HIGH-STRENGTH A356 ALLOY AND PREPARATION METHOD THEREOF
원문보기
IPC분류정보
국가/구분
United States(US) Patent
공개
국제특허분류(IPC7판)
C22C-021/04
C22F-001/043
출원번호
16693896
(2019-11-25)
공개번호
20200299810
(2020-09-24)
우선권정보
CN-201910220737.7 (2019-03-22)
발명자
/ 주소
FU, Shoujun
LIU, Jinwei
WANG, Chunwei
SUN, Haichao
LIU, Huiying
출원인 / 주소
FU, Shoujun
인용정보
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0인용 특허 :
0
초록▼
A high-strength A356 alloy and a preparation method thereof are disclosed. Modifiers Ba and Zr are added to improve the as-cast structure of the alloy. The high-pressure solidified A356 alloy prepared by a high-pressure solidification technology has finer grains, and the elements such as Mg and Si h
A high-strength A356 alloy and a preparation method thereof are disclosed. Modifiers Ba and Zr are added to improve the as-cast structure of the alloy. The high-pressure solidified A356 alloy prepared by a high-pressure solidification technology has finer grains, and the elements such as Mg and Si have higher supersaturated solubility in a matrix.
대표청구항▼
1. A high-strength A356 alloy, wherein the alloy is prepared from the following components in percentage by mass: 6.5 to 7.5 percent of Si, 0.3 to 0.5 percent of Mg, 0.05 to 0.1 percent of Cu, 0.05 to 0.2 percent of Ti, 0.1 to 0.5 percent of Ba, 0.5 to 1.5 percent of Zr, less than or equal to 0.15 p
1. A high-strength A356 alloy, wherein the alloy is prepared from the following components in percentage by mass: 6.5 to 7.5 percent of Si, 0.3 to 0.5 percent of Mg, 0.05 to 0.1 percent of Cu, 0.05 to 0.2 percent of Ti, 0.1 to 0.5 percent of Ba, 0.5 to 1.5 percent of Zr, less than or equal to 0.15 percent of impurity elements and the balance of Al. 2. The high-strength A356 alloy according to claim 1, wherein the mass percentages of the above components of the alloy are as follows: 7 percent of Si, 0.35 percent of Mg, 0.05 percent of Cu, 0.08 percent of Ti, 0.3 percent of Ba, 0.6 percent of Zr, less than or equal to 0.15 percent of impurity elements and the balance of Al. 3. A preparation method of the high-strength A356 alloy according to claim 1, comprising the following steps: (1) taking an A356 aluminum ingot, a pure Mg ingot, an Al—Ba intermediate alloy and an Al—Zr intermediate alloy as raw materials, and calculating desired mass of the various raw materials according to components of the target alloy;(2) preheating the raw materials in Step (1) at 300 DEG C.;(3) setting heating temperature of a crucible resistance furnace as 720 to 780 DEG C.; adding the A356 aluminum ingot when the temperature of the crucible reaches 300 to 350 DEG C.; adding the Al—Ba intermediate alloy and the Al—Zr intermediate alloy in sequence when the A356 aluminum ingot is completely melted and the temperature of the crucible reaches 600 to 650 DEG C.; adding a C2Cl6 refining agent after the raw materials are completely melted, and slightly stirring the mixture; removing dross from the surface of a melt when the temperature of the furnace reaches 720 to 780 DEG C., preserving the heat for 15 to 30 min, and then pouring the metal melt into a preheated metal mold to obtain a desired A356 as-cast alloy;(4) performing high-pressure solidification on the A356 as-cast alloy obtained in Step (3): setting solidification pressure as 2 to 5 GPa, at the same time, fast heating the A356 as-cast alloy to 750 to 850 DEG C., preserving the heat and the pressure at this temperature for 15 to 20 min, turning off a power supply to stop heating, performing pressure relief after the A356 as-cast alloy is cooled to room temperature, and taking out the A356 as-cast alloy to obtain a further refined high-pressure solidified A356 alloy;(5) aging the high-pressure solidified A356 alloy obtained in Step (4) at 150 to 200 DEG C. for 2 to 100 h to finally obtain the high-strength A356 alloy. 4. A preparation method of the high-strength A356 alloy according to claim 2, comprising the following steps: (1) taking an A356 aluminum ingot, a pure Mg ingot, an Al—Ba intermediate alloy and an Al—Zr intermediate alloy as raw materials, and calculating desired mass of the various raw materials according to components of the target alloy;(2) preheating the raw materials in Step (1) at 300 DEG C.;(3) setting heating temperature of a crucible resistance furnace as 720 to 780 DEG C.; adding the A356 aluminum ingot when the temperature of the crucible reaches 300 to 350 DEG C.; adding the Al—Ba intermediate alloy and the Al—Zr intermediate alloy in sequence when the A356 aluminum ingot is completely melted and the temperature of the crucible reaches 600 to 650 DEG C.; adding a C2Cl6 refining agent after the raw materials are completely melted, and slightly stirring the mixture; removing dross from the surface of a melt when the temperature of the furnace reaches 720 to 780 DEG C., preserving the heat for 15 to 30 min, and then pouring the metal melt into a preheated metal mold to obtain a desired A356 as-cast alloy;(4) performing high-pressure solidification on the A356 as-cast alloy obtained in Step (3): setting solidification pressure as 2 to 5 GPa, at the same time, fast heating the A356 as-cast alloy to 750 to 850 DEG C., preserving the heat and the pressure at this temperature for 15 to 20 min, turning off a power supply to stop heating, performing pressure relief after the A356 as-cast alloy is cooled to room temperature, and taking out the A356 as-cast alloy to obtain a further refined high-pressure solidified A356 alloy;(5) aging the high-pressure solidified A356 alloy obtained in Step (4) at 150 to 200 DEG C. for 2 to 100 h to finally obtain the high-strength A356 alloy.
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