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Preparation method of easy-cutting aluminum alloy extrusion rod without coarse grain rings

A technology of aluminum alloy and coarse-grained ring, which is applied in the field of preparation of free-cutting aluminum alloy extruded bar without coarse-grained ring

Active Publication Date: 2020-06-19
广东领胜新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the existing preparation methods of free-cutting aluminum alloy extruded rods still need to be improved and developed.

Method used

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  • Preparation method of easy-cutting aluminum alloy extrusion rod without coarse grain rings
  • Preparation method of easy-cutting aluminum alloy extrusion rod without coarse grain rings
  • Preparation method of easy-cutting aluminum alloy extrusion rod without coarse grain rings

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066]A free-cutting aluminum alloy extruded rod, composed of the following components in mass percentage: Cu 2.1%, Mg 1.8%, Zn 2.9%, Sn 0.19%, Bi 0.41%, V 0.15%, Ba 0.09%, Nb 0.015% %, C 0.003%, Fe 0.14%, the balance is Al and unavoidable impurity elements, the individual content of impurity elements is ≤0.05%, and the total amount of impurity elements is ≤0.15%;

[0067] Its preparation method comprises the following steps in turn:

[0068] (1) According to the composition and mass percentage of aluminum alloy extruded rods, aluminum ingots with an aluminum content of 99.85%, magnesium ingots with a magnesium content of 99.9%, zinc ingots with a zinc content of 99.9%, Al-20Cu alloy, Al-5Sn Alloy, Al-5Bi alloy, Al-10V alloy, Al-10Ba alloy and Al-5Nb-1C alloy wire are used as raw materials for batching;

[0069] (2) Use an aluminum melting furnace with electromagnetic stirring function at the bottom of the furnace to heat and melt the aluminum ingot at 785 ° C, and then add A...

Embodiment 2

[0079] A free-cutting aluminum alloy extruded bar, composed of the following components in mass percentage: Cu 2.2%, Mg 1.7%, Zn 3.2%, Sn 0.15%, Bi 0.45%, V 0.14%, Ba 0.08%, Nb 0.02 %, C 0.004%, Fe 0.13%, the balance is Al and unavoidable impurity elements, the individual content of impurity elements is ≤0.05%, and the total amount of impurity elements is ≤0.15%;

[0080] Its preparation method comprises the following steps in turn:

[0081] (1) According to the composition and mass percentage of aluminum alloy extruded rods, aluminum ingots with an aluminum content of 99.85%, magnesium ingots with a magnesium content of 99.9%, zinc ingots with a zinc content of 99.9%, Al-20Cu alloy, Al-5Sn Alloy, Al-5Bi alloy, Al-10V alloy, Al-10Ba alloy and Al-5Nb-1C alloy wire are used as raw materials for batching;

[0082] (2) Use an aluminum melting furnace with electromagnetic stirring function at the bottom of the furnace to heat and melt aluminum ingots at 780 ° C, and then add Al-20...

Embodiment 3

[0092] A free-cutting aluminum alloy extruded rod, composed of the following components in mass percentage: Cu 1.9%, Mg 1.9%, Zn 2.7%, Sn 0.25%, Bi 0.35%, V 0.17%, Ba 0.12%, Nb 0.01 %, C 0.002%, Fe 0.13-0.16%, the balance is Al and unavoidable impurity elements, the content of individual impurity elements is ≤0.05%, and the total amount of impurity elements is ≤0.15%;

[0093] Its preparation method comprises the following steps in turn:

[0094] (1) According to the composition and mass percentage of aluminum alloy extruded rods, aluminum ingots with an aluminum content of 99.85%, magnesium ingots with a magnesium content of 99.9%, zinc ingots with a zinc content of 99.9%, Al-20Cu alloy, Al-5Sn Alloy, Al-5Bi alloy, Al-10V alloy, Al-10Ba alloy and Al-5Nb-1C alloy wire are used as raw materials for batching;

[0095] (2) Use an aluminum melting furnace with electromagnetic stirring function at the bottom of the furnace to heat and melt aluminum ingots at 790 ° C, and then add ...

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Abstract

The invention provides a preparation method of an easy-cutting aluminum alloy extrusion rod without coarse grain rings. The preparation method comprises the following steps of conducting material mixing according to the composition and mass percentages of components of an aluminum alloy; conducting electromagnetic stirring, and melting the mixture into an aluminum alloy solution; conducting in-furnace powder spraying, refining, degassing and impurity removing; conducting online grain refinement treatment; conducting online degassing and filtering treatment; conducting ultrasonic vibration andsemi-continuous casting; conducting homogenizing treatment on a cast rod; heating the cast rod, and conducting extrusion molding; drawing and straightening the cast rod; and conducting artificial aging treatment. According to the preparation method, through optimization design of the preparation process and parameters of the aluminum alloy extrusion rod and by inhibiting growth of recrystallized grains and eliminating the defects of coarse grain ring structures of the extrusion rod, the extrusion rod can have the fine and uniform grain structure, the homogeneity of the structure performance ofthe extrusion rod is improved, and the aluminum alloy extrusion rod has the excellent mechanical performance and machinability.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy preparation, and in particular relates to a preparation method of free-cutting aluminum alloy extruded rods without coarse crystal rings. Background technique [0002] Easy-cutting aluminum alloy refers to the aluminum alloy that chips are easy to break, does not stick to the knife, does not wrap around the knife, and is easy to remove chips. Free-cutting aluminum alloys can be processed with higher chip processing speed or larger feed rate, which significantly improves the production efficiency of cutting processing, and is also conducive to obtaining aluminum alloy parts with smoother surface and higher dimensional accuracy. Therefore, free-cutting aluminum alloys are widely used in the fields of electronic communications, transportation, mechanical equipment, aerospace and weaponry, and are used to manufacture various precision aluminum alloy parts. [0003] Existing free-cutting alumin...

Claims

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Application Information

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IPC IPC(8): C22C1/03C22C1/06B22D11/114C22F1/053C22C21/10B21C37/04
CPCB21C37/04B22D11/114C22C1/026C22C1/03C22C1/06C22C21/10C22F1/002C22F1/053
Inventor 牛艳萍王登峰覃建波张大鹏
Owner 广东领胜新材料科技有限公司
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