CN108004382A - A kind of vacuum processing technique of cryogenic liquid pump pumping cylinder - Google Patents
A kind of vacuum processing technique of cryogenic liquid pump pumping cylinder Download PDFInfo
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- CN108004382A CN108004382A CN201711361220.7A CN201711361220A CN108004382A CN 108004382 A CN108004382 A CN 108004382A CN 201711361220 A CN201711361220 A CN 201711361220A CN 108004382 A CN108004382 A CN 108004382A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/08—Cleaning involving contact with liquid the liquid having chemical or dissolving effect
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
- B08B3/12—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration by sonic or ultrasonic vibrations
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- 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
- C23C30/00—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
-
- 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
- C23C8/08—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 only one element being applied
- C23C8/10—Oxidising
- C23C8/12—Oxidising using elemental oxygen or ozone
-
- 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
- C23C8/36—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 using ionised gases, e.g. ionitriding
-
- 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
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G5/00—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents
- C23G5/02—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents using organic solvents
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Metallurgy (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
- Electroplating Methods And Accessories (AREA)
Abstract
The invention discloses a kind of vacuum processing technique of cryogenic liquid pump pumping cylinder, mainly including following processing step：a：Machining is carried out to pumping cylinder first, then pumping cylinder surface is polished again；b：After the completion for the treatment of step a, pumping cylinder is sent into vacuum annealing furnace and carries out first time heat treatment, second is carried out after being then quickly cooled to 300 350 DEG C and is heated, vacuum annealing furnace can be sent out by being then quickly cooled to less than 30 DEG C；c：After the completion for the treatment of step b, then the pumping cylinder to sending out stove carries out pre-oxidation treatment, and pumping cylinder is sent into the retort vacuumized, opens valve and carries out nitrogen filling；d：After the completion for the treatment of step c, then pumping cylinder is subjected to ion Plasma Nitriding Treatment, pumping cylinder is finally subjected to plating metal processing again.For the technology with advanced, the comparison that operates is easy, not only greatly improves the hardness, wearability and corrosion resistance on pumping cylinder surface, but also extends the working life of pumping cylinder, ensure that the working performance of pumping cylinder, reduces enterprise's production cost.
Description
Technical field
The present invention relates to a kind of vacuum processing technique technical field, is specially a kind of application of vacuum of cryogenic liquid pump pumping cylinder
Technique.
Background technology
Cryogenic liquid pump（Abbreviation cryogenic pump）It is to be used for transporting low temperature liquid in oil, space division and chemical plant installations（Such as liquid
Oxygen, liquid nitrogen, liquid argon, liquid hydrocarbon and liquefied natural gas etc.）Specific pump, its purposes is from the low place of pressure by cryogenic liquid
It is transported to the high place of pressure；With the development of spatial division technology, cryogenic liquid is widely used and develops；It is in space division
As long as it is act as in equipment：For liquid circulation；Or extract liquid from storage tank and be pressed into vaporizer, given after vaporization
User.
At present, existing cryogenic liquid pump pumping cylinder application of vacuum is also there is the place of some shortcomings, such as；It is existing low
Geothermal liquid pump pumping cylinder vacuuming operations get up more complicated, it is impossible to the hardness, wearability and corrosion resistance on pumping cylinder surface are improved, and
And it have impact on the working life of pumping cylinder, it is impossible to ensure the working performance of pumping cylinder, improve enterprise's production cost, and also it is existing low
The geothermal liquid pump pumping cylinder heat treatment method time is long, while also increases the manpower of twenty percent, it is impossible to degreases and pumping cylinder table
The cleaning in face has not had the effect of double shield.
The content of the invention
The defects of the technical problem to be solved in the present invention is the prior art is overcome, there is provided a kind of cryogenic liquid pump pumping cylinder it is true
Empty treatment process, for the technology with advanced, the comparison that operates is easy, not only greatly improves the hard of pumping cylinder surface
Degree, wearability and corrosion resistance, and the working life of pumping cylinder is extended, it ensure that the working performance of pumping cylinder, reduce enterprise's life
Cost is produced, 2 times of time is saved relative to traditional heat treatment method, while decreases the manpower of twenty percent, it is not only time saving
It is laborsaving and energy-efficient, degreased by chemical solvent tank and use ultrasonic cleaning at the same time, to the clear of pumping cylinder surface
Wash and play the role of double shield, beneficial to the high efficiency of heat treatment.
To solve the above problems, the present invention provides following technical solution：A kind of application of vacuum work of cryogenic liquid pump pumping cylinder
Skill, mainly including following processing step：
a：Machining is carried out to pumping cylinder first, then pumping cylinder surface is polished again；
b：After the completion for the treatment of step a, pumping cylinder is sent into vacuum annealing furnace and carries out first time heat treatment, is then quickly cooled to 300-
Carry out heating for second after 350 DEG C, vacuum annealing furnace can be sent out by being then quickly cooled to less than 30 DEG C；
c：After the completion for the treatment of step b, then the pumping cylinder to sending out stove carries out pre-oxidation treatment, and pumping cylinder is sent into the retort vacuumized
In, open valve and carry out nitrogen filling；
d：After the completion for the treatment of step c, then pumping cylinder is subjected to ion Plasma Nitriding Treatment, pumping cylinder is finally subjected to plating metal processing again.
As a kind of preferred embodiment of the present invention, the rotating speed of the motor of machining is 1900- in the step a
3000r/min, cutting time 15min, temperature during cutting is 50-70 DEG C, and the rotating speed of motor is when pumping cylinder is polished
2500r/min, the time of polishing is 20min, and the thickness of polishing is 0.01-0.03mm.
As a kind of preferred embodiment of the present invention, the step d intermediate ion nitrogen treatment operating temperature for 450~
600 DEG C, the ionic nitriding time is 12h, operating current 36A, operating voltage 550V, and stream of nitrogen gas amount is 1L/min, air pressure
For 550~650Pa, the component and proportioning of the plating metal processing are：50~65wt% of nickel, 20~50wt% of chromium, iron 35~
40wt%。
As a kind of preferred embodiment of the present invention, when being heat-treated in the feeding vacuum annealing furnace by pumping cylinder,
Pumping cylinder is sent into chemical solvent tank first and removes surface and oil contaminant, ultrasonic wave is carried out to pumping cylinder at the same time during degreasing
Cleaning, ultrasonic frequency vibratory 80MHz.
As a kind of preferred embodiment of the present invention, the temperature of the first time heat treatment is 200-220 degree, and at heat
Temperature is continuously improved after reason, and the speed of heating is 20 DEG C/min, when heating-up temperature reaches 600-650 DEG C, keeps the temperature 60-80min,
Second of firing rate is 40 DEG C/min, is heated to 800-900 DEG C, then keeps the temperature 2-2.5h.
As a kind of preferred embodiment of the present invention, temperature is heated to 600-650 DEG C, works as nitrogen by the pre-oxidation treatment
When gas component reaches 60-70%, oxygen is slowly at the uniform velocity filled with, oxygen content 30-40%, keeps the temperature 20-25h, cool down with retort
To less than 40 DEG C.
Compared with prior art, beneficial effects of the present invention are as follows：
A kind of vacuum processing technique of cryogenic liquid pump pumping cylinder of the present invention, for the technology with advanced, the comparison that operates is simple
Just, the hardness, wearability and corrosion resistance on pumping cylinder surface are not only greatly improved, but also extends the working life of pumping cylinder, is protected
The working performance of pumping cylinder has been demonstrate,proved, has reduced enterprise's production cost, 2 times of time is saved relative to traditional heat treatment method,
The manpower of twenty percent is decreased at the same time, it is not only time saving and energy saving but also energy-efficient, degreased by chemical solvent tank and together
When use ultrasonic cleaning, the cleaning to pumping cylinder surface plays the role of double shield, beneficial to the high efficiency of heat treatment.
Brief description of the drawings
Fig. 1 is a kind of flow chart of the vacuum processing technique of cryogenic liquid pump pumping cylinder of the present invention.
Embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes.
Referring to Fig. 1, the present invention provides a kind of technical solution：A kind of vacuum processing technique of cryogenic liquid pump pumping cylinder, it is main
To include following processing step：
a：Machining is carried out to pumping cylinder first, then pumping cylinder surface is polished again；
b：After the completion for the treatment of step a, pumping cylinder is sent into vacuum annealing furnace and carries out first time heat treatment, is then quickly cooled to 300-
Carry out heating for second after 350 DEG C, vacuum annealing furnace can be sent out by being then quickly cooled to less than 30 DEG C；
c：After the completion for the treatment of step b, then the pumping cylinder to sending out stove carries out pre-oxidation treatment, and pumping cylinder is sent into the retort vacuumized
In, open valve and carry out nitrogen filling；
d：After the completion for the treatment of step c, then pumping cylinder is subjected to ion Plasma Nitriding Treatment, pumping cylinder is finally subjected to plating metal processing again.
The rotating speed of the motor of machining is 1900-3000r/min, cutting time 15min in the step a, is cut
When temperature be 50-70 DEG C, the rotating speed of motor be 2500r/min when pumping cylinder is polished, and the time of polishing is 20min, polish
Thickness be 0.01-0.03mm, its role is to the part that effectively can have more pumping cylinder to excision, enhance the complete of pumping cylinder
Whole degree, by pumping cylinder rough surface to polishing, improves the aesthetics of pumping cylinder.
The step d intermediate ion nitrogen treatment operating temperature is 450~600 DEG C, and the ionic nitriding time is 12h, work
Electric current is 36A, and operating voltage 550V, stream of nitrogen gas amount is 1L/min, and air pressure is 550~650Pa, the plating metal processing
Component and proportioning be：50~65wt% of nickel, 20~50wt% of chromium, 35~40wt% of iron, its role is to can effectively pass through from
The solid solution crystals structure formed after son nitridation intensive treatment in pumping cylinder matrix surface is close hexagoinal lattice, and brittleness is big, corrosion resistance
Good, intensity height, greatly improves the hardness and wearability of matrix surface.
When being heat-treated in the feeding vacuum annealing furnace by pumping cylinder, pumping cylinder is sent into chemical solvent tank removes first
Surface and oil contaminant, during degreasing at the same time to pumping cylinder carry out ultrasonic cleaning, ultrasonic frequency vibratory 80MHz, its
Effect is the greasy dirt that can effectively remove pumping cylinder surface, improves efficiency during pumping cylinder heat treatment.
The temperature of the first time heat treatment is 200-220 degree, and temperature is continuously improved after heat treatment, and the speed of heating is
20 DEG C/min, when heating-up temperature reaches 600-650 DEG C, 60-80min is kept the temperature, second of firing rate is 40 DEG C/min,
800-900 DEG C is heated to, then keeps the temperature 2-2.5h, its role is to can effectively accelerate the speed of heat treatment, is improved pair
The effect of pumping cylinder heat treatment.
Temperature is heated to 600-650 DEG C by the pre-oxidation treatment, when nitrogen gas component reaches 60-70%, slowly at the uniform velocity
Oxygen is filled with, oxygen content 30-40%, keeps the temperature 20-25h, less than 40 DEG C are cooled to retort, and its role is to can be effective
Exclude the oxygen inside retort, there is provided the environment of anaerobic.
When the vacuum processing technique operation of cryogenic liquid pump pumping cylinder, machining is carried out to pumping cylinder first, then
Pumping cylinder surface is polished again, then pumping cylinder is sent into vacuum annealing furnace and carries out first time heat treatment, then quick cooling
Carrying out heating for second after to 300-350 DEG C, vacuum annealing furnace can be sent out by being then quickly cooled to less than 30 DEG C, then to sending out
The pumping cylinder of stove carries out pre-oxidation treatment, and pumping cylinder is sent into the retort vacuumized, opens valve and carries out nitrogen filling, then will pump
Cylinder carries out ion Plasma Nitriding Treatment, and pumping cylinder finally is carried out plating metal processing again.
The basic principles, main features and the advantages of the invention have been shown and described above, for this area skill
For art personnel, it is clear that the invention is not restricted to the details of above-mentioned one exemplary embodiment, and without departing substantially from the present invention spirit or
In the case of essential characteristic, the present invention can be realized in other specific forms.Therefore, in all respects, should all incite somebody to action
Embodiment regards exemplary as, and is non-limiting, the scope of the present invention by appended claims rather than on state
Bright restriction, it is intended that including all changes fallen in the implication and scope of the equivalency of claim in the present invention
It is interior.Any reference numeral in claim should not be considered as to the involved claim of limitation.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the invention, although with reference to foregoing reality
Apply example the present invention is described in detail, for those skilled in the art, it still can be to foregoing each implementation
Technical solution described in example is modified, or carries out equivalent substitution to which part technical characteristic.All essences in the present invention
With within principle, any modification, equivalent replacement, improvement and so on, should all be included in the protection scope of the present invention god.
Claims (6)
1. a kind of vacuum processing technique of cryogenic liquid pump pumping cylinder, it is characterised in that mainly including following processing step：
a：Machining is carried out to pumping cylinder first, then pumping cylinder surface is polished again；
b：After the completion for the treatment of step a, pumping cylinder is sent into vacuum annealing furnace and carries out first time heat treatment, is then quickly cooled to 300-
Carry out heating for second after 350 DEG C, vacuum annealing furnace can be sent out by being then quickly cooled to less than 30 DEG C；
c：After the completion for the treatment of step b, then the pumping cylinder to sending out stove carries out pre-oxidation treatment, and pumping cylinder is sent into the retort vacuumized
In, open valve and carry out nitrogen filling；
d：After the completion for the treatment of step c, then pumping cylinder is subjected to ion Plasma Nitriding Treatment, pumping cylinder is finally subjected to plating metal processing again.
A kind of 2. vacuum processing technique of cryogenic liquid pump pumping cylinder according to claim 1, it is characterised in that：The step
The rotating speed of the motor of machining is 1900-3000r/min in a, cutting time 15min, and temperature during cutting is 50-70
DEG C, the rotating speed of motor is 2500r/min when pumping cylinder is polished, and time of polishing is 20min, the thickness of polishing for 0.01-
0.03mm。
A kind of 3. vacuum processing technique of cryogenic liquid pump pumping cylinder according to claim 1, it is characterised in that：The step
D intermediate ion nitrogen treatment operating temperature is 450~600 DEG C, and the ionic nitriding time is 12h, operating current 36A, and work is electric
It is 1L/min to press as 550V, stream of nitrogen gas amount, and air pressure is 550~650Pa, and the component and proportioning of the plating metal processing are：
50~65wt% of nickel, 20~50wt% of chromium, 35~40wt% of iron.
A kind of 4. vacuum processing technique of cryogenic liquid pump pumping cylinder according to claim 1, it is characterised in that：It is described to pump
When being heat-treated in cylinder feeding vacuum annealing furnace, pumping cylinder is sent into chemical solvent tank removes surface and oil contaminant first, removed
Ultrasonic cleaning, ultrasonic frequency vibratory 80MHz are carried out to pumping cylinder at the same time during greasy dirt.
A kind of 5. vacuum processing technique of cryogenic liquid pump pumping cylinder according to claim 1, it is characterised in that：Described first
The temperature of secondary heat treatment is 200-220 degree, and temperature is continuously improved after heat treatment, and the speed of heating is 20 DEG C/min, works as heating
When temperature reaches 600-650 DEG C, 60-80min is kept the temperature, second of firing rate is 40 DEG C/min, is heated to 800-900
DEG C, then keep the temperature 2-2.5h.
A kind of 6. vacuum processing technique of cryogenic liquid pump pumping cylinder according to claim 1, it is characterised in that：The pre- oxygen
Change processing and temperature is heated to 600-650 DEG C, when nitrogen gas component reaches 60-70%, be slowly at the uniform velocity filled with oxygen, oxygen content
For 30-40%, 20-25h is kept the temperature, less than 40 DEG C are cooled to retort.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711361220.7A CN108004382A (en) | 2017-12-18 | 2017-12-18 | A kind of vacuum processing technique of cryogenic liquid pump pumping cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711361220.7A CN108004382A (en) | 2017-12-18 | 2017-12-18 | A kind of vacuum processing technique of cryogenic liquid pump pumping cylinder |
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| Publication Number | Publication Date |
|---|---|
| CN108004382A true CN108004382A (en) | 2018-05-08 |
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ID=62059609
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| CN201711361220.7A Pending CN108004382A (en) | 2017-12-18 | 2017-12-18 | A kind of vacuum processing technique of cryogenic liquid pump pumping cylinder |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111349845A (en) * | 2020-04-10 | 2020-06-30 | 云南绿盾叁联汽车配件有限公司 | Manufacturing method of gearbox guard plate |
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|---|---|---|---|---|
| CN101363109A (en) * | 2008-08-18 | 2009-02-11 | 南京飞燕活塞环股份有限公司 | Ion nitriding method of gray iron piston ring under multicomponent atmosphere |
| CN101603164A (en) * | 2009-07-20 | 2009-12-16 | 长沙南方钽铌有限责任公司 | The vacuum annealing method of tantalum pipe |
| CN104789924A (en) * | 2015-03-24 | 2015-07-22 | 苏州华冲精密机械有限公司 | Surface strengthening technology of food machine screw |
| CN106893822A (en) * | 2015-12-18 | 2017-06-27 | 沈阳透平机械股份有限公司 | Centrifugal compressor 35CrMoV teeth set or the ionic nitriding Technology for Heating Processing of ring gear |
| CN107326157A (en) * | 2017-06-26 | 2017-11-07 | 江苏丰东热处理及表面改性工程技术研究有限公司 | A kind of vacuum heat surface modification technology |
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2017
- 2017-12-18 CN CN201711361220.7A patent/CN108004382A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101363109A (en) * | 2008-08-18 | 2009-02-11 | 南京飞燕活塞环股份有限公司 | Ion nitriding method of gray iron piston ring under multicomponent atmosphere |
| CN101603164A (en) * | 2009-07-20 | 2009-12-16 | 长沙南方钽铌有限责任公司 | The vacuum annealing method of tantalum pipe |
| CN104789924A (en) * | 2015-03-24 | 2015-07-22 | 苏州华冲精密机械有限公司 | Surface strengthening technology of food machine screw |
| CN106893822A (en) * | 2015-12-18 | 2017-06-27 | 沈阳透平机械股份有限公司 | Centrifugal compressor 35CrMoV teeth set or the ionic nitriding Technology for Heating Processing of ring gear |
| CN107326157A (en) * | 2017-06-26 | 2017-11-07 | 江苏丰东热处理及表面改性工程技术研究有限公司 | A kind of vacuum heat surface modification technology |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111349845A (en) * | 2020-04-10 | 2020-06-30 | 云南绿盾叁联汽车配件有限公司 | Manufacturing method of gearbox guard plate |
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