Effect of tempering on hardness of forged 1Cr17Ni2 stainless steel

doi:10.13251/j.issn.0254-6051.2020.01.022

Abstract

Abstract: The effect of tempering temperature, tempering time,tempering times and cooling mode on the tempering hardness of forged 1Cr17Ni2 stainless steel was studied by orthogonal test. The results show that when the tempering temperature range is 630-730 ℃, the tempering time range is 120-360 min, the number of tempering times is 1-3, and the cooling methods are air cooling, stack cooling and sand cooling respectively, the influence order on the hardness of the steel is times of tempering> tempering temperature> tempering time> cooling mode, and the tempering hardness of the steel decreases gradually with the increase of tempering times, though other parameters have no positive correlation with the hardness.When tempered one time at 720 ℃ for 240 min, or at 680 ℃ for 720 min, followed by air cooling, the tempering hardness of the steel is always higher than 3.5 HBS.When tempered for three times and all at 680 ℃ for 180-210 min then air cooled, the hardness of the steel can decrease to 3.6 HBS or lower.

Key words: 1Cr17Ni2 stainless steel, times of tempering, hardness, retained austenite

CLC Number:

TG161

Peng Qianzhi, Zuo Huafu, Li Jianjun, Piao Xuehua, Yu Sanshan, Zhang Qiang. Effect of tempering on hardness of forged 1Cr17Ni2 stainless steel[J]. HTM, 2020, 45(1): 112-116.

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