high speed steel composition forged high speed steel composition supplier

high speed steel composition forged high speed steel composition supplier

High-speed steel (HSS) is a tool steel with high hardness, high wear resistance
and high heat resistance, also known as high-speed tool steel or front steel,
commonly known as white steel. High-speed steel was created in 1898 by F.W.
Taylor and M. White in the United States.
High-speed steel has good process performance, good strength and toughness, so
it is mainly used to manufacture complex thin-edged and impact-resistant metal
cutting tools, as well as high-temperature bearings and cold extrusion dies. In
addition to the high-speed steel produced by the smelting method, powder
metallurgy high-speed steel appeared after the 1960s, which has the advantage
of avoiding the reduction of mechanical properties and heat treatment
deformation caused by the segregation of carbides produced by the smelting
method.

Craftsmanship
The heat treatment process of high-speed steel is more complicated, and it must
go through a series of processes such as quenching and tempering. Quenching is
generally carried out in two stages due to its poor thermal conductivity. First
preheat at 800 ~ 850 ℃ (to avoid causing large thermal stress), then quickly
heat to the quenching temperature of 1190 ~ 1290 ℃ (the actual temperature of
different brands is different), and then oil cooling or air cooling or gas
cooling. The factories are all heated by salt furnaces, and vacuum furnaces are
also widely used. After quenching, a part (about 30%) of retained austenite
remains in the internal structure and is not transformed into martensite, which
affects the performance of high-speed steel. In order to transform the retained
austenite and further improve the hardness and wear resistance, it is generally
necessary to carry out 2 to 3 tempering times, the tempering temperature is 560
° C, and the temperature is kept for 1 hour each time.
Production method: Usually electric furnace is used for production, and powder
metallurgy method was used to produce high-speed steel, so that the carbides
are evenly distributed on the substrate in the form of extremely fine
particles, which improves the service life.
Uses: used to manufacture various cutting tools. Such as turning tools, drills,
hob, machine saw blades and molds with high requirements.

Songshun specialized in Special Steel for almost 20 years. We can supply mold
steel, high speed steel, alloy steel, free cutting steel and etc.Welcome your
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