CN107904491A - High abrasion brake rim hot continuous rolling alloy-steel plate and its production method - Google Patents
High abrasion brake rim hot continuous rolling alloy-steel plate and its production method Download PDFInfo
- Publication number
- CN107904491A CN107904491A CN201711181471.7A CN201711181471A CN107904491A CN 107904491 A CN107904491 A CN 107904491A CN 201711181471 A CN201711181471 A CN 201711181471A CN 107904491 A CN107904491 A CN 107904491A
- Authority
- CN
- China
- Prior art keywords
- steel plate
- brake rim
- hot continuous
- high abrasion
- continuous rolling
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- 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
- C21D1/18—Hardening; Quenching with or without subsequent tempering
- C21D1/25—Hardening, combined with annealing between 300 degrees Celsius and 600 degrees Celsius, i.e. heat refining ("Vergüten")
-
- 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
-
- 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
Abstract
The invention belongs to metal material field, and in particular to a kind of high abrasion brake rim hot continuous rolling alloy-steel plate and its production method.For the problems such as existing brake rim strength of materials and wearability are bad, production cost is high, the present invention provides a kind of high abrasion brake rim hot continuous rolling alloy-steel plate and its production method, and steel plate composition is：By weight percentage, C：0.30~0.40%, Si：0.20~0.35%, Mn：0.70~0.95%, Cr：0.90~1.05%, P：≤ 0.020%, S：≤ 0.010%, Mo：0.25~0.35%, Ni：0.08~0.15%, Ti：≤ 0.015%, remaining is Fe and inevitable impurity.Heating-up temperature and rolling temperature are strictly controlled during production, the sparse cooling of laminar flow is used after finish rolling, the steel plate being prepared has the advantages that mechanical property is good, and wearability is high, can be used in brake rim, economic benefit is obvious.
Description
Technical field
The invention belongs to metal material field, and in particular to a kind of high abrasion brake rim hot continuous rolling alloy-steel plate and its life
Production method.
Background technology
At present, the big truck of domestic demands brake force, bus, are still roused using drum brakes in front and back wheel, most of to use
Pearlite gray cast iron material, outer surface are mostly smooth structure, and the circumferential outer surface of small part product only has some longitudinal directions
The rib parallel with brake drum axis, and brake rim takes very big market ratio.Using the brake drum deficiency of these structures
Be in：1. easily cause to break off the base because material is unqualified；Tensile strength is too low；Easily cause cracking and tortoise because of thermal shock
Split.2. brake drum radiates not in time, heat passes to rapidly rubber tyre, causes tire pressure to raise, and the danger of tyre break is big
Big increase, so as to reduce braking safety and reliability.In order to overcome drawbacks described above, the performance of brake rim material is proposed
The requirement of higher.
The material of production brake rim mainly has ferrite cast iron, Lanzcast iron etc. at present.Ferrite cast iron is in heavily loaded work
Intensity and wearability deficiency when being used under condition, yielding, when machining, glues knife, poor surface smoothness；Lanzcast iron generally needs
Add the alloying element such as Cr, Cu, Ce and coordinate and be heat-treated and top layer quenching treatment again, production cost is higher, its thermal conductivity
Less than ferrite cast iron.
The content of the invention
The technical problem to be solved in the present invention is：Existing the brake rim strength of materials and wearability are bad, production cost is high
The problems such as.
The present invention solve above-mentioned technical problem technical solution be：A kind of high abrasion brake rim hot continuous rolling steel alloy is provided
Plate and its production method.
The present invention provides a kind of high abrasion brake rim hot continuous rolling alloy-steel plate, its constituent is：Percentage by weight
Than meter, C：0.30~0.40%, Si：0.20~0.35%, Mn：0.70~0.95%, Cr：0.90~1.05%, P：≤
0.020%, S：≤ 0.010%, Mo：0.25~0.35%, Ni：0.08~0.15%, Ti：≤ 0.015%, remaining is for Fe and not
Evitable impurity.
Preferably, above-mentioned high abrasion brake rim hot continuous rolling alloy-steel plate, its constituent are：By weight percentage,
C：0.31~0.38%, Si：0.22~0.30%, Mn：0.75~0.80%, Cr：0.95~1.02%, P：≤ 0.018%, S：
≤ 0.010%, Mo：0.28~0.31%, Ni：0.10~0.15%, Ti：0.008~0.015%, remaining is Fe and can not keep away
The impurity exempted from.
Present invention also offers a kind of production method of above-mentioned high abrasion brake rim hot continuous rolling alloy-steel plate, including it is following
Step：Desulfurizing iron-converter smelting top-bottom blowing-dephosphorization, deoxidation, alloying-chain-wales Argon-LF electrical heating, secondary alloy
Change-RH application of vacuum-hello calcium line-continuous casting-heating of plate blank-high-pressure water descaling-roughing-Coil Box batches-finish rolling-section cooling-
Batch-packaging and storage；The slab heating temperature is 1180~1230 DEG C.
Wherein, in production method of the above-mentioned high abrasion brake rim with hot continuous rolling alloy-steel plate, the roughing using 5 passages or
7 passes, every time deflection >=20%.
Wherein, in production method of the above-mentioned high abrasion brake rim with hot continuous rolling alloy-steel plate, during the roughing among base it is thick
Spend for more than 4 times of finished product thickness.
Wherein, in production method of the above-mentioned high abrasion brake rim with hot continuous rolling alloy-steel plate, the entry temperature at finishing is
970~1020 DEG C, finish rolling finishing temperature is 830~880 DEG C.
Wherein, it is sparse using laminar flow after finish rolling in production method of the above-mentioned high abrasion brake rim with hot continuous rolling alloy-steel plate
The type of cooling is cooled down.
Beneficial effects of the present invention are：
The present invention is by controlling the chemical composition of steel in optimal level, using distinctive rolling mill practice, in the operation of rolling
In accurate control workpiece thickness, to ensure that the austenite recrystallization of roughing deformation process is complete, and adjusted using after stamping
The new process of matter processing makes, and quenches+600 DEG C of high temperings by 900 DEG C, the brake drum quality being prepared is small, mechanicalness
Can be high, also with good thermal diffusivity, thermal fatigue resistance, wearability, structural homogenity and shock absorption.Given birth to using the method for the present invention
The high-wearing feature brake rim of production 400~560MPa of yield strength of hot continuous rolling alloy coil of strip, 610~720MPa of tensile strength,
Meanwhile yield strength 950MPa~1100MPa after punching press flanging forming rear braking brake drum modifier treatment, tensile strength 1050
~1200MPa, elongation percentage A >=14%, quenching hardness are generally HB380~500.At 650 DEG C, test overall strain Δ ε is
0.25%th, under the conditions of circulating 30 times/min of the frequency, high temperature low-cycle fatigue life performance >=1500 time, are suitable for use as brake rim use,
With important economic benefit.
Embodiment
The present invention provides a kind of high abrasion brake rim hot continuous rolling alloy-steel plate, its constituent is：Percentage by weight
Than meter, C：0.30~0.40%, Si：0.20~0.35%, Mn：0.70~0.95%, Cr：0.90~1.05%, P：≤
0.020%, S：≤ 0.010%, Mo：0.25~0.35%, Ni：0.08~0.15%, Ti：≤ 0.015%., remaining for Fe and
Inevitable impurity.
Preferably, above-mentioned high abrasion brake rim hot continuous rolling alloy-steel plate, its constituent are：By weight percentage,
C：0.31~0.38%, Si：0.22~0.30%, Mn：0.75~0.80%, Cr：0.95~1.02%, P：≤ 0.018%, S：
≤ 0.010%, Mo：0.28~0.31%, Ni：0.10~0.15%, Ti：0.008~0.015%, remaining is Fe and can not keep away
The impurity exempted from.
In steel plate of the present invention, tri- kinds of alloying components of Mo, Ni and Ti are particularly added, alloy species are more, alloy-steel plate
Intensity higher, the hot continuous rolling alloy-steel plate yield strength and tensile strength of mentioned component are high, and elongation percentage is high, the high temperature low-cycle fatigue longevity
Performance >=1500 time are ordered, there is higher wearability, be suitably used as high abrasion brake rim.
Present invention also offers a kind of production method of above-mentioned high abrasion brake rim hot continuous rolling alloy-steel plate, including it is following
Step：Desulfurizing iron-converter smelting top-bottom blowing-dephosphorization, deoxidation, alloying-chain-wales Argon-LF electrical heating, secondary alloy
Change-RH application of vacuum-hello calcium line-continuous casting-heating of plate blank-high-pressure water descaling-roughing-Coil Box batches-finish rolling-section cooling-
Batch-packaging and storage.
Wherein, in production method of the above-mentioned high abrasion brake rim with hot continuous rolling alloy-steel plate, the slab heating temperature
For 1180~1230 DEG C.Slab obtained by continuous casting is heated to 1180~1230 DEG C of insulation roughing, according to the difference of finished product thickness,
The slab of 200~250mm thickness passes through 5 passages or 7 passage roughing, and every time deflection is necessary >=and 20%, ensure that austenite is tied again
Crystalline substance, fining austenite grains.Different according to finished product thickness, workpiece thickness is different, but workpiece thickness must be in finished product thickness
More than 4 times.
Steel billet after roughing then carries out Coil Box and batches, and the Coil Box is the steel-making common Coil Box of industry,
Such as mandrelless transform Coil Box.Base exchanges end to end among being realized in the Coil Box, to ensure that the elongated temperature of steel billet is uniform；
Secondary oxidation iron sheet is removed to ensure that steel billet plate face is bright and clean at the same time.
Middle base carries out displacement uncoiling after being batched through Coil Box, and finish rolling, entry temperature at finishing are carried out into finish rolling area
For 970~1020 DEG C, finish rolling finishing temperature is 830~880 DEG C, is cooled down after finish rolling using the sparse type of cooling of laminar flow.
The equipment that the present invention uses connects for steel-making industry common device, including common mammoth conveter (>=220t), sheet slab
Casting machine 250*1950mm types casting machine, common wide steel hot tandem (walking beam heating furnace, reversing rougher, finishing tandem rolling
Unit, coiling machine), traditional 2050 hot continuous rolling production line of strip etc..
Explanation will be further explained to the embodiment of the present invention by embodiment below, but do not indicated that this
The protection domain of invention is limited in described in embodiment in scope.
Embodiment 1~3 prepares high-wearing feature brake rim hot continuous rolling alloy-steel plate using the method for the present invention
Using chemical composition steel production roll of steel plate as shown in Table 1, specific operating process is：Desulfurizing iron-converter smelting
Refine top-bottom blowing-dephosphorization, deoxidation, alloying-chain-wales Argon-LF electrical heating, secondary alloyed-RH application of vacuum-feed calcium line-
Continuous casting-heating of plate blank-high-pressure water descaling-roughing-Coil Box batches-finish rolling-section cooling-and batches-packaging and storage.
The chemical composition of 1 embodiment of table
| Embodiment | C | Si | Mn | Cr | P | S | Mo | Ni | Ti |
| 1 | 0.32 | 0.21 | 0.75 | 0.94 | 0.016 | 0.006 | 0.28 | 0.11 | 0.013 |
| 2 | 0.32 | 0.21 | 0.78 | 0.97 | 0.015 | 0.007 | 0.31 | 0.12 | 0.013 |
| 3 | 0.36 | 0.24 | 0.81 | 1.02 | 0.014 | 0.007 | 0.31 | 0.14 | 0.014 |
| Comparative example 1 | 0.33 | 0.21 | 0.57 | 1.01 | 0.015 | 0.007 | 0.26 | 0.12 | 0.011 |
| Comparative example 2 | 0.33 | 0.22 | 0.58 | 1.03 | 0.016 | 0.008 | 0.27 | 0.13 | 0.013 |
Wherein, the rolling thickness of roll of steel plate, heating-up temperature, thickness, start rolling temperature and the finishing temperature such as institute of table 2 of middle base
Show.Roughing uses five passage de-scalings during rolling, ensures dephosphorization water pressure >=22MPa, ensures scale removal effect.Workpiece thickness presses table
3 controls.
Finish rolling：Mm finishing mill unit >=4 rack cooling water is opened, and puts into middle pressure de-scaling water between F1 racks.
The hot rolling technology controlling value of 2 embodiment of table
The control of 3 workpiece thickness of table requires
| Finished product thickness/mm | Workpiece thickness/mm | Remarks |
| 4.0~7.0 | 42±1 | Put into hot rolling box function |
| 7.0~8.0 | 44±1 | Put into hot rolling box function |
| 8.0~14.0 | 46~50 | —— |
| 14.0~18.0 | 52±1 | —— |
Comparative example 1~2 does not use the method for the present invention hot continuous rolling alloy-steel plate
In comparative example, prepare that the constituent of steel plate is as shown in table 1, the parameter of hot rolling technology is as shown in table 2, remaining step
Same embodiment.
The roll of steel plate produced to embodiment 1~3, comparative example 1~2 carries out performance measurement, and the assay method of mechanical property is adopted
Carried out with the method for GB/T228, GB/T 232, the assay method of high temperature low-cycle fatigue life performance is：At 650 DEG C, test
The fatigue life that overall strain Δ ε is 0.25%, is obtained under the conditions of 30 times/min of the circulation frequency.Performance measurement result is as shown in table 4.
Mechanical property after 4 embodiment coil of strip (plate) of table is quenched
From embodiment and the result of comparative example：Using the method for the present invention, brake rim hot continuous rolling can be significantly improved
The intensity level of alloy-steel plate and low fatigue behaviour.
Claims (7)
1. high abrasion brake rim hot continuous rolling alloy-steel plate, it is characterised in that constituent is：By weight percentage, C：
0.30~0.40%, Si：0.20~0.35%, Mn：0.70~0.95%, Cr：0.90~1.05%, P：≤ 0.020%, S：≤
0.010%, Mo：0.25~0.35%, Ni：0.08~0.15%, Ti：≤ 0.015%, remaining for Fe and inevitably it is miscellaneous
Matter.
2. high abrasion brake rim hot continuous rolling alloy-steel plate according to claim 1, it is characterised in that constituent is：
By weight percentage, C：0.31~0.38%, Si：0.22~0.30%, Mn：0.75~0.80%, Cr：0.95~
1.02%, P：≤ 0.018%, S：≤ 0.010%, Mo：0.28~0.31%, Ni：0.10~0.15%, Ti：0.008~
0.015%, remaining is Fe and inevitable impurity.
3. the production method of the high abrasion brake rim hot continuous rolling alloy-steel plate described in claim 1 or 2, it is characterised in that bag
Include following steps：Desulfurizing iron-converter smelting top-bottom blowing-dephosphorization, deoxidation, alloying-chain-wales Argon-LF electrical heating, two
Secondary alloying-RH application of vacuum-hello calcium line-continuous casting-heating of plate blank-high-pressure water descaling-roughing-Coil Box batches-finish rolling-laminar flow
Cool down-batch-packaging and storage；The slab heating temperature is 1180~1230 DEG C.
4. the production method of high abrasion brake rim hot continuous rolling alloy-steel plate according to claim 3, it is characterised in that：Institute
State roughing and use 5 passages or 7 passes, every time deflection >=20%.
5. the production method of high abrasion brake rim hot continuous rolling alloy-steel plate according to claim 3, it is characterised in that：Institute
Workpiece thickness is more than 4 times of finished product thickness when stating roughing.
6. the production method of high abrasion brake rim hot continuous rolling alloy-steel plate according to claim 3, it is characterised in that：Institute
Entry temperature at finishing is stated as 970~1020 DEG C, finish rolling finishing temperature is 830~880 DEG C.
7. the production method of high abrasion brake rim hot continuous rolling alloy-steel plate according to claim 3, it is characterised in that：Essence
Cooled down after rolling using the sparse type of cooling of laminar flow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711181471.7A CN107904491A (en) | 2017-11-23 | 2017-11-23 | High abrasion brake rim hot continuous rolling alloy-steel plate and its production method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711181471.7A CN107904491A (en) | 2017-11-23 | 2017-11-23 | High abrasion brake rim hot continuous rolling alloy-steel plate and its production method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107904491A true CN107904491A (en) | 2018-04-13 |
Family
ID=61847446
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711181471.7A Pending CN107904491A (en) | 2017-11-23 | 2017-11-23 | High abrasion brake rim hot continuous rolling alloy-steel plate and its production method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107904491A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109236899A (en) * | 2018-10-29 | 2019-01-18 | 温州市钢泰冲压件有限公司 | A kind of high-strength brake block steel back and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103194688A (en) * | 2013-03-28 | 2013-07-10 | 宝山钢铁股份有限公司 | Wear-resistant steel pipe and manufacture method thereof |
-
2017
- 2017-11-23 CN CN201711181471.7A patent/CN107904491A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103194688A (en) * | 2013-03-28 | 2013-07-10 | 宝山钢铁股份有限公司 | Wear-resistant steel pipe and manufacture method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109236899A (en) * | 2018-10-29 | 2019-01-18 | 温州市钢泰冲压件有限公司 | A kind of high-strength brake block steel back and preparation method thereof |
| CN109236899B (en) * | 2018-10-29 | 2020-05-08 | 温州市钢泰冲压件有限公司 | High-strength brake pad steel backing and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107043888B (en) | A kind of 980MPa that cold-bending property is excellent grade dual-phase steel plate and preparation method thereof | |
| CN104946969B (en) | Hot-rolled pickled steel plate for air conditioner compressor housings and manufacturing method thereof | |
| KR101476866B1 (en) | Low density steel with good stamping capability | |
| CN102581008A (en) | Processing method for producing low-cost high-formability IF (interstitial-free) steel | |
| CN104480391B (en) | A kind of hot rolling acid-cleaning plate and production method thereof | |
| CN109182923B (en) | Heat treatment method of low-carbon microalloyed cold-rolled TRIP980 steel with high product of strength and elongation | |
| CN105349884B (en) | The enamelled strip of hot rolling acid-cleaning containing Ti and its production method | |
| CN105734403B (en) | A kind of steel saw blade hot-rolled coil and its production method | |
| CN101147920A (en) | Hot rolled steel plate surface oxidation iron sheet control method for vanadium-containing automobile beam | |
| CN108441759B (en) | A kind of 540MPa grades of hot rolling acid-cleaning steel plate and its manufacturing method | |
| CN104745935A (en) | Production method for cold-rolled steel sheet with excellent stamping property | |
| CN102719735A (en) | Ultrafine-grain hot-rolling dual phase steel plate for automobile and production method thereof | |
| CN107604256A (en) | A kind of preparation method of 700MPa levels automotive frame steel band | |
| CN108411202A (en) | A kind of think gauge cold-rolled biphase steel and preparation method thereof | |
| CN105112775B (en) | A kind of high formability hot continuous-milling steel plate and its production method | |
| CN101767106B (en) | Hot rolling process of stainless plate strip coil | |
| CN105256225B (en) | Elevator cold-rolled steel sheet and preparation method thereof | |
| CN109722599A (en) | A kind of tensile strength 750MPa grades of think gauge automotive frame steel plates and preparation method thereof | |
| CN102260828B (en) | Metallic material and method for forming same | |
| CN103436789A (en) | Hot roll for rolling aluminium products and manufacturing method thereof | |
| CN107974635A (en) | Antifatigue high abrasion brake rim hot continuous rolling alloy-steel plate and its production method | |
| CN107904491A (en) | High abrasion brake rim hot continuous rolling alloy-steel plate and its production method | |
| CN113061809A (en) | 380 MPa-level hot rolled steel strip for 2-4mm automobile structure and production method thereof | |
| CN107829033B (en) | High abrasion containing V brake rim hot continuous rolling alloy-steel plate and its production method | |
| CN106811692B (en) | A kind of quenching high-strength easily molded cold-rolled steel sheet and its manufacturing method |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180413 |