Wear performance of cermet cutting tools when cutting difficult materials (3)
A comparison of the wear curves of a ferritic cutter for cutting stainless steel and a YG8 cemented carbide cutter for 1Cr18Ni9Ti stainless steel is shown in Fig. 3. It can be seen from the figure that the cutting performance of the cermet tool is better than that of the YG8 cemented carbide tool, and its service life is more than three times that of the YG8 tool. This is mainly due to the excellent comprehensive mechanical properties, thermal conductivity and anti-blocking properties of the cermet material. Good physical properties [6]. The surface quality of workpieces machined with cermet tools is also superior to YG8 tools. Therefore, it can be seen that the cermet tool is more suitable for semi-finishing and finishing of stainless steel. Previous page Led Smd Strip Light,Led Smart Strip Light,Led Flexible Strip Light,Rgb Led Smart Strip Light Shenzhen Huangtai Photoelectric Co.,Ltd. , https://www.huangtailed.com
When processing stainless steel materials, in order to ensure smooth cutting and obtain high tool life and workpiece surface quality, the following points should be noted: 1 The larger rake angle and smaller lead angle should be used to reduce the cutting force. The cutting is more brisk; 2 the front and back of the tool should be carefully ground to obtain a higher surface finish to avoid bonding with the workpiece during cutting; 3 use higher cutting speed or very low cutting speed; 4 stainless steel chip The toughness is strong, so corresponding effective measures should be taken for chip breaking, coiling and chip removal; 5 stainless steel material has poor thermal conductivity and large coefficient of linear expansion, and it is easy to produce thermal deformation under the action of local high temperature in the cutting area, which is easy to finish. Influencing the dimensional accuracy, it is therefore necessary to use a tool with better thermal conductivity; 6 should try to improve the rigidity of the machine tool-tool process system.
4 Conclusion <br> <br> due to lower bending strength and fatigue strength of the cermet tool, chilled cast iron at cutting force and cutting force fluctuations, thus to lower the tool life and chipping multiple micro The form of collapse has failed. The life of YG8 cemented carbide tools is relatively high.
Due to the excellent comprehensive mechanical properties and physical properties of cermet cutters, the tool life of cutting 1Cr18Ni9Ti stainless steel is much higher than that of YG8 carbide tools.