China's superhard cutting tools are applied in three major areas, driving significant economic growth.
Summary: After years of research and exploration, China has made significant progress in the field of superhard cutting tools. However, their application in manufacturing remains relatively limited so far. The use of superhard tools for hard turning—a technology that has been developed and widely adopted over the past decade—has already yielded substantial economic and societal benefits. It’s reported that China’s production of superhard tools is primarily applied in three key areas: In the roll-processing industry, many large domestic roll manufacturers have successfully integrated superhard tools into their processes, using them for roughing, semi-finishing, and finishing operations on various types of rolls, including cold-hardened cast iron and quenched steel. These applications have consistently delivered excellent results.
Category: Company News
Release date: 2021-05-19
After years of research and exploration, China has made significant progress in the field of superhard cutting tools. However, their application in manufacturing remains relatively limited so far. The use of superhard tools for hard turning—a technology that has been developed and widely adopted over the past decade—has already yielded substantial economic and societal benefits. It’s reported that superhard tool production in China is primarily applied across three key industries: In the roll-processing sector, many large domestic roll manufacturers have successfully integrated superhard tools into their processes, using them for roughing, semi-finishing, and finishing operations on cold-hardened cast iron, quenched steel, and other types of rolls. These applications have consistently delivered excellent results.
Roller Manufacturing Industry
Many large domestic roll manufacturing enterprises have already adopted ultra-hard cutting tools to perform roughing, semi-finishing, and finishing operations on various types of rolls, including chilled cast iron and quenched steel—achieving remarkable results. On average, these tools have boosted machining efficiency by 2 to 6 times, while simultaneously reducing machining time and energy consumption by 50% to 80%. For instance, the Roll Factory at Wuhan Iron & Steel Company reported significant improvements when using these advanced tools: during roughing and semi-finishing operations on chilled cast iron rolls with a hardness ranging from HS60 to 80, cutting speeds were increased threefold. As a result, producing just one roll now saves more than 400 yuan in electricity and labor costs, along with nearly 100 yuan in tool expenses—leading to substantial economic benefits. Another example comes from our own facility, where FD22 metal-ceramic tools were successfully employed to turn HRC58–63 86CrMoV7 quenched steel rolls. Under optimal cutting conditions—Vc = 60 m/min, f = 0.2 mm/r, and ap = 0.8 mm—the tools maintained continuous cutting performance over an impressive 15,000 meters of roll surface (with the maximum flank wear width VBmax reaching 0.2 mm), fully meeting the requirements for replacing grinding with turning.
Industrial Pump Manufacturing Industry
Currently, 70% to 80% of domestic slurry pump manufacturers have adopted ultra-hard cutting tools. Slurry pumps are widely used in industries such as mining and power generation, making them products in high demand both domestically and internationally. Their casing and wear plates are made from Cr15Mo3 high-hardness cast iron components, with a hardness ranging from HRC63 to HRC67. Previously, machining this material was challenging due to the limitations of conventional cutting tools, forcing manufacturers to first soften the material through annealing for roughing, followed by quenching for finishing. However, with the introduction of ultra-hard cutting tools, it’s now possible to achieve one-step hardening directly—eliminating the need for the two-step process of annealing and subsequent quenching. This breakthrough has significantly reduced both labor hours and energy consumption.
Automotive Manufacturing Industry
In industries such as automotive and tractor manufacturing, machining challenges frequently arise when working with hardened components—like crankshafts, camshafts, and drive shafts—as well as in the production of cutting tools, measuring instruments, and equipment maintenance. For instance, a locomotive and rolling stock factory in China faced difficulties while repairing equipment: they needed to machine the inner race of a bearing. The inner race, made from GCr15 steel with a hardness of HRC60 and an inner diameter of φ285 mm, traditionally required 2 hours to be ground due to uneven material removal. However, by switching to an ultra-hard cutting tool, the same operation was completed in just 45 minutes.
Keywords: China's superhard cutting tools are applied in three major areas, driving significant economic growth.
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