CN107520274A - A kind of preparation method of ferrite 436L seamless stainless steels seamless steel pipe coil pipe - Google Patents
A kind of preparation method of ferrite 436L seamless stainless steels seamless steel pipe coil pipe Download PDFInfo
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- CN107520274A CN107520274A CN201710809783.1A CN201710809783A CN107520274A CN 107520274 A CN107520274 A CN 107520274A CN 201710809783 A CN201710809783 A CN 201710809783A CN 107520274 A CN107520274 A CN 107520274A
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- China
- Prior art keywords
- coil pipe
- steel pipe
- pickling
- finished product
- product
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- 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.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/15—Making tubes of special shape; Making tube fittings
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
-
- 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
- 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
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium 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
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
Abstract
Present invention is disclosed a kind of preparation method of ferrite 436L seamless stainless steels seamless steel pipe coil pipe, comprise the following steps：（1）First time pickling；（2）Reconditioning；（3）Roll and pull out joint；（4）Disk is drawn；（5）Deoil；（6）Judge whether to meet finished product；（7）Middle product heat treatment；（8）Middle product pickling；（9）Finished product is heat-treated；（10）Finished product acid-washing；（11）Product inspection；The steel pipe includes Fe, C, Si, Mn, P, S and Cr.The present invention solves demand of the pipe in length, and make coil pipe both can require higher pipe with convenience in transport in terms of can making length again, applied widely, improve the quality of product.
Description
Technical field
The present invention relates to a kind of manufacture of stainless-steel seamless pipe, and in particular to a kind of ferrite 436L seamless stainless steels without
The preparation method for stitching steel pipe coil pipe.
Background technology
Stainless-steel seamless pipe is a kind of with hollow section, the non-jointed strip steel in periphery.It is resistance to air, steaming
The steel pipe of the chemical etching dielectric corrosion such as the weak corrosive medium such as vapour, water and acid, alkali, salt.Also known as stainless acid resistant steel pipe, with me
The implementation of state's policies of reform and opening to the outside world, national economy obtain rapid growth, and town-property, public building and tourist facilities are largely emerging
Build, new requirement is proposed to hot water supply and domestic water supply.Particularly quality problem, people increasingly pay attention to, it is desirable to
Also improve constantly.This common pipe materials of coating steel pipe under the influence of national relevant policies, will be gradually backed out because of its susceptibility-to-corrosion
The arena of history, the common pipe materials of plastic tube, multiple tube and copper pipe into pipe-line system.But in many cases, stainless steel tube is more
There are superiority, particularly wall thickness to be only 0.6~1.2mm thin-wall stainless steel in good system about drinking water, hot-water heating system and incite somebody to action
Safety, the water supply system put in the first place of health, have the characteristics that securely and reliably, it is hygienic environment-protecting, economic and practical.By domestic and international work
Journey facts have proved be best water supply system combination property, new, energy-conservation and environment-friendly type one of tubing, and it is a kind of have very much it is competing
The water-feeding pipes of power are striven, unrivaled effect will be played to improving water quality, improving people's living standard.In water supply pipe in building
In system, because coating steel pipe has finished on the history of century-old splendidness, various novel plastics pipes and compound be in control develop rapidly,
But various tubing are also to some extent there is some shortcomings, far from the complete needs for adapting to water supply piping and country to drinking
Water and the requirement about water quality.Therefore, relevant expert foretells：Building Supplies Water Pipe is finally restored to the epoch of metal tube.
According to the application experience of foreign countries, it is one of best tubing of combination property that thin-wall stainless steel is assert in metal tube.
Instantly the seamless steel pipe used is generally all that list structure is used and transported, and quality is general, in transport more not
Just, and because using list structure, area occupied is big, and freight volume is smaller, causes using effect not good enough.
The content of the invention
It is an object of the invention to provide a kind of demand for solving pipe in length, and making coil pipe both can conveniently transport
It is defeated, can make again and higher pipe is required in terms of length, it is applied widely, improve product quality ferrite 436L without
The preparation method for stitching stainless-steel seamless pipe coil pipe.
The technical scheme is that a kind of preparation method of ferrite 436L seamless stainless steels seamless steel pipe coil pipe, bag
Include following steps：
（1）First time pickling：Carrying out pickling to the raw material that detected, the pickle in pickling processes uses 10-18% hydrochloric acid,
Remaining is water；
（2）Reconditioning：The reconditioning of the defects of raw material is clean；
（3）Roll and pull out joint：Processed raw material by using the method for cold-drawn, cold rolling, raw material is formed steel pipe type, in the process of processing
In, cold-rolled lubricating oil can be added in cold-rolling process, effectively reduces coefficient of friction, cold-drawn is exactly to gold in the case where not heating
Category is pulled out with drawbench, is also required to first lubricate before pulling out；
（4）Disk is drawn：Steel pipe is formed into coil pipe by plate drawing machine drawing, disk adds drawing oil when drawing；
（5）Deoil：Coil pipe inwall is deoiled totally with the mode that dried compressed air is combined using sponge, sponge is filled in
One in coil pipe, get other end of the sponge out of coil pipe using dried compressed air, whole process sponge can be with
The greasy dirt of coil pipe inwall is taken away, circulation is multiple, until not having greasy dirt on the sponge block got；
（6）Judge whether to meet finished product：Product heat treatment and middle product pickling among being carried out if not being, then carry out finished product heat in this way
Processing, finished product acid-washing and product inspection；
（7）Middle product heat treatment：By middle product heating-up temperature between 770-780 DEG C, after held for some time, room is cooled to
Temperature；
（8）Middle product pickling：Coil pipe after middle product are heat-treated removes the oxide skin and rust on its surface using pickle,
Pickle in pickling processes should use 10-18% hydrochloric acid, and remaining is water, afterwards repeat step（4）、（5）、（6）；
（9）Finished product is heat-treated：Finished product coil pipe is heated, between seamless steel pipe heating-up temperature is 770-780 DEG C；
（10）Finished product acid-washing：Removed using acid solution by the oxide skin and rust in finished product coil surface, it is ensured that surface is clean
It is smooth；
（11）Product inspection：Answered by surface examination, hydraulic test, nondestructive testing, intercrystalline corrosion inspection, chloride+sulfide
Power corrosion test, grain size, tension test, flaring test, flattening test, hardness test, analysis of carbon and sulfur are to the finished product after pickling
Coil pipe carries out final inspection；
The steel pipe includes Fe, C, Si, Mn, P, S, Ni, Cr and Mo.
In a preferred embodiment of the present invention, each Ingredients Weight percentage composition in the steel pipe is 0-0.025%'s
C, 0-1.0% Si, 0-1.0% Mn, 0-0.1.0% P, 0-0.030% S, 0-0.03% Ni, 16.0-19.0% Cr,
0.75-1.25% Mo, and the Fe of surplus.
In a preferred embodiment of the present invention, the steel pipe tensile strength Rm >=360MPa, elongation percentage >=20%, HBS >=
183。
In a preferred embodiment of the present invention, the first time acid pickling step, middle product acid pickling step and finished acid
Wash in step, the temperature of pickling is 20-60 DEG C, and the time of pickling is 40 minutes.
In a preferred embodiment of the present invention, it is described to roll that to pull out coefficient of friction in joint step be 1.20-1.40.
In a preferred embodiment of the present invention, in the finished product heat treatment step, soaking time and wall thickness of seamless steel tube
Between relation be（2-3）min/mm.
Of the present invention is a kind of preparation method of ferrite 436L seamless stainless steels seamless steel pipe coil pipe, solves pipe
Demand in length, make coil pipe and can both require higher pipe with convenience in transport in terms of can making length again, and be applicable model
Enclose the quality for extensively, improving product.
Brief description of the drawings
Fig. 1 is the process flow diagram of a preferred embodiment of the present invention.
Embodiment
Presently preferred embodiments of the present invention is described in detail below so that advantages and features of the invention can be easier to by
It will be appreciated by those skilled in the art that apparent clearly defined so as to be made to protection scope of the present invention.
Of the present invention is a kind of preparation method of ferrite 436L seamless stainless steels seamless steel pipe coil pipe, referring to Fig. 1 institutes
Show, comprise the following steps：
（1）First time pickling：Carrying out pickling to the raw material that detected, the pickle in pickling processes uses 10-18% hydrochloric acid,
Remaining is water, and the temperature of pickling is 20-60 DEG C, and the time of pickling is 40 minutes, surface quality flawless, breach, pit, pockmark
Phenomena such as, lumber recovery and surface quality are improved, improves operating efficiency；
（2）Reconditioning：The reconditioning of the defects of raw material is clean, in order to follow-up processing, the table of lumber recovery and product can be improved
Face quality；
（3）Roll and pull out joint：Processed raw material by using the method for cold-drawn, cold rolling, raw material is formed steel pipe type, in the process of processing
In, cold-rolled lubricating oil can be added in cold-rolling process, coefficient of friction is effectively reduced, coefficient of friction 1.20-1.40, improves corresponding
Roll-force, required power is low, obtains satisfied rolling parameter；Improve surface brightness, roll that to prolong thickness uniform；Cooling effect
It is good, hot rolling can be taken away rapidly, protect roll and rolled piece；Also there is short-term rustless property, it is possible to provide rolled piece temporary rust prevention is protected,
Cold-drawn is exactly that metal is pulled out with drawbench in the case where not heating, and is also required to first lubricate before pulling out, cold rolling and cold-drawn are all not required to
Heat, make technique not have to carry out under high temperature again, save the energy；
（4）Disk is drawn：Steel pipe is formed into coil pipe by plate drawing machine drawing, disk adds drawing oil when drawing, ensure that pipe is pulled through journey in disk
In will not because disk draw and caused by defect, it is ensured that its surface is smooth, and finish is good；
（5）Deoil：Coil pipe inwall is deoiled totally with the mode that dried compressed air is combined using sponge, sponge is filled in
One in coil pipe, get other end of the sponge out of coil pipe using dried compressed air, whole process sponge can be with
The greasy dirt of coil pipe inwall is taken away, circulation is multiple, and until not having greasy dirt on the sponge block got, oil can be removed by doing these work
Totally, the quality and lumber recovery of product are improved；
（6）Judge whether to meet finished product：Product heat treatment and middle product pickling among being carried out if not being, then carry out finished product heat in this way
Processing, finished product acid-washing and product inspection；
（7）Middle product heat treatment：By middle product heating-up temperature between 770-780 DEG C, middle product are more slightly higher than finished product temperature,
The time of insulation is relatively longer.After held for some time, the operation of room temperature is cooled to, is heat-treated at this temperature, is had
Beneficial to the quality of lifting steel pipe, after the Technology for Heating Processing of middle product, reduction that the hardness of coil pipe can relative, but have very
High work hardening capacity and excellent wearability and toughness, are not only convenient for follow-up operation, and in the mistake of following process
Hardness also can constantly be strengthened in journey so that steel pipe composition with change, crystal grain thinning, eliminates stress, improves toughness and extension
Property, improve mechanical performance, comprehensive mechanical performance is good, is prepared for next process, and pickling thereafter can more reach bright and clean
Surface quality；
（8）Middle product pickling：Coil pipe after middle product are heat-treated removes the oxide skin and rust on its surface using pickle,
Pickle in pickling processes should use 10-18% hydrochloric acid, and remaining is water, and the temperature of pickling is 20-60 DEG C, the time of pickling
For 40 minutes, operating efficiency is improved, afterwards repeat step（4）、（5）、（6）；
（9）Finished product is heat-treated：Finished product coil pipe is heated, between seamless steel pipe heating-up temperature is 770-780 DEG C, soaking time
Relation between wall thickness of seamless steel tube is（2-3）Min/mm, mm refer to the unit for representing wall thickness, when min refers to represent insulation
Between unit minute, soaking time generally 2-3 times of wall thickness on the basis of this again, by the heat treatment of above-mentioned semi-finished product and finished product
Afterwards, especially at a suitable temperature, the steel pipe of manufacture can give full play to the excellent properties of this steel grade；
（10）Finished product acid-washing：Removed using acid solution by the oxide skin and rust in finished product coil surface, it is ensured that surface is clean
Smooth, the temperature of pickling is 20-60 DEG C, and the time of pickling is 40 minutes；
（11）Product inspection：Answered by surface examination, hydraulic test, nondestructive testing, intercrystalline corrosion inspection, chloride+sulfide
Power corrosion test, grain size, tension test, flaring test, flattening test, hardness test, analysis of carbon and sulfur are to the finished product after pickling
Coil pipe carries out final inspection；
The steel pipe includes Fe, C, Si, Mn, P, S, Ni, Cr and Mo, each Ingredients Weight percentage composition in the steel pipe
For 0-0.025% C, 0-1.0% Si, 0-1.0% Mn, 0-0.1.0% P, 0-0.030% S, 0-0.03% Ni,
16.0-19.0% Cr, 0.75-1.25% Mo, and the Fe of surplus.
The steel pipe tensile strength Rm >=360MPa, elongation percentage >=20%, HBS >=183.
Stainless steel of the trade mark for 436L is used, this steel grade：Heat resistance, corrosion resistance are good, because containing nb, zr element, therefore
Processability, welding are outstanding.
The elongation percentage of general 436L steel grades can reach 33%, and hardness can be controlled to more than 150, in blast pipe manufacture
Necking and expanding it is all highly beneficial.
436L purposes：Washing machine, automobile exhaust pipe, electronic product, silencer front and rear cover, kitchen and electrical appliance class
A kind of preparation method of ferrite 436L seamless stainless steels seamless steel pipe coil pipe of the present invention, solves pipe in length
Demand, making coil pipe can both be made and higher pipe is required in terms of length again with convenience in transport, applied widely, be carried
The high quality of product.
The embodiment of the present invention is the foregoing is only, but protection scope of the present invention is not limited thereto, it is any
Those skilled in the art disclosed herein technical scope in, can without the change that creative work is expected or
Replace, should all be included within the scope of the present invention.Therefore, protection scope of the present invention should be limited with claims
Fixed protection domain is defined.
Claims (6)
- A kind of 1. preparation method of ferrite 436L seamless stainless steels seamless steel pipe coil pipe, it is characterised in that：Comprise the following steps：（1）First time pickling：Carrying out pickling to the raw material that detected, the pickle in pickling processes uses 10-18% hydrochloric acid, Remaining is water；（2）Reconditioning：The reconditioning of the defects of raw material is clean；（3）Roll and pull out joint：Processed raw material by using the method for cold-drawn, cold rolling, raw material is formed steel pipe type, in the process of processing In, cold-rolled lubricating oil can be added in cold-rolling process, effectively reduces coefficient of friction, cold-drawn is exactly to gold in the case where not heating Category is pulled out with drawbench, is also required to first lubricate before pulling out；（4）Disk is drawn：Steel pipe is formed into coil pipe by plate drawing machine drawing, disk adds drawing oil when drawing；（5）Deoil：Coil pipe inwall is deoiled totally with the mode that dried compressed air is combined using sponge, sponge is filled in One in coil pipe, get other end of the sponge out of coil pipe using dried compressed air, whole process sponge can be with The greasy dirt of coil pipe inwall is taken away, circulation is multiple, until not having greasy dirt on the sponge block got；（6）Judge whether to meet finished product：Product heat treatment and middle product pickling among being carried out if not being, then carry out finished product heat in this way Processing, finished product acid-washing and product inspection；（7）Middle product heat treatment：By middle product heating-up temperature between 770-780 DEG C, after held for some time, room is cooled to Temperature；（8）Middle product pickling：Coil pipe after middle product are heat-treated removes the oxide skin and rust on its surface using pickle, Pickle in pickling processes should use 10-18% hydrochloric acid, and remaining is water, afterwards repeat step（4）、（5）、（6）；（9）Finished product is heat-treated：Finished product coil pipe is heated, between seamless steel pipe heating-up temperature is 770-780 DEG C；（10）Finished product acid-washing：Removed using acid solution by the oxide skin and rust in finished product coil surface, it is ensured that surface is clean It is smooth；（11）Product inspection：Answered by surface examination, hydraulic test, nondestructive testing, intercrystalline corrosion inspection, chloride+sulfide Power corrosion test, grain size, tension test, flaring test, flattening test, hardness test, analysis of carbon and sulfur are to the finished product after pickling Coil pipe carries out final inspection；The steel pipe includes Fe, C, Si, Mn, P, S, Ni, Cr and Mo.
- 2. the preparation method of ferrite 436L seamless stainless steels seamless steel pipe coil pipe according to claim 1, its feature exist In：The C, 0-1.0% Si, 0-1.0% Mn, 0- that each Ingredients Weight percentage composition in the steel pipe is 0-0.025% 0.1.0% P, 0-0.030% S, 0-0.03% Ni, 16.0-19.0% Cr, 0.75-1.25% Mo, and the Fe of surplus.
- 3. the preparation method of ferrite 436L seamless stainless steels seamless steel pipe coil pipe according to claim 1, its feature exist In：The steel pipe tensile strength Rm >=360MPa, elongation percentage >=20%, HBS >=183.
- 4. the preparation method of ferrite 436L seamless stainless steels seamless steel pipe coil pipe according to claim 1, its feature exist In：In the first time acid pickling step, middle product acid pickling step and finished product acid-washing step, the temperature of pickling is 20-60 DEG C, acid The time washed is 40 minutes.
- 5. the preparation method of ferrite 436L seamless stainless steels seamless steel pipe coil pipe according to claim 1, its feature exist In：It is described to roll that to pull out coefficient of friction in joint step be 1.20-1.40.
- 6. the preparation method of ferrite 436L seamless stainless steels seamless steel pipe coil pipe according to claim 1, its feature exist In：In the finished product heat treatment step, the relation between soaking time and wall thickness of seamless steel tube is（2-3）min/mm.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710264867 | 2017-04-21 | ||
| CN2017102648671 | 2017-04-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107520274A true CN107520274A (en) | 2017-12-29 |
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ID=60735769
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710809783.1A Pending CN107520274A (en) | 2017-04-21 | 2017-09-11 | A kind of preparation method of ferrite 436L seamless stainless steels seamless steel pipe coil pipe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109848244A (en) * | 2018-12-27 | 2019-06-07 | 四川艾格瑞特模具科技股份有限公司 | A kind of production method of stainless-steel seamless pipe |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02258113A (en) * | 1987-06-23 | 1990-10-18 | Susumu Koyata | Seamless steel pipe |
| CN201061782Y (en) * | 2007-06-11 | 2008-05-21 | 中国二十冶建设有限公司 | Pipe gas flushing gun |
| CN102465200A (en) * | 2010-11-05 | 2012-05-23 | 苏州贝思特金属制品有限公司 | Manufacture method for seamless steel tube |
| CN103817168A (en) * | 2014-02-21 | 2014-05-28 | 无锡隆达金属材料有限公司 | Drawing production process of monel alloy pipe |
| CN105935711A (en) * | 2016-07-10 | 2016-09-14 | 江苏凯宇不锈钢制品有限公司 | Preparation technology of stainless steel coil pipes |
-
2017
- 2017-09-11 CN CN201710809783.1A patent/CN107520274A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02258113A (en) * | 1987-06-23 | 1990-10-18 | Susumu Koyata | Seamless steel pipe |
| CN201061782Y (en) * | 2007-06-11 | 2008-05-21 | 中国二十冶建设有限公司 | Pipe gas flushing gun |
| CN102465200A (en) * | 2010-11-05 | 2012-05-23 | 苏州贝思特金属制品有限公司 | Manufacture method for seamless steel tube |
| CN103817168A (en) * | 2014-02-21 | 2014-05-28 | 无锡隆达金属材料有限公司 | Drawing production process of monel alloy pipe |
| CN105935711A (en) * | 2016-07-10 | 2016-09-14 | 江苏凯宇不锈钢制品有限公司 | Preparation technology of stainless steel coil pipes |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109848244A (en) * | 2018-12-27 | 2019-06-07 | 四川艾格瑞特模具科技股份有限公司 | A kind of production method of stainless-steel seamless pipe |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 215500 Changshou City Xinzhuang (Yang Yuan) Industrial Park, Changshou City, Jiangsu Applicant after: Suzhou fitok metal products Co., Ltd. Address before: 215500 Changshou City Xinzhuang (Yang Yuan) Industrial Zone, Suzhou, Jiangsu Applicant before: Suzhou Best Metal Products Co., Ltd. |
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| 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: 20171229 |