Zinc-aluminum-titanium master alloy and preparation method thereof

An intermediate alloy and aluminum alloy technology, applied in the field of metal alloy materials, can solve the problems of increasing production costs, unstable absorption of refined elements, and inability to precisely control the amount of addition.

An intermediate alloy and aluminum alloy technology, applied in the field of metal alloy materials, can solve the problems of increasing production costs, unstable absorption of refined elements, and inability to precisely control the amount of addition.

CN102277516AInactive Publication Date: 2011-12-14UNIV OF JINAN
2 Cites 11 Cited by

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Zinc-aluminum-titanium master alloy and preparation method thereof
  • Zinc-aluminum-titanium master alloy and preparation method thereof
  • Zinc-aluminum-titanium master alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] To prepare Zn-6.1wt.%Al-5wt.%Ti master alloy, according to the chemical composition of the master alloy, weigh Zn-10wt.%Al alloy and K 2 TiF 6 Powder the two raw materials to make K 2 TiF 6 It is 25.5% of the weight of zinc-aluminum alloy. Melt the Zn-10wt.%Al alloy to 600-780°C in a graphite clay crucible with a resistance furnace, and then add K 2 TiF 6 Add the powder to the surface of the Zn-10wt.%Al alloy melt in two batches, and then continue to keep warm for 2-15 minutes after adding it completely, and pour the upper oil melt in the crucible into the solidification mold to separate it from the lower alloy melt , the lower alloy melt is fully stirred and poured into another mold, and after cooling, the Zn-6.1wt.%Al-5wt.%Ti master alloy can be obtained. XRD ( figure 1 ) and SEM ( figure 2 ) analysis shows that the matrix of this alloy is mainly η-Zn, and TiAl with a size of 0.3-3 μm is dispersed in the matrix 3-x Zn x (0.4figure 2 shown in B).

[0042] Ad...

Embodiment 2

[0044] To prepare Zn-35wt.%Al-15wt.%Ti master alloy, according to its chemical composition, weigh Zn-48wt.%Al alloy and K 2 TiF 6 Powder the two raw materials to make K 2 TiF 6 It is 79% of the weight of Zn-48wt.%Al alloy. The Zn-48wt.%Al alloy was melted to 600-780°C in a graphite clay crucible with an induction furnace, and then K 2 TiF 6 Add the powder to the surface of the Zn-48wt.%Al alloy melt in four batches, and then continue to keep warm for 2-15 minutes after adding it completely, and pour the upper oil melt in the crucible into the solidification mold to separate it from the lower alloy melt , and then the lower alloy melt is fully stirred and poured into the mold. After cooling, the Zn-35wt.%Al-15wt.%Ti master alloy can be obtained. XRD ( Figure 5 ) and SEM ( Figure 6 ) analysis shows that the matrix of this master alloy is mainly η-Zn and α-Al, and TiAl with a size of 0.3-3 μm is dispersed in the Zn-Al matrix 3-x Zn x (0.4<x<1.7) polyhedral particles. ...

Embodiment 3

[0046] To prepare Zn-27wt.%Al-6.2wt.%Ti master alloy, weigh Zn-32wt.%Al alloy and K 2 TiF 6 Powder the two raw materials to make K 2 TiF 6 It is 32% of the weight of Zn-32wt.%Al alloy. Melt the Zn-32wt.%Al alloy to 600-780°C in a graphite clay crucible with a power frequency induction furnace, and then add K 2 TiF 6 Add the powder to the surface of the Zn-32wt.%Al alloy melt in three batches, and then continue to keep warm for 2-15 minutes after adding it completely, and pour the upper oil melt in the crucible into the solidification mold to separate it from the lower alloy melt , and then the lower alloy melt is fully stirred and poured into the mold, and after cooling, the Zn-27wt.%Al-6.2wt.%Ti master alloy can be obtained. This master alloy matrix is ​​mainly η-Zn and α-Al ( Figure 7 , Figure 8 ), and TiAl with a diameter of mostly 0.3-3 μm is dispersed in the Zn-Al matrix 3-x Zn x (0.4 Figure 8 ). Adding this master alloy into the Zn-25Al alloy melt at 560°C ca...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a Zn-Al-Ti intermediate alloy comprising the following ingredients in percentage by weight: 2.94-40wt% of Al, 4-16wt% of Ti and the balance of Zn. The invention also discloses a preparation method of the intermediate alloy. After the prepared Zn-Al-Ti intermediate alloy is added into Zn-Al alloy to be refined, TiAl3-xZnx particles can directly serve as a nucleation core inthe primary alpha-Al crystal grain crystallization process in the Zn-Al alloy so as to achieve the purpose of refining the crystal grain. In addition, parts of TiAl3-xZnx particles are melted to release titanium atoms; and the primary alpha-Al crystal grain is refined by composition undercooling action. The preparation method disclosed by the invention is simple, the obtained intermediate alloy has efficient crystal grain refining action, and the alpha-Al crystal grain after Zn-Al alloy is solidified can be obviously refined.

Description

technical field [0001] The invention relates to a zinc-aluminum-titanium master alloy and a preparation method thereof. The prepared zinc-aluminum-titanium master alloy can be used to refine the grain structure of the zinc-aluminum alloy, and belongs to the technical field of metal alloy materials. Background technique [0002] Zinc-aluminum alloys with an aluminum content higher than 5wt.% have excellent mechanical and processing properties and have broad market application potential. However, this type of zinc-aluminum alloy tends to generate well-developed primary α-Al dendrites during the solidification process, resulting in shrinkage cavities, shrinkage porosity, and intragranular component segregation defects, resulting in a decline in mechanical properties and potential aging risks of products. In order to overcome the above problems, it is necessary to add a grain refiner to the zinc-aluminum alloy to refine the grains in actual production. [0003] It has been foun...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
14 Dec 2011
Publication
CN102277516A
IPC
C22C18/00; C22C18/04; C22C1/03
Inventors
王振卿; 杨中喜