CN1205346C

CN1205346C - Zn-Al-Cu-Mg alloy wire and its preparing process

Info

Publication number: CN1205346C
Application number: CN 02111557
Authority: CN
Inventors: 戴国水
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-04-29
Filing date: 2002-04-29
Publication date: 2005-06-08
Anticipated expiration: 2022-04-29
Also published as: CN1386876A

Abstract

The present invention relates to a zinc-aluminum-copper-magnesium alloy wire and a preparation method thereof, which belongs to the technical field of the preparation of zinc-base alloy materials sprayed on the end surfaces of metallic film capacitors in discrete devices of electric appliances. The alloy wire contains zinc, aluminum, copper, magnesium, etc. The alloy wire is characterized in that the composition of each constituent measured by weight percentage is respectively 3 to 5% of aluminum (Al), 2 to 4% of copper (Cu) and 0.001 to 0.1% of magnesium (Ma), and the rest is zinc (Zn) and impurities with the weight percent not larger than 0.05%. In the preparation method, firstly, molten lead in a molten state is poured in molten zinc in a molten state, temperature is raised, copper wires with the required weight are added after aluminum is melted, the copper wires are stirred sufficiently, aluminum-magnesium intermediate alloy with the required weight is added after copper is melted, an extruded stock is formed by casting and is extruded into a thick line stock, and the aluminum-zinc-copper-magnesium alloy wire is formed by drawing for a plurality of times. The present invention solves the problem that welding flux contains lead and has ideal welding performance and electric mechanical performance. The present invention can be used as base materials for manufacturing capacitors which adapt to high-temperature environment work at 125 DEG C.

Description

Zn-Al-Cu-Mg alloy wire

Technical field

The present invention relates to a kind of unleaded Zn-Al-Cu-Mg alloy wire and preparation method thereof, belong to the Zn-base alloy preparing technical field that is used for the spraying of electrical equipment discrete device metallic film capacitor end face.

Background technology

The metallize material of the metallic film capacitor end face that has been widely used, typical in five yuan of gold spraying materials of lead base, the composition of its each component is by weight percentage: Sn37-39%, Zn 3-6%, Sb 0.5-1.5%, Bi 0.1-0.5%, all the other are Pb, though these leaded five yuan of gold spraying materials have good end face sticking power, superior welding property, fusing point low (solidus curve is 145 ℃, and liquidus line is 240 ℃), 1KH, 10KH high-frequency test loss angle is little, but its lead tolerance is up to 53-59.4%, and lead has intensive toxicity to human body, and is plumbous in case be absorbed by the body, just gather and to excrete naturally in vivo, if the lead concentration in the blood of human body surpasses 10 μ g/dl, will cause the people in desperately, in addition, plumbous gathering easily causes the children's intelligence decline, and leaded waste also can contaminated soil and water source.

Simultaneously, continuous development along with film capacitor itself, also higher requirement is proposed gold spraying material, as maximum operating temperature to film capacitor, be generally 85 ℃, higher requirement is 105 ℃ now, and the requirement of 125 ℃ of working temperatures has also proposed, and metallic substance is under the condition of high temperature, resistance can sharply increase, conductivity descends, and to film capacitor, gently then causes loss angle to increase, heavy then cause line out of service, and five yuan of gold spraying materials of traditional lead base, solidus curve only is 145 ℃, may not adapt to the requirement of 125 ℃ of working temperatures of electrical condenser.And for example to the test request of electrical condenser, from 1KH, 10KH test, bring up to the high-frequency test of 100KH, the electrical condenser that uses conventional five yuan of lead base gold spraying materials to make, 100KH test value are just desirable not to the utmost.In addition, to the requirement of welding strength, existing five yuan of intensity of gold spraying material of lead base own are no more than 50N/mm ², be directly connected to the capacitor lead wire welding reliability, still keep stable wire bonds effect after promptly bearing mechanical vibration and impacting, really reach the technical requirements of electrical condenser gilding layer.

Summary of the invention

The purpose of this invention is to provide a kind of Zn-Al-Cu-Mg alloy wire that comparatively ideal welding property and electricapparatus performance are arranged and preparation method thereof.

The present invention is a Zn-Al-Cu-Mg alloy wire, include zinc, aluminium, copper, magnesium etc. is characterized in that the composition of each component is respectively by weight percentage: aluminium (Al) 3.9～4.3%, copper (Cu) 2.5～3%, magnesium (Mg) 0.004～0.01%, all the other are that zinc (Zn) and total amount are not more than 0.05% impurity.

The composition of each component can be respectively by weight percentage in the described impurity: iron (Fe)＜0.01%, silicon (Si)＜0.01%, plumbous (Pb)＜0.004%, cadmium (Cd)＜0.002%, tin (Sn)＜0.001%.

The preparation method of Zn-Al-Cu-Mg alloy wire of the present invention is: earlier the aluminium liquid of molten state is poured in the zinc liquid of molten state, or in the zinc liquid of molten state, add block aluminium, intensification is dissolved the copper wire that the back adds required weight with aluminium, fully stir the magnalium master alloy for the treatment of to add again after the copper ablation finishes required weight, be cast into extrusion billet after fully stirring fusion, be squeezed into the thick line base then and dial into Zn-Al-Cu-Mg alloy wire through repeatedly drawing.

The solidus temperature of described Zn-Al-Cu-Mg alloy wire can be 330 ℃, and liquidus temperature can be 342～348 ℃.

The pouring temperature of described Zn-Al-Cu-Mg alloy is 450 ℃～550 ℃.

The present invention is used for the capacitor end surface gold spraying material, compares with five yuan of gold spraying materials of existing lead base, has following outstanding advantage and positively effect:

1, unleaded, thus nontoxic, solved five yuan of plumbiferous problems of gold spraying material of existing lead base;

2,100KH measures, the percent of pass height;

3, its solidus temperature is 330 ℃, can be used as the base mateiral of making the electrical condenser that adapts to 125 ℃ of hot environment work;

4, contain copper, make that copper in the capacitor lead wire is not meltable to be gone out, weldability is good;

5, contain magnesium as reinforcer, tensile strength reaches 330N/mm ², for the high reliability of wire bonds provides the matrix strength basis.

Embodiment

Embodiment 1: the composition of each component is respectively by weight percentage: Al 3-4%, and Cu 2-3%, Mg 0.001-0.04%, all the other are Zn.

Embodiment 2: the composition of each component is respectively by weight percentage: Al 4-5%, and Cu 3-4%,, Mg 0.04-0.1%, all the other are Zn.

Should earlier the aluminium liquid of molten state be poured in the zinc liquid of molten state by the proportioning of the various embodiments described above during melting, or in the zinc liquid of molten state, add block aluminium, intensification is dissolved the copper wire that the back adds required weight with aluminium, fully stirs the magnalium master alloy for the treatment of to add again after the copper ablation finishes required weight.The solidus temperature of Zn-Al-Cu-Mg alloy wire is 330 ℃, and liquidus temperature is 342～348 ℃, and pouring temperature is 500 ℃.Should control total impurities＜0.05% when stirring fusion, wherein Fe＜0.01%, Si＜0.01%, Pb＜0.004%, Cd＜0.002%, Sn＜0.001%.Stir and be cast into cross section, garden extrusion billet earlier after fusion finishes, be squeezed into the thick line base again.The thick line base should be drawn into Zn-Al-Cu-Mg alloy wire again after solutionizing is handled before wire drawing.

With the Zn-Al-Cu-Mg alloy wire of the various embodiments described above preparations after tested, every performance index are listed as follows:

Embodiment	Al (％)	Cu (％)	Mg (％)	Zn (％)	Impurity		Solidus curve (℃)	Liquidus line (℃)	Mechanical property
					Impurity				Mechanical property		Fe (％)	Si (％)	Bb N/ mm ²	δ 100 ％
					1	3～4			2～3	0.001～0.04	Fe (％)	Si (％)	Bb N/ mm ²	δ 100 ％	Surplus	＜ 0.01	＜ 0.01	300	342	330	30
2	4～5	3～4	0.04～0.1	348	1	3～4	360		2～3	0.001～0.04									342	330

Claims

1. a Zn-Al-Cu-Mg alloy wire includes zinc, aluminium, copper, magnesium is characterized in that the composition of each component is respectively by weight percentage: aluminium (Al) 3.9～4.3%, copper (Cu) 2.5～3%, magnesium (Mg) 0.004～0.01%, all the other are not more than 0.05% impurity for zinc and total amount.

2. by the described Zn-Al-Cu-Mg alloy wire of claim 1, the composition that it is characterized in that each component in the described impurity is respectively by weight percentage: iron (Fe)＜0.01%, silicon (Si)＜0.01%, plumbous (Pb)＜0.004%, cadmium (Cd)＜0.002%, tin (Sn)＜0.001%.