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Quanzhou, China

Wei T.,Huuqiao University | Dai Q.,Huuqiao University
Jingangshi yu Moliao Moju Gongcheng/Diamond and Abrasives Engineering | Year: 2010

In this paper, effect of the mixing lime, sintering temperature as well as holding time on the alloying degree of Fe-based matrix were analyzed, and the influence of these sintering parameters on the mechanical properties of the metal bond were studied. Experimental results revealed that, by increasing the mixing time, sintering temperature, and holding time to a certain degree,the alloying degree of the metal matrix increased, thus a dense matrix with fine microstructure was obtained. However, when the sintering temperature raised to 860 °C or the mixing lime increased to 8 h, serious oxidation occurred in the metal matrix which led to a decrease in the mechanical properties of the metal bond. Source


Han G.,Huuqiao University | Huang G.,Huuqiao University | Huang H.,Huuqiao University | Guo H.,Huuqiao University | Xu X.,Huuqiao University
Jingangshi yu Moliao Moju Gongcheng/Diamond and Abrasives Engineering | Year: 2010

In this paper, the surface grinding of yttrium vanadate crystal with resin diamond wheel was carried out. The influences of grinding parameters, including wheel speed, feed rale and the depth of grinding on grinding forces and surface qualities were investigated. Hie results indicated thai grinding forces as well as surface roughness decreased with the increase of wheel speed, but increased with the increase of feed rate and the depth of grinding. It can be found also that the depth of grinding is the main influential factor on grinding forces, and wheel speed is the primary affecting factor on the surface roughness. The ground surface of yttrium vanadate was composed of fractured region and smooth region. When the wheel speed was 30 m/s, the width of crack on the fractured region was nearly 100 p.m. With the increase of grinding speed, the width of crack was reduced to 50 pjn, al the same time the percentage of smooth region was increasing. This may be resulted by the increase of plastic deformation. Source

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