变形工艺对微合金高强度钢组织的影响.pdfVIP

第30 卷第2 期 Vol. 30.No. 2 钢铁机敏 2仅)9年 4 月 IRON STEEL VANADIUM TITANIUM Ap时12∞9 变形工艺对微合金高强度钢组织的影晌 陈振业，徐光 (武、汉科技大学铜钱冶金及资掘利用教育部熏点实验室，湖北武祝 43∞81) 摘 要:在 THERM览CMASTOR -Z 热模拟试验机上进行了一种微含金高强度钢在不间变形程度、变形速率、变形道 次和冷却速度等工艺条件下的热模拟实验。分析比较了不同变形工艺参数对微合金高强度钢相变及组织的影响。 实验结巢表明，提高轧盾的冷却速度使Ar 温度降低;变形速率越大相变开始血腥越南:变形程度越大相变开始温 1 度越高。增大变形程度，采用多道次轧制，轧后快速冷却，均有助于铁素体晶粒的细化和减少珠光体的含量。实验 140 c。 钢种的 两相区的温度跑回大于 γ+α 关键词:微合金化;高强度钢;变形工艺;晶控细化;显微组织;相变温度 中团分类号:TG335 )t献标识码:A 文章编号:1∞4 -7638(2∞9)02 -0055 -06 Influeoce of Deformatioo Parameters 00 Microstructure of Micro-alloyed High Streogth Steel Chen Zhenye ,Xu Guang (Key Laboratory for Ferrou5 Metallurgy and Recourses Utilizatíon of Mínistry of Education , Wuhan University of Scíence and Technology , Wuhan 43∞81 ， Hubei , China) Abstract: 啊le experiments of a micro帽alloyed high strength steel under different strain , strain rates , de- formation passes and cooling rates were conducted on the thermal嗣simulator of THERMECMASTOR Z. 咀le effects of deformation parameters on microstructure and phase transformation of the micro-alloyed high strength steel were analyzed. It has been found that the Ar3 temperature decreases with the Încrease of the cooling rate. The higher the strain rate , the higher phase transformation tempcrature. Phase transforma- tion temperature increases with the increase of strain. The ferrite grain will be refined and the pearlite a- mount will be decreased by the