CN1616702A - Aluminium base noncrystal alloy and its preparing method - Google Patents

Abstract

The noncrystalline aluminum-base alloy contains Ni 8-10 at.%, Zr 3-7 at.%, Cu 1-5 at.% and Y 1-3 at.% except Al. Its preparation process includes weighing and mixing the material, melting under protection of inert gas and vacuum degree of 0.002 Pa for 3-5 times; polishing the mother alloy ingot to eliminate oxide scale; re-melting the mother alloy under protective inert gas inside quartz tube and maintaining for 1-3 min; and throwing belt at copper roller linear speed of 23 m/s and melt spraying pressure of 0.03 MPa in atmosphere or at copper roller linear speed of 23 m/s and melt spraying pressure of 0.05 MPa in vacuum environment.

Description

Al based amorphous alloy and preparation method thereof

Technical field

The present invention relates to nonferrous materials and preparation method thereof.

Background technology

Aluminum base alloy becomes one of structural metallic materials that is most widely used at present with its higher specific tenacity.Preparation aluminium-based amorphous alloy and nanometer crystal alloy mainly adopt vacuum environment melt supercooled method and mechanical alloying method at present.Because aluminum base alloy amorphous formation ability and thermostability are limited, belong to marginal glass formingalloys, its critical cooling rate is 10 ^5-6K/s, strict to the alloying constituent that forms amorphous, yield rate is lower, its product mostly is strip or powder body material, directly synthesizing of block materials is also very difficult, has limited in application in engineering, therefore improves al based amorphous alloy and forms ability and thermostability, overcoming the deficiency of existing technology of preparing, is present problem demanding prompt solution.

Summary of the invention

The objective of the invention is to improve al based amorphous alloy and form ability and thermostability, prepare and have better flexible al based amorphous alloy.

The present invention is al based amorphous alloy and preparation method thereof, and al based amorphous alloy is made up of Al, Ni, Zr, Cu, Y, and it is characterized in that it consists of by atomic percent: Ni 8～10%, and Zr 3～7%, and Cu 1～5%, and Y 1～3%, and all the other are Al.

The preparation method of above-mentioned al based amorphous alloy can carry out in vacuum and atmospheric environment respectively, it is characterized by:

(1) starting material that are respectively Al 〉=99.9%, Ni 〉=99.9%, Zr 〉=99.8%, Y 〉=99%, AlCu50 〉=99% with purity carry out oxide skin and break away from and clean, and take by weighing raw material according to the composition of the described al based amorphous alloy of claim 1, mix;

(2) with the starting material that prepare in protection of inert gas atmosphere, vacuum tightness is 2 * 10 ^-3Fusion is 3-5 time under the condition of pa;

(3) melted master alloy ingot is carried out mechanical grinding, remove surface scale, break into pieces and soak with acetone, the flush away surface blot is put into the quartz glass tube that is connected with rare gas element;

(4) in protection of inert gas atmosphere, mother alloy is carried out remelting; treat that alloy melts back insulation 1～3min fully; get rid of band then; the linear velocity of copper roller is 23～40m/s when getting rid of band in atmospheric environment; melt jet pressure is 0.03～0.05Mpa; the linear velocity of copper roller is 23～30m/s when getting rid of band in vacuum environment, and melt jet pressure is 0.05MPa.

Usefulness of the present invention is: the present invention is based on Al, Ni, Zr alloy, increase the diversity of alloy constituent element by interpolation Cu, Y element, bigger negative mixture heat between bigger atomic radius difference and alloy constituent element has improved amorphous formation ability and thermostability between constituent element.

Description of drawings

Fig. 1 is the synoptic diagram of the smelting apparatus of mother alloy of the present invention, and Fig. 2 is fusion of the present invention-get rid of a belting synoptic diagram.

Embodiment

As shown in Figure 1, adopt electric arc to carry out 3-5 time fusion in the crucible 2 of mother alloy 4 in vacuum environment, cooling tube 3 is equipped with in crucible 2 bottoms, and water coolant passes from cooling tube 3, and arrow is depicted as the direction of water coolant Inlet and outlet water among the figure.

As shown in Figure 2, the mother alloy ingot that smashes is placed in the silica tube 5, the upper end of silica tube 5 feeds Ar gas, ruhmkorff coil 6 is enclosed within on the silica tube 5, by induction heating mother alloy remelting in the silica tube 5, the nozzle 7 of the liquid alloy after the fusion through silica tube 5 lower ends are ejected into and form the ribbon al based amorphous alloy on the copper roller rotating 8.

Below further launch two embodiment:

Embodiment 1:

(1) at first is respectively the starting material of Al 〉=99.9%, Ni 〉=99.9%, Zr 〉=99.8%, Y 〉=99%, AlCu50 〉=99%, according to Al with purity ₈₀Ni ₈Zr ₃Cu ₂Y ₂Atomic percent take by weighing raw material;

(2) earlier with starting material place to go oxide skin and ultrasonic cleaning, mother alloy is carried out melting with vacuum arc fumace under the Ar protective atmosphere, vacuum tightness is 2 * 10 ^-3Pa is placed in the crucible 2 according to raw-material fusing point is different with density again, and upset remelting three times is to guarantee the even of alloying constituent and tissue;

(3) melted master alloy ingot 4 is carried out mechanical grinding after, remove surface scale, break into pieces and soak 30min with acetone, the dirty debt in flush away surface is put into silica tube 5;

(4) in vacuum and atmospheric environment, get rid of band respectively.Mother alloy is placed the silica tube 5 that is connected with Ar gas, heat the mother alloy that remeltings are used to get rid of band, treat that alloy melts back insulation 1min fully with radio-frequency induction coil 6.

The linear velocity of copper roller is 23m/s when getting rid of band in atmospheric environment, and the spraying pressure of liquid alloy is 0.04Mpa.

The linear velocity of copper roller is 29m/s when getting rid of band in vacuum environment, and the spraying pressure of liquid alloy is 0.05MPa.

Zhi Bei Al as stated above ₈₀Ni ₈Zr ₃Cu ₂Y ₂Band is an amorphous through X-ray diffraction, transmission electron microscope, DSC checking.

Embodiment 2:

(1) at first is respectively the starting material of Al 〉=99.9%, Ni 〉=99.9%, Zr 〉=99.8%, Y 〉=99%, AlCu50 〉=99%, according to Al with purity ₈₀Ni ₁₀Zr ₃Cu ₅Y ₂Atomic percent take by weighing raw material;

(2) earlier with starting material place to go oxide skin and ultrasonic cleaning, mother alloy is carried out melting with vacuum arc fumace under the Ar protective atmosphere, vacuum tightness is 2 * 10 ^-3Pa is placed in the crucible 2 according to raw-material fusing point is different with density again, and upset remelting three times is to guarantee the even of alloying constituent and tissue;

(3) melted master alloy ingot 4 is carried out mechanical grinding after, remove surface scale, break into pieces and soak 30min with acetone, the dirty debt in flush away surface is put into silica tube 5;

(4) in vacuum and atmospheric environment, get rid of band respectively.Mother alloy is placed the silica tube 5 that is connected with Ar gas, heat the mother alloy that remeltings are used to get rid of band, treat that alloy melts back insulation 1min fully with radio-frequency induction coil 6.

The linear velocity of copper roller is 23m/s when getting rid of band in atmospheric environment, and the spraying pressure of liquid alloy is 0.04MPa;

The linear velocity of copper roller is 29m/s when getting rid of band in vacuum environment, and the spraying pressure of liquid alloy is 0.05MPa.

As stated above the preparation Al ₈₀Ni ₁₀Zr ₃Cu ₅Y ₂Band is an amorphous through X-ray diffraction, transmission electron microscope, DSC checking.

Claims (2)

1. al based amorphous alloy is made up of Al, Ni, Zr, Cu, Y, and it is characterized in that it consists of by atomic percent: Ni 8～10%, and Zr 3～7%, and Cu 1～5%, and Y 1～3%, and all the other are Al.

2. the al based amorphous alloy preparation method can carry out in vacuum and atmospheric environment respectively, it is characterized by:

(1) starting material that are respectively Al 〉=99.9%, Ni 〉=99.9%, Zr 〉=99.8%, Y 〉=99%, AlCu50 〉=99% with purity carry out oxide skin and break away from and clean, and take by weighing raw material according to the composition of the described al based amorphous alloy of claim 1, mix;

(2) with the starting material that prepare in protection of inert gas atmosphere, vacuum tightness is 2 * 10 ^-3Fusion is 3-5 time under the condition of Pa;

(3) melted master alloy ingot is carried out mechanical grinding, remove surface scale, break into pieces and soak with acetone, the flush away surface blot is put into the quartz glass tube that is connected with rare gas element;

(4) in protection of inert gas atmosphere, mother alloy is carried out remelting; treat that alloy melts back insulation 1～3min fully; get rid of band then; the linear velocity of copper roller is 23～40m/s when getting rid of band in atmospheric environment; melt jet pressure is 0.03～0.05Mpa; the linear velocity of copper roller is 23～30m/s when getting rid of band in vacuum environment, and melt jet pressure is 0.05MPa.