CN114672722A - 一种船板用钢板及其生产方法 - Google Patents
一种船板用钢板及其生产方法 Download PDFInfo
- Publication number
- CN114672722A CN114672722A CN202210099183.1A CN202210099183A CN114672722A CN 114672722 A CN114672722 A CN 114672722A CN 202210099183 A CN202210099183 A CN 202210099183A CN 114672722 A CN114672722 A CN 114672722A
- Authority
- CN
- China
- Prior art keywords
- steel plate
- ship
- plate
- less
- producing
- 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
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 44
- 239000010959 steel Substances 0.000 title claims abstract description 44
- 238000004519 manufacturing process Methods 0.000 title claims description 15
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 7
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 7
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 5
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 5
- 239000000126 substance Substances 0.000 claims abstract description 5
- 239000012535 impurity Substances 0.000 claims abstract description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 3
- 238000005096 rolling process Methods 0.000 claims description 24
- 238000001816 cooling Methods 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 12
- 230000008569 process Effects 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 7
- 239000000498 cooling water Substances 0.000 claims description 6
- 238000002791 soaking Methods 0.000 claims description 4
- 230000009467 reduction Effects 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 229910052750 molybdenum Inorganic materials 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 239000007921 spray Substances 0.000 claims description 2
- 238000004321 preservation Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000009749 continuous casting Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910001563 bainite Inorganic materials 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 229910001562 pearlite Inorganic materials 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Images
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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
- B21B1/463—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/58—Roll-force control; Roll-gap control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
-
- 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
- C21D11/00—Process control or regulation for heat treatments
- C21D11/005—Process control or regulation for heat treatments for cooling
-
- 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
- C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
-
- 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
- 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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- 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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- 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
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/002—Bainite
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/005—Ferrite
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/009—Pearlite
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
一种船板用钢板,所述钢板化学成分及其质量百分含量为:C:0.06~0.18%、Si:0.15~0.50%、Mn:0.90~1.60%、P≤0.020%、S≤0.010%、Nb:0.02~0.05%、V:0.02~0.05%、Ti:0.01~0.02%、Als:0.02~0.06%,其余为Fe及不可避免的杂质元素,且碳当量Ceq≤0.42%,其中Ceq=C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15。钢板抗拉强度:530MPa‑600MPa;屈服强度:≥440MPa;延伸率:≥22%;‑40℃冲击韧性:≥120J,CTOD特征值:≥0.6mm。
Description
技术领域
本发明属于钢板生产技术领域,具体涉及一种船板用钢板及其生产方法。
背景技术
船板钢要求其具有高强度、抗层状撕裂、大热输入焊接、耐腐蚀、超低温韧性、高止裂性能。目前的冶金技术,能够精确控制钢中合金元素含量,降低钢中夹杂物水平及杂质元素含量,提高钢水纯净度,有利于获得较高韧性的焊接性;控轧控冷技术的发展,能够精确控制钢中组织相变及析出物析出的形貌及时机,提高钢材的强度水平。
发明内容
本发明解决的技术问题是,提供一种船板用钢板及其生产方法,钢板具有高止裂韧性、高强度。
为解决以上技术问题,本发明的技术方案是:一种船板用钢板,所述钢板化学成分及其质量百分含量为:C:0.06~0.18%、Si:0.15~0.50%、Mn:0.90~1.60%、P≤0.020%、S≤0.010%、Nb:0.02~0.05%、V:0.02~0.05%、Ti:0.01~0.02%、Als:0.02~0.06%,其余为Fe及不可避免的杂质元素,且碳当量Ceq≤0.42%,其中Ceq与钢中C、Mn、Cr、Mo、V、Ni、Cu元素的质量百分含量满足:Ceq=C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15。
优选的,C:0.09~0.13%、Si:0.27~0.35%、Mn:1.35~1.50%、Nb:0.031~0.037%、V:0.029~0.034%、Ti:0.014~0.018%、Als:0.026~0.038%。
上述一种船板用钢板的生产方法,钢板生产工艺流程为:中厚板坯连铸→加热炉加热保温→除鳞→粗轧→即时冷却→精轧→超快冷,其特征在于,所述超快冷工序,返红温度控制在610~630℃。
进一步的,所述加热炉加热保温工序,板坯均热温度1220-1250℃,出炉温度1170-1200℃,均热时间≥40min。
进一步的,所述粗轧工序,粗轧开轧温度范围1020-1050℃。
进一步的,所述即时冷却工序,冷却装置对钢板进行水冷,使得轧件心部和表面温差为197~288℃。
进一步的,所述即时冷却工序,即时冷却装置宽度为6~7m,冷却水量900~1000L/min,开启6~10组冷却水喷淋装置。
进一步的,所述精轧工序,精轧开轧温度<880℃,终轧温度控制在800~830℃,精轧阶段压下率≥60%。
进一步的,所述钢板的厚度规格为8-50mm。
采用上述技术方案所产生的有益效果在于:
本发明钢板化学成分通过合理的微合金化,生产方法通过控制轧制参数设计,获得的钢板具有400MPa的强度,具有高止裂韧性,且兼具优良焊接性能。
附图说明
图1是产品厚度规格为30mm的钢板厚度方向1/4位置的金相组织照片;
图2是产品厚度规格为30mm的钢板厚度方向1/2位置的金相组织照片。
具体实施方式
为了使本发明的目的、技术方案及优点更加清楚明白,以下结合实施例,对本发明进行进一步详细说明。应当理解,此处所描述的具体实施例仅仅用以解释本发明,并不用于限定本发明。
实施例1-7
一种船板用钢板,化学成分见表1,钢板生产工艺流程为:中厚板坯连铸→加热炉加热保温→除鳞→粗轧→即时冷却→精轧→超快冷。连铸工序获得厚度280mm的中厚板坯。加热炉加热保温工序,板坯均热温度、出炉温度、均热时间见表2。粗轧工序,粗轧开轧温度见表2。即时冷却工序,即时冷却装置宽度、冷却水量、冷却水喷淋装置开启数量见表3,冷却装置对钢板进行水冷后,轧件心部和表面温差见表3。精轧工序,精轧开轧温度、终轧温度、精轧阶段压下率见表3。超快冷工序,返红温度见表3。所获得的钢板的厚度规格见表2。
表1
表2
表3
实施例1-7获得的钢板金相组织为铁素体组织+珠光体组织+贝氏体组织,用于制造船体外壳,对实施例1-7钢板性能进行检测,钢板抗拉强度:530MPa-600MPa;屈服强度:≥440MPa;延伸率:≥22%;-40℃冲击韧性:≥120J,CTOD特征值:≥0.6mm。
以上实施例仅用以说明而非限制本发明的技术方案,尽管参照上述实施例对本发明进行了详细说明,本领域的普通技术人员应当理解:依然可以对本发明进行修改或者等同替换,而不脱离本发明的精神和范围的任何修改或局部替换,其均应涵盖在本发明的权利要求范围当中。
Claims (9)
1.一种船板用钢板,其特征在于,所述钢板化学成分及其质量百分含量为:C:0.06~0.18%、Si:0.15~0.50%、Mn:0.90~1.60%、P≤0.020%、S≤0.010%、Nb:0.02~0.05%、V:0.02~0.05%、Ti:0.01~0.02%、Als:0.02~0.06%,其余为Fe及不可避免的杂质元素,且碳当量Ceq≤0.42%,其中Ceq与钢中C、Mn、Cr、Mo、V、Ni、Cu元素的质量百分含量满足:Ceq=C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15。
2.根据权利要求1所述的一种船板用钢板,其特征在于,C:0.09~0.13%、Si:0.27~0.35%、Mn:1.35~1.50%、Nb:0.031~0.037%、V:0.029~0.034%、Ti:0.014~0.018%、Als:0.026~0.038%。
3.根据权利要求1、2所述的一种船板用钢板的生产方法,钢板生产工艺流程为:中厚板坯连铸→加热炉加热保温→除鳞→粗轧→即时冷却→精轧→超快冷,其特征在于,所述超快冷工序,返红温度控制在610~630℃。
4.根据权利要求3所述的一种船板用钢板的生产方法,其特征在于,所述加热炉加热保温工序,板坯均热温度1220-1250℃,出炉温度1170-1200℃,均热时间≥40min。
5.根据权利要求3所述的一种船板用钢板的生产方法,其特征在于,所述粗轧工序,粗轧开轧温度范围1020-1050℃。
6.根据权利要求3所述的一种船板用钢板的生产方法,其特征在于,所述即时冷却工序,冷却装置对钢板进行水冷,使得轧件心部和表面温差为197~288℃。
7.根据权利要求6所述的一种船板用钢板的生产方法,其特征在于,所述即时冷却工序,即时冷却装置宽度为6~7m,冷却水量900~1000L/min,开启6~10组冷却水喷淋装置。
8.根据权利要求3所述的一种船板用钢板的生产方法,其特征在于,所述精轧工序,精轧开轧温度<880℃,终轧温度控制在800~830℃,精轧阶段压下率≥60%。
9.根据权利要求3-8任一项所述的一种船板用钢板的生产方法,其特征在于,所述钢板的厚度规格为8-50mm。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202210099183.1A CN114672722A (zh) | 2022-01-27 | 2022-01-27 | 一种船板用钢板及其生产方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202210099183.1A CN114672722A (zh) | 2022-01-27 | 2022-01-27 | 一种船板用钢板及其生产方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
CN114672722A true CN114672722A (zh) | 2022-06-28 |
Family
ID=82071642
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202210099183.1A Pending CN114672722A (zh) | 2022-01-27 | 2022-01-27 | 一种船板用钢板及其生产方法 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN114672722A (zh) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102286701A (zh) * | 2011-05-12 | 2011-12-21 | 南京钢铁股份有限公司 | 一种超高强度船体结构用厚板及其生产方法 |
CN103958715A (zh) * | 2012-04-06 | 2014-07-30 | 新日铁住金株式会社 | 止裂性优异的高强度厚钢板 |
CN107012395A (zh) * | 2017-03-02 | 2017-08-04 | 唐山钢铁集团有限责任公司 | 一种粗轧阶段提高低合金特厚板心部质量的方法 |
WO2020113951A1 (zh) * | 2018-12-05 | 2020-06-11 | 南京钢铁股份有限公司 | 一种tmcp态船舶voc储罐用低温钢板及制造方法 |
CN112553532A (zh) * | 2020-12-04 | 2021-03-26 | 山东钢铁集团日照有限公司 | 一种高韧性减量化船板海工钢及其制备方法 |
CN114645191A (zh) * | 2022-02-11 | 2022-06-21 | 柳州钢铁股份有限公司 | 低成本高韧性高焊接性高强船板及其制备方法 |
-
2022
- 2022-01-27 CN CN202210099183.1A patent/CN114672722A/zh active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102286701A (zh) * | 2011-05-12 | 2011-12-21 | 南京钢铁股份有限公司 | 一种超高强度船体结构用厚板及其生产方法 |
CN103958715A (zh) * | 2012-04-06 | 2014-07-30 | 新日铁住金株式会社 | 止裂性优异的高强度厚钢板 |
CN107012395A (zh) * | 2017-03-02 | 2017-08-04 | 唐山钢铁集团有限责任公司 | 一种粗轧阶段提高低合金特厚板心部质量的方法 |
WO2020113951A1 (zh) * | 2018-12-05 | 2020-06-11 | 南京钢铁股份有限公司 | 一种tmcp态船舶voc储罐用低温钢板及制造方法 |
CN112553532A (zh) * | 2020-12-04 | 2021-03-26 | 山东钢铁集团日照有限公司 | 一种高韧性减量化船板海工钢及其制备方法 |
CN114645191A (zh) * | 2022-02-11 | 2022-06-21 | 柳州钢铁股份有限公司 | 低成本高韧性高焊接性高强船板及其制备方法 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2020169075A1 (zh) | 一种高强度耐候钢薄带及其生产方法 | |
CN109136738B (zh) | 一种高强度耐低温船体结构钢板及其制备方法 | |
CN110295320B (zh) | 一种lf-rh精炼工艺生产的大壁厚x52ms抗酸管线钢板及其制造方法 | |
JP7457843B2 (ja) | 極地海洋工事用鋼板及びその製造方法 | |
CN111378896B (zh) | 一种高强度耐候型建筑桥梁用钢板及其制造方法 | |
CN111441000A (zh) | 一种屈服强度690MPa级低屈强比高强钢板及其制造方法 | |
CN109536846B (zh) | 屈服强度700MPa级高韧性热轧钢板及其制造方法 | |
CN102618790B (zh) | 一种高强度低铬铁素体不锈钢及其制造方法 | |
CN110735085A (zh) | 一种薄规格Q345qE、Q370qE钢板的制造方法 | |
CN103215524A (zh) | 一种具有优良管加工性的不锈钢焊管及其制造方法 | |
CN109536847B (zh) | 屈服强度390MPa级焊管用热轧钢板及其制造方法 | |
WO2013044641A1 (zh) | 一种屈服强度700MPa级高强度高韧性钢板及其制造方法 | |
CN103695807A (zh) | 止裂性优良的超高强x100管线钢板及其制备方法 | |
CN114525452B (zh) | 屈服强度700Mpa级热镀锌低合金高强钢及制备方法 | |
CN113751679B (zh) | 一种无钴马氏体时效钢冷轧薄带的制造方法 | |
CN112522576A (zh) | 一种薄规格高耐蚀钢及其生产方法 | |
CN114480962A (zh) | 一种620MPa级煤矿液压支架用钢及其制造方法 | |
CN115216710B (zh) | 一种基于薄带连铸的抗拉强度≥2000MPa的低密度钢的生产方法 | |
CN114657471B (zh) | 一种低碳节能的≥2060MPa级桥梁缆索用盘条的生产方法 | |
CN113604736B (zh) | 一种屈服强度800MPa级高强度中厚板及其制备方法 | |
CN115386782A (zh) | 一种低成本高强镀锌板及其夹芯板的制造工艺 | |
CN114959504A (zh) | 一种免酸洗帘线钢盘条及其生产方法 | |
CN114672722A (zh) | 一种船板用钢板及其生产方法 | |
CN115233080B (zh) | 一种基于薄带连铸的抗拉强度≥1800MPa的低密度钢的生产方法 | |
CN114134417B (zh) | 一种屈服强度≥390MPa结构用钢板及制备方法 |
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 | ||
WD01 | Invention patent application deemed withdrawn after publication | ||
WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20220628 |