Technical characteristics

Research on tungsten carbide turning with cutters equipped with high-speed steel plates R18, R12F5M and hard alloys BK8, BK60M, BK15M was carried out. Cutting tool geometry: а=10-12°, γ=15°, γ _f= 0°, φ = 45°, _φ1 = 15°. Sharpening of cutters from hard alloys was made with diamond wheel ASB, from high-speed steels - with wheel EB; after sharpening the cutters were finished on cast-iron plate with the help of boron carbide powder. The criterion of blunting is the wear on the back surface _h3 = 0,6 mm.

Firmness of cutting tools

Researches showed that durability of cutting tools does not exceed some minutes. Therefore it is more reasonable to estimate the cutting properties over the machined area. When turning with a carbide cutter made of BK60M alloy, decreasing of cutting speed from 60 to 5 m/min enables to increase the durability from 2 to 4 minutes. However, the surface area machined before the pick blunting decreases more than 5 times (from ^22-103 to ^{4-103 mm2}). Thus, the desire to increase durability leads to a very large decrease in productivity (more than in 10 times).

The peculiarity of tungsten machining

The best results have tungsten-cobalt alloys of marks ВК60М and ВК10ОМ with especially fine-grained structure which on optimum regimes allow increasing the area of processed surface in 3,5 and 2,5 times accordingly in comparison with firm alloy ВК8. The dependence of tool wear resistance on cutting modes at tungsten machining has a complex character. The greatest wear resistance is reached when working in a narrow range of cutting speeds (υ = 30-40 m/min for alloy ВК15М and υ = 45-60 m/min for alloy ВК8 and ВК60М) and feeds (s = 0,3-0,4 mm/turn).

Supplier

We offer to buy tungsten and its alloys from specialized warehouses of the supplier Evek GmbH with delivery in any city. Full compliance with modern quality requirements. Supplier Evek GmbH offers to buy tungsten and its alloys, the price is optimal in this segment of metal products.

Buy, bargain price

Supplier Evek GmbH offers refractory alloys, price - determined by the technological features of production without including additional costs. It is possible to buy products with non-standard parameters. We have the best price-quality ratio for tungsten and other heat-resistant metals. In the segment of rare and refractory metals, Evek GmbH is a profitable supplier.