Aluminum alloy material for hot precision forging connection rod and preparation method thereof

An aluminum alloy material and hot precision forging technology are applied in the field of aluminum alloy materials for hot precision forging connecting rods and their preparation. effect of densification, improvement of strength and toughness indicators, and densification of tissue

Inactive Publication Date: 2011-03-16
江苏万里活塞轴瓦有限公司
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  • Abstract
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Problems solved by technology

[0003] The present invention mainly aims at the defects of coarse grain, poor plasticity, low strength, poor toughness and inability to forge existing aluminum alloy castings, and proposes a method of adding a small amount of rare earth alloy to the aluminum alloy melt to denature it to form a hot precision forging connecting rod. Aluminum alloy material is used for castings with refined grains, dense metallographic structure, wear resistance and corrosion resistance, and can significantly improve strength and toughness after forging

Method used

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Embodiment Construction

[0021] The present invention is further illustrated below by way of examples.

[0022] The aluminum alloy material used for hot precision forging connecting rods in this example, the components are measured by weight percentage, wherein Si0.9%, Fe0.4%, Cu4.3%, Mn0.7%, Mg0.6%, Zn0.15% , Ti0.08%, Re1.0%, Er0.15%, Zr0.11%, Al91.6% and impurity 0.1%. In the present invention, a rare earth composite additive mixed with Re, Er and Zr is added, the total amount of which accounts for 0.65-1.45% of the components, and the Re used is mainly Ce and La is auxiliary. In this embodiment, Re contains 76% Ce and 24% La.

[0023] The preparation method of aluminum alloy material for hot precision forging connecting rod is as follows:

[0024] 1. Melting: Put the aluminum alloy material formulated according to the composition into the furnace to melt and perform purification treatment. The melting temperature is 730±15°C;

[0025] 2. Denaturation treatment: add a rare earth composite additiv...

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Abstract

The invention discloses an aluminum alloy material for a hot precision forging connection rod. The aluminum alloy material comprises the following components in percentage by weight: 0.6-1.2% of Si, 0.1-0.7% of Fe, 3.8-4.7% Cu, 0.4-1% of Mn, 0.4-0.8% of Mg, 0.01-0.3% of Zn, 0.01-0.15% of Ti, 89.5-93.6% of Al, 0.05-0.1% of impurities and 0.65-1.45% of a rare earth composite additive containing a mixture of Re, Er and Zr. The rare earth composite additive is the mixture of Re, Er and Zr. The Re contains 75-80% of Ce and 20-25% of La. The invention also discloses a preparation method of the material, comprising the following steps: smelting at the temperature of 710-750 DEG C; adding the rare earth composite additive into the solution, stirring, preserving heat and pouring; fetching out the casting and forging at 400-420 DEG C; and finally performing annealing, solution treatment, quenching and artificial aging. The invention has the advantage that the mechanical performance of the casting by forging at low cost.

Description

technical field [0001] The invention relates to a nonferrous alloy material and a preparation method thereof, in particular to an aluminum alloy material for hot precision forging connecting rods and a preparation method thereof. Background technique [0002] The connecting rod is the main moving part of the piston diesel engine, gasoline engine and compressor. One end is connected to the crankshaft, and the other end is connected to the piston through the piston pin. The quality of the connecting rod directly affects the performance of the whole machine. From the perspective of performance parameters such as specific strength and specific modulus, the materials suitable for making connecting rods are titanium, magnesium, aluminum and iron. For civil engines, the main factor restricting the selection of connecting rod materials is price. Among the above-mentioned metal materials, aluminum has low density, light weight, high strength, and the cheapest price. Therefore, alumi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C1/02C22F1/04
Inventor 李曙生李羊林黄光华
Owner 江苏万里活塞轴瓦有限公司
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