機械設(shè)計專業(yè)外文文獻(xiàn)翻譯-機械設(shè)計-展示頁
2025-01-31 06:07本頁面
【正文】 Temperature is correspondingly reduced. Consequently, these steels produce less crater wear, especially at high cutting speeds. Stainless Steels. Austenitic (300 series) steels are generally difficult to machine. Chatter can be s problem, necessitating machine tools with high stiffness. However, ferritic stainless steels (also 300 series) have good machinability. Martensitic (400 series) steels are abrasive, tend to form a builtup edge, and require tool materials with high hot hardness and craterwear resistance. Precipitationhardening stainless steels are strong and abrasive, requiring hard and abrasionresistant tool materials. The Effects of Other Elements in Steels on Machinability. The presence of aluminum and silicon in steels is always harmful because these elements bine with oxygen to form aluminum oxide and silicates, which are hard and abrasive. These pounds increase tool wear and reduce machinability. It is essential to produce and use clean steels. Carbon and manganese have various effects on the machinability of steels, depending on their position. Plain lowcarbon steels (less than % C) can produce poor surface finish by forming a builtup edge. Cast steels are more abrasive, although their machinability is similar to that of wrought steels. Tool and die steels are very difficult to machine and usually require annealing prior to machining. Machinability of most steels is improved by cold working, which hardens the material and reduces the tendency for builtup edge formation. Other alloying elements, such as nickel, chromium, molybdenum, and vanadium, which improve the properties of steels, generally reduce machinability. The effect of boron is negligible. Gaseous elements such as hydrogen and nitrogen can have particularly detrimental effects on the properties of steel. Oxygen has been shown to have a strong effect on the aspect ratio of the manganese sulfide inclusions。 Force and power requirements。 本科畢業(yè)設(shè)計（論文） 外文譯文 院 （系）： 機電工程學(xué)院 專 業(yè)： 機械設(shè)計制造及其自動化 姓 名： 學(xué) 號： 指導(dǎo)教師評語： 簽名： 年 月 日 外語文獻(xiàn)翻譯 摘自 : 《制造工程與技術(shù)（機加工）》（英文版） 《 Manufacturing Engineering and Technology— Machining》 機械工業(yè)出版社 2021 年 3 月第 1 版 頁— 564560P 美 s. 卡爾帕基安 (Serope kalpakjian) 施密德 (Steven ) 著 原文 ： MACHINABILITY The machinability of a material usually defined in terms of four factors: Surface finish and integrity of the machined part。 Tool life obtained。 Chip control. Thus, good machinability good surface finish and integrity, long tool life, and low force And power requirements. As for chip control, long and thin (stringy) cured chips, if not broken up, can severely interfere with the cutting operation by being entangled in the cutting zone. Because of the plex nature of cutting operations, it is difficult to establish relationships that quantitatively define the machinability of a material. In manufacturing plants, tool life and surface roughness are generally considered to be the most important factors in machinability. Although not used much any more, approximate machinab
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