切削奥氏体不锈钢的涂层刀具磨损机理探讨

通过不锈钢0Cr18Ni9切削加工的刀具寿命试验,探讨涂层刀具的磨损形态和机理,提出涂层刀具切削奥氏体不锈钢时刀具的磨损形态主要为边界磨损的观点,并验证了YBG202涂层刀具适合切削奥氏体不锈钢。     

奥氏体不锈钢钻头用高速钢的选择

正1引言奥氏体不锈钢应用广泛,其特点是韧性好、导热系数小、加工硬化显著、切削力大、切削温度高和磨损大,是一种典型的难加工材料。普通奥氏体不锈钢钻通常选用M35、M42等钴高速钢制造。本文通过试验研究M35和M42钢的选用情况,分析得出更适合用作不锈钢钻头的材料。     

奥氏体不锈钢轴承座的机械加工分析

本文分析了奥氏体不锈钢轴承座的加工难点，论述了该件的主要机加工艺和各道工序的装夹方法、切削参数以及必备的专用工装。     

基于工艺试验的零件加工硬化现象优化

针对某项目中Z6CNT18-10奥氏体不锈钢在生产中出现的加工硬化现象,采用合理的切削加工参数对奥氏体不锈钢进行切削试验。经实际加工验证,解决了不锈钢加工硬化影响及刀具磨损问题,零件加工质量及效率得以明显提升,具有极好的应用推广价值。     

基于AdvantEdge的不锈钢攻丝过程切削参数优化

基于AdvantEdge仿真软件,对攻丝过程进行模拟计算分析,获取不同切削参数下三类丝锥攻制316L奥氏体不锈钢时的最大扭矩值、最大轴向力及最高刀尖温度,并通过316L不锈钢攻丝扭矩试验,验证数值模拟过程中切削模型的可靠性,对试验结果进行对比分析,得出316L奥氏体不锈钢螺纹孔加工时的最优切削参数,并分析不同结构丝锥加工特性,为切削参数优化选择提供参考依据。     

涂层硬质合金刀具车削奥氏体不锈钢的试验研究

对奥氏体不锈钢1Cr18Ni9Ti的切削力、切削工件的表面完整性进行了实验分析,并应用PVD、CVD两种涂层刀具针对奥氏体不锈钢典型的车削加工工况进行了深入的试验研究。     

涂层高速钢钻头钻削奥氏体不锈钢的切削性能研究

从不锈钢材料的应用和切削加工现状出发，针对奥氏体不锈钢1Cr18Ni9Ti的切削加工性能进行了试验分析，通过用TiAlN涂层和TiN涂层高速钢钻头进行钻削对比实验，研究了钻削速度对切削力、扭矩、切削温度，刀具磨损的影响，并获得了能够保证对该材料进行高效高精度钻削的合理工艺参数。     

奥氏体不锈钢平面铣削切削力和表面粗糙度试验研究

应用均匀试验设计方法,在较宽切削速度范围内,对1Cr18Ni9Ti奥氏体不锈钢进行平面铣削试验研究。通过指数回归和二次多项式回归分别建立了切削力和表面粗糙度经验公式,采用分层多目标优化方法获得了M20硬质合金刀具切削1Cr18Ni9Ti奥氏体不锈钢时的优化切削参数。试验结果表明,本文采用的试验设计方案和建立的切削力和表面粗糙度经验公式是合理可行的。     

奥氏体不锈钢的超声振动切削研究

通过正交试验研究了超声振动切削不锈钢材料（1Cr18Ni19Ti）时切削用量和刀具材料对刀具寿命的影响，并与普通切削进行了对比试验，阐明了不锈钢加工采用超声振动切削的优越性，给出了合理的切削用量和合适的刀具材料。     

用高速钢刀具车削不锈钢

在车削加工不锈钢材料时，尤其是奥氏体不锈钢(1Cr18Ni9Ti)(以下统称不锈钢)，切削力大，切削温度高，不易断屑，表面硬化现象严重，切削性能差。由于硬质合金刀具不能刃磨得非常锋利，切削速度又不能过低。在有些情况下，例如用硬质合金刀具切断，车螺纹等切削比较困难。我在实际操作中摸索认识到，不锈钢材料虽然切削性能较差，但其材料的硬度不高(200HB左右)。利用普通高速钢刀具可刃磨得非常锋利这一特点，用锋利的高速钢刀具在较低的切削速度下切削很轻快，表面硬化现象也很轻，加工过程与加工普通中碳钢差不多。     

OPTIMIZATION STUDIES ON HOLE-MAKING TOOLS FOR HIGH-PERFORMANCE CUTTING AUSTENITIC STAINLESS STEEL

Austenitic stainless steel is a kind of difficult-to-cut material utilized widely in various industry fields. Hole-making tools are the uppermost obstacle of high performance cutting, so the optimizations of tools are imperative. This paper presents respectively the optimal geometrical characteristics and corresponding coating for high performance cutting austenitic stainless steel. The appreciated cutting performance of optimized tools with optimized cutting parameters has also been evaluated completely through experiments. Optimized special drills with point angle 138° and helix angle 38° was decided and TiCN coating was selected as the best coating. However optimized taps had different geometry structures for tapping through holes and blind holes. The former adopted the spiral pointed tap with inclination angle 15 °. The latter was spiral fluted tap with helix angle 34°. In high-performance cutting austenitic stainless steel, the optimized cutting parameters of special drills are 16 m/min and 0.13 mm/rev. The research results will be of great benefit for the development and application of high efficient and precise drills and taps of high performance cutting austenitic stainless steel.     

OPTIMIZATION STUDIES ON HOLE-MAKING TOOLS FOR HIGH-PERFORMANCE CUTTING AUSTENITIC STAINLESS STEEL

Austenitic stainless steel is a kind of difficult-to-cut material utilized widely in various industry fields. Hole-making tools are the uppermost obstacle of high performance cutting, so the optimizations of tools are imperative. This paper presents respectively the optimal geometrical characteristics and corresponding coating for high performance cutting austenitic stainless steel. The appreciated cutting performance of optimized tools with optimized cutting parameters has also been evaluated completely through experiments. Optimized special drills with point angle 138° and helix angle 38° was decided and TiCN coating was selected as the best coating. However optimized taps had different geometry structures for tapping through holes and blind holes. The former adopted the spiral pointed tap with inclination angle 15 °. The latter was spiral fluted tap with helix angle 34°. In high-performance cutting austenitic stainless steel, the optimized cutting parameters of special drills are 16 m/min and 0.13 mm/rev. The research results will be of great benefit for the development and application of high efficient and precise drills and taps of high performance cutting austenitic stainless steel.     

摆线铣削奥氏体不锈钢试验研究

作为难加工材料,奥氏体不锈钢机械加工性能较差,为了提高其加工效率,本文采用两种来自不同厂家的铣刀,基于往复式斜坡切入铣削方式、普通直槽铣削方式和摆线铣削方式对奥氏体不锈钢进行试验研究,结果表明:在考察的三种铣削方式中,摆线铣削方式能有效提高奥氏体不锈钢的加工效率。     

Prediction of surface roughness and cutting zone temperature in dry turning processes of AISI304 stainless steel using ANFIS with PSO learning

This paper presents an approach for modeling and prediction of both surface roughness and cutting zone temperature in turning of AISI304 austenitic stainless steel using multi-layer coated (TiCN?+?TiC?+?TiCN?+?TiN) tungsten carbide tools. The proposed approach is based on an adaptive neuro-fuzzy inference system (ANFIS) with particle swarm optimization (PSO) learning. AISI304 stainless steel bars are machined at different cutting speeds and feedrates without cutting fluid while depth of cut is kept constant. ANFIS for prediction of surface roughness and cutting zone temperature has been trained using cutting speed, feedrate, and cutting force data obtained during experiments. ANFIS architecture consisting of 12 fuzzy rules has three inputs and two outputs. Gaussian membership function is used during the training process of the ANFIS. The surface roughness and cutting zone temperature values predicted by the PSO-based ANFIS model are compared with the measured values derived from testing data set. Testing results indicate that the predicted surface roughness and cutting zone temperature are in good agreement with measured roughness and temperature.     

核电产品奥氏体不锈钢材料磁导率控制工艺

核电产品中的奥氏体不锈钢材料对磁导率有严格要求(磁导率μ≤1.3),而按国标采购是因化学成份的差异会导致每批次材料磁导率不同,同时在产品生产、加工、转运、焊接过程中也会造成磁导率变化,满足不了产品使用要求.通过对核电产品常用奥氏体型不锈钢材料结构和组织分析,从微观原理、组织状态、化学成分对磁导率的影响等多方面进行分析,其中化学成分对磁导率的影响最大,因此通过化学成分的调节,使材料获得稳定奥氏体组织和采用稳定有效的工艺措施是保证产品磁导率合格的关键.     

基于应变强化技术的奥氏体不锈钢压力容器轻型化设计探讨

奥氏体不锈钢材料韧性好但屈服强度低,通过应变强化技术可显著提高奥氏体不锈钢的屈服强度,从而提高奥氏体不锈钢压力容器的承载能力,减薄容器壁厚,达到节约材料的目的。介绍了奥氏体不锈钢应变强化的基本原理和基本过程,从强度、抗腐蚀能力、应力腐蚀开裂和氢脆等方面综述了奥氏体不锈钢应变强化后性能变化的研究进展,并提出进一步研究的建议,以实现压力容器轻型化这一安全与经济并重的绿色制造理念。     

WC-Ni3Al硬质合金切削奥氏体不锈钢的切削力及磨损研究

采用正交试验法对WC-Ni3Al硬质合金刀具切削奥氏体不锈钢过程中的切削力及磨损性能进行研究,并对切削深度、进给量以及切削速度对切削力的影响进行分析。利用指数回归分析建立主切削力的经验公式,结合切削用量显著性分析对主切削力进行了对比分析。试验表明:切削深度对切削力的影响最大;与WC-Co硬质合金相比,WC-Ni3Al硬质合金刀具的切削力以及后刀面磨损均优于WC-Co刀具。