冶金工程  >> Vol. 3 No. 2 (June 2016)

冷却速率对轴承钢GCr15组织和性能的影响
Effect of Cooling Rate on Microstructures and Properties of GCr15 Bearing Steel

DOI: 10.12677/MEng.2016.32015, PDF, HTML, XML, 下载: 1,583  浏览: 3,574 

作者: 王银国, 董凤奎, 何健楠:宝钢特钢韶关有限公司,广东 韶关;孙福猛, 李祥龙, 李世晶:宝钢集团广东韶关钢铁有限公司,广东 韶关

关键词: 轴承钢GCr15CCT曲线冷却工艺网状碳化物Bear Steel GCr15 CCT Curve Cooling Process Net Carbide

摘要: 本文采用光学显微镜、显微硬度等分析手段对某钢厂生产的GCr15轴承钢在不同冷却速度下的奥氏体相变规律进行了研究。结果表明:发生珠光体相变的临界冷却速度约为3℃/s,当温度降至约200℃时,发生马氏体转变。冷却速度小于5℃/s时,会产生较严重的网状碳化物,随冷却速度的提高,网状碳化物析出减少,珠光体相变温度降低。
Abstract: The Austenite phase transformation law of GCr15 bearing steel with different processes is studied by means of optical microscope and hardness tester. The experimental results show that: the critical cooling rate of pearlite phase transformation is about 3˚C/s and the Martensite transfor-mation starts when the temperature drops at about 200˚C. There will be a serious precipitation of net carbide when the cooling rate is less than 5˚C/s, and with the increase of cooling rate, the pearlite phase transformation temperature becomes lower and the precipitation of net carbide decreases.

文章引用: 王银国, 孙福猛, 董凤奎, 何健楠, 李祥龙, 李世晶. 冷却速率对轴承钢GCr15组织和性能的影响[J]. 冶金工程, 2016, 3(2): 99-105. http://dx.doi.org/10.12677/MEng.2016.32015