淬火温度对30Cr15Mo1N高氮轴承钢组织和性能的影响

doi:10.13228/j.boyuan.issn0449-749x.20170070

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Abstract The effect of austenitizing temperature on the microstructure and mechanical properties of high nitrogen bearing steel 30Cr15Mo1N was investigated by means of optical microscope， scanning electron microscope， Thermo-Calc calculation， hardness and impact energy measurements. The results show that with the increment of austenitizing temperature， precipitates （M23C6 and M2N） in the steel gradually dissolve and the distribution of elements in the matrix tends to be uniform. There is no significant difference in the prior austenite grain size when the austenitizing temperature is lower than 1 050 ℃. However， when the samples are austenitized at higher temperatures， the austenite grains grow up sharply. The hardness of 30Cr15Mo1N increases with the increment of austenitizing temperature， then decreases when the temperature is above 1 000 ℃. The hardness of the steel is remarkably improved after subzero treatmentand does not decline significantly with the increment of austenitizing temperature. The impact toughness of 30Cr15Mo1N is the best when austenitizing at 900 ℃， and it is greatly reduced after austenitizing at 1 000 and 1 100 ℃.

Key words： austenitizing temperature high nitrogen bearing steel microstructure hardness impact energy

Received: 17 February 2017 Published: 07 September 2017

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	Articles by authors
	FENG Gao
	JIANG Zhou-Hua
	LI Hua-Bing
	HAN Yu
	LUO Yi
	DING Wei

Cite this article:

FENG Gao,JIANG Zhou-Hua,LI Hua-Bing等. Influence of austenitizing temperature on microstructure and mechanical properties of high nitrogen bearing steel 30Cr15Mo1N[J]. Iron and Steel, 2017, 52(9): 92-98.

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20170070 OR http://www.chinamet.cn/Jweb_gt/EN/Y2017/V52/I9/92

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