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Energy-saving and short-flow manufacturing method of wheel hub with in situ particle reinforced A356 matrix composite material

A manufacturing method and particle-enhancing technology, applied in the field of energy-saving short-process in-situ particle-enhanced A356 alloy wheel manufacturing, can solve the problems of difficult process control, uneven distribution of enhanced particles, easy agglomeration of enhanced particles, etc., to eliminate casting stress, reduce The effect of investment and maintenance costs

Active Publication Date: 2010-06-30
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current common in-situ reaction synthesis process often requires a relatively high reaction temperature (above 1000 ° C), and the process is not easy to control, resulting in difficulty in controlling the size and shape of the reinforcing particles, easy agglomeration of the reinforcing particles, and poor distribution of the reinforcing particles in the matrix. Disadvantages such as uniformity greatly limit industrial applications

Method used

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  • Energy-saving and short-flow manufacturing method of wheel hub with in situ particle reinforced A356 matrix composite material
  • Energy-saving and short-flow manufacturing method of wheel hub with in situ particle reinforced A356 matrix composite material
  • Energy-saving and short-flow manufacturing method of wheel hub with in situ particle reinforced A356 matrix composite material

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Effect test

Embodiment 1

[0029] A356 alloy melt is prepared from pure metal Al, Mg and crystalline silicon by one-time melting, K 2 ZrF 6 and KBF 4 The purity of the powder is 99.9%. Its preparation process is as follows: raw material preparation→in-situ particle melt preparation→modification, refining→pouring, cooling molding→heat treatment. Specifically: first put K 2 ZrF 6 and KBF 4 The powder is baked in a drying oven at 250°C for 3 hours to remove moisture; the pure metal Al, Mg, and crystalline silicon are smelted once to prepare an A356 alloy melt, and overheated to 850°C; then 20% of the mass of the A356 melt ( K2 ZrF 6 +KBF 4 ) powder (wherein K 2 ZrF 6 、KBF 4 The ratio of the powder is 1:1 (mass percentage)) is pressed into the melt in batches with a bell jar; The width is 10ms, and the pulsed magnetic field is applied intermittently for 20 minutes; after the reaction is completed, it is modified and refined, and left to stand for 10 minutes to remove slag; it is poured into a met...

Embodiment 2

[0031] The A356 alloy melt is prepared from pure metal Al and Mg, and crystalline silicon by one-time melting, Zr(CO 3 ) 2 The purity of the powder is 99.9%. Its preparation process is as follows: raw material preparation→in-situ particle melt preparation→modification, refining→pouring, cooling molding→heat treatment. Specifically: Zr(CO 3 ) 2 Put it in an electric oven and raise the temperature to 250°C, keep it warm for 3 hours, fully remove the water, then cool, grind, and sieve through a 70-mesh standard sieve to obtain a powder reaction agent with a particle size of 3 ) 2 Powder (addition amount is 20% of the mass of A356 alloy melt), the pulse magnetic field parameters are: current is 10A, voltage is 550V, frequency is 100kHz, pulse width is 10ms, and the pulse magnetic field action time is intermittently applied for 20min; then carry out metamorphism and refining treatment, stand still for 10min, and remove slag; put it into the holding furnace of the low-pressure c...

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Abstract

The invention relates to an energy-saving and short-flow manufacturing method of a wheel hub with an in-situ particle reinforced A356 alloy. The main features of the method are as follows: (1) A356 alloy melt is prepared with pure metals Al and Mg as well as crystalline silicon through one-step melting, in-situ multi-phase reinforcing particles of ZrB2 (or TiB2), Al3Zr (or Al3Ti) and Al2O3 are synthesized through reactions synthesis of the melt in a pulsed magnetic field, the sizes of a majority of particles are at the sub-micron (0.1-1mum) level, and the sizes of a minority of particles are at the micron (1-4mum) level; and (2) a wheel hub is formed through low-pressure casting or metal gravity casting of the synthesized composite material melt, no solid solution is needed, and next procedure can be carried out after direct artificial aging treatment, thereby realizing the short-flow thermal treatment. The novel method for manufacturing of the A356 alloy wheel hub in the invention not only can effectively improve the mechanical property of the aluminum wheel hub and prolong the service life of the aluminum wheel hub, but also can significantly reduce the solid solution heat treatment procedure, thereby greatly reducing the energy consumption and improving the production efficiency.

Description

technical field [0001] The invention relates to a new method for manufacturing an energy-saving short-process in-situ particle reinforced A356 alloy wheel hub, which belongs to a new material and a new manufacturing method for a light alloy wheel hub, in particular to a composite technology and a short-flow heat treatment process in the wheel hub manufacturing process. Background technique [0002] The wheel hub is one of the important key safety components of high-end cars, light buses, sports cars and other vehicles. In order to meet people's new requirements for more energy-saving, safer and more environmentally friendly cars, the wheel hub is developing in the direction of light weight, high strength, fatigue resistance, large diameter and more beautiful appearance. [0003] As a high-strength Al-Si-Mg alloy, A356 alloy has been widely used in the fields of automobiles and motorcycles, especially wheel hub parts. In 2008 alone, the domestic A356 aluminum alloy automobil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/02B22D27/02B22D1/00C22F1/04
Inventor 赵玉涛贾志宏陈刚张松利
Owner JIANGSU UNIV
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