Titanium and aluminum based alloy powder material for additive manufacturing and preparation method thereof

Abstract

The invention provides a titanium and aluminum based alloy powder material for additive manufacturing. The titanium and aluminum based alloy powder material is prepared from the following raw materials in percentage by atom: 47 to 56 percent of Al, 1.6 to 2.3 percent of Cr, 1.6 to 2.0 percent of Mo, 0.6 to 1.2 percent of TiB2 and the balance of Ti and unavoidable impurity. In addition, the invention also provides a method for preparing the alloy powder material. The method comprises the following steps of I, protecting the inner wall of a graphite flow guiding pipe by adopting a ceramic flow guiding inner core; II, preparing high-temperature-preventing carbonized coatings at the end surfaces of the graphite flow guiding pipe and then loading the graphite flow guiding pipe into a smelting chamber; III, preparing an ingot blank by adopting vacuum self-consuming arc smelting; IV, smelting to prepare an alloy melt by adopting a water-cooled copper crucible; V, carrying out atomization treatment, so that the titanium and aluminum based alloy powder material for the additive manufacturing is obtained. The alloy powder material is an alloy system designed for the additive manufacturing process and various properties of a product manufactured through the additive manufacturing technique by adopting the alloy powder material can reach expected effects.

Description

technical field

[0001] The invention belongs to the technical field of additive manufacturing and powder metallurgy, and in particular relates to a titanium-aluminum-based alloy powder material for additive manufacturing and a preparation method thereof. Background technique

[0002] The development of the aerospace and automobile industries has put forward more stringent requirements on the performance of key parts such as engine blades and turbochargers. Intermetallic compound materials represented by TiAl-based alloys have both metallic bonds and covalent bonds. It has the toughness of metal materials and the high-temperature performance of ceramics. It has low density, excellent oxidation resistance, and good high-temperature specific strength. It has become the most promising new generation of high-temperature structural materials. However, due to the long-range ordered structure and crystal structure of TiAl intermetallic compounds, their room temperature plasticity an...

Examples

Embodiment 1

[0031] The titanium-aluminum-based alloy powder material for additive manufacturing in this embodiment is made of the following atomic percent raw materials: Al47%, Cr 2.3%, Mo 2.0%, TiB 2 1.0%, the balance is Ti and unavoidable impurities.

[0032] The method for preparing titanium-aluminum-based alloy powder material in this embodiment comprises the following steps:

[0033] Step 1. Protect the inner wall of the graphite flow guide tube in the vacuum induction melting gas atomization equipment by using the ceramic flow guide inner core. The ceramic powder is added into the mold and pressed into shape, and after sintering, a ceramic flow guide core compatible with the graphite flow guide tube is obtained, and then the ceramic flow guide core is nested inside the graphite flow guide tube; The first ceramic powder is ZrO 2 powder;

[0034] Step 2. Mix the second ceramic powder and absolute ethanol evenly to obtain an anti-high temperature carbonization coating, and apply th...

Embodiment 2

[0040] The titanium-aluminum-based alloy powder material for additive manufacturing in this embodiment is made of the following atomic percentages of raw materials: Al56%, Cr 1.6%, Mo 1.6%, TiB 2 1.2%, the balance is Ti and unavoidable impurities.

[0041] The method for preparing titanium-aluminum-based alloy powder material in this embodiment comprises the following steps:

[0042] Step 1. Protect the inner wall of the graphite flow guide tube in the vacuum induction melting gas atomization equipment by using the ceramic flow guide inner core. The ceramic powder is added into the mold and pressed into shape, and after sintering, a ceramic flow guide core compatible with the graphite flow guide tube is obtained, and then the ceramic flow guide core is nested inside the graphite flow guide tube; The first ceramic powder is Y 2 o 3 powder;

[0043] Step 2. Mix the second ceramic powder and absolute ethanol evenly to obtain an anti-high temperature carbonization coating, an...

Embodiment 3

[0049]The titanium-aluminum-based alloy powder material for additive manufacturing in this embodiment is made of the following atomic percentages: Al50%, Cr 2.0%, Mo 2.0%, TiB 2 0.8%, the balance is Ti and unavoidable impurities.

[0050] The method for preparing titanium-aluminum-based alloy powder material in this embodiment comprises the following steps:

[0051] Step 1. Protect the inner wall of the graphite flow guide tube in the vacuum induction melting gas atomization equipment by using the ceramic flow guide inner core. The ceramic powder is added into the mold and pressed into shape, and after sintering, a ceramic flow guide core compatible with the graphite flow guide tube is obtained, and then the ceramic flow guide core is nested inside the graphite flow guide tube; The first ceramic powder is Y 2 o 3 powder;

[0052] Step 2. Mix the second ceramic powder and absolute ethanol evenly to obtain an anti-high temperature carbonization coating, and apply the anti-h...

technical field

[0001] The invention belongs to the technical field of additive manufacturing and powder metallurgy, and in particular relates to a titanium-aluminum-based alloy powder material for additive manufacturing and a preparation method thereof. Background technique

[0002] The development of the aerospace and automobile industries has put forward more stringent requirements on the performance of key parts such as engine blades and turbochargers. Intermetallic compound materials represented by TiAl-based alloys have both metallic bonds and covalent bonds. It has the toughness of metal materials and the high-temperature performance of ceramics. It has low density, excellent oxidation resistance, and good high-temperature specific strength. It has become the most promising new generation of high-temperature structural materials. However, due to the long-range ordered structure and crystal structure of TiAl intermetallic compounds, their room temperature plasticity an...

Examples

Embodiment 1

[0031] The titanium-aluminum-based alloy powder material for additive manufacturing in this embodiment is made of the following atomic percent raw materials: Al47%, Cr 2.3%, Mo 2.0%, TiB 2 1.0%, the balance is Ti and unavoidable impurities.

[0032] The method for preparing titanium-aluminum-based alloy powder material in this embodiment comprises the following steps:

[0033] Step 1. Protect the inner wall of the graphite flow guide tube in the vacuum induction melting gas atomization equipment by using the ceramic flow guide inner core. The ceramic powder is added into the mold and pressed into shape, and after sintering, a ceramic flow guide core compatible with the graphite flow guide tube is obtained, and then the ceramic flow guide core is nested inside the graphite flow guide tube; The first ceramic powder is ZrO 2 powder;

[0034] Step 2. Mix the second ceramic powder and absolute ethanol evenly to obtain an anti-high temperature carbonization coating, and apply th...

Embodiment 2

[0040] The titanium-aluminum-based alloy powder material for additive manufacturing in this embodiment is made of the following atomic percentages of raw materials: Al56%, Cr 1.6%, Mo 1.6%, TiB 2 1.2%, the balance is Ti and unavoidable impurities.

[0041] The method for preparing titanium-aluminum-based alloy powder material in this embodiment comprises the following steps:

[0042] Step 1. Protect the inner wall of the graphite flow guide tube in the vacuum induction melting gas atomization equipment by using the ceramic flow guide inner core. The ceramic powder is added into the mold and pressed into shape, and after sintering, a ceramic flow guide core compatible with the graphite flow guide tube is obtained, and then the ceramic flow guide core is nested inside the graphite flow guide tube; The first ceramic powder is Y 2 o 3 powder;

[0043] Step 2. Mix the second ceramic powder and absolute ethanol evenly to obtain an anti-high temperature carbonization coating, an...

Embodiment 3

[0049]The titanium-aluminum-based alloy powder material for additive manufacturing in this embodiment is made of the following atomic percentages: Al50%, Cr 2.0%, Mo 2.0%, TiB 2 0.8%, the balance is Ti and unavoidable impurities.

[0050] The method for preparing titanium-aluminum-based alloy powder material in this embodiment comprises the following steps:

[0051] Step 1. Protect the inner wall of the graphite flow guide tube in the vacuum induction melting gas atomization equipment by using the ceramic flow guide inner core. The ceramic powder is added into the mold and pressed into shape, and after sintering, a ceramic flow guide core compatible with the graphite flow guide tube is obtained, and then the ceramic flow guide core is nested inside the graphite flow guide tube; The first ceramic powder is Y 2 o 3 powder;

[0052] Step 2. Mix the second ceramic powder and absolute ethanol evenly to obtain an anti-high temperature carbonization coating, and apply the anti-h...

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