CN109112467A - A kind of soft nitriding processing technology and its tooling of retainer plate - Google Patents
A kind of soft nitriding processing technology and its tooling of retainer plate Download PDFInfo
- Publication number
- CN109112467A CN109112467A CN201811096829.0A CN201811096829A CN109112467A CN 109112467 A CN109112467 A CN 109112467A CN 201811096829 A CN201811096829 A CN 201811096829A CN 109112467 A CN109112467 A CN 109112467A
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- retainer plate
- heating furnace
- tooling
- processing technology
- soft nitriding
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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
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/02—Pretreatment of the material to be coated
-
- 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
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/28—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases more than one element being applied in one step
- C23C8/30—Carbo-nitriding
-
- 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
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/80—After-treatment
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
The invention discloses a kind of soft nitriding processing technology of retainer plate and its toolings, are related to tufftride process field.The technique includes cleaning by degreasing, shove charge, exhaust, heating ventilation, cooling, steam treatment and comes out of the stove; wherein by persistently leading to steam into heating furnace; so that tufftride treated fixed ring surface color uniformly and generates one layer of fine and close oxidation film; and then improve the color uniformity of fixed ring surface; and the gloss on its surface is protected not to be corroded or oxygenated, further such that the color of fixed ring surface is more uniform full.The tooling includes chassis, upper frame, is uniformly arranged on chassis and the outer peripheral multiple struts of upper frame, several be uniformly distributed and the pallet of high-permeability is fixed between strut, and then increase the contact area and contact velocity of fixed ring and atmosphere by the material frame of setting high-permeability, allow atmosphere it is more uniform shroud fixed ring surface, improve fixed ring treated quality and glossiness.
Description
Technical field
The present invention relates to tufftride process field, in particular to the soft nitriding processing technology and its tooling of a kind of retainer plate.
Background technique
Tufftride is exactly nitrocarburizing, this is not single carburizing or nitridation, but based on nitriding, and have carburizing concurrently
A process of surface treatment.The temperature of tufftride is lower than carburizing, but higher than nitrogenizing, and generally at 570 degree or so, and is different from
Need to reheat quenching after carburizing, but direct quenching after keeping the temperature, save one of heating process.
Because some tufftride products are appearance members, such as outlet, the uniform lividity of the high-grade, precision and advanced product requirement of foreign trade, by
It is short in oxidization time of the oil liquid to workpiece, therefore product can cause surface chromatic aberration big because of inhomogeneous cooling, oxidation effectiveness unevenness, workpiece
Surface color is uneven, has much room for improvement.
Summary of the invention
The object of the present invention is to provide a kind of soft nitriding processing technology of retainer plate and its toolings, have and improve retainer plate table
The effect of face color uniformity.
Above-mentioned technical purpose of the invention has the technical scheme that at a kind of tufftride of retainer plate
Science and engineering skill, includes the following steps:
S1: retainer plate is immersed 0.1-0.2h in 75% ethanol solution, removes the greasy dirt on retainer plate surface by cleaning by degreasing；
S2: shove charge, by after being placed in tooling of retainer plate even uniform, tooling and retainer plate are placed in together plus
In hot stove, heating furnace is sealed；
S3: exhaust continues to be passed through nitrogen into heating furnace, and the intake of nitrogen is 100-120L/h, until by heating furnace
Interior air is completely exhausted out；
S4: heating ventilation heats up to heating furnace, until starting to lead to after the temperature in heating furnace reaches 540-550 DEG C
Entering ammonia and carbon dioxide, the intake of ammonia is 2000 ± 10L/h, and the intake of carbon dioxide is 5 ± 0.5L/h, until
Temperature stops heating after reaching 580-590 DEG C, keeps the intake of ammonia and carbon dioxide constant, keeps the temperature 3-4h；
S5: it is cooling, after retainer plate is taken out out of heating furnace, retainer plate is cooled down rapidly；
S6: steam treatment, after the temperature in heating furnace is down to 550-570 DEG C, by retainer plate after cooling again shove charge,
Continue to be passed through steam into heating furnace, keeps the temperature 2-2.5h；
S7: coming out of the stove, and retainer plate is taken out out of heating furnace, and cools down again.
, by persistently leading to steam into heating furnace, make by using above-mentioned technical proposal when the processing of retainer plate tufftride
Tufftride treated that retainer plate surface color is uniform, improve the color uniformity on its surface.Meanwhile retainer plate surface will
One layer of fine and close oxidation film is generated, and then the quality of retainer plate is greatly improved, while protecting the gloss on surface will not be by
Corrosion or oxidation, further improve the color uniformity on retainer plate surface.
The further setting of the present invention are as follows: in step S6, the air pressure in heating furnace is 0.7 ± 0.1MPa.
Effectively increase infiltration layer by setting hyperbar for the air pressure in heating furnace by using above-mentioned technical proposal
Depth, avoid its surface from decarburization phenomenon occur, reduce deformation when retainer plate processing, keep the color on its surface more uniform,
The processing speed that can accelerate retainer plate simultaneously, improves the treatment effeciency of retainer plate.
The further setting of the present invention are as follows: in step S4, the resolution ratio of ammonia is 20-30%.
By using above-mentioned technical proposal because ammonia dissociation rate is lower, to retainer plate provide can the ability of nitriding ion get over
By force, nitriding velocity is higher, and the hardness of effective nitration case is higher, but too low ammonia dissociation rate is easy that retainer plate surface layer is made to form brittleness
Nitride layer, white layer instead reduces the hardness of effective nitration case, therefore is just reached by the ammonia decomposition of setting 20-30% and wanted
It asks, and then improves retainer plate treated quality, improve the color uniformity on its surface, keep its color more uniform full
It is full.
The further setting of the present invention are as follows: the type of cooling in step S5 is air-cooled.
It can be cooled down to retainer plate rapidly by using above-mentioned technical proposal by the type of cooling that setting is air-cooled,
The harden ability of retainer plate is improved, and keeps its layer depth more uniform, so that the color on retainer plate surface is more uniform full.Together
Shi Fengleng can directly dry up the raffinate on retainer plate surface, avoid retainer plate from being corroded and influence glossiness, and then into one
Step improves the color uniformity on retainer plate surface.
The further setting of the present invention are as follows: the type of cooling in step S7 is air-cooled.
By using above-mentioned technical proposal, by the type of cooling for being arranged air-cooled retainer plate is slowly cooled down,
And then the internal stress in retainer plate is eliminated, its ductility or toughness are improved, prevents retainer plate from deforming and cracking, and adjust it slowly
Color, hardness, the strength and toughness of whole retainer plate reach service performance requirement, improve the color uniformity on retainer plate surface,
The service life in retainer plate later period is increased simultaneously.
The further setting of the present invention are as follows: citric acid solution is added in the ethanol solution in step S1.
By using above-mentioned technical proposal, because citric acid has builder effect, it can further improve cleaning product
Performance, and its can rapid precipitate metal ion, prevent pollutant to be re-attached on fabric, at the same make dirt and ash dispersion
And suspension, the cleannes of retainer plate are greatly improved.
The further setting of the present invention are as follows: in step S2, before retainer plate shove charge, first immerse retainer plate in treatment fluid
0.2-0.3h, treatment fluid are the mixed solution of salicylic acid and glycolic.
By using above-mentioned technical proposal, when retainer plate heat treatment, salicylic acid and glycolic are thermally decomposed, at this time
Ion and group after being thermally decomposed can penetrate into retainer plate, and because salicylic acid can effectively remove the stripping on retainer plate surface
Layer is fallen, and its performance is stablized, and the glossiness of circle can be effectively kept fixed；Simultaneously glycolic have corrosion-resistant, reaction is fast,
The advantages that finish is good, and then the glossiness on retainer plate surface is greatly improved, so that the color on retainer plate surface is more
It is uniformly full.
Another object of the present invention is to provide a kind of tufftride of retainer plate handle tooling, including chassis, upper frame, uniformly
It is set to the chassis and the outer peripheral multiple struts of the upper frame, is fixed between the strut several along the strut height
The pallet that direction is uniformly arranged, several pallets are between the chassis and the upper frame.
By using above-mentioned technical proposal, when placing retainer plate, it is placed in retainer plate is smooth in pallet, and then make
It obtains holding spacing between each layer retainer plate and spacing is consistent, so that when logical steam, ammonia and carbon dioxide, steam, ammonia
Gas and carbon dioxide can be more uniform contact retainer plate surface, its permeation quality is influenced when retainer plate being avoided to paste, into
And the effect of tufftride processing is improved, the quality of retainer plate is improved, while making the color on retainer plate surface more uniform
It is full.
The further setting of the present invention are as follows: the pallet include the ring body being fixed between several struts, be set to it is described
The dictyosome of ring body lower end inner wall.
By using above-mentioned technical proposal, by the way that netted pallet is arranged, so that steam, ammonia and carbon dioxide can be with
It directly from top to bottom flows, and then increases retainer plate and the contact area of steam, ammonia and carbon dioxide and contact speed
Degree, allow steam, ammonia and carbon dioxide it is more uniform shroud retainer plate surface, improve the efficiency of tufftride,
The quality for further improving retainer plate simultaneously, also further such that the color on retainer plate surface is more uniform full.
In conclusion the invention has the following advantages:
1. when the processing of retainer plate tufftride, by persistently leading to steam into heating furnace, so that treated is solid for tufftride
Surely circle surface color uniformly generates one layer of fine and close oxidation film, and then improves the color uniformity on retainer plate surface, and protect it
The gloss on surface will not be corroded or oxygenated, further such that the color on retainer plate surface is more uniform full；
2. improving the ability and nitriding velocity of nitriding ion, effectively by setting high pressure and lower ammonia dissociation rate
The hardness of nitration case is improved, while keeping the color on retainer plate surface more uniform full；
3. preventing pollutant to be re-attached to solid by cleaning in ethanol solution and citric acid solution to retainer plate
The surface Ding Quan, while making dirt and ash dispersion and suspending, the cleannes of retainer plate are greatly improved；
4. effectively removing the exfoliation layer on retainer plate surface by the mixed solution of salicylic acid and glycolic, retainer plate is improved
The glossiness on surface, further such that the color on retainer plate surface is more uniform full；
5. increasing the contact area and contact velocity of retainer plate and atmosphere by the material frame of setting high-permeability, make to bring about the desired sensation
Atmosphere can be more uniform shroud retainer plate surface, improve retainer plate treated quality and glossiness.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the tooling of embodiment 2；
Fig. 2 is the structural schematic diagram of the pallet of embodiment 2.
Appended drawing reference: 1, chassis；2, upper frame；3, strut；4, pallet；41, ring body；42, dictyosome.
Specific embodiment
Below in conjunction with attached drawing, invention is further described in detail.
Embodiment 1: a kind of soft nitriding processing technology of retainer plate includes the following steps:
S1: retainer plate is immersed 0.1-0.2h in the mixed solution of 75% ethyl alcohol and citric acid by cleaning by degreasing, and removal is fixed
Enclose the greasy dirt on surface；
By cleaning in ethanol solution and citric acid solution to retainer plate, further improve the property of cleaning product
Can, and can rapid precipitate metal ion, prevent pollutant to be re-attached on fabric, while making dirt and ash dispersion and outstanding
It is floating, the cleannes of retainer plate are greatly improved；
S2: retainer plate is first immersed 0.2-0.3h in treatment fluid by shove charge, and treatment fluid is molten for the mixing of salicylic acid and glycolic
Liquid, then pulls retainer plate out and after being placed in tooling of even uniform, and tooling and retainer plate are placed in heating together
In furnace, heating furnace is sealed；
When retainer plate heat treatment, salicylic acid and glycolic are thermally decomposed, ion and base after being thermally decomposed at this time
Group can penetrate into retainer plate, and because salicylic acid can effectively remove the exfoliation layer on retainer plate surface, and its performance is stablized,
The glossiness of circle can be effectively kept fixed；Glycolic has many advantages, such as that corrosion-resistant, reaction is fast, finish is good simultaneously, in turn
The glossiness on retainer plate surface is greatly improved, so that the color on retainer plate surface is more uniform full；
S3: exhaust continues to be passed through nitrogen into heating furnace, and the intake of nitrogen is 100-120L/h, until by heating furnace
Interior air is completely exhausted out；
S4: heating ventilation heats up to heating furnace, until starting to lead to after the temperature in heating furnace reaches 540-550 DEG C
Entering ammonia and carbon dioxide, the intake of ammonia is 2000 ± 10L/h, and the intake of carbon dioxide is 5 ± 0.5L/h, until
Temperature stops heating after reaching 580-590 DEG C, keeps the intake of ammonia and carbon dioxide constant, keeps the temperature 3-4h, while ammonia
The resolution ratio of gas is 20-30%；
Because ammonia dissociation rate is lower, to retainer plate provide can nitriding ion ability it is stronger, nitriding velocity is higher, available nitrogen
The higher but too low ammonia dissociation rate of the hardness of change layer is easy that retainer plate surface layer is made to form brittleness nitride layer, white layer, makes effectively to nitrogenize instead
The hardness of layer reduces, therefore just reaches requirement by the ammonia decomposition of setting 20-30%, and then improves retainer plate processing
Quality afterwards improves the color uniformity on its surface, keeps its color more uniform full；
S5: it is cooling, after retainer plate is taken out out of heating furnace, retainer plate is cooled down rapidly, the type of cooling is wind
It is cold；
Cooled down to retainer plate rapidly by the type of cooling for being arranged air-cooled, improves the harden ability of retainer plate.Wind simultaneously
It is cold directly to dry up the raffinate on retainer plate surface, it avoids retainer plate from being corroded and influences glossiness, and then further mention
The color uniformity and plumpness on high retainer plate surface.
S6: steam treatment, after the temperature in heating furnace is down to 550-570 DEG C, by retainer plate after cooling again shove charge,
Continue to be passed through steam into heating furnace, keeps the temperature 2-2.5h；
When the processing of retainer plate tufftride, by persistently leading to steam into heating furnace, so that treated is fixed for tufftride
It is uniform to enclose surface color, improves the color uniformity on its surface.Retainer plate surface will generate one layer of fine and close oxidation film simultaneously, into
And the quality of retainer plate is greatly improved, while the gloss on surface being protected not to be corroded or oxygenated, it further improves
The color uniformity on retainer plate surface；
S7: coming out of the stove, and retainer plate is taken out out of heating furnace, and cools down again, and the type of cooling is air-cooled.
| Project | Common tufftride | The present embodiment |
| Surface hardness | 480±1HV | Greater than 500 ± 0.2HV |
| Nitride layer, white layer is deep | 11-18μm | 15-23μm |
| Color | It unevenly, is in striated | It is uniformly full |
| Salt spray test | 60-80h | Greater than 100h |
Embodiment 2: a kind of tufftride of retainer plate handles tooling, as shown in Figure 1 and Figure 2, including chassis 1, upper frame 2, uniformly
It is set to chassis 1 and the outer peripheral multiple struts 3 of upper frame 2, is fixed with and several is uniformly set along 3 short transverse of strut between strut 3
The pallet 4 set, several pallets 4 between chassis 1 and upper frame 2, pallet 4 include be fixed on ring body 41 between several struts 3,
It is set to the dictyosome 42 of 41 lower end inner wall of ring body.
When placing retainer plate, it is placed in retainer plate is smooth in pallet 4, so that being kept between each layer retainer plate
Spacing and spacing is consistent, and by the way that netted pallet 4 is arranged, so that being steamed when logical steam, ammonia and carbon dioxide
Vapour, ammonia and carbon dioxide directly can from top to bottom flow, and contact retainer plate surface that can be more uniform, avoid
Retainer plate influences its permeation quality when pasting, and then improves the effect of tufftride processing, improves the quality of retainer plate, simultaneously
So that the color on retainer plate surface is more uniform full.
Specific embodiment is only explanation of the invention, is not limitation of the present invention, those skilled in the art
It can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but as long as in this hair
All by the protection of Patent Law in bright scope of the claims.
Claims (9)
1. a kind of soft nitriding processing technology of retainer plate, characterized by the following steps:
S1: retainer plate is immersed 0.1-0.2h in 75% ethanol solution, removes the greasy dirt on retainer plate surface by cleaning by degreasing；
S2: tooling and retainer plate are placed in heating furnace for after being placed in tooling of retainer plate even uniform by shove charge together
It is interior, heating furnace is sealed；
S3: exhaust continues to be passed through nitrogen into heating furnace, and the intake of nitrogen is 100-120L/h, until will be in heating furnace
Air is completely exhausted out；
S4: heating ventilation heats up to heating furnace, until starting to be passed through ammonia after the temperature in heating furnace reaches 540-550 DEG C
Gas and carbon dioxide, the intake of ammonia are 2000 ± 10L/h, and the intake of carbon dioxide is 5 ± 0.5L/h, until temperature
Stop heating after reaching 580-590 DEG C, keep the intake of ammonia and carbon dioxide constant, keeps the temperature 3-4h；
S5: it is cooling, after retainer plate is taken out out of heating furnace, retainer plate is cooled down rapidly；
S6: after the temperature in heating furnace is down to 550-570 DEG C, retainer plate after cooling again shove charge continues for steam treatment
It is passed through steam into heating furnace, keeps the temperature 2-2.5h；
S7: coming out of the stove, and retainer plate is taken out out of heating furnace, and cools down again.
2. the soft nitriding processing technology and its tooling of a kind of retainer plate according to claim 1, it is characterised in that: step S6
In, the air pressure in heating furnace is 0.7 ± 0.1MPa.
3. the soft nitriding processing technology and its tooling of a kind of retainer plate according to claim 1, it is characterised in that: step S4
In, the resolution ratio of ammonia is 20-30%.
4. the soft nitriding processing technology and its tooling of a kind of retainer plate according to claim 1, it is characterised in that: step S5
In the type of cooling be it is air-cooled.
5. the soft nitriding processing technology and its tooling of a kind of retainer plate according to claim 1, it is characterised in that: step S7
In the type of cooling be it is air-cooled.
6. the soft nitriding processing technology and its tooling of a kind of retainer plate according to claim 1, it is characterised in that: step S1
In ethanol solution in be added with citric acid solution.
7. the soft nitriding processing technology and its tooling of a kind of retainer plate according to claim 1, it is characterised in that: step S2
In, before fixed ring shove charge, fixed ring is first immersed into 0.2-0.3h in treatment fluid, treatment fluid is the mixing of salicylic acid and glycolic
Solution.
8. a kind of tufftride of retainer plate handles tooling, it is characterised in that: including chassis (1), upper frame (2), be uniformly arranged on institute
Chassis (1) and the upper frame (2) outer peripheral multiple struts (3) are stated, is fixed between the strut (3) several along the strut
(3) pallet (4) that short transverse is uniformly arranged, several pallets (4) are between the chassis (1) and the upper frame (2).
9. a kind of tufftride of retainer plate according to claim 8 handles tooling, it is characterised in that: pallet (4) packet
The dictyosome (42) for including the ring body (41) being fixed between several struts (3), being set to the ring body (41) lower end inner wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811096829.0A CN109112467B (en) | 2018-09-19 | 2018-09-19 | Soft nitriding treatment process for fixing ring |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811096829.0A CN109112467B (en) | 2018-09-19 | 2018-09-19 | Soft nitriding treatment process for fixing ring |
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| CN109112467A true CN109112467A (en) | 2019-01-01 |
| CN109112467B CN109112467B (en) | 2020-11-13 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1441091A (en) * | 1972-08-15 | 1976-06-30 | Barkas Werke Veb | Treatment of piston rods |
| CN1982496A (en) * | 2005-12-12 | 2007-06-20 | 梅塔普拉斯亿欧侬表面精制技术有限责任公司 | Process of gas-nitriding a surface of a workpiece without forming a bond layer, and workpiece |
| CN103898438A (en) * | 2014-04-24 | 2014-07-02 | 鑫光热处理工业(昆山)有限公司 | Gas nitrocarburizing and vapor composite treatment technique |
| CN106756760A (en) * | 2017-01-17 | 2017-05-31 | 重庆长安汽车股份有限公司 | A kind of automobile brake disc wear resistant processing method |
| CN208883970U (en) * | 2018-08-15 | 2019-05-21 | 温岭市大山热处理厂（普通合伙） | A kind of tufftride ancillary equipment |
-
2018
- 2018-09-19 CN CN201811096829.0A patent/CN109112467B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1441091A (en) * | 1972-08-15 | 1976-06-30 | Barkas Werke Veb | Treatment of piston rods |
| CN1982496A (en) * | 2005-12-12 | 2007-06-20 | 梅塔普拉斯亿欧侬表面精制技术有限责任公司 | Process of gas-nitriding a surface of a workpiece without forming a bond layer, and workpiece |
| CN103898438A (en) * | 2014-04-24 | 2014-07-02 | 鑫光热处理工业(昆山)有限公司 | Gas nitrocarburizing and vapor composite treatment technique |
| CN106756760A (en) * | 2017-01-17 | 2017-05-31 | 重庆长安汽车股份有限公司 | A kind of automobile brake disc wear resistant processing method |
| CN208883970U (en) * | 2018-08-15 | 2019-05-21 | 温岭市大山热处理厂（普通合伙） | A kind of tufftride ancillary equipment |
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| Publication number | Publication date |
|---|---|
| CN109112467B (en) | 2020-11-13 |
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