Preparation method of high intensity Ti6Al4V diphase reinforced composite material

Abstract

The invention discloses a method for preparing a titanium-base high-strength composite material with two-phase of TiC and TiB as the particulate reinforcements, and Ti6A14V as the matrix. The method includes the following steps: titanium powder, aluminum-vanadium alloy powder, titanium diboride powder and titanium carbide powder are adopted as the raw materials, mixed in a certain proportion, dwelled by the mechanical pressure or the pressure at the fine pressure of 280-300MPa, pressed into a certain shape, sintered at the temperature of 1200 DEG C and reacted; then the sintered material is forged in different forging manners according to the purpose of the material and the condition of the product to be prepared; finally, the high-strength Ti6A14V two-phase reinforcement composite material can be obtained after heat treatment. The two-phase reinforcement composite material prepared by the method allows the tensile strength to be larger than 1200Mpa at the normal temperature and the percentage elongation after fracture to be above 4%, so as to be widely applied to titanium alloy parts on space air vehicles, seafaring ships, motorcars or sports equipment.

Description

technical field [0001] The invention relates to a preparation method of a titanium alloy composite material, in particular to Ti6Al4V as a matrix with TiC, TiB 2 A method for preparing a dual-phase reinforced composite material that is a particle reinforced phase. Background technique [0002] The content of titanium in the earth's crust is second only to magnesium (Mg), iron (Fe), and aluminum (Al), ranking fourth among metal elements. Titanium alloy material has become a material that has attracted people's attention due to its light weight, high specific strength, good medium and low temperature performance, and corrosion resistance. It has been widely used in aviation, aerospace and other civilian fields, such as automobiles, Sports equipment, etc. Ti6Al4V has become the most widely used titanium alloy material among many titanium alloy grades due to its excellent mechanical properties, and the composite material based on Ti6Al4V has also become the focus of much atten...

AI Technical Summary

Problems solved by technology

TiB 2 Ti6Al4V and TiC are the two most common particle reinforcements. Ti6Al4V materials based on these two particle reinforcements have also been widely studied, but the research objects are all single-phase reinforcement materials, and the performance differences of composite materials obtained by different preparation processes are compared. Big

From the reported results, by TiB 2 Or the addition of TiC, the tensile strength and elastic modulus of the material have been greatly improved, but in the high-strength titanium alloy material with a tensile strength greater than 1200MPa at room temperature, the elongation after fracture has dropped to 3%. following, which largely limits the application of the material