CN114310159B - Method for regulating and controlling rolling texture of in-situ autogenous particle reinforced aluminum matrix composite material - Google Patents
Method for regulating and controlling rolling texture of in-situ autogenous particle reinforced aluminum matrix composite material Download PDFInfo
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Abstract
The invention relates to a method for regulating and controlling the rolling texture of an in-situ autogenous particle reinforced aluminum matrix composite material. The aluminum-based composite material containing different particle volume fractions is prepared by adopting an in-situ melt autogenous process, the dispersion distribution of particles is realized by cold rolling and friction stir processing, the in-situ autogenous particle aluminum-based composite material containing different particle distances is obtained, and the cross sliding and dynamic recovery of dislocation in the cold rolling process can be regulated by regulating and controlling the different particle distances in the composite material, so that the aim of regulating and controlling the rolling texture of the in-situ autogenous particle reinforced aluminum-based composite material is fulfilled.
Description
Technical Field
The invention belongs to the technical field of materials, and particularly relates to a method for regulating and controlling the rolling texture of an in-situ autogenous particle reinforced aluminum matrix composite material.
Background
Aluminum alloy is widely used in industry as a metal structural material due to the advantages of low density, good plasticity, easy processing, good corrosion resistance and the like. However, texture is inevitably formed during the preparation and processing of aluminum alloys. The texture of polycrystalline materials is that the materials exhibit macroscopic anisotropy and have great influence on the elastic modulus, strength, plasticity, poisson's ratio, conductivity, thermal expansion coefficient and the like of the materials. The texture of the aluminum alloy is reasonably utilized, and the optimization of the material performance can be realized. For example, the {111} plane texture of the aluminum alloy can obviously reduce the stamping lug effect and improve the deep stamping capacity of the aluminum alloy; the capacitance can be effectively improved by improving the content of the cubic texture in the high-voltage electric Rong Yangji aluminum foil.
The aluminum alloy material can form corresponding textures in the processes of casting, deformation, recrystallization and the like. The surface of the as-cast aluminum alloy is mainly in a rotary cubic texture {001} <110>, and obvious rolling textures including a Gaussian texture Goss {011} <100>, a Brass texture Brass {011} <211>, a Copper texture Copper {112} <111> and an S texture {123} <634> are formed in the aluminum alloy after rolling deformation. In the rolling process of the aluminum alloy, uneven distribution of textures can be caused due to uneven deformation and uneven distribution of shearing deformation, so that the macroscopical performance of the material is unstable. Therefore, there is an urgent need for a method of controlling the rolling deformation texture of an aluminum-based material, thereby optimizing its physical properties.
Disclosure of Invention
The invention aims to provide a method for regulating and controlling the rolling texture of an in-situ autogenous particle reinforced aluminum matrix composite material, which is used for reasonably utilizing the texture of the aluminum matrix material, preparing the in-situ autogenous particle reinforced aluminum matrix composite material with different particle volume fractions by an in-situ melt autogenous control method, uniformly distributing particles in the composite material by cold rolling and friction stir processing, and regulating and controlling the rolling texture of the aluminum matrix composite material by utilizing the influence of different inter-particle distances on the cross sliding and dynamic recovery of dislocation in the rolling process.
The invention is realized by the following technical scheme:
the invention provides a method for regulating and controlling the rolling texture of an in-situ autogenous particle reinforced aluminum matrix composite material, which comprises the following steps:
(1) Preparing an in-situ autogenous particle reinforced aluminum matrix composite material containing different particle volume fractions by adopting an in-situ melt autogenous control method;
(2) Carrying out cold rolling treatment on the prepared in-situ autogenous particle reinforced aluminum matrix composite material containing different particle volume fractions;
(3) Carrying out friction stir processing on the cold-rolled in-situ autogenous particle reinforced aluminum matrix composite material;
(4) Homogenizing heat treatment is carried out on the in-situ authigenic particle aluminum-based composite material after friction stir processing;
(5) And performing cold rolling of different passes on the in-situ authigenic particle aluminum-based composite material after the homogenization heat treatment, thus finishing the process.
The particle reinforced aluminum matrix composite material in the step 1 contains 1 to 10 weight percent of TiB 2 The reinforced aluminum-based composite material adopts an in-situ melt autogenous control method, and the prepared in-situ autogenous particle reinforced aluminum-based composite material contains different particle volume fractions of between 1 and 10 percent.
And (3) controlling the cold rolling deformation in the step (2) to be 40-80%.
In the step (3), the stirring head is processed by stirring friction, the stirring head starts to advance from one end of the composite material to the other end at a running speed of 20-400 mm/min, and the stirring head returns to the starting point along the same path at the same speed after reaching the end point; the rotating speed of the stirring head in the stirring friction processing is 300-900 rmp.
In the step (4), the temperature is controlled at 400-550 ℃ during the homogenization heat treatment, and the heat treatment time is 24-48 h.
The number of times of cold rolling in the step (5) is more than or equal to 8, the rolling deformation amount is less than or equal to 10% each time, and the total deformation amount of the material is more than or equal to 80%.
The invention has the beneficial effects that:
compared with the prior art, the invention adopts two cold rolling processes and a friction stir process to realize the dispersion distribution of the nano particle reinforced phase in the aluminum matrix composite. Conventional secondary processing methods have difficulty in dispersing the particles uniformly, especially for nano-sized reinforcing phase particles. The friction stir-based treatment method enables the material to generate strong plastic deformation, and meanwhile, generates intense flow, and reinforcing phase particles are uniformly distributed along with the material. The cold rolling process is also beneficial to promoting the uniform dispersion of particles in the composite material, and smaller aluminum matrix deformed grains are prepared; the strength and the plasticity are improved at the same time. The method has simple and easy process operation, low cost and high efficiency, and can realize large-scale production.
Detailed Description
The present invention will be described in detail with reference to specific examples.
Example 1
A method for regulating and controlling the rolling texture of in-situ autogenous particle reinforced aluminum matrix composite material prepares as-cast TiB by an in-situ autogenous melt control method 2 The particle reinforced Al-6Zn-2Mg-1.8Cu alloy composite material is subjected to cold rolling treatment to obtain the in-situ authigenic particle reinforced aluminum-based composite material containing different particle volume fractions, so as to realize in-situ authigenic TiB 2 TiB in particle reinforced Al-6Zn-2Mg-1.8Cu alloy composite material 2 Uniformly dispersing particles; in-situ autogenous TiB after cold rolling 2 The particle reinforced Al-6Zn-2Mg-1.8Cu alloy composite material is subjected to stirring friction processing to obtain uniformly dispersed micro-nano TiB2 particles and fine equiaxial matrix grain structures, and then the uniform heat treatment and multi-pass cold rolling treatment of the Al-6Zn-2Mg-1.8Cu alloy are combined to prepare the TiB with high strength and high plasticity 2 Particle reinforced Al-6Zn-2Mg-1.8Cu alloy composite material.
The method specifically comprises the following steps:
(1) Heating industrial pure aluminum, covering with JZF-03 type high-temperature covering agent, and heating to 650deg.C;
(2) KBF is carried out 4 、K 2 TiF 6 The mass ratio is 1:0.5, uniformly mixing, drying, adding into the melt obtained in the step (1), and mechanically stirring;
(3) After the reaction is finished, taking out reaction byproducts, sequentially adding Al-50Cu intermediate alloy, industrial pure Mg and industrial pure Zn, adding JZJ harmless aluminum alloy refining agent into the melt for degassing refining, controlling the temperature to 650 ℃, standing for 20min, and then casting into a casting mould at 650 ℃ to form a casting blank;
(4) Casting to obtainIn situ autogenous TiB of (C) 2 Carrying out cold rolling treatment on alloy elements of the particle reinforced Al-6Zn-2Mg-1.8Cu alloy composite material, wherein the deformation is 50%;
(5) In-situ autogenous TiB after cold rolling 2 The particle reinforced Al-6Zn-2Mg-1.8Cu alloy composite material is subjected to friction stir processing, a stirring head is inserted at a rotating speed of 600rmp, the stirring head starts to advance along the longitudinal direction of a plate to be processed at a running speed of 80mm/min, the stirring head is enabled to keep moving speed unchanged and move reversely after reaching an end point, the stirring head is translated to the right side for 5mm after returning to the start point, and the stirring head repeatedly advances along the longitudinal direction until the whole plate is processed.
(6) In-situ autogenous TiB after friction stir processing 2 Carrying out homogenization heat treatment on the particle reinforced Al-6Zn-2Mg-1.8Cu alloy composite material, and controlling the temperature to be 500 ℃ and the time to be 24 hours;
(7) Finally, the in-situ autogenous TiB after homogenization heat treatment is carried out 2 The particle reinforced Al-6Zn-2Mg-1.8Cu alloy composite material is subjected to 8 times of multi-pass cold rolling deformation, the rolling deformation amount is 10% each time, and the total deformation amount of the material is 80%.
Example 2
A method for regulating and controlling the rolling texture of in-situ autogenous particle reinforced aluminum matrix composite material prepares as-cast TiB by an in-situ autogenous melt control method 2 The particle reinforced Al-6Mg-0.2Sc-0.1Zr alloy composite material is subjected to cold rolling treatment to obtain the in-situ autogenous particle reinforced aluminum matrix composite material containing different particle volume fractions, so as to realize in-situ autogenous TiB 2 TiB in particle reinforced Al-6Mg-0.2Sc-0.1Zr alloy composite material 2 Uniformly dispersing particles; in-situ autogenous TiB after cold rolling 2 The particle reinforced Al-6Mg-0.2Sc-0.1Zr alloy composite material is subjected to friction stir processing to obtain uniformly dispersed micro-nano TiB2 particles and fine equiaxial matrix grain structures, and then the uniform heat treatment and the multipass cold rolling treatment of the Al-6Mg-0.2Sc-0.1Zr alloy are combined to prepare the TiB with high strength and high plasticity 2 Particle reinforced Al-6Mg-0.2Sc-0.1Zr alloy composite material.
The method specifically comprises the following steps:
(1) Heating industrial pure aluminum, covering with JZF-03 type high-temperature covering agent, and heating to 650deg.C;
(2) KBF is carried out 4 、K 2 TiF 6 The mass ratio is 1:0.5, uniformly mixing, drying, adding into the melt obtained in the step (1), and mechanically stirring;
(3) After the reaction is finished, taking out reaction byproducts, sequentially adding Al-Sc, al-Zr intermediate alloy and industrial pure Mg, adding a JZJ harmless aluminum alloy refining agent into the melt for degassing refining, controlling the temperature to be 650 ℃, standing for 20min, and then casting into a casting mould at the temperature of 650 ℃ to form a casting blank;
(4) Casting the in-situ autogenous TiB 2 Carrying out cold rolling treatment on alloy elements of the particle reinforced Al-6Mg-0.2Sc-0.1Zr alloy composite material, wherein the deformation is 40%;
(5) In-situ autogenous TiB after cold rolling 2 The particle reinforced Al-6Mg-0.2Sc-0.1Zr alloy composite material is subjected to friction stir processing, a stirring head is inserted at a rotating speed of 300rmp, and advances along the longitudinal direction of the plate to be processed from the left side of the plate at a running speed of 240mm/min, after the end point is reached, the stirring head is enabled to keep moving speed unchanged and move reversely, after the stirring head returns to the starting point, the stirring head is translated to the right side for 5mm, and then advances back and forth along the longitudinal direction, and the process is repeated until the whole plate is processed.
(6) In-situ autogenous TiB after friction stir processing 2 Carrying out homogenization heat treatment on the particle reinforced Al-6Mg-0.2Sc-0.1Zr alloy composite material, and controlling the temperature to 450 ℃ and the time to 48 hours;
(7) Finally, the in-situ autogenous TiB after homogenization heat treatment is carried out 2 The particle reinforced Al-6Mg-0.2Sc-0.1Zr alloy composite material is subjected to cold rolling deformation for 10 times in multiple passes, the rolling deformation amount is 10% each time, and the total deformation amount of the material is 100%.
Claims (3)
1. The method for regulating and controlling the rolling texture of the in-situ autogenous particle reinforced aluminum matrix composite material is characterized by comprising the following steps of:
(1) Preparing an in-situ autogenous particle reinforced aluminum matrix composite material containing 1-10% of the particle volume fraction by adopting an in-situ melt autogenous control method;
(2) Carrying out cold rolling treatment on the prepared in-situ autogenous particle reinforced aluminum matrix composite material containing different particle volume fractions, wherein the cold rolling deformation is controlled between 40 and 80 percent;
(3) Carrying out friction stir processing on the cold-rolled in-situ autogenous particle reinforced aluminum matrix composite material;
(4) Homogenizing heat treatment is carried out on the in-situ authigene particle aluminum-based composite material after friction stir processing, the temperature is controlled at 400-550 ℃, and the heat treatment time is 24-48 h;
(5) And carrying out cold rolling on the in-situ authigenic particle aluminum-based composite material subjected to homogenization heat treatment in different passes, wherein the number of cold rolling is more than or equal to 8, the rolling deformation of each cold rolling is less than or equal to 10%, and the total deformation of the material is more than or equal to 80%.
2. The method for controlling the rolling texture of the in-situ autogenous particle reinforced aluminum matrix composite material according to claim 1, wherein the stirring head for stirring and friction processing in the step (3) starts to advance from one end of the composite material to the other end at a running speed of 20-400 mm/min, and the stirring head returns to the starting point along the same path at the same speed after reaching the end point.
3. The method for controlling the rolling texture of the in-situ autogenous particle reinforced aluminum matrix composite material according to claim 1, wherein the rotating speed of a stirring head for stirring friction processing in the step (3) is 300-900 rmp.
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