TiCB—Al seed alloy, manufacturing method thereof and heritable aluminum alloy

Patent metadata

Field	Value
Publication number	US-11629392-B2
Application number	US-202017130082-A
Country	US
Kind code	B2
Filing date	Dec 22, 2020
Priority date	Aug 24, 2020
Publication date	Apr 18, 2023
Grant date	Apr 18, 2023

Abstract

The present disclosure provides a TiCB—Al seed alloy, a manufacturing method thereof and a heritable aluminum alloy. The TiCB—Al seed alloy includes an Al matrix and TiCB@TiBC seed crystals dispersed on the Al matrix, wherein the TiCB@TiBC seed crystal comprises a core part and a shell part, the core part contains B-doped TiCB, and the shell part covers at least a part of the core part and contains a TiBC ternary phase, wherein the B-doped TiCB refers to a TiCB phase formed by B atoms occupying C vacancies in a TiCx crystal, and the TiBC ternary phase refers to a ternary phase composed of Ti, B and C, wherein x<1.

First claim

What is claimed is:

1. A TiCB—Al seed alloy, comprising an Al matrix and a plurality of TiC B @TiBC seed crystals dispersed on the Al matrix, wherein each TiC B @TiBC seed crystal comprises a core part and a shell part, the core part contains B-doped TiC B , and the shell part covers at least a part of the core part and contains a TiBC ternary phase, wherein the B-doped TiC B refers to a TiC B phase formed by B atoms occupying C vacancies in a TiC x crystal, and the TiBC ternary phase refers to a ternary phase composed of Ti, B and C, wherein x<1.

2. The TiCB—Al seed alloy of claim 1 , wherein a content of C in the core part is higher than a content of C in the shell part, and a content of B in the core part is lower than a content of B in the shell part.

3. The TiCB—Al seed alloy of claim 1 , wherein the B-doped TiC B is represented by TiC x B y , wherein 0.72<x<0.81, and 0<y<0.17.

4. The TiCB—Al seed alloy of claim 1 , wherein a content of the plurality of TiC B @TiBC seed crystals is 0.08 wt % to 10.24 wt % based on 100 wt % of the TiCB—Al seed alloy.

5. The TiCB—Al seed alloy of claim 4 , wherein a content of Ti is 0.06 wt % to 7.77 wt %, a content of C is 0.01 wt % to 1.30 wt %, and a content of B is 0.01 wt % to 1.17 wt % based on 100 wt % of the TiCB—Al seed alloy.

6. The TiCB—Al seed alloy of claim 1 , wherein a morphology of each TiC B @TiBC seed crystal is different from those of a hexagonal sheet-like TiB 2 crystal and an octahedral-like or tetrahedral-like TiC x crystal.

7. The TiCB—Al seed alloy of claim 6 , wherein each TiC B @TiBC seed crystal is generally spherical and a diameter of the TiC B @TiBC seed crystal is between 50 nm and 800 nm.

8. A method of manufacturing a TiCB—Al seed alloy, comprising:
(1) preparing 0.64 wt % to 75.00 wt % of an Al—Al 3 BC master alloy, 0.06 wt % to 7.77 wt % of a sponge titanium, and a balance of a commercial-purity aluminum, wherein a content of Al 3 BC in the Al—Al 3 BC master alloy is 3.0 wt % to 15.0 wt % of a total weight of the Al—Al 3 BC master alloy;
(2) melting the commercial-purity aluminum and the Al—Al 3 BC master alloy and heating to 850° C. to 1300° C.;
(3) adding the sponge titanium, and holding for 5 min to 60 min after the sponge titanium being dissolved to obtain a melt; and
(4) pouring the melt to obtain the TiCB—Al seed alloy of claim 1 .

9. An aluminum alloy, comprising α-Al and a plurality of TiC B @TiBC seed crystals, each TiC B @TiBC seed crystal having a core part and a shell part, wherein the core part contains a B-doped TiC B , and the shell part covers at least a part of the core part and contains a TiBC ternary phase, and wherein the B-doped TiC B refers to TiC B phase formed by B atoms occupying C vacancies in a TiC x crystal, and the TiBC ternary phase refers to a ternary phase composed of Ti, B, and C, where x<1.

10. The aluminum alloy of claim 9 , wherein a content of the plurality of TiC B @TiBC seed crystals is 0.001 wt % to 5.120 wt % based on 100 wt % of the aluminum alloy,
the aluminum alloy is an Al—Zn series alloy, and a content of Al is 60.0 wt %-98.9 wt %, a content of Zn is 1.0 wt %-10.0 wt %, and a content of Zr is 0.0 wt %-0.8 wt % based on 100 wt % of the heritable Al—Zn series alloy.

11. The aluminum alloy of claim 9 , wherein a content of the plurality of TiC B @TiBC seed crystals is 0.001 wt % to 5.120 wt % based on 100 wt % of the aluminum alloy,
the aluminum alloy is a heritable an Al—Si series alloy, and a content of Al is 60.0 wt %-99.5 wt %, and a content of Si is 0.4 wt %-13.0 wt % based on 100 wt % of the Al—Si series alloy.

12. The aluminum alloy of claim 10 , wherein an average grain size of α-Al in the Al—Zn series alloy measured by a TP-1 standard method is between 20 μm and 150 μm.

13. The aluminum alloy of claim 11 , an average grain size of α-Al in the Al—Si series alloy measured by a KBI ring mold method or the TP-1 standard method is between 35 μm and 250 μm.

14. The aluminum alloy of claim 12 , wherein an average grain size of α-Al in a casting obtained after remelting the Al—Zn series alloy is smaller than the average grain size of α-Al in the heritable Al—Zn series alloy before remelting.

15. The aluminum alloy of claim 13 , wherein an average grain size of α-Al in a casting obtained after remelting the Al—Si series alloy is smaller than the average grain size of α-Al in the Al—Si series alloy before prior to remelting.

16. The aluminum alloy of claim 14 , wherein the average grain size of α-Al in the casting obtained by remelting the Al—Zn series alloy at 700° C. to 820° C. and holding for 15 min to 100 min is between 5 μm and 150 μm.

17. The aluminum alloy of claim 15 , wherein the average grain size of α-Al in the casting obtained after remelting the Al—Si series alloy at 680° C. to 820° C. and holding for 15 min to 180 min is between 5 μm and 200 μm.

Assignees

• Univ Shandong
• Shandong Maiaojing New Mat Company Limited
• Shandong Al&Mg Melt Tech Company Limited
• Shandong Al&Mg Melt Tech Company Limtted

Inventors

• Liu Xiangfa
• Nie Jinfeng
• Sun Qianqian
• Liu Guiliang
• Han Mengxia

Classifications

• C22C1/1047

  by mixing and casting liquid metal matrix composites · CPC title

• C22C1/1036

  starting from a melt · CPC title

• C22C32/0047

  with carbides, nitrides, borides or silicides as the main non-metallic constituents · CPC title

• C22C14/00 Primary

  Alloys based on titanium · CPC title

• C22C21/003

  containing at least 2.6% of one or more of the elements: tin, lead, antimony, bismuth, cadmium, and titanium · CPC title