CN109023160A - A kind of FeCoMo amorphous magnet and production method - Google Patents

A kind of FeCoMo amorphous magnet and production method Download PDF

Info

Publication number
CN109023160A
CN109023160A CN201710435235.7A CN201710435235A CN109023160A CN 109023160 A CN109023160 A CN 109023160A CN 201710435235 A CN201710435235 A CN 201710435235A CN 109023160 A CN109023160 A CN 109023160A
Authority
CN
China
Prior art keywords
fecomo
amorphous
magnet
ball milling
acid
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
Application number
CN201710435235.7A
Other languages
Chinese (zh)
Inventor
刘志红
Original Assignee
刘志红
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 刘志红 filed Critical 刘志红
Priority to CN201710435235.7A priority Critical patent/CN109023160A/en
Publication of CN109023160A publication Critical patent/CN109023160A/en
Pending legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C45/00Amorphous alloys
    • C22C45/02Amorphous alloys with iron as the major constituent
    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25DPROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D3/00Electroplating: Baths therefor
    • C25D3/02Electroplating: Baths therefor from solutions
    • C25D3/56Electroplating: Baths therefor from solutions of alloys
    • C25D3/562Electroplating: Baths therefor from solutions of alloys containing more than 50% by weight of iron or nickel or cobalt
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/14Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
    • H01F1/147Alloys characterised by their composition
    • H01F1/153Amorphous metallic alloys, e.g. glassy metals
    • H01F1/15308Amorphous metallic alloys, e.g. glassy metals based on Fe/Ni
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/14Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
    • H01F1/147Alloys characterised by their composition
    • H01F1/153Amorphous metallic alloys, e.g. glassy metals
    • H01F1/15341Preparation processes therefor
    • H01F1/1535Preparation processes therefor by powder metallurgy, e.g. spark erosion
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/14Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
    • H01F1/147Alloys characterised by their composition
    • H01F1/153Amorphous metallic alloys, e.g. glassy metals
    • H01F1/15358Making agglomerates therefrom, e.g. by pressing
    • H01F1/15366Making agglomerates therefrom, e.g. by pressing using a binder
    • H01F1/15375Making agglomerates therefrom, e.g. by pressing using a binder using polymers
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties

Abstract

A kind of FeCoMo amorphous magnet and production method, the ingredient of FeCoMo amorphous powder are as follows: Fe65-85wt %, Co8-25%wt, Mo5-20 %wt, FeCoMo alloy powder are non crystalline structure.FeCoMo amorphous magnet production method is the following steps are included: (1) metal substrate is plated the pretreatment on surface;(2) Brush Plating prepares FeCoMo amorphous alloy coating;(3) amorphous alloy coating is made to fall off using method mechanically or physically;(4) ball milling of Amorphous Alloy Grain;(5) FeCoMo magnet is prepared using mull technique.

Description

A kind of FeCoMo amorphous magnet and production method
Technical field
The present invention relates to a kind of magnet and production methods, more particularly, to a kind of FeCoMo amorphous alloy magnet and producer Method.
Background technique
Permanent magnet is extensively in the every field such as dry electronics, electrical, mechanical, transport, medical treatment and daily necessity.Such as loudspeaking The permanent magnet of device, telephone receiver;The magnetic system of magnetoelectricity series ammeter;Magnetic pole in generator, magneto;Machine-building institute With permanent magnet devices (permanent magnetic chuck of such as surface grinding machine) and magnetic suspension system, magnetic bearing;Magnetic separation system, magnetic concentration, Magnetic water purification system, the magnetic system of magnetron, proton precessional magnetometer.And electronic component is to miniaturization, high frequency and high current side To development, and the requirement to the Electro Magnetic Compatibility of electronic equipment is also higher and higher, traditional alloy permanent-magnet material, soft magnet Oxysome and metal magnetic powder core etc. are unable to meet demand, using being restricted.
Non crystalline structure has the structure of longrange disorder, shortrange order, and powder is made to have many unique performances.Amorphous is magnetic Powder can satisfy various electronic component stabilisations, miniaturization, high frequency, high current, height due to its excellent soft magnet performance The demand of power can be greatly facilitated the development of the hi-tech industries such as automobile, electronics, aerospace field.
Fe-based amorphous alloy powder, which removes, has excellent magnetic property, also has the performances such as resistance to exhaust gas corrosion, wear-resisting, anti-corrosion, It is used widely in electronics, coating and hard alloy.And some special occasions put forward higher requirements powder property.
Up to the present, the preparation process of amorphous powdered alloy mainly has water fog method, aeroponics and uses amorphous thin ribbon The technique of broken powder processed.Water fog method has big cooling rate, can meet the requirement for preparing amorphous powder.However, in water mist During change, powder obtained easily forms oxide, and oxygen content is high, furthermore upon solidification of the molten metal, the vapor of generation It can be covered on the surface of molten metal, the core metal intensity of cooling that the presence of the vapor film will lead to melting reduces, thus Prevent the problem of powder central part is from obtaining amorphous structure, influences device performance.Aeroponics are since intensity of cooling is limited, only The strong amorphous powdered alloy of amorphous formation ability, and high production cost can be prepared.The advantages of direct crush method, is to material Selectivity is not strong, and stock utilization is high, but brittle annealing need to be carried out to amorphous thin ribbon, it is easy to since annealing unevenness causes strip Internal crystallization change it is uneven, and be easy to produce the powder particle with acute angle after broken, be the following process of powder Bring difficulty.
And compared with liquisol quenching method, sputtering method prepare amorphous alloy material, galvanoplastic are more economical, and application range is also more It is wide.The formation of Resisting Property of Brush Electroplating Coating, which is inherently made peace, to be electroplated identical, is all the metal ion in solution at cathode (workpiece) The process of upper electric discharge crystallization.But compared with plating, plated pen and workpiece have relative motion in Brush Plating, thus plated surface is not It is whole that metal ion reduction crystallization, the knot but plated surface each point sparks when plated pen is in contact with it occur simultaneously It is brilliant.Therefore, Brush Electroplating Technique has its unique distinction in process aspect, and feature can be summarized as follows:
1, equipment is simple, does not need coating bath, easy to carry, is suitable for field and field repair.Particularly with large-scale, precision equipment Scene do not disintegrate repair it is more with practical value;
2, simple process, flexible operation, the position for not needing plating not use many material protections;
3, in operating process, cathode and anode have relative motion, therefore allow using higher current density, it is used than slot plating Current density is several times greater to tens times;
4, metal ion content is high in plating solution, so it is fast (5 times~10 times faster than slot plating) to plate product speed;
5, have a plated pen of different model, and the different, insoluble anode not of uniform size equipped with shape, to various different geometries and Complicated components can all be repaired;
6, expense is low, and economic benefit is big.
Summary of the invention
In view of the above-mentioned problems, providing one kind the present invention is based on the principle that Brush Plating and mull technique prepare amorphous magnet FeCoMo amorphous magnet and production method.The ingredient of FeCoMo amorphous powder of the invention are as follows: Fe65-85wt %, Co8-25% Wt, Mo5-20 %wt, FeCoMo powder are non crystalline structure.
FeCoMo amorphous magnet of the present invention and production method, comprising the following steps:
(1) metal substrate is plated the pretreatment on surface: metal substrate, which is plated surface, can be used mechanically or chemically derusting, takes off Rouge;
(2) Brush Plating prepares FeCoMo amorphous alloy coating, electroplate liquid composition are as follows: the mixture of frerrous chloride and ferrous sulfate The preferred 2-3mol/L of 1-.5-3.5mol/L(), cobaltous sulfate or cobalt chloride 0.4-1.2 mol/L, sodium molybdate 0.2-0.6mol/L, acid 0.3-0.8mol/L, complexing agent 0.5-5g/L, reducing agent 2-10g/L, additive 2-5 g/L, excess water;
Above-mentioned acid includes the polynary middle strong acid such as boric acid, phosphoric acid, carboxylic acid;
Above-mentioned complexing agent includes tartaric acid, neopelex, lauryl sodium sulfate, citrate etc.;
Above-mentioned additive is soluble sulphate, villaumite etc.;
Technique of brush plating parameter: anode is 0.1-0.5A/mm using the inert materials such as graphite, the current density of electrode2(preferably 0.2-0.4A/mm2), electrode speed of related movement is the preferred 5-10m/min of 2-12m/min(), titration strong acid solution makes plating solution Ph For value less than 3, plating temperature is 30-65 DEG C,;
(3) using method mechanically or physically, as the methods of rolling reductions, alternating bending, scraping make amorphous alloy coating fall off;
(4) amorphous particle of peeling is carried out ball milling by the ball milling of Amorphous Alloy Grain under the conditions of vacuum or inert gas shielding, Ball milling method uses ball milling 3-10min, stops the mode of this interval circulation of 3-12min, or using with the ball for forcing cooling effect Mill mode, ball milling total time are 1-10h, and ball material mass ratio is 3-8:1;
(5) FeCoMo magnet is prepared using mull technique
Using thermosetting plastics as binder, ratio 2-5%wt selects silanes, titanate ester as coupling agent, ratio For 0.1-0.5%wt, pressing pressure 500-900MPa, 150-250 DEG C of solidification temperature, curing time 0.5-2h.
(6) surface treatment of magnet
Carry out the polishing and surface spraying of magnet surface.
Compared with prior art, the invention has the following advantages that
1. compared with aeroponics and direct crush method, this technique few, simple process with equipment investment, to FeCoMo amorphous alloy Forming ability is of less demanding;
2. powder will not lead to the problem of oxidation and partial amorphization compared with water fog method;
3., due to the influence without considering coating surface quality and liberation of hydrogen, can be adopted compared with Brush Plating prepares amorphous alloy coating With bigger current density, speed of production is improved;
4. liberation of hydrogen for this method, can make to produce biggish internal stress and more porous, coating brittleness increasing in coating Greatly, it is easy to fall off, also improves the efficiency of ball mill crushing;
5., due to having relative motion between two electrode of Brush Plating, being electroplated compared with galvanoplastic+crush method prepares amorphous powdered alloy method Liquid is also flow regime, therefore, the concentration polarization problem of generation is not electroplated, relatively bigger current density can be used, mention The production efficiency of high powder;
6. this method can match the amorphous formation ability of material without considering by adjusting the concentration of each main component of electroplate liquid Than can get the amorphous powdered alloy of different constituent elements compositions and ratio, therefore, the applicability of this method is more extensive, can operate Property is stronger, can meet the performance requirement of different occasions.
Specific embodiment
The invention will be further described with reference to embodiments.
The preparation of 1 Fe74Co15Mo11 amorphous magnet of embodiment
The ingredient of FeCoMo amorphous powder of the invention are as follows: Fe74wt %, Co15%wt, Mo11%wt, Fe74Co15Mo11 alloy Powder is non crystalline structure.
FeCoMo amorphous magnet of the present invention and production method, comprising the following steps:
(1) using copper plate as metal substrate, using chemical method except embroidery, degreasing;
(2) Brush Plating prepares FeCoMo amorphous alloy coating, electroplate liquid composition are as follows: frerrous chloride 0.7mol/L, ferrous sulfate 1.5 Mol/L, cobaltous sulfate 0.7mol/L, 0.5 mol/L of sodium molybdate, 0.4 mol/L of boric acid, 2 g/L of sodium citrate, tartaric acid 0.5g/ L, 3 g/L of potassium iodide, 2 g/L of potassium sulfate, sodium chloride 1g/L, excess water;
Technique of brush plating parameter: anode is 0.3A/mm using the inert materials such as graphite, the current density of electrode2, electrode is opposite to be transported Dynamic speed is 5 m/min, and titration strong acid solution makes plating solution Ph value 2, and plating temperature is 60 DEG C;
(3) amorphous alloy coating is made to fall off using the method for alternating bending;
(4) amorphous particle of peeling is carried out ball milling by the ball milling of Amorphous Alloy Grain under the conditions of vacuum or inert gas shielding, Ball milling method uses ball milling 5min, stops this interval iterative cycles mode of 10min, and ball milling total time is 3 h, and ball material mass ratio is 5:1;
(5) FeCoMo magnet is prepared using mull technique
Using epoxy resin as binder, ratio 2.5%wt, silane coupling agent 0.25%wt, pressing pressure 800MPa, 200 DEG C of solidification temperature, curing time 0.5h;
(6) surface treatment of magnet
Carry out the polishing and surface spraying of magnet surface.
The preparation of 2 Fe70Co16Mo14 amorphous magnet of embodiment
The ingredient of FeCoMo amorphous powder of the invention are as follows: Fe70 % wt, Co16%wt, Mo14 %wt, Fe70Co16Mo14 conjunction Bronze end is non crystalline structure.
FeCoMo amorphous magnet of the present invention and production method, comprising the following steps:
(1) copper plate is as metal substrate, and substrate surface is using chemical method derusting, degreasing;
(2) Brush Plating prepares FeCoMo amorphous alloy coating, electroplate liquid composition are as follows: frerrous chloride 0.5mol/L, ferrous sulfate 2 Mol/L, cobaltous sulfate 0.8mol/L, 0.8 mol/L of sodium molybdate, 0.4 mol/L of boric acid, 3 g/L of sodium citrate, 0.5 g/ of tartaric acid L, 2 g/L of potassium iodide, 1.5 g/L of potassium sulfate, sodium chloride 1g/L, excess water;
Technique of brush plating parameter: anode is 0.2A/mm using the inert materials such as graphite, the current density of electrode2, electrode is opposite to be transported Dynamic speed is 8 m/min, and titration strong acid solution makes plating solution Ph value 2, and plating temperature is 50 DEG C;
(3) using method mechanically or physically, as the methods of rolling reductions, alternating bending, scraping make amorphous alloy coating fall off;
(4) amorphous particle of peeling is carried out ball milling by the ball milling of Amorphous Alloy Grain under the conditions of vacuum or inert gas shielding, Ball milling method uses ball milling 3-10min, stops this interval iterative cycles mode of 3-12min, and ball milling total time is 3h, ball material quality Than for 4:1;
(5) FeCoMo magnet is prepared using mull technique
Using epoxy resin as binder, ratio 3%wt, silane coupling agent 0.2%wt, pressing pressure 600MPa, Gu Change 150 DEG C of temperature, curing time 0.5h;
(6) surface treatment of magnet
Carry out the polishing and surface spraying of magnet surface.

Claims (5)

1. a kind of FeCoMo amorphous magnet and production method, which is characterized in that the ingredient of FeCoMo amorphous powder are as follows: Fe65- 85wt %, Co8-25%wt, Mo5-20 %wt, FeCoMo alloy powder are non crystalline structure.
2. a kind of FeCoMo amorphous magnet production method, which is characterized in that production method is the following steps are included: (1) metal substrate The pretreatment on plated surface;(2) Brush Plating prepares FeCoMo amorphous alloy coating;(3) made using method mechanically or physically non- Peritectic alloy coating falls off;(4) ball milling of Amorphous Alloy Grain;(5) FeCoMo magnet is prepared using mull technique;(6) table of magnet Face polishing and surface spraying.
3. as claimed in claim 2, the electroplate liquid composition of Brush Plating are as follows: the mixture 1-.5- of frerrous chloride and ferrous sulfate The preferred 2-3mol/L of 3.5mol/L(), cobaltous sulfate or cobalt chloride 0.4-1.2 mol/L, sodium molybdate 0.2-0.6mol/L, acid 0.3- 0.8mol/L, complexing agent 0.5-5g/L, reducing agent 2-10g/L, additive 2-5 g/L, excess water;
Above-mentioned acid includes the polynary middle strong acid such as boric acid, phosphoric acid, carboxylic acid;
Above-mentioned complexing agent includes tartaric acid, neopelex, lauryl sodium sulfate, citrate etc.;
Above-mentioned additive is soluble sulphate, villaumite etc..
4. as claimed in claim 2, the technological parameter of Brush Plating are as follows: anode is close using inert materials, the electric currents of electrode such as graphite Degree is 0.1-0.5A/mm2(preferably 0.2-0.4A/mm2), electrode speed of related movement is the preferred 5-10m/min of 2-12m/min(), Titration strong acid solution makes plating solution Ph value less than 3, and plating temperature is 30-65 DEG C.
5. as claimed in claim 2, the ball milling of Amorphous Alloy Grain, which is characterized in that ball milling method uses ball milling 3-10min, Stop the mode of this interval circulation of 3-12min, or using with the ball milling method for forcing cooling effect, ball milling total time is 1-10h, Ball material mass ratio is 3-8:1.
CN201710435235.7A 2017-06-10 2017-06-10 A kind of FeCoMo amorphous magnet and production method Pending CN109023160A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710435235.7A CN109023160A (en) 2017-06-10 2017-06-10 A kind of FeCoMo amorphous magnet and production method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710435235.7A CN109023160A (en) 2017-06-10 2017-06-10 A kind of FeCoMo amorphous magnet and production method

Publications (1)

Publication Number Publication Date
CN109023160A true CN109023160A (en) 2018-12-18

Family

ID=64628928

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710435235.7A Pending CN109023160A (en) 2017-06-10 2017-06-10 A kind of FeCoMo amorphous magnet and production method

Country Status (1)

Country Link
CN (1) CN109023160A (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005017223A1 (en) * 2003-08-12 2005-02-24 Ut-Battelle, Llc Bulk amorphous steels based on fe alloys
CN105119463A (en) * 2015-07-22 2015-12-02 北京顿一科技有限公司 Novel core-including linear motor, motor servo system and core preparation method
CN106757287A (en) * 2016-12-06 2017-05-31 刘志红 A kind of preparation technology of Fe Ni P base composite claddings
CN106756641A (en) * 2016-12-14 2017-05-31 刘志红 A kind of Fe based amorphous alloy powders and its preparation technology

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005017223A1 (en) * 2003-08-12 2005-02-24 Ut-Battelle, Llc Bulk amorphous steels based on fe alloys
CN105119463A (en) * 2015-07-22 2015-12-02 北京顿一科技有限公司 Novel core-including linear motor, motor servo system and core preparation method
CN106757287A (en) * 2016-12-06 2017-05-31 刘志红 A kind of preparation technology of Fe Ni P base composite claddings
CN106756641A (en) * 2016-12-14 2017-05-31 刘志红 A kind of Fe based amorphous alloy powders and its preparation technology

Similar Documents

Publication Publication Date Title
Walsh et al. A review of developments in the electrodeposition of tin-copper alloys
Wu et al. Progress of electroplating and electroless plating on magnesium alloy
CN105386089B (en) A kind of Trivalent hard chromium electroplating solution and its application in hard chrome plating
CA1072910A (en) Method of manufacturing amorphous alloy
CN100493781C (en) Method of producing sheet shaped silver-plated copper powder
CN107177872A (en) PZT amorphous alloys electroplate liquid and utilize its PZT amorphous alloy electro-plating methods
US4917778A (en) Process for the corrosion protection of neodymium-iron-boron group sintered magnets
JP4714945B2 (en) Manufacturing method of product made of magnesium or magnesium alloy
CN103668357B (en) A kind of alkaline non-cyanide high-speed plating copper electrolyte
CN106048669B (en) A kind of electroplating technology and electroplate liquid of neodymium iron boron magnetic body
EP3486925B1 (en) Ndfeb magnet with composite coating and preparation process thereof
US7449100B2 (en) Method for forming electroplating film on surfaces of articles
US7517555B2 (en) Copper plating solution and method for copper plating
CN101525711A (en) Magnesium alloy with zinc and nickel compound plating layers and preparation method thereof
CN1057631C (en) Rare-earth element/transition metal series permanent magnet having improved anticorrosion performance and manufacture thereof
TW200407465A (en) Electrolyte solution for manufacturing electrolytic copper foil and electrolytic copper foil manufacturing method using the same
KR20160113610A (en) Electroplating bath containing trivalent chromium and process for depositing chromium
CN107937879B (en) Neodymium-iron-boron magnet and surface coating method thereof
CN103173840A (en) Method for producing grinding electroplated diamond wheel
CN102758230B (en) Gold electroplating solution and gold electroplating method
CN101165220A (en) A hard gold alloy plating bath
CN106086956B (en) Alkaline non-cyanide electrodepositing zinc-nickel alloy additive and its application
CN101580941B (en) Method for preparing WC-Co hard coating
CN1838244A (en) Soft magnetic thin film and magnetic recording head
CN103469267B (en) A kind of processing method of surface-treated electro-deposited copper foil and the Copper Foil of process thereof

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
WD01 Invention patent application deemed withdrawn after publication
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20181218