CN105316506A - Preparation method of improving performances of ZL310 alloy - Google Patents

Abstract

The invention discloses a preparation method of improving performances of ZL310 alloy, which includes the steps of pre-heating a graphite crucible in a well-type resistance furnace until the crucible is in a dark-red color, adding aluminum ingots which has been pre-heated to 120 DEG C into the graphite crucible, spraying a RF-2 flux and increasing the temperature, when the aluminum is molten, press-adding magnesium blocks at 680-690 DEG C by means of a pure titanium bell jar, stirring the alloy melt fully with a graphite rod, performing slagging-off at 730 DEG C, purifying the melt with a C2Cl6 refining agent after the alloy is fully molten, and finally allowing the alloy melt to stand for 6-8 min and performing casting.

Description

Improve the preparation method of ZL301 alloy property

Technical field

The present invention relates to a kind of preparation technology, particularly a kind of preparation method improving ZL301 alloy property.

Background technology

Aluminium alloy is a kind of younger metallic substance, just starts industrial application in 20 beginnings of the century.World War II, aluminium is mainly for the manufacture of military aircraft.After the war, because the demand of war industry to aluminium die-offs, aluminum i ndustry circle just starts to develop civil aluminum alloy, make its range of application expand to each department of national economies such as construction industry, container package industry, transportation, electric power and electronic industry, machinery manufacturing industry and petrochemical complex by aircraft industry, be applied in the middle of daily life.Now, more than the consumption of aluminium, scope is wide, is only second to iron and steel, becomes second largest metallic substance.

1, high strength cast aluminum alloys and wrought aluminium alloy

General cast aluminium alloy comprises AlSi system, AlCu system, AlMg system and AlZn system 4 series, wherein the highest with the intensity of AlCu system and AlZn line aluminium alloy, but majority is between 200Mpa ~ 300Mpa, higher than a few trade mark only having AlCu system of 400Mpa, but because adopting refined aluminium matrix and adding noble element, manufacturing cost is very high; The resistance toheat of AlZn system casting alloy is very poor.Therefore, general cast aluminium alloy makes its range of application be subject to larger restriction because obdurability is slightly inferior compared with wrought aluminium alloy.Many important use such as extraordinary traction engine bogie wheel, aviation alloyed aluminium etc. adopt wrought aluminium alloy more, instead of cast aluminium alloy.Wrought aluminium alloy decreases defect by means such as extruding, rolling, forgings, and refinement crystal grain, improves density, thus have very high intensity, excellent toughness and good use properties.But require high to process equipment mould, operation is many, therefore the wrought aluminium alloy production cycle is long, cost is very high.Compared with wrought aluminium alloy, cast aluminium alloy have cheap, organize isotropy, special tissue can be obtained, be easy to produce complex-shaped part, small serial production the plurality of advantages such as also can to produce in enormous quantities.Therefore, developing can the high-toughness casting aluminum alloy material of Substitute For Partial wrought aluminium alloy and casting forming process thereof, the object that can reach casting and forging, shorten the manufacturing cycle, reduce manufacturing cost, has important theory significance and great actual application value.

In the evolution of high-toughness casting aluminum alloy, the A-U5GT that succeeds in developing in 20 beginnings of the century of France occupies an important position, in high-toughness casting aluminum alloy representative at present its history at most, be most widely used.The trade mark that China is not corresponding with it at present.

2, high temperature aluminium alloys

Superalloy is also known as heat-resistance high-strength alloy, the strong alloy of heat or superalloy, it is a kind of important meals material grown up along with the appearance of aero-turbine in the forties in 20th century, larger working load can be born for a long time under high temperature oxidative atmosphere and exhaust gas corrosion condition, being mainly used in the hot-end component of internal combustion turbine, is the important feature material of aerospace, naval vessel, generating, petrochemical complex and communications and transportation industry.Wherein some alloy also can be used for biotechnology and makes orthopaedics and dental material.

Conventional superalloy comprises Ni-based, iron-based and cobalt base alloy, can work under 600 ~ 1100 DEG C of hot environments; Heat-resisting aluminium alloy grows up during being then cold war.Heat-resistance high-strength aluminium alloy is suitable for bearing larger working load for a long time in the thermal environment below 400 DEG C, is more and more applied in fields such as aerospace, heavy industry machineries.Except the parts that aero-turbine, internal combustion turbine etc. directly contact with high-temperature fuel gas, all the other High Temperature High Pressure strong power parts all can adopt heat-resistance high-strength aluminium alloy to cast.

Because aluminium alloy ratio is easier to processing, along with the raising of processing technology level, when intensity meets the demands, people adopt wrought aluminium alloy to substitute cast aluminium alloy more and more.Therefore heat-resistance high-strength aluminium alloy is divided into again Ajax alloy and the large class of distortion alloy two.

And there is the heat-resistance high-strength wrought aluminium alloy of extensive use and pole the bright outlook in national economy and the modernization of national defense and development, report less in domestic and foreign literature, known 2219, 2A02, 2A04, 2A06, 2A10, 2A11, 2A12, 2A14, 2A16, 2A17, 2A50, 2A70, the 7XXX system wrought aluminium alloies such as 2XXX system wrought aluminium alloy and 7A04 such as 2A80, more than 250 DEG C, at temperature, intensity majority is less than 100Mpa, and its main alloy element is except Cu, outside Mn, all with Si, Mg, Zn is as main micro alloying element, and do not add this several element, and intensity is not reported at the heat-resistance high-strength wrought aluminium alloy material of more than 150Mpa at more than 250 DEG C temperature.

3, the Metamorphism treatment of aluminium alloy

The high-qualityization process of melt is the core link of aluminium alloy smelting and pursues a goal, and is the basis and the prerequisite that obtain fine aluminum alloy material simultaneously.High-qualityization process mainly comprises two aspects: one is sublimate, and two is structural unit refinement and homogenizing.The former mainly takes the method for an impurity solid state filtering and " with gas degasification " to reduce melt impurity and hydrogen richness, and technological process can produce waste residue and waste gas; The latter is commonly referred to Metamorphism treatment, make the elementary cell of formation aluminium alloy melt and sosoloid with additive or machinery, physical method the size of--xln--becomes little as far as possible, distribution is even as far as possible, because additive enters alloy melt, become the effective ingredient of alloy, thus do not produce waste residue and waste gas in process.Metamorphism treatment particularly uses efficient alterant to be the fundamental means adjusting aluminium alloy as-cast structure.And preparation technology's alloy character of alloy has great effect, then technology is when preparing alloy now, and the alloy property obtained is all not fully up to expectations.

Summary of the invention

The technical problem to be solved in the present invention is to provide a kind of preparation method improving ZL301 alloy property, is preparing Problems existing in alloy to solve present technology.

Technical scheme of the present invention: the preparation method improving ZL301 alloy property,

Plumbago crucible is positioned over preheating garnet in well formula resistance furnace, adds the aluminium ingot being preheating to 120 DEG C, sprinkle RF-2 type flux and then heat up, MAG block is pressed in 680 ~ 690 DEG C with pure titanium bell jar after aluminium fusing, and fully stir aluminium alloy with graphite rod, skim at 730 DEG C, after it fully dissolves, use C ₂cl ₆refining agent carries out purifying treatment to melt, then leaves standstill and casts after 6-8 minute.

Described pouring temperature 710 DEG C, die temperature 220 DEG C.

Beneficial effect of the present invention: the alloy prepared by present method can obtain excellent performance in reasonable offer,

Now in technique add MAG block again by after aluminium ingot melting, so mainly to the consideration of the saving of container, and carry out skimming in melting process and can make the abundant melting of raw material.

Specific embodiment

Tested alloys melting is raw materials used is: commercial-purity aluminium, pure magnesium.Tested alloys adopts 19# plumbago crucible to carry out melting in well-type electric furnace, and steel casting mould carries out the preparation of casting sample.In fusion process, first open well formula resistance furnace, plumbago crucible is positioned over preheating garnet in well formula resistance furnace, add the aluminium ingot being preheating to 120 DEG C, sprinkle RF-2 type flux (carnallitite type insulating covering agent) then to heat up, after aluminium fusing, be pressed into MAG block in 680 ~ 690 DEG C with pure titanium bell jar, and fully stir aluminium alloy with graphite rod, 730 DEG C skim (pulling aluminium liquid surface alumina oxide disintegrating slag out with pure titanium strainer), after it fully dissolves, use C ₂c _l6refining agent carries out purifying treatment to melt, then leaves standstill and casts after 6-8 minute.Pouring temperature 710 DEG C, die temperature 220 DEG C.

Claims (2)

1. improve the preparation method of ZL301 alloy property, it is characterized in that:

Plumbago crucible is positioned over preheating garnet in well formula resistance furnace, adds the aluminium ingot being preheating to 120 DEG C, sprinkle RF-2 type flux and then heat up, MAG block is pressed in 680 ~ 690 DEG C with pure titanium bell jar after aluminium fusing, and fully stir aluminium alloy with graphite rod, skim at 730 DEG C, after it fully dissolves, use C ₂cl ₆refining agent carries out purifying treatment to melt, then leaves standstill and casts after 6-8 minute.

2. want the preparation method of the improvement ZL301 alloy property described in 1 according to right, it is characterized in that: pouring temperature 710 DEG C, die temperature 220 DEG C.