作　　者： ; ; ; ;

机构地区： 山东大学机械工程学院

出　　处： 《华南理工大学学报（自然科学版）》 2010年第8期83-88,共6页

摘　　要： 采用涂层硬质合金刀具进行了粉末冶金镍基高温合金的铣削刀具磨损试验，并运用扫描电镜和能谱分析技术分析了刀具的磨、破损形态和磨损机理．采用多因素正交试验对粉末冶金镍基高温合金的铣削力、刀具寿命进行研究，使用最小二乘法等方法和回归分析建立了铣削力、刀具寿命的经验模型．利用等寿命一效率响应曲面法，对干铣粉末冶金镍基高温合金的切削参数进行了优化．结果表明：粘结磨损和磨粒磨损是主要的磨损机理；在不同的切削速度下刀具失效形式不同；建立的铣削力及刀具寿命经验模型高度显著，进给量对铣削力和刀具寿命的影响显著；干铣加工粉末冶金镍基高温合金理想的切削用量为切削速度40～60m／min、轴向切削深度0．15～0．20mm、径向切削深度10～20mm、每齿进给量0．08～0．10mm． Milling experiments of nickel-based powder metallurgy superalloy using coated carbide tools were conducted to investigate the wear resistance of the tools, and the corresponding wear morphologies and mechanisms were analyzed by means of SEM and EDS. Then, the milling force and tool life were investigated by multi-factor orthogonal tests, and the corresponding empirical models were established by means of the least squares method and the regression analysis. Finally, the cutting parameters of coated carbide tools for the dry milling of nickel-based powder metallurgy superalloy were optimized based on the tool life-efficiency response surface methodology. The experimental results show that （ 1 ） the wear of the coated carbide tools is mainly abrasive and adhesive ; （2） the failure form of the tools varies with the cutting speed ; （3） the established models of milling force and tool life are highly significant in terms of the effect of the feed ; and （4） the optimal dry milling conditions are as follows ： a cutting speed of 40 -60m/min, a cutting depth of 0. 15 -0. 20mm, a radial cutting depth of 10 -20mm, and a feed of 0.08 - 0. 10 mm per tool.

关 键 词： 镍基粉末冶金 高温合金 涂层硬质合金 刀具 刀具磨损 刀具寿命 铣削力 切削效率

领　　域： [金属学及工艺]