Al-M-B grain refiner for casting Al-Si alloy and preparation method thereof

A technology of casting aluminum-silicon alloy and grain refiner, which is applied in the field of aluminum alloy smelting, can solve the problems of poor refinement effect, high Nb content, and easy settlement failure of cast aluminum-silicon alloy, so as to achieve good refinement effect and equipment The effect of simple conditions and convenient operation

Pending Publication Date: 2019-02-26
SHANGHAI UNIV
View PDF4 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of the prior art, the purpose of the present invention is to overcome the deficiencies of the prior art, to provide an Al-M-B grain refiner for casting aluminum-silicon alloy and its preparation method, to solve the current commercial Al-5Ti-B The refining agent has poor refining effect on cast aluminum-silicon alloy, and the high Nb content in the commercial Al-5Nb-B refining agent leads to the technical problems of easy settlement failure and high cost

Method used

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Al-M-B grain refiner for casting Al-Si alloy and preparation method thereof
  • Al-M-B grain refiner for casting Al-Si alloy and preparation method thereof
  • Al-M-B grain refiner for casting Al-Si alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] In this example, see Figure 1 ~ Figure 3 , a kind of preparation method of Al-M-B grain refiner for cast aluminum-silicon alloy, adopts fluorine salt method, and its steps are as follows:

[0042] a. Raw material preparation:

[0043] Using KBF 4 powder as B source material, using K 2 TiF 6 powder as the Ti source material, respectively weighed 98.7 grams of Al block, K 2 TiF 6 Powder 12.5g, Nb Powder 2.5g and KBF 4 14.0 grams of powder is used as a raw material, and the raw material that has been weighed already contains an additional weighing of K according to the standard that the yield of Ti, Nb and B is not less than 75%. 2 TiF 6 powder, Nb powder and KBF 4 The powder is used as a burning loss to supplement the raw material part;

[0044] b. Melting of Al-M-B alloy:

[0045] Mixing the raw materials weighed in the step a, melting the Al block at 800°C to obtain an aluminum melt; then adding K 2 TiF 6 powder, Nb powder, KBF 4 After the powder is mixed,...

Embodiment 2

[0054] This embodiment is basically the same as Embodiment 1, especially in that:

[0055] In this example, see Figure 7 ~ Figure 9 , a kind of preparation method of Al-M-B grain refiner for cast aluminum-silicon alloy, adopts fluorine salt method, and its steps are as follows:

[0056] a. Raw material preparation:

[0057] Using KBF 4 powder as B source material, using K 2 TiF 6 powder as the Ti source material, respectively weighed 99.4 grams of Al block, K 2 TiF 6 Powder 22.3g, Nb Powder 2.2g and KBF 4 19.4 grams of powder are used as raw materials, and the raw materials that have been weighed already contain additional weighing of K according to the standard that the yield of Ti, Nb and B is not less than 75%. 2 TiF 6 powder, Nb powder and KBF 4 The powder is used as a burning loss to supplement the raw material part;

[0058] b. This step is the same as in Embodiment 1.

[0059] Experimental test analysis:

[0060] Adopt X-ray diffraction, Rietveld refining t...

Embodiment 3

[0063] The aforementioned embodiment of this embodiment is basically the same as the embodiment, and the special features are:

[0064] In this example, see Figure 10 ~ Figure 13 , a kind of preparation method of Al-M-B grain refiner for cast aluminum-silicon alloy, adopts fluorine salt method, and its steps are as follows:

[0065] a. Raw material preparation:

[0066] Using KBF 4 powder as B source material, using K 2 TiF 6 powder as the Ti source material, respectively weighed 97.2 grams of Al block, K 2 TiF 6 Powder 11.0g, Nb Powder 4.3g and KBF 4 10.8 grams of powder are used as raw materials, and the raw materials that have been weighed already contain additional weighing of K according to the standard that the yield of Ti, Nb and B is not less than 75%. 2 TiF 6 powder, Nb powder and KBF 4 The powder is used as a burning loss to supplement the raw material part;

[0067] b. This step is the same as in Embodiment 1.

[0068] Experimental test analysis:

[006...

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
Sizeaaaaaaaaaa
Sizeaaaaaaaaaa
Grain sizeaaaaaaaaaa
Login to view more

Abstract

The invention provides an Al-M-B grain refiner for casting an Al-Si alloy and a preparation method thereof. The Al-M-B refiner for casting the Al-Si alloy is composed of the components by mass: 85.0-96.0% of Al, 3.5-10.0% of M and 0.5-5.0% of B; the Al-M-B refiner contains refined particle phase MAl3 and MB2. The Al-M-B grain refiner is prepared by a fluoride salt method with Al blocks, K2TiF6 powder, Nb powder and KBF4 powder as raw materials. The Al-M-B alloy is prepared by melting. The prepared Al-M-B refiner can refine the grain size of alpha-Al in a high-silicon aluminum alloy to 700 microns or less, optimally to 200 microns or less; the amount of Nb is reduced and the cost of raw materials is reduced; the Al-M-B refiner has durable performance and is not easy to settle down and fail,and the refinement effect can still be less than 350 microns after heat preservation is performed for 2 h; the preparation method has the advantages of simple equipment conditions required for preparation and simple operation, and is suitable for industrial production.

Description

technical field [0001] The invention relates to a metal material additive and a preparation method thereof, in particular to a refiner for casting aluminum-silicon alloys and a preparation method thereof, which is applied in the technical field of aluminum alloy smelting. Background technique [0002] Cast aluminum-silicon alloys are widely used in industry due to their good mechanical properties and excellent casting properties. Refining the grains of the alloy can obtain a dense alloy structure, and at the same time reduce the tendency of hot cracking and segregation of the casting, and reduce the porosity, thereby improving the overall performance of the alloy. The most commonly used and effective refinement method is to add grain refiner, among which Al-5Ti-B refiner has been widely used. However, this refiner is not suitable for refining aluminum-silicon alloys with high silicon content (greater than 5% Si), the main reason is that silicon elements interact with titani...

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
no application Login to view more
IPC IPC(8): C22C1/03C22C21/02C22C21/00C22C1/02
CPCC22C1/02C22C1/03C22C21/00C22C21/003C22C21/02
Inventor 李谦黎阳
Owner SHANGHAI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap