CN104498784A - Novel aluminum-titanium alloy and preparation process thereof - Google Patents

Abstract

The invention discloses a novel aluminum-titanium alloy. The aluminum-titanium alloy comprises the following components in percentage by weight: 6.0-7.0% of silicon, 1.0-2.0% of magnesium, 0.3-0.5% of chromium, 0.15-0.35% titanium, 0.05-0.35% of zinc, 0.05-0.35% of manganese, 0.01-0.05% of tin and the balance of aluminum and inevitable impurities, wherein in the impurities, iron is less than 0.3%, copper is less than 0.03% and nickel is less than 0.02%. A preparation process comprises the following steps: calculating ingredients; adding pure aluminum; adding silicon; adding aluminum-titanium alloy, aluminum-chromium alloy and aluminum-manganese alloy; adding pure zinc and pure tin; adding pure magnesium; stirring, removing slag and carrying out chemical examination; adjusting contents of the ingredients; refining and degassing; and carrying out modification treatment. The aluminum-titanium alloy has the advantages of excellent corrosion resistance, good thermal conductivity, good plasticity and toughness and higher tensile strength, hardness and elongation and is especially suitable for die casting of products which have high requirements on corrosion resistance and thermal conductivity and complex shapes and the die-casting finished product has the characteristics of corrosion resistance, excellent heat-dissipation performance, good plasticity and excellent processing performance and is hardly breakable.

Description

A kind of novel aluminum titanium alloy and preparation technology thereof

Technical field

The present invention relates to a kind of alloy material, particularly relate to a kind of novel aluminum titanium alloy and preparation technology thereof.

Background technology

At present, domestic solidity to corrosion and thermal conductivity are required that high, complex-shaped product die casting makes primarily of magnesium alloy or Alar, although magnesium alloy can the complex-shaped product of die casting, but solidity to corrosion and heat dispersion is poor, die casting yield rate is lower, magnesium alloy processing characteristics is excellent, but solidity to corrosion and intensity low, easy fracture, the large production cost of scaling loss is high, although Alar thermal conductivity is higher but its solidity to corrosion is low and be not too applicable to the die casting of complex-shaped product than magnesium alloy, die casting yield rate is low, easy fracture.

Summary of the invention

The present invention is to solve above-mentioned deficiency, provides a kind of novel aluminum titanium alloy and preparation technology thereof.It not only has excellent solidity to corrosion and thermal conductivity, higher intensity, hardness and unit elongation, has excellent castability.Be specially adapted to die casting solidity to corrosion and thermal conductivity being required to high, complex-shaped product, die casting yield rate is high, product intensity is high, plasticity and toughness are good, not easy fracture, finished product excellent corrosion resistance heat dispersion is outstanding, processing characteristics is excellent, material cost is low, the feature that production cost is low.

Above-mentioned purpose of the present invention is realized by following technical scheme: a kind of novel aluminum titanium alloy, it is characterized in that: by weight percentage, composed of the following components: silicon 6.0 ~ 7.0%, magnesium 1.0 ~ 2.0%, chromium 0.3 ~ 0.5%, titanium 0.15 ~ 0.35%, zinc 0.05 ~ 0.35%, manganese 0.05 ~ 0.3%, tin 0.01 ~ 0.05%, in impurity, iron is less than 0.3%, copper is less than 0.03%, nickel is less than 0.02%, and all the other are aluminium and inevitable impurity.

Preferably, the Lan cerium mishmetal or be equivalent to that described aluminum titanium alloy contains 0.15% ~ 0.25% is less than the gallium phosphide of 300ppm gallium content and the vanadium of 100-250ppm with crystallization of refinement particle, and the calcium of 1-30ppm is to improve cutting ability and to be conducive to removing the hydrogen in aluminium liquid.

A preparation technology for novel aluminum titanium alloy, is characterized in that: comprise the following steps:

(1) charge calculation;

(2) fine aluminium is added: add fine aluminium fusing in a furnace according to calculating, after fusing, maintain the temperature at 700 DEG C-720 DEG C;

(3) silicon is added: add silicon fusing, after fusing, maintain the temperature at 700 DEG C-720 DEG C;

(4) add aluminium titanium, aluminium chromium, alumal: add aluminium titanium master alloy, aluminium chromium hardener, aluminium manganese master alloy melt, and maintain the temperature at 690 DEG C-710 DEG C after fusing;

(5) pure zinc, pure tin is added: add pure zinc, pure tin fusing, after fusing, maintain the temperature at 690 DEG C-710 DEG C;

(6) pure magnesium is added: add the fusing of pure magnesium, after fusing, maintain the temperature at 690 DEG C-710 DEG C;

(7) stir, remove the gred, chemically examine: stir aluminum alloy melt 5-10 minute, make uniform composition, then slagging-off, sample examination;

(8) adjusting component content: adjust each element component content until meet the requirements of scope according to result of laboratory test;

(9) refining degasification: be pressed into by refining agent bottom aluminum alloy melt, carries out refining degasification until refining agent fully reacts complete;

(10) Metamorphism treatment: maintain the temperature at 700 DEG C-720 DEG C, adds rare earth alterative and makes it fully melt, removes the gred, and then leave standstill 10-15 minute, cast, obtain finished product, unacceptable product melts down, and salable product are put in storage.

The present invention's advantage is compared with prior art: this aluminium alloy excellent corrosion resistance, thermal conductivity are high, hardness is moderate, tensile strength is higher, unit elongation is high, precision optical machinery good processability and the advantage such as material cost is low, effectively can ensure the performance requriements of die-cast product to corrosion resistance nature and thermal conductivity.To the corrosion resistance nature and the heat dispersion that improve die casting, reducing production cost has good effect.

Accompanying drawing explanation

Fig. 1 is preparation technology's schema of the present invention.

Embodiment

Below in conjunction with embodiment, the present invention is described in further detail.

As shown in Figure 1, a kind of novel aluminum titanium alloy, by weight percentage, composed of the following components: silicon 6.0 ~ 7.0%, magnesium 1.0 ~ 2.0%, chromium 0.3 ~ 0.5%, titanium 0.15 ~ 0.35%, zinc 0.05 ~ 0.35%, manganese 0.05 ~ 0.35%, tin 0.01 ~ 0.05%, in impurity, iron is less than 0.3%, copper is less than 0.03%, and nickel is less than 0.02%, and all the other are aluminium and inevitable impurity.

The Lan cerium mishmetal or be equivalent to that described aluminum titanium alloy contains 0.15% ~ 0.25% is less than the gallium phosphide of 300ppm gallium content and the vanadium of 100-250ppm with crystallization of refinement particle, and the calcium of 1-30ppm is to improve cutting ability and to be conducive to removing the hydrogen in aluminium liquid.

A preparation technology for novel aluminum titanium alloy, comprises the following steps:

(1) charge calculation;

(2) fine aluminium is added: add fine aluminium fusing in a furnace according to calculating, after fusing, maintain the temperature at 700 DEG C-720 DEG C;

(3) silicon is added: add silicon fusing, after fusing, maintain the temperature at 700 DEG C-720 DEG C;

(4) add aluminium titanium, aluminium chromium, alumal: add aluminium titanium master alloy, aluminium chromium hardener, aluminium manganese master alloy melt, and maintain the temperature at 690 DEG C-710 DEG C after fusing;

(5) pure zinc, pure tin is added: add pure zinc, pure tin fusing, after fusing, maintain the temperature at 690 DEG C-710 DEG C:

(6) pure magnesium is added: add the fusing of pure magnesium, after fusing, maintain the temperature at 690 DEG C-710 DEG C;

(7) stir, remove the gred, chemically examine: stir aluminum alloy melt 5-10 minute, make uniform composition, then slagging-off, sample examination;

(8) adjusting component content: adjust each element component content until meet the requirements of scope according to result of laboratory test;

(9) refining degasification: be pressed into by refining agent bottom aluminum alloy melt, carries out refining degasification until refining agent fully reacts complete;

(10) Metamorphism treatment: maintain the temperature at 700 DEG C-720 DEG C, the rare earth alterative adding 0.15 ~ 0.25% makes it fully melt, removes the gred, and then leave standstill 10-15 minute, cast, obtain finished product, unacceptable product melts down, and salable product are put in storage.

The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize description of the present invention to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.

Claims (3)

1. a novel aluminum titanium alloy, it is characterized in that: by weight percentage, composed of the following components: silicon 6.0 ~ 7.0%, magnesium 1.0 ~ 2.0%, chromium 0.3 ~ 0.5%, titanium 0.15 ~ 0.35%, zinc 0.05 ~ 0.35%, manganese 0.05 ~ 0.35%, tin 0.01 ~ 0.05%, in impurity, iron is less than 0.3%, copper is less than 0.03%, nickel is less than 0.02%, and all the other are aluminium and inevitable impurity.

2. a kind of novel aluminum titanium alloy according to claim 1, it is characterized in that: the Lan cerium mishmetal or be equivalent to that described aluminum titanium alloy contains 0.15% ~ 0.25% is less than the gallium phosphide of 300ppm gallium content and the vanadium of 100-250ppm with crystallization of refinement particle, and the calcium of 1-30ppm is to improve cutting ability and to be conducive to removing the hydrogen in aluminium liquid.

3. a preparation technology for novel aluminum titanium alloy, is characterized in that: comprise the following steps:

(1) charge calculation;

(2) fine aluminium is added: add fine aluminium fusing in a furnace according to calculating, after fusing, maintain the temperature at 700 DEG C-720 DEG C;

(3) silicon is added: add silicon fusing, after fusing, maintain the temperature at 700 DEG C-720 DEG C;

(4) add aluminium titanium, aluminium chromium, alumal: add aluminium titanium master alloy, aluminium chromium hardener, aluminium manganese master alloy melt, and maintain the temperature at 690 DEG C-710 DEG C after fusing;

(5) pure zinc, pure tin is added: add pure zinc, pure tin fusing, after fusing, maintain the temperature at 690 DEG C-710 DEG C;

(6) pure magnesium is added: add the fusing of pure magnesium, after fusing, maintain the temperature at 690 DEG C-710 DEG C;

(7) stir, remove the gred, chemically examine: stir aluminum alloy melt 5-10 minute, make uniform composition, then slagging-off, sample examination;

(8) adjusting component content: adjust each element component content until meet the requirements of scope according to result of laboratory test;

(9) refining degasification: be pressed into by refining agent bottom aluminum alloy melt, carries out refining degasification until refining agent fully reacts complete;

(10) Metamorphism treatment: maintain the temperature at 700 DEG C-720 DEG C, the rare earth alterative adding 0.15 ~ 0.25% makes it fully melt, removes the gred, and then leave standstill 10-15 minute, cast, obtain finished product, unacceptable product melts down, and salable product are put in storage.