CN1109133C

CN1109133C - Technology for manufacturing white dumet wire

Info

Publication number: CN1109133C
Application number: CN 99115420
Authority: CN
Inventors: 王继红
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-06-10
Filing date: 1999-06-10
Publication date: 2003-05-21
Anticipated expiration: 2019-06-10
Also published as: CN1236969A

Abstract

The present invention relates to a method for manufacturing a dumet wire, which comprises the following steps: an iron and nickel alloy bar with a constant linear expansion coefficient is selected as a core material, the surface of the iron and nickel alloy bar is cleaned by ethylene trichloride, the iron and nickel alloy bar is annealed, the anode of the iron and nickel alloy bar is etched in H2SO4 solution, the iron and nickel alloy bar is electrically plated with copper, and the iron and nickel alloy bar plated with the copper is annealed and is drawn into the wire in a cold mode; the iron and nickel alloy wire plated with the copper is put into a nickel plating groove for a nickel plating process; the three-metal compound wire plated with nickel is annealed and is drawn into various sizes of finished products, and the finished products are continuously annealed. When the method for manufacturing a dumet wire is adopted, the thickness of a nickel layer can be easily controlled, and the nickel can have good oxidation resistance. When the product of the present invention is used as an electric vacuum device and an electric leading line, the product can enhance the vacuum gas tightness of the device and the line and can also prolong the service life of the device and the line.

Description

The production method of white Dumet wire

The present invention relates to a kind of production method of electrovacuum seal, sealing materials white Dumet wire.

Dumet wire is mainly used in electron tube, semiconducter device and bulb equipment, and the lead-in wire that dispatch from foreign news agency is led in the video picture device etc.The production method of existing Dumet wire generally is to adopt the iron-nickel alloy rod with certain coefficient of expansion, becomes bimetal through multiple copper, after drawing, is coated with the borate goods on its surface again, and it is orange red to wine-colored finished product obtaining surface color.Because of this product surface is Red copper oxide and borate mixture, easily to inhale and ridicule, easy blackout be cannot say for sure pipe, simultaneously, thickness of oxide layer is wayward in production technique, too thick, the too thin sealing property that all influences itself and glass.

Task of the present invention provides a kind of method of producing white Dumet wire, is core with multiple copper iron-nickel alloy wire, three metal composites that multiple nickel, drawing form.Nickel dam substitutes Red copper oxide and borate miscellany, and surface color is silvery white.Because nickel layer thickness is easy to control, and nickel has good oxidization resistance, with white Dumet wire make electron tube, electric guide wire can improve its vacuum-tightness, its work-ing life is grown in the court of a feudal ruler.

It is as follows to finish concrete grammar of the present invention:

One, the production of multiple copper iron-nickel alloy wire core

1. the iron-nickel alloy rod of choosing the alignment coefficient of expansion is core, and the alloy of the 4J43 trade mark is comparatively desirable.

Its chemical ingredients following (%):

C	P	S	Mn	Si	Ni	Fe
C	P	S	Mn	Si	Ni	Fe	≤0.05	≤0.02	≤0.02	≤0.4	≤0.3	≤42.5～43.5	Surplus

2. before electroplating the iron-nickel alloy rod is carried out surface cleaning with trichloroethylene, in hydrogen-burning stove, anneal, 1100～1150 ℃ of annealing temperatures, soaking time 2～3 hours is then at 160-200 grams per liter H ₂SO ₄Carry out the casual erosion of anode in the solution, copper facing again, the parameter of electroplating copper-plating technique is as follows:

The copper electroplating solution prescription is that concentration is the CuSO of 210～260 grams per liters ₄5H ₂O, concentration is the H of 50～75 grams per liters ₂SO ₄Reagent is pure, and temperature is between 20～32 ℃, and voltage is 2～4 volts in the groove, and working current density is 10～11 amperes/decimeter ², the copper facing time is 4 hours 15 minutes-6 hours 15 minutes.

3. the drawing of dumet

Iron-nickel alloy rod after the copper facing is carried out anneal in hydrogen-burning stove, annealing temperature is 800～850 ℃, and soaking time was assigned to 2 hours in 1 hour 20, and then carries out cold drawn silk processing.Draw steel plating iron-nickel alloy rod on chain drawbench, being drawn into diameter is the dumet silk of φ≤4mm, and lubricant is with artificial hard oil fat.And then on vertical cylinder drawing wire machine, draw the dumet silk, be drawn into the dumet silk of diameter phi≤2mm, ravine lubrication prescription ammonia soap solution.

Two, electroplate multiple nickel

1. nickel plating pre-treatment

Before electroplating multiple nickel, the dumet silk is carried out anneal at hydrogen-burning stove, 800～850 ℃ of annealing temperatures earlier.Soaking time is to assign to 2 hours in 1 hour 20, with the soda boiling pineization of deoiling, uses hot water wash, with 1～10 second of chloroazotic acid etch, chargedly immediately after the washing puts into nickel bath nickel plating.

2. nickel plating technology

The nickel plating solution prescription

NiSO ₄7H ₂O 135 grams per liter Na ₂SO ₄10H ₂O 70-80 grams per liter

H ₃BO ₃20-30 grams per liter NaCl 5-7 grams per liter

Temperature adopts room temperature, and pH value is that 5～5.5 current densities are 0.2～2 ampere/decimeter ², time 2-3 hour.

Nickel plating mode: adopt dumet silk one circle circle is evenly hung over the rack plating method or the continuous electroplating method of electroplating electronickelling on the hook rack.

Three, the drawing of white Dumet wire:

1. three metal composite wires after the nickel plating are carried out anneal at hydrogen-burning stove earlier, 800～880 ℃ of annealing temperatures, soaking time 1 hour to 1 hour 40 minutes is carried out cold drawn silk processing then.

2. three metal composite wires are drawn, process annealing, 800～880 ℃ of annealing temperatures, soaking time 1 hour to 1 hour 40 minutes is drawn into the finished product of all size then.

3. the finished products of white Dumet wire adopts the continuous annealing furnace of hydrogen shield to carry out continuous annealing, 800～880 ℃ of annealing temperatures, 18～25 meters/minute of speed.

The iron-nickel alloy rod that embodiment chooses φ 8.0 * 1600mm is core, alloy designations 4J43

1. earlier 4J43 iron-nickel alloy rod is carried out surface cleaning with trichloroethylene, in hydrogen-burning stove, anneal, 1100 ℃ of annealing temperatures, soaking time 2 hours is then at 180 grams per liter H ₂SO ₄Carry out anodic souring in the solution.Electroplating the copper plating solution prescription is CuSO ₄5H ₂O 220 grams per liters, H ₂SO ₄(reagent is pure), 59 grams per liters, 30 ℃ of temperature, voltage is 4 volts in the groove, 10 amperes/decimeter of working current density ², 5-6 hour copper facing time.

2. the drawing of dumet

Iron-nickel alloy rod after the copper facing is carried out anneal in hydrogen-burning stove, annealing temperature is 800～850 ℃, soaking time was assigned to 2 hours in 1 hour 20, and then carry out cold drawn silk and process, on chain drawbench, draw the dumet rod, being drawn into diameter phi is the iron edge alloy silk of 3.8mm, lubricant: artificial hard oil fat.

On vertical cylinder drawing wire machine, draw the dumet silk, be drawn into the copper-beryllium silk of diameter phi 1.5mm.

3. electroplate multiple nickel

Before electroplating multiple nickel, the dumet silk is handled 800～850 ℃ of annealing temperatures at hydrogen-burning stove earlier.Soaking time is to assign to 2 hours in 1 hour 20, with the soda boiling pineization of deoiling, uses hot water wash, with 1～10 second of chloroazotic acid etch, chargedly immediately after the washing puts into nickel bath nickel plating.The nickel plating technology parameter is as follows: the nickel plating solution prescription

NiSO ₄7H ₂O 135 grams per liter Na ₂SO ₄10H ₂The O70-80 grams per liter

H ₃BO ₃20-30 grams per liter NaCl 5-7 grams per liter

Temperature adopts room temperature, and pH value is 5～5.5, and current density is 0.2～2 ampere/decimeter ², time 2-3 hour.

Nickel plating mode: adopt rack plating method or continuous electroplating method.

4, the drawing of white Dumet wire:

2. three metal composite wires are drawn, process annealing, 800～880 ℃ of annealing temperatures, Warm keeping sheet 1 hour to 1 hour 40 minutes is drawn into the finished product of all size then.

Claims

1. method of producing Dumet wire is characterized in that may further comprise the steps:

(1) produces multiple copper iron-nickel alloy wire core

1. the iron-nickel alloy rod of choosing the alignment coefficient of expansion is core, and chemical ingredients is (%): C≤0.05, P≤0.02, and S≤0.02, Mn≤0.4, Si≤0.3, Ni:42.5～43.5, surplus is Fe;

2. the iron-nickel alloy rod is carried out surface cleaning with three hydrogenation of ethylene, annealing then is again at 160-200 grams per liter H ₂S0 ₄Carry out anodic souring in the solution, electroplate copper facing then;

3. the iron-nickel alloy rod after the copper facing is carried out anneal, annealing temperature is 800～850 ℃, and soaking time was assigned to 2 hours in 1 hour 20, and then carries out cold drawn silk and be processed into the dumet silk;

(2) electroplate multiple nickel

1. will carry out cold drawn silk processing dumet silk annealing afterwards earlier, annealing temperature is 800～850 ℃, is incubated 1 hour 20 and assigns to 2 hours, with the soda boiling pineization of deoiling, use hot water wash, use the chloroazotic acid etch, chargedly immediately after the washing put into nickel bath nickel plating, the nickel plating technology parameter is as follows:

The nickel plating solution prescription

NiSO ₄7H ₂O 135 grams per liter Na ₂SO ₄10H ₂O 70-80 grams per liter

H ₃BO ₃20-30 grams per liter NaCl 5-7 grams per liter

Temperature adopts room temperature, and pH value is 5～5.5, and current density is 0.2～2 ampere/decimeter ², time 2-3 hour;

2. use rack plating method or the nickel plating of continuous electroplating method;

(3) drawing of white Dumet wire:

1. with the annealing earlier of three metal composite wires after the nickel plating, 800～880 ℃ of annealing temperatures, soaking time 1 hour to 1 hour 40 minutes;

2. three metal composite wires are drawn, process annealing, 800～880 ℃ of annealing temperatures, soaking time 1 hour to 1 hour 40 minutes is drawn into the finished product of all size then;

3. finished products adopts the continuous annealing furnace of hydrogen shield to carry out continuous annealing, 800～880 ℃ of annealing temperatures, 18～25 meters/minute of speed.

2. the method for a production Dumet wire according to claim 1 is characterized in that: the time with the chloroazotic acid etch before the nickel plating was 1～10 second.