2013•Modern MachineryRequires access

Study on Mechanical Properties of the GDL-7 Steel

Liang Yilon

Abstract

The mechanical properties of the GDL-7 steel after quenching and series of tempering at 830 ℃ have been studied.The results show that the rockwell hardness of this material gradually decreased with the increase of tempering temperature after quenching and series of tempering at 830 ℃.Yield strength and tensile strength gradually reduce with the increase of the tempering temperature,and it appears the irreversible temper brittleness and the second temper brittleness when tempering temperature is 350 ℃ and 500 ℃,respectively.

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Key concepts: Tempering, Rockwell scale, Brittleness, Quenching (fluorescence), Ultimate tensile strength, Materials science, Metallurgy, Composite material