%0 Journal Article
%T 冷却速率对轴承钢GCr15组织和性能的影响<br>Effect of Cooling Rate on Microstructures and Properties of GCr15 Bearing Steel
%A 王银国
%A 孙福猛
%A 董凤奎
%A 何健楠
%A 李祥龙
%A 李世晶
%J Metallurgical Engineering
%P 99-105
%@ 2373-1486
%D 2016
%I Hans Publishing
%R 10.12677/MEng.2016.32015
%X <div style=\"text-align:justify;\">
	<span style=\"line-height:1.5;\">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。<br />
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.</span><span style=\"line-height:1.5;\"></span> 
</div>
%K 轴承钢GCr15，CCT曲线，冷却工艺，网状碳化物<br>Bear Steel GCr15
%K CCT Curve
%K Cooling Process
%K Net Carbide
%U http://www.hanspub.org/journal/PaperInformation.aspx?PaperID=17939