The Wc that hard alloy is bases (material of brittleness of carbonization tungsten, tall hardness) be in dispersedly Co (cobaltic, low hardness material of Gao Ren sex) medium composite material, it is one of hardness of give attention to two or morethings and the horniness material that combat flexural strength. Current cutting cutting tool uses data in, CVD is passed on the hard alloy of above (chemical coating law) PVD (physical coating law) bring to bear on can bear the Al2O3 of high speed cutting or (Ti, Al) the material of hard alloy coating of the coating such as N holds main position. The element such as grain size decided Co content and Wc the property of hard alloy. The hardness of the hard alloy with Co less content, fight compress intensity, tigidity taller, but fight concussion at the same time the cost is lower; The hardness of the hard alloy with Wc less grain, combat flexural strength taller, but its tenacity cost is lower at the same time. Exceeding atomic hard alloy is to raise hardness and the alloy material that combat flexural strength and develop at the same time, compare with common hard alloy photograph, strength is had when rigidity is same tall, the characteristic with tall hardness is had when intensity is same. The Wc grain of common hard alloy is 1, 6 μ M (μ =10-6) the left and right sides, the Wc grain that exceeds atomic hard alloy is 0. 6 μ M is controlled, because very tiny the ply of the Co part that felt effect has all round Wc grain so is thin, in the meantime, break off initiative size is small make combat flexural strength tall. Exceed atomic hard alloy to be in at first careful path broach, establish the cutting tool of integral hard alloy such as milling cutter to use, also begin to be used at recently but dislocation razor blade. But, although exceed atomic hard alloy to show exceedingly good character below microtherm, can appear easily below high temperature condition to be out of shape chronically, when cutting speed is used below high case, can produce plasticity to be out of shape sometimes, wear away increase wait for a phenomenon, give please attention. But as the advance rapidly that in last few years imperceptible WC powder makes pulverous production enterprise make relevant particle of technology and hard alloy manufacturer change a technology with alloy, size is 0.
The WC that 4 μ M controls exceeds subtle hard alloy to also appear in the market. CNC Milling
CNC Machining