Mechanical alloying preparation method of Ti-22Al-25Nb (at.%) solid solution

A ti-22al-25nb, mechanical alloying technology, applied in metal processing equipment, transportation and packaging, etc., can solve the problems of Al element burning, long production cycle, high cost, etc., to improve efficiency, avoid component segregation, prevent pollution effect

Active Publication Date: 2018-08-31
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Because the elements Ti, Al and Nb have high chemical activity and large difference in physical properties, the heat of reaction in the smelting process is high, and it is easy to cause serious segregation of Nb element and large burning loss of Al element, so it is difficult to ensure the uniformity of Ti-22Al-25Nb alloy. chemical composition
The microstructure of Ti-22Al-25Nb alloy castings is coarse, and casting defects such as segregation, porosity, and shrinkage porosity will seriously affect the mechanical properties of the castings. Multiple thermoplastic processing procedures such as rolling improve its plastic forming performance, the process is more complicated, the efficiency is lower, the production cycle is longer, and the cost is higher

Method used

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  • Mechanical alloying preparation method of Ti-22Al-25Nb (at.%) solid solution
  • Mechanical alloying preparation method of Ti-22Al-25Nb (at.%) solid solution
  • Mechanical alloying preparation method of Ti-22Al-25Nb (at.%) solid solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] S1. Weigh 20.8g of Ti powder, 5g of Al powder, and 19.2g of Nb powder, totaling 45g of elemental element powder;

[0044] S2, adding the weighed elemental element powder into a stainless steel ball milling tank, putting stainless steel grinding balls with a diameter of 5 mm, 10 mm and 20 mm in the ball grinding tank, and the quality of the grinding balls is 147.3 g, 98.2 g, 24.6 g respectively;

[0045] S3. The stainless steel ball mill tank is evacuated and filled with argon, and then evacuated and filled with argon, repeating 3 times;

[0046] S4. Place the stainless steel ball mill tank on the planetary ball mill to perform low-energy powder mixing ball milling at a speed of 150r / min. The mixing time is 8 hours, and the machine is stopped for 10 minutes after mixing for 1 hour;

[0047] S5. The stainless steel ball milling tank is subjected to high-energy ball milling on a planetary ball mill at a speed of 390r / min for 50 hours, and the ball mill is stopped for 20 mi...

Embodiment 2

[0052] S1. Weigh 20.8g of Ti powder, 5g of Al powder, and 19.2g of Nb powder, totaling 45g of elemental element powder;

[0053] S2. Add the weighed elemental element powder into the stainless steel ball mill tank, and add a total of 360g of stainless steel grinding balls at a ratio of 8:1. The diameters of the stainless steel grinding balls are 5mm, 10mm and 20mm, and the masses are 196.4g respectively. , 130.9g, 32.7g;

[0054] S3. The stainless steel ball mill tank is evacuated and filled with argon, and then evacuated and filled with argon, repeating 3 times;

[0055] S4. Place the stainless steel ball mill jar on the planetary ball mill to perform low-energy powder mixing ball milling at a speed of 180r / min for 8 hours, and stop for 10 minutes every time the powder is mixed for 1 hour;

[0056] S5. The stainless steel ball milling tank is subjected to high-energy ball milling on a planetary ball mill at a speed of 390r / min for 50 hours, and the ball mill is stopped for 2...

Embodiment 3

[0061] S1. Weigh 20.8g of Ti powder, 5g of Al powder, and 19.2g of Nb powder, totaling 45g of elemental element powder;

[0062] S2. Add the weighed elemental element powder into a stainless steel ball mill tank, and add a total of 405g of stainless steel grinding balls at a ratio of 8:1. The diameters of the stainless steel grinding balls are 5mm, 10mm, and 20mm, and their masses are 220.9g. , 147.3g, 36.8g;

[0063] S3. The stainless steel ball mill tank is evacuated and filled with argon, and then evacuated and filled with argon, repeating 3 times;

[0064] S4. Place the stainless steel ball milling tank on a planetary ball mill and perform low-energy powder mixing ball milling at a speed of 150r / min for 8 hours, stop and rest for 10 minutes every 1 hour of powder mixing;

[0065] S5. The stainless steel ball milling tank is subjected to high-energy ball milling on a planetary ball mill at a speed of 390r / min for 70 hours, and the ball mill is stopped for 20 minutes every ...

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Abstract

The invention belongs to the technical field of material preparation, and particularly relates to a mechanical alloying preparation method of a Ti-22Al-25Nb (at.%) solid solution. The method comprisesthe following steps that S1, weighing is carried out according to the element ratio of the solid solution, wherein Ti powder, Al powder and Nb powder are weighted according to the atomic ratio of 53: 22 : 25 ; S2, the weighed three kinds of element powder are added into a ball milling tank, and stainless steel grinding balls are added according to a ball material ratio of 6 : 1 to 9 : 1; S3, theball milling tank is vacuumized, and then is filled with argon; S4, the ball milling tank is placed on a ball mill for low-energy mixed powder ball milling; S5, the ball milling tank performs high-energy ball milling on the ball mill; S6, the ball milling tank is allowed to be subject to standing for 24 hours in an argon glove box, then an upper cover of the ball milling tank is opened for passivation, and the passivation time is not less than 24 hours; and S7, the powder and the grinding balls are sieved and separated in the argon glove box to obtain Ti-22Al-25Nb (at.%) solid solution powder. According to the method, no process control agent is added so that the pollution to the powder can be prevented, and the mechanical alloying efficiency can be improved.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and in particular relates to a mechanical alloying preparation method of Ti-22Al-25Nb (at.%) solid solution. Background technique [0002] Ti 2 AlNb-based alloys have great advantages over traditional Ti alloys, especially Ti-22Al-25Nb(at.%) alloys have higher specific strength, excellent creep resistance and better oxidation resistance, etc. Comprehensive properties, as a potential high-temperature structural material in the temperature range of 600°C-800°C, its application in the aerospace field is becoming more and more extensive. Therefore, the technology related to the preparation of Ti-22Al-25Nb (at.%) alloy has attracted more and more attention. [0003] Because the elements Ti, Al and Nb have high chemical activity and large difference in physical properties, the heat of reaction in the smelting process is high, and it is easy to cause serious segregation of Nb element and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/04B22F1/00C22C14/00
CPCC22C14/00B22F9/04B22F2009/041B22F1/145
Inventor 贾建波刘文超徐岩鹿超刘海亮
Owner YANSHAN UNIV
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