摘要
采用电子显微镜(SEM)、力学性能测试等手段,分析了10CrNi3MoV船用钢热冲压成形前后微观结构变化,及热冲压成形后材料表层渐变微观结构和里层马氏体结构产生原因与变化规律。研究表明,在热冲压成形过程中,10CrNi3MoV船用钢受急剧的冷热交互作用及高温氧化脱碳等的影响,其表层由里到表依次形成由完全马氏体、马氏体与铁素体的混合组织、铁素体组成的渐变微观结构,里层则形成以均匀的板条状的马氏体组织为主的微观结构。10CrNi3MoV船用钢热冲压成形后,其表层渐变微观结构能有效地降低结构的峰值冲击力,保证内层强度大的马氏体材料不至于过早失效,而材料较平缓的结构峰值力及逐层失效的特点,使热冲压成形后的成形件保持较高的吸能能力和抗冲击性能。
Microstructural changes of 10 CrNi3MoV marine steel before and after hot stamping are analyzed by using scanning electron microscope(SEM) and mechanical performance tests. The causes and change law of the surface microstructure and the interior martensite structure of the material after hot stamping are analyzed. The study shows that in the hot stamping forming process, 10 CrNi3MoV marine steel is affected by rapid cold-heat interaction and high-temperature oxidative decarburization, the gradually changing microstructure of the surface layer is formed from inside to outside by complete martensite, mixed structure of martensite and ferrite, ferrite. The inner layer forms a microstructure mainly composed of a uniform lath martensite structure. After hot stamping of 10 CrNi3MoV marine steel, the gradually changing surface microstructure can effectively reduce the peak impact force of the structure, which can ensure that the martensite material with high inner strength does not fail prematurely. The material has a relatively flat structure peak force and layer-by-layer failure characteristics, so that the formed parts after hot stamping maintain high energy absorption capacity and impact resistance.
作者
郭幼丹
王大镇
吴华峰
吴亚平
GUO Youdan;WANG Dazhen;WU Huafeng;WU Yaping(Jimei University,College of Mechanical and Energy Engineering,Fiyian Xiamen 361021,China;Jimei University,College of Marine Engineering Institute,Fiyian Xiamen 361021,China)
出处
《船舶工程》
CSCD
北大核心
2019年第11期105-109,141,共6页
Ship Engineering
基金
福建省科技计划引导性（重点）项目（2016H0023）
福建省自然科学基金项目（2014J01200
2019J01327）
关键词
高强度船用钢
热冲压成形
渐变微观结构
抗冲击性能
high strength marine steel
hot stamping
gradually changing microstructure
impact resistance
作者简介
郭幼丹(1960-),男,教授,研究方向:材料成形、材料微观结构与性能;通信作者:王大镇(1962-)男,博士、教授。E-mail:dazhenwang@163.com。
