Alternative TitleEffect of Quenching Temperature on Cryogenic Mechanical Properties of a 7Ni Steel
曹宏玮1; 罗兴宏2; 刘实2
Source Publication材料研究学报
Other AbstractThe effect of quenching temperature on cryogenic strength and toughness of a 7 Ni steel was investigated. The microstructure and volume fraction of reversed austenite were characterized by means of OM, SEM, TEM, XRD. Results show that cryogenic toughness of the steel sharply decreased when quenching temperature increased from 830℃ to 930℃. And cryogenic tensile strength as well as yield strength were obviously decreased with increasing quenching temperature. What's more, elongation also decreased at higher quenching temperature, and has a consistent variation tendency with cryogenic strength. Grains of prior austenite and martensite packets were fine in the steel quenched at 830℃, but grains and packets grew significantly at higher quenching temperature. Cryogenic strength and toughness decreased with growth of grain sizes and packet width. Coarsen microstructure has a adverse effect on cryogenic strength and toughness. The amount of reversed austenite showed downtrend basically by increasing quenching temperature. The steel quenched at 830℃ has a maximum of reversed austenite amount and impact energy.
Keyword金属材料 7Ni钢 淬火温度 低温力学性能 微观组织 逆转奥氏体
Indexed ByCSCD
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Cited Times:4[CSCD]   [CSCD Record]
Document Type期刊论文
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GB/T 7714
曹宏玮,罗兴宏,刘实. 淬火温度对7Ni钢低温力学性能的影响[J]. 材料研究学报,2018,32.0(005):388-394.
APA 曹宏玮,罗兴宏,&刘实.(2018).淬火温度对7Ni钢低温力学性能的影响.材料研究学报,32.0(005),388-394.
MLA 曹宏玮,et al."淬火温度对7Ni钢低温力学性能的影响".材料研究学报 32.0.005(2018):388-394.
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