Casting method for improving mechanical property of large-size aluminum alloy wheel

An aluminum alloy, large-size technology, applied in the field of aluminum alloy casting, can solve problems such as insufficient feeding, achieve the effects of improving feeding ability, enhancing feeding, and eliminating defects

Active Publication Date: 2019-10-08
QINGDAO RES INST OF BEIHANG UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention aims at the problem of insufficient feeding of large-sized aluminum alloy automobile wheels in the low-pressure casting process, and proposes a casting method for improving the mechanical properties of large-sized aluminum alloy automobile wheels. The casting method adopts a large gradient in the direction from the wheel core to the spokes. Cooling design and pressurized feeding combined with solidification path of castings

Method used

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  • Casting method for improving mechanical property of large-size aluminum alloy wheel
  • Casting method for improving mechanical property of large-size aluminum alloy wheel
  • Casting method for improving mechanical property of large-size aluminum alloy wheel

Examples

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Effect test

Embodiment 1

[0034] Embodiment 1: a kind of casting method that improves the mechanical properties of large-size aluminum alloy automobile wheels

[0035] The implementation object is a certain 20-inch car wheel, the material is A356.2 alloy, and the composition range is shown in Table 1. Common defects when this wheel is produced using conventional low pressure casting are spoke defects and "R" corner defects. The spoke defects are mainly due to the thin wall thickness of the spokes of this type of wheel. When the mold temperature field is not controlled properly, the surrounding areas of the thin spoke area will solidify first, and the area where the thin area is solidified later will cause shrinkage due to the lack of aluminum liquid feeding. . The "R" angle defect mainly occurs at the junction of the wheel spoke and the rim, where the hot joint is thick and is the transition area between the thin and thick castings. This part often forms shrinkage defects due to lack of feeding.

[0...

Embodiment 2

[0053] Example 2: A casting method for improving the mechanical properties of large-size aluminum alloy automobile wheels

[0054] The implementation object is a certain 20-inch car wheel, the material is A356.2 alloy, and the composition range is shown in Table 1. The common defects of this wheel produced by conventional low pressure casting are similar to those of Example 1, mainly spoke defects and "R" corner defects.

[0055] The wheel described in Example 2 is trial-produced according to the method of the present invention, and the cooling layout of the wheel mold is shown in the appendix. image 3 shown, the specific usage is as follows:

[0056] Pretreatment: A356.2 aluminum ingot is melted, refined (refined and deteriorated), and degassed. The composition of molten aluminum meets the range in Table 1, and the density is 2.61g / cm 3 ; After the mold is sandblasted and sprayed with paint, it is heated to 365 ℃ and then put on the machine.

[0057] Liquid rising stage: ...

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Abstract

The invention discloses a casting method for improving the mechanical property of a large-size aluminum alloy wheel. The casting method is characterized by comprising the following steps that in the liquid lifting stage, aluminum liquid in a heat preservation furnace is lifted to the position near a sprue of a wheel mold; air cooling of the position, close to an inner rim, of an upper mold of thewheel mold is opened; a mold cavity is stably filled with aluminum liquid near the sprue in a mold filling stage; water cooling of the position, close to an outer rim, of a side mold of the wheel moldis opened; a rapid supercharging mode is adopted in a supercharging stage; pressure is maintained; when the solidification front edge is pushed to a spoke area of the wheel mold, water cooling and air cooling of the position, close to a spoke, of the upper mold are opened; cooling water at a diversion cone is opened; after the spoke portion completes solidification, water cooling at the position,close to a wheel boss, of a lower mold of a road mold is opened; and cooling is carried out, the mold is opened, and a casting is ejected out. Common R corner defects in low-pressure cast wheels canbe effectively eliminated, the mechanical properties of two key parts comprising the wheel boss and the spoke are remarkably improved, and the casting method is particularly suitable for producing large-size aluminum alloy wheels.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy casting, and in particular relates to a casting method for improving the mechanical properties of large-size aluminum alloy wheels, more particularly, a casting method that can greatly improve aluminum alloy wheels, especially large-size aluminum alloy wheel cores and Methods for the mechanical properties of the spoke parts. Background technique [0002] Car wheels are very important bearing and security parts, which directly affect the handling, braking, stability and comfort of the whole vehicle. The service environment of wheels requires high bearing capacity, high fatigue, high precision and low weight. In the past, automobile wheels were mostly made of steel materials. Now, with the accelerating process of automobile lightweighting and the prominent advantages of aluminum alloy wheels in dimensional accuracy, heat dissipation, vehicle safety, and style, aluminum wheels are gradually b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D18/04B22D18/08C22C21/02
CPCB22D18/04B22D18/08C22C21/02
Inventor 宋炜范震张花蕊张虎
Owner QINGDAO RES INST OF BEIHANG UNIV
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