阅读说明：本技术 一种泡沫铝钛合金材料的制备方法 (Preparation method of foamed aluminum-titanium alloy material ) 是由 张建乡 孟杰 张晓� 于 2021-01-29 设计创作，主要内容包括：本发明提供了一种泡沫铝钛合金材料的制备方法。制备步骤如下：步骤1：取精镁锭和铝锭,置于反应器容器中,采用锡箔纸包覆的方式加入2-3wt%的Ca粒,在转速500 rpm下搅拌5min；步骤2：升温至保温发泡温度,加入含量为2-3wt%的发泡剂,以800r/min的转速搅拌30s,保温2min；步骤3：通入氩气,在氩气的保护环境下,向反应器容器内加入气体四氯化钛反应5-10min；步骤4：去除液体氯化镁,即得泡沫铝钛合金材料。本发明制备的泡沫铝钛合金孔径分布均匀,孔隙率达到80%左右,屈服强度最高可达28.8MPa,力学性能佳。(The invention provides a preparation method of a foamed aluminum-titanium alloy material. The preparation steps are as follows: step 1: placing refined magnesium ingot and aluminum ingot in a reactor container, adding 2-3wt% of Ca particles in a mode of tin foil paper coating, and stirring for 5min at a rotation speed of 500 rpm; step 2: heating to a heat preservation foaming temperature, adding a foaming agent with the content of 2-3wt%, stirring at the rotating speed of 800r/min for 30s, and preserving heat for 2 min; and step 3: introducing argon, and adding titanium tetrachloride gas into the reactor container to react for 5-10min under the protection of argon; and 4, step 4: removing the liquid magnesium chloride to obtain the foamed aluminum-titanium alloy material. The foamed aluminum-titanium alloy prepared by the method has uniform pore size distribution, the porosity of about 80 percent, the highest yield strength of 28.8MPa and good mechanical property.)

1. The preparation method of the foamed aluminum-titanium alloy material is characterized by comprising the following steps of:

step 1: placing refined magnesium ingot and aluminum ingot in a reactor container, adding 2-3wt% of Ca particles in a mode of tin foil paper coating, and stirring for 5min at a rotation speed of 500 rpm;

step 2: heating to a heat preservation foaming temperature, adding a foaming agent with the content of 2-3wt%, stirring at the rotating speed of 800r/min for 30s, and preserving heat for 2 min;

and step 3: introducing argon, and adding titanium tetrachloride gas into the reactor container to react for 5-10min under the protection of argon;

and 4, step 4: removing the liquid magnesium chloride to obtain the foamed aluminum-titanium alloy material.

2. The method for preparing the foamed aluminum-titanium alloy material according to claim 1, wherein the mass ratio of the magnesium ingot to the aluminum ingot in the step 1 is 1: 3-4.

3. The method for preparing the foamed aluminum-titanium alloy material according to claim 1, wherein the method for preparing the foaming agent in the step 2 comprises the following steps:

1) preparing 2wt% of chitosan acetic acid solution and 1wt% of sodium alginate aqueous solution;

2) adding calcium carbonate into sodium alginate aqueous solution according to a certain proportion, and stirring to uniformly mix the calcium carbonate and the sodium alginate aqueous solution;

3) dropping the sodium alginate and calcium carbonate mixed solution into a calcium chloride/glutaraldehyde composite crosslinking agent with the concentration of 2wt% at a constant speed to obtain microspheres;

4) soaking the microspheres in a polyose acetic acid solution for 30min, and then placing the microspheres at 35 ℃ for vacuum drying to obtain the foaming agent.

4. The method as claimed in claim 1, wherein the temperature of the step 2 is 720-750 ℃.

5. The method for preparing foamed aluminum-titanium alloy material according to claim 1, wherein the amount of gaseous titanium tetrachloride in step 3 is just finished by reacting with refined magnesium ingot.

Technical Field

The invention relates to the field of alloy materials, in particular to a preparation method of a foamed aluminum-titanium alloy material.

Background

Compared with the fully compact metal composite material, the metal composite foam material has the performance advantages of low density, high specific stiffness, high energy absorption capacity, excellent mechanical and acoustic damping performance and the like. The foamed aluminum is one of the porous metal materials, the foamed aluminum is a porous metal material compounded by base metal and gas, compared with a pure metal material, the foamed aluminum has the advantages that the structural functions and some special performances, such as sound absorption, energy absorption, buffering and shock absorption, which are not possessed by the pure metal material are increased, and meanwhile, the strength, the air tightness and other performances of the material are also reduced by air holes. On the other hand, titanium, as an extremely excellent metal material, is widely used in the field of engineering technology, particularly in the fields of aerospace and ship engineering.

At present, the aluminum-titanium alloy is reported in the literature, but the research on the foamed aluminum-titanium alloy is not reported yet.

Disclosure of Invention

The technical problem to be solved is as follows: the invention aims to provide a preparation method of a foamed aluminum-titanium alloy material, the prepared foamed aluminum-titanium alloy has uniform pore size distribution, the porosity reaches about 80 percent, the highest yield strength can reach 28.8MPa, and the mechanical property is good.

The technical scheme is as follows: a preparation method of a foamed aluminum-titanium alloy material comprises the following steps:

step 1: placing refined magnesium ingot and aluminum ingot in a reactor container, adding 2-3wt% of Ca particles in a mode of tin foil paper coating, and stirring for 5min at a rotation speed of 500 rpm;

step 2: heating to a heat preservation foaming temperature, adding a foaming agent with the content of 2-3wt%, stirring at the rotating speed of 800r/min for 30s, and preserving heat for 2 min;

and step 3: introducing argon, and adding titanium tetrachloride gas into the reactor container to react for 5-10min under the protection of argon;

and 4, step 4: removing the liquid magnesium chloride to obtain the foamed aluminum-titanium alloy material.

Further, the mass ratio of the magnesium ingot to the aluminum ingot in the step 1 is 1: 3-4.

Further, the preparation method of the foaming agent in the step 2 comprises the following steps:

1) preparing 2wt% of chitosan acetic acid solution and 1wt% of sodium alginate aqueous solution;

2) adding calcium carbonate into sodium alginate aqueous solution according to a certain proportion, and stirring to uniformly mix the calcium carbonate and the sodium alginate aqueous solution;

3) dropping the sodium alginate and calcium carbonate mixed solution into a calcium chloride/glutaraldehyde composite crosslinking agent with the concentration of 2wt% at a constant speed to obtain microspheres;

4) soaking the microspheres in a polyose acetic acid solution for 30min, and then placing the microspheres at 35 ℃ for vacuum drying to obtain the foaming agent.

Further, the temperature for heat preservation and foaming in the step 2 is 720-750 ℃.

Further, the amount of the gaseous titanium tetrachloride in the step 3 is just finished by reacting with the refined magnesium ingot.

Description of the drawings:

FIG. 1 is a graph showing the distribution of the pore size and the dimension in example 3.

Has the advantages that:

1. the invention adopts the calcium carbonate microspheres as the foaming agent, can improve the thermal decomposition temperature of the calcium carbonate and improve the porosity of the foamed aluminum-titanium alloy.

2. The invention uses magnesium to reduce titanium tetrachloride, and in the reduction process, the magnesium is mixed with aluminum alloy to further improve the uniformity and porosity of pores.

3. According to the invention, Ca particles are used as the tackifier, and after the Ca particles are added into the melt, the Ca particles can generate solid oxides at high temperature, so that the viscosity of the melt is improved, and the higher the temperature is, the more the quantity of the solid oxides is, the higher the viscosity is, the higher the porosity is, but the temperature cannot be too high.

4. The material has uniform pore size distribution, porosity of about 80 percent, highest yield strength of 28.8MPa and good mechanical property.

Detailed Description

Example 1

A preparation method of a foamed aluminum-titanium alloy material comprises the following steps:

step 1: placing refined magnesium ingots and aluminum ingots into a reactor container, adding 2wt% of Ca particles in a mode of tin foil paper coating, and stirring for 5min at a rotating speed of 500 rpm, wherein the mass ratio of the magnesium ingots to the aluminum ingots is 1: 3;

step 2: heating to the temperature of 720 ℃ for heat preservation and foaming, adding 2wt% foaming agent, stirring at the rotating speed of 800r/min for 30s, and preserving heat for 2 min;

and step 3: introducing argon, adding titanium tetrachloride gas into the reactor container to react for 5min under the protection of argon, and controlling the amount of the titanium tetrachloride gas to be just reacted with the refined magnesium ingot;

and 4, step 4: removing the liquid magnesium chloride to obtain the foamed aluminum-titanium alloy material.

The preparation method of the foaming agent comprises the following steps:

1) preparing 2wt% of chitosan acetic acid solution and 1wt% of sodium alginate aqueous solution;

2) adding calcium carbonate into sodium alginate aqueous solution according to a certain proportion, and stirring to uniformly mix the calcium carbonate and the sodium alginate aqueous solution;

3) dropping the sodium alginate and calcium carbonate mixed solution into a calcium chloride/glutaraldehyde composite crosslinking agent with the concentration of 2wt% at a constant speed to obtain microspheres;

4) soaking the microspheres in a polyose acetic acid solution for 30min, and then placing the microspheres at 35 ℃ for vacuum drying to obtain the foaming agent.

Example 2

A preparation method of a foamed aluminum-titanium alloy material comprises the following steps:

step 1: placing refined magnesium ingots and aluminum ingots into a reactor container, adding 2.3wt% of Ca particles in a mode of foil paper coating, and stirring for 5min at a rotating speed of 500 rpm, wherein the mass ratio of the magnesium ingots to the aluminum ingots is 1: 3.5;

step 2: heating to the temperature of 730 ℃ for heat preservation and foaming, adding 2.5wt% of foaming agent, stirring at the rotating speed of 800r/min for 30s, and preserving heat for 2 min;

and step 3: introducing argon, adding titanium tetrachloride gas into the reactor container to react for 7min under the protection of argon, and controlling the amount of the titanium tetrachloride gas to be just reacted with the refined magnesium ingot;

and 4, step 4: removing the liquid magnesium chloride to obtain the foamed aluminum-titanium alloy material.

The preparation method of the foaming agent comprises the following steps:

1) preparing 2wt% of chitosan acetic acid solution and 1wt% of sodium alginate aqueous solution;

2) adding calcium carbonate into sodium alginate aqueous solution according to a certain proportion, and stirring to uniformly mix the calcium carbonate and the sodium alginate aqueous solution;

3) dropping the sodium alginate and calcium carbonate mixed solution into a calcium chloride/glutaraldehyde composite crosslinking agent with the concentration of 2wt% at a constant speed to obtain microspheres;

4) soaking the microspheres in a polyose acetic acid solution for 30min, and then placing the microspheres at 35 ℃ for vacuum drying to obtain the foaming agent.

Example 3

A preparation method of a foamed aluminum-titanium alloy material comprises the following steps:

step 1: placing refined magnesium ingots and aluminum ingots into a reactor container, adding 2.6wt% of Ca particles in a mode of foil paper coating, and stirring for 5min at a rotating speed of 500 rpm, wherein the mass ratio of the magnesium ingots to the aluminum ingots is 1: 3.5;

step 2: heating to the temperature of 740 ℃ for heat preservation and foaming, adding 2-3wt% of foaming agent, stirring at the rotating speed of 800r/min for 30s, and preserving heat for 2 min;

and step 3: introducing argon, adding titanium tetrachloride gas into the reactor container to react for 8min under the protection of argon, and controlling the amount of the titanium tetrachloride gas to be just reacted with the refined magnesium ingot;

and 4, step 4: removing the liquid magnesium chloride to obtain the foamed aluminum-titanium alloy material.

The preparation method of the foaming agent comprises the following steps:

1) preparing 2wt% of chitosan acetic acid solution and 1wt% of sodium alginate aqueous solution;

2) adding calcium carbonate into sodium alginate aqueous solution according to a certain proportion, and stirring to uniformly mix the calcium carbonate and the sodium alginate aqueous solution;

3) dropping the sodium alginate and calcium carbonate mixed solution into a calcium chloride/glutaraldehyde composite crosslinking agent with the concentration of 2wt% at a constant speed to obtain microspheres;

4) soaking the microspheres in a polyose acetic acid solution for 30min, and then placing the microspheres at 35 ℃ for vacuum drying to obtain the foaming agent.

Example 4

A preparation method of a foamed aluminum-titanium alloy material comprises the following steps:

step 1: placing refined magnesium ingots and aluminum ingots into a reactor container, adding 3wt% of Ca particles in a mode of tin foil paper coating, and stirring for 5min at a rotating speed of 500 rpm, wherein the mass ratio of the magnesium ingots to the aluminum ingots is 1: 4;

step 2: heating to the temperature of 750 ℃ for heat preservation and foaming, adding 3wt% foaming agent, stirring at the rotating speed of 800r/min for 30s, and preserving heat for 2 min;

and step 3: introducing argon, adding titanium tetrachloride gas into the reactor container to react for 10min under the protection of argon, and controlling the amount of the titanium tetrachloride gas to be just reacted with the refined magnesium ingot;

and 4, step 4: removing the liquid magnesium chloride to obtain the foamed aluminum-titanium alloy material.

The preparation method of the foaming agent comprises the following steps:

1) preparing 2wt% of chitosan acetic acid solution and 1wt% of sodium alginate aqueous solution;

2) adding calcium carbonate into sodium alginate aqueous solution according to a certain proportion, and stirring to uniformly mix the calcium carbonate and the sodium alginate aqueous solution;

3) dropping the sodium alginate and calcium carbonate mixed solution into a calcium chloride/glutaraldehyde composite crosslinking agent with the concentration of 2wt% at a constant speed to obtain microspheres;

4) soaking the microspheres in a polyose acetic acid solution for 30min, and then placing the microspheres at 35 ℃ for vacuum drying to obtain the foaming agent.

Comparative example 1

The difference between the present embodiment and embodiment 1 is that the two embodiments use different foaming agents, and the present embodiment uses urea as the foaming agent, specifically:

a preparation method of a foamed aluminum-titanium alloy material comprises the following steps:

step 1: placing refined magnesium ingots and aluminum ingots into a reactor container, adding 2wt% of Ca particles in a mode of tin foil paper coating, and stirring for 5min at a rotating speed of 500 rpm, wherein the mass ratio of the magnesium ingots to the aluminum ingots is 1: 3;

step 2: heating to the temperature of 720 ℃ for heat preservation and foaming, adding 2wt% of urea, stirring at the rotating speed of 800r/min for 30s, and preserving heat for 2 min;

and step 3: introducing argon, adding titanium tetrachloride gas into the reactor container to react for 5min under the protection of argon, and controlling the amount of the titanium tetrachloride gas to be just reacted with the refined magnesium ingot;

and 4, step 4: removing the liquid magnesium chloride to obtain the foamed aluminum-titanium alloy material.

Testing of compression performance: a rectangular parallelepiped having a size of about 20 mm. times.10 mm was cut out from the sample of the example, and the surface of the sample was polished flat. The height h of the sample and the length and width of the cross section at the middle and both ends of the sample are measured by using a vernier caliper, the average value of the measurement is recorded as a, b, and the sectional area A is calculated. When the test is carried out, the cuboid sample is placed at the center of the supporting seat of the universal testing machine, uniform and slow loading is realized, and the descending speed of the crossbeam of the testing machine is 1 mm/min.

TABLE 1 indexes of properties of foamed Al-Ti alloy material

	Porosity/%	Yield strength/MPa
			Example 1	77.3	28.4
Example 2	78.1	28.7
			Example 3	79.8	28.8
Example 4	79.5	28.7
			Comparative example 1	64.2	23.1

Determination of pore size and size distribution for the material of example 3: the pore size distribution of the foam alloy material of example 3 was statistically determined using Image-Pro-Plus software to obtain the pore size distribution shown in FIG. 1. Statistical results show that the pore diameter of the foamed aluminum-titanium alloy is concentrated at most in the range of 0.9-1.0mm, wherein 82.2% of pores have an average diameter smaller than 1.2 mm; in addition, about 17.8% of holes with the diameter larger than 1.2mm exist in the foamed aluminum-titanium alloy.