CN107740804A - A kind of high-strength abrasion-proof type corrosion-resistant bolt - Google Patents
A kind of high-strength abrasion-proof type corrosion-resistant bolt Download PDFInfo
- Publication number
- CN107740804A CN107740804A CN201711013126.2A CN201711013126A CN107740804A CN 107740804 A CN107740804 A CN 107740804A CN 201711013126 A CN201711013126 A CN 201711013126A CN 107740804 A CN107740804 A CN 107740804A
- Authority
- CN
- China
- Prior art keywords
- parts
- high intensity
- proof type
- strength abrasion
- anticorrosive coat
- 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
- 238000005260 corrosion Methods 0.000 title claims abstract description 18
- 230000007797 corrosion Effects 0.000 title claims abstract description 16
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 22
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 12
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 claims abstract description 12
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000000203 mixture Substances 0.000 claims abstract description 11
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 6
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000010941 cobalt Substances 0.000 claims abstract description 6
- 229910017052 cobalt Inorganic materials 0.000 claims abstract description 6
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 6
- 239000011777 magnesium Substances 0.000 claims abstract description 6
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 6
- 239000011733 molybdenum Substances 0.000 claims abstract description 6
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 6
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims abstract description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 10
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 7
- 229910052748 manganese Inorganic materials 0.000 claims description 7
- 239000011572 manganese Substances 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 5
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 5
- 239000004411 aluminium Substances 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- 229910052792 caesium Inorganic materials 0.000 claims description 5
- TVFDJXOCXUVLDH-UHFFFAOYSA-N caesium atom Chemical compound [Cs] TVFDJXOCXUVLDH-UHFFFAOYSA-N 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 229910052759 nickel Inorganic materials 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 5
- 239000010703 silicon Substances 0.000 claims description 5
- 239000010936 titanium Substances 0.000 claims description 5
- 229910052719 titanium Inorganic materials 0.000 claims description 5
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 abstract description 4
- 239000000956 alloy Substances 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000002994 raw material Substances 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B33/00—Features common to bolt and nut
- F16B33/008—Corrosion preventing means
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C23/00—Alloys based on magnesium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
-
- 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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- 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
- C22C38/06—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
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
-
- 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
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Abstract
The invention discloses a kind of high-strength abrasion-proof type corrosion-resistant bolt, including：High intensity body, the screw head outer surface of the high intensity body are electroplate with wearing layer, and the screw rod outer surface of the high intensity body is electroplate with anticorrosive coat；The wearing layer includes the composition of following mass fraction：59 parts of vanadium, 26 parts of cobalt, 6 14 parts of manganese, 10 20 parts of magnesium, 35 parts of molybdenum；The anticorrosive coat is mixed by nickel powder, zinc powder and chromic acid, matched according to mass percent, the nickel powder accounts for 42 46%, the zinc powder accounts for 41 49%, surplus is chromic acid, by the above-mentioned means, the present invention, which can possess, high intensity, wear-resisting, etch-proof feature, greatly improve durable performance, service life length.
Description
Technical field
The present invention relates to a kind of fastener, more particularly to a kind of high-strength abrasion-proof type corrosion-resistant bolt.
Background technology
It is well known that bolt, the cylindrical threaded fastener of adapted nut, are by head and screw rod（With outer spiral shell
The cylinder of line）It a kind of fastener dimerous, need to coordinate with nut, the zero of through hole is carried for being fastenedly connected two
Part, with the continuous improvement of science and technology, the application market of bolt is also more next wide, and nearly all manufacturing industry is both needed to use
Bolt, therefore for the performance requirement also more and more higher of bolt, and bolt it is main or its is durable, high-strength, it is and current
The durable and high-strength performance of bolt gradually can not meet the growing demand of people.
The content of the invention
The present invention solves the technical problem of a kind of high-strength abrasion-proof type corrosion-resistant bolt is provided, can possess have it is high-strength
Spend, be wear-resisting, etch-proof feature, greatly improving durable performance, service life length.
In order to solve the above technical problems, one aspect of the present invention is：A kind of high-strength abrasion-proof type is provided to prevent
Rotten bolt, including：High intensity body, the screw head outer surface of the high intensity body are electroplate with wearing layer, the high intensity body
Screw rod outer surface be electroplate with anticorrosive coat；
The wearing layer includes the composition of following mass fraction：Vanadium 5-9 parts, cobalt 2-6 parts, manganese 6-14 parts, magnesium 10-20 parts, molybdenum 3-5
Part；
The anticorrosive coat is mixed by nickel powder, zinc powder and chromic acid, is matched according to mass percent, and the nickel powder accounts for 42-
46%, the zinc powder accounts for 41-49%, and surplus is chromic acid.
In a preferred embodiment of the present invention, the high intensity body includes the composition of following mass percent：Carbon
0.3-0.7%, silicon 1.2-1.6%, nickel 1.5-2.1%, copper 2.2-2.8%, caesium 0.2-0.6%, manganese 1.0-1.6%, aluminium 4.8-7.4%, titanium
2.4-3.6%, surplus are iron.
In a preferred embodiment of the present invention, the thickness of the wearing layer is 1.0-2.0mm.
In a preferred embodiment of the present invention, the thickness of the anticorrosive coat is 0.6-1.2mm.
The beneficial effects of the invention are as follows：A kind of high-strength abrasion-proof type corrosion-resistant bolt of the present invention, by using in high intensity sheet
Wearing layer is electroplate with the screw head of body, and has height using anticorrosive coat is electroplate with the screw rod of high intensity body so as to possess
Intensity, wear-resisting, etch-proof feature, greatly improve durable performance, service life length.
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.
Embodiment 1：
A kind of high-strength abrasion-proof type corrosion-resistant bolt, including：High intensity body, the screw head outer surface of the high intensity body are electroplate with
Wearing layer, the screw rod outer surface of the high intensity body are electroplate with anticorrosive coat；
The wearing layer includes the composition of following mass fraction：5 parts of vanadium, 6 parts of cobalt, 6 parts of manganese, 20 parts of magnesium, 3 parts of molybdenum；It is described wear-resisting
The thickness of layer is 2.0mm；
The anticorrosive coat is mixed by nickel powder, zinc powder and chromic acid, is matched according to mass percent, and the nickel powder accounts for 42%, institute
State zinc powder and account for 49%, surplus is chromic acid；The thickness of the anticorrosive coat is 0.6mm；
The high intensity body includes the composition of following mass percent：Carbon 0.7%, silicon 1.2%, nickel 2.1%, copper 2.2%, caesium
0.6%th, manganese 1.0%, aluminium 7.4%, titanium 2.4%, surplus are iron.
Embodiment 2：
A kind of high-strength abrasion-proof type corrosion-resistant bolt, including：High intensity body, the screw head outer surface of the high intensity body are electroplate with
Wearing layer, the screw rod outer surface of the high intensity body are electroplate with anticorrosive coat；
The wearing layer includes the composition of following mass fraction：9 parts of vanadium, 2 parts of cobalt, 14 parts of manganese, 10 parts of magnesium, 5 parts of molybdenum；It is described wear-resisting
The thickness of layer is 1.0mm；
The anticorrosive coat is mixed by nickel powder, zinc powder and chromic acid, is matched according to mass percent, and the nickel powder accounts for 46%, institute
State zinc powder and account for 41%, surplus is chromic acid；The thickness of the anticorrosive coat is 1.2mm；
The high intensity body includes the composition of following mass percent：Carbon 0.3%, silicon 1.6%, nickel 1.5%, copper 2.8%, caesium
0.2%th, manganese 1.6%, aluminium 4.8%, titanium 3.6%, surplus are iron.
Embodiment 3：
A kind of high-strength abrasion-proof type corrosion-resistant bolt, including：High intensity body, the screw head outer surface of the high intensity body are electroplate with
Wearing layer, the screw rod outer surface of the high intensity body are electroplate with anticorrosive coat；
The wearing layer includes the composition of following mass fraction：7 parts of vanadium, 4 parts of cobalt, 10 parts of manganese, 15 parts of magnesium, 4 parts of molybdenum；It is described wear-resisting
The thickness of layer is 1.5mm；
The anticorrosive coat is mixed by nickel powder, zinc powder and chromic acid, is matched according to mass percent, and the nickel powder accounts for 44%, institute
State zinc powder and account for 45%, surplus is chromic acid；The thickness of the anticorrosive coat is 0.9mm；
The high intensity body includes the composition of following mass percent：Carbon 0.5%, silicon 1.4%, nickel 1.8%, copper 2.5%, caesium
0.4%th, manganese 1.3%, aluminium 6.1%, titanium 3.0%, surplus are iron.
A kind of preparation method of high-strength abrasion-proof type corrosion-resistant bolt of the present invention is as follows：
（1）First each raw material of wearing layer is proportionally put into high-temperature smelting pot and is fused into resistance to grinding fluid, is then cooled into wear-resisting
Alloy；
（2）Each raw material in anticorrosive coat is proportionally put into grinder again and is well mixed, then uses microwave heating, drying
Form anti-corrosion alloy；
（3）Antifriction alloy and anti-corrosion alloy are respectively put into electroplating pool, it is electroplated to respectively high intensity body screw head and
Screw surface, that is, high-strength abrasion-proof corrosion-resistant bolt is made.
It is different from prior art, a kind of high-strength abrasion-proof type corrosion-resistant bolt of the present invention, by using in high intensity body
Be electroplate with wearing layer at screw head, and using anticorrosive coat is electroplate with the screw rod of high intensity body so as to possess have it is high-strength
Spend, be wear-resisting, etch-proof feature, greatly improving durable performance, service life length.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (4)
- A kind of 1. high-strength abrasion-proof type corrosion-resistant bolt, it is characterised in that including：High intensity body, the spiral shell of the high intensity body Head outer surface is electroplate with wearing layer, and the screw rod outer surface of the high intensity body is electroplate with anticorrosive coat；The wearing layer includes the composition of following mass fraction：Vanadium 5-9 parts, cobalt 2-6 parts, manganese 6-14 parts, magnesium 10-20 parts, molybdenum 3-5 Part；The anticorrosive coat is mixed by nickel powder, zinc powder and chromic acid, is matched according to mass percent, and the nickel powder accounts for 42- 46%, the zinc powder accounts for 41-49%, and surplus is chromic acid.
- 2. high-strength abrasion-proof type corrosion-resistant bolt according to claim 1, it is characterised in that the high intensity body is included such as The composition of lower mass percent：Carbon 0.3-0.7%, silicon 1.2-1.6%, nickel 1.5-2.1%, copper 2.2-2.8%, caesium 0.2-0.6%, manganese 1.0-1.6%, aluminium 4.8-7.4%, titanium 2.4-3.6%, surplus are iron.
- 3. high-strength abrasion-proof type corrosion-resistant bolt according to claim 1, it is characterised in that the thickness of the wearing layer is 1.0-2.0mm。
- 4. high-strength abrasion-proof type corrosion-resistant bolt according to claim 1, it is characterised in that the thickness of the anticorrosive coat is 0.6-1.2mm。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711013126.2A CN107740804A (en) | 2017-10-25 | 2017-10-25 | A kind of high-strength abrasion-proof type corrosion-resistant bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711013126.2A CN107740804A (en) | 2017-10-25 | 2017-10-25 | A kind of high-strength abrasion-proof type corrosion-resistant bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107740804A true CN107740804A (en) | 2018-02-27 |
Family
ID=61238280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711013126.2A Pending CN107740804A (en) | 2017-10-25 | 2017-10-25 | A kind of high-strength abrasion-proof type corrosion-resistant bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107740804A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110315285A (en) * | 2019-05-22 | 2019-10-11 | 苏州剑派实业有限公司 | A kind of preparation method of automobile high-strength wearable fastener |
| CN111720405A (en) * | 2020-06-04 | 2020-09-29 | 河南航天精工制造有限公司 | Bolt and self-locking nut assembly |
| CN111853026A (en) * | 2020-08-22 | 2020-10-30 | 湖南海斯特材料科技有限公司 | Wear-resisting bolt of high life |
| CN112171201A (en) * | 2020-09-27 | 2021-01-05 | 温州市春泰标准件有限公司 | Processing technology of high-strength bolt for bulldozer or excavator track |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201973038U (en) * | 2011-03-03 | 2011-09-14 | 马汉堡 | Alloying element bolt |
| US20130170922A1 (en) * | 2010-04-20 | 2013-07-04 | Nord-Lock Ab | Method and a plant for washer production and a washer |
| CN104497807A (en) * | 2014-12-22 | 2015-04-08 | 常熟市董浜镇徐市盛峰液压配件厂 | Hydraulic bolt |
| CN205136328U (en) * | 2015-11-19 | 2016-04-06 | 上海申光高强度螺栓有限公司 | Zinc -nickel oozes layer preserved handle to be connected vicely |
| CN206072067U (en) * | 2016-08-30 | 2017-04-05 | 长沙勤凯机电科技有限公司 | A kind of chute bolt attachment structure |
| CN107041147A (en) * | 2014-02-04 | 2017-08-11 | Vdm金属国际有限公司 | The nickel chromium iron titanium-aluminium alloy of hardening with excellent abrasive resistance, creep resistant, corrosion resistance and machinability |
-
2017
- 2017-10-25 CN CN201711013126.2A patent/CN107740804A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130170922A1 (en) * | 2010-04-20 | 2013-07-04 | Nord-Lock Ab | Method and a plant for washer production and a washer |
| CN201973038U (en) * | 2011-03-03 | 2011-09-14 | 马汉堡 | Alloying element bolt |
| CN107041147A (en) * | 2014-02-04 | 2017-08-11 | Vdm金属国际有限公司 | The nickel chromium iron titanium-aluminium alloy of hardening with excellent abrasive resistance, creep resistant, corrosion resistance and machinability |
| CN104497807A (en) * | 2014-12-22 | 2015-04-08 | 常熟市董浜镇徐市盛峰液压配件厂 | Hydraulic bolt |
| CN205136328U (en) * | 2015-11-19 | 2016-04-06 | 上海申光高强度螺栓有限公司 | Zinc -nickel oozes layer preserved handle to be connected vicely |
| CN206072067U (en) * | 2016-08-30 | 2017-04-05 | 长沙勤凯机电科技有限公司 | A kind of chute bolt attachment structure |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110315285A (en) * | 2019-05-22 | 2019-10-11 | 苏州剑派实业有限公司 | A kind of preparation method of automobile high-strength wearable fastener |
| CN111720405A (en) * | 2020-06-04 | 2020-09-29 | 河南航天精工制造有限公司 | Bolt and self-locking nut assembly |
| CN111853026A (en) * | 2020-08-22 | 2020-10-30 | 湖南海斯特材料科技有限公司 | Wear-resisting bolt of high life |
| CN112171201A (en) * | 2020-09-27 | 2021-01-05 | 温州市春泰标准件有限公司 | Processing technology of high-strength bolt for bulldozer or excavator track |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180227 |
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| RJ01 | Rejection of invention patent application after publication |