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CVD Diamond Coating Technology and Application

About Diamond Coated Cutting Tools

CVD coating reactor

CVD diamond coated cutting tools

In the realm of metalworking, graphite and carbon fiber composite materials (CFRP) pose a formidable challenge due to their high hardness and abrasive nature, which can rapidly wear down cutting tools. Often, completing machining on a single workpiece becomes unfeasible without frequent tool changes, hindering unattended production and escalating production costs due to tool consumption, machine downtime, and increased labor expenses.

However, the advent of diamond tools has revolutionized the processing of these tough materials. Renowned for their exceptional hardness and wear resistance, diamond tools have emerged as the go-to solution for machining high-hardness and abrasive substrates. Over the past decades, advancements in technology have propelled the evolution of diamond tool production, making it more sophisticated and cost-effective.

One notable innovation in this domain is Chemical Vapor Deposition (CVD), a process wherein diamond is grown on substrates, typically tungsten cobalt carbide, through chemical vapor deposition. The CVD method demands stringent requirements regarding matrix composition and tool edge geometry, as not all cemented carbides can successfully support a qualified diamond coating.

In the nascent stages of CVD pure diamond coating technology, challenges such as unstable coating quality and exorbitant costs impeded widespread adoption. However, relentless technological advancements have spurred rapid development in CVD technology. Coupled with the escalating demand for graphite and carbon fiber tools and the amortization of unit costs, leading tool manufacturers have successfully introduced CVD pure diamond-coated tools with stable quality and acceptable costs into the market, facilitating efficient machining of these demanding materials.

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