Study on Wear resistance and Corrosion resistance of TiN synthesized by Plasma Permeating Technique
Using double glow plasma surface alloying technique, titanizing was conducted on the surface of Q235 steel and tens of microns titanium solid solution diffusion layer formed. Later nitrogen gas was blown to synthesis TiN permeation layer directly. The surface microstructure, component concentration, hardness and phase analysis of TiN permeation layer were tested，and the wear resistance and corrosion resistance were analyzed. The results show that the surface morphology of TiN permeation layer is cell shape. The golden yellow TiN grains are compact and uniform. TiN permeation layer is composed of external deposition layer and diffusion layer with evenly distributed TiN particles. The composition and structure of TiN permeation layer are in gradient distribution. The thickness is 16 μm. And it also is metallurgical bonding with substrate and cohesion force is better without any spallation phenomenon. The surface Ti/N atomic ratio of TiN permeation layer is close to 1:1 and average surface micro-hardness is 3120 HV. Under the same conditions, TiN permeation layer has the least relative wear rate. Its wear resistance is 7.81 times higher than that of untreated Q235 steel, 5.625 times higher than that of quenched+tempered T10 steel and 7 times higher than that of nitrided 3Cr13 steel. In l mol/L H2SO4 solution, the corrosion resistance of TiN permeation layer is increased 11.5 times compared with untreated Q235 steel and 2.65 times compared with 1Crl8Ni9Ti stainless steel. In 3.5 % NaCl solution, its corrosion resistance is increased almost 11.3 times compared with untreated Q235 steel, but a little lower than 1Crl8Ni9Ti stainless steel. Compared with its corrosion resistance in salt solution, the corrosion resistance of TiN permeation layer is better in acidic solution. In 4 % NaOH solution, the corrosion resistance of TiN permeation layer is increased 27.8 times compared with untreated Q235 steel and close to 1Cr18Ni9Ti stainless steel.
Gao Yuan Wang Chenglei
School of Material Science and Engineering, Guilin university of Electronic Technology, Guilin,Guang School of Material Science and Engineering, Guilin university of Electronic Technology, Guilin, Guan
国际会议
桂林
英文
1-7
2010-11-16（万方平台首次上网日期，不代表论文的发表时间）