Knowledge of blade’s common materials

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Knowledge of blade’s common materials

:yinglong :2017-12-27 10:05:32

TC is the cemented carbide, because the main component of carbide is tungsten carbide, cemented carbide with high hardness, wear resistance, strength and toughness is good, heat, corrosion and a series of excellent performance, especially its High hardness and abrasion resistance, even at 500 ℃ temperature is basically the same, at 1000 ℃ still have a high hardness. Carbide is widely used as a tool material, such as turning tools, cutter, planer, bit, boring tool, etc., for cutting cast iron, nonferrous metals, plastics, chemical fiber, graphite, glass, stone and ordinary steel, can also be used to cut Heat-resistant steel, stainless steel, high manganese steel, tool steel and other difficult to process materials. But the tensile strength of cemented carbide is low, the impact toughness is poor, the edge is not sharp, more difficult to process, not easy to make the shape of the more complex overall tool, so now can not completely replace the HSS.

Blade with Tungsten Carbide

High speed steel is the full name of HSS, the corresponding Chinese name is high speed steel. High-speed steel is a common tool for the manufacture of knives and molds, also known as front steel, meaning quenching【1】can be hardened even when cooled in the air and very sharp. It is a complex composition of alloy steel, is composed of tungsten, molybdenum, chromium, vanadium, cobalt and other carbide elements. Alloying elements of the total amount of about 10 to 25%. High-speed cutting produces high hardness (about 500 ℃) can still maintain high hardness, Rockwell hardness (HRC) can be more than 60, which is the most important characteristics of high-speed steel - red hardness【2】, so it is very suitable Used to make cutting tools.

Note: quenching 【1】: the workpiece after heating and heating, in water, oil or other inorganic salts, organic water and other quenching medium in the rapid cooling, quenching steel after hardening, and brittle.

Red hardness 【2】: refers to the material after a certain period of time to maintain a certain time to maintain its hardness, in high-speed steel, in order to ensure its red hardness, must be added W, Mo, Cr, V and other carbide forming elements ,

SKD11 is a Japanese tool steel grades, is a good wear resistance of the general cold work die steel, is a kind of alloy tool steel, does not belong to high-speed tool steel, the basic is also used for mold materials, heat treatment can reach HRC58- 60. It is suitable for cold extrusion, stretch film, beer stainless steel, and has good quenching property, and the quenching deformation is small, the most suitable for the precision of the mold, and has a good high temperature strength, toughness and high temperature fatigue performance, Can withstand the sudden change in temperature, suitable for long-term work at high temperatures, with excellent cutting performance and polishing performance.

Cr12MoV (international standard name, also known as D2) is a cold work die steel, is a kind of alloy tool steel, suitable for manufacturing larger cross-section, complex shape, heavy working conditions under a variety of cold mold And tools such as punching die, trimming die, piping die, steel deep drawing die, circular saw, standard tools and gauges, thread rolling and so on.

9CrSi also belongs to alloy tool steel, with brittleness and hard, as well as on the surface quenching heat sensitivity and easy to crack the tendency. 9crsi material if it can heat treatment, the use of value will be a certain increase. This material suitable crushing more brittle, the request is not very high product.

Ordinary alloy tool steel generally in the temperature of 180 ℃ -250 ℃ work, and high-speed tool steel at about 600 ℃ operating temperature, can still maintain a high hardness. I said that may not be comprehensive, high-speed tool steel is almost an upgraded version of alloy tool steel, but the alloy tool steel quenched with sufficient wear resistance, and good toughness, so I think different materials have their most suitable use, There is no absolute good or bad.