The continuously casting and rolling complex copper titanium zinc alloy plate method
Technical field
The present invention relates to the kirsite field, specifically, relate to a kind of polynary kirsite, the particularly continuous cast-rolling method of copper titanium Zn based alloy.
Background technology
Continuous casting and rolling has the history of decades, is mainly used in the strip material production of aluminium alloy.With simple continuous casting material, tandem rolling is compared, and continuous casting and rolling energy saving technology, consumption reduction and cost are low, the construction period short.In recent years, because magnesium alloy is good in the application prospect of many industries, so the continuous casting rolling technology of magnesium alloy grows up gradually.
Simultaneously, kirsite has a wide range of applications in building and industrial department, still, at present domestic except print, battery is with the material, also do not have the production of wide cut kirsite casting sheet material.Abroad be to take continuous casting machine to produce the kirsite slab, again through hot rolling and the cold rolling sheet material that is processed into.Do not carry out the report that continuous casting and rolling is produced kirsite.
Why the kirsite continuous casting and rolling fails grows up, and except the produce market demand factor, main cause is:
1, the kirsite fusing point is low, and about 420 ℃, and the fusing point of aluminium is 660 ℃, 650 ℃ of the fusing points of magnesium; The latent heat of solidification of kirsite is few, about 24.09 card/grams ℃, and this value is nearly 1/4 of solidified aluminum latent heat 94.6 card/grams ℃; Be 1/3.5 of the latent heat of solidification 89 card/grams of magnesium ℃; Simultaneously the specific heat of kirsite is little, is 0.092 card/gram ℃, is the less than 1/2 of the hot 0.215 card/gram of aluminum ratio ℃, 1/2.5 of magnesium specific heat 0.245 card/gram ℃.That is to say that than aluminium and magnesium much less, and cooling is very fast by melt solidifying and the heat that discharged for kirsite in temperature reduction process.
2, the density of kirsite is big, be about 7.14 gram/cubic centimetres, and aluminium density is 2.7 gram/cubic centimetres, and magnesium density is 1.74 gram/cubic centimetres, so the weight of kirsite is big, cooling is fast, and is bigger in the low-temperature space resistance of deformation.
3, the brittle zone of kirsite is more, no doubt at the easy embrittlement of low-temperature space (<100 degrees centigrade), tendency easy to crack is arranged also in the high-temperature region.
Therefore, become sheet material, Given this, provide the method for the polynary kirsite of a kind of continuous casting and rolling cheaply very necessary owing to there is the These characteristics continuous casting and rolling that fails in kirsite.
Summary of the invention
The purpose of this invention is to provide the continuously casting and rolling complex copper titanium zinc alloy plate method that a kind of cost is low, productivity ratio is high, this method comprises:
1) preparation kirsite melt with kirsite fusing and the mixed rare earth of lanthanum and cerium that adds kirsite weight 0.06%-0.08% as alloy refinement agent crystal grain thinning, and through slagging-off, exhaust purifying alloy melt;
2) continuous casting and rolling waters the cast zinc alloy melt, and cools off the kirsite melt to the casting temperature, adopts aluminium alloy continuous casting and rolling equipment to underspeed simultaneously, keeps big roll-force that kirsite is carried out continuous casting and rolling, and cast temperature is 440-480 ℃; Casting rate to keep casting plate operation 12-20 rice/minute, the casting temperature is 330-380 ℃, the rotating speed of casting roller to keep casting plate operation 12-20 rice/minute; After casting became the 8-10mm slab, warm-rolling became the sheet material of 0.7-2mm thickness, and the warm-rolling temperature is 150-300 ℃.
Further, above-mentioned kirsite is a copper titanium zinc alloy, the kirsite that preferably has following component: in percentage by weight (wt%)
Copper 0.15; Titanium 0.08; Aluminium 0.02; Surplus is a zinc.
Further, described cast temperature is 460-480 ℃.The casting temperature is 360-380 ℃.
Further, described warm-rolling temperature is preferred 180-250 ℃.
With existing continuous casting earlier, back hot rolling, cold rolling kirsite manufacture method is compared, and the method for polynary kirsite continuous casting and rolling of the present invention has with low cost, the high advantage of productivity ratio.And invest lessly, the construction period is short, is convenient to tissue production, is fit to the multipurpose kirsite market characteristics of many kinds, small lot and the business administration requirement that responds fast.
The specific embodiment
The present invention is described in detail below in conjunction with embodiment.
The continuous casting and rolling of embodiment 1 complex copper titanium zinc alloy
The kirsite composition that adopts is: (wt%)
Copper 0.15; Titanium 0.08; Aluminium 0.02; Surplus is a zinc.
Cast temperature: 470 ℃;
Continuous casting installation for casting: traditional aluminium alloy continuous casting and rolling equipment; Casting temperature: 330-360 ℃; Roll casting speed is 12 meters/minute;
Warm-rolling temperature: 150-250 ℃;
Concrete technological process is:
The continuous casting and rolling process: the kirsite melt is through after adding mixed rare earth of lanthanum and cerium purification and refinement, air-breathing for preventing, smelting temperature is controlled at 500-540 ℃, and in static stove, further degas, melt through chute to forehearth, its flow velocity should keep normal level of liquid in the stove, pass through distributor through cross gate again, the lip of flowing through, cast temperature: 470 ℃, melt is scattered in Rack uniformly, the sheet material of for example rolling 1100-1200mm width, controlling its width is 1000-1050mm, prevents that through side seal board melt from leaking, and melt enters the casting and rolling machine roll surface.At this moment, the roller internal cooling system makes melt be solidified rapidly by semisolid, reach 330-380 ℃ of scope, obtaining thickness by the casting roller is the 8-10mm slab, cool off through cooler then, by pinch roll, deflector roll transmits, become kink by explant, cooperate as the buffering of regulating between the speed that casting and back Buwen roll, at this moment enter warm-rolling through deflector roll again, the drafts according to finished product sheet material size adjustment 1-4 rolling mill is generally 30-50%, after the rolling sheet material that obtains 0.7-2.0mm, through the level(l)ing machine leveling, enter detection zone from the blanking frame, the centre can be provided with thickness of slab as required, the nondestructive detection system of template and surface quality, qualified on inspection back is rolled into coiled sheet by coiling machine, is packaged as finished product.
Wherein, the mixed rare earth of lanthanum and cerium grain refiner of 0.06%-0.08% by adding the kirsite melt weight has utilized purification, refinement and the nucleus effect of rare earth element to alloy melt, plays the crystal grain thinning good result, thereby the plasticity of alloy is improved under different temperatures, as follows:
Temperature (℃) percentage elongation (%)
20 35
100 50
150 70
When kirsite during at 100 ℃, its percentage elongation still reaches more than 50%, can roll forming.
The above embodiments just illustrate the present invention with concrete example, and it should not be construed is that protection scope of the present invention is carried out any restriction.And the people that are familiar with this technology can understand, do not breaking away under the present invention's spirit and the principle, to various equivalent variation that the present invention carried out, modification and in the text not the various improvement of description all within the protection domain of this patent.