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Aluminium allloy for casting/forging, aluminium alloy cast/forged product and producing methods

A manufacturing method and forging technology, applied in the field of casting and forging manufacturing, can solve the problems of no aluminum products, strength reduction, strength reduction, etc., and achieve the effects of reducing manufacturing costs, improving fuel consumption performance, and simplifying manufacturing processes.

Inactive Publication Date: 2004-09-15
ASAHI TEC CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] In this solution, it can be formed into a shape close to the final product during casting, and the extrusion process can be saved for forging, thereby reducing the manufacturing cost, but due to the excessive manganese content, there is a problem of reduced strength
Manganese is an element that increases strength by inhibiting the grain growth of aluminum and keeping its structure fine. However, when its content is too much, it is easy to cause intermetallic compounds to be formed, which will reduce the strength instead.
[0017] As mentioned above, aluminum products with excellent corrosion resistance, excellent mechanical properties such as strength and elongation, which can be safely used in automobile running parts, and low cost are required. However, no suitable aluminum products have been proposed yet.

Method used

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  • Aluminium allloy for casting/forging, aluminium alloy cast/forged product and producing methods
  • Aluminium allloy for casting/forging, aluminium alloy cast/forged product and producing methods
  • Aluminium allloy for casting/forging, aluminium alloy cast/forged product and producing methods

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] figure 1 It is a diagram showing an example of the aluminum cast forging of the present invention, and it is a steering knuckle 40 as an automobile component.

[0068] A small amount of manganese is added to the scrap of A6061 alloy to prepare raw materials containing 0.6% by weight of silicon, 0.8% by weight of magnesium, 0.2% by weight of copper, and 0.03% by weight of manganese. Based on this, the following procedures are used to manufacture figure 1 The shape of the steering knuckle 40 is described.

[0069] After melting the raw material at a melting temperature of 728°C to obtain a molten metal, when the shape of the final steering knuckle 40 is taken as 100%, using a mold having a shape with a processing rate of 30% compared with it, the casting process is carried out at a mold temperature of 100°C. take shape. Secondly, at a rough forging temperature of 395° C. (surface temperature), die forging is carried out by applying a rough forging load of 2,770 tons to ...

Embodiment 2

[0075] Change the temperature conditions and load conditions, except that the molten metal temperature is 720°C, the mold temperature is 125°C, the rough forging temperature is 400°C, the rough forging load is 2730 tons, the precision forging temperature is 445°C, and the precision forging load is 3780 tons. Others are the same as in Example 1, a steering knuckle is manufactured, and its mechanical properties are studied.

[0076] Temperature conditions and load conditions are shown in Table 1 and Table 2. Table 3 shows the measurement results of mechanical properties.

[0077] As can be seen from the results of Example 1 and Example 2, it can be ensured that the mechanical properties of the aluminum casting forging of the present invention, such as tensile strength, yield strength, and elongation, are all higher than those produced in the forging process of the prior art. Specification value of A6061FD.

Embodiment 3

[0079] The same raw materials as in Example 1 were prepared to produce cylindrical test pieces. After melting at a melting temperature of 728° C. to obtain a molten metal, a raw material for forging is formed. When forging, the processing rate of crafting is changed to 5%, 12%, 15%, 18%, 27%, 30%, 37%, 41%, 45%, 51%, 60%, 67%, 73%, 80% of 14 products.

[0080] FIG. 2( a ) is a graph showing the difference in shape for each processing rate, and internal observations were carried out for forging raw materials (cylindrical test pieces) with different shapes.

[0081] As a result, as shown in FIG. 2( b ), internal defects remained in the raw material for forging with a working ratio of 13% or less. When the processing rate is 18% or more, all the internal defects are good as shown in Fig. 2(c).

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Abstract

An aluminum cast / forged product containing 0.2-2.0 wt.% of silicon, 0.35-1.2 wt.% of magnesium, 0.1-0.4 wt.% of copper and 0.01-0.08 wt.% of manganese, wherein the weight ratios of alloy elements are adjusted by using, as material, wasteful burr produced at forging so as to provide a sufficient strength, prevent the production of wasteful intermetallic compounds, restrict oxidization deterioration and corrosion, and further increase strength by a forging effect, while improving fluidity and castability. A method of producing an aluminum cast / forged product comprising a metal melting process, a casting process, and a rough forging / finish forging / trimming process, wherein production processes are simpler with higher yield and productivity. As an aluminum thick-wall worked product high in tensile strength, yield strength and elongation, and improved in mechanical properties over conventional cast / forged products, this aluminum cast / forged product is excellent in corrosion-resistance, high in quality without defects, and low in cost.

Description

technical field [0001] The present invention relates to an aluminum alloy for casting and forging, an aluminum alloy casting and forging, and a method for manufacturing an aluminum alloy casting and forging, which are used in vehicle parts and the like, and whose costs are desired to be further reduced. More specifically, it relates to an aluminum alloy for casting and forging that can use useless forging materials such as burrs generated in the forging process as raw materials for the manufacture of running parts for vehicles to improve the fuel consumption performance of automobiles and achieve weight reduction, and Excellent mechanical properties, aluminum casting and forging containing specific amounts of silicon, magnesium, copper, and manganese, and a method for manufacturing the aluminum casting and forging. Background technique [0002] As one of the global environmental problems, global warming has a great impact on all human activities, and the impact of carbon dio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J5/00B21J5/02B21K1/26B62D7/18C22C21/02C22C21/06C22C21/08C22F1/00C22F1/05
CPCC22C21/08B21J5/002B21J5/00B60G2206/20B60G2206/10B60G2206/7102B21K1/26B21J5/02B60G2206/81022C22C21/02B62D7/18B60G2206/7103B60G2206/8101B60G2206/50
Inventor 松本政治渡部正利町野大辅
Owner ASAHI TEC CORP
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