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 ℃.
冯 浩，姜周华，李花兵，韩 宇，罗 毅，丁 伟. 淬火温度对30Cr15Mo1N高氮轴承钢组织和性能的影响[J]. 钢铁, 2017, 52(9): 92-98.
FENG Hao，JIANG Zhou-hua，LI Hua-bing，HAN Yu，LUO Yi，DING Wei. Influence of austenitizing temperature on microstructure and mechanical properties of high nitrogen bearing steel 30Cr15Mo1N. Iron and Steel, 2017, 52(9): 92-98.
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2017, Vol. 52 
