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Effect of free-cutting additives on Machining Characteristics of Austenitic Stainless Steels

Journal of Materials Science & Technology 2010年第9期26卷 839-844页

作者： Zhuang Li Di Wu School of Materials Science and Engineering Shenyang University of Aeronautics and Astronautics Shenyang 110136 China State Key Laboratory of Rolling and Automation Northeastern University Shenyang 110004 China

The machinability tests were conducted by using a YD-21 dynamometer on a CA6161A *** experiments were conducted to determine the effect of free-cutting additives on machining characteristics of austenitic stainless *** conventional austenitic stainless steel 1Cr18Ni9Ti（steel A） and the free cutting austenitic stainless steel（steel B） were *** results have shown that machinable inclusions were composed of MnS and CuO,and they might be also *** presence of Bi in the inclusion was detected by the atom map and electro-probe microanalysis（EPMA）,which might be one of the most important factors to improve the machinability of austenitic stainless *** cutting forces for steel B were lower than those of steel A at various cutting speeds;the abrasion depth of the flank of the tool for steel B was less than that of the steel A under the same cutting *** machinability of austenitic stainless steel was visibly improved by adding free-cutting additives,such as S,Cu and *** tensile,yield strength,and total elongation values of the free cutting austenitic stainless steel were improved due to the addition of these free-cutting additives.

关键词： Austenitic stainless steel free-cutting additives Bismuth Machining characteristics Mechanical properties

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