A Heat Treatment Process for Improving the Strength and Plasticity of Cast Beryllium Aluminum Scandium Zirconium Alloy

Abstract

The invention relates to the technical field of non-ferrous metals, in particular to the field of metal heat treatment, in particular to a heat treatment process for improving the strength and plasticity of cast beryllium aluminum scandium zirconium alloys. This process proposes homogenization-hot rolling-cold rolling-annealing for cast beryllium-aluminum-scandium-zirconium alloys whose components are 60-65% beryllium, 34-39% aluminum, 0.3-0.5% scandium, and 0.3-0.5% zirconium. The composite heat treatment process route effectively solves the problems of segregation of solute elements and coarseness of the second phase in the cast beryllium aluminum scandium zirconium alloy, and improves the adverse effect of the second phase particles on the deformation process of the alloy. The heat treatment operation is simple and easy to implement, and the obtained alloy has excellent comprehensive mechanical properties and good application value.

Description

technical field

[0001] The invention relates to the technical field of nonferrous metals, in particular to the field of metal heat treatment, in particular to a heat treatment process for improving the strength and plasticity of cast beryllium aluminum scandium zirconium alloys. Background technique

[0002] Beryllium aluminum alloy has both the low density and high strength of metal beryllium and the high plasticity and excellent mechanical properties of metal aluminum. It has many characteristics including high specific stiffness, high thermal conductivity and dimensional stability. As a comprehensive performance High light weight alloy, beryllium aluminum alloy has important application value in aerospace, nuclear industry and other fields. Due to the difference in intrinsic physical and chemical properties between metal beryllium and aluminum, the beryllium aluminum alloy is essentially a metal matrix composite material composed of dendrite beryllium and aluminum filling...

Examples

Embodiment 1

[0025] A heat treatment process for improving the strength and plasticity of cast beryllium-aluminum-scandium-zirconium alloys. The alloy components include: 62% beryllium, 37% aluminum, 0.5% scandium, 0.5% zirconium, and the rest are unavoidable impurities. The total mass is 100%. The sum of the content is 100%.

[0026] Described heat treatment process specifically comprises the following steps:

[0027] (1) Homogenization: put the alloy casting into a heat treatment furnace in a protective atmosphere, first heat it to 540°C at a heating rate of 30°C / min and hold it for 4 hours, then heat it to 632°C at the same heating rate and Continue to keep warm for 6 hours, and then water quench to room temperature after the end.

[0028] (2) Hot rolling: The homogenized alloy is hot-rolled for multiple passes at a temperature of 550°C, each pass is always carried out in a single direction, and the reduction of each pass is 8%, and each pass is rolled at 550°C before hot rolling Heat...

Embodiment 2

[0032] A heat treatment process for improving the strength and plasticity of cast beryllium-aluminum-scandium-zirconium alloys. The alloy components include: 64% beryllium, 35.2% aluminum, 0.4% scandium, 0.4% zirconium, and the rest are unavoidable impurities. The total mass percentage is 100%. The sum of the content is 100%.

[0033] Described heat treatment process specifically comprises:

[0034] (1) Homogenization: put the alloy casting into a heat treatment furnace in a protective atmosphere, first heat it to 520°C at a heating rate of 36°C / min and hold it for 5 hours, then heat it to 628°C at the same heating rate and Continue to keep warm for 6 hours, and then water quench to room temperature after the end.

[0035] (2) Hot rolling: The homogenized state alloy is hot-rolled for multiple passes at a temperature of 500°C. Each pass is always carried out in a single direction, and the reduction of each pass is 5%. Heat preservation for 30 minutes, the total deformation o...

Embodiment 3

[0039] A heat treatment process for improving the strength and plasticity of cast beryllium-aluminum-scandium-zirconium alloys. The alloy components include: 60% beryllium, 39% aluminum, 0.5% scandium, 0.5% zirconium, and the rest are unavoidable impurities. The total mass percentage is 100%. The sum of the content is 100%.

[0040]Described heat treatment process specifically comprises:

[0041] (1) Homogenization: Put the alloy casting into a heat treatment furnace in a protective atmosphere, first heat it to 510°C at a heating rate of 40°C / min and hold it for 6 hours, then heat it to 622°C at the same heating rate and Continue to keep warm for 8 hours, and then water quench to room temperature after the end.

[0042] (2) Hot rolling: The homogenized alloy is hot-rolled for multiple passes at a temperature of 465°C, and each pass is always carried out in a single direction, with a reduction of 8% per pass, and each pass is rolled at 465°C After heat preservation for 1 hour...

technical field

[0001] The invention relates to the technical field of nonferrous metals, in particular to the field of metal heat treatment, in particular to a heat treatment process for improving the strength and plasticity of cast beryllium aluminum scandium zirconium alloys. Background technique

[0002] Beryllium aluminum alloy has both the low density and high strength of metal beryllium and the high plasticity and excellent mechanical properties of metal aluminum. It has many characteristics including high specific stiffness, high thermal conductivity and dimensional stability. As a comprehensive performance High light weight alloy, beryllium aluminum alloy has important application value in aerospace, nuclear industry and other fields. Due to the difference in intrinsic physical and chemical properties between metal beryllium and aluminum, the beryllium aluminum alloy is essentially a metal matrix composite material composed of dendrite beryllium and aluminum filling...

Examples

Embodiment 1

[0025] A heat treatment process for improving the strength and plasticity of cast beryllium-aluminum-scandium-zirconium alloys. The alloy components include: 62% beryllium, 37% aluminum, 0.5% scandium, 0.5% zirconium, and the rest are unavoidable impurities. The total mass is 100%. The sum of the content is 100%.

[0026] Described heat treatment process specifically comprises the following steps:

[0027] (1) Homogenization: put the alloy casting into a heat treatment furnace in a protective atmosphere, first heat it to 540°C at a heating rate of 30°C / min and hold it for 4 hours, then heat it to 632°C at the same heating rate and Continue to keep warm for 6 hours, and then water quench to room temperature after the end.

[0028] (2) Hot rolling: The homogenized alloy is hot-rolled for multiple passes at a temperature of 550°C, each pass is always carried out in a single direction, and the reduction of each pass is 8%, and each pass is rolled at 550°C before hot rolling Heat...

Embodiment 2

[0032] A heat treatment process for improving the strength and plasticity of cast beryllium-aluminum-scandium-zirconium alloys. The alloy components include: 64% beryllium, 35.2% aluminum, 0.4% scandium, 0.4% zirconium, and the rest are unavoidable impurities. The total mass percentage is 100%. The sum of the content is 100%.

[0033] Described heat treatment process specifically comprises:

[0034] (1) Homogenization: put the alloy casting into a heat treatment furnace in a protective atmosphere, first heat it to 520°C at a heating rate of 36°C / min and hold it for 5 hours, then heat it to 628°C at the same heating rate and Continue to keep warm for 6 hours, and then water quench to room temperature after the end.

[0035] (2) Hot rolling: The homogenized state alloy is hot-rolled for multiple passes at a temperature of 500°C. Each pass is always carried out in a single direction, and the reduction of each pass is 5%. Heat preservation for 30 minutes, the total deformation o...

Embodiment 3

[0039] A heat treatment process for improving the strength and plasticity of cast beryllium-aluminum-scandium-zirconium alloys. The alloy components include: 60% beryllium, 39% aluminum, 0.5% scandium, 0.5% zirconium, and the rest are unavoidable impurities. The total mass percentage is 100%. The sum of the content is 100%.

[0040]Described heat treatment process specifically comprises:

[0041] (1) Homogenization: Put the alloy casting into a heat treatment furnace in a protective atmosphere, first heat it to 510°C at a heating rate of 40°C / min and hold it for 6 hours, then heat it to 622°C at the same heating rate and Continue to keep warm for 8 hours, and then water quench to room temperature after the end.

[0042] (2) Hot rolling: The homogenized alloy is hot-rolled for multiple passes at a temperature of 465°C, and each pass is always carried out in a single direction, with a reduction of 8% per pass, and each pass is rolled at 465°C After heat preservation for 1 hour...

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