CN105206351A

CN105206351A - Preparation technology of copper and aluminum combined flat wire

Info

Publication number: CN105206351A
Application number: CN201510662528.XA
Authority: CN
Inventors: 董晓文; 王连忠; 兰占军
Original assignee: YANTAI FISEND BIMETAL CO Ltd
Current assignee: YANTAI FISEND BIMETAL CO Ltd
Priority date: 2015-10-15
Filing date: 2015-10-15
Publication date: 2015-12-30

Abstract

The invention provides a preparation technology of a copper and aluminum combined flat wire. Firstly, copper and aluminum combined blanks are formed through horizontal continuous casting direct combination, and the area proportion of a wrapping copper layer is 15-50%. The preparation technology includes the following steps that firstly, rolling is performed, wherein a hole shape rolling technology is adopted, and the machining rate reaches 75-85% after rolling ends; secondly, drawing is performed, wherein drawing speed is controlled within 3-40 m/min, the thickness reduction amount of each pass is controlled to be 0.1-1.5 mm, the width reduction amount of each pass is controlled to be 0.1-2 mm, and the cross area total reduction amount is controlled to be 40-99% after drawing; thirdly, annealing is performed. The copper and aluminum combined flat wire can be prepared just through the horizontal continuous casting composite forming technology of copper and aluminum combined rod blanks, rolling, drawing and annealing, and efficient, short-process, high-yield and low-cost production of the copper and aluminum combined flat wire is achieved. The thickness of the copper layer of the copper and aluminum combined flat wire produced through the method is adjustable, the interface bonding strength is high and is larger than or equal to 40 Mpa, and a ten-thousand-ton-level industrialized production line and large-scale production of the copper and aluminum combined flat wire can be achieved through the method.

Description

A kind of preparation technology of Copper-Aluminum compound lenticular wire

Technical field

The invention belongs to double metallic composite material field, relate in particular to a kind of preparation technology of Copper-Aluminum compound lenticular wire.

Background technology

Copper-Aluminum compound lenticular wire is a kind of is matrix with aluminium, and outer evenly coated copper, forms the double metallic composite material of permanent atom metallurgical binding, surface-brightening, rounding, zero defect between copper aluminium.It is the high-quality of copper is stablized the low cost of electric conductivity and aluminium, novel conductor material that low-density is combined as a whole, can fine copper be replaced to arrange comprehensively, realize with aluminium joint copper.Its key problem in technology be shaped ensures that intermetallic combines reliably.Traditional copper aluminum composite material production technology is:

1, tube-weld cladding technique or tiretube process production of copper alclad rod base;

2, wire drawing machine carries out multi pass drawing or by carrying out multi pass drawing sizing after hydrostatic extrusion method;

3, the Copper-Aluminum compound lenticular wire after drawing sizing is put into annealing furnace and is carried out bright annealing.

But there is following shortcoming in this traditional handicraft: the above traditional copper aluminum composite material preparation method needs to prepare coating layer copper pipe and aluminium core respectively, after numerous and diverse machinery and chemical surface treatment, again by both by certain technique (as clad welded, hydrostatic extrusion, multi pass drawing etc.) be combined with each other, there is the technological process of production long, environmental pressure is large, production efficiency is low, lumber recovery is low, interface bond strength low (Cu and Al combination intensity is less than 35MPa), coated copper layer thickness is non-adjustable, be difficult to prepare the composite conductor material compared with big cross section size, be difficult to the problem such as industrialization production line and large-scale production realizing ton.

Summary of the invention

The object of the invention is for the problems referred to above; the production method of Copper-Aluminum compound lenticular wire of a kind of efficient, the high and low cost of short route, lumber recovery, high-performance, environmental protection is provided; the Copper-Aluminum compound lenticular wire that this law is obtained; production technology is simple, excellent product performance; its Cu and Al combination intensity high (interface bond strength >=40Mpa); copper layer thickness is adjustable, can realize industrialization production line and the large-scale production of ton.

Technical scheme of the present invention is achieved in that a kind of preparation technology of Copper-Aluminum compound lenticular wire, and first adopt horizontal casting direct combination shaping Copper-Aluminum compound blank, coated copper layer area ratio is 15 ~ 50%, and its preparation technology comprises the steps:

1, rolling: adopt groove rolling technique, mill speed scope is 20 ~ 80m/min, and cross section is square billet.Cogging method is: billet size is 40 ~ 50mm, flat-rolled and rolling on edge intersection are carried out, namely first and third, five, seven and nine passages are flat-rolled, the second, four, six and eight passages are rolling on edge, the single pass drafts of flat-rolled controls between 25 ~ 35%, the single pass drafts of rolling on edge controls between 15 ~ 30%, and rolling terminates aft-loaded airfoil rate and reaches 75 ~ 85%;

2, drawing: drawing speed controls to 3 ~ 40m/min, every time reduced down in thickness amount controls to 0.1 ~ 1.5mm, every time width reduction amount controls to 0.1 ~ 2mm, the total reduction of sectional area after drawing controls to 40 ~ 99%, due to the reason of work hardening, in drawing process, along with increasing of drawing passes, single pass area reduction amount declines;

3, anneal: the Copper-Aluminum compound lenticular wire after drawing being shaped is put into vacuum annealing furnace and carried out bright annealing, and annealing temperature controls to 200 ~ 350 DEG C, annealing time 1 ~ 3h.

The invention has the beneficial effects as follows: usage level continuous casting direct combination shaping Copper-Aluminum compound blank of the present invention, copper layer thickness is adjustable, forms good metallurgical binding between copper aluminium; Owing to adopting horizontal casting direct combination moulding process, avoid complicated machinery and surface treatment before the processing of copper aluminium and the oxidation on surface, Cu and Al combination place in the course of processing, and adopt groove rolling and rational drawing process, the combination between copper aluminium can be strengthened, make Copper-Aluminum compound lenticular wire any surface finish, dimensional accuracy high and there is strong interface bond strength (Cu and Al combination intensity is not less than 40Mpa).The preparation of Copper-Aluminum compound lenticular wire just can obtain merely through Copper-Aluminum compound rod base (horizontal casting composite forming technology obtains)-rolling-drawing-annealing, achieve Copper-Aluminum compound lenticular wire efficiently, short route, the high and low-cost production of lumber recovery.The Copper-Aluminum compound lenticular wire copper layer thickness that this method is produced is adjustable, and interface bond strength high (interface bond strength >=40Mpa), the present invention can realize industrialization production line and the large-scale production of Copper-Aluminum compound lenticular wire ton.

Embodiment

In order to Comprehension and Implementation better, the following detailed description of the present invention: a kind of preparation technology of Copper-Aluminum compound lenticular wire, it is a kind of processing method of double metallic composite material, Copper-Aluminum compound lenticular wire is composited by core aluminium and coating layer copper, coated layers of copper volume ratio is 30%, cogging method is: the square billet length of side is 44mm, mill speed 80m/min, groove rolling is divided into nine passages, flat-rolled and rolling on edge intersection are carried out, namely first, three, five, seven and nine passages are flat-rolled, second, four, six and eight passages are rolling on edge, the single pass reduction ratio 25% of flat-rolled, the single pass reduction ratio 15% of rolling on edge, rolling terminates the roughing achieving blank, and be conducive to follow-up drawing fine finishining,

Next step processing step is: drawing.Drawing speed is 35m/min, and the reduced down in thickness amount of first passage controls to 1.5mm, and the width reduction amount of first passage controls to 2mm, due to work hardening, in drawing process, along with increasing of drawing passes, single pass area reduction amount declines, and after drawing, the total reduction of sectional area controls to 99%;

Finishing operation is: annealing.Copper-Aluminum compound lenticular wire after drawing being shaped is put into vacuum annealing furnace and is carried out bright annealing, and annealing temperature selects 350 DEG C, annealing time 3h.

Claims

1. a preparation technology for Copper-Aluminum compound lenticular wire, first adopt horizontal casting direct combination shaping Copper-Aluminum compound blank, coated copper layer area ratio is 15 ~ 50%, it is characterized in that comprising the steps:

(1), rolling: adopt groove rolling, mill speed is 20 ~ 80m/min, and cross section is square billet; Cogging method is billet size is 40 ~ 50mm, flat-rolled and rolling on edge intersection are carried out, namely first and third, five, seven and nine passages are flat-rolled, the second, four, six and eight passages are rolling on edge, the single pass drafts of flat-rolled controls between 25 ~ 35%, the single pass drafts of rolling on edge controls between 15 ~ 30%, and rolling terminates to realize working modulus and reaches 75 ~ 85%;

(2), drawing: drawing speed controls to 3 ~ 40m/min, and every time reduced down in thickness amount controls to 0.1 ~ 1.5mm, and every time width reduction amount controls to 0.1 ~ 2mm, and the total reduction of the sectional area after drawing controls to 40 ~ 99%;

(3), anneal: the Copper-Aluminum compound lenticular wire after drawing being shaped is put into vacuum annealing furnace and carried out bright annealing, annealing temperature 200 ~ 350 DEG C, annealing time 1 ~ 3h.