基于温变形耦合逆相变细化铁素体制备  

Ferrite refinement preparation based on coupling of warm deformation and reversal transformation

作　　者：王志豪 李红斌 刘立涛 Wang Zhihao;Li Hongbin;Liu Litao(College of Metallurgy and Energy,North China University of Science and Technology,Tangshan Hebei 063210,China;Hebei Jinxi Iron&Steel Group Co.,Ltd.,Tangshan Hebei 064302,China)

机构地区：[1]华北理工大学冶金与能源学院,河北唐山063210 [2]河北津西钢铁集团股份有限公司,河北唐山064302

出　　处：《金属热处理》2023年第4期35-40,共6页Heat Treatment of Metals

基　　金：河北省自然科学基金高端钢铁冶金联合基金(E2020209040);华北理工大学生创新项目(X2021325)。

摘　　要：采用Gleeble-3500热模拟试验机进行650℃多道次温变形以研究某中碳钢奥氏体及铁素体晶粒的细化,并利用OM、TEM和EBSD等检测手段进行表征。结果表明,650℃下6道次的快速压缩变形(总应变为2.6)后有逆转变发生,所得奥氏体晶粒平均尺寸为3.4μm;再在10℃/s的速率冷却到600℃,可以形成平均晶粒尺寸为0.64μm的铁素体,且渗碳体呈粒状分布于基体之上。Refinements of austenite and ferrite grains in a medium carbon steel were studied by multi-pass warm deformation at 650℃by Gleeble-3500 thermal simulation machine,and characterized by OM,TEM and EBSD.The results show that the 6-passes high strain rate compressive deformation induces austenite reversal transformation,and the mean grain diameter of austenite is 3.4μm.During cooling down to 600℃at a rate of 10℃/s,the ferrite with mean grain diameter of about 0.64μm is formed from the reversed austenite,and the cementite particles are distributed in the ferrite matrix.

关 键 词：中碳钢 温变形 形变诱发逆转变 晶粒细化 粒状渗碳体 

分 类 号：TG156.1[金属学及工艺—热处理]