What are the advantages of titanium alloy board compared with other material sheets?

Titanium alloys are widely used because of their series of excellent properties. However, titanium alloys have high friction coefficients, are very sensitive to adhesive wear and fretting wear, have poor wear resistance, are easy to catch fire at high temperature and high-speed friction, and have relatively poor resistance to high-temperature oxidation. The shortcomings seriously affect the safety and reliability of its structure and greatly limit its application. Therefore, improving the surface properties of titanium alloys such as wear resistance, high-temperature oxidation resistance, and corrosion resistance is a problem that needs to be solved urgently. In addition to improving the alloy composition and preparation process, surface modification of titanium alloys is currently the most effective method.

In recent years, electron beam surface treatment technology has developed rapidly. When the electron beam with high energy density acts on the surface of the material, the surface of the material has physical, chemical, or mechanical properties that are difficult to achieve by conventional methods, and the wear resistance and corrosion resistance of the material surface is significantly improved. And high-temperature oxidation resistance. A domestic engineering technology company used pulsed high-current low-energy electron beams for surface treatment of titanium alloys and achieved good results.

The material used in the experiment is TA15 titanium alloy (Ti-6.5Al-2Zr-1Mo-1V). After the surface of the sample is polished, the surface is modified with a high-current pulsed electron beam. The electron beam acceleration voltage is 27kV, the target distance is 80mm, and the pulse The number of times is 10, and the pulse interval is 45s.

The hardness test of the obtained sample shows that as the depth increases, the hardness value first decreases and then increases, and finally tends to a fixed value. This special oscillating curve distribution can be explained as: under the pulsed high-energy rapid irradiation, a heating shock wave will sprout in the energy absorbing layer of the material, and it will be reflected back when it encounters the interface. Multiple irradiations cause interference and superposition of stress waves with each other, presenting a complex stress distribution state, and causing a special distribution of cross-section microhardness.

The wear volume of the sample after electron beam treatment is 3 times higher than that of the original sample, indicating that the wear resistance of TA15 titanium alloy after electron beam treatment is improved. The reasons may be the following three aspects:

(1) The high energy of the electron beam is instantly deposited in a small area of ​​the subsurface layer of the material, so that the material quickly rises to the phase transition temperature or the melting temperature, and then the heat conduction of the matrix achieves ultra-high-speed cooling (about 109K/s) to make the material surface The quenching effect occurs, which plays a role of solid solution strengthening, so the wear resistance of the surface is improved;

(2) The electron beam rapid solidification process will refine the grains of the surface layer of the material, thereby improving the wear resistance of the material;

(3) When the electron beam pulse acts on the surface of the material, the temperature begins to rise rapidly. As the rapid outward thermal expansion of the material surface is constrained, an inwardly propagating compressive thermal stress wave is generated. The residual stress forms a compressive stress distribution, which is beneficial to improve wear resistance.
Grade 36 Titanium Rod     Grade 12 Titanium Wire     titanium tubing for bike frame     Grade 1 Titanium Tube