Preparation method and application for hypo eutectic aluminum-silicon alloy slab

A technology of aluminum-silicon alloy and aluminum-silicon intermediate alloy, which is applied in the field of preparation of hypoeutectic aluminum-silicon alloy slabs, can solve problems such as unfavorable mechanical properties, segregation, and coarse structure, so as to reduce production costs, overcome middle line segregation, The effect of improving the yield rate

Active Publication Date: 2018-11-16
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the defects existing in the prior art, such as: segregation, coarse structure, unfavorable mechanical properties for rolling, etc. The present invention provides a method for preparing a hypoeutectic aluminum-silicon alloy cast-rolled slab

Method used

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  • Preparation method and application for hypo eutectic aluminum-silicon alloy slab
  • Preparation method and application for hypo eutectic aluminum-silicon alloy slab

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Effect test

Embodiment 1

[0027] (1) The chemical composition of the hypoeutectic aluminum-silicon alloy cast-rolled slab of this embodiment is calculated by mass percentage, as shown in Table 2:

[0028] Table 2 The chemical composition table of the hypoeutectic aluminum-silicon alloy cast-rolled slab unit: %

[0029]

[0030] (2) Melting:

[0031] According to the composition of the aluminum alloy in the step (1), the furnace charge of the aluminum alloy smelting furnace satisfying the capacity of 20t is configured, and the chemical composition is in accordance with the adjusted chemical composition range of the 4343 aluminum alloy;

[0032] Add industrial aluminum ingot (99.70wt.%) and aluminum-silicon master alloy to the smelting furnace first, bury the aluminum-silicon master alloy in the middle of the aluminum ingot, heat and melt, and control the melting temperature at 720°C; The hydrogen content in the melt is controlled within 0.15mL / 100gAl; after the aluminum ingot is completely melted, s...

Embodiment 2

[0039] (1) The chemical composition of the hypoeutectic aluminum-silicon alloy cast-rolled slab of this embodiment is calculated by mass percentage, as shown in Table 3:

[0040] Table 3 The chemical composition table of the hypoeutectic aluminum-silicon alloy cast-rolled slab unit: %

[0041]

[0042] (2) Melting:

[0043]According to the composition of the aluminum alloy in the step (1), the furnace charge of the aluminum alloy smelting furnace satisfying the capacity of 20t is configured, and the chemical composition is in accordance with the adjusted chemical composition range of the 4343 aluminum alloy;

[0044] Add industrial aluminum ingot (99.70wt.%) and aluminum-silicon master alloy to the smelting furnace first, bury the aluminum-silicon master alloy in the middle of the aluminum ingot, heat and melt, and control the melting temperature at 750°C; The hydrogen content in the melt is controlled within 0.15mL / 100gAl; after the aluminum ingot is completely melted, st...

Embodiment 3

[0051] (1) The chemical composition of the hypoeutectic aluminum-silicon alloy cast-rolled slab of this embodiment is calculated by mass percentage, as shown in Table 4:

[0052] Table 4 The chemical composition table of the hypoeutectic aluminum-silicon alloy cast-rolled slab Unit: %

[0053]

[0054] (2) Melting:

[0055] According to the composition of the aluminum alloy in the step (1), the furnace charge of the aluminum alloy smelting furnace satisfying the capacity of 20t is configured, and the chemical composition is in accordance with the adjusted chemical composition range of the 4343 aluminum alloy;

[0056] Add industrial aluminum ingot (99.70wt.%) and aluminum-silicon master alloy to the smelting furnace first, bury the aluminum-silicon master alloy in the middle of the aluminum ingot, heat and melt, and the melting temperature is controlled at 780°C; The hydrogen content in the melt is controlled within 0.15mL / 100gAl; after the aluminum ingot is completely mel...

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Abstract

The invention belongs to the technical field of processing of aluminum alloy plate sheets, and particularly relates to a preparation method and application for a hypo eutectic aluminum-silicon alloy slab. The method for preparing the hypo eutectic aluminum-silicon alloy slab comprises the following steps that an alloy is prepared by adopting an industrial pure aluminum ingot, an aluminum-silicon intermediate alloy and other alloy element additives, after melting is carried out in a melting furnace, a slagging agent and a refining agent are added separately, and then refining treatment is carried out; obtained metal melt is guided into a still furnace, a modificator and the refining agent are added, then secondary refining treatment is carried out, and a titanium wire is added and is guidedinto a degasification tank and a filter tank; aluminum alloy liquid is guided into the degasification tank, and cast rolling treatment is carried out so as to obtain an aluminum-silicon alloy cast-rolling blank; and uniform annealing treatment is carried out so as to obtain the hypo eutectic aluminum-silicon alloy cast-rolled slab. According to the preparation method and application for the hypoeutectic aluminum-silicon alloy slab, the melt treatment quality and efficiency are improved, so that the technological parameters are changed and optimized, and therefore the yield is increased, andthe production cost is lowered; and meanwhile, the material plasticity and machinability of the slab prepared through the method are enhanced, and the slab is expected to be widely used for processingthe cold-rolled sheets.

Description

technical field [0001] The invention belongs to the technical field of processing aluminum alloy plates and strips, and in particular relates to a preparation method and application of a hypoeutectic aluminum-silicon alloy slab. Background technique [0002] Hypoeutectic aluminum-silicon alloy has the advantages of low melting point, high ductility, and good melt filling performance. It can be used as brazing solder. The brazing sheet and strip processed by aluminum-silicon alloy are widely used in automobiles, Production of radiator components such as air conditioners. Due to the segregation of eutectic silicon and the possible precipitation of primary silicon in the structure of hypoeutectic Al-Si alloy, the material is more brittle and has certain difficulties in deformation processing. [0003] At present, ingot casting and hot rolling are usually used in industry to produce hypoeutectic Al-Si alloy slab materials, which requires high equipment investment and high energ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/03C22F1/043B21C37/02C22C21/02
CPCB21C37/02C22C1/026C22C1/03C22C21/02C22F1/043
Inventor 潘秋红尹小丹胡佳琪安彤舸刘冲冲石燕菲郑帅
Owner JIANGSU UNIV
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