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Preparation method of modified cast aluminium alloy used for automobile safety parts

A technology of automobile safety and aluminum alloy, which is applied in the field of non-ferrous metal material preparation, can solve problems such as bonding, achieve excellent elongation and yield strength, and improve the effect of service life and safety factor

Inactive Publication Date: 2015-06-10
TIANJIN LIZHONG ALLOY GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The invention overcomes the problems of the prior art that it will bond with the aluminum alloy liquid at high temperature and release impurities such as silicon and iron in the refractory material into the aluminum alloy liquid

Method used

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  • Preparation method of modified cast aluminium alloy used for automobile safety parts
  • Preparation method of modified cast aluminium alloy used for automobile safety parts
  • Preparation method of modified cast aluminium alloy used for automobile safety parts

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preparation example Construction

[0034] A method for preparing metamorphic aluminum alloys for automotive safety parts, including the preparation of refined and metamorphic parent aluminum alloy liquid and the preparation of new micro-modified hypoeutectic aluminum alloy materials, which are respectively described below:

[0035] 1. The preparation of Al+Sb+Ti refinement and modification parent aluminum alloy solution provides two examples in total:

Embodiment 1

[0037] Prepare master aluminum alloy liquid according to Ti: 4-5%, Sb: 4-5%, Al: 90-92%

[0038] ⑴Weigh 120Kg of titanium agent (75% Ti content) and 90Kg of metal antimony according to the mass percentage of elements in the parent aluminum alloy liquid: Ti: 4-5%, Sb: 4-5%, Al: 90-92%, respectively, and remelt Aluminum ingot 1790Kg;

[0039] (2) Weigh ST-1 flux according to 0.3-0.5% of the total feed, weigh ST-1S covering agent according to 0.3-0.5% of the total feed, and weigh ST-sodium-free refining agent according to 0.1-0.2% of the total feed;

[0040] (3) Put all the raw materials in step (1) and step (2) into a constant temperature waste heat drying oven at a temperature of 200-250°C and dry for 3-4 hours;

[0041] (4) Evenly spread the completely dried ST-1 flux in step (3) on the furnace bottom of the melting furnace, and then put it into the remelted aluminum ingot taken out after being dried in a constant temperature waste heat drying furnace;

[0042] (5) Ignite th...

Embodiment 2

[0048] Prepare master aluminum alloy liquid according to Ti: 5-6%, Sb: 5-6%, Al: 88-90%

[0049]The difference between this embodiment and Example 1 is that the parent aluminum alloy solution in step (1) weighs the titanium agent respectively according to the mass percentage of elements Ti: 5-6%, Sb: 5-6%, Al: 88-90% ( Ti content 75%) 147Kg, metal antimony 110Kg, remelted aluminum ingot 1743Kg; Step ⑻ determines the composition of the mother liquor: Ti: 5.52%, Sb: 5.51%, Al: the balance.

[0050] Others are the same as in Example 1.

[0051] 2. The preparation of a new type of refined metamorphic hypoeutectic aluminum alloy material, four examples are provided in total. Among them, embodiment 1 and embodiment 2 adopt the master aluminum alloy liquid prepared in embodiment 1 of Al+Sb+Ti refinement and modification master aluminum alloy liquid; embodiment 3 and embodiment 4 adopt Al+Sb+Ti refinement modification Aluminum alloy liquid The master aluminum alloy liquid prepared i...

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Abstract

The invention relates to a preparation method of a modified aluminium alloy used for automobile safety parts. The preparation method comprises the steps of preparation of a refined and modified master aluminium alloy liquid and preparation of a novel refined and modified hypoeutectic aluminium alloy material. The alloy material has the advantages of high-temperature wear resistance, high-temperature fatigue resistance, high strength, high toughness, and the like, is used for manufacturing automobile safety parts, such as rear brake calipers, brake master cylinders and steering cases, and has the effects of greatly prolonging the service lives of the automobile parts and improving the safety factors of automobiles; the mechanical properties of the novel refined and modified hypoeutectic aluminium alloy material are detected after thermal treatment of the novel refined and modified hypoeutectic aluminium alloy material and are close to the standards (the tensile strength is not less than 400MPa) of the mechanical properties of high-strength aluminium alloys while the elongation and yield strength of the novel refined and modified hypoeutectic aluminium alloy material are far higher than those of high-strength hard aluminium alloys.

Description

technical field [0001] The invention belongs to the field of non-ferrous metal material preparation technology and metamorphic treatment process, and in particular relates to a preparation method of metamorphic aluminum alloy for automobile safety parts. Background technique [0002] Metal structure refinement is one of the ways to improve the mechanical properties of metal materials, and it is also the only way to improve the plasticity index of materials without sacrificing the strength index of the material. , [0003] By searching, only the following two published patent documents related to this patent application were found: [0004] 1. A large-diameter casting aluminum alloy hydraulic coupling impeller heat treatment process (CN101148744), which is characterized in that it consists of the following steps: preparing the large-diameter casting aluminum alloy hydraulic coupling impeller before heat treatment, and large-diameter casting aluminum alloy The impeller of th...

Claims

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Application Information

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IPC IPC(8): C22C21/04
CPCC22C21/04C22C1/026C22C1/06
Inventor 王如芬李志琴郭强冯啸姜淑珍霍会娟
Owner TIANJIN LIZHONG ALLOY GROUP
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