Method for preparing aluminum-free magnesium-based composite materials by aid of Al-Ti-X self-propagating systems

Abstract

The invention provides a method for preparing aluminum-free magnesium-based composite materials by the aid of Al-Ti-X (the X is an element B or an element C) self-propagating systems. By the aid of the method, the problem of incapability of applying existing Al-Ti-X self-propagating systems to aluminum-free magnesium alloy can be solved. The method includes preparation procedures of melting aluminum-free magnesium-based melt without Zr elements; selecting the Al-Ti-B or Al-Ti-C self-propagating systems and carrying out in-situ synthesis by the aid of self-propagating high-temperature synthesis processes to obtain magnesium-based composite material melt with reinforced particles; adding elements Y into the magnesium-based composite material melt to consume post-reaction residual Al of the Al-Ti-X self-propagating systems and eliminating poisoning effects of the residual Al on Zr; adding the Zr elements into the magnesium-based composite material melt; molding the composite material melt by means of casting to obtain the in-situ particle-reinforced aluminum-free magnesium-based composite materials. The method has the advantages of simple process, low production cost and applicability to mass production.

Description

technical field

[0001] The invention belongs to the technical field of metallurgy, and relates to a method for preparing a magnesium-based composite material, in particular to a method for preparing an aluminum-free magnesium-based composite material using an Al-Ti-X self-propagating system. Background technique

[0002] Compared with magnesium alloys, magnesium-based composites have obvious advantages in terms of strength, hardness and wear resistance. In recent years, due to the great potential of magnesium-based composites in the field of weight reduction, especially in the automotive and aviation industries, they have been favored by material researchers and manufacturers.

[0003] Due to the relatively simple preparation process and isotropic characteristics, particle-reinforced magnesium-based composites have become an important research direction in magnesium-based composites. Traditionally, reinforcing particles are directly introduced into the alloy melt by means o...

Examples

Embodiment 1

[0017] Step 1, using magnesium ingots and zinc ingots to smelt Mg-6Zn magnesium-based melts;

[0018] Step 2: Select the Al-Ti-B self-propagating system, ignite the self-propagating reaction in the vacuum heating device, and synthesize TiB in situ 2 Reinforce the particles, and then add the reacted Al-Ti-B prefabricated block into the magnesium liquid to prepare a Mg-6Zn magnesium-based composite material melt; the mass ratio of the added self-propagating prefabricated block to the magnesium-based melt is 10 : 100;

[0019] Step 3, adding Y element to the magnesium-based composite material melt and stirring, so that it consumes the residual Al element after the reaction of the Al-Ti-B system to obtain a composite material melt; the atomic ratio of the Y element to the residual Al element is 1 :2.

[0020] Step 4, adding the Zr element into the melt of the composite material, and fully stirring. After heat preservation and standing, cast and form to obtain in-situ TiB 2 Par...

Embodiment 2

[0022] Step 1, using magnesium ingots and zinc ingots to smelt Mg-8Zn magnesium-based melts;

[0023] Step 2: Select the Al-Ti-C self-propagating system, add the Al-Ti-C prefabricated block directly into the magnesium liquid, use the magnesium liquid to ignite the self-propagating reaction at high temperature, and synthesize TiC reinforced particles in situ, thus obtaining Mg- 8Zn magnesium-based composite material melt; the mass ratio of the added self-propagating prefabricated block to the magnesium-based melt is 4:100;

[0024] Step 3, adding element Y to the melt of the magnesium-based composite material and stirring to consume the residual Al element after the reaction of the Al-Ti-C system. The atomic ratio of the added amount of Y element to the residual Al element is 1.1:2.

[0025] Step 4, adding the Zr element into the melt of the composite material, and fully stirring. After standing still for heat preservation, it was poured and molded to obtain in-situ TiC parti...

technical field

[0001] The invention belongs to the technical field of metallurgy, and relates to a method for preparing a magnesium-based composite material, in particular to a method for preparing an aluminum-free magnesium-based composite material using an Al-Ti-X self-propagating system. Background technique

[0002] Compared with magnesium alloys, magnesium-based composites have obvious advantages in terms of strength, hardness and wear resistance. In recent years, due to the great potential of magnesium-based composites in the field of weight reduction, especially in the automotive and aviation industries, they have been favored by material researchers and manufacturers.

[0003] Due to the relatively simple preparation process and isotropic characteristics, particle-reinforced magnesium-based composites have become an important research direction in magnesium-based composites. Traditionally, reinforcing particles are directly introduced into the alloy melt by means o...

Examples

Embodiment 1

[0017] Step 1, using magnesium ingots and zinc ingots to smelt Mg-6Zn magnesium-based melts;

[0018] Step 2: Select the Al-Ti-B self-propagating system, ignite the self-propagating reaction in the vacuum heating device, and synthesize TiB in situ 2 Reinforce the particles, and then add the reacted Al-Ti-B prefabricated block into the magnesium liquid to prepare a Mg-6Zn magnesium-based composite material melt; the mass ratio of the added self-propagating prefabricated block to the magnesium-based melt is 10 : 100;

[0019] Step 3, adding Y element to the magnesium-based composite material melt and stirring, so that it consumes the residual Al element after the reaction of the Al-Ti-B system to obtain a composite material melt; the atomic ratio of the Y element to the residual Al element is 1 :2.

[0020] Step 4, adding the Zr element into the melt of the composite material, and fully stirring. After heat preservation and standing, cast and form to obtain in-situ TiB 2 Par...

Embodiment 2

[0022] Step 1, using magnesium ingots and zinc ingots to smelt Mg-8Zn magnesium-based melts;

[0023] Step 2: Select the Al-Ti-C self-propagating system, add the Al-Ti-C prefabricated block directly into the magnesium liquid, use the magnesium liquid to ignite the self-propagating reaction at high temperature, and synthesize TiC reinforced particles in situ, thus obtaining Mg- 8Zn magnesium-based composite material melt; the mass ratio of the added self-propagating prefabricated block to the magnesium-based melt is 4:100;

[0024] Step 3, adding element Y to the melt of the magnesium-based composite material and stirring to consume the residual Al element after the reaction of the Al-Ti-C system. The atomic ratio of the added amount of Y element to the residual Al element is 1.1:2.

[0025] Step 4, adding the Zr element into the melt of the composite material, and fully stirring. After standing still for heat preservation, it was poured and molded to obtain in-situ TiC parti...