陶瓷刀具材料的现状与发展

本文阐述了陶瓷刀具材料的发展现状 ,着重论述了氧化铝系陶瓷和氮化硅系陶瓷材料技术。对陶瓷刀具材料的发展趋势进行了综述。指出超微粉刀具、复相陶瓷刀具、涂层刀具及金属陶瓷是陶瓷刀具材料的研究方向。     

高速切削刀具材料的开发与选择

介绍了高速切削加工技术所使用的高速钢刀具、陶瓷刀具、涂层刀具、超硬刀具的性能特点及应用,探讨了选择刀具所考虑的因素。     

新型陶瓷刀具材料的研究与开发

工业用钢材的质量提高使材料加工难度增加,耐高温的高硬度高强度陶瓷材料被用做切削刀具并逐渐推广应用。本文对陶瓷刀具的材质、种类、性能特点作了比较和评价,并重点介绍了新型的晶须增韧陶瓷刀具。最后,对陶瓷刀具的市场前景进行了预测,并指出了陶瓷刀具研制方面应该深入研究的课题。     

物理和化学相容性及其对陶瓷刀具材料JZ—2—1力学性能的影响

本文首先研究了新型复相陶瓷刀具材料ＪＺ－２－Ｉ的物理和化学相容性；其次研究了复合材料相容性对刀具材料力学性能的影响，结果表明，ＪＸ－２－Ｉ材料中，各组成相之间具有较好的物理相容性和化学相容性，这有利于改善陶瓷材料的性能。     

新型Ti(C,N)基金属陶瓷刀具的磨损性能

金属陶瓷由于具有优良的综合性能而广泛用作刀具材料.本文研究了纳米TiN改性TiC基金属陶瓷刀具的组织及其在加工正火态45号钢时的磨损性能.结果表明,与传统金属陶瓷相比,新型金属陶瓷的组织更细小.与传统金属陶瓷刀具、Al2O3刀具及YT15硬质合金刀具相比,新型金属陶瓷刀具具有更高的刀具寿命和切削效率,且主要以"磨损"形式失效.     

PcBN刀具在干切削中的应用研究

文章探讨了干切削对刀具、工件和机床的要求,并从PcBN刀具干切削金属软化效应、加工表面质量以及刀具磨损等方面介绍了PcBN刀具在干切削中的适应性研究方面的进展情况,以期引起重视,更充分发挥PcBN刀具的潜在性能。     

陶瓷刀具材料及应用技术

陶瓷刀具具有优良的切削性能，在金属切削加工中越来越受到重视。本文对陶瓷刀具的种类、性能和应用进行了论述，并指出陶瓷刀具材料的发展方向。     

新型陶瓷刀具的切削性能研究

本文研究了山东工业大学机械工程学院研制的新型陶瓷刀具材料（包括ＪＸ－２，Ｈ５，Ｈ１３和Ｈ２１等）分别切削铸铁（ＨＴ２０）淬火４５号钢和难加工材料ＧＨ９９时的切削性能，探讨了各陶瓷刀具的抗磨损能力，实验研究了切削速度和进给量对刀具磨损的影响，并对切削条件进行了优化。     

梯度功能陶瓷刀具材料的残余应力设计及制备

根据陶瓷刀具切割时刀楔内的应力分布规律及刀具损坏机理的分析,首次提出以陶瓷刀具材料的组成分布进行设计以及梯度的模型,通过对不同组成分布的刀具材料制备过程中的残余应力及刀具切削过程中的热应力,机械应力进行模拟,以残余应力与外加应力部分抵消为目标优化设计了梯度组成分布,按设计结果,采用粉末铺填－热压烧结工艺研制成功Ａｌ２Ｏ３／ＴｉＣ系梯度功能陶瓷刀具材料。     

物理和化学相容性及其对陶瓷刀具材料JX-2-1力学性能的影响

本文首先研究了新型复相陶瓷刀具材料JX-2-I的物理和化学相容性;其次研究了复合材料相容性对刀具材料力学性能的影响,结果表明,在JX-2-I材料中,各组成相之间具有较好的物理相容性和化学相容性,这有利于改善陶瓷刀具材料的性能。     

高速钢刀具固体润滑涂层的研究

为了解决高速钢刀具磨损快的问题,延长刀具使用寿命,通过研究磷化处理加固体润滑涂层的工艺方法,在刀具表面制备出了以wS2为主的固体润滑涂层.实验证明:在外加磁场(3.0×10-3T)作用下,刀具表面磷化膜的粗糙度得到较好的控制;此时进行固体润滑剂涂覆刀具处理,涂层厚度达4.935 μm,刀具使用寿命最高,比未进行处理的刀...     

Experimental investigation of different morphology textured ceramic tools by in-situ formed for the dry cutting

Surface texture is considered an important measure to improve the cutting performance of a tool. In this study, we have prepared three types of textured and conventional tools on the rake face by an in-situ formed method. During the experiment, the best parameters of three types of textured tools were selected for dry cutting AISI 1045 steel at different cutting speeds. Cutting forces, cutting temperatures, workpiece surface roughness, and tool wear were measured during the cutting process. The results showed that textured tools have significantly reduced cutting force, cutting temperature, and tool wear, and the roughness of the workpiece was improved compared with the conventional tool. The micro-pit texture tool has less stress contact region than the micro-groove width texture tool, but the micro-groove width texture tool exhibiting the best cutting performance. This investigation clearly showed that the textured tool prepared by the in-situ formed method has improved cutting performance.     

粉末涂层陶瓷材料的切削性能及磨损机理

对粉末涂层陶瓷材料FTC1和FTC2的切兴旺性能进行了实验,并对其磨损机理进行了探讨。实验证明FTC1和FTC2完全可以作为刀具材料使用,并且在中低速度下切削调质45号钢和淬硬T10A工具钢时,FTC1和FTC2具有比YB01更好的切削性能。在切削淬硬T10A工具钢时,YB01的后刀面有明显的塑性磨损特征,而FTC1的后刀面的磨损主要是磨粒磨损和粘结磨损,FTC2的后刀面挤压磨损特征较明显。     

Investigation of novel multiscale textures for the enhancement of the cutting performance of Al2O3/TiC ceramic cutting tools

Currently, the high temperature and severe friction conditions at the tool-chip interface are the main reasons for ceramic tool wear failures. Surface texturing as a geometric extension for cutting tools is a promising way to extend their service life. In this study, a novel type of multiscale texture was developed, and its effect on the cutting performance of an Al₂O₃/TiC ceramic cutting tool while machining AISI H13 steel was explored in a conventional cooling environment. The cutting force, cutting temperature, and tool wear morphology were investigated at cutting velocities ranging from 80 to 249 m/min. Microgroove textured Al₂O₃/TiC ceramic tools were prepared for comparison. The results show that the structure of the multiscale textures maintained good integrity over the range of cutting velocities. Thus, the synergistic effect of the microscale and nanoscale textures promoted the introduction and permeation of the cutting fluid. Therefore, the multiscale textures effectively enhanced the cutting performance of the Al₂O₃/TiC ceramic tools.     

High-entropy carbide-based ceramic cutting tools

In this study, a novel high-entropy carbide-based ceramic cutting tool was developed. The cutting performance of three kinds of high-entropy carbide-based ceramic tools with different mechanical properties for the ISO C45E4 steel were evaluated. Although the pure (Ti_0.2Zr_0.2Nb_0.2Ta_0.2Mo_0.2)C_0.8 ceramic cutting tool exhibited the highest hardness of 25.06 ± 0.32 GPa, the cutting performance was poor due to the chipping and catastrophic failure caused by the low toughness (2.25 ± 0.27 MPa m^1/2). The (Ti_0.2Zr_0.2Nb_0.2Ta_0.2Mo_0.2)C_0.8–15 vol% cobalt cutting tool with highest fracture toughness (6.37 ± 0.24 MPa m^1/2) and lowest hardness (17.29 ± 0.79 GPa) showed the medium cutting performance due to the low wear resistance caused by the low hardness. The (Ti_0.2Zr_0.2Nb_0.2Ta_0.2Mo_0.2)C_0.8–7.7 vol% cobalt cutting tool showed the longest effective cutting life of ∼67 min due to the high wear resistance and chipping resistance caused by the high hardness (21.05 ± 0.72 GPa), high toughness (5.35 ± 0.51 MPa m^1/2), and fine grain size (0.60 ± 0.15 μm). The wear mechanisms of the cobalt-containing (Ti_0.2Zr_0.2Nb_0.2Ta_0.2Mo_0.2)C_0.8 ceramic cutting tools included adhesive wear and abrasive wear and oxidative wear. This research indicated that the high-entropy carbide-based ceramics with high hardness and high toughness have potential use in the field of cutting tool application.     

Si3N4陶瓷刀具在切削淬硬钢时的磨损行为

采用两种Ｓｉ２Ｎ４刀具在普通车床上对ＣｒＷＭｎ和４５钢进行切削试验，并用ＳＥＭ，ＥＤＡＸ，ＸＰＳ等方法对刀具的磨损进行分析。结果指出：试验的陶瓷刀具材料在切削不同淬硬钢时均存在最佳切削速度。在ＦＤ０１相比，ＦＤ０２陶瓷刀具有更佳的切削性能，最佳切削速度可提高７８％。在最佳速度以下切削，刀具侧面将发生粘着磨损；在最佳速度以上，则被加工材料产生微区熔化，导致材料大面积转移，发生剥层磨损，最佳速度以下切     

新型陶瓷刀具的应用研究

本文详细研究了新型陶瓷刀具APW（Al2O3／SiCw／SiCp）系列的切削性能．研究结果表明：在加工不锈钢时,APW3的抗磨损能力好于APW1,而JX—1最差;在高速湿切削高温镍基会金Inconel718（GH169）时,APW1的抗磨损能力好于JX－1,而硬质合金刀具YG8（K30）最差;高速切削时必须使用切削液,由于切削温度对工件材料加工硬化和高温镍基合金Inconel718强度屈服拐点的影响而存在一个最佳的切削速度范围。     

Improvement of cutting performance of SiAlON ceramic by texture engineering in turning superalloys

High speed and high efficiency machining of superalloy is a big technological challenge faced by the cutting tool industry in the world. In the present study, cutting performance of nickel-based superalloy was significantly improved by engineering the texture of SiAlON ceramic cutting tools with grains oriented parallel to the cutting edge. Orientation of the rod-like grains played a significant role in the wear resistance of SiAlON ceramic. With the rod-like grains parallel to the cutting edge of the tool, the resistance to notched wear and peeling was much higher, resulting in slow and stable flank and rake wear. The tool life of the textured tool with rod-like grains parallel to the cutting edge was 17% higher than that of the untextured tool. On the other hand, for the tools with the grains perpendicular to the rake or flank face, the friction generated during machining would be parallel to the grain direction, which led to the rapid peeling on the tool surface along the moving direction of the workpiece or the chip flow direction, resulting in rapid tool wear. The preferred orientation of mechanical properties designed by engineering grain orientation provides the possibility to optimize the cutting performance of SiAlON ceramic tool in turning superalloys.     

芳纶纤维复合材料切削性能与刀具选用

针对芳纶纤维复合材料的性能,进行了相应的车削、铣削和钻削基础工艺试验。结果表明,该材料呈现出切削力大、切削热不易散发、切削刀具磨损剧烈、树脂基材料影响切削性能、加工缺陷多,质量不稳定等切削性能;提出了相应切削刀具材料的选用原则,即应采用高硬耐磨的硬质合金或金刚石刀具材料进行切削;提出了车削、铣削、钻削加工该复合材料的刀具应具备的结构形式和几何参数。