Sintered carbide tools
16 3月 2018 | 没有评论 | posted by admin | in Article
The carbonized cutting tool is a powder metallurgy product. The main component of the tungsten carbide cutting tool is 50%~90% tungsten, and titanium, molybdenum, niobium, etc. are used as the binding agent for the cobalt powder, which is then heated and sintered. Carbonized cutters are harder than any other material, and they are three times harder than high carbon steels. They are suitable for cutting hard metals or stone materials. Because they are hard and brittle, they can only be made into sheets and then welded to be more flexible. On the tool shank, when such a blade is dulled or cracked, another blade or a new blade can be replaced. This enough tool is called a discarded turning tool.
Dry cutting technology
13 3月 2018 | 没有评论 | posted by admin | in Article
Dry-cutting technology is proposed with the development of ceramic cutting tools. With regard to environmental protection considerations, no cutting fluid is used. The auxiliary heating device is used to locally heat the surface of the workpiece (such as laser heating, conductive heating, etc.) to a certain temperature to improve the material. The machinability reduces the cutting force and contributes to the realization of dry cutting. However, this technology places high demands on the heat resistance (red hardness) of the tool for a long period of time. Therefore, it is currently only applicable to a ceramic tool that can maintain its strength and hardness at high temperatures for a long period of time.
Dry cutting is currently not a universal technology due to the influence of the current process conditions, workpiece materials and processing types.
TiC coating
12 3月 2018 | 没有评论 | posted by admin | in Article
TiC coating has high hardness and wear resistance, good oxidation resistance, can form titanium oxide film during cutting to reduce friction coefficient, reduce tool wear, make cutting speed increase by more than 40%, and is more suitable for high-speed cutting. The TiC coating has a high bonding temperature with the steel, the surface grains are very fine, and the built-up edge is rarely generated during cutting, which is suitable for high-speed precision turning. The disadvantage is that the coefficient of linear expansion differs greatly from that of the base body. Therefore, the coating tends to crack when high-speed turning or milling of hard materials, high-temperature alloys or workpieces with inclusions.
