CN106834979A - A kind of anodic oxidation hot rolling technology of soft state aluminium alloy - Google Patents

Abstract

The present invention discloses a kind of hot rolling technology of anodic oxidation with soft state aluminium alloy, and step is as follows：（1）Soft state aluminium alloy plate ingot carries out homogenization insulation at 450 DEG C, is incubated 8 hours；（2）After homogenization, the distribution principle of drafts such as take carries out open rolling at 410~430 DEG C；（3）Be hot-rolled down to plate ingot temperature for 350~370 DEG C when, first carry out the small pressure rolling that reduction ratio is 7%, then carry out being rolled under the superpressure that reduction ratio is 45%；（4）By step（3）After treatment, the distribution principle of drafts such as continue to take rolled, by finishing temperature control at 235~250 DEG C.Using the method for the present invention, can make the mach formed product ability of common single chassis hot rolling that the effect of multi-frame continuous hot-rolling mill is fully achieved, the invention practicality extensively, is produced and control difficulty and low cost, and product competitiveness in the market is obvious, remarkable in economical benefits.

Description

A kind of anodic oxidation hot rolling technology of soft state aluminium alloy

Technical field

The invention belongs to aluminium alloy manufacture field, and in particular to a kind of anodic oxidation hot rolling technology of soft state aluminium alloy.

Background technology

1090 aluminium alloys of anodic oxidation, belong to international with commercial-purity aluminium at present（Aluminium purity is >=99.90%, is not surpassed typically Cross 99.93%）It is base material, is widely used in the alloy product of the highest ranking in illumination and decoration field, by its use state, and It is divided into the soft state of anodic oxidation（State containing medium-soft）With hard state product, its Anodic Oxidation is with 1090 soft states for product and anodic oxidation （State containing medium-soft）Product, 1090 reflectors are used so that Mingguang City's type is reflective（The country is also referred to as reflection shield）Be represent, product with high brightness, With the characteristics of forming ability high, it is widely used in indoor and outdoor and field is shone in traffic；And anodic oxidation is with 1090 hard state products, then with 1090 mirror boards are representative（1085 mirror boards that Germany's peace aluminium is used, are that Ti contents control model beyond BSEN 573-3-2009 Product after enclosing, its mother metal aluminium purity ＞ 99.90%, so the category of 1090 aluminium alloys is included in the industry）, product has Quality characteristic of the high brightness without shading, is widely used in the fields such as high-end traffic, decoration, indoor and outdoor lighting.It is domestic at present to hand over The alloy product in logical illumination and decoration field, concentrates on the grade aluminium alloys such as 1070 and 1050,1060 of low and middle-end, and reflecting rate exists 60~70%, the processing method of such product, except DC（Hot rolling）Outside processing mode, or even also CC（Casting is rolled）Roll The method production of system, the disorderly competition of the missing and domestic market of this core technology not only result in domestic enterprise's exploitation The investment risk of 1090 high-end anodic oxidation materials is raised, while also causing China to develop the paces of anodic oxidation product high-endization Stagnation.

The anodic oxidation specific processing technology of 1090 aluminium alloys, is slightly different with the difference of its product purpose, but, Its technological process requirement for finally having to pass through anodic oxidation and essentially identical product quality demand, determine that anodic oxidation is used The typical technology path of 1090 alloy products is as follows：

1）, the anodic oxidation aluminium alloy typical technology route of hard state 1090

The anodic oxidation aluminium alloy of hard state 1090, its main work flow is needed by the casting of plate ingot, the sawing of plate ingot and milling face, plate Ingot is homogenized and hot-working, the cold working of plate ingot, the cleaning of sheet material thick material, sheet material intermediate heat-treatment, sheet material mirror finish, sheet material straightening With trimming, sheet material cleaning and overlay film, sheet material anodic oxidation, ten key links are waited.But for technical difficulty, before mirror finish The four processes such as the casting of plate ingot, the hot-working of plate ingot, the cold working of plate ingot and intermediate heat-treatment, be the core technology institute of whole industry , also, this four processes also has the internal relation of mutual check and balance, specifically, the hard state of anodic oxidation The typical technology route of 1090 products is as follows：

Casting → → plate ingot the sawing of plate ingot and milling face → → plate ingot homogenization → → hot rolling → → cold rolling → → intermediate annealing → → Minute surface rolling → → straightening trimming → → cleaning overlay film → → anodic oxidation → → finished product

2）, the anodic oxidation aluminium alloy typical technology route of soft state 1090

The anodic oxidation alloy product of soft state 1090, because there is notable difference with hard state product in purposes usage, so in processing A certain degree of difference is there is also in flow, most typical work flow is mainly included：The casting of plate ingot, the sawing of plate ingot and milling face, Plate ingot is homogenized opens plate, plate stamping shaping, anodic oxygen with hot-working, the cold working of plate ingot, coiled material cleaning, coil annealing, coiled material The nine big links such as change, the technological core of whole industry still concentrates on the casting of plate ingot, plate ingot homogenization and hot-working, plate ingot table Several core links such as face treatment, specifically, anodic oxidation is as follows with the typical technology route of the alloy product of soft state 1090：

Casting → → plate ingot the sawing of plate ingot and milling face → → plate ingot homogenization → → hot rolling → → cold rolling → → cleaning → → annealing → → open plate → → punching press（Or spinning）Shaping → → anodic oxidation → → finished product.

1090 alloy products of anodic oxidation, are respectively reflecting rates high with two very clear and definite technical indicators （It is referred to as brightness in the industry, while being characterized with mutually contradictory specular reflectivity and diffusing reflection rate）It is anti-without influence with after anodic oxidation The shading of optical uniformity.The factor of reflecting rate is influenceed, the oxidation after plate ingot grain size, plate ingot aluminium purity, oxidation is concentrated mainly on Five aspects such as the interface state control of film uniformity and dense degree, woollen surface uniformity and uniformity and mirror finish； And influence the principal element of shading defect, then when concentrating on surface with interface uniformity, woollen surface cleaning and mirror finish Three aspects such as interface state control accuracy, and interface state control accuracy during mirror finish concentrates on absolute draft again Amount control, plate form control and lubricating status control, these three influence each other and mutually in the technical indicator of balance.

Based on exemplary process flow by anodic oxidation with 1090 products, the principal element of product quality is influenceed Following aspects：

1）Plate ingot casts

1090 aluminium alloys belong to commercial-purity aluminium series of products, it is necessary to solve the aluminium purity control for mutually liquidating simultaneously when plate ingot casts System controls two key problems with grain size.Aluminium Pureness control is exactly that casting process cleans control, to prevent other as far as possible Constituent element is introduced as principle and carries out process cleans control, and plate ingot grain size is controlled, and must reach the water product of one-level, and objective Need substantial amounts of grain refiner to participate in plate ingot in sight to cast, and, product finally needs to carry out the product manufacturing of anodic oxidation Feature, causes grain refiner while grain size control is participated in again, the B element in strict control panel ingot, so that can only The weaker poor B grain refiners of selection grain refining effect, so as to client is upper to need to increase the usage amount of grain refiner again To ensure plate ingot grain size number, cause the increase of the content of Ti, aluminium purity is reduced again in turn, so as to need aluminium purity more Fine aluminum liquid high come enter andante ingot casting（1090 U.S. sub- aluminium alloys of Hong Kong of most significant end in the world, be exactly using price very Expensive aluminium purity is that 99.95% industrial rafifinal casts 1090 aluminium alloy plate ingots, domestic then do not develop completely on an equal basis The plate ingot of quality level）, sum it up, core technology of this product in terms of casting, is how to the greatest extent may be used using aluminium purity The low aluminium liquid of energy, by technology controlling and process and balance, obtains the 1090 aluminium alloy plate ingots that grain size is one-level, so as to low cost Commercial-purity aluminium（99.90%）Carry out cast sheet ingot, and reach foreign countries to use industrial rafifinal（99.95%）The quality water of cast sheet ingot It is flat.

2）Hot-working and cold worked surface control with interface uniformity and spatter property

1090 alloy product anodic oxidation purposes surfaces and the realization of interface particular/special requirement, are by hot-working work and cold working Realize that this requirement is needed by arc length with based on method in theory, and interface is realized with hot-working with interface hereditary effect in surface Uniformly turn to target design hot rolling technology, surface conformance as technological design core realized with cold working, and by hot-working with Cold worked technological balance, completes interface and Surface uniformization and uniformity, and the such as U.S. Asia industry of external colleague by heat The multi-frame continuous hot-rolling mill of manufacturing procedure（Malaysian U.S. Asia industry is " 1+3 " continuous hot-rolling mill）To realize this special process work( Energy.

3）High-elongation demand and sheet material organizational controls（Heat treatment）

The interface uniformity of rafifinal system product derives from structural homogenity, but pure lines product high in casting because of aluminium purity very Height, need to strictly control the use of grain refiner during casting, the structural homogenity of high pure lines product is most rambunctious.Anodic oxygen Change with the organizational controls core of 1090 alloy products, concentrate on plate ingot grain size control, hot worked tissue reformation and timeliness, Cold worked Interface Control and finished product recrystallization annealing aspect, and this completes hot worked plate ingot homogenizing annealing process and Core content in terms of the design of hot finish to gauge aging temp and cold rolling finished product annealing process and balance.

The content of the invention

The purpose of the present invention is that the hot rolling technology in being produced with soft state aluminium alloy to existing anodic oxidation is improved, with state Interior common single chassis hot-rolling mill production meets the product of anodized demand, and ensures that the forming ability of product reaches completely To the formed product ability of multi-frame continuous hot-rolling mill.

In order to solve the above-mentioned technical problem, the invention provides following technical scheme：

A kind of anodic oxidation hot rolling technology of soft state aluminium alloy, step is as follows：

（1）Soft state aluminium alloy plate ingot carries out homogenization insulation at 450 DEG C, is incubated 8 hours；

（2）After homogenization, the distribution principle of drafts such as take carries out open rolling at 410~430 DEG C；

（3）Be hot-rolled down to plate ingot temperature for 350~370 DEG C when, first carry out the small pressure rolling that reduction ratio is 7%, then carry out Reduction ratio be 45% superpressure under roll；

（4）By step（3）After treatment, the distribution principle of drafts such as continue to take rolled, finishing temperature control is existed 235~250 DEG C.

Preferably, hot rolling is carried out using unit heating milling train.

The inventive method is simple, and domestic common single chassis hot-rolling mill can meet technique needs, it is adaptable to big batch Metaplasia is produced, and low production cost efficiency high, product disclosure satisfy that the anodized demand of various product, the forming ability of product The formed product ability of multi-frame continuous hot-rolling mill is fully achieved, the invention practicality extensively, is produced and control difficulty and low cost, Product competitiveness in the market is obvious, remarkable in economical benefits.The inventive method is applied to 1090（It is equally applicable to 1070,1080,1085 Aluminium alloy etc.）The low- medium- high level anodic oxidation hot hot-working field of Aluminum Plate and Strip.

Specific embodiment

The preferred embodiments of the present invention are illustrated below, it will be appreciated that preferred embodiment described herein is only used In the description and interpretation present invention, it is not intended to limit the present invention.

The anodic oxidation aluminium alloy of embodiment 1（Soft state）The hot rolling of product

Equipment of hot rolling is using domestic common single chassis hot-rolling mill.First to the aluminium alloy plate ingot of soft state 1090（Purity 99.90%）Carry out 450 DEG C of low temperature homogenization, after insulation 8h, low temperature open rolling is carried out at 410~430 DEG C, and plate ingot is taken when rolling and waits dividing for drafts With principle, in 17 passage, plate ingot temperature is down to 350~370 DEG C, now carries out the small pressure that reduction ratio is 7%, tightly Carried out under a reduction ratio is 45% superpressure with 18 passages thereafter；The distribution principle of drafts such as then proceeding to take is carried out Controlled rolling speed during plate sheet and strip, and the 21st, 22,23 3 passes, hot rolling finishing temperature is accurately controlled In the range of 235~250 DEG C.Under this hot rolling technique so that most afterwards through the reflection shield product after anodic oxidation Brightness reaches >=90% level, specific performance contrast is as follows：

Finally it should be noted that：The preferred embodiments of the present invention are the foregoing is only, is not intended to limit the invention, although The present invention is described in detail with reference to the foregoing embodiments, for a person skilled in the art, it still can be right Technical scheme described in foregoing embodiments is modified, or carries out equivalent to which part technical characteristic.It is all Within the spirit and principles in the present invention, any modification, equivalent substitution and improvements made etc. should be included in protection of the invention Within the scope of.

Claims (2)

1. a kind of anodic oxidation hot rolling technology of soft state aluminium alloy, step is as follows：

（1）Soft state aluminium alloy plate ingot carries out homogenization insulation at 450 DEG C, is incubated 8 hours；

（2）After homogenization, the distribution principle of drafts such as take carries out open rolling at 410~430 DEG C；

（3）Be hot-rolled down to plate ingot temperature for 350~370 DEG C when, first carry out the small pressure rolling that reduction ratio is 7%, then carry out Reduction ratio be 45% superpressure under roll；

（4）By step（3）After treatment, the distribution principle of drafts such as continue to take rolled, finishing temperature control is existed 235~250 DEG C.

2. hot rolling technology according to claim 1, it is characterised in that：Hot rolling is carried out using unit heating milling train.