CN103614710B - A kind of steel alloy surface C e-Nd binary rare-earth colloidal sol method for composite ceramic treatment - Google Patents
A kind of steel alloy surface C e-Nd binary rare-earth colloidal sol method for composite ceramic treatment Download PDFInfo
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Abstract
The invention provides a kind of steel alloy surface C e-Nd binary rare-earth colloidal sol method for composite ceramic treatment, particularly corrosive gases compressor steel alloy cylinder body and pistons work nano surface rare-earth sol multiple elements design ceramic reinforced and method for anticorrosion-treating.The method comprises and being first oxidized or anodic oxidation treatment workpiece, forms Fe-Cr-Si multivariant oxide gradient layer 6 ~ 12 μm; Then vacuum impregnation Ce-Nd bielement nano rare-earth sol sealing treatment is carried out; Carry out sulphur nitrogenize after drying and turn brilliant hardening treatment, making its surface form the fine and close thickness possessing excellent mechanical property and corrosion resistance nature is 20 μm ~ 35 μm polynary group of ceramics tissue layer of nitrogen oxygen sulphur rare earth/ferrochrome silicon.Treatment process of the present invention makes the corrosion resistance nature of workpiece and wear resisting property significantly improve, and heat conductivility is excellent, and work-ing life improves 3 to 5 times.
Description
Technical field
The present invention relates to alloy steel surface ceramic deposition method for anticorrosion-treating, especially relate to a kind of corrosive gases compressor steel alloy cylinder body and piston face rare-earth sol nitrogen oxygen sulphur multiple elements design ceramic reinforced method for anticorrosion-treating.
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 being always listed in emphasis tackling key problem.The shorter raising seriously constraining production efficiency in work-ing life of corrosive gases compressor steel alloy cylinder body and piston, the security of Chemical Manufacture also receives serious challenge.
In order to solve corrosive gases compressor steel alloy cylinder body and piston work-ing life shorter problem, prior art measure is: 1, more conversion materials, makes corrosive gases compressor steel alloy cylinder body and piston by using the stainless steel of different model.2, Study on Electrodeposition of Nickel Chromium Alloys.3, nickel coating Chrome metal powder.Recent two decades comes, the improvement direction of this technical field be mainly placed on how by stainless steel-like Material cladding to corrosive gases compressor steel alloy cylinder body and piston face, expect to improve in its mechanical property and chemical corrosion resistance nature technical measures.Such as, 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 to the work-ing life of improving corrosive gases compressor steel alloy cylinder body and piston.Reason is that people are familiar with deficiency for the corrosive gases of (1-5MPa) under comparatively high temps (90-180 DEG C) and pressure condition and the interaction corrosion failure mechanism of compressor casing and piston.Chinese patent 201010584994 discloses steel alloy cylinder surface thermospray nichrome processing method, steel alloy cylinder surface forms the nichrome of thickness 25 μm-55 μm, this technology has been comprised in the middle of above-mentioned technological overview, and this technology is not obvious to corrosive gases compressor steel alloy cylinder body and the raising effect in piston corrosion resistance and work-ing life.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, has very strong chemical catalysis performance to corrosive gases working medium noted earlier.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, thus the acceleration system that this " catalytic chemical corrosion " system has also just become corrosive gases compressor steel alloy cylinder body and piston face to corrode, thus result in corrosive gases compressor steel alloy cylinder body and the serious separability of piston face corrodes, corrosion layer compound is in loose powder shaped.
Summary of the invention
For prior art above shortcomings, the object of the invention is to solve the short problem of prior art corrosive gases compressor steel alloy cylinder body and piston corrosion resistance difference and work-ing life, a kind of steel alloy surface C e-Nd binary rare-earth colloidal sol method for composite ceramic treatment is provided, by rare-earth sol, nitrogen oxygen sulphur multiple elements design ceramic surface strengthening 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 method for composite ceramic treatment, is characterized in that, comprise following processing step:
First, workpiece is oxidized or anodic oxidation treatment, forms the Fe-Cr-Si multicomponent oxide nitride layer that thickness is 6 ~ 12 μm;
Secondly, vacuum impregnation Ce-Nd bielement nano rare-earth sol sealing treatment is carried out to workpiece;
Then, drying and processing is carried out to workpiece;
Finally, carry out sulphur nitrogenize and turn brilliant hardening treatment, make its surface form the fine and close polynary group of ceramics tissue layer of nitrogen oxygen sulphur rare earth/ferrochrome silicon; The thickness of the polynary group of ceramics tissue layer of described nitrogen oxygen sulphur rare earth/ferrochrome silicon is 20 μm ~ 35 μm, and it possesses excellent mechanical property and corrosion resistance nature.
Further, the concrete steps of described steel alloy surface C e-Nd binary rare-earth colloidal sol method for composite ceramic treatment are:
The working-surface of A, alloy workpiece carries out being oxidized or anodic oxidation treatment, forms the Fe/Cr/Si multivariant oxide gradient layer that thickness is 6 ~ 12 μm after process;
The temperature of described oxide treatment is 350 ~ 500 DEG C, and the treatment time is 240 ~ 400min;
Described anodizing temperature is 90 ~ 100 DEG C, and the time is 60 ~ 120min; Workpiece after anodizing will use washed with de-ionized water and oven dry in time, and bake out temperature is 120 ~ 200 DEG C;
B, carry out vacuum impregnation Ce-Nd binary rare-earth colloidal sol sealing treatment to the workpiece that steps A obtains, the vacuum degree condition of described process is 20 ~ 30Pa, and the treatment time is 200 ~ 300min;
C, the workpiece obtained by step B carry out drying and processing, and temperature is 120 ~ 200 DEG C, and the treatment time is 200 ~ 300min;
D, the workpiece obtained by step C 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 DEG C, and the treatment time is 200 ~ 400min, and making the working-surface of alloy workpiece form thickness is 20 μm ~ 35 μm rare earth nitrogen oxygen sulphur siderochrome silicon multiple elements design group of ceramics tissue layer; Wherein, rare earth nitrogen oxygen sulphur siderochrome silicon multiple elements design group of ceramics tissue layer is by square, water chestnut side with hexagonal system ceramic phase is heterogeneous is composited.
Further, in described steps A, being oxidized described alloy workpiece or before anodic oxidation treatment, first carrying out conditioning heat treatment and accurate machining to above-mentioned workpiece, 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 surface of alloy workpiece is formed polynary group of ceramics tissue layer of nitrogen oxygen sulphur rare earth/ferrochrome silicon that fine and close thickness is 20 μm-35 μm, this tight zone possesses excellent mechanical property and corrosion resistance nature.Wherein, nitrogen oxygen sulphur rare earth/siderochrome silicon multiple elements design group of ceramics tissue layer is by square, water chestnut side and hexagonal system ceramic phase is heterogeneous is composited, to gas compressor cylinder body with pistons work surface metallurgic in conjunction with set, the corrosion resistance nature of workpiece and wear resisting property are significantly improved, and heat conductivility is excellent, the corrosion resistance nature of the workpiece of process can be made to improve 6 times, and work-ing life improves 3 to 5 times.
2, the present invention is by improving the chemical bond energy (bonding force) of alloy workpiece material, and the mechanical property that both improve material turn improves 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, corrosive gases medium and alloyed steel work-piece matrix are isolated, what energy was intact protects compressor casing and piston article matrix, realizes the object improving workpiece corrosion resistance nature; Meanwhile, surface strength and the wear resisting property of workpiece is also improved.
3, the alloy workpiece of the inventive method process can realize 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 DEG C) 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 cost, work-ing life can improve 3 to 5 times, improves production security.
Embodiment
Be described in further detail the present invention below by embodiment, following examples are nonlimiting examples.
embodiment 1:
A kind of steel alloy surface C e-Nd binary rare-earth colloidal sol method for composite ceramic treatment, comprises following processing step:
First normalizing treatment and corresponding smart machining are carried out to casting (or forging) blank of higher chromium content alloy steel cylinder sleeve and piston; Then carry out according to following processing step:
A, through processing after workpiece (cylinder body and piston) must through cleaning after carry out oxide treatment or anodic oxidation treatment to it again, the Fe/Cr/Si multivariant oxide gradient thickness 12 μm obtained after oxide treatment or anodic oxidation treatment;
The temperature condition of described oxide treatment is 500 DEG C, and the treatment time is 400min;
Or employing anodic oxidation treatment, described anodizing temperature is 90 DEG C, and the time is 120min; Workpiece after anodizing will use washed with de-ionized water and oven dry in time, and bake out temperature is 200 DEG C, and drying time is 400min.
B, vacuum impregnation Ce-Nd binary rare-earth colloidal sol sealing treatment is carried out to the workpiece (cylinder body and piston) that steps A obtains; Get rid of the gas of zone of oxidation surface and surface micropore absorption thereof, rare-earth sol fills up micropore and at workpiece surface even spread.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 process is 20Pa, and the treatment time is 300min.
C, the workpiece (cylinder body and piston) obtained by step B carry out drying and processing, and temperature is 200 DEG C, and the treatment time is 300min.
D, the workpiece obtained by step C carry out gas sulphur nitrogenize process, 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 DEG C, and the treatment time is 400min, and making the working-surface of cylinder sleeve and piston form thickness is 35 μm of rare earth nitrogen oxygen sulphur siderochrome silicon multiple elements design group of ceramics tissue layer.Wherein, rare earth nitrogen oxygen sulphur siderochrome silicon multiple elements design group of ceramics tissue layer is by square, water chestnut side with hexagonal system ceramic phase is heterogeneous is composited.
embodiment 2:
A kind of steel alloy surface C e-Nd binary rare-earth colloidal sol method for composite ceramic treatment, comprises following processing step:
First normalizing treatment and corresponding smart machining are carried out to casting (or forging) blank of higher chromium content alloy steel cylinder sleeve and piston; Then carry out according to following processing step:
A, through processing after workpiece must through cleaning after carry out oxide treatment or anodic oxidation treatment to it again, the Fe/Cr/Si multivariant oxide gradient thickness 13 μm obtained after oxide treatment or anodic oxidation treatment;
The temperature condition of described oxide treatment is 490 DEG C, and the treatment time is 380min;
Or employing anodic oxidation treatment, described anodizing temperature is 90 DEG C, and the time is 90min.Workpiece after anodizing will use washed with de-ionized water and oven dry in time, and bake out temperature is 180 DEG C, and drying time is 380min;
B, vacuum impregnation Ce ~ Nd binary rare-earth colloidal sol sealing treatment is carried out to the workpiece that steps A obtains; The vacuum degree condition of described process 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 obtained by step B and piston carry out drying and processing, and temperature is 150 DEG C; Treatment time is 240min.
D, the workpiece obtained by step C 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 DEG C, and the treatment time is 300min, and making the working-surface of cylinder sleeve and piston form thickness is 28 μm of rare earth nitrogen oxygen sulphur siderochrome silicon multiple elements design group of ceramics tissue layer.Wherein, rare earth nitrogen oxygen sulphur siderochrome silicon multiple elements design group of ceramics tissue layer is by square, water chestnut side with hexagonal system ceramic phase is heterogeneous is composited.
embodiment 3:
A kind of steel alloy surface C e-Nd binary rare-earth colloidal sol method for composite ceramic treatment, comprises following processing step:
First normalizing treatment and corresponding smart machining are carried out to casting (or forging) blank of higher chromium content alloy steel cylinder sleeve and piston; Then carry out according to following processing step:
A, through processing after workpiece must through cleaning after carry out oxide treatment or anodic oxidation treatment to it again, the Fe/Cr/Si multivariant oxide gradient thickness 20 μm obtained after oxide treatment or anodic oxidation treatment;
The temperature condition of described oxide treatment is 480 DEG C, and the treatment time is 320min;
Or employing anodic oxidation treatment, described anodizing temperature is 95 DEG C, and the time is 120min.Workpiece after anodizing will use washed with de-ionized water and oven dry in time.Bake out temperature is 160 DEG C, and drying time is 290min.
B, vacuum impregnation Ce-Nd binary rare-earth colloidal sol sealing treatment is carried out to the workpiece that steps A obtains.The vacuum degree condition of described process 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 obtained by step B and piston carry out drying and processing, and temperature is 180 DEG C; Treatment time is 300min.
D, the workpiece obtained by step C 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 DEG C, and the treatment time is 350min, and making the working-surface of cylinder sleeve and piston form thickness is 29 μm of rare earth nitrogen oxygen sulphur siderochrome silicon multiple elements design group of ceramics tissue layer.Wherein, rare earth nitrogen oxygen sulphur siderochrome silicon multiple elements design group of ceramics tissue layer is by square, water chestnut side with hexagonal system ceramic phase is heterogeneous is composited.
embodiment 4:
A kind of steel alloy surface C e-Nd binary rare-earth colloidal sol method for composite ceramic treatment, comprises following processing step:
First normalizing treatment and corresponding smart machining are carried out to casting (or forging) blank of higher chromium content alloy steel cylinder sleeve and piston; Then carry out according to following processing step:
A, through processing after workpiece must through cleaning after carry out oxide treatment or anodic oxidation treatment to it again, the Fe/Cr/Si multivariant oxide gradient thickness 20 μm obtained after oxide treatment or anodic oxidation treatment;
The temperature condition of described oxide treatment is 500 DEG C, and the treatment time is 380min;
Or employing anodic oxidation treatment, described anodizing temperature is 90 DEG C, and the time is 120min; Workpiece after anodizing will use washed with de-ionized water and oven dry in time, and bake out temperature is 180 DEG C, and drying time is 380min.
B, vacuum impregnation Ce-Nd binary rare-earth colloidal sol sealing treatment is carried out to the workpiece that steps A obtains.The vacuum degree condition of described process 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 obtained by step B and piston carry out drying and processing, and temperature is 180 DEG C; Treatment time is 260min.
D, the workpiece obtained by step C 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 DEG C, and the treatment time is 360min, and making the working-surface of cylinder sleeve and piston form thickness is 35 μm of rare earth nitrogen oxygen sulphur siderochrome silicon multiple elements design group of ceramics tissue layer.Wherein, rare earth nitrogen oxygen sulphur siderochrome silicon multiple elements design group of ceramics tissue layer is by square, water chestnut side with hexagonal system ceramic phase is heterogeneous is composited.
embodiment 5:
A kind of steel alloy surface C e-Nd binary rare-earth colloidal sol method for composite ceramic treatment, comprises following processing step:
First normalizing treatment and corresponding smart machining are carried out to casting (or forging) blank of higher chromium content alloy steel cylinder sleeve and piston; Then carry out according to following processing step:
A, through processing after workpiece must through cleaning after carry out oxide treatment or anodic oxidation treatment to it again, the Fe/Cr/Si multivariant oxide gradient thickness 12 μm obtained after oxide treatment or anodic oxidation treatment;
The temperature condition of described oxide treatment is 500 DEG C, and the treatment time is 380min;
Or employing anodic oxidation treatment, described anodizing temperature is 95 DEG C, and the time is 120min; Workpiece after anodizing will use washed with de-ionized water and oven dry in time; Bake out temperature is 160 DEG C, and drying time is 300min.
B, vacuum impregnation Ce ~ Nd binary rare-earth colloidal sol sealing treatment is carried out to the workpiece that steps A obtains.The vacuum degree condition of described process 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 obtained by step B and piston carry out drying and processing, and temperature is 160 DEG C; Treatment time is 180min.
D, the workpiece obtained by step C 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 DEG C, and the treatment time is 290min, and making the working-surface of cylinder sleeve and piston form thickness is 32 μm of rare earth nitrogen oxygen sulphur siderochrome silicon multiple elements design group of ceramics tissue layer.Wherein, rare earth nitrogen oxygen sulphur siderochrome silicon multiple elements design group of ceramics tissue layer is by square, water chestnut side with hexagonal system ceramic phase is heterogeneous is composited.
embodiment 6:
A kind of steel alloy surface C e-Nd binary rare-earth colloidal sol method for composite ceramic treatment, comprises following processing step:
First normalizing treatment and corresponding smart machining are carried out to casting (or forging) blank of higher chromium content alloy steel cylinder sleeve and piston; Then carry out according to following processing step:
A, through processing after workpiece must through cleaning after carry out oxide treatment or anodic oxidation treatment to it again, the Fe/Cr/Si multivariant oxide gradient thickness 19 μm obtained after oxide treatment or anodic oxidation treatment;
The temperature condition of described oxide treatment is 500 DEG C, and the treatment time is 330min;
Or employing anodic oxidation treatment, described anodizing temperature is 90 DEG C, and the time is 120min; Workpiece after anodizing will use washed with de-ionized water and oven dry in time, and bake out temperature is 140 DEG C, and drying time is 320min.
B, vacuum impregnation Ce ~ Nd binary rare-earth colloidal sol sealing treatment is carried out to the workpiece that steps A obtains.The vacuum degree condition of described process 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 obtained by step B and piston carry out drying and processing, and temperature is 150 DEG C; Treatment time is 240min.
D, the workpiece obtained by step C 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 DEG C, and the treatment time is 300min, and making the working-surface of cylinder sleeve and piston form thickness is 33 μm of rare earth nitrogen oxygen sulphur siderochrome silicon multiple elements design group of ceramics tissue layer.Wherein, rare earth nitrogen oxygen sulphur siderochrome silicon multiple elements design group of ceramics tissue layer is by square, water chestnut side with hexagonal system ceramic phase is heterogeneous is composited.
embodiment 7:
A kind of steel alloy surface C e-Nd binary rare-earth colloidal sol method for composite ceramic treatment, comprises following processing step:
First normalizing treatment and corresponding smart machining are carried out to casting (or forging) blank of higher chromium content alloy steel cylinder sleeve and piston; Then carry out according to following processing step:
A, through processing after workpiece must through cleaning after carry out oxide treatment or anodic oxidation treatment to it again, the Fe/Cr/Si multivariant oxide gradient thickness 12 μm obtained after oxide treatment or anodic oxidation treatment;
The temperature condition of described oxide treatment is 500 DEG C, and the treatment time is 300min;
Or employing anodic oxidation treatment, described anodizing temperature is 90 DEG C, and the time is 100min.Workpiece after anodizing will use washed with de-ionized water and oven dry in time, and bake out temperature is 140 DEG C, and drying time is 180min.
B, vacuum impregnation Ce-Nd binary rare-earth colloidal sol sealing treatment is carried out to the workpiece that steps A obtains.The vacuum degree condition of described process 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 obtained by step B and piston carry out drying and processing, and temperature is 150 DEG C; Treatment time is 180min.
D, the workpiece obtained by step C 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 DEG C, and the treatment time is 300min, and making the working-surface of cylinder sleeve and piston form thickness is 30 μm of rare earth nitrogen oxygen sulphur siderochrome silicon multiple elements design group of ceramics tissue layer.Wherein, rare earth nitrogen oxygen sulphur siderochrome silicon multiple elements design group of ceramics tissue layer is by square, water chestnut side with hexagonal system ceramic phase is heterogeneous is composited.
embodiment 8:
A kind of steel alloy surface C e-Nd binary rare-earth colloidal sol method for composite ceramic treatment, comprises following processing step:
First normalizing treatment and corresponding smart machining are carried out to casting (or forging) blank of higher chromium content alloy steel cylinder sleeve and piston; Then carry out according to following processing step:
A, through processing after workpiece must through cleaning after carry out oxide treatment or anodic oxidation treatment to it again, the Fe/Cr/Si multivariant oxide gradient thickness 14 μm obtained after oxide treatment or anodic oxidation treatment;
The temperature condition of described oxide treatment is 500 DEG C, and the treatment time is 280min;
Or employing anodic oxidation treatment, described anodizing temperature is 90 DEG C, and the time is 120min.Workpiece after anodizing will use washed with de-ionized water and oven dry in time, and bake out temperature is 150 DEG C, and drying time is 270min.
B, vacuum impregnation Ce ~ Nd binary rare-earth colloidal sol sealing treatment is carried out to the workpiece that steps A obtains.The vacuum degree condition of described process 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 obtained by step B and piston carry out drying and processing, and temperature is 150 DEG C; Treatment time is 300min.
D, the workpiece obtained by step C 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 DEG C, and the treatment time is 300min, and making the working-surface of cylinder sleeve and piston form thickness is 29 μm of rare earth nitrogen oxygen sulphur siderochrome silicon multiple elements design group of ceramics tissue layer.Wherein, rare earth nitrogen oxygen sulphur siderochrome silicon multiple elements design group of ceramics tissue layer 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 of process improve 6 times; Work-ing life improves 3 to 5 times.Present method comprises first to compressor cylinder (cover) body with piston is oxidized or anodic oxidation treatment, forms Fe-Cr-Si multivariant oxide gradient layer 6 ~ 12 μm; Then vacuum impregnation Ce-Nd bielement nano rare-earth sol sealing treatment is carried out; Finally carry out sulphur nitrogenize and turn brilliant hardening treatment, making its surface form the fine and close thickness possessing excellent mechanical property and corrosion resistance nature is 20 μm ~ 35 μm polynary group of ceramics tissue layer of nitrogen oxygen sulphur rare earth/ferrochrome silicon; Wherein nitrogen oxygen sulphur rare earth/siderochrome silicon multiple elements design group of ceramics tissue layer is by square, water chestnut side and hexagonal system ceramic phase is heterogeneous is composited, to gas compressor cylinder body with pistons work surface metallurgic in conjunction with set, the corrosion resistance nature of workpiece and wear resisting property are significantly improved; Heat conductivility is excellent.
Claims (5)
1. a steel alloy surface C e-Nd binary rare-earth colloidal sol method for composite ceramic treatment, is characterized in that, comprises following processing step:
First, oxide treatment is carried out to workpiece, form the Fe-Cr-Si multicomponent oxide nitride layer that thickness is 6 ~ 12 μm;
Secondly, vacuum impregnation Ce-Nd bielement nano rare-earth sol sealing treatment is carried out to workpiece;
Then, drying and processing is carried out to workpiece;
Finally, carry out sulphur nitrogenize and turn brilliant hardening treatment, make its surface form the fine and close polynary group of ceramics tissue layer of nitrogen oxygen sulphur rare earth/ferrochrome silicon, the thickness of the polynary group of ceramics tissue layer of described nitrogen oxygen sulphur rare earth/ferrochrome silicon is 20 μm ~ 35 μm.
2. steel alloy surface C e-Nd binary rare-earth colloidal sol method for composite ceramic treatment as claimed in claim 1, it is characterized in that, concrete steps are:
The working-surface of A, alloy workpiece carries out oxide treatment, forms the Fe-Cr-Si multivariant oxide gradient layer that thickness is 6 ~ 12 μm after process;
The temperature of described oxide treatment is 350 ~ 500 DEG C, and the treatment time is 240 ~ 400min;
B, carry out vacuum impregnation Ce-Nd binary rare-earth colloidal sol sealing treatment to the workpiece that steps A obtains, the vacuum degree condition of described process is 20 ~ 30Pa, and the treatment time is 200 ~ 300min;
C, the workpiece obtained by step B carry out drying and processing, and temperature is 120 ~ 200 DEG C, and the treatment time is 200 ~ 300min;
D, the workpiece obtained by step C carry out the nitrogenize of gas sulphur and turn brilliant hardening treatment, and the gaseous media of described sulphur nitriding treatment is H
2s+CS
2+ NH
3; Gas volume is than being H
2s:CS
2: NH
3=(4 ~ 5): (1 ~ 2): (2 ~ 3); Temperature condition is 450 ~ 650 DEG C, and the treatment time is 200 ~ 400min, and making the working-surface of alloy workpiece form thickness is 20 μm ~ 35 μm polynary group of ceramics tissue layer of nitrogen oxygen sulphur rare earth/ferrochrome silicon; Wherein, nitrogen oxygen sulphur rare earth/ferrochrome silicon polynary group of ceramics tissue layer is by square, water chestnut side and hexagonal system ceramic phase is heterogeneous is composited.
3. steel alloy surface C e-Nd binary rare-earth colloidal sol method for composite ceramic treatment as claimed in claim 2, it is characterized in that, in described steps A before oxide treatment is carried out to described alloy workpiece, first carry out conditioning heat treatment and accurate machining to above-mentioned workpiece, described conditioning heat treatment technique is normalizing treatment.
4. steel alloy surface C e-Nd binary rare-earth colloidal sol method for composite ceramic treatment 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 preparation of the monocarboxylic acid peptization precipitator method.
5. steel alloy surface C e-Nd binary rare-earth colloidal sol method for composite ceramic treatment as described in claim 1,2 or 3, it is characterized in that being, described alloy workpiece is corrosive gases compressor steel alloy cylinder body or piston.
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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 |
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| 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 |
| 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 |
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