金属切削刀具和工件的波段发射率标定

使用红外热像仪对切削加工中常见的工件材料碳钢和模具钢、常用的刀具材料硬质合金和涂层硬质合金在300～900 ℃进行表面发射率的标定，并考虑加热箱内环境热辐射对试样的作用，分析温度、表面结构、几何形状对试样表面发射率的影响。结果表明钢材表面发射率随温度升高而增大，但模具钢在较宽的温度范围内保持较小的表面发射率；试样表面平整性影响表面发射率；涂层刀具的表面发射率在比较宽的温度范围内一直稳定在相当低的值。

Surface Emissivity Calibration for Metal Cutting Tool and Workpiece Materials with Infrared Imager

The surface emissivities of medium carbon steel and die/mold steel, common carbide and coated carbide are calibrated with an infrared imager within the temperature range of 300～900℃. The heat radiation influence of the heating stove environment on the specimens is considered, and the effects of temperature, surface structure and geometry of the specimens on their surface emissivity are analyzed. The investigation results indicate: with the increase of temperature, the emissivities of these steels increase, but the die/mold steel keeps a small emissivity within a relatively wide temperature range; the sample surface evenness influences the surface emissivity; the coated tool keeps a stable and quite small surface emissivity.