激光冲击处理超细晶粒高碳钢的微观组织和力学性能
发布时间：2019-05-27 20:05
【摘要】：借助扫描电子显微镜(SEM)、透射电子显微镜(TEM)、微力材料拉伸试验机和显微硬度计等手段,研究了超细晶粒高碳钢多道次激光冲击强化(LSP)处理后的微观组织演变和力学性能的变化规律。结果表明,强激光诱导冲击波超高应变率变形使超细晶粒高碳钢微复相组织中等轴铁素体晶粒的直径和球化完全的渗碳体颗粒的粒径分别由400 nm和150 nm进一步细化至200 nm和100 nm左右,使力学性能指标和显微硬度得到明显提高,塑性指标也有一定程度的改善,但是断口形貌由韧性断裂特征向准解理和韧性混合型断裂转变。
[Abstract]:By means of scanning electron microscope (SEM), transmission electron microscope (TEM), tensile testing machine and microhardness tester, The microstructure evolution and mechanical properties of ultra-fine grain high carbon steel treated with multi-pass laser shock enhanced (LSP) were studied. The results show that The ultra-high strain rate deformation of shock wave induced by high intensity laser leads to the further refinement of the diameter of equiaxed Ferrite grains in the micromultiphase microstructure of ultra-fine grain high carbon steel and the particle size of cementite particles with complete spheroidization from 400 nm and 150 nm to about 200 nm and 100 nm, respectively. The mechanical properties and microhardness are obviously improved, and the plasticity index is also improved to a certain extent, but the fracture morphology changes from ductile fracture characteristics to quasi-cleavage and ductile mixed fracture.
【作者单位】： 河南科技大学材料科学与工程学院;有色金属共性技术河南省协同创新中心;
【基金】：国家自然科学基金50801021和5120106 河南省高等学校青年骨干教师项目2011GGJS-070 江苏省光子制造科学与技术重点实验室开放基金GZ201204资助项目~~
【分类号】：TG142.1;TG665
[Abstract]:By means of scanning electron microscope (SEM), transmission electron microscope (TEM), tensile testing machine and microhardness tester, The microstructure evolution and mechanical properties of ultra-fine grain high carbon steel treated with multi-pass laser shock enhanced (LSP) were studied. The results show that The ultra-high strain rate deformation of shock wave induced by high intensity laser leads to the further refinement of the diameter of equiaxed Ferrite grains in the micromultiphase microstructure of ultra-fine grain high carbon steel and the particle size of cementite particles with complete spheroidization from 400 nm and 150 nm to about 200 nm and 100 nm, respectively. The mechanical properties and microhardness are obviously improved, and the plasticity index is also improved to a certain extent, but the fracture morphology changes from ductile fracture characteristics to quasi-cleavage and ductile mixed fracture.
【作者单位】： 河南科技大学材料科学与工程学院;有色金属共性技术河南省协同创新中心;
【基金】：国家自然科学基金50801021和5120106 河南省高等学校青年骨干教师项目2011GGJS-070 江苏省光子制造科学与技术重点实验室开放基金GZ201204资助项目~~
【分类号】：TG142.1;TG665
【参考文献】
相关期刊论文 前7条
1 孔德军;张永康;鲁金忠;邹世坤;;激光冲击处理后Ni基高温合金的性能[J];材料研究学报;2006年05期
2 罗新民;马辉;张静文;陈康敏;张永康;罗开玉;;激光冲击诱导的奥氏体不锈钢表层纳晶化[J];中国激光;2011年06期
3 钟俊伟;鲁金忠;罗开玉;杨超君;戴峰泽;钟金杉;王庆伟;齐晗;张磊;;AISI 8620合金钢激光冲击强化层摩擦学特性[J];中国激光;2012年01期
4 陈国安;杨王s，
本文编号：2486443
本文链接：https://www.wllwen.com/kejilunwen/jinshugongy/2486443.html
教材专著
