Tool steel carbon steel bar

Tool Steel Bar, it is a kind of carbon steel used to make cutting tools, measuring tools, molds and wear-resistant tools of steel. Tool steel has high hardness and can maintain high hardness and red hardness at high temperatures, as well as high wear resistance and appropriate toughness.

The carbon mass fraction of carbon tool steel is higher, between 0.65 and 1.35%, and it belongs to hypoeutectoid, eutectoid or hypereutectoid steel according to its organization. After heat treatment, the surface of carbon tool steel has higher hardness and wear resistance, and the core has better toughness. Low annealing hardness (not more than HB207), good processing performance. However, its red hardness is poor, when the working temperature reaches 250 ° C, the hardness and wear resistance of the steel drop sharply, the hardness drops below HRC60, and the hardenability of this kind of steel is low. Larger tools can not be quenched (the diameter of water quench is 15mm), and the hardness of the surface hardened layer and the center part is very different when water is quenched. Make the tool easy to deform during quenching. In addition, the quenching temperature range is narrow, and the temperature should be strictly controlled during quenching. Prevent overheating, decarbonization and deformation

Product application:
Tool steel is generally divided into carbon tool Steel Plate, Steel Coil, alloy tool steel and high-speed tool steel.

Chemical content:

C	Mn	Si	P	S	Mo	Cr
0.9-1.1	0.40 max	0.8-1.2	0.025 max	0.020 max	1.8-2.2	7.5-8.5

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