Refining agent and refining method of 2124 alloy casting ingot

Abstract

The invention provides a refining agent. The refining agent is prepared from the following components: 2.5 to 3.5 weight percent of Ti, 0.8 to 1.3 weight percent of B and the balance of Al. The invention provides a refining method of a 2124 alloy casting ingot; the refining agent provided by the technical scheme is added in a process of preparing the 2124 alloy casting ingot. The refining agent with specific components is used for refining the 2124 alloy casting ingot; a 2124 alloy can be refined relatively well under the condition that the dosage of the added refining agent is relatively small; the aggregation of TiB2 particles is reduced by the refined 2124 alloy.

Description

technical field

[0001] The invention relates to the technical field of aluminum alloys, in particular to a method for refining 2124 alloy ingots. Background technique

[0002] The alloying element of 2124 aluminum alloy is copper, known as hard aluminum, which has high strength and good cutting performance, but poor corrosion resistance. Widely used in aircraft structures (skin, skeleton, rib beams, bulkheads, etc.), rivets, missile components, truck hubs, propeller components and other structural parts, it is Al-Cu-Mg system. At present, after the 2124 alloy square ingot is refined by conventional refining process, 2 Particles are prone to aggregation, which makes the subsequent process prone to flaw detection defects and seriously affects product quality.

[0003] Provides a way to avoid TiB 2 The refinement process of particle aggregation has become an urgent problem to be solved by those skilled in the art. Contents of the invention

[0004] In view of this, the ob...

Examples

Embodiment 1

[0035] Batching, smelting, refining, sampling analysis, adding refiner and casting are carried out in sequence to obtain 2124 alloy ingot.

[0036] The composition of the refiner is 3.1wt% of Ti; 1.1wt% of B; the balance is Al.

[0037] The melting temperature is 750°C.

[0038] The refining method is argon refining, and the refining temperature is 740°C.

[0039] The sampling analysis is to analyze the chemical composition of the alloy liquid.

[0040] The added amount of the refining agent is 0.005% of the mass of the refined alloy liquid in terms of Ti.

[0041] During the casting process, the casting temperature is 740°C, and the cooling water flow rate is 30m 3 / h; the casting speed is 60mm / min.

[0042] The composition of the 2124 alloy ingot prepared in Example 1 of the present invention was tested, and the test results showed that the composition of the 2124 alloy ingot prepared in Example 1 of the present invention was:

[0043] 0.02 wt% silicon; 0.05 wt% iron; 4...

Embodiment 2

[0046] Batching, smelting, refining, sampling analysis, adding refiner and casting are carried out in sequence to obtain 2124 alloy ingot.

[0047] The composition of the refiner is 3.1wt% of Ti; 1.1wt% of B; the balance is Al.

[0048] The melting temperature range is 720°C.

[0049] The refining method is argon refining, and the refining temperature is 720°C.

[0050] The sampling analysis is to analyze the chemical composition of the alloy liquid.

[0051] The added amount of the refining agent is 0.004% of the mass of the refined alloy liquid in terms of Ti.

[0052] The casting temperature in the casting process is 720°C, and the cooling water flow rate is 20m 3 / h; the casting speed is 45mm / min.

[0053] The composition of the 2124 alloy ingot prepared in Example 2 of the present invention was tested, and the test result was that the composition of the 2124 alloy ingot prepared in Example 2 of the present invention was:

[0054]0.03 wt% silicon; 0.05 wt% iron; 4.15 ...

Embodiment 3

[0057] Batching, smelting, refining, sampling analysis, adding refiner and casting are carried out in sequence to obtain 2124 alloy ingot.

[0058] The composition of the refiner is 3.1wt% of Ti; 1.1wt% of B; the balance is Al.

[0059] The melting temperature is 770°C.

[0060] The refining method is argon refining, and the refining temperature is 760°C.

[0061] The sampling analysis is to analyze the chemical composition of the alloy liquid.

[0062] The added amount of the refining agent is 0.008% of the mass of the refined alloy liquid in terms of Ti.

[0063] The casting temperature in the casting process is 760°C, and the cooling water flow rate is 40m 3 / h; the casting speed is 70mm / min.

[0064] The composition of the 2124 alloy ingot prepared in Example 3 of the present invention was tested, and the test result was that the composition of the 2124 alloy ingot prepared in Example 3 of the present invention was:

[0065] 0.02 wt% silicon; 0.04 wt% iron; 4.20 wt% c...

technical field

[0001] The invention relates to the technical field of aluminum alloys, in particular to a method for refining 2124 alloy ingots. Background technique

[0002] The alloying element of 2124 aluminum alloy is copper, known as hard aluminum, which has high strength and good cutting performance, but poor corrosion resistance. Widely used in aircraft structures (skin, skeleton, rib beams, bulkheads, etc.), rivets, missile components, truck hubs, propeller components and other structural parts, it is Al-Cu-Mg system. At present, after the 2124 alloy square ingot is refined by conventional refining process, 2 Particles are prone to aggregation, which makes the subsequent process prone to flaw detection defects and seriously affects product quality.

[0003] Provides a way to avoid TiB 2 The refinement process of particle aggregation has become an urgent problem to be solved by those skilled in the art. Contents of the invention

[0004] In view of this, the ob...

Examples

Embodiment 1

[0035] Batching, smelting, refining, sampling analysis, adding refiner and casting are carried out in sequence to obtain 2124 alloy ingot.

[0036] The composition of the refiner is 3.1wt% of Ti; 1.1wt% of B; the balance is Al.

[0037] The melting temperature is 750°C.

[0038] The refining method is argon refining, and the refining temperature is 740°C.

[0039] The sampling analysis is to analyze the chemical composition of the alloy liquid.

[0040] The added amount of the refining agent is 0.005% of the mass of the refined alloy liquid in terms of Ti.

[0041] During the casting process, the casting temperature is 740°C, and the cooling water flow rate is 30m 3 / h; the casting speed is 60mm / min.

[0042] The composition of the 2124 alloy ingot prepared in Example 1 of the present invention was tested, and the test results showed that the composition of the 2124 alloy ingot prepared in Example 1 of the present invention was:

[0043] 0.02 wt% silicon; 0.05 wt% iron; 4...

Embodiment 2

[0046] Batching, smelting, refining, sampling analysis, adding refiner and casting are carried out in sequence to obtain 2124 alloy ingot.

[0047] The composition of the refiner is 3.1wt% of Ti; 1.1wt% of B; the balance is Al.

[0048] The melting temperature range is 720°C.

[0049] The refining method is argon refining, and the refining temperature is 720°C.

[0050] The sampling analysis is to analyze the chemical composition of the alloy liquid.

[0051] The added amount of the refining agent is 0.004% of the mass of the refined alloy liquid in terms of Ti.

[0052] The casting temperature in the casting process is 720°C, and the cooling water flow rate is 20m 3 / h; the casting speed is 45mm / min.

[0053] The composition of the 2124 alloy ingot prepared in Example 2 of the present invention was tested, and the test result was that the composition of the 2124 alloy ingot prepared in Example 2 of the present invention was:

[0054]0.03 wt% silicon; 0.05 wt% iron; 4.15 ...

Embodiment 3

[0057] Batching, smelting, refining, sampling analysis, adding refiner and casting are carried out in sequence to obtain 2124 alloy ingot.

[0058] The composition of the refiner is 3.1wt% of Ti; 1.1wt% of B; the balance is Al.

[0059] The melting temperature is 770°C.

[0060] The refining method is argon refining, and the refining temperature is 760°C.

[0061] The sampling analysis is to analyze the chemical composition of the alloy liquid.

[0062] The added amount of the refining agent is 0.008% of the mass of the refined alloy liquid in terms of Ti.

[0063] The casting temperature in the casting process is 760°C, and the cooling water flow rate is 40m 3 / h; the casting speed is 70mm / min.

[0064] The composition of the 2124 alloy ingot prepared in Example 3 of the present invention was tested, and the test result was that the composition of the 2124 alloy ingot prepared in Example 3 of the present invention was:

[0065] 0.02 wt% silicon; 0.04 wt% iron; 4.20 wt% c...