热加工工艺
熱加工工藝
열가공공예
HOT WORKING TECHNOLOGY
2010年
2期
38-39,42
,共3页
张永军%韩静涛%孔俊其%侯月华%郑永瑞
張永軍%韓靜濤%孔俊其%侯月華%鄭永瑞
장영군%한정도%공준기%후월화%정영서
SCM435%热模拟%连续冷却转变曲线
SCM435%熱模擬%連續冷卻轉變麯線
SCM435%열모의%련속냉각전변곡선
SCM435%thermal mechanical simulation%CCT curve
采用Gleeble-1500热模拟机测定了SCM435冷镦钢在不同冷速下连续冷却转变的膨胀曲线,结合光学显微镜的微观组织观察,测绘了该钢热变形奥氏体连续冷却转变过程中的动态CCT曲线;研究了其连续冷却转变产物的组织形态.实验结果表明,SCM435在0.5～30℃/s冷却速率下的组织主要由铁索体+珠光体、铁索体+珠光体+贝氏体、贝氏体+马氏体、马氏体组成.
採用Gleeble-1500熱模擬機測定瞭SCM435冷鐓鋼在不同冷速下連續冷卻轉變的膨脹麯線,結閤光學顯微鏡的微觀組織觀察,測繪瞭該鋼熱變形奧氏體連續冷卻轉變過程中的動態CCT麯線;研究瞭其連續冷卻轉變產物的組織形態.實驗結果錶明,SCM435在0.5～30℃/s冷卻速率下的組織主要由鐵索體+珠光體、鐵索體+珠光體+貝氏體、貝氏體+馬氏體、馬氏體組成.
채용Gleeble-1500열모의궤측정료SCM435랭대강재불동랭속하련속냉각전변적팽창곡선,결합광학현미경적미관조직관찰,측회료해강열변형오씨체련속냉각전변과정중적동태CCT곡선;연구료기련속냉각전변산물적조직형태.실험결과표명,SCM435재0.5～30℃/s냉각속솔하적조직주요유철색체+주광체、철색체+주광체+패씨체、패씨체+마씨체、마씨체조성.
By measuring the dilatometric curves of SCM435 steel under different cooling speed on Gleeble-1500 thermo-mechanical simulator,and combining with metallographic analysis,CCT diagram of hot deformed austenite in continuous cooling transformation was obtained,and the products'microstrcture of the continuous cooling transformation occurring in SCM435 was investigated.The results show that the microstructure ofthe steel consists of ferrite+pearlite,ferrite +pearlite+bainite.bainite+martensite and martensite at the cooling rate from 0.5℃/s to 30℃/s.
