Wear Mechanism of Cemented Carbide Tool in High Speed Milling of Stainless Steel

Adhesion of cutting tool and chip often occurs when machining stainless steels with cemented carbide tools. Wear mechanism of cemented carbide tool in high speed milling of stainless steel 0Cr13Ni4 Mo was studied in this work. Machining tests on high speed milling of 0Cr13Ni4 Mo with a cemented carbide tool are conducted. The cutting force and cutting temperature are measured. The wear pattern is recorded and analyzed by high?speed camera, scanning electron microscope(SEM) and energy dispersive X?ray spectroscopy(EDS). It is found that adhesive wear was the dominant wear pattern causing tool failure. The process and microcosmic mechanism of the tool’s adhesive wear are analyzed and discussed based on the experimental results. It is shown that adhesive wear of the tool occurs due to the wear of coating, the a nity of elements Fe and Co, and the grinding of workpiece materials to the tool material. The process of adhesive wear includes both microcosmic elements di usion and macroscopic cyclic process of adhe?sion, tearing and fracture.

Novel photocatalytic reactor for degradation of DDT in water and its optimization model

一张新奇相片催化反应堆被开发搬迁(从水的 1,1 二度(4-chlorophenyl )-2,2,2-trichloroethane)(DDT ) 。在反应堆， cenosphere 被用来支持借助于大音阶的第五音胶化做的 TiO 2 电影。因为 cenospheres 与 TiO 2, 是涂的，他们的比重稍微从原版被增加 0.6 ∼0.8 到 0.8 ∼0.9，以便他们能在水里被推迟。与 bubbler 的混合操作，在反应堆的水处于一个使流体化得好的状态。反应堆的底部是一张沙过滤器床，它能被用来阻止光催化剂被失去。反应堆的一个数学模型在二个主要有影响的因素被开发了：紫外(紫外) 轻紧张和光催化剂集中。与如此的一个模型一起，反应堆能更相当被设计。