The development of a woodworking knife having self-sharpening characteristics by the application of vanadium carbide plating only on the back.

当工具被反复使用来切割木材时，切割边缘以这样的方式磨损，使得边缘的尖端变圆。本研究旨在开发一种自锐性木工刀具，这种自锐性是通过在刀具的背面涂覆非常薄的碳化钒来实现的。这种VC涂层抑制了背面的磨损，并且由于主要来自未涂层正面的渐进磨损，还保持了切削刃的锋利性。首先，对各种树种的风干木材进行了低速正交切削试验。VC涂层刀具在使用所有树种（包括含二氧化硅的Melapi）的情况下显示出与Cr-（铬）涂层刀具一样的良好自锐特性。接下来，进行高速圆周向上铣削试验。在切削Melapi的各种基体中，VC涂层刀具均表现出自锐性。在这种切割中，基材的耐磨性越小， ...更多信息 工具寿命。只有ASP 60和HAP 72是最强的粉末高速钢，它们的刀具寿命长到足以实际使用。与此相反，最脆弱的合金工具钢SKS 3、SX 105 V和SKD 61在云杉的切削中显示出具有实用性的优良自锐特性。ASP 60和HAP 72涂层刀具切削云杉时不具有自锐性。然而，它们的耐磨性显着提高VC。他们似乎也有足够的实用性，用于切割云杉。接下来，注意涂层的厚度与自锐速度的关系。测试在上述实验中显示出中等耐磨性的在SKH 51上具有VC涂层的工具。自锐涂层厚度的有效范围被认为是在10 μ m和25 μ m之间，在切割Melapi的工具与SKH 51基板。然而，在云杉的切削中，使用SKS 3基材的刀具，自锐的有效涂层厚度范围被发现在1 μ m和6 μ m之间。少

As a tool is repeatedly used to cut wood, the cutting edge abrades in such a way that the tip of the edge becomes round. This research was carried out to develop a self-sharpening woodworking tool, such self-sharpening being realized by coating the back surface of the tool with very thin VC(vanadium carbide). This VC coating restrains abrasion on the back surface, and also maintains sharpness of the cutting edge due to the progressive abrasion mainly from the uncoated face side.First, a low speed orthogonal cutting test, was carried out on the air-dried woods of various species. The VC-coated tool showed a fine self-sharpening characteristic like the Cr-(chromium)coated tool with all wood species used, including Melapi containing silica.Next, a high speed peripheral up-milling test was carried out. With all kinds of substrates used in cutting Melapi, VC-coated tools showed the self-sharpening characteristic. In such cutting, the smaller the abrasion-resistant of the substrate, the shor … More ter-was the tool life. The only substrates which showed tool life long enough to be of practical use were ASP60 and HAP72 of the most powerful powder high speed steel. On the contrary, SKS3, SX105V, and SKD61 of the most fragile alloy tool steel showed a fine self-sharpening characteristic that was of practical use, in cutting of Spruce. Furthermore, the coated tools of ASP60 and HAP72 did not show the self-sharpening characteristic in cutting of Spruce. However, their abrasion resistances were considerably improved by VC. They also seemed to have sufficient practicality for use of cutting Spruce.Next, attention was given to the thickness of a coating layer in relation to the speed of self-sharpening. The tools with VC coating on SKH51 that showed intermediate abrasion resistance in the above experiment were tested. The effective range of coating thickness for self-sharpening was found to be between 10 mum and 25 mum in cutting Melapi by the tool with SKH51 substrate. However in the cutting of Spruce using the tool with SKS3 substrate, the effective range of coating thickness for self-sharpening, was found to be between 1 mum and 6 mum. Less