The coating effect on the cutting temperature has long been a hot topic in understanding heat transfer mechanism in machining coated tools, and especially the multi-layer coated tools. For multi-layer coated tools, the coating structure, coating thickness, and coating material will affect the cutting temperature of the tools. This paper is devoted to the cutting temperature in dry turning of H13 hardened steel with multi-layer coatings. New analytical models for estimating coating temperature and coating–substrate interface temperature were proposed. The multi-layer coating can be equivalent to mono-layer composite coating, which applies equivalent coating layer approach, and was developed to estimate the cutting temperature in turning by heat transfer model of mono-layer coated tool. The analyzed results were compared with appropriate experimental process data using thermocouples and FEM simulated data. The models can accurately reflect the cutting temperature of two multi-layer coated tools under the same cutting condition.

涂层对切削温度的影响长期以来一直是理解加工涂层刀具特别是多层涂层刀具传热机理的热门话题。对于多层涂层刀具，涂层结构、涂层厚度和涂层材料都会影响刀具的切削温度。本文专门研究具有多层涂层的 H13 硬化钢的干车削切削温度。提出了估计涂层温度和涂层-基材界面温度的新分析模型。多层涂层可等效为单层复合涂层，采用等效涂层方法，通过单层涂层刀具传热模型估算车削切削温度。使用热电偶和 FEM 模拟数据将分析结果与适当的实验过程数据进行比较。该模型能够准确反映两种多层涂层刀具在相同切削条件下的切削温度。