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A kind of free-cutting aluminum-copper alloy extruded rod and preparation method thereof

An aluminum-copper alloy, easy-cutting technology, applied in the field of aluminum-copper alloy extruded bar and its preparation, can solve the problem of high temperature brittleness, the cutting performance of aluminum-copper alloy extruded bar is difficult to meet the requirements of high-speed cutting processing of CNC machine tools, and the Poor corrosion performance, etc.

Active Publication Date: 2020-07-28
GUANGDONG XINGFA ALUMINUM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] (2) With the popularization and application of high-speed CNC machine tools such as CNC lathes, CNC milling machines, and CNC drilling machines, the cutting performance of existing easy-to-cut aluminum-copper alloy extruded bars has become increasingly difficult to meet the high-speed cutting requirements of CNC machine tools , there is an urgent need to develop aluminum-copper alloy extruded rods with better machinability
[0008] (3) Existing easy-to-cut aluminum-copper alloy extruded bars generally have problems such as low strength, high temperature brittleness, and poor corrosion resistance.
[0009] Therefore, the existing free-cutting aluminum-copper alloy extruded rods and their preparation methods still need to be improved and developed.

Method used

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  • A kind of free-cutting aluminum-copper alloy extruded rod and preparation method thereof
  • A kind of free-cutting aluminum-copper alloy extruded rod and preparation method thereof
  • A kind of free-cutting aluminum-copper alloy extruded rod and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] A free-cutting aluminum-copper alloy extruded bar, consisting of the following mass percentages: Cu 4.1%, Mg0.8%, Mn 0.9%, Cr 0.5%, Ce 0.2%, B 0.08%, Ti 0.015%, C 0.0006%, Sn 1.1%, Bi0.4%, Fe≤0.2%, Si≤0.1%, the balance is Al and other impurity elements, the individual content of other impurity elements is ≤0.05%, the total amount is ≤0.15%;

[0064] The preparation method is as figure 1 As shown, including the following steps:

[0065] S001: According to the composition and mass percentage of the aluminum-copper alloy extruded bar, select aluminum ingots with 99.7% aluminum content, magnesium ingots with 99.95% magnesium content, tin ingots with tin content 99.99%, bismuth ingots with bismuth content 99.99%, AlCu50 alloy, AlMn10 alloy, AlCr10 alloy, AlCe5 alloy, AlB3 alloy and AlTi5C0.2 alloy wire are used as raw materials for ingredients;

[0066] S002: Place the aluminum ingot in a furnace with a permanent magnetic stirring device at the bottom of the furnace to heat and me...

Embodiment 2

[0075] A free-cutting aluminum-copper alloy extruded bar, consisting of the following mass percentages: Cu 3.5%, Mg0.9%, Mn 0.6%, Cr 0.6%, Ce 0.25%, B 0.06%, Ti 0.01%, C 0.0004%, Sn 1.2%, Bi0.3%, Fe≤0.2%, Si≤0.1%, the balance is Al and other impurity elements, the individual content of other impurity elements is ≤0.05%, and the total amount is ≤0.15%;

[0076] The preparation method includes the following steps:

[0077] S001: According to the composition and mass percentage of the aluminum-copper alloy extruded bar, select aluminum ingots with 99.7% aluminum content, magnesium ingots with 99.95% magnesium content, tin ingots with tin content 99.99%, bismuth ingots with bismuth content 99.99%, AlCu50 alloy, AlMn10 alloy, AlCr10 alloy, AlCe5 alloy, AlB3 alloy and AlTi5C0.2 alloy wire are used as raw materials for ingredients;

[0078] S002: Put the aluminum ingot in a furnace with a permanent magnetic stirring device at the bottom of the furnace to heat and melt at 760°C, then add ma...

Embodiment 3

[0087] A free-cutting aluminum-copper alloy extruded bar, consisting of the following mass percentages: Cu 4.5%, Mg 0.6%, Mn 1.0%, Cr 0.4%, Ce 0.15%, B 0.1%, Ti 0.02%, C 0.0008%, Sn 0.8%, Bi0.5%, Fe≤0.2%, Si≤0.1%, the balance is Al and other impurity elements, the individual content of other impurity elements is ≤0.05%, the total amount is ≤0.15%;

[0088] The preparation method includes the following steps:

[0089] S001: According to the composition and mass percentage of the aluminum-copper alloy extruded bar, select aluminum ingots with 99.7% aluminum content, magnesium ingots with 99.95% magnesium content, tin ingots with tin content 99.99%, bismuth ingots with bismuth content 99.99%, AlCu50 alloy, AlMn10 alloy, AlCr10 alloy, AlCe5 alloy, AlB3 alloy and AlTi5C0.2 alloy wire are used as raw materials for ingredients;

[0090] S002: Place the aluminum ingot in a furnace with a permanent magnetic stirring device at the bottom of the furnace to heat and melt at 750°C, and then add ...

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Abstract

The invention provides a free-cutting aluminum copper alloy extruded bar and a preparation method thereof. The aluminum copper alloy extruded bar comprises the following components of, in percentage by mass, 3.5%-4.5% of Cu, 0.6%-0.9% of Mg, 0.6%-1.0% of Mn, 0.4%-0.6% of Cr, 0.15%-0.25% of Ce, 0.06%-0.1% of B, 0.01%-0.02% of Ti, 0.0004%-0.0008% of C, 0.8%-1.2% of Sn, 0.3%-0.5% of Bi, less than orequal to 0.2% of Fe, less than or equal to 0.1% of Si, and the balance Al and other impurity elements. The preparation method of the bar sequentially comprises the steps of burdening, smelting an aluminum copper molten alloy, in-furnace blowing and refining treatment and degassing and impurity removing, on-line grain refining, on-line degassing filtering treatment, semi-continuous casting treatment, cast bar homogenizing, heating extruding treatment, on-line quenching and artificial aging treatment. The aluminum copper alloy extruded bar does not contain heavy metal element lead, meets the environment-friendly requirement, and has good mechanical properties and excellent cutting machining performance; cutting chips are easy to break, not prone to adhere to or twine around a cutter, the production efficiency of cutting machining is improved, and the surface smoothness and the size precision of products are improved.

Description

Technical field [0001] The invention belongs to the technical field of aluminum alloy preparation, and specifically relates to an easy-cut aluminum-copper alloy extruded bar and a preparation method thereof. Background technique [0002] Free-cutting aluminum alloy usually refers to the aluminum alloy that is easy to cut chips, does not stick to the knife, does not wrap the knife, and is convenient for chip removal. The free-cutting aluminum alloy can be cut at a higher speed or a larger feed rate, which can significantly improve the production efficiency of the cutting process, and obtain precision aluminum alloy parts with good surface finish and high dimensional accuracy. [0003] Existing free-cutting aluminum alloys mainly improve the cutting performance of aluminum alloys by adding low-melting metal elements. During the high-speed cutting of aluminum alloys, the temperature of aluminum alloy chips increases due to frictional heat. When the aluminum alloy chip temperature is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/16C22C21/14C22C1/03C22C1/06C22F1/057B21C23/00
CPCB21C23/002C22C1/026C22C1/03C22C1/06C22C21/14C22C21/16C22F1/057
Inventor 陈文泗罗铭强王顺成聂德键易鹏林丽荧金娜郑健全
Owner GUANGDONG XINGFA ALUMINUM
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