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Why the circular blade is worn when cutting the circular blade
Under the normal working speed of the high-speed steel slitting circular blade and the low working speed of the carbide circular blade, the premise of cold welding can be satisfied, so the proportion of cold welding wear is large. The working temperature of the high-speed steel slitting circular blade is relatively low, and the diffusion effect between the chip and the workpiece is relatively slow, so the proportion of the diffusion wear is much smaller than that of the cemented carbide tool. Abrasive wear exists at various cutting speeds, but for low-speed cutting tools (such as broaches, wrenches, etc.), abrasives are the main cause of wear. Diffusion wear is often caused by cold weld wear and abrasive wear, and the wear rate is high. The wear and cost of the slitting blade are related to the efficiency, quality and cost of the cutting process, so it is one of the most important topics in the cutting process. The binder phase CO is reduced, which in turn reduces the bond strength of the hard phase (WC, TiC) in the cemented carbide. However, due to the alternating ability, contact fatigue, thermal stress and defects in the surface structure of the tool, the cracking of the cold welded joint may also occur on the tool side, and the particles of the tool material are carried away by the chips or the workpiece, thereby causing tool wear.
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