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Cutting tool material selection

The material used to manufacture cutting tools must possess high hot hardness and wear resistance, necessary bending strength, impact toughness and chemical inertness, good workability (cutting, forging and heat treatment, etc.), and not be easily deformed. Generally, when the material hardness is high, the wear resistance is also high; when the bending strength is high, the impact toughness is also high.

However, the higher the material hardness, the lower its bending strength and impact toughness. High-speed steel, due to its high bending strength and impact toughness, and good machinability, remains the most widely used cutting tool material today, followed by cemented carbide. Polycrystalline cubic boron nitride is suitable for cutting high-hardness quenched steel and hard cast iron, etc.; polycrystalline diamond is suitable for cutting iron-free metals, alloys, plastics and fiberglass, etc.; carbon tool steel and alloy tool steel are only used for tools such as files, taps and dies. Cemented carbide indexable inserts have been coated with titanium carbide, titanium nitride, aluminum oxide hard layers or composite hard layers by chemical vapor deposition.

The developing physical vapor deposition method can be used not only for cemented carbide tools, but also for high-speed steel tools, such as drills, hobs, taps and milling cutters. The hard coating, as a barrier that hinders chemical diffusion and heat conduction, slows down the wear rate of the tool during cutting, and the life of the coated blade is approximately 1 to 3 times higher than that of the uncoated blade.

Knife Classification

Tools for machining various external surfaces include turning tools, planing tools, milling tools, external broaching tools, and files; tools for hole machining include drills, reamers, boring tools, reamers, and internal broaching tools;

2023

10-25

Cutting tool material selection

The material used to manufacture knives must possess high hot hardness and wear resistance, necessary bending strength, impact toughness and chemical inertness, good processability (cutting, forging and heat treatment, etc.), and not be easily deformed. Usually, when the material hardness is high, the wear resistance is also high; when the bending strength is high, the impact toughness is also high.

2023

10-25

Thread processing method

Thread processing is a process that uses tools to create threads. It employs cutting, turning, milling, grinding, and other processes to machine workpieces. It generally refers to the method of machining threads on workpieces using forming tools or abrasives. Main methods include turning, milling, tapping, die threading, grinding, polishing, and whirl cutting. When turning, milling, or grinding threads, the machine's transmission chain ensures that the cutting tool, milling cutter, or grinding wheel moves accurately and evenly along the workpiece's axial direction by one lead for each revolution of the workpiece.

2023

10-25