CN109967667A - A kind of raising GH141 alloy rings grain size homogenization method - Google Patents
A kind of raising GH141 alloy rings grain size homogenization method Download PDFInfo
- Publication number
- CN109967667A CN109967667A CN201910297764.4A CN201910297764A CN109967667A CN 109967667 A CN109967667 A CN 109967667A CN 201910297764 A CN201910297764 A CN 201910297764A CN 109967667 A CN109967667 A CN 109967667A
- Authority
- CN
- China
- Prior art keywords
- ring
- finish
- gauge
- heating
- roll
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H1/00—Making articles shaped as bodies of revolution
- B21H1/06—Making articles shaped as bodies of revolution rings of restricted axial length
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
- B21J1/06—Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The present invention relates to a kind of raising GH141 alloy rings grain size homogenization methods, comprising the following steps: step S1: selection and heating；Selecting material is the bar of GH141；Bar is homogenized and is heated；Homogenizing heating temperature is 1100 DEG C；It comes out of the stove after heat preservation, is blank；Step S2: forging base；Forging includes upsetting cake, punching and reaming；Step S3: it is rolled in advance after heating；Ring billet is rolled in advance after 1080 DEG C of homogenization heat, is initially rolled ring；The deflection for initially rolling ring is 20%；Step S4: finish to gauge after heating；Ring is initially rolled after 1080 DEG C of homogenization heat, and is carried out finish to gauge, is obtained most finish to gauge ring；The most deflection of finish to gauge ring is 20%~25%.The present invention guarantees GH141 alloy rings even tissue.
Description
Technical field
The present invention relates to forging technology technical field, in particular to a kind of raising GH141 steel alloy grain size homogenization side
Method.
Background technique
Wrought superalloy is the high-temperature material that Aeronautics and Astronautics and nuclear power industry must be applied, and manufacture Aeronautics and Astronautics starts
The various key parts applied under high temperature environment in machine and nuclear reactor.GH141 alloy is mainly to manufacture aero-engine
Burning Interior Layout wall leading portion and back segment, high-pressure turbine outer ring support ring and fixed ring, high pressure guider outer ring and inside support ring, envelope
Side, combustion chamber back casing, the turbine rotor for obturaging piece and fastener and rocket engine etc. are installed after tight support ring.
The technology of GH141 ring forging in existing production are as follows: for bar through 1120 DEG C of heating → forging base, forging includes upsetting
Cake, punching and horse expand → heating again through 1120 DEG C → and roll ring.
The deficiencies in the prior art are as follows: (1) GH141 ring forging belong to middle-size and small-size ring, and forging wall thickness is relatively thin, and height is smaller,
Temperature drop is very fast in forming process, and heating temperature is higher before rolling ring, and be easy to causeing forging process for fuel, temperature distribution is non-uniform, rolls ring mistake
Journey grain refining effect is bad.(2) last rolling reduction is excessive, and deflection is greater than 40%, and ring forging inside and outside wall is caused to deform
Unevenly.
Mirco structure is there are crystal grain thickness difference is big after the heat treatment of GH141 ring forging in actual production, and general 2~3 grades, i.e.,
Mixed crystal phenomenon exists simultaneously fine grain band segregation phenomenon, causes forging internal stress distribution uneven, subsequent easy to crack.
Summary of the invention
In view of the deficiencies of the prior art, the invention discloses a kind of raising GH141 steel alloy grain size homogenization methods.
The technical solution adopted in the present invention is as follows:
A kind of raising GH141 alloy rings grain size homogenization method, comprising the following steps:
Step S1: selection and heating；Selecting material is the bar of GH141 Nickel-Based Steel；Bar is homogenized and is heated；?
Homogenizing heating temperature is 1100 DEG C；It comes out of the stove after heat preservation, is blank；
Step S2: forging base；Firstly, blank passes through upsetting cake, biscuit is obtained；Then, biscuit is punched out, obtains ring
Base；Last reaming；
Step S3: it is rolled in advance after heating；Ring billet is rolled in advance after 1080 DEG C of homogenization heat, is initially rolled ring；Initially
The deflection for rolling ring is 20%；
Step S4: finish to gauge after heating；Ring is initially rolled after 1080 DEG C of homogenization heat, and is carried out finish to gauge, is obtained most finish to gauge ring；
The most deflection of finish to gauge ring is 20%~25%.
Its further technical characteristic are as follows: it is described it is pre- roll and finish to gauge passes through frictional force between ring and top and bottom rolls,
Ring is drawn between the top and bottom rolls in different rotary direction and is allowed to generate plastic deformation.
Its further technical characteristic are as follows: the top and bottom rolls include topping roll and bottom roll, for cylindrical rigid body；On roll
Roller is identical with the diameter of bottom roll；The revolving speed of topping roll and bottom roll is equal.
Its further technical characteristic are as follows: further include step S5: Physico-chemical tests are carried out after heat treatment；Most finish to gauge ring is added
Heat, heating temperature are 1080 DEG C ± 10 DEG C；Then rapid heating and quenching makes the temperature of most finish to gauge ring reach 1120 DEG C ± 10 DEG C,
Keep the temperature 0.5h；900 DEG C ± 10 DEG C are down to by the air-cooled temperature for making most finish to gauge ring again, keeps the temperature 1h~4h；Dissect super saturated solid solution
Body carries out Physico-chemical tests, observes the crystal grain thickness of most finish to gauge ring.
Its further technical characteristic are as follows: in step s 5, difference≤1 grade of the crystal grain thickness of the most finish to gauge ring is sentenced
It is qualified to be set to detection.
Beneficial effects of the present invention are as follows:
1, bar is heated before forging through 1100 DEG C of homogenization, reduces heating temperature when forging, improves structure refinement effect
Fruit.
2, increase and roll process in advance, reduce most finish to gauge annular strain amount.When rolling in advance, the deflection for initially rolling ring is 20%, finish to gauge
When, the most deflection of finish to gauge ring is 20%~25%, and ring forging inside and outside circle deflection is made to reach unanimity.
3, heating temperature when finish to gauge is controlled；The heating temperature of control finish to gauge remains at 1080 DEG C, to make its group
It knits uniformly, eliminates fine grain band and grain size error.
Detailed description of the invention
Fig. 1 is flow chart of the invention.
Specific embodiment
With reference to the accompanying drawing, illustrate the specific embodiment of the present embodiment.
Fig. 1 is flow chart of the invention.As shown in Figure 1, a kind of raising GH141 alloy rings grain size homogenization method,
The following steps are included:
Step S1: selection and heating.Selecting material is the bar of GH141 Nickel-Based Steel.Bar is homogenized and is heated；?
The temperature for homogenizing heating is 1100 DEG C.It comes out of the stove after heat preservation, is blank.
Step S2: forging base.Firstly, blank is through upsetter upsetting cake, the height of blank reduces and the cross section of blank increases
Greatly, biscuit is obtained.Then, biscuit is punched out using Ring Rolling Machine, obtains ring billet.Finally using upper anvil and saddle to hollow
Ring billet, the outer wall successively continuous compression along ring billet, thus reaming, while making the enlarged-diameter of blank, the section of blank is by ladder
Tee section becomes rectangular section.
Step S3: it is rolled in advance after heating.Ring billet is rolled in advance after 1080 DEG C of homogenization heat.By ring with roll up and down
Ring is drawn between the top and bottom rolls in different rotary direction and is allowed to generate plastic deformation by the frictional force between roller, is obtained initial
Roll ring.The deflection for initially rolling ring is 20%.
Top and bottom rolls include topping roll and bottom roll, it is preferable that topping roll and bottom roll are cylindrical rigid body.Topping roll and
The diameter of bottom roll is identical, and the revolving speed of topping roll and bottom roll is equal.
Step S3 guarantees that blank bore area comes into full contact with roll and stress is steady, shortens rolling adjustment time, improves
Initially roll the strain rate of loop forming.Strain rate raising can guarantee that initially rolling ring obtains enough activation energies in finish to gauge process
Promote grain nucleation and grow up, complete dynamic recrystallization, obtain uniform structure property, eliminates fine grain band and grain size is missed
Difference.
Step S4: finish to gauge after heating.Ring is initially rolled after 1080 DEG C of homogenization heat, and carries out finish to gauge.By ring and up and down
Frictional force between roll, which draws in ring between the top and bottom rolls in different rotary direction, to be allowed to generate plastic deformation, is obtained final
Roll ring.The most deflection of finish to gauge ring is 20%~25%.
Top and bottom rolls include topping roll and bottom roll, it is preferable that topping roll and bottom roll are cylindrical rigid body.Topping roll and
The diameter of bottom roll is identical, and the revolving speed of topping roll and bottom roll is equal.
Step S5: Physico-chemical tests are carried out after heat treatment.Most finish to gauge ring is heated, heating temperature is 1080 DEG C ± 10 DEG C.So
Rapid heating and quenching afterwards makes the temperature of most finish to gauge ring reach 1120 DEG C ± 10 DEG C, keeps the temperature 0.5h.Make most finish to gauge ring by air-cooled again
Temperature be down to 900 DEG C ± 10 DEG C, keep the temperature 1h~4h.It dissects supersaturated solid solution and carries out Physico-chemical tests, observation most finish to gauge ring
Crystal grain thickness.Difference≤1 grade of the crystal grain thickness of most finish to gauge ring, is judged to detecting qualification.
Embodiment:
Step S1: selection and heating.Selecting material is the bar of GH141 Nickel-Based Steel.Bar is through beveler chamfering.It is right
Bar homogenization heating, homogenization heating temperature are 1100 DEG C.It comes out of the stove after heat preservation, is blank.
Step S2: forging base.Firstly, blank is through upsetter upsetting cake, the height of blank reduces and the cross section of blank increases
Greatly, biscuit is obtained.Then, biscuit is punched out using Ring Rolling Machine, obtains ring billet.Finally using upper anvil and saddle to hollow
Ring billet is handled.Specifically, saddle passes through the center of ring billet, upper anvil along ring billet outer wall successively continuous compression, thus reaming,
While making the enlarged-diameter of blank, the section of blank becomes rectangular section from trapezoid cross section.
Step S3: it is rolled in advance after heating.Ring billet is rolled in advance after 1080 DEG C of homogenization heat.By ring with roll up and down
Ring is drawn between the top and bottom rolls in different rotary direction and is allowed to generate plastic deformation by the frictional force between roller, is obtained initial
Roll ring.The deflection for initially rolling ring is 20%.
Step S4: finish to gauge after heating.Ring is initially rolled after 1080 DEG C of homogenization heat, and carries out finish to gauge.By ring and up and down
Frictional force between roll, which draws in ring between the top and bottom rolls in different rotary direction, to be allowed to generate plastic deformation, is obtained final
Roll ring.The most deflection of finish to gauge ring is 21%.
Step S5: Physico-chemical tests are carried out after heat treatment.Most finish to gauge ring is heated, heating temperature is 1080 DEG C of heating, then
Rapid heating and quenching makes the temperature of most finish to gauge ring reach 1120 DEG C, keeps the temperature 0.5h.It is dropped again by the air-cooled temperature for making most finish to gauge ring
To 900 DEG C, 4h is kept the temperature.It dissects supersaturated solid solution and carries out Physico-chemical tests, observe the crystal grain thickness of most finish to gauge ring.
Testing result, most finish to gauge ring do not find that fine grain band offset distance phenomenon, grain size are 5.0~5.5 grades, the most crystalline substance of finish to gauge ring
The difference of grain thickness is 1 grade.
The present invention reduces heating temperature when forging, improves tissue thinning effect；Increase and roll process in advance, reduces most finish to gauge ring
Deflection makes ring forging inside and outside circle deflection reach unanimity, to make its even tissue, eliminates fine grain band and grain size is missed
Difference.
Above description is explanation of the invention, is not intended to limit the invention, and limited range of the present invention is referring to right
It is required that the present invention can make any type of modification without prejudice to basic structure of the invention.
Claims (5)
1. a kind of raising GH141 alloy rings grain size homogenization method, it is characterised in that the following steps are included:
Step S1: selection and heating；Selecting material is the bar of GH141 Nickel-Based Steel；Bar is homogenized and is heated；Homogenization
Heating temperature is 1100 DEG C；It comes out of the stove after heat preservation, is blank；
Step S2: forging base；Firstly, blank passes through upsetting cake, biscuit is obtained；Then, biscuit is punched out, obtains ring billet；
Last reaming；
Step S3: it is rolled in advance after heating；Ring billet is rolled in advance after 1080 DEG C of homogenization heat, is initially rolled ring；Initially roll ring
Deflection be 20%；
Step S4: finish to gauge after heating；Ring is initially rolled after 1080 DEG C of homogenization heat, and is carried out finish to gauge, is obtained most finish to gauge ring；Finally
The deflection for rolling ring is 20%~25%.
2. raising GH141 alloy rings grain size homogenization method according to claim 1, it is characterised in that: described pre-
It rolls and finish to gauge passes through frictional force between ring and top and bottom rolls, ring is drawn between the top and bottom rolls in different rotary direction
It is allowed to generate plastic deformation.
3. raising GH141 alloy rings grain size homogenization method according to claim 2, it is characterised in that: on described
Bottom roll includes topping roll and bottom roll, for cylindrical rigid body；Topping roll is identical with the diameter of bottom roll；Topping roll and bottom roll
Revolving speed it is equal.
4. raising GH141 alloy rings grain size homogenization method according to claim 1, it is characterised in that: further include
Step S5: Physico-chemical tests are carried out after heat treatment；Most finish to gauge ring is heated, heating temperature is 1080 DEG C ± 10 DEG C；Then quickly add
Thermal quenching makes the temperature of most finish to gauge ring reach 1120 DEG C ± 10 DEG C, keeps the temperature 0.5h；It is dropped again by the air-cooled temperature for making most finish to gauge ring
To 900 DEG C ± 10 DEG C, 1h~4h is kept the temperature；It dissects supersaturated solid solution and carries out Physico-chemical tests, observe the crystal grain thickness of most finish to gauge ring.
5. raising GH141 alloy rings grain size homogenization method according to claim 4, it is characterised in that: in step
In S5, difference≤1 grade of the crystal grain thickness of the most finish to gauge ring is judged to detecting qualification.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910297764.4A CN109967667A (en) | 2019-04-15 | 2019-04-15 | A kind of raising GH141 alloy rings grain size homogenization method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910297764.4A CN109967667A (en) | 2019-04-15 | 2019-04-15 | A kind of raising GH141 alloy rings grain size homogenization method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109967667A true CN109967667A (en) | 2019-07-05 |
Family
ID=67084567
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910297764.4A Pending CN109967667A (en) | 2019-04-15 | 2019-04-15 | A kind of raising GH141 alloy rings grain size homogenization method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109967667A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110976746A (en) * | 2019-12-19 | 2020-04-10 | 陕西宏远航空锻造有限责任公司 | GH141 alloy forging forming method |
| CN111069496A (en) * | 2019-12-30 | 2020-04-28 | 西北工业大学 | Preparation method of GH4738 alloy crystal homogenizing ring forging |
| CN111659846A (en) * | 2020-06-12 | 2020-09-15 | 无锡派克新材料科技股份有限公司 | Forging method for homogenizing GH141 special-shaped ring forging grains |
| CN112122541A (en) * | 2020-08-28 | 2020-12-25 | 豪梅特航空机件(苏州)有限公司 | Method for forming asymmetric complex-section special-shaped ring |
| CN112589020A (en) * | 2020-11-12 | 2021-04-02 | 贵州航宇科技发展股份有限公司 | Waspaloy thin-wall ring forging forming method |
| CN112719181A (en) * | 2020-12-18 | 2021-04-30 | 陕西宏远航空锻造有限责任公司 | Forging method of GH2909 alloy annular piece |
| CN112853079A (en) * | 2020-12-31 | 2021-05-28 | 无锡派克新材料科技股份有限公司 | Large-diameter thin-wall high-cylinder ultrahigh-strength steel D406A ring forging forming method |
| CN112846015A (en) * | 2020-12-24 | 2021-05-28 | 陕西宏远航空锻造有限责任公司 | GH536 high-temperature alloy annular forging forming method |
| CN114309380A (en) * | 2020-09-30 | 2022-04-12 | 贵州安大航空锻造有限责任公司 | Manufacturing method for refining nickel-based superalloy ring crystal grains |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04182080A (en) * | 1990-11-14 | 1992-06-29 | Nkk Corp | Manufacture of rolled clad steel plate of nickel base alloy excellent in base metal toughness |
| CN101279346A (en) * | 2008-04-23 | 2008-10-08 | 贵州安大航空锻造有限责任公司 | Rolling forming method of nickel-based high-temperature alloy special-shaped ring forging |
| CN106563749A (en) * | 2015-10-09 | 2017-04-19 | 北京钢研高纳科技股份有限公司 | Preparation method for controlling organization of GH3230 alloy ring piece to be uniform |
| CN106670359A (en) * | 2016-12-01 | 2017-05-17 | 西北工业大学 | GH4169 alloy ring piece and preparation method thereof |
-
2019
- 2019-04-15 CN CN201910297764.4A patent/CN109967667A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04182080A (en) * | 1990-11-14 | 1992-06-29 | Nkk Corp | Manufacture of rolled clad steel plate of nickel base alloy excellent in base metal toughness |
| CN101279346A (en) * | 2008-04-23 | 2008-10-08 | 贵州安大航空锻造有限责任公司 | Rolling forming method of nickel-based high-temperature alloy special-shaped ring forging |
| CN106563749A (en) * | 2015-10-09 | 2017-04-19 | 北京钢研高纳科技股份有限公司 | Preparation method for controlling organization of GH3230 alloy ring piece to be uniform |
| CN106670359A (en) * | 2016-12-01 | 2017-05-17 | 西北工业大学 | GH4169 alloy ring piece and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 梁艳等: "GH141高温合金的热加工工艺", 《金属热处理》 * |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110976746A (en) * | 2019-12-19 | 2020-04-10 | 陕西宏远航空锻造有限责任公司 | GH141 alloy forging forming method |
| CN110976746B (en) * | 2019-12-19 | 2021-10-15 | 陕西宏远航空锻造有限责任公司 | GH141 alloy forging forming method |
| CN111069496B (en) * | 2019-12-30 | 2021-06-01 | 西北工业大学 | Preparation method of GH4738 alloy crystal homogenizing ring forging |
| CN111069496A (en) * | 2019-12-30 | 2020-04-28 | 西北工业大学 | Preparation method of GH4738 alloy crystal homogenizing ring forging |
| CN111659846A (en) * | 2020-06-12 | 2020-09-15 | 无锡派克新材料科技股份有限公司 | Forging method for homogenizing GH141 special-shaped ring forging grains |
| CN112122541A (en) * | 2020-08-28 | 2020-12-25 | 豪梅特航空机件(苏州)有限公司 | Method for forming asymmetric complex-section special-shaped ring |
| CN114309380A (en) * | 2020-09-30 | 2022-04-12 | 贵州安大航空锻造有限责任公司 | Manufacturing method for refining nickel-based superalloy ring crystal grains |
| CN112589020A (en) * | 2020-11-12 | 2021-04-02 | 贵州航宇科技发展股份有限公司 | Waspaloy thin-wall ring forging forming method |
| CN112719181A (en) * | 2020-12-18 | 2021-04-30 | 陕西宏远航空锻造有限责任公司 | Forging method of GH2909 alloy annular piece |
| CN112719181B (en) * | 2020-12-18 | 2023-01-13 | 陕西宏远航空锻造有限责任公司 | Forging method of GH2909 alloy annular piece |
| CN112846015A (en) * | 2020-12-24 | 2021-05-28 | 陕西宏远航空锻造有限责任公司 | GH536 high-temperature alloy annular forging forming method |
| CN112853079A (en) * | 2020-12-31 | 2021-05-28 | 无锡派克新材料科技股份有限公司 | Large-diameter thin-wall high-cylinder ultrahigh-strength steel D406A ring forging forming method |
| CN112853079B (en) * | 2020-12-31 | 2024-02-13 | 无锡派克新材料科技股份有限公司 | Forming method of large-diameter thin-wall high-cylinder type ultra-high strength steel D406A ring forging |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109967667A (en) | A kind of raising GH141 alloy rings grain size homogenization method | |
| US11525652B2 (en) | Preparation method of uniform low stress cone shaped charge liner | |
| EP2977124B1 (en) | Material for ring rolling | |
| CN101279346B (en) | Method for rolling and shaping nickel-based high-temperature alloy special-shaped ring forging | |
| CN103465027B (en) | The thin brilliant dish base manufacture method of a kind of GH4169 alloy | |
| CN107138538A (en) | Forging method for refining grain size of high-temperature alloy annular forging | |
| CN104175068B (en) | Forging method of special-shaped ring made of aviation alloy material | |
| CN106868436A (en) | A kind of fast footpath forging Joint Production GH4169 alloy fine grain bar manufacture method | |
| CN104388860B (en) | A kind of nickel base superalloy finish forge cogging method | |
| CN109248980A (en) | The manufacturing method of GH4169 alloy bar material | |
| CN103480784A (en) | Method for manufacturing drum forging for centrifugal machine | |
| CN103691853B (en) | The roll forming of nickel base superalloy straight-flanked ring base is the method for special-shaped thin wall ring | |
| CN103691854B (en) | The roll forming of cobalt base superalloy straight-flanked ring base is the method for special-shaped thin wall ring | |
| CN103143658A (en) | Rolling forming method for bearing steel complex abnormal section annular element | |
| CN104148550B (en) | The roll forming of iron-base superalloy straight-flanked ring base is the method for special-shaped thin wall ring | |
| KR101330641B1 (en) | A Manufacturing method for profiled ring of Ni-base superalloy for obtaining a uniform microstructure | |
| CN109811117A (en) | A kind of high temperature alloy crystal grain ultrasonic wave water logging homogenization method | |
| CN114309383B (en) | Forging process method of fine-grain 18-8 type stainless steel thick-wall ring forging | |
| CN105397417A (en) | Rolling method of high-temperature alloy plate shaped forging | |
| CN108856615A (en) | Heavy Pan Forgings roll stone roller manufacturing process | |
| CN202181323U (en) | Cooling control device after hot-rolling and punching of GCr15 bearing steel tube blank | |
| CN111793763A (en) | Preparation method of ultrahigh-strength and plastic 304 stainless steel | |
| CN104099547A (en) | Superplastic forming method of complex section ring part of TC11 titanium alloy | |
| CN114226619B (en) | Construction method of forging process window of large shaft forging | |
| RU2349410C2 (en) | Method of solid-rolled rings producing made of heat-resistant nickel alloys |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190705 |
|
| RJ01 | Rejection of invention patent application after publication |