 Wysłany: Nie 9:04, 09 Sty 2011 Temat postu: moncler outlet Ni60 self-fluxing alloy Analysis of |
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Ni60 self-fluxing alloy Analysis of High Frequency Induction Cladding Down the formation of white band. Diffusion transition zone is thus the product of solid diffusion. Segregation rather than the coating composition to form a solid solution. White band of the specific components and characteristics of experimental and have yet to be further tested. But the white band as a typical induction remelting coating has been quite a few scholars agree []. 2.2 The coating can be seen from Figure 2a. Coating from the substrate to the surface there is a clear columnar crystals perpendicular to the substrate interface distribution. Show that the coating nucleation and growth start from the interface. This is because the interface between bond coating large vortex,Laguna Beach Jeans, boundary layer at high temperature, longer time in the molten state, while the surface temperature is lower, the cooling speed. Therefore, the impact of coating the heat transfer direction, the interface means the grain to dendrite growth. Coating the surface of the cooling rate is faster because the formation of a thin layer of equiaxed grains. Segregation also more uniform interface. Bright white coating dendritic organizations Ni, Cr, Fe, Si in solid solution, and solid solution dispersed in the distribution of black particles, black needle with other organizations for Ni eutectic alloy (Fig. 2b). Previous researchers have done with X-ray diffraction analysis, microstructure photographs and EDS analysis,belstaff outlet, the coatings is mainly a solid solution in Ni block on distribution of organizations, carbides and borides hard eleven b Figure 2 coating solution corrosion topography FeC1 a 34 a Hubei Automotive Industries Institute in September 2005 media phase (Fig. 2b,ugg stiefel, black particles in the white block). Wear-resistant coating is rich in the phase, a coating has good wear resistance of the foundation. 2-3 Distribution of the coating hardness is used in this test Direct Air after coating remelting. Therefore, the matrix ferrite and Soxhlet (Fig. 3). Figure 4 Measurement of coating thickness is about 1.5mm, the sample from the surface of the coating to the substrate hardness distribution shown in Figure 5,oakley sunglasses, the lower hardness of heart about 160HV. From Figure 5 the measured hardness distribution of the coating can be clearly seen that the highest coating hardness can reach more than 800HV. From the table to the gradient in the hardness gradually decreased. To 2mm from the surface hardness of the substrate at the same hardness. Also shows the distribution from the hardness gradient coating after coating interface of the spread of melting. A transition zone exists. And the coating hardness than the matrix hardness. One by one in Figure 3 Figure 4 matrix morphology of the coatings are not corrosion coating microhardness Figure 5 3 Conclusions 1) High Frequency Induction Cladding Ni60 coating and the substrate body into a good metallurgical bond between them formed a diffusion transfer layer white band. 2) High Frequency Induction Cladding Ni60 coating is hypoeutectic, the first precipitation of the Ni solid solution for the distribution of dendritic crystals perpendicular to the interface. Coating is rich in the distribution of enhanced wear resistance of the hard phase. 3) high frequency induction melting higher than the substrate coated with the coating hardness up to 800HV or more. Between the coating and the substrate hardness in the form of lower gradient. More articles related to topics： uggs boots italia Fly Ash in Cement Concrete Pavem ghd glätteisen Semi-rigid road base material shrin christian louboutin pas cher Sand Wick Constructio |
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