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Quantitative assessment of plastic deformation in cutting tools materials

切削刀具材料塑性变形的定量评估

基本信息

批准号：
10060628
负责人：
金额：
$ 1.18万
依托单位：
SECO TOOLS (U.K.) LIMITED
依托单位国家：
英国
项目类别：
Collaborative R&D
财政年份：
2023
资助国家：
英国
起止时间：
2023 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=10060628
关键词：
Quantitative assessment plastic deformation cutting

项目摘要

A method for quantifying the plastic deformation of cutting tool materials that is experienced during machining of high value manufactured components is needed to increase process efficiency (by at least 25%) and reduce energy use and material wastage. Its more accurate quantification would achieve these improvements by enabling better material selection for machining of complex metallic materials such as hardened steels and Nickel alloys commonly used in the aerospace manufacturing industry. It would also help accelerate the development of new tool material grades.Plastic deformation of tooling materials (WC-Co cemented carbide) causes failure of the machining tools by accelerating wear through flaking of the hard coatings applied and then erosion of the tool material itself. The mechanisms of this deformation are not understood in part because it is so difficult to quantify. External measurement of wear to the tool geometry during use gives some indication of what is happening but uncertainties in the measured wear volume are not understood and certainly have not been correlated with measurement of the plastically deformed microstructure below the surface.Development of methods of quantifying plastic deformation in the microstructure and external tool wear in three dimensions under different machining conditions would help to identify the key characteristics of the material microstructure that resist wear and thus lead to better material selection and development of new material grades with improved microstructures.

需要一种方法来量化高价值制造部件加工过程中所经历的切削刀具材料的塑性变形，以提高工艺效率（至少 25%）并减少能源使用和材料浪费。其更准确的量化将通过更好地选择复杂金属材料（例如航空航天制造行业常用的淬火钢和镍合金）的材料来实现这些改进。它还将有助于加速新刀具材料牌号的开发。刀具材料（WC-Co硬质合金）的塑性变形会通过所涂硬质涂层剥落加速磨损，然后腐蚀刀具材料本身，从而导致加工刀具失效。这种变形的机制尚不清楚，部分原因是它很难量化。在使用过程中对刀具几何形状的磨损进行外部测量可以说明正在发生的情况，但所测量的磨损量的不确定性尚不清楚，并且肯定与表面以下塑性变形微观结构的测量无关。开发在不同加工条件下量化微观结构中的塑性变形和三个维度的外部刀具磨损的方法将有助于识别抗磨损材料微观结构的关键特征从而更好地选择材料并开发具有改进微观结构的新材料牌号。