CN103614710A - Ce-Nd binary rare-earth sol composite ceramic reinforcing treatment method for alloy steel surface - Google Patents
Ce-Nd binary rare-earth sol composite ceramic reinforcing treatment method for alloy steel surface Download PDFInfo
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Abstract
The invention provides a Ce-Nd binary rare-earth sol composite ceramic reinforcing treatment method for an alloy steel surface, and particularly relates to a nano rare-earth sol multi-element composition ceramic reinforcing and anti-corrosion treatment method for working surfaces of an alloy steel cylinder body and piston of a corrosive gas compressor. The method comprises the steps of firstly performing oxidation or anode oxidation treatment on a workpiece to form a Fe-Cr-Si multi-element oxide gradient layer of 6-12 microns; then performing vacuum impregnation Ce-Nd binary nano rare-earth sol sealing treatment; drying and performing sulfur-nitride crystal transformation hardening treatment so as to form a dense nitrogen-oxide-sulfur rare earth/chromium-iron-silicon multi-element ceramic structure layer with thickness of 20-35 microns, perfect mechanical properties and corrosion resistance on the surface. By adopting the treatment method provided by the invention, the corrosion resistance and wear resistance of the workpiece are remarkably improved, the heat conducting property is good, and the service life is prolonged by 3-5 times.
Description
Technical field
The present invention relates to alloy steel surface ceramic deposition method for anticorrosion-treating, especially relate to the polynary composite ceramics strengthening of a kind of corrosive gases compressor steel alloy cylinder body and piston face rare-earth sol nitrogen oxygen sulphur method for anticorrosion-treating.
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Background technology
Corrosive gases (the Cl of chemical industry
2,hCl, H
2s, NH
3, phosgene, hydrazine etc.) and compressor steel alloy cylinder body and the etching problem of piston in Chemical Manufacture application process know in the industry altogether; Also be the technical barrier that is always listed in emphasis tackling key problem.The shorter serious raising that restricts production efficiency in work-ing life of corrosive gases compressor steel alloy cylinder body and piston, the security of Chemical Manufacture has also been subject to serious challenge.
In order to solve shorter problem of corrosive gases compressor steel alloy cylinder body and piston work-ing life, prior art measure is: 1, conversion materials more, and by using the stainless steel of different model to make corrosive gases compressor steel alloy cylinder body and piston.2, Study on Electrodeposition of Nickel Chromium Alloys.3, nickel coating Chrome metal powder.Recent two decades comes, and how the improvement direction of this technical field has mainly been placed on stainless steel-like Material cladding to corrosive gases compressor steel alloy cylinder body and piston face, in expectation its mechanical property of raising and chemical corrosion resistance nature technical measures.For example, hard chrome plating, nickel plating Chrome metal powder, edge stainless steel cylinder sleeve, nickel coating Chrome metal powder etc.; But above-mentioned technological method does not have unusual effect the work-ing life of corrosive gases compressor steel alloy cylinder body and piston to improving.Reason is that people are not enough for the corrosive gases of (1-5MPa) under comparatively high temps (90-180 ℃) and pressure condition and the interaction corrosion failure mechanism of compressor casing and piston understanding.Chinese patent 201010584994 discloses steel alloy cylinder surface thermospray nichrome processing method, steel alloy cylinder surface forms the nichrome of thickness 25 μ m-55 μ m, this technology has been comprised in the middle of above-mentioned technological overview, and this technology is to the raising effect in corrosive gases compressor steel alloy cylinder body and piston corrosion resistance and work-ing life not obvious.The corrosion of stainless steel cylinder sleeve and piston is still very serious.
Applicant studies discovery, in corrosive gases compressor steel alloy cylinder body and pistons work process, because all ferrous materials are the alloy that transition element is matrix, corrosive gases working medium noted earlier is had to very strong chemical catalysis performance.So corrosive gases compressor steel alloy cylinder body and the working-surface of piston have just become the catalyst catalyzed reaction interface of corrosive gases, this thereby " catalytic chemical corrosion " system has also just become the acceleration system of corrosive gases compressor steel alloy cylinder body and piston face corrosion, thereby caused the serious separability corrosion of corrosive gases compressor steel alloy cylinder body and piston face, corrosion layer compound is loose powder shaped.
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Summary of the invention
For prior art above shortcomings, the object of the invention is to solve the problem that prior art corrosive gases compressor steel alloy cylinder body and piston corrosion resistance are poor and work-ing life is short, a kind of steel alloy surface C e-Nd binary rare-earth colloidal sol composite ceramics treatment process is provided, by rare-earth sol, the polynary composite ceramics surface strengthening of nitrogen oxygen sulphur method for anticorrosion-treating, improve corrosive gases compressor steel alloy steel cylinder body and piston work-ing life.
Realize above-mentioned purpose, the technical solution used in the present invention is: a kind of steel alloy surface C e-Nd binary rare-earth colloidal sol composite ceramics treatment process, it is characterized in that, and comprise following processing step:
First, workpiece is oxidized or anodic oxidation treatment, forming thickness is the Fe-Cr-Si multivariant oxide layer of 6～12 μ m;
Secondly, workpiece is carried out to vacuum impregnation Ce-Nd bielement nano rare-earth sol sealing treatment;
Then, workpiece is carried out to drying and processing;
Finally, carry out sulphur nitrogenize and turn brilliant hardening treatment, make its surface form the fine and close polynary ceramic organized layer of nitrogen oxygen sulphur rare earth/ferrochrome silicon; The thickness of the polynary ceramic organized layer of described nitrogen oxygen sulphur rare earth/ferrochrome silicon is 20 μ m～35 μ m, and it possesses good mechanical property and corrosion resistance nature.
Further, the concrete steps of described steel alloy surface C e-Nd binary rare-earth colloidal sol composite ceramics treatment process are:
The working-surface of A, alloy workpiece is oxidized or anodic oxidation treatment, and after processing, forming thickness is the Fe/Cr/Si multivariant oxide gradient layer of 6～12 μ m;
The temperature of described oxide treatment is 350～500 ℃, and the treatment time is 240～400min;
Described anodizing temperature is 90～100 ℃, and the time is 60～120min; Workpiece after anodizing will be used washed with de-ionized water and oven dry in time, and bake out temperature is 120～200 ℃;
B, the workpiece that steps A is obtained carry out vacuum impregnation Ce-Nd binary rare-earth colloidal sol sealing treatment, and the vacuum degree condition of described processing is 20～30Pa, and the treatment time is 200～300min;
C, the workpiece that step B is obtained carry out drying and processing, and temperature is 120～200 ℃, and the treatment time is 200～300min;
D, the workpiece that step C is obtained carry out the nitrogenize of gas sulphur and turn brilliant hardening treatment, and the gaseous media of described sulphur nitriding treatment is HS+CS
2+ NH
3; Gas volume is than being HS:CS
2: NH
3=(4～5): (1～2): (2～3); Temperature condition is 450～650 ℃, and the treatment time is 200～400min, and making the working-surface formation thickness of alloy workpiece is the polynary microstructure of composite ceramics layer of 20 μ m～35 μ m rare earth nitrogen oxygen sulphur siderochrome silicon; Wherein, the polynary microstructure of composite ceramics layer of rare earth nitrogen oxygen sulphur siderochrome silicon is by square, water chestnut side with hexagonal system ceramic phase is heterogeneous is composited.
Further, in described steps A, described alloy workpiece is oxidized or anodic oxidation treatment before, first above-mentioned workpiece is carried out to conditioning heat treatment and accurate machining, described conditioning heat treatment technique is normalizing treatment.
In described step B, in described Ce-Nd binary rare-earth colloidal sol, Ce:Nd mol ratio is 0.5～1.5, and this colloidal sol is water base, and solid content is 10-35%wt; Described colloidal sol adopts the monocarboxylic acid peptization precipitator method preparations such as acetic acid.
Further, described alloy workpiece is corrosive gases compressor steel alloy cylinder body or piston.
Compared to existing technology, the present invention has following beneficial effect:
1, the inventive method makes the surface of alloy workpiece form the polynary ceramic organized layer of nitrogen oxygen sulphur rare earth/ferrochrome silicon that fine and close thickness is 20 μ m-35 μ m, and this tight zone possesses good mechanical property and corrosion resistance nature.Wherein, the polynary microstructure of composite ceramics layer of nitrogen oxygen sulphur rare earth/siderochrome silicon is by square, water chestnut side and hexagonal system ceramic phase is heterogeneous is composited, gas compressor cylinder body is combined to set with pistons work surface metallurgic, corrosion resistance nature and the wear resisting property of workpiece are significantly improved, and heat conductivility is good, can make the corrosion resistance nature of the workpiece processed improve 6 times, improve 3 to 5 times work-ing life.
2, the present invention is by improving the chemical bond energy (bonding force) of alloy workpiece material, not only improved the mechanical property of material but also improved the corrosion resistance nature of material; Corrosion resistance nature is far away higher than ferrous materials, have it be metallurgical binding state closely set cover compressor casing and pistons work surface, by corrosive gases medium and the isolation of alloyed steel work-piece matrix, can be intact protect compressor casing and piston article matrix, realize the object that improves workpiece corrosion resistance nature; Meanwhile, surface strength and the wear resisting property of workpiece have also been improved.
3, the alloy workpiece that the inventive method is processed can be realized corrosive gases compressor steel alloy cylinder body and the working-surface layer material ceramic of piston under elevated pressures (1～5MPa) and comparatively high temps (90～180 ℃) condition; Improve its working-surface corrosion resistance nature and wear resistance; Can significantly improve the work-ing life of cylinder body and piston and reduce production costs, can improve 3 to 5 times work-ing life, improving production security.
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Embodiment
Below by embodiment, the present invention is described in further detail, following examples are indefiniteness embodiment.
embodiment 1:
A steel alloy surface C e-Nd binary rare-earth colloidal sol composite ceramics treatment process, comprises following processing step:
First the casting of higher chromium content alloy steel cylinder sleeve and piston (or forging) blank is carried out to normalizing treatment and corresponding smart machining; Then according to following processing step, carry out:
A, the workpiece (cylinder body and piston) after processing must carry out oxide treatment or anodic oxidation treatment to it again, the Fe/Cr/Si multivariant oxide gradient bed thickness 12 μ m that obtain after oxide treatment or anodic oxidation treatment after cleaning;
The temperature condition of described oxide treatment is 500 ℃, and the treatment time is 400min;
Or employing anodic oxidation treatment, described anodizing temperature is 90 ℃, the time is 120min; Workpiece after anodizing will be used washed with de-ionized water and oven dry in time, and bake out temperature is 200 ℃, and drying time is 400min.
B, the workpiece (cylinder body and piston) that steps A is obtained carry out vacuum impregnation Ce-Nd binary rare-earth colloidal sol sealing treatment; The gas of getting rid of zone of oxidation surface and surface micropore absorption thereof, rare-earth sol fills up micropore and is evenly coated with at workpiece surface.Wherein, in vacuum impregnation Ce-Nd binary rare-earth colloidal sol, Ce:Nd mol ratio is 0.65; Colloidal sol preparation adopts the acetic acid monocarboxylic acid peptization precipitator method; This colloidal sol is water base; Solid content is 23%wt.
The vacuum degree condition of described processing is 20Pa, and the treatment time is 300min.
C, the workpiece (cylinder body and piston) that step B is obtained carry out drying and processing, and temperature is 200 ℃, and the treatment time is 300min.
D, the workpiece that step C is obtained carry out gas sulphur nitrogenizeization to be processed, and the gaseous media of described sulphur nitriding treatment is HS+CS
2+ NH
3; Gas volume is than being HS:CS
2: NH
3=5:2:3; Temperature condition is 650 ℃, and the treatment time is 400min, and making the working-surface formation thickness of cylinder sleeve and piston is the polynary microstructure of composite ceramics layer of 35 μ m rare earth nitrogen oxygen sulphur siderochrome silicon.Wherein, the polynary microstructure of composite ceramics layer of rare earth nitrogen oxygen sulphur siderochrome silicon is by square, water chestnut side with hexagonal system ceramic phase is heterogeneous is composited.
embodiment 2:
A steel alloy surface C e-Nd binary rare-earth colloidal sol composite ceramics treatment process, comprises following processing step:
First the casting of higher chromium content alloy steel cylinder sleeve and piston (or forging) blank is carried out to normalizing treatment and corresponding smart machining; Then according to following processing step, carry out:
A, the workpiece after processing must carry out oxide treatment or anodic oxidation treatment to it again, the Fe/Cr/Si multivariant oxide gradient bed thickness 13 μ m that obtain after oxide treatment or anodic oxidation treatment after cleaning;
The temperature condition of described oxide treatment is 490 ℃, and the treatment time is 380min;
Or employing anodic oxidation treatment, described anodizing temperature is 90 ℃, the time is 90min.Workpiece after anodizing will be used washed with de-ionized water and oven dry in time, and bake out temperature is 180 ℃, and drying time is 380min;
B, the workpiece that steps A is obtained carry out vacuum impregnation Ce～Nd binary rare-earth colloidal sol sealing treatment; The vacuum degree condition of described processing is 20Pa, and the treatment time is 280min; Vacuum impregnation Ce-Nd binary rare-earth colloidal sol, Ce:Nd mol ratio is 0.75; Colloidal sol preparation adopts the acetic acid monocarboxylic acid peptization precipitator method; This colloidal sol is water base; Solid content is 20%wt.
C, the cylinder body that step B is obtained and piston carry out drying and processing, and temperature is 150 ℃; Treatment time is 240min.
D, the workpiece that step C is obtained carry out gas sulphur nitriding treatment, and the gaseous media of described sulphur nitriding treatment is HS+CS
2+ NH
3; Gas volume is than being HS:CS
2: NH
3=5:1:3; Temperature condition is 630 ℃, and the treatment time is 300min, and making the working-surface formation thickness of cylinder sleeve and piston is the polynary microstructure of composite ceramics layer of 28 μ m rare earth nitrogen oxygen sulphur siderochrome silicon.Wherein, the polynary microstructure of composite ceramics layer of rare earth nitrogen oxygen sulphur siderochrome silicon is by square, water chestnut side with hexagonal system ceramic phase is heterogeneous is composited.
embodiment 3:
A steel alloy surface C e-Nd binary rare-earth colloidal sol composite ceramics treatment process, comprises following processing step:
First the casting of higher chromium content alloy steel cylinder sleeve and piston (or forging) blank is carried out to normalizing treatment and corresponding smart machining; Then according to following processing step, carry out:
A, the workpiece after processing must carry out oxide treatment or anodic oxidation treatment to it again, the Fe/Cr/Si multivariant oxide gradient bed thickness 20 μ m that obtain after oxide treatment or anodic oxidation treatment after cleaning;
The temperature condition of described oxide treatment is 480 ℃, and the treatment time is 320min;
Or employing anodic oxidation treatment, described anodizing temperature is 95 ℃, the time is 120min.Workpiece after anodizing will be used washed with de-ionized water and oven dry in time.Bake out temperature is 160 ℃, and drying time is 290min.
B, the workpiece that steps A is obtained carry out vacuum impregnation Ce-Nd binary rare-earth colloidal sol sealing treatment.The vacuum degree condition of described processing is 20Pa, and the treatment time is 280min.In vacuum impregnation Ce-Nd binary rare-earth colloidal sol, Ce:Nd mol ratio is 0.85; Colloidal sol preparation adopts the acetic acid monocarboxylic acid peptization precipitator method; This colloidal sol is water base; Solid content is 15%wt.
C, the cylinder body that step B is obtained and piston carry out drying and processing, and temperature is 180 ℃; Treatment time is 300min.
D, the workpiece that step C is obtained carry out gas sulphur nitriding treatment, and the gaseous media of described sulphur nitriding treatment is HS+CS
2+ NH
3; Gas volume is than being HS:CS
2: NH
3=5:1.5:3.5; Temperature condition is 620 ℃, and the treatment time is 350min, and making the working-surface formation thickness of cylinder sleeve and piston is the polynary microstructure of composite ceramics layer of 29 μ m rare earth nitrogen oxygen sulphur siderochrome silicon.Wherein, the polynary microstructure of composite ceramics layer of rare earth nitrogen oxygen sulphur siderochrome silicon is by square, water chestnut side with hexagonal system ceramic phase is heterogeneous is composited.
embodiment 4:
A steel alloy surface C e-Nd binary rare-earth colloidal sol composite ceramics treatment process, comprises following processing step:
First the casting of higher chromium content alloy steel cylinder sleeve and piston (or forging) blank is carried out to normalizing treatment and corresponding smart machining; Then according to following processing step, carry out:
A, the workpiece after processing must carry out oxide treatment or anodic oxidation treatment to it again, the Fe/Cr/Si multivariant oxide gradient bed thickness 20 μ m that obtain after oxide treatment or anodic oxidation treatment after cleaning;
The temperature condition of described oxide treatment is 500 ℃, and the treatment time is 380min;
Or employing anodic oxidation treatment, described anodizing temperature is 90 ℃, the time is 120min; Workpiece after anodizing will be used washed with de-ionized water and oven dry in time, and bake out temperature is 180 ℃, and drying time is 380min.
B, the workpiece that steps A is obtained carry out vacuum impregnation Ce-Nd binary rare-earth colloidal sol sealing treatment.The vacuum degree condition of described processing is 20Pa, and the treatment time is 300min.Vacuum impregnation Ce～Nd binary rare-earth colloidal sol, Ce:Nd mol ratio is 0.95; Colloidal sol preparation adopts the acetic acid monocarboxylic acid peptization precipitator method; This colloidal sol is water base; Solid content is 15%wt.
C, the cylinder body that step B is obtained and piston carry out drying and processing, and temperature is 180 ℃; Treatment time is 260min.
D, the workpiece that step C is obtained carry out gas sulphur nitriding treatment, and the gaseous media of described sulphur nitriding treatment is HS+CS
2+ NH
3; Gas volume is than being HS:CS
2: NH
3=5:0.5:4.5; Temperature condition is 630 ℃, and the treatment time is 360min, and making the working-surface formation thickness of cylinder sleeve and piston is the polynary microstructure of composite ceramics layer of 35 μ m rare earth nitrogen oxygen sulphur siderochrome silicon.Wherein, the polynary microstructure of composite ceramics layer of rare earth nitrogen oxygen sulphur siderochrome silicon is by square, water chestnut side with hexagonal system ceramic phase is heterogeneous is composited.
embodiment 5:
A steel alloy surface C e-Nd binary rare-earth colloidal sol composite ceramics treatment process, comprises following processing step:
First the casting of higher chromium content alloy steel cylinder sleeve and piston (or forging) blank is carried out to normalizing treatment and corresponding smart machining; Then according to following processing step, carry out:
A, the workpiece after processing must carry out oxide treatment or anodic oxidation treatment to it again, the Fe/Cr/Si multivariant oxide gradient bed thickness 12 μ m that obtain after oxide treatment or anodic oxidation treatment after cleaning;
The temperature condition of described oxide treatment is 500 ℃, and the treatment time is 380min;
Or employing anodic oxidation treatment, described anodizing temperature is 95 ℃, the time is 120min; Workpiece after anodizing will be used washed with de-ionized water and oven dry in time; Bake out temperature is 160 ℃, and drying time is 300min.
B, the workpiece that steps A is obtained carry out vacuum impregnation Ce～Nd binary rare-earth colloidal sol sealing treatment.The vacuum degree condition of described processing is 20Pa, and the treatment time is 210min.Vacuum impregnation Ce～Nd binary rare-earth colloidal sol, Ce:Nd mol ratio is 1.05; Colloidal sol preparation adopts the acetic acid monocarboxylic acid peptization precipitator method; This colloidal sol is water base; Solid content is 18%wt.
C, the cylinder body that step B is obtained and piston carry out drying and processing, and temperature is 160 ℃; Treatment time is 180min.
D, the workpiece that step C is obtained carry out gas sulphur nitriding treatment, and the gaseous media of described sulphur nitriding treatment is HS+CS
2+ NH
3; Gas volume is than being HS:CS
2: NH
3=4:2:4; Temperature condition is 610 ℃, and the treatment time is 290min, and making the working-surface formation thickness of cylinder sleeve and piston is the polynary microstructure of composite ceramics layer of 32 μ m rare earth nitrogen oxygen sulphur siderochrome silicon.Wherein, the polynary microstructure of composite ceramics layer of rare earth nitrogen oxygen sulphur siderochrome silicon is by square, water chestnut side with hexagonal system ceramic phase is heterogeneous is composited.
embodiment 6:
A steel alloy surface C e-Nd binary rare-earth colloidal sol composite ceramics treatment process, comprises following processing step:
First the casting of higher chromium content alloy steel cylinder sleeve and piston (or forging) blank is carried out to normalizing treatment and corresponding smart machining; Then according to following processing step, carry out:
A, the workpiece after processing must carry out oxide treatment or anodic oxidation treatment to it again, the Fe/Cr/Si multivariant oxide gradient bed thickness 19 μ m that obtain after oxide treatment or anodic oxidation treatment after cleaning;
The temperature condition of described oxide treatment is 500 ℃, and the treatment time is 330min;
Or employing anodic oxidation treatment, described anodizing temperature is 90 ℃, the time is 120min; Workpiece after anodizing will be used washed with de-ionized water and oven dry in time, and bake out temperature is 140 ℃, and drying time is 320min.
B, the workpiece that steps A is obtained carry out vacuum impregnation Ce～Nd binary rare-earth colloidal sol sealing treatment.The vacuum degree condition of described processing is 20Pa, and the treatment time is 200min.Vacuum impregnation Ce～Nd binary rare-earth colloidal sol, Ce:Nd mol ratio is 1.15; Colloidal sol preparation adopts the acetic acid monocarboxylic acid peptization precipitator method; This colloidal sol is water base; Solid content is 17%wt.
C, the cylinder body that step B is obtained and piston carry out drying and processing, and temperature is 150 ℃; Treatment time is 240min.
D, the workpiece that step C is obtained carry out gas sulphur nitriding treatment, and the gaseous media of described sulphur nitriding treatment is HS+CS
2+ NH
3; Gas volume is than being HS:CS
2: NH
3=6:1:3; Temperature condition is 650 ℃, and the treatment time is 300min, and making the working-surface formation thickness of cylinder sleeve and piston is the polynary microstructure of composite ceramics layer of 33 μ m rare earth nitrogen oxygen sulphur siderochrome silicon.Wherein, the polynary microstructure of composite ceramics layer of rare earth nitrogen oxygen sulphur siderochrome silicon is by square, water chestnut side with hexagonal system ceramic phase is heterogeneous is composited.
embodiment 7:
A steel alloy surface C e-Nd binary rare-earth colloidal sol composite ceramics treatment process, comprises following processing step:
First the casting of higher chromium content alloy steel cylinder sleeve and piston (or forging) blank is carried out to normalizing treatment and corresponding smart machining; Then according to following processing step, carry out:
A, the workpiece after processing must carry out oxide treatment or anodic oxidation treatment to it again, the Fe/Cr/Si multivariant oxide gradient bed thickness 12 μ m that obtain after oxide treatment or anodic oxidation treatment after cleaning;
The temperature condition of described oxide treatment is 500 ℃, and the treatment time is 300min;
Or employing anodic oxidation treatment, described anodizing temperature is 90 ℃, the time is 100min.Workpiece after anodizing will be used washed with de-ionized water and oven dry in time, and bake out temperature is 140 ℃, and drying time is 180min.
B, the workpiece that steps A is obtained carry out vacuum impregnation Ce-Nd binary rare-earth colloidal sol sealing treatment.The vacuum degree condition of described processing is 20～30Pa, and the treatment time is 180～260min.Vacuum impregnation Ce-Nd binary rare-earth colloidal sol, Ce:Nd mol ratio is 1.25; Colloidal sol preparation adopts the acetic acid monocarboxylic acid peptization precipitator method; This colloidal sol is water base; Solid content is 16%wt.
C, the cylinder body that step B is obtained and piston carry out drying and processing, and temperature is 150 ℃; Treatment time is 180min.
D, the workpiece that step C is obtained carry out gas sulphur nitriding treatment, and the gaseous media of described sulphur nitriding treatment is HS+CS
2+ NH
3; Gas volume is than being HS:CS
2: NH
3=6:1:3; Temperature condition is 600 ℃, and the treatment time is 300min, and making the working-surface formation thickness of cylinder sleeve and piston is the polynary microstructure of composite ceramics layer of 30 μ m rare earth nitrogen oxygen sulphur siderochrome silicon.Wherein, the polynary microstructure of composite ceramics layer of rare earth nitrogen oxygen sulphur siderochrome silicon is by square, water chestnut side with hexagonal system ceramic phase is heterogeneous is composited.
embodiment 8:
A steel alloy surface C e-Nd binary rare-earth colloidal sol composite ceramics treatment process, comprises following processing step:
First the casting of higher chromium content alloy steel cylinder sleeve and piston (or forging) blank is carried out to normalizing treatment and corresponding smart machining; Then according to following processing step, carry out:
A, the workpiece after processing must carry out oxide treatment or anodic oxidation treatment to it again, the Fe/Cr/Si multivariant oxide gradient bed thickness 14 μ m that obtain after oxide treatment or anodic oxidation treatment after cleaning;
The temperature condition of described oxide treatment is 500 ℃, and the treatment time is 280min;
Or employing anodic oxidation treatment, described anodizing temperature is 90 ℃, the time is 120min.Workpiece after anodizing will be used washed with de-ionized water and oven dry in time, and bake out temperature is 150 ℃, and drying time is 270min.
B, the workpiece that steps A is obtained carry out vacuum impregnation Ce～Nd binary rare-earth colloidal sol sealing treatment.The vacuum degree condition of described processing is 20Pa, and the treatment time is 300min.Vacuum impregnation Ce～Nd binary rare-earth colloidal sol, Ce:Nd mol ratio is 1.35; Colloidal sol preparation adopts the acetic acid monocarboxylic acid peptization precipitator method; This colloidal sol is water base; Solid content is 23%wt.
C, the cylinder body that step B is obtained and piston carry out drying and processing, and temperature is 150 ℃; Treatment time is 300min.
D, the workpiece that step C is obtained carry out gas sulphur nitriding treatment, and the gaseous media of described sulphur nitriding treatment is HS+CS
2+ NH
3; Gas volume is than being HS:CS
2: NH
3=6:1:3; Temperature condition is 610 ℃, and the treatment time is 300min, and making the working-surface formation thickness of cylinder sleeve and piston is the polynary microstructure of composite ceramics layer of 29 μ m rare earth nitrogen oxygen sulphur siderochrome silicon.Wherein, the polynary microstructure of composite ceramics layer of rare earth nitrogen oxygen sulphur siderochrome silicon is by square, water chestnut side with hexagonal system ceramic phase is heterogeneous is composited.
To sum up, the inventive method can make the corrosion resistance nature of the workpiece processed improve 6 times; Improve 3 to 5 times work-ing life.Present method comprises first compressor cylinder (cover) body and piston is oxidized or anodic oxidation treatment, forms Fe-Cr-Si multivariant oxide gradient layer 6～12 μ m; Then carry out vacuum impregnation Ce-Nd bielement nano rare-earth sol sealing treatment; Finally carry out sulphur nitrogenize and turn brilliant hardening treatment, making its surface form the fine and close thickness that possesses good mechanical property and corrosion resistance nature is the 20 μ m～35 polynary ceramic organized layers of μ m nitrogen oxygen sulphur rare earth/ferrochrome silicon; Wherein the polynary microstructure of composite ceramics layer of nitrogen oxygen sulphur rare earth/siderochrome silicon is by square, water chestnut side with hexagonal system ceramic phase is heterogeneous is composited, gas compressor cylinder body is combined to set with pistons work surface metallurgic, the corrosion resistance nature of workpiece and wear resisting property are significantly improved; Heat conductivility is good.
Claims (5)
1. a steel alloy surface C e-Nd binary rare-earth colloidal sol composite ceramics treatment process, is characterized in that, comprises following processing step:
First, workpiece is oxidized or anodic oxidation treatment, forming thickness is the Fe-Cr-Si multivariant oxide layer of 6～12 μ m;
Secondly, workpiece is carried out to vacuum impregnation Ce-Nd bielement nano rare-earth sol sealing treatment;
Then, workpiece is carried out to drying and processing;
Finally, carry out sulphur nitrogenize and turn brilliant hardening treatment, make its surface form the fine and close polynary ceramic organized layer of nitrogen oxygen sulphur rare earth/ferrochrome silicon, the thickness of the polynary ceramic organized layer of described nitrogen oxygen sulphur rare earth/ferrochrome silicon is 20 μ m～35 μ m.
2. steel alloy surface C e-Nd binary rare-earth colloidal sol composite ceramics treatment process as claimed in claim 1, is characterized in that, concrete steps are:
The working-surface of A, alloy workpiece is oxidized or anodic oxidation treatment, and after processing, forming thickness is the Fe/Cr/Si multivariant oxide gradient layer of 6～12 μ m;
The temperature of described oxide treatment is 350～500 ℃, and the treatment time is 240～400min;
Or employing anodic oxidation treatment, described anodizing temperature is 90～100 ℃, the time is 60～120min; Workpiece after anodizing will be used washed with de-ionized water and oven dry in time, and bake out temperature is 120～200 ℃;
B, the workpiece that steps A is obtained carry out vacuum impregnation Ce-Nd binary rare-earth colloidal sol sealing treatment, and the vacuum degree condition of described processing is 20～30Pa, and the treatment time is 200～300min;
C, the workpiece that step B is obtained carry out drying and processing, and temperature is 120～200 ℃, and the treatment time is 200～300min;
D, the workpiece that step C is obtained carry out the nitrogenize of gas sulphur and turn brilliant hardening treatment, and the gaseous media of described sulphur nitriding treatment is HS+CS
2+ NH
3; Gas volume is than being HS:CS
2: NH
3=(4～5): (1～2): (2～3); Temperature condition is 450～650 ℃, and the treatment time is 200～400min, and making the working-surface formation thickness of alloy workpiece is the polynary microstructure of composite ceramics layer of 20 μ m～35 μ m rare earth nitrogen oxygen sulphur siderochrome silicon; Wherein, the polynary microstructure of composite ceramics layer of rare earth nitrogen oxygen sulphur siderochrome silicon is by square, water chestnut side with hexagonal system ceramic phase is heterogeneous is composited.
3. steel alloy surface C e-Nd binary rare-earth colloidal sol composite ceramics treatment process as claimed in claim 1 or 2, it is characterized in that, in described steps A described alloy workpiece is oxidized or anodic oxidation treatment before, first above-mentioned workpiece is carried out to conditioning heat treatment and accurate machining, described conditioning heat treatment technique is normalizing treatment.
4. steel alloy surface C e-Nd binary rare-earth colloidal sol composite ceramics treatment process as claimed in claim 2, it is characterized in that being, in described step B, in Ce-Nd binary rare-earth colloidal sol, Ce:Nd mol ratio is 0.5～1.5, and this colloidal sol is water base, and solid content is 10-35%wt; Described colloidal sol adopts the monocarboxylic acid peptization precipitator method preparations such as acetic acid.
5. steel alloy surface C e-Nd binary rare-earth colloidal sol composite ceramics treatment process as described in claim 1,2 or 3, is characterized in that being, described alloy workpiece is corrosive gases compressor steel alloy cylinder body or piston.
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Cited By (3)
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| CN107964677A (en) * | 2017-11-28 | 2018-04-27 | 宁波市鄞州龙腾工具厂 | A kind of high rigidity tow arm |
| CN109686568A (en) * | 2019-01-14 | 2019-04-26 | 珠海格力新元电子有限公司 | Capacitor and preparation method thereof |
| CN116354740A (en) * | 2023-03-30 | 2023-06-30 | 中国科学院上海硅酸盐研究所 | Alumina ceramic-steel composite structure and preparation method thereof |
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| CN101033545A (en) * | 2006-01-10 | 2007-09-12 | 联合工艺公司 | Thermal barrier coating compositions, processes for applying same and articles coated with same |
| CN101562913A (en) * | 2009-05-14 | 2009-10-21 | 杭州新文环保设备厂 | High temperature resistant surface-insulated FeCrAl electrothermal alloy and preparation method thereof |
| EP2172579A2 (en) * | 2008-10-02 | 2010-04-07 | Rolls-Royce Corporation | Mixture and technique for coating an internal surface of an article |
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| CN1584114A (en) * | 2004-06-11 | 2005-02-23 | 上海大学 | Preparation of nano crystal film of rare earth doped strontium cerate |
| CN101033545A (en) * | 2006-01-10 | 2007-09-12 | 联合工艺公司 | Thermal barrier coating compositions, processes for applying same and articles coated with same |
| EP2172579A2 (en) * | 2008-10-02 | 2010-04-07 | Rolls-Royce Corporation | Mixture and technique for coating an internal surface of an article |
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| CN107964677A (en) * | 2017-11-28 | 2018-04-27 | 宁波市鄞州龙腾工具厂 | A kind of high rigidity tow arm |
| CN109686568A (en) * | 2019-01-14 | 2019-04-26 | 珠海格力新元电子有限公司 | Capacitor and preparation method thereof |
| CN116354740A (en) * | 2023-03-30 | 2023-06-30 | 中国科学院上海硅酸盐研究所 | Alumina ceramic-steel composite structure and preparation method thereof |
| CN116354740B (en) * | 2023-03-30 | 2024-02-06 | 中国科学院上海硅酸盐研究所 | Alumina ceramic-steel composite structure and preparation method thereof |
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