# US 2021/0340649 A1 · Alloy material and process of manufacturing same

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- Number: US 2021/0340649 A1
- Document ID: US20210340649A1
- Status: Published application
- Kind: A1
- Application number: 17/283,017
- Filed: 2020-05-07
- Published: 2021-11-04
- Earliest claimed: 2019-05-08
- Assignees: Changshu Synergy Automobile Parts Co., Ltd
- Applicants: Changshu Synergy Automobile Parts Co., Ltd
- Inventors: Yasuhiro KUWAHARA
- Web page: https://patentgrep.com/patent/US20210340649A1

## CPC

- C22C 21/02: with silicon as the next major constituent
- C22C 1/026: {Alloys based on aluminium}
- C22C 1/06: with the use of special agents for refining or deoxidising
- C22F 1/043: of alloys with silicon as the next major constituent
- C22C: ALLOYS (treatment of alloys C21D, C22F)
- C22F: CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS (surface treatment of metallic material involving at least one process provided for in class C23 and at least one process covered by this subclass, C23F17/00)

## Abstract

The present invention discloses an alloy material and a manufacturing process of its bars. The technical solution of the present invention is: an alloy material, wherein it comprises, in mass %: Si, 0.8-1.2%; Fe,0- 0.5%; Cu, 0.15-0.6%; Mn, 0.2-0.8%; Mg, 0.6-0.1%; Cr, 0-0.1%; Zn, 0-0.25%; Ti, 0-0.1%; the balance is Al. The Si content is 1.11%. The Mn content is 0.69%. A manufacturing process of an alloy material, wherein it comprises the following steps: (1) Weighing the raw material of each component by mass percentage; (2) Placing the raw material in a melting furnace and smelt it into an alloy liquid, until the temperature of the alloy liquid reaches 705-750° C., keeping for 45-60 minutes; (3) After the alloy liquid temperature falls to 520-580° C., add refining agent, heat up to 670-710° C., and carry out composition inspection; (4). After the alloy liquid is cooled down to 650-660° C. by holding, it is poured into molds where the bars are formed by cooling. According to the solution provided by the invention, the alloy has high tensile strength and yield strength.

## Claims

### Claim 1

An alloy material, wherein it comprises, in mass %:
Si, 0.8-1.2%;
Fe,0-0.5%;
Cu, 0.15-0.6%;
Mn, 0.2-0.8%;
Mg, 0.6-0.1%;
Cr, 0-0.1%;
Zn, 0-0.25%;
Ti, 0-0.1%; the balance is Al.

### Claim 2 (depends on 1)

The alloy material according to claim 1, wherein the Si content is 1.11%.

### Claim 3 (depends on 1)

The alloy material according to claim 1, wherein the Mn content is 0.69%.

### Claim 4

A manufacturing process of an alloy material, wherein it comprises the following steps:
(1) Weighing the raw material of each component by mass percentage;
(2) Placing the raw material in a melting furnace and smelt it into an alloy liquid, until the temperature of the alloy liquid reaches 705-750° C., keeping for 45-60 minutes;
(3) After the alloy liquid temperature falls to 520-580° C., add refining agent, heat up to 670-710° C., and carry out composition inspection;
(4) After the alloy liquid is cooled down to 650-660° C. by holding, it is poured into molds where the bars are formed by cooling.

### Claim 5 (depends on 4)

The manufacturing process of an alloy material according to claim 4, wherein: in the step (2), the melting furnace is heated up to 705-750° C. at a rate of 260-280° C./h.