Nb-W-RE high-strength heat-resistant aluminum alloy material taking C for modification and preparation method thereof

Abstract

The invention discloses an Nb-W-RE high-strength heat-resistant aluminum alloy material taking C for modification. The alloy comprises the following components in percentage by weight: 1.0-10.0 Cu, 0.05-1.5 Mn, 0.01-0.5 Cd, 0.01-0.5 Ti, 0.0001-0.15 C, 0.01-1.0 Zr, 0.01-1.0 Nb, 0.01-1.0 W, 0.05-5 rare-earth element RE and the balance of Al. The method takes high-quality melt, a solid solution and a phase diagram theory as guidance, takes the C element as a high-effect modification agent, preferably selects a prescription of main elements Cu, Mn and RE, reduces the quasi solid-phase temperaturerange of the alloy, and solves the problems of large tendency of hot cracking, low intensity of high temperature of products and the like during casting. By preferably selecting a prescription of low-cost multiple micro alloying elements, the method finally develops the high-strength heat-resistant aluminum alloy material.

Description

Technical field

[0001] The invention relates to an aluminum alloy material and a preparation method thereof, in particular to a Nb-W-RE high-strength heat-resistant aluminum alloy material modified by C and a preparation method thereof. Background technique

[0002] Aluminum alloy is a relatively young metal material, which only started industrial application in the early 20th century. During the Second World War, aluminum was mainly used to manufacture military aircraft. After the war, due to the sudden drop in the military industry’s demand for aluminum, the aluminum industry began to develop civilian aluminum alloys, and its application range was expanded from the aviation industry to the construction industry, container and packaging industry, transportation, power and electronics industry, Various sectors of the national economy, such as machinery manufacturing and petrochemical industries, are applied to people's daily lives. At present, aluminum is used in a large amount...

Examples

Embodiment 1

[0115] Example 1: Cu-1.0%, characteristic microalloying elements -Nb, W, basic microalloying rare earth element-lanthanum La, high-efficiency metamorphic element -C

[0116] (1) Weigh the required alloy elements according to the ingredient calculation table, as follows.

[0117]

[0118] (2) Add an appropriate amount of aluminum ingot to the melting furnace, heat it to melt completely and keep it at 700~800℃; in order to prevent the melt from inhaling too much air, the melting process should be as short as possible and in a closed environment carry out.

[0119] (3) Add Al-Mn, Al-Ti, Al-Nb, Al-W, Al-Zr master alloy or mixed metal additives (including salt compounds) according to the formula ratio, and then add Cu pure metal and Al-Cd master alloy or mixed metal additives, then add C and rare earth element La, and stir evenly.

[0120] Mixed metal additives refer to cake or block non-sintered powder metallurgy products used for adding and adjusting alloy components, including manganes...

Embodiment 2

[0126] Example 2: Cu-4.2%, characteristic microalloying elements -Nb, W, basic microalloying rare earth elements La, Ce mixed rare earths, high-efficiency metamorphic element -C

[0127] (1) Weigh the required alloy elements according to the ingredient calculation table, as follows.

[0128]

[0129]

[0130] (2) Add an appropriate amount of aluminum ingot to the melting furnace, heat it to melt completely and keep it at 700~800℃; in order to prevent the melt from inhaling too much air, the melting process should be as short as possible and in a closed environment carry out.

[0131] (3) Add Al-Mn, Al-Ti, Al-Nb, Al-W, Al-Zr master alloy or mixed metal additives (including salt compounds) according to the formula ratio, and then add Cu pure metal and Al-Cd master alloy or mixed metal additives, then add C and rare earth elements La and Ce mixed rare earths, and stir evenly.

[0132] Mixed metal additives refer to cake or block non-sintered powder metallurgy products used for adding an...

Embodiment 3

[0138] Example 3: Cu-5.1%, characteristic microalloying elements -Nb, W, basic microalloying rare earth element Eu, high-efficiency modification element -C

[0139] (1) Weigh various alloy elements required according to the following ingredients calculation table, as follows.

[0140]

[0141] (2) Add an appropriate amount of aluminum ingot to the melting furnace, heat it to melt completely and keep it at 700~800℃; in order to prevent the melt from inhaling too much air, the melting process should be as short as possible and in a closed environment carry out.

[0142] (3) Add Al-Mn, Al-Ti, Al-Nb, Al-W, Al-Zr master alloy or mixed metal additives (including salt compounds) according to the formula ratio, and then add Cu pure metal and Al-Cd master alloy or mixed metal additives, then add C and rare earth element Eu, and stir evenly.

[0143] Mixed metal additives refer to cake or block non-sintered powder metallurgy products used for adding and adjusting alloy components, including ma...

Technical field

[0001] The invention relates to an aluminum alloy material and a preparation method thereof, in particular to a Nb-W-RE high-strength heat-resistant aluminum alloy material modified by C and a preparation method thereof. Background technique

[0002] Aluminum alloy is a relatively young metal material, which only started industrial application in the early 20th century. During the Second World War, aluminum was mainly used to manufacture military aircraft. After the war, due to the sudden drop in the military industry’s demand for aluminum, the aluminum industry began to develop civilian aluminum alloys, and its application range was expanded from the aviation industry to the construction industry, container and packaging industry, transportation, power and electronics industry, Various sectors of the national economy, such as machinery manufacturing and petrochemical industries, are applied to people's daily lives. At present, aluminum is used in a large amount...

Examples

Embodiment 1

[0115] Example 1: Cu-1.0%, characteristic microalloying elements -Nb, W, basic microalloying rare earth element-lanthanum La, high-efficiency metamorphic element -C

[0116] (1) Weigh the required alloy elements according to the ingredient calculation table, as follows.

[0117]

[0118] (2) Add an appropriate amount of aluminum ingot to the melting furnace, heat it to melt completely and keep it at 700~800℃; in order to prevent the melt from inhaling too much air, the melting process should be as short as possible and in a closed environment carry out.

[0119] (3) Add Al-Mn, Al-Ti, Al-Nb, Al-W, Al-Zr master alloy or mixed metal additives (including salt compounds) according to the formula ratio, and then add Cu pure metal and Al-Cd master alloy or mixed metal additives, then add C and rare earth element La, and stir evenly.

[0120] Mixed metal additives refer to cake or block non-sintered powder metallurgy products used for adding and adjusting alloy components, including manganes...

Embodiment 2

[0126] Example 2: Cu-4.2%, characteristic microalloying elements -Nb, W, basic microalloying rare earth elements La, Ce mixed rare earths, high-efficiency metamorphic element -C

[0127] (1) Weigh the required alloy elements according to the ingredient calculation table, as follows.

[0128]

[0129]

[0130] (2) Add an appropriate amount of aluminum ingot to the melting furnace, heat it to melt completely and keep it at 700~800℃; in order to prevent the melt from inhaling too much air, the melting process should be as short as possible and in a closed environment carry out.

[0131] (3) Add Al-Mn, Al-Ti, Al-Nb, Al-W, Al-Zr master alloy or mixed metal additives (including salt compounds) according to the formula ratio, and then add Cu pure metal and Al-Cd master alloy or mixed metal additives, then add C and rare earth elements La and Ce mixed rare earths, and stir evenly.

[0132] Mixed metal additives refer to cake or block non-sintered powder metallurgy products used for adding an...

Embodiment 3

[0138] Example 3: Cu-5.1%, characteristic microalloying elements -Nb, W, basic microalloying rare earth element Eu, high-efficiency modification element -C

[0139] (1) Weigh various alloy elements required according to the following ingredients calculation table, as follows.

[0140]

[0141] (2) Add an appropriate amount of aluminum ingot to the melting furnace, heat it to melt completely and keep it at 700~800℃; in order to prevent the melt from inhaling too much air, the melting process should be as short as possible and in a closed environment carry out.

[0142] (3) Add Al-Mn, Al-Ti, Al-Nb, Al-W, Al-Zr master alloy or mixed metal additives (including salt compounds) according to the formula ratio, and then add Cu pure metal and Al-Cd master alloy or mixed metal additives, then add C and rare earth element Eu, and stir evenly.

[0143] Mixed metal additives refer to cake or block non-sintered powder metallurgy products used for adding and adjusting alloy components, including ma...

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