控冷工艺对低碳钢珠光体转变及力学性能的影响  

Influence of controlled cooling process on pearlite transformation and mechanical properties of low carbon steel

作　　者：吕长宝[1] 

机构地区：[1]河北钢铁股份有限公司唐山分公司,河北唐山063016

出　　处：《轧钢》2016年第1期15-18,共4页Steel Rolling

摘　　要：生产低碳钢带钢,采用层流冷却后段冷却且卷取温度低于空冷的Ar1时,由于抑制了先共析铁素体的析出,成品带钢组织中获得了远超平衡含量的退化伪珠光体组织。本试验研究了层流冷却后段冷却下不同卷取温度对带钢显微组织、力学性能的影响。结果表明:卷取温度在600℃以上时,卷取温度越低,带钢的强度越高;卷取温度为540℃时,带钢组织中渗碳体在晶界偏聚程度较高,导致力学性能恶化。To low carbon steel,far more than balance content of pseudo-eutectoid pearlite could be gotten by inhibiting proeutectoid ferrite transformation and making final coiling temperature lower than the Ar1 of air cooling.The influence of difference coiling temperature on the microstructure and mechanical properties of tested steel was researched by back section cooling pattern.The results show that when the coiling temperature is higher than 600 ℃,the strength of tested steel is higher while the coiling temperature decreasing.When the coiling temperature is 540 ℃,the percentage of the cementite is high in grain boundary,so the mechanical properties are worse.

关 键 词：层流冷却 卷取温度 伪珠光体 珠光体退化 力学性能 

分 类 号：TG142.1[一般工业技术—材料科学与工程] TG335[金属学及工艺—金属材料]