The present invention relates to the production method that a kind of copper covers steel plate (band).
It must be noted that the strip that above complex technique can only be produced with conventional metallurgical technology is as composite.
The production method of aluminum current steel composite material is generally blast+rolling complex technique, hot rolling or cold rolling complex technique etc.Wherein, blast+rolling complex method can only the compound spiral-plate of production binary single face, can not produce the strip volume of two-sided compound and polynary compound thickness less than 4mm; And hot rolling or cold rolling complex method can only be produced strip.
Summary of the invention
The purpose of present technique is to overcome the defective of above-mentioned prior art, and the production method that provides a kind of copper to cover steel is promptly covered the technological production of copper of steel plate (band) with metal-powder rolling copper and covered steel plate (band).Copper covers steel plate (band) and is meant bimetallic plates (band) product that metallic copper powder and steel plate (band) is synthesized two kinds of metals through rolling technique one.The performances such as mechanical strength of the existing steel of this product have the property of metallic copper again.
For reaching above purpose, the present invention adopts a kind of new technology to produce aluminum steel composite plate (band), adopts following production stage:
1, raw material pre-treatment.
To composite rolling with raw material-steel plate (band), copper powders may---be rolled pre-treatment.
2, powder composite rolling.
Steel plate (band) gets into the powder milling train after operations such as uncoiling, leveling, guiding, correction.
Copper powders may gets into the powder milling train through distributing device.
Both carry out composite rolling.
In the operation of rolling, the increase of contact area is because the distortion of metal surface jut causes, and then is the distortion simultaneously of parent metal and protrusion of surface part subsequently.Along with constantly breaking of pure surface; Crackle constantly broadens and is inserted parent metal, has reduced hardenability, and two kinds of intermetallic spaces are more and more littler; The oxygen of the inside has been used up soon; Therefore pure surface has been retained, and has formed weldering nuclear along with breaking of pure surface, and bonding region is constantly expanded.Simultaneously, because under the effect of pressure, rolling up of crackle caused vacuum at intermetallic, the pure surface of metal can directly be contacted, thereby metal is combined with each other.
3, diffusion heat treatments.
Through the atomic heat diffusion process between the metal constituent element, make two metal phase counterdiffusion increase bonded area, to improve bond strength.And make the metal of work hardening realize recovery and crystallization again, and eliminate residual stress, improve plasticity, help further processing.
4, cold rolling.
Breaking down copper is covered steel plate (band) be rolling to the finished product required thickness.
5, annealing.
Make finished product reach desired mechanical property.
6, smooth.
Smooth effect following points:
(1) reaches the required thickness requirement of finished product.
(2) sealed porosity, the surface densification of realization composite.
(3) eliminate the yield point elongation that cold-strip steel annealing back exists, improve the cold-strip steel institutional framework, regulate the mechanical property of cold-strip steel.
(4) improve the glacing flatness of cold-strip steel.
(5) make the cold-strip steel surface have certain roughness.
7, slitting.
Its effect is band steel board or the band coil of strip that is cut to the band steel branch after smooth various width and substance.
8, surface treatment.
By demands of different to finished surface polish, wire drawing etc. is final handles.
9, packing.
According to demands of different finished product is packed.
Above-mentioned whole process flow is following:
Above-mentioned metal-powder rolling goods mainly are plate and band.Its operation of rolling is that metal dust is constantly carried powder to the gap of roll by distributing device, through nip pressure it is compacted into continuous base material.The base material through solidifying sintering and follow-up rolling and heat treatment, obtains qualified goods again.It follows rolling front and back powder quality invariance principle.
In sum, the present invention is on other process for producing composite material method basis of absorption and the new process of development.Metal-powder rolling both can realize that powder-powder was compound, can realize that also powder-plate is compound; Can single face compound, also can be two-sided compound; The thickness of composite bed can arbitrarily be controlled.Composite bed does not produce the short iron aluminide, fully can deformation processing.The thickness of composite plate is unrestricted.The aluminum steel of metal-powder rolling is compound to be belonged to metallurgical atom and combines.Therefore the aluminum steel joint product bond strength of this method production is high, applied widely, wide in variety.
The exploitation of metal-powder rolling Study on Technology for adopting the product that conventional production technology can not be produced or production cost is high at present, has been found out a new production outlet.Domestic blank has been filled up in the appearance of this technology, for the development of enterprise with new vitality is provided transition.
Want more information on Copper Clad Steel, Copper-steel composite plate? Click the link below to contact us.