Effect of quenching temperature on mechanical properties  of ø16 mm 35Si2Cr steel bar

doi:10.13251/j.issn.0254-6051.2023.12.024

Abstract

Abstract: Microstructure, Vickers hardness of 35Si2Cr hot-rolled steel quenched at 930, 950, 970, 990 and 1010 ℃ and tensile properties, impact properties tempered at 460 ℃ were investigated. The results show that there is decreasing ferrite content in the core area of all the quenched microstructure when the temperature increases from 930 ℃ to 1010 ℃, and the quenched Vickers hardness is fluctuated from depth of 6 mm to the core due to the non-uniformity of the microstructure. The 1010 ℃ quenched Vickers hardness from edge to 1/2 radius is the highest, which shows the higher quenching temperature is good for austenite homogenization. There is no change of tensile properties quenched at 930-1010 ℃ and tempered at 460 ℃, and the best impact properties can be obtained when quenched at 1010 ℃ and tempered at 460 ℃. When the quenching temperature is 1010 ℃, 35Si2Cr steel has better comprehensive mechanical properties.

Key words: 35Si2Cr steel, ferrite, quenching temperature, impact properties

CLC Number:

TG156

Zhao Haifeng, Yu Haoyong, Tan Zhenyu. Effect of quenching temperature on mechanical properties of ø16 mm 35Si2Cr steel bar[J]. Heat Treatment of Metals, 2023, 48(12): 144-147.

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Effect of quenching temperature on mechanical properties of ø16 mm 35Si2Cr steel bar

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