Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a method for improving in-situ enhanced TiB2Mechanical property of/Al-Cu composite materialEnergy composite strong deformation method. By adopting the method of the invention, TiB in the composite material matrix can be effectively improved2The aggregation state of the particles improves the mechanical property of the composite material, and the composite material has better plasticity while keeping high strength.
The invention is realized by the following scheme:
in-situ enhanced TiB2The composite strong deformation method of the mechanical property of the Al-Cu composite material is to prepare TiB by an in-situ self-generation method2Carrying out variable temperature strong deformation, solid solution treatment, room temperature deformation and artificial aging after homogenizing treatment on the/Al-Cu composite casting blank;
the variable-temperature strong deformation consists of high-temperature deformation and medium-low temperature deformation;
the variable-temperature strong deformation consists of high-temperature deformation and medium-low temperature deformation;
the high-temperature deformation process parameters are as follows:
temperature: 400-500 ℃, deformation: more than or equal to 60 percent; deforming for one or more times;
the medium-low temperature deformation process parameters are as follows:
temperature: the temperature is between room temperature and 300 ℃, and the deformation is more than or equal to 10 percent;
the room temperature deformation process parameters are as follows:
temperature: at room temperature, the deformation is more than or equal to 3 percent.
The invention relates to a method for improving in-situ reinforced TiB2The composite strong deformation method of the mechanical property of the Al-Cu composite material comprises a high-temperature deformation process, a medium-low temperature deformation process and a room-temperature deformation process, wherein the high-temperature deformation process, the medium-low temperature deformation process and the room-temperature deformation process are selected from one of rolling, forging and extruding.
The invention relates to a method for improving in-situ reinforced TiB2A composite strong deformation method of mechanical property of Al-Cu composite material,
the high-temperature deformation process parameters are as follows:
temperature: 400-450 ℃, deformation: 65 to 80 percent;
the medium-low temperature deformation process parameters are as follows:
temperature: the temperature is between room temperature and 300 ℃, and the deformation is 15-30%;
the room temperature deformation process parameters are as follows:
temperature: and (3) deformation of 3-50% at room temperature.
The invention relates to a method for improving in-situ reinforced TiB2The composite strong deformation method of the mechanical property of the Al-Cu composite material comprises the following high-temperature deformation process parameters:
temperature: the deformation is 70-80% at 400-450 ℃;
the medium-low temperature deformation process parameters are as follows:
temperature: deformation at 100-200 ℃: 20 to 30 percent;
the room temperature deformation process parameters are as follows:
temperature: room temperature, deformation amount: 30 to 50 percent.
The medium-low temperature deformation process parameters are as follows:
temperature: the temperature is between room temperature and 300 ℃, and the deformation is more than or equal to 20 percent;
the room temperature deformation process parameters are as follows:
temperature: at room temperature, the deformation is more than or equal to 3 percent.
The invention relates to a method for improving in-situ reinforced TiB2The composite strong deformation method of the mechanical property of the Al-Cu composite material comprises the following casting blank homogenization treatment process parameters: 500-550 ℃.
The invention relates to a method for improving in-situ reinforced TiB2The composite strong deformation method of the mechanical property of the Al-Cu composite material comprises the following solid solution treatment process parameters: the temperature is 500-540 ℃, and the heat preservation time is as follows: and water quenching for 0.5-10 h.
The invention relates to a method for improving in-situ reinforced TiB2The composite strong deformation method of the mechanical property of the Al-Cu composite material comprises the following artificial aging process parameters: the temperature is 150-200 ℃, and the heat preservation time is as follows: 1-50 h.
The invention relates to a method for improving in-situ reinforced TiB2A composite strong deformation method of the mechanical property of the Al-Cu composite material, namely the TiB2The Al-Cu composite material comprises the following components in percentage by mass:
compared with the conventional plastic forming process, the invention introduces a composite strong deformation method process to promote the formation of uniformly dispersed TiB2The grains are refined, and the high strength and good plasticity are realized. According to the invention, the uniform casting blank is subjected to variable-temperature strong deformation treatment, so that the dispersion of agglomerated particles is effectively promoted, and the recrystallization is induced to occur, so that the aggregation state of particles is effectively improved; meanwhile, the material subjected to solution quenching treatment is subjected to low-temperature strong deformation, so that the dislocation density is improved, and the TiB is further improved2The distribution state of the particles is regulated and controlled through artificial aging, and the aging precipitated phase state is finally realized while the high strength of the composite material is maintained.
The invention has simple process and convenient operation, and can obviously improve the strength and the plasticity of the alloy. Is suitable for industrial application. The method plays an important role in improving the performance of the in-situ reinforced aluminum-based composite material applied in the fields of aerospace, transportation and the like. For preparing large-specification high-comprehensive-performance in-situ enhanced TiB2The Al-Cu aluminum-based composite material, the component and the application have important significance.
The specific implementation mode is as follows:
comparative example 1 and examples 1-4 are homogenized TiB2a/Al-Cu composite material.
(5wt.TiB2Al-6.3Cu-0.3Mn-0.10Zr (mass fraction)) aluminum alloy casting blanks are formed by adopting the process flow of the invention, and the conditions of deformation temperature, solid solution, aging heat treatment and the like are shown in the comparative example and the embodiment.
TiB prepared by comparative example 1 and examples 1 to 4 was used2The strength and elongation of the/Al-Cu composite are shown in Table 1. The mechanical tensile test is referred to GB/T228.
Comparative example 1:
TiB2preheating a/Al-Cu series composite material homogenized cast ingot at 450 ℃ for 4 hours, and rolling the ingot, wherein the total deformation is 93%; solid solution is carried out for 2h at 540 ℃, water quenching is carried out at room temperature, cold deformation is carried out for 3 percent, and aging is carried out at 155 ℃/23 h.
Example 1:
TiB2preheating a homogenized ingot made of the Al-Cu composite material at 450 ℃ for 4h, rolling at 450 ℃ for 73%, annealing at 450 ℃ for 1h, and then rolling at 300 ℃ for 20%, wherein the total deformation is 93%; solid solution is carried out for 2h at 540 ℃, water quenching is carried out at room temperature, cold deformation is carried out for 3 percent, and aging is carried out at 155 ℃/23 h.
Example 2:
TiB2preheating a homogenized ingot of the Al-Cu composite material at 450 ℃ for 4h, rolling at 450 ℃ for 73%, annealing at 450 ℃ for 1h, and rolling at room temperature for 20%; solid solution is carried out for 2h at 540 ℃, water quenching is carried out at room temperature, cold deformation is carried out for 3 percent, and aging is carried out at 155 ℃/23 h.
Example 3:
preheating an Al-Cu aluminum alloy homogenized ingot at 450 ℃ for 4 hours, rolling at 450 ℃ for 73 percent, annealing at 450 ℃ for 1 hour, rolling at 300 ℃ for 20 percent, and keeping the total deformation amount at 93 percent; solid solution is carried out for 2h at 540 ℃, water quenching is carried out at room temperature, 30 percent cold deformation and aging is carried out at 155 ℃/23 h.
Example 4:
preheating an Al-Cu aluminum alloy homogenized ingot at 450 ℃ for 4 hours, rolling at 450 ℃ for 73 percent, annealing at 450 ℃ for 1 hour, rolling at 300 ℃ for 20 percent, and keeping the total deformation amount at 93 percent; solid solution is carried out for 2h at 540 ℃, water quenching is carried out at room temperature, cold deformation is carried out by 50 percent, and aging is carried out at 155 ℃/23 h.
TABLE 1 in-situ reinforced mechanical properties of TiB2/2219 composite material
Examples of the invention
|
Heat treatment method
|
σb/MPa
|
σ0.2/MPa
|
δ/%
|
Comparative example 1
|
The invention
|
474.2±2
|
400.6±1
|
4.7±0.1
|
Example 1
|
The invention
|
480.7±2
|
404.6±1
|
5.5±0.1
|
Example 2
|
The invention
|
489.6±2
|
414.3±1
|
6±0.1
|
Example 3
|
The invention
|
480.9±2
|
427.2±3
|
5.6±0.1
|
Example 4
|
The invention
|
498.7±2
|
446.7±4
|
5.7±0.1 |
The results in Table 1 show that TiB is enhanced in situ using the present invention as compared to conventional plastic deformation2The Al-Cu composite material has strong composite deformation of mechanical property, and the tensile strength and yield strength of the material are obviously improved.