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Properties of low-alloy high-speed steel at elevated temperature

J. Jaworski ; Faculty of Mechanical Engineering and Aeronautics, Rzeszow University of Technology, Rzeszów, Poland
T. Trzepieciński ; Faculty of Mechanical Engineering and Aeronautics, Rzeszow University of Technology, Rzeszów, Poland


Puni tekst: engleski pdf 228 Kb

str. 75-78

preuzimanja: 961

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Sažetak

This paper presents the results of research on the determination of the coefficient of thermal conductivity and hot hardness of cutters made of selected grades of low-alloy high-speed steels, HS 6-5-2 and HS3-1-2. The investigations of hot hardness and yield stress values of HS6-5-2 steel at elevated temperatures have shown that the hot hardness value decreased to 650 – 700 HV (59 – 60 HRC) in the temperature range of 500 – 550 °C. However, the hardness of the samples preheated to the temperature of 500 – 550 °C and measured at room temperature does not change. A decrease of the hot hardness of the steel is correlated with decreasing yield stress at elevated temperature.

Ključne riječi

low-alloy steel; high-speed steel; temperature; hardness; thermal conductivity

Hrčak ID:

168888

URI

https://hrcak.srce.hr/168888

Datum izdavanja:

2.1.2017.

Posjeta: 1.448 *