作　　者： ; ; ; (田振卓）;

机构地区： 江苏大学材料科学与工程学院

出　　处： 《轧钢》 2015年第6期27-32,共6页

摘　　要： GCr15轴承钢棒材在轧制后的冷却过程中往往会有网状碳化物的形成，对轴承钢的质量和寿命产生影响。通过Gleeble3800热模拟试验机对其轧制后的控冷工艺进行模拟研究，结果表明：在860℃终轧温度下，随着冷却速率的增加，晶界处二次碳化物由网状分布逐渐变为半网状、短条状分布，珠光体球团直径明显细化，CCT曲线得到的珠光体析出温度区间主要集中在600～700℃范围内，高温终轧后，控制冷却速率和终冷温度可以达到控制网状碳化物析出并得到珠光体的目的。 In the cooling process of GCrl 5 bearing steel, a network carbide formats after hot rolling , which leads to detrimental effects on the steel＇s quality and life. Differem coolilN processes simulation was conducted by Gleeble.3800 thermal / mechanical simulator. The re- search showed that the secondary carbide in the grain boundary convered from network to half network, strip distribution and the diame- ter of pearlite nodule obviously refined with the increase of cooling rates for CK2rl5 bearing steel after high temperature deformation at 860 ℃. The precipitation temperature of pearlite obtained from CL~ curves mainly concentrated in the range of 600--700 ℃, controlling the cooling rate and fish cooling temperature can restrain the precipitation of network carbide.

关 键 词： 控制冷却 网状碳化物 冷却速率 终冷温度

领　　域： [金属学及工艺] [一般工业技术] [金属学及工艺]