CN106119709A - Screw connector of high-temp resistance and anti-deformation and preparation method thereof - Google Patents
Screw connector of high-temp resistance and anti-deformation and preparation method thereof Download PDFInfo
- Publication number
- CN106119709A CN106119709A CN201610549122.5A CN201610549122A CN106119709A CN 106119709 A CN106119709 A CN 106119709A CN 201610549122 A CN201610549122 A CN 201610549122A CN 106119709 A CN106119709 A CN 106119709A
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- refining
- slag modifier
- furnace
- deformation
- screw connector
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-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/06—Permanent moulds for shaped castings
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/076—Use of slags or fluxes as treating agents
-
- 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
- C21D9/0093—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for screws; for bolts
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
-
- 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
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
-
- 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
- C22C38/10—Ferrous alloys, e.g. steel alloys containing cobalt
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
-
- C—CHEMISTRY; METALLURGY
- 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
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/34—Anodisation of metals or alloys not provided for in groups C25D11/04 - C25D11/32
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Nonmetallic Welding Materials (AREA)
Abstract
The invention discloses the screw connector of a kind of high-temp resistance and anti-deformation, it is characterized in that, including following parts by weight of component: magnesium 4.55 5.65, manganese 1.25 1.3, chromium 2.1 2.2, carbon 1.22 1.35, vanadium 0.4 0.45, titanium 0.02 0.06, tungsten 0.15 0.20, molybdenum 0.6 0.9, niobium 0.4 0.6, cobalt 0.03 0.05, scandium 0.02 0.05, cadmium 0.002 0.006, slag modifier for refining 20 25, surplus is ferrum and inevitable impurity；Described slag modifier for refining is composed of the following raw materials by weight: bauxite 20 45, marble 15 25, quartz sand 19 44, barium 5 10, active lime 10 11, fluorgypsum 9 10, silicon powder 48, electric smelting magnesium powder 67, albite 5 10, aluminum shot 25.The present invention adds trace alloying element, improves alloy resistance to elevated temperatures and anti-deformation nature, and improves hardness and texture at outer wall processing ceramic layer.
Description
Technical field
The present invention relates to machine components manufacture field, particularly relate to screw connector and the system thereof of a kind of high-temp resistance and anti-deformation
Preparation Method.
Background technology
Nut is exactly nut, is threaded together the part for playing the role of fastening, all manufacturing machines with bolt or screw rod
Tool must a kind of element according to the difference of material, be divided into several big types such as carbon steel, rustless steel, non-ferrous metal (such as copper).Example
As: self-locking nut, stop nut, locking nut, four paws nut, nut, nut, screw-in nut lock nut, thin bar screw are even
Connected nut self-locking hexagonal acorn nut, special fot screw nut, hexagonal crown thin nut, eyenut.Embedded annular knurl
The main operating type of copper nut is injection, is embedded into inside working of plastics or direct mold injection, if using mould after heating
Tool injection, the fusing point of PA/NYLOY/PET is all at 200 ° of more than C, and after inserted num is entered plastic by hot melt, temperature uprises rapidly, note
After molded, the rapid crystallisation by cooling of plastic body is hardening, if inserted num temperature is also in high temperature, that is possible to down to copper spiral shell
Female place contacted with working of plastics starts to get loose or crack occur.So all using the spiral shell of copper material in the injection of inserted num
Mother rather than carbon steel nut.
The intensity of nut and service life and the founding materials of bolt, and the various trace alloying elements in founding materials
The inseparable relation that has of quantity, the constituent that the Steel material that traditional bolt is used exists alloying element is mixed and disorderly,
Due effect can not be played, and traditional method for making steel there is also defect, cause the impurity in molten steel to be difficult to remove, affect spiral shell
Female many-sided mechanical performance, the especially using method of slag modifier for refining molten steel is improper, Chinese patent slag modifier for refining molten steel:
Application number: indicate a kind of slag modifier for refining molten steel in the patent document of 00107235.8, it contain (weight %): CaO20～
45%, Al2O320～45%, in metal Al, Si, Ca, Ba, Re one or more 5～15%, CaF24～6%, SiO2≤10%,
MgO≤10%.This slag modifier for refining can have the structure of fritting solid solution.The molten steel processed with this slag modifier for refining contains very
Low sulfur, oxygen and field trash, but to there is composition kind few for the slag modifier for refining in file, and preparation method is simple, it is difficult to reach
To preferable effect, and method is single, does not point out the scheme being combined with each other with other processing methods, does not the most point out simultaneously
Its follow-up machine casting and the complete supporting technology scheme of processing technique, herein in conjunction with prior art, provide raising nut whole
The complete machining technique of body mechanical performance.
Summary of the invention
The object of the invention is contemplated to make up the defect of prior art, it is provided that a kind of trace alloying element that adds, raising is closed
Gold resistance to elevated temperatures and anti-deformation nature, and the nut of the high-temp resistance and anti-deformation of hardness and texture is improved at outer wall processing ceramic layer
Connector and preparation method thereof.
The present invention is achieved by the following technical solutions:
The screw connector of a kind of high-temp resistance and anti-deformation, it is characterised in that include following parts by weight of component: magnesium 4.55-5.65, manganese
1.25-1.3, chromium 2.1-2.2, carbon 1.22-1.35, vanadium 0.4-0.45, titanium 0.02-0.06, tungsten 0.15-0.20, molybdenum 0.6-0.9,
Niobium 0.4-0.6, cobalt 0.03-0.05, scandium 0.02-0.05, cadmium 0.002-0.006, slag modifier for refining 20-25, surplus is ferrum and not
Evitable impurity；Described slag modifier for refining is composed of the following raw materials by weight: bauxite 20-45, marble 15-25, quartz
Sand 19-44, barium 5-10, active lime 10-11, fluorgypsum 9-10, silicon powder 4-8, electric smelting magnesium powder 6-7, albite 5-10, aluminum shot
2-5；The preparation method of described slag modifier for refining is: by bauxite, marble, silicon powder, electric smelting magnesium powder, quartz sand, barium, activity
Calx, fluorgypsum, albite, aluminum shot add appropriate water mixing, then make spherical, are then placed in shaft furnace making fuel with coke pre-
Molten, prefusing temperature is 1400-1500 DEG C, is stirred for uniformly, and liquid slag quickly cools down through liquid nitrogen again, places in ball mill and grinds
Grinds powder and get final product.
The preparation method of the screw connector of described high-temp resistance and anti-deformation, it is characterised in that comprise the following steps:
(1) by raw material magnesium by weight, manganese, chromium, carbon, vanadium, titanium, tungsten, molybdenum, niobium, cobalt, scandium, every putting into preheating furnace with ferrum, will be molten
Refining raw material preheating carries out melting to putting into after 250 DEG C-350 DEG C in induction furnace, control temperature at 1500-1600 DEG C；
(2) steadily stirring when furnace charge melts about about 90%, forbid being involved in molten metal surface scum, every heat exists
Fusion process carries out the stirring of 2-5 furnace bottom, melt agitated uniformly after sample immediately, carry out on-the-spot sample analysis, probe temperature is not
According to the result of sample analysis, desulfurization, deoxidation must be carried out less than 1400 DEG C, add part slag modifier for refining and carry out once essence
Refining, rear interval are added remaining slag modifier for refining again and carry out double refining after 30-35 minute, it is thus achieved that molten steel；
(3) being put into by swage in fuse kiln and heat, carry out moulding the most one by one, control temperature, at 200-230 DEG C, utilizes low pressure
Fluidised form precoated sand is blown into die cavity by 0.4-0.5MPa compressed air, covers uniformly, molten steel is poured into casting in swage and forms nut
Connector blank；
(4) screw connector blank is heated to 400-450 DEG C, keeps 3-4 hour, then be warming up in 30-40 minute
750-800 DEG C, carry out quenching with quenching oil cold, but, then the screw connector after quenching is tempered at 380-400 DEG C
35-45 minute, then from tempering furnace, take out cooling in the tempering oil putting into 280-300 DEG C, the nut after heat treatment is connected
Part carries out turnery processing, it is thus achieved that finished product；
(5) finished product is carried out sandblasting, increase surface roughness, then use alkali liquor defat, after purification, utilize differential arc oxidization technique to be formed
Ceramic of compact crystal layer, at ceramic coated coating, places into 200-240 DEG C and is sintered 15-16 minute filling with alloy-layer
Divide and merge, form ceramic layer, to obtain final product.
The present invention add on the basis of high-carbon steel magnesium, manganese, chromium, carbon, vanadium, titanium, tungsten, molybdenum, niobium, cobalt, scandium, every etc. trace close
Gold element, adds wearability and corrosion resistance, and the interpolation that with the addition of the element such as tungsten, molybdenum maintains enough hardness, and carries
High ability of anti-deformation, the present invention uses slag modifier for refining to be used for the melting of molten steel, and the impurity in molten steel can be made to lower further,
Improve the purity of molten steel, take out oxide inclusion, by repeatedly refine and sample analysis technology, strictly control the quality of molten steel,
And the present invention uses swage to cover husky technique, firm performance transition magnesium iron graphitization expansion direction in process of setting of swage, by
Outer expansion becomes inward expansion, it is achieved that graphitization expansion is from feeding head-free casting；Thin owing to covering layer of sand, die cavity is the most variable
Shape, causes the precision of foundry goods to greatly improve；The existence covering layer of sand improves the service life of foundry goods, reduces production cost；This
Invent and cast post-processing temperature by conservative control, improve the mechanical performance of foundry goods, and use differential arc oxidization technique to form fine and close pottery
Porcelain crystal layer, improves hardness and the texture on nut surface.
Detailed description of the invention
The screw connector of a kind of high-temp resistance and anti-deformation, it is characterised in that include following parts by weight of component: magnesium 4.55-
5.65, manganese 1.25-1.3, chromium 2.1-2.2, carbon 1.22-1.35, vanadium 0.4-0.45, titanium 0.02-0.06, tungsten 0.15-0.20, molybdenum
0.6-0.9, niobium 0.4-0.6, cobalt 0.03-0.05, scandium 0.02-0.05, cadmium 0.002-0.006, slag modifier for refining 20-25, surplus
For ferrum and inevitable impurity；Described slag modifier for refining is composed of the following raw materials by weight: bauxite 20-45, marble 15-
25, quartz sand 19-44, barium 5-10, active lime 10-11, fluorgypsum 9-10, silicon powder 4-8, electric smelting magnesium powder 6-7, albite 5-
10, aluminum shot 2-5；The preparation method of described slag modifier for refining is: by bauxite, marble, silicon powder, electric smelting magnesium powder, quartz sand,
Barium, active lime, fluorgypsum, albite, aluminum shot add appropriate water mixing, then make spherical, are then placed in shaft furnace using coke
Making fuel fritting, prefusing temperature is 1400-1500 DEG C, is stirred for uniformly, and liquid slag quickly cools down through liquid nitrogen again, places into ball
Grinding machine is ground into powder and get final product.
The preparation method of the screw connector of described high-temp resistance and anti-deformation, it is characterised in that comprise the following steps:
(1) by raw material magnesium by weight, manganese, chromium, carbon, vanadium, titanium, tungsten, molybdenum, niobium, cobalt, scandium, every putting into preheating furnace with ferrum, will be molten
Refining raw material preheating carries out melting to putting into after 250 DEG C-350 DEG C in induction furnace, control temperature at 1500-1600 DEG C；
(2) steadily stirring when furnace charge melts about about 90%, forbid being involved in molten metal surface scum, every heat exists
Fusion process carries out the stirring of 2-5 furnace bottom, melt agitated uniformly after sample immediately, carry out on-the-spot sample analysis, probe temperature is not
According to the result of sample analysis, desulfurization, deoxidation must be carried out less than 1400 DEG C, add part slag modifier for refining and carry out once essence
Refining, rear interval are added remaining slag modifier for refining again and carry out double refining after 30-35 minute, it is thus achieved that molten steel；
(3) being put into by swage in fuse kiln and heat, carry out moulding the most one by one, control temperature, at 200-230 DEG C, utilizes low pressure
Fluidised form precoated sand is blown into die cavity by 0.4-0.5MPa compressed air, covers uniformly, molten steel is poured into casting in swage and forms nut
Connector blank；
(4) screw connector blank is heated to 400-450 DEG C, keeps 3-4 hour, then be warming up in 30-40 minute
750-800 DEG C, carry out quenching with quenching oil cold, but, then the screw connector after quenching is tempered at 380-400 DEG C
35-45 minute, then from tempering furnace, take out cooling in the tempering oil putting into 280-300 DEG C, the nut after heat treatment is connected
Part carries out turnery processing, it is thus achieved that finished product；
(5) finished product is carried out sandblasting, increase surface roughness, then use alkali liquor defat, after purification, utilize differential arc oxidization technique to be formed
Ceramic of compact crystal layer, at ceramic coated coating, places into 200-240 DEG C and is sintered 15-16 minute filling with alloy-layer
Divide and merge, form ceramic layer, to obtain final product.
Claims (2)
1. the screw connector of a high-temp resistance and anti-deformation, it is characterised in that include following parts by weight of component: magnesium 4.55-5.65,
Cobalt 0.03-0.05, scandium 0.02-0.05, chromium 2.1-2.2, carbon 1.22-1.35, vanadium 0.4-0.45, titanium 0.02-0.06, tungsten 0.15-
0.20, molybdenum 0.6-0.9, niobium 0.4-0.6, cadmium 0.002-0.006, manganese 1.25-1.3, slag modifier for refining 20-25, surplus be ferrum and
Inevitably impurity；Described slag modifier for refining is composed of the following raw materials by weight: bauxite 20-45, marble 15-25, stone
Sand 19-44, barium 5-10, active lime 10-11, fluorgypsum 9-10, silicon powder 4-8, electric smelting magnesium powder 6-7, albite 5-10, aluminum
Ball 2-5；The preparation method of described slag modifier for refining is: by bauxite, marble, silicon powder, electric smelting magnesium powder, quartz sand, barium, work
Property Calx, fluorgypsum, albite, aluminum shot add appropriate water mixing, then make spherical, be then placed in shaft furnace making fuel with coke
Fritting, prefusing temperature is 1400-1500 DEG C, is stirred for uniformly, and liquid slag quickly cools down through liquid nitrogen again, places in ball mill
It is ground into powder and get final product.
2. the preparation method of the screw connector of high-temp resistance and anti-deformation as claimed in claim 1, it is characterised in that include following step
Rapid:
(1) by raw material magnesium by weight, manganese, chromium, carbon, vanadium, titanium, tungsten, molybdenum, niobium, cobalt, scandium, every putting into preheating furnace with ferrum, will be molten
Refining raw material preheating carries out melting to putting into after 250 DEG C-350 DEG C in induction furnace, control temperature at 1500-1600 DEG C；
(2) steadily stirring when furnace charge melts about about 90%, forbid being involved in molten metal surface scum, every heat exists
Fusion process carries out the stirring of 2-5 furnace bottom, melt agitated uniformly after sample immediately, carry out on-the-spot sample analysis, probe temperature is not
According to the result of sample analysis, desulfurization, deoxidation must be carried out less than 1400 DEG C, add part slag modifier for refining and carry out once essence
Refining, rear interval are added remaining slag modifier for refining again and carry out double refining after 30-35 minute, it is thus achieved that molten steel；
(3) being put into by swage in fuse kiln and heat, carry out moulding the most one by one, control temperature, at 200-230 DEG C, utilizes low pressure
Fluidised form precoated sand is blown into die cavity by 0.4-0.5MPa compressed air, covers uniformly, molten steel is poured into casting in swage and forms nut
Connector blank；
(4) screw connector blank is heated to 400-450 DEG C, keeps 3-4 hour, then be warming up in 30-40 minute
750-800 DEG C, carry out quenching with quenching oil cold, but, then the screw connector after quenching is tempered at 380-400 DEG C
35-45 minute, then from tempering furnace, take out cooling in the tempering oil putting into 280-300 DEG C, the nut after heat treatment is connected
Part carries out turnery processing, it is thus achieved that finished product；
(5) finished product is carried out sandblasting, increase surface roughness, then use alkali liquor defat, after purification, utilize differential arc oxidization technique to be formed
Ceramic of compact crystal layer, at ceramic coated coating, places into 200-240 DEG C and is sintered 15-16 minute filling with alloy-layer
Divide and merge, form ceramic layer, to obtain final product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610549122.5A CN106119709A (en) | 2016-07-13 | 2016-07-13 | Screw connector of high-temp resistance and anti-deformation and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610549122.5A CN106119709A (en) | 2016-07-13 | 2016-07-13 | Screw connector of high-temp resistance and anti-deformation and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106119709A true CN106119709A (en) | 2016-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610549122.5A Pending CN106119709A (en) | 2016-07-13 | 2016-07-13 | Screw connector of high-temp resistance and anti-deformation and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106636926A (en) * | 2017-01-06 | 2017-05-10 | 芜湖市金贸流体科技股份有限公司 | Corrosion and discoloration resisting alloy nut connecting piece and preparation method thereof |
| CN112359192A (en) * | 2020-10-26 | 2021-02-12 | 太仓太标汽车部件有限公司 | Heat treatment process of high-strength corrosion-resistant bolt |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105239023A (en) * | 2015-11-18 | 2016-01-13 | 钢铁研究总院 | High-temperature acid chloride ion corrosion resistant steel plate and manufacturing method thereof |
| CN105603297A (en) * | 2016-01-13 | 2016-05-25 | 铜陵百荣新型材料铸件有限公司 | Preparation method of high-strength and corrosion-resistant low-carbon steel |
-
2016
- 2016-07-13 CN CN201610549122.5A patent/CN106119709A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105239023A (en) * | 2015-11-18 | 2016-01-13 | 钢铁研究总院 | High-temperature acid chloride ion corrosion resistant steel plate and manufacturing method thereof |
| CN105603297A (en) * | 2016-01-13 | 2016-05-25 | 铜陵百荣新型材料铸件有限公司 | Preparation method of high-strength and corrosion-resistant low-carbon steel |
Non-Patent Citations (1)
| Title |
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| 魏超主编: "《液体火箭发动机特种制造技术》", 31 October 2014, 北京：中国宇航出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106636926A (en) * | 2017-01-06 | 2017-05-10 | 芜湖市金贸流体科技股份有限公司 | Corrosion and discoloration resisting alloy nut connecting piece and preparation method thereof |
| CN112359192A (en) * | 2020-10-26 | 2021-02-12 | 太仓太标汽车部件有限公司 | Heat treatment process of high-strength corrosion-resistant bolt |
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