CN108130532A - A kind of Cast Iron Surface laser cladding wear impact-resistant coating method - Google Patents
A kind of Cast Iron Surface laser cladding wear impact-resistant coating method Download PDFInfo
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- CN108130532A CN108130532A CN201810006295.1A CN201810006295A CN108130532A CN 108130532 A CN108130532 A CN 108130532A CN 201810006295 A CN201810006295 A CN 201810006295A CN 108130532 A CN108130532 A CN 108130532A
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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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/06—Surface hardening
- C21D1/09—Surface hardening by direct application of electrical or wave energy; by particle radiation
-
- 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
- C22C19/051—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W
- C22C19/056—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W with the maximum Cr content being at least 10% but less than 20%
-
- 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
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F17/00—Multi-step processes for surface treatment of metallic material involving at least one process provided for in class C23 and at least one process covered by subclass C21D or C22F or class C25
Abstract
The invention discloses a kind of Cast Iron Surface laser cladding wear impact-resistant coating method, cladding metal powder is dried 90~120min by (1), and drying temperature is 80~90 DEG C；(2) Cast Iron Surface after mechanical processing with sand paper is polished and carries out frosting treatment, it is for use then to clean greasy dirt with acetone；(3) laser quenching melanism coating is coated in Cast Iron Surface after the machining operation, then carries out laser quenching processing；(4) it treats laser quenching after treatment, coaxial powder-feeding laser melting coating metal alloy prime coat is carried out in established Laser Hardened Layer；(5) coaxial powder-feeding laser melting coating metal alloy wear and shock-resistant layer is carried out again on established metal alloy prime coat.
Description
Technical field
The invention belongs to field of laser processing, are related to a kind of Cast Iron Surface laser cladding wear impact-resistant coating method.
Background technology
Cast iron materials refer to the general name of the alloy of iron, carbon and silicon composition, with good casting property, energy saving, easy reuse etc.
Feature.By carbon state present in cast iron and the difference of form, cast iron can be divided into：Cementite white cast-iron, flake graphite
The conjunction of gray cast iron, temper carbon malleable cast iron, spherical shape spheroidal graphite cast-iron, vermiform vermicular cast iron with adding in appropriate alloying element
Golden ironcasting.At present, cast iron materials are widely used in mechanical processing, automobile, ship and oil due to its excellent performance
The heavy industry such as work field.But in the working environment in more than field, the cast iron member that uses for a long time is vulnerable to different degrees of
Impact and wear-out failure, service life drastically shorten, so as to generate a large amount of energy consumptions, pollution and the wasting of resources.
To improve ironcasting wear and shock-resistant performance, intensive treatment is carried out to ironcasting working surface.At present, normal quenching
It is main surface treatment method with impewdance matching, part researcher also strengthens ironcasting working surface using laser-quenching technique
Energy.But since quenching technical can not change the essential performance of basis material, cause wear and shock-resistant performance boost limited.Using sharp
Light melting and coating technique prepares metal alloy coating and can realize in Iron Casting Surface covers high performance material on original material surface, from
And greatly improve the wear and shock-resistant performance of ironcasting.However, since cast iron phosphorus content is higher, particularly gray cast iron, spheroidal graphite casting
Iron and vermicular cast iron contain a large amount of graphite, can generate a large amount of stomatas and folder in metal alloy coating in laser cladding process
Slag seriously affects the bond strength of coating and cast iron matrix, reduces the wear and shock-resistant performance of coating.Chinese patent CN
The method that 105779997 A disclose deposited nickel-base alloy coating after a kind of vermicular cast iron die surface laser the pre-heat treatment,
Laser power is relatively low during laser pre-treated, can not be inherently eliminated vermicular cast iron due to containing a large amount of graphite and in follow-up cladding
The a large amount of defects generated in the process.Liu Hao etc. carries out cladding NiCoCrAlY coatings after laser alloying on vermicular cast iron, but
The defects of melting and refreezing consolidates, easily cracks stomata, occurs for vermicular cast iron surface during laser alloying, causes follow-up molten
Cracking occurs for the coating covered so as to influence service life.
Invention content
The technology of the present invention solves the problems, such as：It is asked to solve stomata and slag inclusion etc. existing for cast iron materials laser cladding process
Topic provides a kind of Cast Iron Surface laser cladding wear impact-resistant coating method, realizes pore-free and slag inclusion high abrasion impact resistance
The preparation of coating.
The technology of the present invention solution：A kind of Cast Iron Surface laser cladding wear impact-resistant coating method, including walking as follows
Suddenly：
Treat that post laser cladding uses Step 1: metal alloy powders are weighed and are dried in vacuo；
Step 2: Cast Iron Surface is polished with sand paper carries out frosting treatment, it is for use then to clean greasy dirt with acetone；
Step 3: carrying out high power laser light quenching treatment to Cast Iron Surface, Laser Hardened Layer is formed, eliminates Cast Iron Surface
Defect and hole and graphite existing for ablation surface layer；
Step 4: carrying out Laser Cladding Treatment to Cast Iron Surface, argon gas uses good toughness as protection gas, cladding powder,
The strong metal alloy powders of wetting and spreading, powder are blown into casting by coaxial powder-feeding method and by the use of argon gas as powder gas is carried
Iron laser quenching layer surface carries out laser melting coating metal alloy prime coat in established Laser Hardened Layer, mainly as
The articulamentum of cast iron and metal alloy wear and shock-resistant layer makes composite coating form the good knot of pore-free crackle with Cast Iron Surface
It closes；
Step 5: carrying out Laser Cladding Treatment to Cast Iron Surface, argon gas uses wear-resisting resistance to punching as protection gas, cladding powder
Metal alloy powders of good performance are hit, powder is blown into cast iron by coaxial powder-feeding method and by the use of argon gas as powder gas is carried
Metal alloy bottoming layer surface carries out laser melting coating metal alloy wear and shock-resistant on established metal alloy prime coat
Layer.
Further, the step 1 further comprises：By the powder after weighing in 80~90 DEG C of vacuum drying chamber
Dry 90~120min.
Further, the step 3 further comprises：
Laser quenching melanism coating is coated in Cast Iron Surface, then carries out laser quenching processing, the quenching formed
0.2~0.4mm of layer depth, the uniform zero defect of quenching layer, flawless；
Further, the step 4 further comprises：
The metal alloy bottoming layer thickness formed is 0.2~0.4mm；
Further, the step 4 further comprises：
The chemical composition (each element mass percent) of metal alloy powders is used by prime coat：C:0.02%~
0.03%th, Si:0.1%~0.14%, Mn:0.4%~0.46%, Cr:15.5%~16.5%, Co:2.0%~2.8%,
Mo:15.5%~16.5%, W:3.8%~4.6%, Nb:0.31%~0.37%, Fe:0.7%~0.8%, Ni:Surplus；
Further, the step 5 further comprises：
The metal alloy wear and shock-resistant layer thickness formed is 0.8~1.0mm；
Further, the step 5 further comprises：
The chemical composition (each element mass percent) of metal alloy powders is used by wear and shock-resistant layer：C:
0.30%~0.34%, Si:3.5%~4.3%, Cr:10.5%~11.5%, B:2.0%~2.6%, Fe:10.0%~
11.0%th, Ni:Surplus；
Further, in step 3,1000~2000W of laser power, 200~350mm/min of sweep speed, spot diameter 4
~6mm；
Further, in step 4,1200~1700W of laser power, 200~250mm/min of sweep speed, powder feeding rate 2
~4g/min, 2~4mm of spot diameter, 5~8l/h of protection air-flow amount；
Further, in step 5,1500~2000W of laser power, 250~300mm/min of sweep speed, powder feeding rate 6
~8g/min, 2~4mm of spot diameter, 6~11l/h of protection air-flow amount.
The present invention has the advantages that:
(1) during laser quenching, laser can fall the most of graphite scaling loss in ironware surface layer, reduce carbon
Content, the defects of stomata, the slag inclusion of laser melting coating metal alloy coating and matrix combined area can be effectively reduced, make cast iron matrix with
Good metallurgical binding is formed between metal alloy prime coat.
(2) the metal alloy prime coat that laser melting coating is formed is mainly by good toughness, the strong metal alloy powder of wetting and spreading
End is made, and is the articulamentum of cast iron and metal alloy wear and shock-resistant layer, since metal alloy prime coat is with good tough
Property and wetability, between cast iron and metal alloy prime coat formed pore-free crackle metallurgical binding area, it was demonstrated that cast iron base material
There is good combination effect with metal alloy prime coat.
(3) the metal alloy wear and shock-resistant layer that laser melting coating is formed is mainly by with wear and shock-resistant function metals alloy
Powder is made, and because of the good anti-attrition of alloy powder and wear and shock-resistant attribute, related experiment proves that formed metal alloy is resistance to
Grinding shock-resistant layer has preferable wear and shock-resistant performance.
Description of the drawings
Fig. 1 is the method for the present invention process flow chart；
Fig. 2 is vermicular cast iron surface cladding wear and shock-resistant coating metallograph；
Fig. 3 is cast iron surface cladding wear and shock-resistant coating metallograph；
Fig. 4 is spheroidal graphite cast-iron surface cladding wear and shock-resistant coating metallograph；
Fig. 5 is the average abrasion quality versus figure under the conditions of vermicular cast iron different surface treatment method in embodiment 1；
Fig. 6 is the average friction coefficient comparison diagram under the conditions of vermicular cast iron different surface treatment method in embodiment 1；
Fig. 7 is the average impact work(comparison diagram under the conditions of vermicular cast iron different surface treatment method in embodiment 1；
Fig. 8 is vermicular cast iron laser cladding wear impact-resistant coating in embodiment 1 in room temperature and after 500 DEG C of high temperings
Microhardness curve graph.
Specific embodiment
Below in conjunction with the accompanying drawings and the present invention is discussed in detail in specific embodiment.But following embodiment is only limitted to explain this hair
Bright, protection scope of the present invention should include the full content of claim, be not limited only to the present embodiment.
As shown in Figure 1, a kind of specific implementation step of Cast Iron Surface laser cladding wear impact-resistant coating method of the present invention
It is as follows：
Step 1: after metal alloy powders are weighed dry 90 in 80~90 DEG C of vacuum drying chamber~
120min；
Step 2: cast iron member surface to be treated is polished with sand paper carries out frosting treatment, then greasy dirt is cleaned with acetone
For use；
Step 3: carrying out high power laser light quenching treatment to Cast Iron Surface, Laser Hardened Layer is formed, eliminates Cast Iron Surface
Defect and hole；
Laser quenching melanism coating is coated in Cast Iron Surface, then carries out laser quenching processing, wherein laser quenching
Use technological parameter for：1000~2000W of laser power, 200~350mm/min of sweep speed, 4~6mm of spot diameter, institute's shape
Into quenching 0.2~0.4mm of layer depth, the uniform zero defect of quenching layer, flawless；
Step 4: carrying out Laser Cladding Treatment to Cast Iron Surface, argon gas uses good toughness as protection gas, cladding powder,
The strong metal alloy powders of wetting and spreading, powder are blown into casting by coaxial powder-feeding method and by the use of argon gas as powder gas is carried
Iron laser quenching layer surface, the laser melting coating metal alloy prime coat in established Laser Hardened Layer, mainly as cast iron
With the articulamentum of metal alloy wear and shock-resistant layer, the bond strength of composite coating that Cast Iron Surface is formed is improved；
Laser cladding technological parameter is：1200~1700W of laser power, 200~250mm/min of sweep speed, powder feeding speed
2~4g/min of rate, 2~4mm of spot diameter, protection air-flow 5~8l/h of amount, the metal alloy bottoming layer thickness formed are 0.2
~0.4mm；
The chemical composition (each element mass percent) of metal alloy powders is used by prime coat：C:0.02%~
0.03%th, Si:0.1%~0.14%, Mn:0.4%~0.46%, Cr:15.5%~16.5%, Co:2.0%~2.8%,
Mo:15.5%~16.5%, W:3.8%~4.6%, Nb:0.31%~0.37%, Fe:0.7%~0.8%, Ni:Surplus；
Step 5: carrying out Laser Cladding Treatment to Cast Iron Surface, argon gas uses wear-resisting resistance to punching as protection gas, cladding powder
Metal alloy powders of good performance are hit, powder is blown into cast iron by coaxial powder-feeding method and by the use of argon gas as powder gas is carried
Metal alloy bottoming layer surface, the laser melting coating metal alloy wear and shock-resistant layer on established metal alloy prime coat；
Laser cladding technological parameter is：1500~2000W of laser power, 250~300mm/min of sweep speed, powder feeding speed
6~8g/min of rate, 2~4mm of spot diameter, protection gas are argon gas with carrying powder gas, wherein 6~11l/h of protection air-flow amount, institute's shape
Into metal alloy wear and shock-resistant layer thickness be 0.8~1.0mm.
The chemical composition (each element mass percent) of metal alloy powders is used by wear and shock-resistant layer：C:
0.30%~0.34%, Si:3.5%~4.3%, Cr:10.5%~11.5%, B:2.0%~2.6%, Fe:10.0%~
11.0%th, Ni:Surplus；
Embodiment 1
The present embodiment using vermicular cast iron as matrix, bottoming layer material be Co-based alloy powder, chemical composition (each element quality
Percentage) be：C:0.02%th, Si:0.1%th, Mn:0.4%th, Cr:15.5%th, Co:2.0%th, Mo:15.5%th, W:3.8%th, Nb:
0.31%th, Fe:0.7%th, Ni:Surplus；Wear and shock-resistant layer material be iron(-)base powder, chemical composition (each element quality hundred
Divide ratio) be：C:0.30%th, Si:3.5%th, Cr:10.5%th, B:2.0%th, Fe:10.0%th, Ni:Surplus；
Specific implementation step is as follows：
(1) drying two is small in 85 DEG C of vacuum drying chamber after Co-based alloy powder is weighed with iron(-)base powder
When；
(2) vermicular cast iron surface to be treated with sand paper is polished and carries out frosting treatment, it is for use then to clean greasy dirt with acetone；
(3) laser quenching melanism coating is coated on vermicular cast iron surface, then carries out laser quenching processing, wherein swashing
Photoquenching use technological parameter for：Laser power 2000W, sweep speed 350mm/min, spot diameter 6mm, the quenching formed
Layer depth 0.4mm, the uniform zero defect of quenching layer, flawless；
(4) laser quenching after treatment is treated, the laser deposited nickel-base alloy prime coat in established Laser Hardened Layer,
Laser cladding technological parameter is：Laser power 1500W, sweep speed 250mm/min, powder feeding rate 4g/min, spot diameter
4mm, protection gas are argon gas with carrying powder gas, wherein protection air-flow amount 8l/h, and the nickel-base alloy bottoming layer thickness formed is
0.4mm；
(5) after the processing of laser deposited nickel-base alloy prime coat, the laser melting coating iron on established nickel-base alloy prime coat
Based alloy wear and shock-resistant layer, laser cladding technological parameter are：Laser power 2000W, sweep speed 300mm/min, powder feeding speed
Rate 7g/min, spot diameter 3mm, protection gas are argon gas with carrying powder gas, and wherein protection air-flow amount 8l/h, the iron-based formed closes
Golden wear and shock-resistant layer thickness is 0.9mm, and the laser cladding coating pore-free crackle eventually formed is combined with vermicular cast iron surface
Well, zero defect generates, and wear and shock-resistant test proves：The average abrasion mass ratio of vermicular cast iron after Laser Cladding Treatment
Independent laser quenching and untreated vermicular cast iron substantially reduce, and average friction coefficient is substantially reduced, ballistic work increase, wear-resisting
Anti-attrition is significantly improved with impact resistance.
Embodiment 2
The present embodiment using gray cast iron as matrix, bottoming layer material be Co-based alloy powder, chemical composition (each element quality hundred
Divide ratio) be：C:0.025%th, Si:0.12%th, Mn:0.43%th, Cr:16%th, Co:2.4%th, Mo:16%th, W:4.2%th, Nb:
0.34%th, Fe:0.75%th, Ni:Surplus；Wear and shock-resistant layer material be iron(-)base powder, chemical composition (each element quality hundred
Divide ratio) be：C:0.32%th, Si:3.9%th, Cr:11、B:2.3%th, Fe:10.5%th, Ni:Surplus；
Specific implementation step is as follows：
(1) Co-based alloy powder being weighed with Co-based alloy powder, it is small that two are dried in 80 DEG C of vacuum drying chamber
When；
(2) cast iron surface with sand paper is polished and carries out frosting treatment, it is for use then to clean greasy dirt with acetone；
(3) laser quenching melanism coating is coated on cast iron surface, then carries out laser quenching processing, wherein laser
Quenching use technological parameter for：Laser power 1500W, sweep speed 250mm/min, spot diameter 5mm, the quenching layer formed
Deep 0.3mm, the uniform zero defect of quenching layer, flawless；
(4) laser quenching after treatment is treated, the laser deposited nickel-base alloy prime coat in established Laser Hardened Layer,
Laser cladding technological parameter is：Laser power 1700W, sweep speed 250mm/min, powder feeding rate 3g/min, spot diameter
3mm, protection gas are argon gas with carrying powder gas, wherein protection air-flow amount 7l/h, and the nickel-base alloy bottoming layer thickness formed is
0.3mm；
(5) after the processing of laser deposited nickel-base alloy prime coat, the laser melting coating nickel on established nickel-base alloy prime coat
Based alloy wear and shock-resistant layer, laser cladding technological parameter are：Laser power 1500W, sweep speed 280mm/min, powder feeding speed
Rate 6g/min, spot diameter 2mm, protection gas are argon gas with carrying powder gas, and wherein protection air-flow amount 6l/h, the cobalt-based formed closes
Golden wear and shock-resistant layer thickness is 0.8mm, and the laser cladding coating pore-free crackle eventually formed is combined good with cast iron surface
Good, zero defect generates, and the laser cladding coating pore-free crackle eventually formed is well combined with gray cast iron Cast Iron Surface, intact
It falls into and generates, wear and shock-resistant test result is similar to Example 1, and Wear-resistant is significantly improved with impact resistance.
Embodiment 3
The present embodiment using spheroidal graphite cast-iron as matrix, bottoming layer material be Co-based alloy powder, chemical composition (each element quality
Percentage) be：C:0.03%th, Si:0.14%th, Mn:0.46%th, Cr:16.5%th, Co:2.8%th, Mo:16.5%th, W:4.6%th,
Nb:0.37%th, Fe:0.8%th, Ni:Surplus；Wear and shock-resistant layer material is iron(-)base powder chemical composition (each element quality
Percentage) be：C:0.34%th, Si:4.3%th, Cr:11.5%th, B:2.6%th, Fe:11.0%th, Ni:Surplus；
Specific implementation step is as follows：
(1) drying two is small in 90 DEG C of vacuum drying chamber after Co-based alloy powder is weighed with iron(-)base powder
When；
(2) spheroidal graphite cast-iron sand for surface paper is polished and carries out frosting treatment, it is for use then to clean greasy dirt with acetone；
(3) laser quenching melanism coating is coated on spheroidal graphite cast-iron surface after the machining operation, laser is then carried out and quenches
Fire processing, wherein laser quenching use technological parameter for：Laser power 1000W, sweep speed 200mm/min, spot diameter
4mm forms quenching layer depth 0.2mm, the uniform zero defect of quenching layer, flawless；
(4) laser quenching after treatment is treated, the laser deposited nickel-base alloy prime coat in established Laser Hardened Layer,
Laser cladding technological parameter is：Laser power 1200W, sweep speed 230mm/min, powder feeding rate 2g/min, spot diameter
2mm, protection gas are argon gas with carrying powder gas, wherein protection air-flow amount 5l/h, and the nickel-base alloy bottoming layer thickness formed is
0.2mm；
(5) after the processing of laser deposited nickel-base alloy prime coat, the laser melting coating nickel on established nickel-base alloy prime coat
Based alloy wear and shock-resistant layer, laser cladding technological parameter are：Laser power 1800W, sweep speed 250mm/min, powder feeding speed
Rate 8g/min, spot diameter 4mm, protection gas are argon gas with carrying powder gas, wherein protection air-flow amount 11l/h, the iron-based formed
Alloy wear-resisting shock-resistant layer thickness is 1.0mm, and the laser cladding coating pore-free crackle eventually formed is tied with spheroidal graphite cast-iron surface
It closes well, zero defect generates, and wear and shock-resistant test result is similar to Example 1, and Wear-resistant is notable with impact resistance
It improves.
As shown in Fig. 2, wear-resisting composite coating and vermicular cast iron surface form good metallurgical binding, binding site substantially without
Stomata, defect, coating flawless.
As shown in figure 3, wear-resisting composite coating and grey cast-iron surface form good metallurgical binding, binding site substantially without
Stomata, defect, coating flawless.
As shown in figure 4, wear-resisting composite coating and spheroidal graphite cast-iron surface form good metallurgical binding, binding site substantially without
Stomata, defect, coating flawless.
As shown in figure 5, vermicular cast iron is surface is untreated, laser quenching processing and Laser Cladding Treatment in embodiment 1
Under conditions of average abrasion quality be sequentially reduced, abrasion the smaller wear-resisting property of quality it is better, illustrate that Laser Cladding Treatment can have
Effect improves the wear and shock-resistant on vermicular cast iron surface.
As shown in fig. 6, vermicular cast iron is surface is untreated, laser quenching processing and Laser Cladding Treatment in embodiment 1
Under conditions of average friction coefficient be sequentially reduced, the smaller antifriction effect of friction coefficient is better, illustrates that Laser Cladding Treatment can have
Effect improves the anti-attrition on vermicular cast iron surface.
As shown in fig. 7, in embodiment 1 vermicular cast iron in laser quenching processing, surface is untreated and Laser Cladding Treatment
Under conditions of average impact work(be sequentially increased, and the more big then impact resistance of ballistic work is better, illustrates that Laser Cladding Treatment can
To effectively improve the impact resistance on vermicular cast iron surface.
As shown in figure 8, the wear and shock-resistant coating that in embodiment 1 prepared by vermicular cast iron laser melting coating is at normal temperatures with 500
Wearing layer hardness is substantially unchanged after DEG C high tempering, and Laser Hardened Layer hardness is then remarkably decreased, and illustrates that Laser Cladding Treatment can
To effectively improve the high temperature resistant tempering property on vermicular cast iron surface.
It should be noted that according to the various embodiments described above of the present invention, those skilled in the art are can to realize this hair completely
The four corner of bright independent claims and appurtenance, realize process and the same the various embodiments described above of method；And the present invention is not
It elaborates and partly belongs to techniques well known.
Above example is provided just for the sake of the description purpose of the present invention, and is not intended to limit the scope of the present invention, it is real
It is close with embodiment 1 to test result.The scope of the present invention is defined by the following claims.Do not depart from spirit and principles of the present invention and
The various equivalent alterations and modifications made, should all cover within the scope of the present invention.
Claims (10)
- A kind of 1. Cast Iron Surface laser cladding wear impact-resistant coating method, which is characterized in that include the following steps：Step 1: after metal alloy powders are dried in vacuo, treat that post laser cladding uses；Step 2: cast iron surface to be treated is carried out frosting treatment, then cleaning is for use；Step 3: the defects of laser quenching processing is carried out to Cast Iron Surface, Laser Hardened Layer is formed, eliminates Cast Iron Surface and hole And graphite existing for ablation surface layer；Step 4: carrying out Laser Cladding Treatment to Cast Iron Surface, metal alloy powders are by coaxial powder-feeding method and utilize protection Gas is blown into cast iron laser quenching layer surface as powder gas is carried, and laser melting coating metal is carried out in established Laser Hardened Layer Alloy prime coat as cast iron and the articulamentum of metal alloy wear and shock-resistant layer, makes composite coating form nothing with Cast Iron Surface The good combination of stomata crackle；Step 5: carrying out Laser Cladding Treatment to Cast Iron Surface, metal alloy powders are by coaxial powder-feeding method and utilize protection Gas is blown into iron metal alloy bottoming layer surface as powder gas is carried, and laser melting coating gold is carried out on metal alloy prime coat Belong to alloy wear-resisting shock-resistant layer.
- 2. Cast Iron Surface laser cladding wear impact-resistant coating method according to claim 1, it is characterised in that：The step In rapid three, to Cast Iron Surface carry out laser quenching processing when 1000~2000W of laser power, laser scan rate 200~ 350mm/min, 4~6mm of laser spot diameter.
- 3. Cast Iron Surface laser cladding wear impact-resistant coating method according to claim 1, it is characterised in that：The step In rapid three, when carrying out laser quenching processing to Cast Iron Surface, laser quenching melanism coating is coated in Cast Iron Surface, and it is laggard Row laser quenching is handled, and forms laser quenching 0.2~0.4mm of layer depth, the uniform zero defect of quenching layer, flawless.
- 4. Cast Iron Surface laser cladding wear impact-resistant coating method according to claim 1, it is characterised in that：The step In rapid four, when carrying out Laser Cladding Treatment to Cast Iron Surface, 1200~1700W of laser power, laser scan rate 200~ 250mm/min, laser 2~4g/min of powder feeding rate, 2~4mm of laser spot diameter, 5~8l/h of protection air-flow amount.
- 5. Cast Iron Surface laser cladding wear impact-resistant coating method according to claim 1, it is characterised in that：The step In rapid four, metal alloy bottoming layer thickness is 0.2~0.4mm.
- 6. Cast Iron Surface laser cladding wear impact-resistant coating method according to claim 1, it is characterised in that：The step In rapid four, the chemical composition (each element mass percent) of metal alloy powders is used by prime coat：C:0.02%~ 0.03%th, Si:0.1%~0.14%, Mn:0.4%~0.46%, Cr:15.5%~16.5%, Co:2.0%~2.8%, Mo:15.5%~16.5%, W:3.8%~4.6%, Nb:0.31%~0.37%, Fe:0.7%~0.8%, Ni:Surplus.
- 7. Cast Iron Surface laser cladding wear impact-resistant coating method according to claim 1, it is characterised in that：The step In rapid five, when carrying out Laser Cladding Treatment to Cast Iron Surface, 1500~2000W of laser power, laser scan rate 250~ 300mm/min, powder 6~8g/min of powder feeding rate, 2~4mm of laser spot diameter, 6~11l/h of protection air-flow amount.
- 8. Cast Iron Surface laser cladding wear impact-resistant coating method according to claim 1, it is characterised in that：The step In rapid five, metal alloy wear and shock-resistant layer thickness is 0.8~1.0mm.
- 9. Cast Iron Surface laser cladding wear impact-resistant coating method according to claim 1, it is characterised in that：The step In rapid five, the chemical composition (each element mass percent) of metal alloy powders is used by wear and shock-resistant layer：C: 0.30%~0.34%, Si:3.5%~4.3%, Cr:10.5%~11.5%, B:2.0%~2.6%, Fe:10.0%~ 11.0%th, Ni:Surplus.
- 10. Cast Iron Surface laser cladding wear impact-resistant coating method according to claim 1, it is characterised in that：It is described In step 1, metal alloy powders are dried into 90~120min in 80~90 DEG C of vacuum drying chamber.
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