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Heat treatment process of a high-strength and wear-resistant al‑si‑cu alloy

A high-temperature heat treatment, al-si-cu technology, which is applied in the heat treatment process of high-strength and wear-resistant Al-Si-Cu alloys, can solve the difficulty in controlling the structure and properties of the alloy, reduce the wear resistance of the alloy, and reduce the plasticity and toughness. The problem is to achieve the effect of easy operation of heat treatment process, inhibition of quenching cracking tendency, workability and wear resistance.

Inactive Publication Date: 2018-01-19
内蒙古蒙东高新集团有限公司 +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, due to the complex composition of this type of alloy, various phase transitions may occur during heat treatment, forming a variety of second phases, including various strengthening phases and hard and brittle impurity phases, so it is difficult to control the structure and properties of the alloy. It is difficult for the system to fully utilize the potential of the alloy. Usually, the hardness and strength of the alloy are increased, and the plasticity and toughness of the alloy are significantly reduced, and vice versa.
Low strength and hardness will reduce the wear resistance of the alloy, and poor plasticity will affect subsequent processing and use

Method used

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  • Heat treatment process of a high-strength and wear-resistant al‑si‑cu alloy

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Embodiment

[0025] After batching (Al‐12.5%Si‐4.5%Cu‐1.2%Mg‐0.7%Zn‐0.3%Ni‐0.03%La‐0.03%Ce), resistance furnace melting, vertical semi-continuous casting, ordinary horizontal hot extrusion , A flat aluminum alloy strip obtained, and then deformed and heat-treated. See Table 1 for heat treatment process and microstructure and performance parameters of alloy products. In an embodiment of the present invention, 12.5% ​​Si means that the mass percentage of Si in the alloy is 12.5%, 4.5% Cu means that the mass percentage of Cu in the alloy is 4.5%, and 1.2% Mg means that the mass percentage of Mg in the alloy 1.2%, 0.7% Zn means the mass percentage of Zn in the alloy is 0.7%, 0.3% Ni means the mass percentage of Ni in the alloy is 0.3%, 0.03% La means the mass percentage of La in the alloy 0.03% and 0.03% Ce mean that the mass percentage of Ce in the alloy is 0.03%, and the balance is Al.

[0026] As can be seen from Table 1, Examples 1-6 were deformed and heat-treated according to the proces...

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Abstract

The invention belongs to the technical field of nonferrous material manufacturing, and particularly relates to a heat treatment process of high-strength wear-resistant Al-Si-Cu alloy. Through introducing intermediate cold deformation and warm water quenching, and through primary high-temperature processing and two times of annealing processing, a second phase in the alloy is uniformly dispersed and precipitated so as to fully play a role in reinforcement, the quench-cracking tendency of the alloy is effectively inhibited, and the alloy keeps better toughness. The Al-Si-Cu alloy extruded product obtained through treating by utilizing the heat treatment process provided by the invention has the room temperature tensile strength achieving 501MPa or above, the elongation achieving not less than 5 percent, and the average crystallite size achieving 0.020 to 0.035mm, and has an excellent wear-resisting property. Meanwhile, the heat treatment process provided by the invention can be applied in silicon aluminum alloy with the total content of alloy elements achieving not less than 18 weight percent.

Description

technical field [0001] The invention belongs to the technical field of manufacturing nonferrous metal materials, and in particular relates to a heat treatment process of a high-strength wear-resistant Al-Si-Cu alloy. Background technique [0002] Silicon-containing hard aluminum alloy has high strength, light weight and excellent wear resistance, and is widely used in engine pistons, various types of air-conditioning compressor blades and impellers and other wear-resistant parts. The invention patent [ZL201210313325.6] discloses an alloy-like composition. However, due to the content of alloying elements as high as 15-25%, this kind of aluminum alloy has high hardness and strength, high brittleness, and it is difficult to realize its plastic processing. It is usually prepared by powder metallurgy, which greatly restricts its application in various aspects. At present, the solution adopted by some enterprises is to appropriately reduce the alloy content to improve the plastic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/043C22C21/02
CPCC22C21/02C22F1/002C22F1/043
Inventor 季金力林高用王晶莉赵思宇
Owner 内蒙古蒙东高新集团有限公司
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