CN110042387A - A kind of 40Cr steel surface build-up wear-resistant layer and preparation method thereof - Google Patents
A kind of 40Cr steel surface build-up wear-resistant layer and preparation method thereof Download PDFInfo
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- CN110042387A CN110042387A CN201910257451.6A CN201910257451A CN110042387A CN 110042387 A CN110042387 A CN 110042387A CN 201910257451 A CN201910257451 A CN 201910257451A CN 110042387 A CN110042387 A CN 110042387A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
- C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
- C22C19/058—Alloys based on nickel or cobalt based on nickel with chromium without Mo and W
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/07—Alloys based on nickel or cobalt based on cobalt
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
- C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
- B22F2009/043—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling by ball milling
Abstract
The invention discloses a kind of 40Cr steel surface build-up wear-resistant layer, the wearing layer including being covered on 40Cr steel surface, the wearing layer is Fe base coating, Ni base coating or Co base coating.The coating can improve the hardness of 40Cr steel surface, and further increase its wear-resisting, corrosion resisting property.The invention also discloses the preparation methods of above-mentioned wearing layer, specifically, step 1: weighing raw material powder needed for preparing wearing layer；Step 2: preparing wearing layer powder, that is, prepare Fe base coating powder, preparation Ni base coating powder or preparation Co base coating powder；Step 3: in 40Cr steel surface build-up wear-resistant layer powder, the wearing layer powder is Fe base coating powder, Ni base coating powder or Co base coating powder.
Description
Technical field
The invention belongs to steel surface wearing layer technical fields, and in particular to a kind of 40Cr steel surface build-up wear-resistant layer, this
Invention further relates to the preparation method of the wearing layer.
Background technique
With the development of China's science and technology, there has also been the progress advanced by leaps and bounds for manufacturing, and 40Cr steel is as China's machine
One of most common material in tool manufacturing.40Cr steel belongs to middle carbon and low-alloy high-strength hardened and tempered steel, tensile strength, surrender
The performances such as intensity and harden ability are superior to 45 steel, have excellent comprehensive mechanical property after modifier treatment, good
Low-temperature impact toughness and low notch sensitivity, due to its excellent comprehensive performance, 40Cr steel be often used as production automobile axle shaft,
The components such as gear, axis, worm screw.
The failure of component often shows the performance for improving material surface on the surface thereof earliest and plays one for resisting failure
It is set for using, and the service life of member for prolonging to a certain extent, reduces cost.Some domestic and international researchers pass through various tables
Face modification technology is come the quality for preparing and studying coating it is expected raising material surface, and the most common are Fe bases in coating selection
With Ni base, to improve the performance of coating and keep the ingredient between coating and matrix close by metalloid elements such as addition Si, B, from
And it is well combined, flawless coating.
40Cr steel working environment as locating for it generally carries biggish load, abrasion and corrosion and component is caused to generate
Crackle even fracture failure.40Cr steel surface is carried out repairing built-up welding and prolonged its service life to ask as what is more paid close attention at present
Topic.
Summary of the invention
The object of the present invention is to provide a kind of 40Cr steel surface build-up wear-resistant layer, which can improve 40Cr steel surface
Hardness, and further increase its wear-resisting, corrosion resisting property.
It is a further object to provide a kind of preparation methods of 40Cr steel surface build-up wear-resistant layer.
The technical scheme adopted by the invention is that a kind of 40Cr steel surface build-up wear-resistant layer, including it is covered on 40Cr steel table
The wearing layer in face, wearing layer are Fe base coating, Ni base coating or Co base coating；
Fe base coating is made of following raw material components by mass percentage: carbon dust 0.1%-0.2%, chromium powder 15.5%-
17%, silicon powder 1%-1.5%, molybdenum powder 0.1%-0.2%, nickel powder 1.5%-2.0%, iron powder 79%-81%, the above constituent mass
The sum of percentage is 100%；
Ni base coating is made of following raw material components by mass percentage: carbon dust 0.2%-0.5%, chromium powder 5%-7%, silicon
Powder 0.1%-1%, boron powder 0.1%-1%, nickel powder 91%-93%, iron powder 0.4%-0.6%, the above constituent mass percentage it
Be 100%；
Co base coating is made of following raw material components by mass percentage: carbon dust 0.6%-0.8%, chromium powder 25%-27%,
Silicon powder 1%-2%, tungsten powder 5%-7%, cobalt powder 64%-66%, boron powder 0.4%-0.7%, the sum of above constituent mass percentage
It is 100%.
The features of the present invention also characterized in that:
The carbon dust granularity formed in the raw material powder of Fe base coating is 100 mesh, remaining raw material Powder Particle Size is 60 mesh；
The carbon dust granularity formed in the raw material powder of Ni base coating is 100 mesh, remaining raw material Powder Particle Size is 60 mesh；
The carbon dust granularity formed in the raw material powder of Co base coating is 100 mesh, remaining raw material Powder Particle Size is 60 mesh.
Another technical solution of the present invention is a kind of above-mentioned preparation side of 40Cr steel surface build-up wear-resistant layer
Method, the specific steps are as follows:
Step 1: weighing raw material powder needed for preparing wearing layer；
Raw material powder needed for preparing Fe base coating: carbon dust 0.1%-0.2%, chromium powder is weighed by following mass percent
15.5%-17%, silicon powder 1%-1.5%, molybdenum powder 0.1%-0.2%, nickel powder 1.5%-2.0%, iron powder 79%-81% are above
The sum of constituent mass percentage is 100%；
Or weighed by following mass percent prepare Ni base coating needed for raw material powder: carbon dust 0.2%-0.5%, chromium powder
5%-7%, silicon powder 0.1%-1%, boron powder 0.1%-1%, nickel powder 91%-93%, iron powder 0.4%-0.6%, above group of sub-prime
Measuring the sum of percentage is 100%；
Or weighed by following mass percent prepare Co base coating needed for raw material powder: carbon dust 0.6%-0.8%, chromium powder
25%-27%, silicon powder 1%-2%, tungsten powder 5%-7%, cobalt powder 64%-66%, boron powder 0.4%-0.7%, the above constituent mass
The sum of percentage is 100%；
Step 2: preparing wearing layer powder, that is, prepare Fe base coating powder, preparation Ni base coating powder or preparation Co base and apply
Layer powder；
Step 3: in 40Cr steel surface build-up wear-resistant layer powder, the wearing layer powder is Fe base coating powder, the painting of Ni base
Layer powder or Co base coating powder.
The features of the present invention also characterized in that
The specific preparation process of step 2 are as follows:
When preparing Fe base coating powder, other the every kind raw material powder in addition to carbon dust is subjected to ball-milling treatment respectively, it will
Each raw material powder and carbon dust carry out mixing to obtain Fe base coating powder after ball-milling treatment；
When preparing Ni base coating powder, other the every kind raw material powder in addition to carbon dust is subjected to ball-milling treatment respectively, it will
Each raw material powder and carbon dust carry out mixing to obtain Ni base coating powder after ball-milling treatment；
When preparing Co base coating powder, other the every kind raw material powder in addition to carbon dust is subjected to ball-milling treatment respectively, it will
Each raw material powder and carbon dust carry out mixing to obtain Co base coating powder after ball-milling treatment.
For its in addition to carbon dust when preparing Fe base coating powder, prepare Ni base coating powder or preparing Co base coating powder
His the ball-milling treatment process of every kind of raw material powder is all the same, it may be assumed that after every kind of raw material powder is soaked with dehydrated alcohol with ball milling pearl
It pours into together and carries out ball milling in ball grinder, applying argon gas vacuumizes repeatedly to ball mill, repeats 3~5 times, and program parameter, ball is arranged
It stands after mill and takes out after a week, wherein every kind of raw material powder is 1:20 with corresponding ball milling pearl mass ratio.
The diameter of ball milling pearl includes tri- kinds of specifications of 6mm, 8mm, 10mm, the ball milling pearl of three kinds of different-diameters in mechanical milling process
Ratio of number is 1:1:1.
The design parameter of program is set during ball-milling treatment in step 2 are as follows: revolving speed 400r/min, ball milling 20h, positive and negative rotation
10min/ times.
The specific preparation process of step 3 are as follows: cleaned up 40Cr steel surface with acetone, the Fe base that will be prepared in step 2
Coated powder, Ni base coating powder or Co base coating powder are put into oven and are dried, and utilize synchronous laser cladding pair
40Cr steel surface carries out built-up welding Fe base coating powder, Ni base coating powder or Co base coating powder.
In step 3, drying time 1h, drying temperature is 80 DEG C.
In step 3, the specific works condition of synchronous laser cladding are as follows: output power 3kw, spot diameter 5mm, scanning speed
Degree is 300mm/min, 70 ° of powder feeding angle, powder feed rate 90g/min, and using Ar gas as protective gas, coat is with a thickness of 4mm.
The beneficial effects of the present invention are:
(1) three kinds of 40Cr steel surface built-up welding metal powders of Fe, Ni, Co base involved in the present invention and 40Cr steel junction are welded
Beautiful appearance is stitched, metallurgical bonding is good, joint flawless；
(2) 40Cr steel surface built-up welding Fe, Ni, Co based powders of the present invention are obviously improved its surface hardness, antioxygen
Change function admirable, there is excellent wear-resisting and corrosion resistance, surface reconditioning can be carried out to impaired workpiece and increase it to use the longevity
Life；
(3) 40Cr steel surface built-up welding Fe, Ni, Co based powders of the present invention, the accuracy of manufacture is higher, and high production efficiency can be used for
Automated production.
Detailed description of the invention
Fig. 1 is Fe base coating metallographic structure figure obtained by embodiment 1 in the present invention；
Fig. 2 is Fe base coating metallographic structure figure obtained by embodiment 2 in the present invention；
Fig. 3 is Fe base coating metallographic structure figure obtained by embodiment 3 in the present invention；
Fig. 4 is Ni base coating metallographic structure figure obtained by embodiment 4 in the present invention；
Fig. 5 is Ni base coating metallographic structure figure obtained by embodiment 5 in the present invention；
Fig. 6 is Ni base coating metallographic structure figure obtained by embodiment 6 in the present invention；
Fig. 7 is Co base coating metallographic structure figure obtained by embodiment 7 in the present invention；
Fig. 8 is Co base coating metallographic structure figure obtained by embodiment 8 in the present invention；
Fig. 9 is Co base coating metallographic structure figure obtained by embodiment 9 in the present invention.
Specific embodiment
With reference to the accompanying drawing and specific embodiment the present invention is described in detail.
A kind of 40Cr steel surface build-up wear-resistant layer of the invention, the wearing layer including being covered on 40Cr steel surface, wearing layer
For Fe base coating, Ni base coating or Co base coating；
Fe base coating is made of following raw material components by mass percentage: carbon dust 0.1%-0.2%, chromium powder 15.5%-
17%, silicon powder 1%-1.5%, molybdenum powder 0.1%-0.2%, nickel powder 1.5%-2.0%, iron powder 79%-81%, the above constituent mass
The sum of percentage is 100%；
Ni base coating is made of following raw material components by mass percentage: carbon dust 0.2%-0.5%, chromium powder 5%-7%, silicon
Powder 0.1%-1%, boron powder 0.1%-1%, nickel powder 91%-93%, iron powder 0.4%-0.6%, the above constituent mass percentage it
Be 100%；
Co base coating is made of following raw material components by mass percentage: carbon dust 0.6%-0.8%, chromium powder 25%-27%,
Silicon powder 1%-2%, tungsten powder 5%-7%, cobalt powder 64%-66%, boron powder 0.4%-0.7%, the sum of above constituent mass percentage
It is 100%.
The carbon dust granularity formed in the raw material powder of Fe base coating is 100 mesh, remaining raw material Powder Particle Size is 60 mesh；
The carbon dust granularity formed in the raw material powder of Ni base coating is 100 mesh, remaining raw material Powder Particle Size is 60 mesh；
The carbon dust granularity formed in the raw material powder of Co base coating is 100 mesh, remaining raw material Powder Particle Size is 60 mesh.
A kind of preparation method of above-mentioned 40Cr steel surface build-up wear-resistant layer, the specific steps are as follows:
Step 1: weighing raw material powder needed for preparing wearing layer；
Raw material powder needed for preparing Fe base coating: carbon dust 0.1%-0.2%, chromium powder is weighed by following mass percent
15.5%-17%, silicon powder 1%-1.5%, molybdenum powder 0.1%-0.2%, nickel powder 1.5%-2.0%, iron powder 79%-81% are above
The sum of constituent mass percentage is 100%；
Or weighed by following mass percent prepare Ni base coating needed for raw material powder: carbon dust 0.2%-0.5%, chromium powder
5%-7%, silicon powder 0.1%-1%, boron powder 0.1%-1%, nickel powder 91%-93%, iron powder 0.4%-0.6%, above group of sub-prime
Measuring the sum of percentage is 100%；
Or weighed by following mass percent prepare Co base coating needed for raw material powder: carbon dust 0.6%-0.8%, chromium powder
25%-27%, silicon powder 1%-2%, tungsten powder 5%-7%, cobalt powder 64%-66%, boron powder 0.4%-0.7%, the above constituent mass
The sum of percentage is 100%；
Step 2: preparing wearing layer powder, that is, prepare Fe base coating powder, preparation Ni base coating powder or preparation Co base and apply
Layer powder；
The specific preparation process of step 2 are as follows:
When preparing Fe base coating powder, due to carbon dust be easy in mechanical milling process it is on fire, by addition to carbon dust other are every
Kind raw material powder carries out ball-milling treatment respectively, and raw material powder each after ball-milling treatment and carbon dust are carried out to mix to obtain Fe base coating powder
End；
When preparing Ni base coating powder, due to carbon dust be easy in mechanical milling process it is on fire, by addition to carbon dust other are every
Kind raw material powder carries out ball-milling treatment respectively, and raw material powder each after ball-milling treatment and carbon dust are carried out to mix to obtain Ni base coating powder
End；
When preparing Co base coating powder, due to carbon dust be easy in mechanical milling process it is on fire, by addition to carbon dust other are every
Kind raw material powder carries out ball-milling treatment respectively, and raw material powder each after ball-milling treatment and carbon dust are carried out to mix to obtain Co base coating powder
End.
For its in addition to carbon dust when preparing Fe base coating powder, prepare Ni base coating powder or preparing Co base coating powder
His the ball-milling treatment process of every kind of raw material powder is all the same, it may be assumed that after every kind of raw material powder is soaked with dehydrated alcohol with ball milling pearl
It pours into together and carries out ball milling in ball grinder, applying argon gas vacuumizes repeatedly to ball mill, repeats 3~5 times, and program parameter, ball is arranged
It stands after mill and takes out after a week, wherein every kind of raw material powder is 1:20 with corresponding ball milling pearl mass ratio.
The diameter of ball milling pearl includes tri- kinds of specifications of 6mm, 8mm, 10mm, the ball milling pearl of three kinds of different-diameters in mechanical milling process
Ratio of number is 1:1:1.
The design parameter of program is set during ball-milling treatment in step 2 are as follows: revolving speed 400r/min, ball milling 20h, positive and negative rotation
10min/ times.
Step 3: in 40Cr steel surface build-up wear-resistant layer powder, the wearing layer powder is Fe base coating powder, the painting of Ni base
Layer powder or Co base coating powder, so that the overlay cladding of three kinds of powder be made.
The specific preparation process of step 3 are as follows: cleaned up 40Cr steel surface with acetone, the Fe base that will be prepared in step 2
Coated powder, Ni base coating powder or Co base coating powder are put into oven and are dried, and utilize synchronous laser cladding pair
40Cr steel surface carries out built-up welding Fe base coating powder, Ni base coating powder or Co base coating powder；
In step 3, drying time 1h, drying temperature is 80 DEG C.
In step 3, the specific works condition of synchronous laser cladding are as follows: output power 3kw, spot diameter 5mm, scanning speed
Degree is 300mm/min, 70 ° of powder feeding angle, powder feed rate 90g/min, and using Ar gas as protective gas, coat is with a thickness of 4mm.
Effect and function for each component in 40Cr steel surface built-up welding Fe, Ni, Co base wearing layer is as follows:
Main function of the carbon dust (C) in wearing layer: carbon can influence intensity, hardness, toughness of steel etc., if its
Too high levels then will form high carbon martensite (hardness height, poor toughness) during heat treatment, can make if its content is too low
Material hardness and wearability are all bad, therefore the suitable content for selecting carbon helps to improve the physical property of material.
Main function of the chromium powder (Cr) in wearing layer: its harden ability can be improved in it in the material, and thinning microstructure improves
Wear-resisting, the anti-corrosion and antioxygenic property of material.
Main function of the silicon powder (Si) in wearing layer: exist in the material with solid solution thereof in ferrite and austenite
In the middle, the intensity of solid solution can be improved.
Main function of the molybdenum powder (Mo) in wearing layer: the harden ability of material can be improved in the element, improves material hardness.
Main function of the nickel powder (Ni) in wearing layer: the element forms stable Ovshinsky element of volume, changes the tough of material
The cryogenic properties such as property.
Main function of the boron powder (B) in Ni base wearing layer: the intensity of material can be improved in the element, improves the densification of material
Property and hot rolling performance.
Main function of the tungsten powder (W) in Co base wearing layer: the element can form hardness and wear-resisting with the C (carbon) in material
The preferable WC (tungsten carbide) of property.
Main function of the cobalt powder (Co) in Co base wearing layer: as the matrix powder of wearing layer, it can promote material
Hardness, the mechanical properties such as intensity.
Main function of the iron powder (Fe) in wearing layer: as the matrix powder of wearing layer, alloying element is to material structure
Performance influences to both depend on the interaction of they and Fe or C in material.
Embodiment 1
A kind of preparation method of 40Cr steel surface build-up wear-resistant layer, the specific steps are as follows:
Step 1: raw material powder needed for preparing Fe base coating is weighed by following mass percent: (wherein carbon dust granularity is
100 mesh, remaining is 60 mesh), carbon dust 0.1%, chromium powder 16.5%, silicon powder 1.5%, molybdenum powder 0.1%, nickel powder 1.5%, iron powder
80.3%, the sum of above constituent mass percentage is 100%；
Step 2: according to corresponding ball needed for the Mass Calculation of weighed other raw material powders in addition to carbon dust of step 1
Grind the quality of pearl, the mass ratio of every kind of raw material powder and ball milling pearl is 1:20, wherein the diameter of ball milling pearl include 6mm, 8mm,
Tri- kinds of specifications of 10mm, the pearl quantity ratio of three kinds of different-diameters is 1:1:1 in mechanical milling process, and every kind of raw material powder is placed on weighing
It is poured into together with ball milling pearl after being soaked on paper with dehydrated alcohol and carries out ball-milling treatment in ball grinder, the specific process is as follows: to ball
Applying argon gas vacuumizes grinding machine repeatedly, repeats 3~5 times, ball mill parameter is arranged are as follows: revolving speed 400r/min, ball milling 20h, positive and negative rotation
10min/ times；One week is stood after ball milling and is taken out, and raw material powder each after ball-milling treatment and carbon dust are carried out to mix to obtain the painting of Fe base
Layer powder；
Step 3: by diameter be 50mm, the 40Cr steel bar of a length of 40mm is put into the container equipped with acetone and carries out ultrasonic wave
10min is cleaned in cleaning；The Fe base coating powder prepared in step 2 is put into oven and is dried, drying box parameter is set
Are as follows: drying time 1h, drying temperature are 80 DEG C；Built-up welding Fe base is carried out to 40Cr steel bar surface using synchronous laser cladding
Coated powder, specific works condition are are as follows: output power 3kw, spot diameter 5mm, scanning speed 300mm/min, powder feeding angle
70 °, powder feed rate 90g/min, using Ar gas as protective gas, coat is with a thickness of 4mm, so that Fe base coating be made.
As shown in Figure 1, crystal grain is tiny, dendritic growth orientation is obvious for the Fe base coating metallographic structure obtained by embodiment 1.
After tested, the microhardness average value of coating are as follows: 430.77HV0.5, the microhardness average value of 40Cr steel are as follows: 230HV0.5；It applies
The open circuit potential of layer are as follows: the open circuit potential of -0.172V, 40Cr steel are as follows: -0.45V；Coating is averaged under 1000g load-up condition
Friction factor are as follows: 0.65, the average friction factor of 40Cr steel under 1000g load-up condition are as follows: 0.4；It is the hardness of Fe base coating, resistance to
Corrosion and wear-resisting property are superior to 40Cr steel, and performance meets the requirements.
Embodiment 2
A kind of preparation method of 40Cr steel surface build-up wear-resistant layer, the specific steps are as follows:
Step 1: weighing Fe based powders (wherein carbon dust granularity is 100 mesh, remaining is 60 mesh), carbon dust by mass percentage
0.2%, chromium powder 17%, silicon powder 1%, molybdenum powder 0.2%, nickel powder 1.6%, iron powder 79%, the sum of above constituent mass percentage is
100%；
Step 2: according to corresponding ball needed for the Mass Calculation of weighed other raw material powders in addition to carbon dust of step 1
Grind the quality of pearl, the mass ratio of every kind of raw material powder and ball milling pearl is 1:20, wherein the diameter of ball milling pearl include 6mm, 8mm,
Tri- kinds of specifications of 10mm, the pearl quantity ratio of three kinds of different-diameters is 1:1:1 in mechanical milling process, and every kind of raw material powder is placed on weighing
It is poured into together with ball milling pearl after being soaked on paper with dehydrated alcohol and carries out ball-milling treatment in ball grinder, the specific process is as follows: to ball
Applying argon gas vacuumizes grinding machine repeatedly, repeats 3~5 times, ball mill parameter is arranged are as follows: revolving speed 400r/min, ball milling 20h, positive and negative rotation
10min/ times；One week is stood after ball milling and is taken out, and raw material powder each after ball-milling treatment and carbon dust are carried out to mix to obtain the painting of Fe base
Layer powder；
Step 3: by diameter be 50mm, the 40Cr steel bar of a length of 40mm is put into the container equipped with acetone and carries out ultrasonic wave
10min is cleaned in cleaning；The Fe base coating powder prepared in step 2 is put into oven and is dried, drying box parameter is set
Are as follows: drying time 1h, drying temperature are 80 DEG C；Built-up welding Fe base is carried out to 40Cr steel bar surface using synchronous laser cladding
Coated powder, specific works condition are are as follows: output power 3kw, spot diameter 5mm, scanning speed 300mm/min, powder feeding angle
70 °, powder feed rate 90g/min, using Ar gas as protective gas, coat is with a thickness of 4mm, so that Fe base coating be made.
The Fe base coating metallographic structure obtained by embodiment 2 is as shown in Fig. 2, crystallite size is more tiny compared with Fig. 1, dendrite
The orientation of growth is obvious.After tested, the microhardness average value of coating are as follows: 435.77HV0.5, the microhardness average value of 40Cr steel
Are as follows: 230HV0.5；The open circuit potential of coating are as follows: the open circuit potential of -0.170V, 40Cr steel are as follows: -0.45V；In 1000g load-up condition
The average friction factor of lower coating are as follows: 0.67, the average friction factor of 40Cr steel under 1000g load-up condition are as follows: 0.4；Fe base
Hardness, corrosion resistance and the wear-resisting property of coating are superior to 40Cr steel, and performance meets the requirements.
Embodiment 3
A kind of preparation method of 40Cr steel surface build-up wear-resistant layer, the specific steps are as follows:
Step 1: weighing Fe based powders (wherein carbon dust granularity is 100 mesh, remaining is 60 mesh), carbon dust by mass percentage
0.15%, chromium powder 15.5%, silicon powder 1.2%, molybdenum powder 0.15%, nickel powder 2%, iron powder 81%, the above constituent mass percentage it
Be 100%；
Step 2: according to corresponding ball needed for the Mass Calculation of weighed other raw material powders in addition to carbon dust of step 1
Grind the quality of pearl, the mass ratio of every kind of raw material powder and ball milling pearl is 1:20, wherein the diameter of ball milling pearl include 6mm, 8mm,
Tri- kinds of specifications of 10mm, the pearl quantity ratio of three kinds of different-diameters is 1:1:1 in mechanical milling process, and every kind of raw material powder is placed on weighing
It is poured into together with ball milling pearl after being soaked on paper with dehydrated alcohol and carries out ball-milling treatment in ball grinder, the specific process is as follows: to ball
Applying argon gas vacuumizes grinding machine repeatedly, repeats 3~5 times, ball mill parameter is arranged are as follows: revolving speed 400r/min, ball milling 20h, positive and negative rotation
10min/ times；One week is stood after ball milling and is taken out, and raw material powder each after ball-milling treatment and carbon dust are carried out to mix to obtain the painting of Fe base
Layer powder；
Step 3: by diameter be 50mm, the 40Cr steel bar of a length of 40mm is put into the container equipped with acetone and carries out ultrasonic wave
10min is cleaned in cleaning；The Fe base coating powder prepared in step 2 is put into oven and is dried, drying box parameter is set
Are as follows: drying time 1h, drying temperature are 80 DEG C；Built-up welding Fe base is carried out to 40Cr steel bar surface using synchronous laser cladding
Coated powder, specific works condition are are as follows: output power 3kw, spot diameter 5mm, scanning speed 300mm/min, powder feeding angle
70 °, powder feed rate 90g/min, using Ar gas as protective gas, coat is with a thickness of 4mm, so that Fe base coating be made.
The Fe base coating metallographic structure obtained by embodiment 3 is as shown in figure 3, crystal grain is tiny, compared with Fig. 1 and Fig. 2 column crystal
Quantity is reduced, and dendritic growth orientation is more obvious.After tested, the microhardness average value of coating are as follows: 432.57HV0.5, 40Cr steel
Microhardness average value are as follows: 230HV0.5；Coating open circuit potential are as follows: the open circuit potential of -0.168V, 40Cr steel are as follows: -0.45V；
The average friction factor of coating under 1000g load-up condition are as follows: 0.63, the average friction of 40Cr steel under 1000g load-up condition
Factor are as follows: 0.4；Hardness, corrosion resistance and the wear-resisting property of Fe base coating are superior to 40Cr steel, and performance meets the requirements.
Embodiment 4
A kind of preparation method of 40Cr steel surface build-up wear-resistant layer, the specific steps are as follows:
Step 1: weighing Ni based powders (wherein carbon dust granularity is 100 mesh, remaining is 60 mesh), carbon dust by mass percentage
0.5%, chromium powder 5%, silicon powder 0.1%, boron powder 1%, nickel powder 93%, iron powder 0.4%, the sum of above constituent mass percentage is
100%；
Step 2: according to corresponding ball needed for the Mass Calculation of weighed other raw material powders in addition to carbon dust of step 1
Grind the quality of pearl, the mass ratio of every kind of raw material powder and ball milling pearl is 1:20, wherein the diameter of ball milling pearl include 6mm, 8mm,
Tri- kinds of specifications of 10mm, the pearl quantity ratio of three kinds of different-diameters is 1:1:1 in mechanical milling process, and every kind of raw material powder is placed on weighing
It is poured into together with ball milling pearl after being soaked on paper with dehydrated alcohol and carries out ball-milling treatment in ball grinder, the specific process is as follows: to ball
Applying argon gas vacuumizes grinding machine repeatedly, repeats 3~5 times, ball mill parameter is arranged are as follows: revolving speed 400r/min, ball milling 20h, positive and negative rotation
10min/ times；One week is stood after ball milling and is taken out, and raw material powder each after ball-milling treatment and carbon dust are carried out to mix to obtain the painting of Ni base
Layer powder；
Step 3: by diameter be 50mm, the 40Cr steel bar of a length of 40mm is put into the container equipped with acetone and carries out ultrasonic wave
10min is cleaned in cleaning；The Ni base coating powder prepared in step 2 is put into oven and is dried, drying box parameter is set
Are as follows: drying time 1h, drying temperature are 80 DEG C；Built-up welding Ni base is carried out to 40Cr steel bar surface using synchronous laser cladding
Coated powder, specific works condition are are as follows: output power 3kw, spot diameter 5mm, scanning speed 300mm/min, powder feeding angle
70 °, powder feed rate 90g/min, using Ar gas as protective gas, coat is with a thickness of 4mm, so that Ni base coating be made.
The Ni base coating metallographic structure obtained by embodiment 4 is as shown in figure 4, crystal grain is coarse compared with Fe base.After tested, it applies
The microhardness average value of layer are as follows: 363.27HV0.5, the microhardness average value of 40Cr steel are as follows: 230HV0.5；The open circuit electricity of coating
Position are as follows: the open circuit potential of -0.247V, 40Cr steel are as follows: -0.45V；The average friction factor of coating under 1000g load-up condition are as follows:
0.55, the average friction factor of 40Cr steel under 1000g load-up condition are as follows: 0.4；The hardness of Ni base coating, corrosion resistance and resistance to
Mill performance is superior to 40Cr steel, and performance meets the requirements.
Embodiment 5
A kind of 40Cr steel surface build-up wear-resistant layer and preparation method thereof, the specific steps are as follows:
Step 1: weighing Ni based powders (wherein carbon dust granularity is 100 mesh, remaining is 60 mesh), carbon dust by mass percentage
0.2%, chromium powder 6.1%, silicon powder 1%, boron powder 0.1%, nickel powder 92%, iron powder 0.6%, the sum of above constituent mass percentage is
100%；
Step 2: according to corresponding ball needed for the Mass Calculation of weighed other raw material powders in addition to carbon dust of step 1
Grind the quality of pearl, the mass ratio of every kind of raw material powder and ball milling pearl is 1:20, wherein the diameter of ball milling pearl include 6mm, 8mm,
Tri- kinds of specifications of 10mm, the pearl quantity ratio of three kinds of different-diameters is 1:1:1 in mechanical milling process, and every kind of raw material powder is placed on weighing
It is poured into together with ball milling pearl after being soaked on paper with dehydrated alcohol and carries out ball-milling treatment in ball grinder, the specific process is as follows: to ball
Applying argon gas vacuumizes grinding machine repeatedly, repeats 3~5 times, ball mill parameter is arranged are as follows: revolving speed 400r/min, ball milling 20h, positive and negative rotation
10min/ times；One week is stood after ball milling and is taken out, and raw material powder each after ball-milling treatment and carbon dust are carried out to mix to obtain the painting of Ni base
Layer powder；
Step 3: by diameter be 50mm, the 40Cr steel bar of a length of 40mm is put into the container equipped with acetone and carries out ultrasonic wave
10min is cleaned in cleaning；The Ni base coating powder prepared in step 2 is put into oven and is dried, drying box parameter is set
Are as follows: drying time 1h, drying temperature are 80 DEG C；Built-up welding Ni base is carried out to 40Cr steel bar surface using synchronous laser cladding
Coated powder, specific works condition are are as follows: output power 3kw, spot diameter 5mm, scanning speed 300mm/min, powder feeding angle
70 °, powder feed rate 90g/min, using Ar gas as protective gas, coat is with a thickness of 4mm, so that Ni base coating be made.
The Ni base coating metallographic structure obtained by embodiment 5 is as shown in figure 5, crystal grain is big compared with Fe base, and dendrite is without obvious
The orientation of growth.After tested, the microhardness average value of coating are as follows: 365.82HV0.5, the microhardness average value of 40Cr steel are as follows:
230HV0.5；The open circuit potential of coating are as follows: the open circuit potential of -0.254V, 40Cr steel are as follows: -0.45V；Under 1000g load-up condition
The average friction factor of coating are as follows: 0.53, the average friction factor of 40Cr steel under 1000g load-up condition are as follows: 0.4；Ni base applies
Hardness, corrosion resistance and the wear-resisting property of layer are superior to 40Cr steel, and performance meets the requirements.
Embodiment 6
A kind of preparation method of 40Cr steel surface build-up wear-resistant layer, the specific steps are as follows:
Step 1: weighing Ni based powders (wherein carbon dust granularity is 100 mesh, remaining is 60 mesh), carbon dust by mass percentage
0.4%, chromium powder 7%, silicon powder 0.6%, boron powder 0.5%, nickel powder 91%, iron powder 0.5%, the sum of above constituent mass percentage is
100%；
Step 2: according to corresponding ball needed for the Mass Calculation of weighed other raw material powders in addition to carbon dust of step 1
Grind the quality of pearl, the mass ratio of every kind of raw material powder and ball milling pearl is 1:20, wherein the diameter of ball milling pearl include 6mm, 8mm,
Tri- kinds of specifications of 10mm, the pearl quantity ratio of three kinds of different-diameters is 1:1:1 in mechanical milling process, and every kind of raw material powder is placed on weighing
It is poured into together with ball milling pearl after being soaked on paper with dehydrated alcohol and carries out ball-milling treatment in ball grinder, the specific process is as follows: to ball
Applying argon gas vacuumizes grinding machine repeatedly, repeats 3~5 times, ball mill parameter is arranged are as follows: revolving speed 400r/min, ball milling 20h, positive and negative rotation
10min/ times；One week is stood after ball milling and is taken out, and raw material powder each after ball-milling treatment and carbon dust are carried out to mix to obtain the painting of Ni base
Layer powder；
Step 3: by diameter be 50mm, the 40Cr steel bar of a length of 40mm is put into the container equipped with acetone and carries out ultrasonic wave
10min is cleaned in cleaning；The Ni base coating powder prepared in step 2 is put into oven and is dried, drying box parameter is set
Are as follows: drying time 1h, drying temperature are 80 DEG C；Built-up welding Ni base is carried out to 40Cr steel bar surface using synchronous laser cladding
Coated powder, specific works condition are are as follows: output power 3kw, spot diameter 5mm, scanning speed 300mm/min, powder feeding angle
70 °, powder feed rate 90g/min, using Ar gas as protective gas, coat is with a thickness of 4mm, so that Ni base coating be made.
The Ni base coating metallographic structure obtained by embodiment 6 as shown in fig. 6, crystal grain is coarse compared with Fe base, dendrite mainly with
Based on cellular crystal and column crystal.After tested, the microhardness average value of coating are as follows: 360.17HV0.5, the microhardness of 40Cr steel
Average value are as follows: 230HV0.5；The open circuit potential of coating are as follows: the open circuit potential of -0.252V, 40Cr steel are as follows: -0.45V；It is carried in 1000g
The average friction factor of coating under the conditions of lotus are as follows: 0.58, the average friction factor of 40Cr steel under 1000g load-up condition are as follows:
0.4；Hardness, corrosion resistance and the wear-resisting property of Ni base coating are superior to 40Cr steel, and performance meets the requirements.
Embodiment 7
A kind of preparation method of 40Cr steel surface build-up wear-resistant layer, the specific steps are as follows:
Step 1: weighing Co based powders (wherein carbon dust granularity is 100 mesh, remaining is 60 mesh), carbon dust by mass percentage
0.6%, chromium powder 25%, silicon powder 1%, tungsten powder 7%, cobalt powder 66%, boron powder 0.4%, the sum of above constituent mass percentage is
100%.
Step 2: according to corresponding ball needed for the Mass Calculation of weighed other raw material powders in addition to carbon dust of step 1
Grind the quality of pearl, the mass ratio of every kind of raw material powder and ball milling pearl is 1:20, wherein the diameter of ball milling pearl include 6mm, 8mm,
Tri- kinds of specifications of 10mm, the pearl quantity ratio of three kinds of different-diameters is 1:1:1 in mechanical milling process, and every kind of raw material powder is placed on weighing
It is poured into together with ball milling pearl after being soaked on paper with dehydrated alcohol and carries out ball-milling treatment in ball grinder, the specific process is as follows: to ball
Applying argon gas vacuumizes grinding machine repeatedly, repeats 3~5 times, ball mill parameter is arranged are as follows: revolving speed 400r/min, ball milling 20h, positive and negative rotation
10min/ times；One week is stood after ball milling and is taken out, and raw material powder each after ball-milling treatment and carbon dust are carried out to mix to obtain the painting of Co base
Layer powder；
Step 3: by diameter be 50mm, the 40Cr steel bar of a length of 40mm is put into the container equipped with acetone and carries out ultrasonic wave
10min is cleaned in cleaning；The Co base coating powder prepared in step 2 is put into oven and is dried, drying box parameter is set
Are as follows: drying time 1h, drying temperature are 80 DEG C；Built-up welding Co base is carried out to 40Cr steel bar surface using synchronous laser cladding
Coated powder, specific works condition are are as follows: output power 3kw, spot diameter 5mm, scanning speed 300mm/min, powder feeding angle
70 °, powder feed rate 90g/min, using Ar gas as protective gas, coat is with a thickness of 4mm, so that Co base coating be made.
As shown in fig. 7, crystal grain is tiny, grain growth orientation is obvious for the Co base coating metallographic structure obtained by embodiment 7,
Based on column crystal and cellular crystal.After tested, the microhardness average value of coating are as follows: 646.22HV0.5, 40Cr steel it is micro- hard
Spend average value are as follows: 230HV0.5；The open circuit potential of coating are as follows: the open circuit potential of -0.233V, 40Cr steel are as follows: -0.45V；In 1000g
The average friction factor of coating under load-up condition are as follows: 0.48, the average friction factor of 40Cr steel under 1000g load-up condition are as follows:
0.4；Hardness, corrosion resistance and the wear-resisting property of Co base coating are superior to 40Cr steel, and performance meets the requirements.
Embodiment 8
A kind of preparation method of 40Cr steel surface build-up wear-resistant layer, the specific steps are as follows:
Step 1: weighing Co based powders (wherein carbon dust granularity is 100 mesh, remaining is 60 mesh), carbon dust by mass percentage
0.8%, chromium powder 27%, silicon powder 2%, tungsten powder 5%, cobalt powder 65.3%, boron powder 0.7%, the sum of above constituent mass percentage is
100%.
Step 2: according to corresponding ball needed for the Mass Calculation of weighed other raw material powders in addition to carbon dust of step 1
Grind the quality of pearl, the mass ratio of every kind of raw material powder and ball milling pearl is 1:20, wherein the diameter of ball milling pearl include 6mm, 8mm,
Tri- kinds of specifications of 10mm, the pearl quantity ratio of three kinds of different-diameters is 1:1:1 in mechanical milling process, and every kind of raw material powder is placed on weighing
It is poured into together with ball milling pearl after being soaked on paper with dehydrated alcohol and carries out ball-milling treatment in ball grinder, the specific process is as follows: to ball
Applying argon gas vacuumizes grinding machine repeatedly, repeats 3~5 times, ball mill parameter is arranged are as follows: revolving speed 400r/min, ball milling 20h, positive and negative rotation
10min/ times；One week is stood after ball milling and is taken out, and raw material powder each after ball-milling treatment and carbon dust are carried out to mix to obtain the painting of Co base
Layer powder；
Step 3: by diameter be 50mm, the 40Cr steel bar of a length of 40mm is put into the container equipped with acetone and carries out ultrasonic wave
10min is cleaned in cleaning；The Co base coating powder prepared in step 2 is put into oven and is dried, drying box parameter is set
Are as follows: drying time 1h, drying temperature are 80 DEG C；Built-up welding Co base is carried out to 40Cr steel bar surface using synchronous laser cladding
Coated powder, specific works condition are are as follows: output power 3kw, spot diameter 5mm, scanning speed 300mm/min, powder feeding angle
70 °, powder feed rate 90g/min, using Ar gas as protective gas, coat is with a thickness of 4mm, so that Co base coating be made.
As shown in figure 8, crystal grain is tiny, dendritic growth orientation there is not Fig. 7 for the Co base coating metallographic structure obtained by embodiment 8
Obviously.After tested, the microhardness average value of coating are as follows: 647.50HV0.5, the microhardness average value of 40Cr steel are as follows:
230HV0.5；The open circuit potential of coating are as follows: the open circuit potential of -0.227V, 40Cr steel are as follows: -0.45V；Under 1000g load-up condition
The average friction factor of coating are as follows: 0.52, the average friction factor of 40Cr steel under 1000g load-up condition are as follows: 0.4；Co base applies
Hardness, corrosion resistance and the wear-resisting property of layer are superior to 40Cr steel, and performance meets the requirements.
Embodiment 9
A kind of preparation method of 40Cr steel surface build-up wear-resistant layer, the specific steps are as follows:
Step 1: weighing Co based powders (wherein carbon dust granularity is 100 mesh, remaining is 60 mesh), carbon dust by mass percentage
0.7%, chromium powder 26.5%, silicon powder 1.8%, tungsten powder 6.5%, cobalt powder 64%, boron powder 0.5%, the above constituent mass percentage it
Be 100%.
Step 2: according to corresponding ball needed for the Mass Calculation of weighed other raw material powders in addition to carbon dust of step 1
Grind the quality of pearl, the mass ratio of every kind of raw material powder and ball milling pearl is 1:20, wherein the diameter of ball milling pearl include 6mm, 8mm,
Tri- kinds of specifications of 10mm, the pearl quantity ratio of three kinds of different-diameters is 1:1:1 in mechanical milling process, and every kind of raw material powder is placed on weighing
It is poured into together with ball milling pearl after being soaked on paper with dehydrated alcohol and carries out ball-milling treatment in ball grinder, the specific process is as follows: to ball
Applying argon gas vacuumizes grinding machine repeatedly, repeats 3~5 times, ball mill parameter is arranged are as follows: revolving speed 400r/min, ball milling 20h, positive and negative rotation
10min/ times；One week is stood after ball milling and is taken out, and raw material powder each after ball-milling treatment and carbon dust are carried out to mix to obtain the painting of Co base
Layer powder；
Step 3: by diameter be 50mm, the 40Cr steel bar of a length of 40mm is put into the container equipped with acetone and carries out ultrasonic wave
10min is cleaned in cleaning；The Co base coating powder prepared in step 2 is put into oven and is dried, drying box parameter is set
Are as follows: drying time 1h, drying temperature are 80 DEG C；Built-up welding Co base is carried out to 40Cr steel bar surface using synchronous laser cladding
Coated powder, specific works condition are are as follows: output power 3kw, spot diameter 5mm, scanning speed 300mm/min, powder feeding angle
70 °, powder feed rate 90g/min, using Ar gas as protective gas, coat is with a thickness of 4mm, so that Co base coating be made.
The Co base coating metallographic structure obtained by embodiment 9 is as shown in figure 9, crystal grain is tiny compared with Fig. 7 and Fig. 8, column crystal
Quantity is reduced, and dendritic growth orientation is obvious.After tested, the microhardness average value of coating are as follows: 648.05HV0.5, 40Cr steel it is aobvious
Microhardness average value are as follows: 230HV0.5；The open circuit potential of coating are as follows: the open circuit potential of -0.2390V, 40Cr steel are as follows: -0.45V；?
The average friction factor of coating under 1000g load-up condition are as follows: 0.50, under 1000g load-up condition the average friction of 40Cr steel because
Number are as follows: 0.4；Hardness, corrosion resistance and the wear-resisting property of Co base coating are superior to 40Cr steel, and performance meets the requirements.
Advantages of the present invention are as follows:
(1) after to 40Cr steel surface built-up welding Fe, Ni, Co base coating, surface hardness is obviously increased, and metallurgical bonding is good
It is good, foundation is provided for 40Cr steel surface reparation；
(2) after to 40Cr steel surface built-up welding Fe, Ni, Co base coating, corrosion resisting property is also obviously reinforced；
(3) after to 40Cr steel surface built-up welding Fe, Ni, Co base coating, antifriction performance is also obviously reinforced, and coating can have
Effect increases the service life of 40Cr steel, to achieve the purpose that reduce cost.
Claims (10)
1. a kind of 40Cr steel surface build-up wear-resistant layer, which is characterized in that the wearing layer including being covered on 40Cr steel surface, it is described resistance to
Mill layer is Fe base coating, Ni base coating or Co base coating；
The Fe base coating is made of following raw material components by mass percentage: carbon dust 0.1%-0.2%, chromium powder 15.5%-
17%, silicon powder 1%-1.5%, molybdenum powder 0.1%-0.2%, nickel powder 1.5%-2.0%, iron powder 79%-81%, the above constituent mass
The sum of percentage is 100%；
The Ni base coating is made of following raw material components by mass percentage: carbon dust 0.2%-0.5%, chromium powder 5%-7%, silicon
Powder 0.1%-1%, boron powder 0.1%-1%, nickel powder 91%-93%, iron powder 0.4%-0.6%, the above constituent mass percentage it
Be 100%；
The Co base coating is made of following raw material components by mass percentage: carbon dust 0.6%-0.8%, chromium powder 25%-27%,
Silicon powder 1%-2%, tungsten powder 5%-7%, cobalt powder 64%-66%, boron powder 0.4%-0.7%, the sum of above constituent mass percentage
It is 100%.
2. a kind of 40Cr steel surface build-up wear-resistant layer according to claim 1, which is characterized in that form the Fe base coating
Raw material powder in carbon dust granularity be 100 mesh, remaining raw material Powder Particle Size is 60 mesh；
The carbon dust granularity formed in the raw material powder of the Ni base coating is 100 mesh, remaining raw material Powder Particle Size is 60 mesh；
The carbon dust granularity formed in the raw material powder of the Co base coating is 100 mesh, remaining raw material Powder Particle Size is 60 mesh.
3. a kind of preparation method of 40Cr steel surface build-up wear-resistant layer, which is characterized in that specific step is as follows:
Step 1: weighing raw material powder needed for preparing wearing layer；
Raw material powder needed for preparing Fe base coating: carbon dust 0.1%-0.2%, chromium powder is weighed by following mass percent
15.5%-17%, silicon powder 1%-1.5%, molybdenum powder 0.1%-0.2%, nickel powder 1.5%-2.0%, iron powder 79%-81% are above
The sum of constituent mass percentage is 100%；
Or weighed by following mass percent prepare Ni base coating needed for raw material powder: carbon dust 0.2%-0.5%, chromium powder 5%-
7%, silicon powder 0.1%-1%, boron powder 0.1%-1%, nickel powder 91%-93%, iron powder 0.4%-0.6%, the above constituent mass hundred
Dividing the sum of ratio is 100%；
Or weighed by following mass percent prepare Co base coating needed for raw material powder: carbon dust 0.6%-0.8%, chromium powder
25%-27%, silicon powder 1%-2%, tungsten powder 5%-7%, cobalt powder 64%-66%, boron powder 0.4%-0.7%, the above constituent mass
The sum of percentage is 100%；
Step 2: preparing wearing layer powder, that is, prepare Fe base coating powder, preparation Ni base coating powder or preparation Co base coating powder
End；
Step 3: in 40Cr steel surface build-up wear-resistant layer powder, the wearing layer powder is Fe base coating powder, Ni base coating powder
End or Co base coating powder.
4. a kind of preparation method of 40Cr steel surface build-up wear-resistant layer according to claim 3, which is characterized in that the step
Rapid 2 specific preparation process are as follows:
When preparing Fe base coating powder, other the every kind raw material powder in addition to carbon dust is subjected to ball-milling treatment respectively, by ball milling
Each raw material powder and carbon dust carry out mixing to obtain Fe base coating powder after processing；
When preparing Ni base coating powder, other the every kind raw material powder in addition to carbon dust is subjected to ball-milling treatment respectively, by ball milling
Each raw material powder and carbon dust carry out mixing to obtain Ni base coating powder after processing；
When preparing Co base coating powder, other the every kind raw material powder in addition to carbon dust is subjected to ball-milling treatment respectively, by ball milling
Each raw material powder and carbon dust carry out mixing to obtain Co base coating powder after processing.
5. a kind of preparation method of 40Cr steel surface build-up wear-resistant layer according to claim 4, which is characterized in that preparation Fe
Base coating powder, when preparing Ni base coating powder or preparing Co base coating powder for other the every kind raw material powder in addition to carbon dust
Ball-milling treatment process it is all the same, it may be assumed that pour into ball grinder together with ball milling pearl after soaking every kind of raw material powder with dehydrated alcohol
Middle carry out ball milling, to ball mill, applying argon gas is vacuumized repeatedly, is repeated 3~5 times, and program parameter is arranged, stands one after ball milling
It is taken out after week, wherein every kind of raw material powder is 1:20 with corresponding ball milling pearl mass ratio.
6. a kind of preparation method of 40Cr steel surface build-up wear-resistant layer according to claim 5, which is characterized in that the ball
The diameter for grinding pearl includes tri- kinds of specifications of 6mm, 8mm, 10mm, and the ball milling pearl ratio of number of three kinds of different-diameters is in mechanical milling process
1:1:1。
7. a kind of preparation method of 40Cr steel surface build-up wear-resistant layer according to claim 5, which is characterized in that step 2
The design parameter of program is set during middle ball-milling treatment are as follows: revolving speed 400r/min, ball milling 20h, positive and negative rotation 10min/ times.
8. a kind of preparation method of 40Cr steel surface build-up wear-resistant layer according to claim 5, which is characterized in that step 3
Specific preparation process are as follows: 40Cr steel surface is cleaned up with acetone, Fe base coating powder, the Ni base that will be prepared in step 2
Coated powder or Co base coating powder are put into oven and are dried, and carry out heap to 40Cr steel surface using synchronous laser cladding
Weld Fe base coating powder, Ni base coating powder or Co base coating powder.
9. a kind of preparation method of 40Cr steel surface build-up wear-resistant layer according to claim 8, which is characterized in that step 3
In, drying time 1h, drying temperature is 80 DEG C.
10. a kind of preparation method of 40Cr steel surface build-up wear-resistant layer according to claim 8, which is characterized in that step 3
In, the specific works condition of synchronous laser cladding are as follows: output power 3kw, spot diameter 5mm, scanning speed 300mm/
Min, 70 ° of powder feeding angle, powder feed rate 90g/min, using Ar gas as protective gas, coat is with a thickness of 4mm.
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Application publication date: 20190723 |