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Liquid die forging process of a357 aluminum alloy applied to commercial vehicle axle heads

A technology of A357 and liquid die forging, which is applied in the field of liquid die forging process of A357 aluminum alloy, can solve the problems of no application of rare earth elements, etc., achieve obvious economic and social benefits, improve the appearance quality, and increase the tensile strength.

Active Publication Date: 2018-02-16
辽宁忠相铝业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, in the prior art, rare earth elements have not been applied to the field of liquid die forging of aluminum alloys.

Method used

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  • Liquid die forging process of a357 aluminum alloy applied to commercial vehicle axle heads
  • Liquid die forging process of a357 aluminum alloy applied to commercial vehicle axle heads

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037](1) Alloy composition optimization: optimize the ratio of Mg / Si and other alloy elements in A357 aluminum alloy, and control the mass content of impurity elements, including Si7 parts; Fe<0.1 parts; Cu<0.1 parts; Mg0.6 parts; 0.02 parts of Sr; 0.2 parts of Ti; 95 parts of Al, control the other individual impurities in A357 aluminum alloy to ≤0.04 parts, then add 0.3 parts of Gd; 0.5 parts of Sm; 1 part of Hf, use Sr and Ti for modification and refinement treatment; In this step, it is necessary to strictly control the amount of Gd and Sm added, because adding too much will not only not improve the performance of the aluminum alloy, but also affect the normal use of the aluminum alloy, and even cause the scrap of the material;

[0038] (2) Melting;

[0039] (3) The melt obtained in step (2) is degassed and slag-removed in the furnace with a high-efficiency refining agent to make the melt clean and free of impurities; removing impurities and gases inside the aluminum alloy...

Embodiment 2

[0051] (1) Alloy composition optimization: optimize the Mg / Si ratio and the ratio of other alloying elements in the A357 aluminum alloy, and control the mass content of impurity elements, of which Si6.5 parts; Fe<0.2 parts; Cu<0.2 parts; Mg0.5 0.01 parts of Sr; 0.15 parts of Ti; 90 parts of Al, control other single impurities in A357 aluminum alloy to ≤0.05 parts, then add elements Gd0.1 part; Sm0.1 part; Hf0.1 part, use Sr and Ti as modification and refinement;

[0052] (2) Melting;

[0053] (3) The melt obtained in step (2) is degassed and slag-removed in the furnace with a high-efficiency refining agent to make the melt clean and free of impurities;

[0054] (4) Liquid die forging is divided into 5 stages

[0055] The first stage: the melt is poured into the shaft head mold: the pouring temperature is 680°C, the mold preheating temperature is 320°C, and the single billet is poured accurately and quantitatively;

[0056] The second stage: fast filling: the pressurization ...

Embodiment 3

[0064] (1) Alloy composition optimization: optimize the ratio of Mg / Si and other alloy elements in the A357 aluminum alloy, and control the mass content of impurity elements, including Si7.5 parts; Fe<0.15 parts; Cu<0.15 parts; Mg0.6 0.015 parts of Sr; 0.1 parts of Ti; 93 parts of Al, control the other individual impurities in A357 aluminum alloy to ≤0.03 parts, then add 0.5 parts of Gd; 0.5 parts of Sm; treatment;

[0065] (2) Melting;

[0066] (3) The melt obtained in step (2) is degassed and slag-removed in the furnace with a high-efficiency refining agent to make the melt clean and free of impurities;

[0067] (4) Liquid die forging is divided into 5 stages

[0068] The first stage: the melt is poured into the shaft head mold: the pouring temperature is 680°C, the mold preheating temperature is 280°C, and the single billet is poured accurately and quantitatively;

[0069] The second stage: fast filling: the pressurization time of mold closing is 15 seconds, and the pres...

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Abstract

The invention discloses a liquid die forging process for an A357 aluminum alloy applied to a commercial vehicle axle head, which mainly includes the following steps: alloy composition optimization—smelting—melt purification—liquid die forging forming—demolding, edge trimming, and hole exit - heat treatment strengthening - mechanical processing - surface treatment. The present invention first optimizes the composition of each element in the A357 alloy, and then adds an appropriate amount of rare earth elements Gd, Sm, and element Hf, and then combines the liquid die forging process to prepare the axle head for vehicles, and optimizes the chemical composition and melt of the alloy The purification technology improves the metallographic structure of the alloy, and greatly eliminates internal defects such as shrinkage cavities, porosity, pores, and cracks in the product. The appearance quality of the shaft head product is significantly improved, the internal defects are significantly reduced, the production efficiency is high, the process is short, the process cost is low, energy saving, less environmental pollution, and the economic and social benefits are obvious.

Description

technical field [0001] The invention belongs to the field of liquid die forging, and in particular relates to a liquid die forging process method for an A357 aluminum alloy applied to a commercial vehicle axle head. Background technique [0002] The shaft head is one of the most important safety parts on the car. The shaft head bears the pressure of the car and the load, the dynamic torque of the vehicle when it starts and brakes, and also bears the turning and uneven road surface during the driving process of the car. , road obstacle impact and other irregular alternating forces from extraordinary dynamic loads. The quality and reliability of the axle head is not only related to the safety of the vehicle and the personnel and materials on the vehicle, but also affects the stability, maneuverability, comfort and other performances of the vehicle during driving, which requires good dynamic balance of the axle head and fatigue strength. High, good rigidity and elasticity, hig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/04C22C1/06B22D18/02C22F1/043
CPCB22D18/02C22C1/06C22C21/04C22F1/002C22F1/043
Inventor 刘忠锁
Owner 辽宁忠相铝业有限公司
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