本文選題：涂層硬質(zhì)合金刀具 + 奧氏體不銹鋼��； 參考：《材料科學(xué)與工程學(xué)報(bào)》2016年03期

【摘要】：為了深入探究涂層硬質(zhì)合金刀具切削奧氏體不銹鋼的切削機(jī)理,試驗(yàn)采用確定的進(jìn)給量和背吃刀量,只改變切削速度的單因素法,來(lái)研究切削速度對(duì)奧氏體不銹鋼工件加工表面質(zhì)量的影響以及涂層刀具的切削機(jī)理。采用JEOL JSM-6360LV掃描電子顯微鏡和EDS能譜儀對(duì)工件加工表面及磨損刀片進(jìn)行表面微區(qū)磨損形貌的觀(guān)察分析與組成成分分析,采用X射線(xiàn)衍射儀對(duì)工件表面物相組成進(jìn)行分析,采用激光掃描顯微鏡LSM對(duì)工件表面三維形貌進(jìn)行觀(guān)察分析。研究表明,切削速度較低時(shí),不銹鋼材料因材質(zhì)較軟,斷屑性能較差;速度較高時(shí),切削過(guò)程中粘著現(xiàn)象嚴(yán)重,致使摩擦剪應(yīng)力較大,摩擦表面發(fā)生形變,進(jìn)而誘發(fā)不銹鋼的馬氏體相變。因此,宜選用中速V=85m/min進(jìn)行切削,在此速度下,被加工件獲得的表面質(zhì)量較好,表面粗糙度Ra=3.679μm。刀具磨損主要發(fā)生在前刀面靠近刀尖的部位,磨損機(jī)理主要表現(xiàn)為粘著磨損。研究發(fā)現(xiàn),涂層硬質(zhì)合金刀具在體現(xiàn)出一定的良好切削性能的同時(shí)也不可避免地發(fā)生了磨損,所以深入研究其切削機(jī)理能夠豐富涂層刀具的切削理論,為提高涂層刀具在切削難加工材料時(shí)的刀具壽命以及拓展其在實(shí)際切削加工中的應(yīng)用范圍提供試驗(yàn)依據(jù)。
[Abstract]:In order to probe into the cutting mechanism of austenitic stainless steel cutting with coated carbide tools, the single factor method of changing the cutting speed was used to determine the feed rate and the back feed rate. To study the effect of cutting speed on the surface quality of austenitic stainless steel workpiece and the cutting mechanism of coated tool. JEOL JSM-6360LV scanning electron microscope and EDS energy spectrometer were used to observe and analyze the wear morphology of the workpiece surface and the wear blade. The phase composition of the workpiece surface was analyzed by X-ray diffractometer. The three-dimensional surface morphology of the workpiece was observed and analyzed by laser scanning microscope (LSM). The results show that when the cutting speed is low, the chip breaking performance of stainless steel is poor because of its softer material, and when the cutting speed is high, the adhesion in the cutting process is serious, which results in the large friction shear stress and the deformation of the friction surface. Then the martensitic transformation of stainless steel is induced. Therefore, the medium speed V=85m/min is suitable for cutting. At this speed, the surface quality of the workpiece is better and the surface roughness is Ra=3.679 渭 m. Tool wear occurs mainly in the front face near the tip of the tool, and the wear mechanism is mainly adhesive wear. It is found that the coated cemented carbide tools exhibit a certain good cutting performance and wear inevitably at the same time, so further study of the cutting mechanism can enrich the cutting theory of coated cutting tools. The experimental basis is provided for increasing the tool life of coated tool in cutting difficult materials and expanding its application scope in actual cutting.
【作者單位】： 陜西科技大學(xué)機(jī)電工程學(xué)院;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(51405278) 陜西省教育廳專(zhuān)項(xiàng)科研計(jì)劃資助項(xiàng)目(14JK1082) 陜西科技大學(xué)引進(jìn)博士科研啟動(dòng)基金資助項(xiàng)目(BJ11-0)
【分類(lèi)號(hào)】：TG711

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相關(guān)期刊論文 前10條

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本文編號(hào)：1968573