CN101994512A - Technology for manufacturing cutting tooth for mining coal and minerals - Google Patents
Technology for manufacturing cutting tooth for mining coal and minerals Download PDFInfo
- Publication number
- CN101994512A CN101994512A CN 201010529619 CN201010529619A CN101994512A CN 101994512 A CN101994512 A CN 101994512A CN 201010529619 CN201010529619 CN 201010529619 CN 201010529619 A CN201010529619 A CN 201010529619A CN 101994512 A CN101994512 A CN 101994512A
- Authority
- CN
- China
- Prior art keywords
- tooth body
- crown
- tooth
- parts
- pick
- 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.)
- Granted
Links
Abstract
The invention relates to technology for manufacturing a cutting tooth for mining coal and minerals. The cutting tooth comprises a tooth body and a tooth tip, and the technology is characterized by comprising the following steps of: (1) pre-manufacturing the tooth body; (2) pre-manufacturing the tooth tip; (3) assembling the tooth tip and the tooth body; (4) cladding a wear-resistant layer on the surface of the tooth body of the assembled cutting tooth; (5) performing salt bath treatment and quenching treatment on the product in the step (4); (6) performing low-temperature tempering treatment on the quenched product; and (7) performing post-treatment on the tempered product so as to obtain the finished cutting tooth. The deformation and thermal effect of the cutting tooth treated by the treatment technology are extremely low, and the service life is prolonged by 5 to 6 times. Compared with the traditional cutting teeth, the cutting tooth with the wear-resistant layer on the surface of the tooth body has higher Vickers hardness, and through detection, the hardness is more than 1,800 and is far greater than the Vickers hardness of the traditional cutting teeth. Due to higher hardness, the service life of the cutting tooth is greatly prolonged.
Description
Technical field
The present invention relates to a kind of manufacturing process of the mining apparatus of mining, relate in particular to a kind of manufacturing process of the pick for mining of mining.
Background technology
Pick is the strength member on the coal-winning machine, also is to consume maximum, the part of easy damage on the coal-winning machine.At present, traditional pick of the various models that domestic coal-winning machine uses generally all adopts alloy steel tungsten carbide button, its cost of production height.The conventional coal mining mining pick carbide alloy crown that refers to burn-on in tooth head position, pick steel body tooth body is made by special steel (as 30CrMnTi, 30CrMnSi etc.).Because the material hardness of pick steel body tooth body is significantly less than the hard-metal insert head, be easy to wearing and tearing, so often occur that the hard-metal insert head process goes out, comes off, sealing-off and in working angles with phenomenons such as steel body tooth body fractures, cause pick lower application life; Another kind is to adopt the castingin pick, is to adopt to put carbide alloy in the casting mold die cavity, pours into a mould the one-shot forming of iron liquid then, but the castingin pick occurs shrinkage porosite easily, defective such as is mingled with in casting process, has a strong impact on application life.
Summary of the invention
The present invention is in order to overcome the deficiencies in the prior art, and provide a kind of easy to process, produced pick has high impact resistance and abrasion resistance, the manufacturing process of the coal mining pick for mining of long service life.
The technical solution used in the present invention:
Described pick comprises tooth body and crown, its manufacturing process comprises the steps: the preproduction of (1) tooth body, a) at first chooses the blank that the column type carbon tool steel carries out the tapered tooth body of precision forging, wherein, initial forging temperature is 1050-1150 ℃, and final forging temperature is 750-800 ℃; B) carrying out spheroidizing handles, above-mentioned tooth body blank is put into stove be heated to 800-850 ℃ and the insulating box of this temperature insulation 2-3 hour, and then under 650-700 ℃, be incubated 1-2 hour, and then be incubated 1-2 hour down at 400-450 ℃, naturally cool to normal temperature afterwards; C) the tooth body blank after the above-mentioned processing is carried out machining, obtain conical tooth body body, the crown hole is bored in the end on one's body tooth then, and grinding process is carried out in the crown hole, and making gas fineness is more than 0.8; D) the tooth body is carried out Carburization Treatment; (2) preproduction of crown, a) 5 parts of 2 parts of 4 parts of 5 parts of 5 parts of 8 parts of 5 parts of 2 parts of 15 parts of 45 parts of bortz powders, iron powders, cobalt powders, nickel powders, tungsten carbide powders, copper powders, silicon parts, manganese powders, vanadium powders, boron carbides and the metal dust of choosing by weight of 4 parts of titanium carbides put into the ball mill mixing machine and fully mixed, then through preserving after the drying box drying; B) 2%-5% according to the weight of above-mentioned compound takes by weighing sliding agent, and sliding agent is selected ethanol, glycerine or their mixture for use, sliding agent is added in the above-mentioned dried metal dust further stir, and above-mentioned metal dust can be mixed; C) above-mentioned well-mixed metal dust is sent into the forcing press Thermocompressed sintering and forming, wherein pressure is 3-7MPa, and sintering temperature is 800-1200 ℃, and the heat-insulation pressure keeping time is 10-20 minute; D) reconditioning and putting the first edge on a knife or a pair of scissors after the crown sintering is finished, need be carried out reconditioning to it and put the first edge on a knife or a pair of scissors, and makes the size of crown, the instructions for use that external diameter reaches regulation; E) crown being carried out carbo-nitriding handles; (3) assembling of crown and tooth body, a) tooth body and crown being put into concentration is that the watery hydrochloric acid of 0.05-0.1mol/L soaks, soak time is 20-30 minute, and clean with alcohol wash, removes the oil rust dirt on tooth body and crown surface; B) crown is pressed in the crown hole of tooth body end with forcing press, and carries out soldering two are fixed together; (4) cladding wearing layer is carried out on the tooth body surface of the pick that assembles, the thickness of wearing layer is 2-3mm, adopt compression arc plasma cladding lathe that pick is clamped on the whirligig, cladding is that pick rotates under level, the compression beam-plasma is to tooth body surface melting, inject the mixed-powder of forming by carbon, silicon, nickel, chromium, manganese, titanium, vanadium, boron, tungsten in the molten bath of dissolving in moment, merge with the tooth body behind the powder smelting and solidify the formation wearing layer; (5) product with above-mentioned steps (4) carries out the salt bath processing, in salt bath furnace, add mass percent and be in the mixture of salt bath deoxidier of 65% barium monoxide, 30% sodium chloride and 5%, temperature in the salt bath furnace is elevated to 850-900 ℃, then the product in the step (4) is put into salt bath furnace, take out rapidly when treating that the pick temperature rises to furnace temperature and put into cold water and quench and pull out, put into machine oil then and cool off; (6) product after quenching is carried out lonneal and handle, the product by heating after will quenching earlier is placed on and naturally cools to normal temperature in the vacuum to 150-200 ℃; (7) product after the tempering is carried out post-processed, it is carried out polishing grinding, just can obtain the pick finished product with polishing machine.
Go up and between above-mentioned steps (5) and step (6), also have annealing steps, cooling naturally again after the back pick that will quench is heated to 500-600 ℃.
The technique effect that the present invention obtains:
1, the distortion and the heat affecting of pick were minimum after pick of the present invention was handled through treatment process of the present invention, improve 5-6 application life doubly, in addition, the wearing layer on tooth body surface is compared with traditional pick, its Vickers hardness improves greatly, according to detection, hardness can reach more than 1800, is far longer than the Vickers hardness of traditional pick, because hardness is higher, the application life of also having improved pick greatly;
2, by the setting of annealing steps, can further improve the performance of pick, further prolong its application life.
The specific embodiment
Below embodiments of the present invention are described further.
A kind of manufacturing process of the pick for mining of mining, described pick comprises tooth body and crown, its manufacturing process comprises the steps: the preproduction of (1) tooth body, a) at first choose the blank that the column type carbon tool steel carries out the tapered tooth body of precision forging, wherein, initial forging temperature is 1050-1150 ℃, and final forging temperature is 750-800 ℃; B) carrying out spheroidizing handles, above-mentioned tooth body blank is put into stove be heated to 800-850 ℃ and the insulating box of this temperature insulation 2-3 hour, and then under 650-700 ℃, be incubated 1-2 hour, and then be incubated 1-2 hour down at 400-450 ℃, naturally cool to normal temperature afterwards; C) the tooth body blank after the above-mentioned processing is carried out machining, obtain conical tooth body body, the crown hole is bored in the end on one's body tooth then, and grinding process is carried out in the crown hole, and making gas fineness is more than 0.8; D) the tooth body is carried out Carburization Treatment; (2) preproduction of crown, a) 5 parts of 2 parts of 4 parts of 5 parts of 5 parts of 8 parts of 5 parts of 2 parts of 15 parts of 45 parts of bortz powders, iron powders, cobalt powders, nickel powders, tungsten carbide powders, copper powders, silicon parts, manganese powders, vanadium powders, boron carbides and the metal dust of choosing by weight of 4 parts of titanium carbides put into the ball mill mixing machine and fully mixed, then through preserving after the drying box drying; B) 2%-5% according to the weight of above-mentioned compound takes by weighing sliding agent, and sliding agent is selected ethanol, glycerine or their mixture for use, sliding agent is added in the above-mentioned dried metal dust further stir, and above-mentioned metal dust can be mixed; C) above-mentioned well-mixed metal dust is sent into the forcing press Thermocompressed sintering and forming, wherein pressure is 3-7MPa, and sintering temperature is 800-1200 ℃, and the heat-insulation pressure keeping time is 10-20 minute; D) reconditioning and putting the first edge on a knife or a pair of scissors after the crown sintering is finished, need be carried out reconditioning to it and put the first edge on a knife or a pair of scissors, and makes the size of crown, the instructions for use that external diameter reaches regulation; E) crown being carried out carbo-nitriding handles; (3) assembling of crown and tooth body, a) tooth body and crown being put into concentration is that the watery hydrochloric acid of 0.05-0.1mol/L soaks, soak time is 20-30 minute, and clean with alcohol wash, removes the oil rust dirt on tooth body and crown surface; B) crown is pressed in the crown hole of tooth body end with forcing press, and carries out soldering two are fixed together; (4) cladding wearing layer is carried out on the tooth body surface of the pick that assembles, the thickness of wearing layer is 2-3mm, adopt compression arc plasma cladding lathe that pick is clamped on the whirligig, cladding is that pick rotates under level, the compression beam-plasma is to tooth body surface melting, inject the mixed-powder of forming by carbon, silicon, nickel, chromium, manganese, titanium, vanadium, boron, tungsten in the molten bath of dissolving in moment, merge with the tooth body behind the powder smelting and solidify the formation wearing layer; (5) product with above-mentioned steps (4) carries out the salt bath processing, in salt bath furnace, add mass percent and be in the mixture of salt bath deoxidier of 65% barium monoxide, 30% sodium chloride and 5%, temperature in the salt bath furnace is elevated to 850-900 ℃, then the product in the step (4) is put into salt bath furnace, take out rapidly when treating that the pick temperature rises to furnace temperature and put into cold water and quench and pull out, put into machine oil then and cool off; (6) product after quenching is carried out lonneal and handle, the product by heating after will quenching earlier is placed on and naturally cools to normal temperature in the vacuum to 150-200 ℃; (7) product after the tempering is carried out post-processed, it is carried out polishing grinding, just can obtain the pick finished product with polishing machine.。
Between above-mentioned steps (5) and step (6), also has annealing steps, cooling naturally again after the back pick that will quench is heated to 500-600 ℃.
Protection scope of the present invention is not limited to the above embodiments, and obviously, those skilled in the art can carry out various changes and distortion and do not depart from the scope of the present invention and spirit the present invention.If these changes and distortion belong in the scope of claim of the present invention and equivalent technologies thereof, then the intent of the present invention also comprises these changes and is out of shape interior.
Claims (2)
1. the manufacturing process of the pick for mining of mining, described pick comprises tooth body and crown, it is characterized in that: its manufacturing process comprises the steps: the preproduction of (1) tooth body, a) at first choose the blank that the column type carbon tool steel carries out the tapered tooth body of precision forging, wherein, initial forging temperature is 1050-1150 ℃, and final forging temperature is 750-800 ℃; B) carrying out spheroidizing handles, above-mentioned tooth body blank is put into stove be heated to 800-850 ℃ and the insulating box of this temperature insulation 2-3 hour, and then under 650-700 ℃, be incubated 1-2 hour, and then be incubated 1-2 hour down at 400-450 ℃, naturally cool to normal temperature afterwards; C) the tooth body blank after the above-mentioned processing is carried out machining, obtain conical tooth body body, the crown hole is bored in the end on one's body tooth then, and grinding process is carried out in the crown hole, and making gas fineness is more than 0.8; D) the tooth body is carried out Carburization Treatment; (2) preproduction of crown, a) 5 parts of 2 parts of 4 parts of 5 parts of 5 parts of 8 parts of 5 parts of 2 parts of 15 parts of 45 parts of bortz powders, iron powders, cobalt powders, nickel powders, tungsten carbide powders, copper powders, silicon parts, manganese powders, vanadium powders, boron carbides and the metal dust of choosing by weight of 4 parts of titanium carbides put into the ball mill mixing machine and fully mixed, then through preserving after the drying box drying; B) 2%-5% according to the weight of above-mentioned compound takes by weighing sliding agent, and sliding agent is selected ethanol, glycerine or their mixture for use, sliding agent is added in the above-mentioned dried metal dust further stir, and above-mentioned metal dust can be mixed; C) above-mentioned well-mixed metal dust is sent into the forcing press Thermocompressed sintering and forming, wherein pressure is 3-7MPa, and sintering temperature is 800-1200 ℃, and the heat-insulation pressure keeping time is 10-20 minute; D) reconditioning and putting the first edge on a knife or a pair of scissors after the crown sintering is finished, need be carried out reconditioning to it and put the first edge on a knife or a pair of scissors, and makes the size of crown, the instructions for use that external diameter reaches regulation; E) crown being carried out carbo-nitriding handles; (3) assembling of crown and tooth body, a) tooth body and crown being put into concentration is that the watery hydrochloric acid of 0.05-0.1mol/L soaks, soak time is 20-30 minute, and clean with alcohol wash, removes the oil rust dirt on tooth body and crown surface; B) crown is pressed in the crown hole of tooth body end with forcing press, and carries out soldering two are fixed together; (4) cladding wearing layer is carried out on the tooth body surface of the pick that assembles, the thickness of wearing layer is 2-3mm, adopt compression arc plasma cladding lathe that pick is clamped on the whirligig, cladding is that pick rotates under level, the compression beam-plasma is to tooth body surface melting, inject the mixed-powder of forming by carbon, silicon, nickel, chromium, manganese, titanium, vanadium, boron, tungsten in the molten bath of dissolving in moment, merge with the tooth body behind the powder smelting and solidify the formation wearing layer; (5) product with above-mentioned steps (4) carries out the salt bath processing, in salt bath furnace, add mass percent and be in the mixture of salt bath deoxidier of 65% barium monoxide, 30% sodium chloride and 5%, temperature in the salt bath furnace is elevated to 850-900 ℃, then the product in the step (4) is put into salt bath furnace, take out rapidly when treating that the pick temperature rises to furnace temperature and put into cold water and quench and pull out, put into machine oil then and cool off; (6) product after quenching is carried out lonneal and handle, the product by heating after will quenching earlier is placed on and naturally cools to normal temperature in the vacuum to 150-200 ℃; (7) product after the tempering is carried out post-processed, it is carried out polishing grinding, just can obtain the pick finished product with polishing machine.
2. coal mining pick for mining according to claim 1 is characterized in that: also have annealing steps between above-mentioned steps (5) and step (6), cooling naturally again after the back pick that will quench is heated to 500-600 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010529619 CN101994512B (en) | 2010-11-03 | 2010-11-03 | Technology for manufacturing cutting tooth for mining coal and minerals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010529619 CN101994512B (en) | 2010-11-03 | 2010-11-03 | Technology for manufacturing cutting tooth for mining coal and minerals |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101994512A true CN101994512A (en) | 2011-03-30 |
| CN101994512B CN101994512B (en) | 2013-01-23 |
Family
ID=43785191
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010529619 Active CN101994512B (en) | 2010-11-03 | 2010-11-03 | Technology for manufacturing cutting tooth for mining coal and minerals |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101994512B (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102182456A (en) * | 2011-04-22 | 2011-09-14 | 河海大学 | Wear-resistant sparkless shearer pick composite coating and preparation method thereof |
| CN102912164A (en) * | 2012-11-09 | 2013-02-06 | 四川科力特硬质合金股份有限公司 | Method for uniformly dispersing doped rubber of hard alloy mixture |
| CN102925819A (en) * | 2011-08-08 | 2013-02-13 | 王军祥 | High-toughness wear-resistant multiphase steel pick and manufacturing process |
| CN103967500A (en) * | 2014-05-04 | 2014-08-06 | 铜川市宏泰华宇科技有限公司 | Hard alloy cutting teeth for excavating machines and cast-welding technology |
| CN104989399A (en) * | 2015-07-29 | 2015-10-21 | 安庆市华骐机械配件有限公司 | Novel wear-resisting point-attack pick |
| CN105174961A (en) * | 2015-09-15 | 2015-12-23 | 安徽澳德矿山机械设备科技股份有限公司 | Cermet material for cutting pick of coal mining machine |
| CN105201502A (en) * | 2015-09-15 | 2015-12-30 | 安徽澳德矿山机械设备科技股份有限公司 | High-hardness metal ceramic layer wear-resistant cutting tooth |
| CN105543770A (en) * | 2015-12-22 | 2016-05-04 | 湖北鄂瑞孚截齿钻具科技有限公司 | Surface treatment technique for cutting pick |
| CN106148649A (en) * | 2015-04-10 | 2016-11-23 | 阳谷夏工精锻有限公司 | Churning driven wear resistant cutting pick and Technology for Heating Processing |
| CN107263022A (en) * | 2017-05-16 | 2017-10-20 | 江苏创精锻有限公司 | A kind of method for forging and molding with reinforcement pick |
| CN110684887A (en) * | 2019-09-09 | 2020-01-14 | 合肥锟擎科技有限责任公司 | Pick heat treatment process adopting 55SiMnMo as pick body material |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6592304B1 (en) * | 1999-05-28 | 2003-07-15 | Betek Bergbau-Und Hartmetalltechnik Karl-Heinz Simon Gmbh & Co. Kg | Method for tipping a cutter head of an end-milling cutter |
| CN101509376A (en) * | 2009-03-23 | 2009-08-19 | 无锡速力特机械科技有限公司 | Integral conical pick and method for producing the same |
| CN101737044A (en) * | 2009-12-01 | 2010-06-16 | 郑州大学 | High-abrasion resistance cutting teeth of coal-winning machine and production process thereof |
| CN101852080A (en) * | 2010-05-17 | 2010-10-06 | 江阴源丰科技热处理有限公司 | Cutting pick, cutting pick head and manufacturing method thereof |
-
2010
- 2010-11-03 CN CN 201010529619 patent/CN101994512B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6592304B1 (en) * | 1999-05-28 | 2003-07-15 | Betek Bergbau-Und Hartmetalltechnik Karl-Heinz Simon Gmbh & Co. Kg | Method for tipping a cutter head of an end-milling cutter |
| CN101509376A (en) * | 2009-03-23 | 2009-08-19 | 无锡速力特机械科技有限公司 | Integral conical pick and method for producing the same |
| CN101737044A (en) * | 2009-12-01 | 2010-06-16 | 郑州大学 | High-abrasion resistance cutting teeth of coal-winning machine and production process thereof |
| CN101852080A (en) * | 2010-05-17 | 2010-10-06 | 江阴源丰科技热处理有限公司 | Cutting pick, cutting pick head and manufacturing method thereof |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102182456A (en) * | 2011-04-22 | 2011-09-14 | 河海大学 | Wear-resistant sparkless shearer pick composite coating and preparation method thereof |
| CN102925819A (en) * | 2011-08-08 | 2013-02-13 | 王军祥 | High-toughness wear-resistant multiphase steel pick and manufacturing process |
| CN102912164A (en) * | 2012-11-09 | 2013-02-06 | 四川科力特硬质合金股份有限公司 | Method for uniformly dispersing doped rubber of hard alloy mixture |
| CN103967500A (en) * | 2014-05-04 | 2014-08-06 | 铜川市宏泰华宇科技有限公司 | Hard alloy cutting teeth for excavating machines and cast-welding technology |
| CN106148649A (en) * | 2015-04-10 | 2016-11-23 | 阳谷夏工精锻有限公司 | Churning driven wear resistant cutting pick and Technology for Heating Processing |
| CN104989399A (en) * | 2015-07-29 | 2015-10-21 | 安庆市华骐机械配件有限公司 | Novel wear-resisting point-attack pick |
| CN105174961A (en) * | 2015-09-15 | 2015-12-23 | 安徽澳德矿山机械设备科技股份有限公司 | Cermet material for cutting pick of coal mining machine |
| CN105201502A (en) * | 2015-09-15 | 2015-12-30 | 安徽澳德矿山机械设备科技股份有限公司 | High-hardness metal ceramic layer wear-resistant cutting tooth |
| CN105174961B (en) * | 2015-09-15 | 2017-11-24 | 安徽澳德矿山机械设备科技股份有限公司 | Coal winning machine cutting bit cermet material |
| CN105543770A (en) * | 2015-12-22 | 2016-05-04 | 湖北鄂瑞孚截齿钻具科技有限公司 | Surface treatment technique for cutting pick |
| CN107263022A (en) * | 2017-05-16 | 2017-10-20 | 江苏创精锻有限公司 | A kind of method for forging and molding with reinforcement pick |
| CN110684887A (en) * | 2019-09-09 | 2020-01-14 | 合肥锟擎科技有限责任公司 | Pick heat treatment process adopting 55SiMnMo as pick body material |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101994512B (en) | 2013-01-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101994512B (en) | Technology for manufacturing cutting tooth for mining coal and minerals | |
| CN100567548C (en) | A kind of manufacture method of high-vanadium, high-cobalt high speed steel | |
| CN100417827C (en) | Double-metal solid bearing cage and producing process thereof | |
| CN101905184B (en) | Liquid-state bimetal composite hammer for crusher and manufacturing method thereof | |
| CN105127746A (en) | Production process of bearing ring | |
| CN101381850A (en) | Alloyed steel plug for steel tube perforating and production method | |
| CN104294152A (en) | 12Cr2Ni4A structural alloy steel and gear processing and manufacturing method | |
| CN103131933B (en) | Preparation method of high-speed steel | |
| CN106761421B (en) | A kind of protecting against shock drilling tool and its manufacture craft | |
| CN104084589B (en) | A kind of powder metallurgy automobile hub-bearing unit | |
| CN105908075A (en) | Casting technology of alloy steel bearing block | |
| CN102896320A (en) | Warm-pressing process of powder metallurgy | |
| CN103128122A (en) | Seamless steel tube hole forming pin in composite structure and manufacturing method thereof | |
| CN111394660B (en) | Method for strengthening surface of plug of perforating machine | |
| CN108611559A (en) | A kind of manufacturing method of middle alloy abrasion resistant steel | |
| CN103014697A (en) | Method for surface laser alloying of injection punch head | |
| CN103526127A (en) | Guide roller and manufacturing method thereof | |
| CN103725968B (en) | A kind of corrosion-resistant wire rod machine roll alloy steel material and preparation method thereof | |
| CN103557234A (en) | Manufacturing method for bearing ball | |
| CN103695789B (en) | A kind of high-performance super-hard high-speed steel | |
| CN102825424B (en) | A kind of production technology of high-performance cushion plate | |
| CN108220756A (en) | A kind of high-chromium cast iron alloy backplate | |
| CN105543597A (en) | Boring tool for hole machining | |
| CN103757547B (en) | A kind of composite roll collar cast steel material and preparation method thereof | |
| CN103741072A (en) | Antimony-contained alloy steel material for roller 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 | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: HUNAN LIANSHAO CONSTRUCTION ENGINEERING (GROUP) CO Free format text: FORMER OWNER: NINGBO SHENGYUAN TECHNOLOGY TRANSMISSION CO., LTD. Effective date: 20140304 |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 315192 NINGBO, ZHEJIANG PROVINCE TO: 417000 LOUDI, HUNAN PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20140304 Address after: 417000 Loudi City, Hunan province Louxing Xiang Yang Xi Jie (Lianshao group office building 5 floor) Patentee after: HUNAN LIANSHAO CONSTRUCTION ENGINEERING (GROUP) CO., LTD. Address before: 315192 Ningbo, Yinzhou District Zhong Gong Temple Street, Temple Road, No. 285 Patentee before: Ningbo Shengyuan Technology Transmission Co., Ltd. |
|
| TR01 | Transfer of patent right |