摘要
利用Gleeble-3500热模拟实验机测定了0.33C-1.0Mn-0.8Si钢的静态(不变形)与动态(变形)CCT (连续冷却转变)曲线,并观察了钢的组织。结果可见,形变可以提高铁素体转变的开始温度,但对转变终了温度基本没有影响,变形后过冷奥氏体的铁素体转变区扩大,动态Ar_3的值比相同冷却条件下静态时Ar_3高出近100℃,形变对Ar_1的影响不明显;随着冷却速度的增大,铁素体晶粒由多边形状变成条状或长片状,珠光体团也变得更细小、弥散,且动态连续冷却组织比静态连续冷却组织细小。
Static （non-deformation） and dynamic （deformation） continuous cooling transformation （CCT） curves of steel 0. 33C-1.0Mn-0. 8Si was measured by Gleeble-3500 thermo-mechanical simulator, and structure of steel was observed. Results showed that the deformation of overcooling austenite could increase initial transformation temperature of ferrite, but had no obvious influence on temperature of completion of transformation, the zone of ferrite transformation of de- formed overcooling austenite enlarged, and Ar3 value for deformed austenite was higher by 100℃ than that for non-deformed austenite while effect of deformation on Ar1 was no-obvious ; and with increasing cooling rate, the morphology of ferrite grain changed from polygonal to lath and long leaf structure and the pearlite colonies became more fine and dispersed, and the continuous cooling structure for deformed austenite was finer than that for non-deformed austenite.
出处
《特殊钢》
北大核心
2009年第2期55-57,共3页
Special Steel
基金
"河北省自然科学基金"资助项目(E2006000358)
