共查询到19条相似文献,搜索用时 171 毫秒
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陶瓷刀具干式车削淬硬钢试验研究 总被引:1,自引:0,他引:1
通过切削试验。得到了陶瓷刀具CC650干式车削渗碳淬硬钢20CrMnTi的磨损曲线。并利用扫描电子显微镜。观察了刀具的磨破损形貌,对刀具磨损区进行了元素含量的能谱分析。得出了刀具的磨损机理。 相似文献
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通过采用涂层硬质合金刀具对淬硬 4 5钢硬态干式切削试验 ,分析硬态干式切削淬硬钢的特点 ,研究了涂层硬质合金刀具及其几何参数的优化 ,讨论了涂层硬质合金刀具磨损形式、刀具耐用度及加工表面粗糙度 ,得出了可应用于实际干式切削加工的切削条件和参数 相似文献
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涂层硬质合金刀具干式切削淬硬钢的试验研究 总被引:1,自引:0,他引:1
通过采用涂层硬质合金刀具对淬硬45钢硬态干式切削试验,分析硬态干式切削淬硬钢的特点,研究了涂层硬质合金刀具及其几何参数的优化,讨论了涂层硬质合金刀具磨损形式、鼠具耐用度及加工表面粗糙度,得出院要中应用于实际干式切削加工的切削条件和参数。 相似文献
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《机电产品开发与创新》2021,34(5)
通过20CrMnTi渗碳淬硬钢切削加工试验,分析了YT726硬质合金刀具的磨损机理。研究结果表明:硬质合金加工20CrMnTi渗碳淬硬钢,刀具的前刀面发生了月牙洼磨损,后刀面除了发生机械磨损外,还发生了粘结磨损和扩散迁移磨损,刀具基体中的Co、 W、 C等元素向件扩散,工件材料中的Cr、 Ti、 Fe、Mn等元素向刀具扩散,导致刀具强度和硬度的下降,从而降低刀具的使用寿命。 相似文献
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硬态干式车削淬硬钢SKD11表面粗糙度试验研究 总被引:3,自引:0,他引:3
应用单因素法研究了PCBN 刀具硬态干式切削淬硬钢SKD11过程中,进给量、切削速度、背吃刀量、刀尖圆弧半径和倒棱宽度等参数对表面粗糙度的影响规律. 相似文献
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利用微波烧结技术制备了Ti(C,N)/Al_2O_3金属陶瓷刀具(TA),并通过高速干式切削淬硬钢40Cr(50±2HRC)研究刀具的切削性能,同时与硬质合金刀具YT15进行对比。采用正交试验和极差分析法,以切削参数为优化对象,以工件金属去除率、表面粗糙度和刀具寿命为优化目标,确定了刀具的最佳切削用量。试验结果表明,切削淬硬钢40Cr时,刀具TA的最优切削参数为v=120m/min、a_p=0.3mm、f=0.1mm/r。TA刀具的切削时间为66min,比YT15提高了175%。工件平均表面粗糙度为1.27μm,比硬质合金刀具降低了15.9%。刀具的切削性能优于硬质合金刀具,并且可以实现以车代磨。 相似文献
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Machining of austenitic stainless steels using CVD multi-layer coated cemented carbide tools 总被引:3,自引:0,他引:3
This paper presents the results of experimental work in dry turning of austenitic stainless steels (AISI 304 and AISI 316) using CVD multi-layer coated cemented carbide tools. The turning tests were conducted at four different cutting speeds (120, 150, 180 and 210 m/min) while feed rate and depth of cut were kept constant at 0.16 mm/rev and 1 mm, respectively. The cutting tools used were TiC/TiCN/TiN and TiCN/TiC/Al2O3 coated cementide carbides. The influences of cutting speed, cutting tool coating top layer and workpiece material were investigated on the machined surface roughness and the cutting forces. The worn parts of the cutting tools were also examined under scanning electron microscope (SEM). The results showed that cutting speed significantly affected the machined surface roughness values. With increasing cutting speed, the surface roughness values decreased until a minimum value is reached beyond which they increased. 相似文献
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针对高温合金高速干切削刀具磨损严重、加工表面质量差等突出问题,基于清洁切削技术,采用硬质合金涂层刀具进行高速铣削高温合金GH2132试验,研究干式切削、液氮不同喷射温度对涂层刀具切削性能以及加工表面完整性的影响规律,探究运用清洁切削高温合金来延长涂层刀具寿命和提高加工表面质量的可行性。研究表明:液氮低温切削GH2132时的切削合力随喷射温度的降低而增大,切削区温度在-150~-190℃喷射时已完全处于低温状态;随着液氮喷射温度的降低,刀具涂层剥落面积明显减小,且降低了黏结磨损和氧化磨损,在-150℃喷射条件下可获得较长的刀具寿命;加工表面粗糙度Sa在-30~-150℃喷射条件下获得较小值,随喷射温度的降低,加工硬化和残余拉应力分别增大和减小;与干式切削相比,液氮切削喷射温度在-150~-190℃下可显著延长涂层刀具寿命并提高加工表面质量。 相似文献
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Soumya Gangopadhyay Ranadip Acharya Ajay Kumar Chattopadhyay Vikas Gulabrao Sargade 《Machining Science and Technology》2013,17(2):208-223
In the present investigation, AA6005 (ISO: AlSiMg) alloy was machined in turning operation with different cutting tools, such as uncoated cemented carbide insert, PVD TiN coated, CVD diamond coated and PCD insert, under dry environment. Effect of cutting speed was studied for each of the cutting tools with regard to the formation of built-up layer (BUL) or built-up edge (BUE). The rake surface of the tools was characterized by optical microscopy, scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) spectroscopic microanalysis. Particular emphasis was given on wear mechanism of PVD TiN coated insert, conventionally used in machining ferrous alloys, during dry turning of AA6005 alloy. It has been observed that increase of cutting speed from 200 m/min to as high as 1000 m/min could not substantially reduce formation of BUL over tool rake surface during dry machining of AA6005 alloy with uncoated or PVD TiN coated cemented carbide inserts. The potential of diamond-based tools in dry machining of aluminium alloy was also studied. Finally, the effect of cutting speed on surface finish of the workpiece machined with different cutting tools was studied during dry turning of AA6005 alloy. 相似文献