3, the volume ratio of argon gas and hydrogen is preferably 25-30:1.Wherein, hydrogen
The gas of room temperature may be used.
A kind of 30CrMnSiNi2A steel laser cladding powder proposed by the present invention and preparation method have the beneficial effect that：
(1) laser cladding powder that the present invention obtains is in 30CrMnSiNi2A ultrafort steels so that main group of cladding layer
It point is consistent, makes it have good wetability, physics and chemistry compatibility and similar melts with the superpower steel matrix of 30CrMnSiNi2A
Point so that cladding interface has excellent bond strength, lower metallurgical imperfection and lower dilution rate.
(2) present invention regulates and controls the carbon equivalent in laser cladding powder, and regulates and controls out suitable carbon equivalent value, carries
The high toughness of cladding layer, reaches the matched well of intensity and toughness.
(3) content that Ni elements are suitably increased in laser cladding powder of the invention exists the content regulation and control of Ni elements
In appropriate range, be conducive to further increase the wetability of cladding powder and the toughness of cladding layer and crack arrest ability, inhibit molten
Coating cracks and delays crack growth rate；Contain trace rare-earth in laser cladding powder simultaneously, can crystal grain thinning, purification is molten
Body strengthens crystal boundary, improves the obdurability of cladding layer.
(4) size for the laser cladding powder that the present invention obtains includes micron order and nanometer grade powder, wherein further adjusting
The weight ratio of micron powder and nanometer grade powder has been controlled, while micron powder size and nanometer grade powder size have been carried out
Regulation and control so that the compactness for the cladding layer that laser cladding powder is used to be formed in laser melting and coating technique greatly improves, and improves molten
The quality of coating.
(5) in the preparation method of laser cladding powder proposed by the present invention, -15 DEG C are used in atomization steps for the first time -- 5
DEG C argon gas, further regulated and controled the size of cladding powder, regulated and controled micron powder and nanometer grade powder in cladding powder
Content；And the impurity content that a small amount of hydrogen further decreases cladding powder is passed through while atomization.
(6) impact flexibility for the cladding layer that laser cladding powder proposed by the present invention is formed is 428-475kJ/m2, tension
Intensity is 1570-1820MPa, elongation percentage 9%-13%.
Specific implementation mode
Technical scheme of the present invention is described in detail with reference to specific embodiment.
Embodiment 1
30CrMnSiNi2A steel laser cladding powders, wherein in the 30CrMnSiNi2A steel laser cladding powder
The amount of each component is by weight percentage：Cr 0.8%, Mn 0.75%, Si 0.65%, Ni 2.0%, C 0.16%, Cu
0.15%, P 0.015%, S 0.01%, La 0.001%, surplus are iron.
Specifically preparation method is：
Step 1：Dispensing：Prepare raw material according to each component weight percent content in above-mentioned laser cladding powder
30CrMnSiNi2A bars and Fe/Ni/La alloy powders.
Step 2：Melting：The raw material of step steady is placed in high vacuum protection electric furnace under the protection of argon gas and is carried out
Melting, smelting temperature are 1400 DEG C, and soaking time 12 hours obtains alloy molten solution；
Step 3：Atomization：The alloy solution that step 2 obtains further is atomized, the argon gas gas that atomizing medium is -15 DEG C
The pressure of atmosphere, atomization is 3MPa；Hydrogen is passed through during atomization simultaneously, the wherein volume ratio of argon gas and hydrogen is 25:1；Mist
After change, obtained after room temperature, drying in the inert atmosphere of room temperature.
Size in obtained laser cladding powder includes micron order and nanoscale, wherein micron-sized cladding powder and receiving
The weight ratio of the cladding powder of meter level is 10:1.
Embodiment 2
A kind of 30CrMnSiNi2A steel laser cladding powder, wherein the 30CrMnSiNi2A steel laser cladding powder
The amount of each component is by weight percentage in end：Cr 0.85%, Mn 0.85%, Si 0.80%, Ni 2.3%, C 0.18%,
Cu 0.15%, P 0.015%, S 0.01%, La 0.005%, surplus are iron.
Specifically preparation method is：
Step 1：Dispensing：Prepare raw material according to each component weight percent content in above-mentioned laser cladding powder
30CrMnSiNi2A bars and Fe/Ni/La alloy powders.
Step 2：Melting：The raw material of step steady is placed in high vacuum protection electric furnace under the protection of argon gas and is carried out
Melting, smelting temperature are 1400 DEG C, and soaking time is 15 hours, obtains alloy molten solution；
Step 3：Atomization：The alloy solution that step 2 obtains further is atomized, the argon gas gas that atomizing medium is -14 DEG C
The pressure of atmosphere, atomization is 3.5MPa；Hydrogen is passed through during atomization simultaneously, the wherein volume ratio of argon gas and hydrogen is 25:1；
After atomization, obtained after room temperature, drying in the inert atmosphere of room temperature.
Size in obtained laser cladding powder includes micron order and nanoscale, wherein micron-sized cladding powder and receiving
The weight ratio of the cladding powder of meter level is 12:1.
Embodiment 3
A kind of 30CrMnSiNi2A steel laser cladding powder, wherein the 30CrMnSiNi2A steel laser cladding powder
The amount of each component is by weight percentage in end：Cr 0.90%, Mn 0.90%, Si 0.85%, Ni 2.50%, C
0.18%, Cu 0.15%, P 0.015%, S 0.01%, La 0.005%, Ce 0.003%, surplus are iron.
Specifically preparation method is：
Step 1：Dispensing：Prepare raw material according to each component weight percent content in above-mentioned laser cladding powder
30CrMnSiNi2A bars and Fe/Ni/La/Ce alloy powders.
Step 2：Melting：The raw material of step steady is placed in high vacuum protection electric furnace under the protection of argon gas and is carried out
Melting, smelting temperature are 1400 DEG C, and soaking time is 15 hours, obtains alloy molten solution；
Step 3：Atomization：The alloy solution that step 2 obtains further is atomized, the argon gas gas that atomizing medium is -13 DEG C
The pressure of atmosphere, atomization is 3.5MPa；Hydrogen is passed through during atomization simultaneously, the wherein volume ratio of argon gas and hydrogen is 25:1；
After atomization, obtained after room temperature, drying in the inert atmosphere of room temperature.
Size in obtained laser cladding powder includes micron order and nanoscale, wherein micron-sized cladding powder and receiving
The weight ratio of the cladding powder of meter level is 13:1.
Embodiment 4
A kind of 30CrMnSiNi2A steel laser cladding powder, wherein the 30CrMnSiNi2A steel laser cladding powder
The amount of each component is by weight percentage in end：Cr 0.95%, Mn 1.0%, Si 0.90%, Ni 2.70%, C 0.19%,
Cu 0.17%, P 0.016%, S 0.013%, La 0.010%, surplus are iron.
Specifically preparation method is：
Step 1：Dispensing：Prepare raw material according to each component weight percent content in above-mentioned laser cladding powder
30CrMnSiNi2A bars and Fe/Ni/La alloy powders.
Step 2：Melting：The raw material of step steady is placed in high vacuum protection electric furnace under the protection of argon gas and is carried out
Melting, smelting temperature are 1500 DEG C, and soaking time is 12 hours, obtains alloy molten solution；
Step 3：Atomization：The alloy solution that step 2 obtains further is atomized, the argon gas gas that atomizing medium is -11 DEG C
The pressure of atmosphere, atomization is 3.5MPa；Hydrogen is passed through during atomization simultaneously, the wherein volume ratio of argon gas and hydrogen is 23:1；
After atomization, obtained after room temperature, drying in the inert atmosphere of room temperature.
Size in obtained laser cladding powder includes micron order and nanoscale, wherein micron-sized cladding powder and receiving
The weight ratio of the cladding powder of meter level is 14:1.
Embodiment 5
A kind of 30CrMnSiNi2A steel laser cladding powder, wherein the 30CrMnSiNi2A steel laser cladding powder
The amount of each component is by weight percentage in end：Cr 0.90%, Mn 1.0%, Si 0.85%, Ni 2.60%, C 0.19%,
Cu 0.15%, P 0.015%, S 0.012%, La 0.009%, surplus are iron.
Specifically preparation method is：
Step 1：Dispensing：Prepare raw material according to each component weight percent content in above-mentioned laser cladding powder
30CrMnSiNi2A bars and Fe/Ni/La/Ce alloy powders.
Step 2：Melting：The raw material of step steady is placed in high vacuum protection electric furnace under the protection of argon gas and is carried out
Melting, smelting temperature are 1450 DEG C, and soaking time is 15 hours, obtains alloy molten solution；
Step 3：The alloy solution that step 2 obtains further is atomized by atomization, the argon gas gas that atomizing medium is -10 DEG C
The pressure of atmosphere, atomization is 4.5MPa；Hydrogen is passed through during atomization simultaneously, the wherein volume ratio of argon gas and hydrogen is 23:1；
After atomization, obtained after room temperature, drying in the inert atmosphere of room temperature.
Size in obtained laser cladding powder includes micron order and nanoscale, wherein micron-sized cladding powder and receiving
The weight ratio of the cladding powder of meter level is 16:1.
Embodiment 6
A kind of 30CrMnSiNi2A steel laser cladding powder, wherein the 30CrMnSiNi2A steel laser cladding powder
The amount of each component is by weight percentage in end：Cr 0.95%, Mn 1.0%, Si 1.0%, Ni 3.0%, C 0.20%, Cu
0.18%, P 0.018%, S 0.013%, La 0.009%, 0.004% surpluses of Ce are iron.
Specifically preparation method is：
Step 1：Dispensing：Prepare raw material according to each component weight percent content in above-mentioned laser cladding powder
30CrMnSiNi2A bars and Fe/Ni/La alloy powders.
Step 2：Melting：The raw material of step steady is placed in high vacuum protection electric furnace under the protection of argon gas and is carried out
Melting, smelting temperature are 1400 DEG C, and soaking time is 15 hours, obtains alloy molten solution；
Step 3：Atomization：The alloy solution that step 2 obtains further is atomized, the argon gas gas that atomizing medium is -8 DEG C
The pressure of atmosphere, atomization is 4MPa；Hydrogen is passed through during atomization simultaneously, the wherein volume ratio of argon gas and hydrogen is 20:1；Mist
After change, obtained after room temperature, drying in the inert atmosphere of room temperature.
Size in obtained laser cladding powder includes micron order and nanoscale, wherein micron-sized cladding powder and receiving
The weight ratio of the cladding powder of meter level is 18:1.
Embodiment 7
A kind of 30CrMnSiNi2A steel laser cladding powder, wherein the 30CrMnSiNi2A steel laser cladding powder
The amount of each component is by weight percentage in end：Cr 1.0%, Mn 1.10%, Si 1.10%, Ni 3.2%, C 0.22%,
Cu 0.20%, P 0.020%, S 0.015%, La 0.015%, surplus are iron.
Specifically preparation method is：
Step 1：Dispensing：Prepare raw material according to each component weight percent content in above-mentioned laser cladding powder
30CrMnSiNi2A bars and Fe/Ni/La alloy powders.
Step 2：Melting：The raw material of step steady is placed in high vacuum protection electric furnace under the protection of argon gas and is carried out
Melting, smelting temperature are 1400 DEG C, and soaking time is 15 hours, obtains alloy molten solution；
Step 3：Atomization：The alloy solution that step 2 obtains further is atomized, the argon gas gas that atomizing medium is -5 DEG C
The pressure of atmosphere, atomization is 5MPa；Hydrogen is passed through during atomization simultaneously, the wherein volume ratio of argon gas and hydrogen is 20:1；Mist
After change, obtained after room temperature, drying in the inert atmosphere of room temperature.
Size in obtained laser cladding powder includes micron order and nanoscale, wherein micron-sized cladding powder and receiving
The weight ratio of the cladding powder of meter level is 20:1.
Performance test：
The cladding powder of cladding embodiment 1- embodiments 7 is distinguished on 30CrMnSiNi2A ultrafort steels using high power laser
End forms cladding layer on 30CrMnSiNi2A ultrafort steels.
Specially：Drying and processing is carried out to the cladding powder of embodiment 1- embodiments 7 respectively before cladding, it is right
30CrMnSiNi2A extra-strong steel belts cladding area is cleared up, it is ensured that substrate material surface is bright and is cleaned with acetone, to reduce table
Planar defect impacts laser technology.Powder is sent out by powder feeder, and laser molten pool, cladding are sent by coaxial powder-feeding nozzle
Cheng Zhong, using argon gas protective gas, good gas shield can reduce the formation of defects in cladding layer.Finally in matrix surface shape
At one layer of fine and close cladding layer.Laser melting coating parameter uses basis material laser melting coating Optimal Parameters of the same race.Design parameter is as follows
Shown in table.Using multi-track overlapping melting and coating technique, overlapping rate is 40~50%, and single track cladding layer height is not more than 0.5mm.Its
In, laser melting coating parameter is：Laser power 1200W, sweep speed 0.01m/s, powder feeding rate keep off for Low, shielding gas velocity
400L/h。
One layer of cladding layer is prepared on 30CrMnSiNi2A ultrafort steels using the laser melting coating parameter of optimization.Macroscopically cladding
Layer surface no significant defect.Cladding layer is formed uniformly, and bright in color is consistent.To cladding layer capability test result referring to following table：
All explanations being not directed to belong to techniques known in the specific implementation mode of the present invention, can be public for reference
Know that technology is implemented.
Above-mentioned specific implementation mode is to 30CrMnSiNi2A steel laser cladding powder proposed by the present invention and preparation side
The specific support of law technology thought cannot limit protection scope of the present invention with this, everything thinks according to technology proposed by the present invention
Think, any same variation made on the basis of the technical program or equivalent change, belongs to technical solution of the present invention guarantor
Protect range.
Claims (9)
1.30CrMnSiNi2A steel laser cladding powders, which is characterized in that the 30CrMnSiNi2A steel laser cladding powder
The amount of each component is by weight percentage in end：Cr 0.8%-1.0%, Mn 0.75%-1.10%, Si 0.65%-
1.10%, Ni 2.0%-3.2%, C 0.16%-0.22%, Cu 0.15%-0.20%, P 0.015%-0.020%, S
0.01%-0.015%, rare earth 0.001%-0.015%, surplus are iron；The 30CrMnSiNi2A steel laser cladding powder
Size include micron order and nanoscale, wherein the weight ratio of micron order and nano level laser cladding powder is 10-20:1.
2. 30CrMnSiNi2A steel laser cladding powder according to claim 1, which is characterized in that described
The amount of each component is by weight percentage in 30CrMnSiNi2A steel laser cladding powders：Cr 0.85%-0.95%, Mn
0.85%-1.0%, Si 0.80%-1.0%, Ni 2.3%-3.0%, C 0.18%-0.20%, Cu 0.15%-0.18%,
P 0.015%-0.018%, S 0.01%-0.013%, rare earth 0.005%-0.013%, surplus is iron.
3. 30CrMnSiNi2A steel laser cladding powder according to claim 1, which is characterized in that described
The amount of each component is by weight percentage in 30CrMnSiNi2A steel laser cladding powders：Cr 0.9%, Mn 1.0%, Si
0.85%, Ni 2.6%, C 0.19%, Cu 0.15%, P 0.015%, S 0.012%, rare earth 0.009%, surplus are iron.
4. according to any 30CrMnSiNi2A steel laser cladding powders of claim 1-3, which is characterized in that described dilute
Soil is at least one of La, Ce, Y.
5. 30CrMnSiNi2A steel laser cladding powder according to claim 1, which is characterized in that described micron-sized
The grain size of laser cladding powder is 40-200 μm；The grain size of the nano level laser cladding powder is 80-350nm.
The preparation method of 6.30CrMnSiNi2A steel laser cladding powders, which is characterized in that include the following steps：
Step 1：Dispensing：Each component weight percent content prepares raw material in laser cladding powder described in accordance with the claim 1
30CrMnSiNi2A bars and Fe/Ni/ rare earth alloy powders；
Step 2：Melting：The raw material of step steady is subjected to melting, obtains alloy molten solution；
Step 3：Atomization：The alloy molten solution that step 2 obtains further is atomized, atomizing medium is -15 DEG C -- 5 DEG C of argon gas
The pressure of atmosphere, atomization is 3-6MPa；After atomization, obtained after room temperature, drying in the inert atmosphere of room temperature.
7. the preparation method of 30CrMnSiNi2A steel laser cladding powder according to claim 6, which is characterized in that step
Atomizing medium described in rapid three is -11 DEG C -- 9 DEG C of argon gas atmosphere, atomizing pressure 4-5MPa.
8. the preparation method of 30CrMnSiNi2A steel laser cladding powder according to claim 6, which is characterized in that step
Hydrogen is passed through in atomization process described in rapid three simultaneously, the wherein volume ratio of argon gas and hydrogen is 20-30:1.
9. the preparation method of 30CrMnSiNi2A steel laser cladding powder according to claim 6, which is characterized in that step
Smelting temperature described in rapid two is 1400-1500 DEG C, and soaking time is 12-18 hours.
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| CN111593343B (en) * | 2020-06-10 | 2022-03-15 | 中国航发北京航空材料研究院 | Process method for repairing flap slide rail chromium plating surface chipping defect by laser cladding |
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| CN115386871A (en) * | 2022-08-29 | 2022-11-25 | 黄河水利委员会黄河水利科学研究院 | High-impact-cavitation-corrosion-resistant coating |
| CN116179945B (en) * | 2023-01-29 | 2023-10-27 | 济南大学 | Laser cladding powder for high temperature 45# steel |
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