CN102836968A - Forging method of high nickel ductile iron pressure-containing member for low temperature gas compression machinery used at temperature of minus 76 DEG C to minus 121 DEG C - Google Patents
Forging method of high nickel ductile iron pressure-containing member for low temperature gas compression machinery used at temperature of minus 76 DEG C to minus 121 DEG C Download PDFInfo
- Publication number
- CN102836968A CN102836968A CN2012103437660A CN201210343766A CN102836968A CN 102836968 A CN102836968 A CN 102836968A CN 2012103437660 A CN2012103437660 A CN 2012103437660A CN 201210343766 A CN201210343766 A CN 201210343766A CN 102836968 A CN102836968 A CN 102836968A
- Authority
- CN
- China
- Prior art keywords
- weight
- percentage
- content
- containing member
- parts
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention discloses a forging method of a high nickel ductile iron pressure-containing member for a low temperature gas compression machinery used at a temperature of minus 76 DEG C to minus 121 DEG C. The method comprises the steps of moulding and core making, smelting, furnace-front nodulizing, furnace-front inoculation, pouring, banking-up and mold dismantling, desanding, cleaning, polishing and shot blasting. In the smelting step, metal materials are high-purity pig iron, scrap steel and electrolytic nickel; the weight parts of the high-purity pig iron, the scrap steel and the electrolytic nickel respectively are 45 to 50 parts, 20 to 25 parts and 30 to 33 parts; and the smelting process comprises the steps of firstly adding 30 to 33 parts by weight of electrolytic nickel into a furnace floor of a medium-frequency induction furnace, then placing 45 to 50 parts by weight of high-purity pig iron to carry out power-on smelting, adding 20 to 25 parts by weight of scrap steel when the furnace temperature reaches 1,300 to 1,350 DEG C and standing for 10 minutes and purifying to obtain molten metal when the temperature is risen to 1,550 to 1,570 DEG C. The high nickel ductile iron pressure-containing member forged according to the forging method disclosed by the invention can meet the using working condition of the low temperature gas compression machinery used at the temperature of minus 76 DEG C to minus 121 DEG C.
Description
Technical field
The present invention relates to a kind of low temperature resistant magnesium iron casting method, specifically relate to the casting method of a kind of being applicable to-76 ℃ nickelic magnesium iron pressure-containing member of the cryogenic gas compressor mechanical of operating temperature between-121 ℃.
Background technology
The intake air temperature of cryogenic gas compressor mechanical pressure-containing member is-121 ℃, and delivery temperature is-76 ℃ to-85 ℃, and the suction and discharge pressure limit requires pressure-containing member that very high impact flexibility is arranged under-121 ℃ worst cold case between 0.2 ~ 0.8MPa.Material requirements to the gas pressure-bearing parts is special; How to make it can in the harsh climate environment, have good low-temperature resistance brittle failure property, corrosion resistance, higher percentage elongation, pressure-bearing property; Having very little linear expansion coefficient and very high low-temperature impact toughness simultaneously, is the key that cryogenic gas compressor mechanical pressure-containing member is made.
Existing gas at normal temperature compressor mechanical parts material mainly is casting pig, alloy cast iron and common spheroidal graphite cast-iron, owing in the defective of aspects such as anti-oxidant, low temperature resistant brittle failure property, can't satisfy the applying working condition of cryogenic gas compressor mechanical.
Summary of the invention
The technical problem that the present invention will solve provides the casting method of the nickelic magnesium iron pressure-containing member of a kind of being used for-76 ℃～-121 ℃ of cryogenic gas compressor mechanicals, uses the nickelic magnesium iron pressure-containing member of casting method casting of the present invention can satisfy the applying working condition of-76 ℃～-121 ℃ of cryogenic gas compressor mechanicals.
For solving the problems of the technologies described above, the present invention is used for the casting method of the nickelic magnesium iron pressure-containing member of-76 ℃～-121 ℃ of cryogenic gas compressor mechanicals, may further comprise the steps:
With the shape of said pressure-containing member, the step of the corresponding molding and core making of structure;
To casting said pressure-containing member carries out melting with metal material step;
Gained molten metal after the melting is carried out the step that stokehold nodularization, stokehold are bred;
Breed the molten metal step of behind molding and core making, pouring into a mould in the gained sand mold of back gained to stokehold nodularization, stokehold, the cast step comprises the step of current-following inoculation and instant inoculation;
Pressure-containing member after the cast is carried out the step of banking fire shake out;
The gained pressure-containing member is carried out the step of desanding, cleaning, polishing and ball blast;
Saidly use the metal material in the step of metal material melting to be high-purity pig iron, steel scrap and electrolytic nickel to casting said pressure-containing member; Weight portion is respectively 45～50 parts, 20～25 parts and 30～33 parts; Content≤0.025% (percentage by weight) of content≤0.03% (percentage by weight) of content≤0.1% (percentage by weight) of content≤1.2% (percentage by weight) of the content of C>=4.35% (percentage by weight), Si, Mn, P, S in the said high-purity pig iron; The content of the content of C≤0.040% (percentage by weight), Si is that the content of (0.034 ~ 0.036) % (percentage by weight), Mn is content≤0.02% (percentage by weight) of (0.11 ~ 0.13) % (percentage by weight), P, content≤0.01% (percentage by weight) of S in the said steel scrap; The content of nickel and cobalt>=99.96% (percentage by weight) in the said electrolytic nickel, the wherein content of cobalt≤0.02% (percentage by weight); The equipment that said melting is adopted is medium-frequency induction furnace; Fusion process comprises that elder generation is added to the medium-frequency induction furnace furnace bottom to the electrolytic nickel of 30～33 weight portions; Put into the high-purity pig iron energising melting of 45～50 weight portions again; Drop into 20～25 weight portion steel scraps when furnace temperature reaches 1300 ~ 1350 ℃, when being warming up to 1550 ~ 1570 ℃, leaving standstill and purified the gained molten metal in 10 minutes; The nodulizer of selecting for use in the step that breed the nodularization of said stokehold, stokehold is the nickel magnesium alloy nodulizer; The granularity of nickel magnesium alloy nodulizer is 5 ~ 25; Bag end addition is 0.9 ~ 1.1 weight portion; The inovulant of selecting for use is a silicon strontium inovulant, and the granularity of silicon strontium inovulant is 10 ~ 20, and bag end addition is 0.35 ~ 0.5 weight portion; The inovulant of selecting for use in current-following inoculation in the said cast step and the instant inoculation step also is silicon strontium inovulant, and current-following inoculation silicon strontium innoculant adding quantity is 0.45 ~ 0.6 weight portion, and instant inoculation silicon strontium innoculant adding quantity is 0.12 ~ 0.2 weight portion.
Adopt the nickelic magnesium iron pressure-containing member superior performance that is used for-76 ℃～-121 ℃ of cryogenic gas compressor mechanicals of casting method casting of the present invention, following through detecting each item performance indications:
The specific embodiment
The casting method that the present invention is used for the nickelic magnesium iron pressure-containing member of-76 ℃～-121 ℃ of cryogenic gas compressor mechanicals may further comprise the steps:
With the shape of said pressure-containing member, the step of the corresponding molding and core making of structure.
Select for use the furan resin self curing sand of silicon content more than 95% to fill type, coremaking is selected for use precoated sand 60%, high-purity technical to stir with carborundum 20%, 20% silica sand and furane resins and is formed, and places with the type graphite chilling block at heat energy-saving position; Twice zircon flour coating of sand mold external coating, coating layer thickness 0.8 ~ 1.1mm brushes one deck iron oxide red paint again; Coating layer thickness 0.4 ~ 0.6mm is provided with the special-purpose exothermic riser of corresponding magnesium iron according to magnesium iron graphitization reexpansion feeding principle at end face, and the dimension scale of running gate system sprue, cross gate, ingate is 4:8:3; Whether drill each dimension scale of case check suitable; Add the mould assembling of joint sealing mud bar, clamping after qualified, lay the dirty plate of band retaining, the stifled cup in the mouth of a river, lay secondary current-following inoculation funnel; Put into the inovulant of corresponding proportion, waiting for pouring.
To casting said pressure-containing member carries out melting with metal material step;
Gained molten metal after the melting is carried out the step that stokehold nodularization, stokehold are bred;
Breed the molten metal step of behind molding and core making, pouring into a mould in the gained sand mold of back gained to stokehold nodularization, stokehold, the cast step comprises the step of current-following inoculation and instant inoculation;
Adopt special-purpose magnesium iron bag, press the bag method to be: add nodulizer, inovulant earlier, add special-purpose magnesium iron bits again and cover tamping; Adopt pit to pour method; Go out 60% molten iron earlier, go out 40% molten iron after question response finishes again and carry out the stokehold and breed, beat dirty, pouring temperature and be controlled between 1480 ~ 1500 ℃; Do during cast with stream, instant inoculation, the bleed of igniting.
Pressure-containing member after the cast is carried out the step of banking fire shake out.
Pressure-containing member banking fire below 3 tons was unpacked in 48 hours, and 3.5 ~ 7 tons pressure-containing member banking fire was unpacked in 72 hours, and the pressure-containing member banking fire more than 7 tons was unpacked in 96 hours.
The gained pressure-containing member is carried out the step of desanding, cleaning, polishing and ball blast;
Saidly use the metal material in the step of metal material melting to be high-purity pig iron, steel scrap and electrolytic nickel to casting said pressure-containing member; Weight portion is respectively 45～50 parts, 20～25 parts and 30～33 parts; Content≤0.025% (percentage by weight) of content≤0.03% (percentage by weight) of content≤0.1% (percentage by weight) of content≤1.2% (percentage by weight) of the content of C>=4.35% (percentage by weight), Si, Mn, P, S in the said high-purity pig iron; The content of the content of C≤0.040% (percentage by weight), Si is that the content of (0.034 ~ 0.036) % (percentage by weight), Mn is content≤0.02% (percentage by weight) of (0.11 ~ 0.13) % (percentage by weight), P, content≤0.01% (percentage by weight) of S in the said steel scrap; The content of nickel and cobalt>=99.96% (percentage by weight) in the said electrolytic nickel, the wherein content of cobalt≤0.02% (percentage by weight); The equipment that said melting is adopted is medium-frequency induction furnace; Fusion process comprises that elder generation is added to the medium-frequency induction furnace furnace bottom to the electrolytic nickel of 30～33 weight portions; Put into the high-purity pig iron energising melting of 45～50 weight portions again; Drop into 20～25 weight portion steel scraps when furnace temperature reaches 1300 ~ 1350 ℃, when being warming up to 1550 ~ 1570 ℃, leaving standstill and purified the gained molten metal in 10 minutes; The nodulizer of selecting for use in the step that breed the nodularization of said stokehold, stokehold is the nickel magnesium alloy nodulizer; The granularity of nickel magnesium alloy nodulizer is 5 ~ 25; Bag end addition is 0.9 ~ 1.1 weight portion; The inovulant of selecting for use is a silicon strontium inovulant, and the granularity of silicon strontium inovulant is 10 ~ 20, and bag end addition is 0.35 ~ 0.5 weight portion; The inovulant of selecting for use in current-following inoculation in the said cast step and the instant inoculation step also is silicon strontium inovulant, and current-following inoculation silicon strontium innoculant adding quantity is 0.45 ~ 0.6 weight portion, and instant inoculation silicon strontium innoculant adding quantity is 0.12 ~ 0.2 weight portion.
The nickelic magnesium iron pressure-containing member that is used for-76 ℃～-121 ℃ of cryogenic gas compressor mechanicals that adopts casting method of the present invention casting is through detecting, superior performance, and each item leading indicator is following:
Claims (1)
1. casting method that is used for the nickelic magnesium iron pressure-containing member of-76 ℃～-121 ℃ of cryogenic gas compressor mechanicals may further comprise the steps:
With the shape of said pressure-containing member, the step of the corresponding molding and core making of structure;
To casting said pressure-containing member carries out melting with metal material step;
Gained molten metal after the melting is carried out the step that stokehold nodularization, stokehold are bred;
Breed the molten metal step of behind molding and core making, pouring into a mould in the gained sand mold of back gained to stokehold nodularization, stokehold, the cast step comprises the step of current-following inoculation and instant inoculation;
Pressure-containing member after the cast is carried out the step of banking fire shake out;
The gained pressure-containing member is carried out the step of desanding, cleaning, polishing and ball blast;
It is characterized in that: saidly use the metal material in the step of metal material melting to be high-purity pig iron, steel scrap and electrolytic nickel casting said pressure-containing member; Weight portion is respectively 45～50 parts, 20～25 parts and 30～33 parts; Content≤0.025% (percentage by weight) of content≤0.03% (percentage by weight) of content≤0.1% (percentage by weight) of content≤1.2% (percentage by weight) of the content of C>=4.35% (percentage by weight), Si, Mn, P, S in the said high-purity pig iron; The content of the content of C≤0.040% (percentage by weight), Si is that the content of (0.034 ~ 0.036) % (percentage by weight), Mn is content≤0.02% (percentage by weight) of (0.11 ~ 0.13) % (percentage by weight), P, content≤0.01% (percentage by weight) of S in the said steel scrap; The content of nickel and cobalt>=99.96% (percentage by weight) in the said electrolytic nickel, the wherein content of cobalt≤0.02% (percentage by weight); The equipment that said melting is adopted is medium-frequency induction furnace; Fusion process comprises that elder generation is added to the medium-frequency induction furnace furnace bottom to the electrolytic nickel of 30～33 weight portions; Put into the high-purity pig iron energising melting of 45～50 weight portions again; Drop into 20～25 weight portion steel scraps when furnace temperature reaches 1300 ~ 1350 ℃, when being warming up to 1550 ~ 1570 ℃, leaving standstill and purified the gained molten metal in 10 minutes; The nodulizer of selecting for use in the step that breed the nodularization of said stokehold, stokehold is the nickel magnesium alloy nodulizer; The granularity of nickel magnesium alloy nodulizer is 5 ~ 25; Bag end addition is 0.9 ~ 1.1 weight portion; The inovulant of selecting for use is a silicon strontium inovulant, and the granularity of silicon strontium inovulant is 10 ~ 20, and bag end addition is 0.35 ~ 0.5 weight portion; The inovulant of selecting for use in current-following inoculation in the said cast step and the instant inoculation step also is silicon strontium inovulant, and current-following inoculation silicon strontium innoculant adding quantity is 0.45 ~ 0.6 weight portion, and instant inoculation silicon strontium innoculant adding quantity is 0.12 ~ 0.2 weight portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103437660A CN102836968A (en) | 2012-09-17 | 2012-09-17 | Forging method of high nickel ductile iron pressure-containing member for low temperature gas compression machinery used at temperature of minus 76 DEG C to minus 121 DEG C |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103437660A CN102836968A (en) | 2012-09-17 | 2012-09-17 | Forging method of high nickel ductile iron pressure-containing member for low temperature gas compression machinery used at temperature of minus 76 DEG C to minus 121 DEG C |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102836968A true CN102836968A (en) | 2012-12-26 |
Family
ID=47364842
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012103437660A Pending CN102836968A (en) | 2012-09-17 | 2012-09-17 | Forging method of high nickel ductile iron pressure-containing member for low temperature gas compression machinery used at temperature of minus 76 DEG C to minus 121 DEG C |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102836968A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103266262A (en) * | 2013-04-25 | 2013-08-28 | 中国石油天然气股份有限公司 | High-nickel ductile iron used at low-temperature and casting method thereof |
| CN103589938A (en) * | 2013-10-29 | 2014-02-19 | 吴江市液铸液压件铸造有限公司 | Smelting method of alloy for pressurizer shell |
| CN103725949A (en) * | 2013-07-04 | 2014-04-16 | 陕西柴油机重工有限公司 | Method for producing high-Ni austenite ductile iron exhaust pipe |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56122663A (en) * | 1980-03-04 | 1981-09-26 | Toshiba Corp | Method for manufacturing thick walled casting of spheroidal graphite cast iron containing high nickel |
| CN1923412A (en) * | 2006-09-25 | 2007-03-07 | 西峡县内燃机进排气管有限责任公司 | High nickel austenite spheroidal graphite cast-iron gas exhaust branch pipe casting technique |
| CN101481769A (en) * | 2008-01-07 | 2009-07-15 | 项楠 | High nickel austenite ductile iron valve stem nut and manufacturing method thereof |
| CN101736190A (en) * | 2009-12-09 | 2010-06-16 | 扬州电力设备修造厂 | Alloy austenitic-bainite ductile iron worm gear and preparation process thereof |
| CN102120253A (en) * | 2010-12-29 | 2011-07-13 | 常州华德机械有限公司 | Casting method of nodular cast iron axle box for bogie of multiple unit trains below 40 DEG C |
| CN102269020A (en) * | 2011-08-01 | 2011-12-07 | 西峡县内燃机进排气管有限责任公司 | Method for producing integral volute pressurization exhaust manifold |
| CN102534090A (en) * | 2012-02-15 | 2012-07-04 | 齐齐哈尔市精铸良铸造有限责任公司 | Preparation method of-60 ℃ low-temperature impact nodular cast iron |
| CN102634647A (en) * | 2012-05-11 | 2012-08-15 | 四川城际轨道交通材料有限责任公司 | Low-temperature (minus 60 DEG C) toughness improvement method of nodular cast iron |
-
2012
- 2012-09-17 CN CN2012103437660A patent/CN102836968A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56122663A (en) * | 1980-03-04 | 1981-09-26 | Toshiba Corp | Method for manufacturing thick walled casting of spheroidal graphite cast iron containing high nickel |
| CN1923412A (en) * | 2006-09-25 | 2007-03-07 | 西峡县内燃机进排气管有限责任公司 | High nickel austenite spheroidal graphite cast-iron gas exhaust branch pipe casting technique |
| CN101481769A (en) * | 2008-01-07 | 2009-07-15 | 项楠 | High nickel austenite ductile iron valve stem nut and manufacturing method thereof |
| CN101736190A (en) * | 2009-12-09 | 2010-06-16 | 扬州电力设备修造厂 | Alloy austenitic-bainite ductile iron worm gear and preparation process thereof |
| CN102120253A (en) * | 2010-12-29 | 2011-07-13 | 常州华德机械有限公司 | Casting method of nodular cast iron axle box for bogie of multiple unit trains below 40 DEG C |
| CN102269020A (en) * | 2011-08-01 | 2011-12-07 | 西峡县内燃机进排气管有限责任公司 | Method for producing integral volute pressurization exhaust manifold |
| CN102534090A (en) * | 2012-02-15 | 2012-07-04 | 齐齐哈尔市精铸良铸造有限责任公司 | Preparation method of-60 ℃ low-temperature impact nodular cast iron |
| CN102634647A (en) * | 2012-05-11 | 2012-08-15 | 四川城际轨道交通材料有限责任公司 | Low-temperature (minus 60 DEG C) toughness improvement method of nodular cast iron |
Non-Patent Citations (4)
| Title |
|---|
| 《水泵技术》 20000630 张文华 镍铸铁--一种有发展前途的泵用材料 第41-43页 1 , 第03期 * |
| 张文华: "镍铸铁──一种有发展前途的泵用材料", 《水泵技术》 * |
| 李远才: "《自硬树脂砂工艺原理及应用》", 31 March 2012, 机械工业出版社 * |
| 赵新武: "高镍D5B奥氏体球铁排气管的生产工艺", 《铸造技术》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103266262A (en) * | 2013-04-25 | 2013-08-28 | 中国石油天然气股份有限公司 | High-nickel ductile iron used at low-temperature and casting method thereof |
| CN103266262B (en) * | 2013-04-25 | 2015-02-18 | 中国石油天然气股份有限公司 | High-nickel ductile iron used at low-temperature and casting method thereof |
| CN103725949A (en) * | 2013-07-04 | 2014-04-16 | 陕西柴油机重工有限公司 | Method for producing high-Ni austenite ductile iron exhaust pipe |
| CN103725949B (en) * | 2013-07-04 | 2016-01-06 | 陕西柴油机重工有限公司 | The production method of high Ni austenite spheroidal iron vapor pipe |
| CN103589938A (en) * | 2013-10-29 | 2014-02-19 | 吴江市液铸液压件铸造有限公司 | Smelting method of alloy for pressurizer shell |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102489686B (en) | Method for preparing ceramic particle enhanced steel-base composite material cast by evaporative pattern casting die | |
| CN108531803B (en) | A kind of casting method of spheroidal graphite cast-iron valve body | |
| CN103451510B (en) | The manufacture method of vermicular cast iron piston ring | |
| CN102876962B (en) | Method for manufacturing bainite ductile cast iron piston ring | |
| CN100391656C (en) | High nickel austenite spheroidal graphite cast iron automobile exhaust branch pipe and casting method | |
| CN101407015B (en) | Method for manufacturing vermicular cast iron trolley body | |
| CN105385802A (en) | Casting technique for low-temperature high-tenacity nodular cast iron butterfly valve body | |
| CN111116204B (en) | Prefabricated part of slag blocking wall of main channel of high-performance blast furnace, preparation method and construction method | |
| CN104480381B (en) | A kind of industrial production process of water-cooling metal centrifugal ductile iron pipe | |
| CN107626891A (en) | A kind of preparation method of diesel engine water oil-piping casting mold and water oil-piping | |
| CN102836968A (en) | Forging method of high nickel ductile iron pressure-containing member for low temperature gas compression machinery used at temperature of minus 76 DEG C to minus 121 DEG C | |
| CN102191424A (en) | As-cast gray cast iron braking material with low alloy content and high thermal fatigue strength | |
| CN102019351B (en) | Method for producing spheroidal graphite iron casting with high strength and thick and uniform wall | |
| CN103615901B (en) | The production method of slag runner cooler | |
| CN106424571B (en) | The cavity structure of the middle case of wind power generating set, the method for preparing middle case using the structure | |
| CN103586960A (en) | Repairing technology for in-situ pouring of tapholes of double-taphole blast furnace | |
| CN103266262A (en) | High-nickel ductile iron used at low-temperature and casting method thereof | |
| CN113070447B (en) | Method for casting oil pressure casting | |
| CN102814488A (en) | Casting method for high-nickel ductile iron pressure-bearing component of -41 to -75 DEG C low-temperature gas compression machine | |
| CN101928871B (en) | Production method of arc plank austenite nodular iron casting | |
| CN103320675B (en) | 300 DEG C-350 DEG C high-temperature resistant alloy material and casting method of 300 DEG C-350 DEG C high-temperature compressor pressure-containing member | |
| CN103482987A (en) | Wear resistance casting material for ladle | |
| CN104988378A (en) | Mold special for ductile iron grinding balls and manufacturing technology of mold | |
| CN105401063A (en) | As-cast malleable cast iron cylinder sleeve produced through centrifugal casting and production process of as-cast malleable cast iron cylinder sleeve | |
| CN103073316B (en) | Gunning mix for main iron runner of blast furnace and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20121226 |